Multilin DGCM Field RTU Instruction Manual GENERAL SAFETY PRECAUTIONS • Thoroughly and carefully...

GE Multilin’s Quality Management System is

registered to ISO9001:2008

QMI # 005094

GEDigital Energy

*1601-9208-A3*

Instruction ManualMultilin DGCM Revision: 4.0x Manual P/N: 1601-9208-A3 Manual Order Code: GEK-119505B

Multilin DGCMField RTU

© 2014 GE Multilin Inc. All rights reserved.The Multilin DGCM Instruction Manual for revision 4.0x.Multilin DGCM, EnerVista, EnerVista Launchpad, and EnerVista DGCM Setup are registered trademarks of GE Multilin Inc.The contents of this manual are the property of GE Multilin Inc. This documentation is furnished on license and may not be reproduced in whole or in part without the permission of GE Multilin Inc. The content of this manual is for informational use only and is subject to change without notice.Part number: 1601-9208-A3 (March 2014)

Note

GENERAL SAFETY PRECAUTIONS• Thoroughly and carefully read this instruction sheet and the product manual

before programming, operating, or maintaining the DGCM Field RTU. Familiarize yourself with “SAFETY INFORMATION” on this page.

• The equipment covered by this publication must be installed, operated, and maintained by qualified personal who are knowledgeable in the installation, operation, and maintenance of overhead electric power distribution equipment along with the associated hazards.

• The user shall be responsible for ensuring the integrity of any Protective conductor connections before carrying out other actions.

• It is the responsibility of the user to check the equipment ratings and operating Instructions / installation Instructions prior to commissioning, service.

• Prior to servicing / commissioning ensure the Protective earth (PE) conductor is connected to Earth Ground prior to conducting any work

• Use a lift system with side rails/bucket to reduce a fall hazard as opposed to other means when installing or servicing.

• Do not disconnect power connectors on the DGCM when the system is on LIVE.

• The antenna provided must not be replaced with a different type. Attaching a different antenna will void the FCC and IC approval and the FCC /IC ID can no longer be considered.

• Do not remove CT terminal blocks or disconnect CT input wires when the CT phases are live. The CT I/P terminals must be shorted externally or de-energized prior to any servicing.

• Installers must follow regional requirements and or company policies regarding SAFE WORK PRACTICES. The use of proper and adequate PPE is mandatory. When mounting this unit on a pole or at heights greater than 6 ft adequate lift equipment must be used to decrease the fall hazard possibility.

FCC/Industry Canada

This device complies with Part 15 of the FCC and Industry Canada Rules. Operation is subject to the following two conditions (1) This device may not cause harmful interference, and (2) this device must accept any interference that may cause undesired operation.

L’appareil conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisé aux deux conditions suivantes:

1. L'appareil ne doit pas produire de brouillage

• L'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement

Safety Words and DefinitionsThe following symbols used in this document indicate the following conditions:

Indicates a hazardous situation which, if not avoided, will result in death or serious injury.

Indicates a hazardous situation which, if not avoided, could result in death or serious injury.

Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

Note Indicates significant issues and practices that are not related to personal injury.

For further assistanceFor product support, contact the information and call center as follows:

GE Digital Energy650 Markland StreetMarkham, OntarioCanada L6C 0M1Worldwide telephone: +1 905 927 7070Europe/Middle East/Africa telephone: +34 94 485 88 54North America toll-free: 1 800 547 8629Fax: +1 905 927 5098Worldwide e-mail: [email protected] e-mail: [email protected]: http://www.gedigitalenergy.com/multilin

WarrantyFor products shipped as of 1 October 2013, GE Digital Energy warrants most of its GE manufactured products for 10 years. For warranty details including any limitations and disclaimers, see the GE Digital Energy Terms and Conditions at https://www.gedigitalenergy.com/multilin/warranty.htm

For products shipped before 1 October 2013, the standard 24-month warranty applies.

mailto:[email protected]

mailto:[email protected]

http://gedigitalenergy.com/multilin

https://www.gedigitalenergy.com/multilin/warranty.htm

Table of Contents

1.INTRODUCTION Overview .............................................................................................................................................. 1 - 1Description of the DGCM ............................................................................................................. 1 - 1Applications ........................................................................................................................................ 1 - 4DGCM order codes .......................................................................................................................... 1 - 9Specifications..................................................................................................................................... 1 - 9

Protection alarm elements ................................................................................................................ 1 - 10Monitoring.................................................................................................................................................. 1 - 12Metering...................................................................................................................................................... 1 - 12Inputs and outputs ................................................................................................................................ 1 - 13Power supply ............................................................................................................................................ 1 - 14Communications .................................................................................................................................... 1 - 14Testing and certification ..................................................................................................................... 1 - 14Environmental.......................................................................................................................................... 1 - 15

2.INSTALLATION Mechanical installation ................................................................................................................. 2 - 1Electrical installation ...................................................................................................................... 2 - 5DGCM Field RTU installation guide.........................................................................................2 - 11

Accessing the DGCM unit ................................................................................................................... 2 - 11Power supply and voltage inputs wiring ..................................................................................... 2 - 12Rogowski inputs...................................................................................................................................... 2 - 13

3.INTERFACES Software setup .................................................................................................................................. 3 - 2EnerVista DGCM Setup software........................................................................................................3 - 2Connecting EnerVista DGCM Setup to the device......................................................................3 - 5Working with settings and settings files.........................................................................................3 - 9Upgrading DGCM firmware ............................................................................................................... 3 - 14Advanced EnerVista DGCM Setup features ............................................................................... 3 - 16

4.ACTUAL VALUES A1 Status .............................................................................................................................................. 4 - 1Clock ................................................................................................................................................................4 - 1Modem actual values ..............................................................................................................................4 - 2Contact inputs ............................................................................................................................................4 - 3Contact outputs .........................................................................................................................................4 - 4Virtual inputs................................................................................................................................................4 - 4Virtual outputs ............................................................................................................................................4 - 5Flexlogic summary....................................................................................................................................4 - 6

A2 Metering......................................................................................................................................... 4 - 6Current source 1 (6) ..................................................................................................................................4 - 6Bus................................................................................................................................................................. 4 - 10Voltage source......................................................................................................................................... 4 - 12Frequency .................................................................................................................................................. 4 - 14Power calculation................................................................................................................................... 4 - 14

A3 Records ........................................................................................................................................4 - 16Event records ........................................................................................................................................... 4 - 16Data logger ............................................................................................................................................... 4 - 17VDI sag ........................................................................................................................................................ 4 - 17VDI swell...................................................................................................................................................... 4 - 18

MULTILIN DGCM – INSTRUCTION MANUAL TOC–I

5.SETPOINTS S1 Product setup...............................................................................................................................5 - 1Clock setup................................................................................................................................................... 5 - 2SNTP ................................................................................................................................................................ 5 - 3Password security .................................................................................................................................... 5 - 3Communications....................................................................................................................................... 5 - 5Event recorder..........................................................................................................................................5 - 11Data logger ................................................................................................................................................5 - 13Statistics ......................................................................................................................................................5 - 15Front panel.................................................................................................................................................5 - 15Installation..................................................................................................................................................5 - 17

S2 System setup............................................................................................................................. 5 - 17Power system ...........................................................................................................................................5 - 18Current setup ............................................................................................................................................5 - 18Bus setup ....................................................................................................................................................5 - 21Voltage setup............................................................................................................................................5 - 21

S3 Configuration ............................................................................................................................ 5 - 23Current alarms .........................................................................................................................................5 - 24Voltage alarms.........................................................................................................................................5 - 50

S4 Controls........................................................................................................................................ 5 - 66Change setpoint group ........................................................................................................................5 - 66Virtual input commands ......................................................................................................................5 - 68Cold load pickup......................................................................................................................................5 - 69

S5 Inputs and outputs ................................................................................................................. 5 - 73Contact inputs ..........................................................................................................................................5 - 73Output relays ............................................................................................................................................5 - 74Virtual inputs .............................................................................................................................................5 - 77

FlexLogic™........................................................................................................................................ 5 - 78FlexLogic™ operands............................................................................................................................5 - 79

6.COMMANDS

7.MAINTENANCE M1 Product information.................................................................................................................7 - 1M2 Product maintenance .............................................................................................................7 - 2Modbus analyzer...............................................................................................................................7 - 3Update firmware...............................................................................................................................7 - 3

8.APPLICATIONS System configuration examples................................................................................................8 - 1Example 1 ..................................................................................................................................................... 8 - 1Example 2 ..................................................................................................................................................... 8 - 3

APPENDIX A Change notes .....................................................................................................................................A - 1Revision history.......................................................................................................................................... A - 1

TOC–II MULTILIN DGCM – INSTRUCTION MANUAL

Multilin DGCM

Chapter 1: Introduction

GEDigital Energy

Introduction

Overview

The DGCM is a microprocessor-based unit that belongs to the Distribution Grid Controller family, and it is designed as a field RTU. This device is intended to control and monitor up to 6 feeders using different types of current and voltage sensors including traditional CTs/VTs, Rogowski coils, and LEA.

Description of the DGCM

The GE Multilin DGCM is a versatile Field RTU that can be applied to monitor and control a wide range of pole-top, padmount, and underground distribution assets. This compact solution is designed for easy installation on new equipment and retrofit on installed assets making distribution modernization a cost-effective endeavor.The GE Multilin DGCM supports most wired and wireless communication architectures along with multiple simultaneous industry standard communication protocols making integration into SCADA and DMS systems a seamless and straightforward process.

MULTILIN DGCM – INSTRUCTION MANUAL 1–1

DESCRIPTION OF THE DGCM CHAPTER 1: INTRODUCTION

Figure 1-1: Application - meter in a typical distribution network

The DGCM Field RTU supports:

• Real-time load monitoring and profiling of up to 6 Feeders (18 individual phases)

• Overcurrent detection per phase (50, 51) for each feeder identifying faulted circuits & loads approaching overload levels

• Advanced Flexlogic engine enabling Automated switching schemes

• Supports Rogowski coil current sensors for quick retrofit installation and in tight spaces

• Supports voltage sensors

MAIN FUNCTIONS OF THE DGCM FIELD RTU

Overcurrent DetectionThe Multilin DGCM has phase instantaneous and phase time overcurrent elements. The overcurrent protection generates alarms when the current exceeds the selected current level. The Multilin DGCM has one instantaneous overcurrent detection function Phase IOC. It consists of three separate instantaneous overcurrent elements; one per phase, with identical settings.Overvoltage DetectionThe phase OV protection protects voltage sensitive feeder loads and circuits against sustained overvoltage conditions. The phase OV protection generates alarms when the voltage exceeds the selected voltage level for the specified time delay.Undervoltage DetectionThe phase UV protection protects voltage sensitive feeder loads and circuits against sustained undervoltage conditions. The phase UV protection generates alarms when the voltage drops below the selected voltage level for the specified time delay.Phase Voltage Loss

SUBSTATION 2

UNDERGROUND CABLES

UNDERGROUND CABLES

MODERNIZING THE GRID

SWITCHGEAR / RMU

POLE-TOP EQUIPMENT

FROM SUBSTATION 1

TO SUBSTATION 3

TRANSFORMER

RESIDENTIAL/ COMMERCIAL CONSUMERLV DISTRIBUTION

SYSTEM

MONITORING & CONTROL

TR

ANSFORMER MONITORING

INDUSTRIAL CONSUMER

POLE-TOP EQUIPMENT

PAD-MOUNT SWITCHGEAR /RM

U

MONITORING & CONTROL

LV DISTRIBUTION SYSTEM

MONITORING AND CONTROL

POLE-TOP EQUIPMENT

M OL

1–2 MULTILIN DGCM – INSTRUCTION MANUAL

CHAPTER 1: INTRODUCTION DESCRIPTION OF THE DGCM

The phase loss protection feature can be used to generate an alarm when the voltage drops below a specified voltage setting for a specified time delay. It is very useful in the case of voltage sensitive loads, such as induction motors, where a drop in voltage will result in an increase in the drawn current, which may cause dangerous overheating in the motor.Current UnbalanceThe current unbalance feature can be used to generate an alarm when the current unbalance level, defined as the ratio of negative-sequence to positive-sequence current, reaches or exceeds the set pickup level for the set delay time.Voltage UnbalanceThe voltage unbalance feature can be used to generate an alarm when the voltage unbalance level, defined as the ratio of negative-sequence to positive-sequence voltage, reaches or exceeds the set pickup level for the set delay time.Cold Load PickupUsing the cold load pickup function, the Multilin DGCM can be programmed to both block instantaneous over-current elements and raise the pickup level of time over-current elements when a cold load condition is detected.Virtual Inputs and OutputsThe Multilin DGCM provides 32 virtual inputs and 32 virtual outputs that provide users with the ability to send commands to the device. The Multilin DGCM can accept commands from SCADA, or front USB port to issue commands such as close or open.Command SettingThe Multilin DGCM has the ability to force commands from the menu structure. This can also be achieved via the EnerVista™ software that runs on a PC.FlexLogic™FlexLogic in the Multilin DGCM provides the ability to create customized control schemes. This minimizes the need and costs associated with auxiliary components and wiring. Schemes can be configured with FlexLogic specifying what actions need be taken based on the status of fault detections or control elements, as well as inputs driven by connected sensors and equipment.Metering and MonitoringThe Multilin DGCM provides high accuracy metering and recording of all AC signals, measuring the following key parameters:

• Phase-Ground Voltages (kV)

• Phase to Phase Voltages (kV)

• Positive, Negative, Zero Sequence Voltage

• Phase A, B, and C Currents (A)

• Positive, Negative, Zero Sequence Current

• Ground Current (A)

• 3-Phase Active Power (KW)

• 3-Phase Reactive Power (KVar)

• 3-Phase Apparent Power (KVA)

• 3-Phase Average Power (KW)

• Power Factor (Lag or Lead)

• Pos. & Neg. (Import & Export) Real Energy (kWh)

• Pos. & Neg. (Import & Export) Reactive Energy (kVarh)

• THD

• Voltage Sag and Swell (Voltage Disturbance Indicator function)

Event Recorder


APPLICATIONS CHAPTER 1: INTRODUCTION

To significantly reduce time and enable more effective distribution, post fault analysis and troubleshooting, the Multilin DGCM provides an integrated event recorder and detailed diagnostic features. The sequence of events recorder offers the following features:

• Up to 1024 consecutive events stored

• Enable or disable, operate and dropout events by set points

• Phase voltage/current and power metering shot is also included and stored at each event

Data Management & DiagnosticsThe Multilin DGCM provides advanced disturbance diagnostic features that significantly reduce the time and costs associated with troubleshooting power system events and reconstruction. Recording functions include enhanced diagnostics with a 200 channel RMS recorder data logger.

Applications

This section provides several usage examples of the DGCM:

• End of Line Monitoring

• RMU and Pad Mounted Switchgear

• Pole Top Applications

• Consumer Substation and LV Systems

• Pole Top and Pad Mounted Transformers

• Cable in Vaults and Cable Joint Boxes

End of Line Monitoring ApplicationUtility and industrial end of line monitoring for Volt/VAr control schemes play an important role in voltage optimization by ensuring the end customer is being provided with the proper voltage level.The Multilin DGCM can be used in applications where only voltage and/or current monitoring is required by high-end SCADA or DMS systems.

Figure 1-2: DGCM and End of Line Application

This application supports the following functions:

• Measures end-of-line voltage and current

• Monitors energy usage and logs this data

DGCM

Voltage Inputs

Current Inputs


CHAPTER 1: INTRODUCTION APPLICATIONS

• Overcurrent detection and alarm

• Private radio and cellular network support for communications

RMU/Pad Mounted Switchgear ApplicationEnhancing Ring Main Units (RMUs) and pad mounted switchgear with detection functionality has its own challenges regarding the mounting of conventional MV transformers. The Multilin DGCM enables the power utility to overcome these challenges by offering Rogowski coil and Low Energy Analog (LEA) compatibility for current and voltage inputs.

Figure 1-3: DGCM and RMU/Pad Mounted Switchgear

For this application the DGCM provides the following support:

• Rogowski coils and traditional CTs

• Advanced Flexlogic engine to enable automated switching schemes

• Real-time load monitoring and profiling for up to 6 feeders (18 individual phases)

• Expandable digital inputs and outputs

• Overcurrent detection per phase (50, 51) for each feeder

Pole Top ApplicationsThe Multilin DGCM can be used for a wide range of pole top applications, such as remote controls for reclosers, switches, sectionalizers, interchange tie closures, tap changers, and capacitor bank controllers. The Multilin DGCM’s hardware and communication flexibility can be applied to a wide variety of field applications where monitoring and/or remote control is required.

M M M M M

DGCM

RMU/Pad Mounted Switchgear

Up to 64 DI& 32 DO

1 to 6 Feeders

Up to 6 Current Inputs

Up to 6Voltage

Inputs



Figure 1-4: DGCM and Pole Top Application

In this application the DGCM provides support for:

• Direct voltage measurements up to 400V or LEA voltage

• Creation of customized control schemes via Flexlogic engine

• Remote configuration and firmware update

• Monitors energy usage and logs the data

• Overcurrent detection per phase (50, 51) for each feeder

Consumer and Substation LV Systems ApplicationMost consumer substations and indoor/outdoor LV systems lack asset monitoring and control. The Multilin DGCM can be used to effectively monitor power quality, as well as control, when necessary. Rogowski coil support provides current sensing in hard-to-find spaces and allows for modifications without an actual outage. The provision of overcurrent detection provides a vital warning signal well in advance of an actual failure.

SWITCHING DEVICE

LINE LOAD

ABC

ABC

DGCM


CHAPTER 1: INTRODUCTION APPLICATIONS

Figure 1-5: DGCM and Consumer and Substation LV Systems

In this application the DGCM provides the following functionality:

• Monitoring of real-time load and energy, and profiling of up to 6 feeders (18 individual phases).

• Capable of using Rogowski coil current sensors or traditional CTs for easy retrofit installation

• Direct voltage measurements of up to 400V or LEA voltage

• Capable of compensating for amplitude and phase shifts associated with different sensor types

• Identification of faulted circuits and Overcurrent detection per phase (50, 51) for each feeder

• Ability to ensure faster response time to SCADA and DMS systems via unsolicited messaging

• Identification of locations where theft is detected via individual feeder energy monitoring

Pole Top and Pad Mounted Transformers ApplicationThe Multilin DGCM enables the monitoring of transformer conditions, identifying transformers likely to fail. This keeps the power utility updated on changing load demands for pole top and pad mounted transformers, and enables the power utility to plan for current peak loads and future demand.

DGCM

LV Substation

Up to Voltage Inputs

1 to 6 FeedersUp to 18 Current Inputs



Figure 1-6: DGCM and Pole Top Mounted Transformer

The following functions are supported:

• Capable of using Rogowski coil current sensors or traditional CTs for easy retrofit installation

• Monitors energy usage and logs the data

• Monitors real-time transformer load.

• Compatible with existing infrastructure via multiple communication (cellular, radio) and protocol options

• Capable of remote configuration and firmware updates

Application for Cable in Vaults and Cable Joint BoxesUnderground networks require the quick identification of faults. Deployment of the Multilin DGCM at strategic locations along cable paths enables faster fault detection as well as early warning signals in case of overload.

Figure 1-7: DGCM and Cable in Vaults and Cable Joint Boxes

In this application the following functions are supported:

• Capable of detecting faults for underground cable networks

• Easy retrofit installation for locations where space is limited

DGCM

Voltage Inputs

Current Inputs

DGCM

1 to 6 FeedersUp to 18 Current Inputs

Up to 6 sets of 3-Phase cables


CHAPTER 1: INTRODUCTION DGCM ORDER CODES

• Early warning and fault detection per phase (50, 51) for each feeder

• Compatibility with existing infrastructure i.e., DMS and SCADA via multiple communication (cellular, radio) and protocol options

DGCM order codes

Figure 1-8: Order Codes

Specifications

Slots A B C D E F 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Description DGCM * - * * * - * S - * - * - X - X - X - X * 1 *

Field RTUCPU type A I I I I I I I I I I I I Base unit includes: 3 x Voltage inputs (60 to 600 VAC) B I I I I I I I I I I I I Base unit includes: 3 x Voltage inputs (0 to 12 VAC)Language E I I I I I I I I I I I EnglishPower Supply H I I I I I I I I I I High Volt AC Power Supply (110 V to 220 VAC / 230 VDC)

L I I I I I I I I I I Low Volt DC Power Supply (24 V to 48 VDC)Cellular Options X I I I I I I I I I No cellular communications

S I I I I I I I I I 3G communicationsCommunications S I I I I I I I I Standard Communications (Serial communications)Modules X X I I I I I I No module

C C I I I I I I 9 x CT inputs 5 Amp/1 Amp secondary (maximum 2) F F I I I I I I 9 x Rogowski Coil inputs (maximum 2) P P I I I I I I 16 x Digital Inputs, 8 x Digital Outputs (64 DI & 32 DO

max., 100-240V AC/DC) (maximum 4) Q Q I I I I I I 16 x Digital Inputs, 8 x Digital Outputs (64 DI & 32 DO

max., 20�60V DC) (maximum 4) X X X X I I Controllers 1 I Controller only (no display) 2 I Controller in enclosure (no display)External Communication

X No external communications

1 Long range High Speed Serial communicationMDS TransNet (EL805-MD9X1AFCD1WN) - Available with controller in enclosure

2 Long range Ethernet & Serial communicationMDS iNET-II (iNETII-MD9A1AVFCD1NN0) - Available with controller in enclosure

Rogowski Coil SensorsROGS - A A 3 Rogowski Coil Sensor, 3 meter termination length is

always supplied when the F option for Current input is ordered.


SPECIFICATIONS CHAPTER 1: INTRODUCTION

Protection alarm elementsPHASE HIGH INSTANTANEOUS OVERCURRENTCurrent:.................................................................... FundamentalPickup Level: ......................................................... 0.05 - 2.5 x CT in steps of 0.01 x CT (for Traditional CT);

0.05 - 1.5 x CT in steps of 0.01 x CT (for Rogowski Coil)Dropout Level: ...................................................... 95 to 98% of Pickup or ±0.02 x CT (whichever is greater)Time Delay:............................................................ 0.00 to 600.00 s in steps of 0.01Operate Time: ...................................................... <50 ms @ (I > 1.5 x Pickup level)Level Accuracy:.................................................... ±1% at rated current; ±3% for current higher than 0.1 x CTTiming Accuracy: ................................................ ±3% of alarm time or ±40 ms (whichever is greater)

PHASE LOW INSTANTANEOUS OVERCURRENTCurrent:.................................................................... FundamentalPickup Level: ......................................................... 0.05 - 2.50 x CT in steps of 0.01 x CTDropout Level: ...................................................... 95 to 98% of Pickup or ±0.02 x CT (whichever is greater)Time Delay:............................................................ 0.00 to 600.00 s in steps of 0.01Operate Time: ...................................................... <50 ms @ (I > 1.5 x Pickup level)Level Accuracy:.................................................... ±1% at rated current; ±3% for current higher than 0.1x CTTiming Accuracy: ................................................ ±3% of alarm time or ±40 ms (whichever is greater)

NEUTRAL INSTANTANEOUS OVERCURRENTNeutral Current:................................................... FundamentalPickup Level: ......................................................... 0.05 to 2.5 x CT in steps of 0.01 x CT (for Traditional CT);

0.05 to 1.5 X CT in steps of 0.01 x CT (for Rogowski Coil)Dropout Level: ...................................................... 95 to 98% of Pickup or ±0.02 x CT (whichever is greater)Time Delay:............................................................ 0.00 to 600.00 s in steps of 0.01Operate Time: ...................................................... <50 ms @ (I > 1.5 x Pickup level, no time delay)Level Accuracy:.................................................... ±1% at rated current; ±3% for current higher than 0.1 x CTTiming Accuracy: ................................................ ±3% of alarm time or ±40 ms (whichever is greater)

PHASE TIMED OVERCURRENT (51P)Current:.................................................................... Ia, Ib, IcPickup Level: ......................................................... 0.05 to 2.5 x CT in steps of 0.01 x CT (for Traditional CT);

0.05 to 1.5 X CT in steps of 0.01 x CT (for Rogowski Coil)Dropout Level: ...................................................... 95 to 98% of Pickup or ±0.02 x CT (whichever is greater)Curve Shape:......................................................... IEEE Extremely / Very / Moderately Inverse; IEC Curve A / B /

C and Short Inverse; IAC Extremely / Very / Inverse / Short Inverse; FlexCurve A, FlexCurve B, FlexCurve C, Definite time, User Curve

Curve Multiplier: .................................................. 0.00 to 20.00 in steps of 0.01Reset Time: ............................................................ Instantaneous, LinearLevel Accuracy:.................................................... ±3% for current higher than 0.1x CTTiming Accuracy: ................................................ ±3% of alarm time or ±40 ms (whichever is greater)

NEUTRAL TIMED OVERCURRENTCurrent:.................................................................... FundamentalPickup Level: ......................................................... 0.05 to 2.5 x CT in steps of 0.01 x CT (for Traditional CT);

0.05 to 1.5 X CT in steps of 0.01 x CT (for Rogowski Coil)Dropout Level: ...................................................... 95 to 98% of Pickup or ±0.02 x CT (whichever is greater)Curve Shape:......................................................... IEEE Extremely / Very / Moderately Inverse; IEC Curve A / B /

C and Short Inverse IAC; Extremely / Very / Inverse / Short Inverse; FlexCurve A, FlexCurve B, FlexCurve C, Definite time, User Curve

Curve Multiplier: .................................................. 0.00 to 20.00 in steps of 0.01Reset Time: ............................................................ Instantaneous, LinearLevel Accuracy:.................................................... ±3% for current higher than 0.1x CT;Timing Accuracy: ................................................ ±3% of alarm time or ±40 ms (whichever is greater)


CHAPTER 1: INTRODUCTION SPECIFICATIONS

PHASE OVERVOLTAGEPickup Level:.......................................................... 0.05 to 1.25 x VT in steps of 0.01Dropout Level: ...................................................... 95% to 99% of pickup (V > 0.1 x VT);

85% to 99% of pickup (V < 0.1 x VT)Time Delay: ............................................................ 0.0 to 600.0 s in steps of 0.1Operate Time:....................................................... time delay + up to 35 ms @ 60Hz (V > 1.1 x PKP);

time delay + up to 40 ms @ 50Hz (V > 1.1 x PKP)Time Delay Accuracy: ....................................... ±3% of alarm time or ±40 ms (whichever is greater)Level Accuracy: .................................................... per voltage input

PHASE UNDERCURRENTCurrent: .................................................................... FundamentalPickup Level:.......................................................... 0.05 to 2.5 x CT in steps of 0.01 x CT (for Traditional CT);

0.05 to 1.5 x CT in steps of 0.01 x CT (for Rogowski Coil)Dropout Level: ...................................................... 102% to 103% of pickupTime Delay: ............................................................ 0.00 to 600.00 s in steps of 0.01Operate Time:....................................................... <50 ms @ (I > 1.5 x Pickup level)Level Accuracy: .................................................... ±1% at rated current; ±3% for current higher than 0.1x CTTiming Accuracy: ................................................ ±3% of alarm time or ±40 ms (whichever is greater)

PHASE UNDERVOLTAGEMinimum Voltage:............................................... programmable from 0.00 to 1.25 x VT in steps of 0.01Pickup Level:.......................................................... 0.05 to 1.25 x VT in steps of 0.01Dropout Level: ...................................................... 101% to 104% of pickup (V > 0.1 x VT);

101% to 115% of pickup (V < 0.1 x VT)Time Delay: ............................................................ 0.1 to 600.0 s in steps of 0.1Operate Time:....................................................... Time Delay ± 30 ms @ 60Hz (V < 0.85 x PKP) Time Delay ± 40

ms @ 50Hz (V < 0.85 x PKP)Time Delay Accuracy: ....................................... ±3% of expected inverse time or ±40 ms, whichever is

greaterLevel Accuracy: .................................................... per voltage input

PHASE VOLTAGE LOSSMinimum Voltage:............................................... programmable from 0.00 to 1.25 x VT in steps of 0.01Pickup Level:.......................................................... 0.05 to 1.25 x VT in steps of 0.01Dropout Level: ...................................................... 101% to 104% of pickup (V > 0.1 x VT); 101% to 115% of

pickup (V < 0.1 x VT)Time Delay: ............................................................ 0.1 to 600.0 s in steps of 0.1Operate Time:....................................................... Time Delay ± 30 ms @ 60Hz (V < 0.85 x PKP)

Time Delay ± 40 ms @ 50Hz (V < 0.85 x PKP)Time Delay Accuracy: ....................................... ±3% of expected inverse time or ±40 ms, whichever is

greaterLevel Accuracy: .................................................... per voltage input

COLD LOAD PICKUPOperation:............................................................... Current level, or external command (asserted input)Function: ................................................................. Block Phase High IOC, Phase Low IOC, Neutral IOC, for

selected period of time Raising the pickup level of the Phase TOC and Neutral TOC elements

Time Delay Accuracy: ....................................... 0 to 1 cycle (block time) ± 50 ms (outage time < 5 min) ± 1 s (outage time > 5 min)

CURRENT UNBALANCE (46)Current Unbalance:............................................ I2/I1 * 100%Current Unbalance Pickup Level: ................ 4 to 40% in steps of 1%Current Unbalance Time Delay:................... 1.0 to 60.0 s in steps of 0.01 sCurrent Unbalance Dropout Level: ............. 95% to 98% of PickupCurrent Unbalance Pickup Accuracy:........ ± 2%Current Unbalance Timing Accuracy:....... ± 0.5 s or 0.5% of total time



VOLTAGE UNBALANCE (47)Voltage Unbalance: ........................................... V2/V1 * 100%Voltage Unbalance Pickup Level: ................ 4 to 40% in steps of 1%Voltage Unbalance Time Delay: .................. 1.0 to 60.0 s in steps of 0.01 sVoltage Unbalance Dropout Level: ............ 95% to 98% of PickupVoltage Unbalance Pickup Accuracy: ....... ± 2%Voltage Unbalance Timing Accuracy: ...... ± 0.5 s or 0.5% of total time

MonitoringDATA LOGGERNumber of Channels:........................................ 1 to 200Parameters:........................................................... Any available analog actual valueSampling Rate:..................................................... 1 min, 5 min, 10 min, 15 min, 30 min, 60 min.Storage Capacity: ............................................... This value is dependent on memory, 200 channels for 14

days at 30-minute rate; 100 channels for 4.6 days at 5-minute rate

EVENT RECORDERCapacity:................................................................. 1024 eventsTime-tag: ................................................................ To 1 microsecondTriggers: .................................................................. Any element pickup, dropout, or operate; digital input

change of state; digital output, change of state; self-test events

Data storage:........................................................ In non-volatile memory

MeteringFor the following, Accuracies are specified at 25° C and at nominal system frequency unless noted otherwise.

VOLTAGELow Range InputsRange: ...................................................................... 0 VAC to 10 VACAccuracy:................................................................ Phase to Ground Voltages: ±0.5%, reading ±0.2% full scale;

Phase to Phase Voltages: ±0.5%, reading ±0.2% full scale (for measured voltages)

High Range InputsRange: ...................................................................... 60 VAC to 300 VACAccuracy:................................................................ Phase to Ground Voltages: ±0.5%, reading ±0.2% full scale;

Phase to Phase Voltages: ±0.5%, reading ±0.2% full scale (for measured voltages)

CURRENTSRange for CT’s: ..................................................... :0.05 A to 2.5 times CT RatingRange for Rogowski coils:............................... 0.05 A to 1.5 times CT RatingAccuracy:................................................................ ±1°, reading ±0.2% full scale

Note that 1A or 5A CT’s are software selectable.

FREQUENCYFrequency: ............................................................. 40 to 70HzAccuracy:................................................................ ±0.01Hz

POWER FACTORRange: ...................................................................... 0.3 Lag to 1 to 0.6 Lead

PHASE ANGLEAccuracy:................................................................ 1°

POWER (VA, VAr, W)Accuracy:................................................................ ±1.5%; reading ±0.2% full scale (Vphase>60V; Iphase>0.05xCT)



ENERGY (VAh, VArh, Wh)Accuracy: ................................................................ ±1.5%; reading ±0.2% full scale (Vphase>60V; Iphase>0.05xCT)

HARMONICSHarmonics:............................................................. 2nd to 15th Harmonics in % f0

THD (IN PER CENT)Range: ...................................................................... 0.20% to 100% f0

VOLTAGE SAGPickup Level:.......................................................... 0.10 to 0.90 x VT in steps of 0.01Dropout Level: ...................................................... Pickup + 10% of nominal

VOLTAGE SWELLRange: ...................................................................... 0.10 to 1.80 x VT in steps of 0.01Range: ...................................................................... Pickup - 10% of nominal

Inputs and outputsPHASE CURRENT INPUTS (CTS)Input Range: .......................................................... 0.05 to 2.50 x CTInput Type:.............................................................. 1 A or 5 A (SW Selectable)Nominal Frequency: .......................................... 50 or 60 HzBurden: .................................................................... <0.1 VA at rated loadAccuracy: ................................................................ ±1% of reading ±0.2% of full scaleCT Withstand: ....................................................... 1 second at 20 times rated current, continuous at 4 times

rated current

PHASE CURRENT INPUTS (ROGOWSKI COILS)Input Range: .......................................................... 30 to 600 ANominal Frequency: .......................................... 50 or 60 HzAccuracy: ................................................................ ±2% of full scale

PHASE VOLTAGE INPUTS (DIRECT CONNECTION)Input Range: .......................................................... 60 to 300 VNominal Frequency: .......................................... 50 or 60 HzNominal Burden per phase: ........................... 51.7 mVA@100VAC per each voltage inputAccuracy: ................................................................ ±0.5% of readingVoltage withstand: .............................................600V continuous

PHASE VOLTAGE INPUTS (LEA)Input Range: .......................................................... 0 to 12 VACNominal Frequency: .......................................... 50 or 60 HzNominal Burden per phase: ........................... 50.013 mVA @ 12VAC per each voltage input Burden: .................................................................... <0.25 VAAccuracy: ................................................................ ±0.5% throughout rangeVoltage withstand: ............................................. 2 x Vn continuously, 3 x Vn 10s

DIGITAL INPUTSThreshold: ............................................................... 20 V to 64 VAC for low range

100 V to 240 VAC for high rangeRecognition Time:............................................... 1\2 CycleDebounce Time: .................................................. 10 to 100 ms, selectable in steps of 5 ms

DIGITAL OUTPUTSContact Material: ................................................ Silver AlloyOperate Time:....................................................... 10 msContinuos Current: ............................................. 6 AMake and Carry for 4s: ..................................... 15 A per ANSI C37.90



Power supplyHIGH RANGE POWER SUPPLYNominal:.................................................................. 110 to 240 VAC or 125 to 250 VDCRange: ...................................................................... 85 to 265 VAC (50 and 60 Hz) or

85 to 300 VDCVoltage Withstand: ............................................ 300 VAC Continuous, 2 x Nominal for 1 secondPower Consumption:......................................... 16 W typical and 45 W maximum

LOW RANGE POWER SUPPLYNominal:.................................................................. 24 to 48 VDC Range: ...................................................................... 20 to 60 VDC

CommunicationsSERIALBaud Rates: ........................................................... Up to 115 kbpsRS485 Port: ............................................................ Opto-coupledProtocol: .................................................................. Modbus RTU, DNP 3.0

ETHERNET (COPPER)Connector: ............................................................. RJ-45Mode:........................................................................ 10/100 MB (auto-detect)Protocol: .................................................................. Modbus TCP, DNP 3.0, IEC 60870-5-104

USBData Transfer Rate: ........................................... 115 kbpsStandard Specification: ................................... Compliant with USB 2.0

INTERNAL MODEMManufacture: ........................................................ Telit HE910 EDGE/GPRS/GSM module Quad-band EGSM:.............................................. 800/850, 900, AWS1700, 1900, 2100 MHz GSM/GPRS protocol stack: ............................. Compliant with 3GPP Release 7Control via AT commands: ............................. 3GPP 27.005, 27.007, and Telit custom AT commands Serial port multiplexer :.................................... 3GPP 27.010 Sensitivity: .............................................................. =< - 109 dBm (typ.) @ 850 / 900 MHz

=< - 110 dBm (typ.) @ 1800 / 1900 MHzExtended temperature range:...................... -40°C to +85°CCompliant with: ................................................... RoHS compliantApprovals: .............................................................. Fully type approved conforming with R&TTE directive,

CE, FCC, IC

Testing and certification

APPROVALS

Applicable Council Directive According to

CE compliance Low voltage directive IEC 61010-1/ IEC60255-27

EMC Directive EN50263/ IEC60255-26

R&TTE Directive ETSI EN301 511, ETSI EN301-489-1

ISO Manufactured under a registered quality program

ISO9001



Environmental

TYPE TESTS

Test Description Test Levels Reference Standard

Electrical (Category III, 300V)

Dielectric Strength Basic & supplementary insulation: 2.0kV at least 1 min

IEC 60255-27/EN 60255-5

Impulse 5kV 1.25/50us EN 60255-27

Clearance & Creepage Category III, 300V, Table D6 IEC 60255-27

Immunity

ESD 8kV contact / 15kV air discharge IEC 61000-4-2, EN60255-22-2

Radiated RF Immunity 10V/m (80MHz to 1GHz), (1.4 to 2.7GHz), 80, 160, 380, 450, 900, 1850, and 2150 MHZ Spot frequencies

IEC 61000-4-3, EN60255-22-3

Fast Transient 4kV at 5kHz IEC 61000-4-4/ IEC60255-22-4

Surge 2kV, Power ports: 2KV CM and 1KV DM, I/O ports: 1KV CM and 0.5KV DM

IEC60255-22-5/ IEC61000-4-5

Conducted RF Immunity 10 Vrms (150kHz to 80MHz) IEC 61000-4-6/ IEC60255-22-6

Power Frequency Magnetic Field Immunity

Level 5: 100A/m continuous, 1000A/m 1 to 3 s

IEC 61000-4-8

Voltage Dip 0% during 1 cycle, 40% during 10/12 cycles, 70% during 25/30 cycles, 80% during 250/300 cycles

IEC 61000-4-11

Voltage Interruption 0% during 250/300 cycles IEC 61000-4-11

Emission

Radiated RF Emission Group 1 & Class A CISPR 16-2-3, IEC60255-25

Conducted RF Emission Group 1 & Class A CISPR 22, IEC60255-25

Sinusoidal Vibration Class 1 IEC60255-21-1

Shock & Bump Class 1 IEC60255-21-2

Seismic Class 2 IEC60255-21-3

ENVIRONMENTAL SPECIFICATIONS

Ambient temperatures:

Storage/shipping: - 40oC to 90oC

Operating: - 40oC to 65oC

Humidity: Operating up to 95% (non condensing)

Altitude: 2000m (max)

Insulation Category: I

Overvoltage Category: III

Ingress Protection: IP44 with external enclosure

Pollution Degree: II


Multilin DGCM

Chapter 2: Installation

GEDigital Energy

Installation

This chapter provides information about the installation of the DGCM Field RTU device. In addition, this chapter is intended only for qualified, professional and skilled technicians authorised to act in accordance with the safety standards provided for the electrical installations. The authorised individual must have appropriate training and wear suitable Personal Protection Equipment (PPE).

IMPORTANT: Installers must follow regional requirements and/or company policies regarding SAFE WORK PRACTICES. The use of proper and adequate PPE is mandatory. When mounting this unit on a pole or at heights greater than 6 ft, adequate lift equipment must be used to decrease the possibility of a fall hazard.

y

Mechanical installation

This section describes the mechanical installation of the DGCM system. Dimensions for mounting and information on module withdrawal and insertion are included.

DIMENSIONS

The dimensions of the DGCM with and without external enclosure are shown below.


MECHANICAL INSTALLATION CHAPTER 2: INSTALLATION

Figure 2-1: DGCM Dimensions without External Enclosure

192.2mm (7.57”)

161.7mm (6.37”)

113.28mm(4.46”)

147.32mm(5.8”)


CHAPTER 2: INSTALLATION MECHANICAL INSTALLATION

Figure 2-2: DGCM Dimensions with Enclosure

PRODUCT IDENTIFICATION

The product identification label is located on the side panel of the DGCM. This label indicates the product model, serial number, firmware revision, and date of manufacture.

Figure 2-3: DGCM Label

MOUNTING ONLY THE DGCM

The standard panel mount and cutout dimensions are illustrated below.CAUTION: To avoid the potential for personal injury due to fire hazards, ensure the unit is

mounted in a safe location and/or within an appropriate enclosure.


MECHANICAL INSTALLATION CHAPTER 2: INSTALLATION

Figure 2-4: DGCM Standard panel mounting

Figure 2-5: Panel cutout dimensions

STANDARD PANEL MOUNTING

4xM4 SCREWS

PANEL CUTOUT DIMENSIONS

178mm

10

0m

m

Ø4,5mm

[0.177"]

[7"]

[3.9

3"]


CHAPTER 2: INSTALLATION ELECTRICAL INSTALLATION

Electrical installation

This section describes the electrical installation of the DGCM system. Terminal identification, and current, voltage and contact input information are included.


ELECTRICAL INSTALLATION CHAPTER 2: INSTALLATION

Figure 2-6: Typical wiring diagram

TERMINAL IDENTIFICATION

The connections for the DGCM terminal slots #1 and #2 are identified as shown in the figure below. The Terminal #1 slot can be a Rogowski, CT, or I/O module. Similarly, the Terminal #2 can be a Rogowski, CT, or I/O module.

89

17

06

.CD

R



Figure 2-7: Terminal Slot Labels

The figure below shows a DGCM device which has a Traditional CT module in slot #1 and I/O module in slot #2. This is a standard configuration

Figure 2-8: DGCM device - terminal identification

TERMINAL IDENTIFICATION SLOT #1

TERMINAL IDENTIFICATION SLOT #2

ROGOWSKI MODULE CT MODULE I/O MODULE

A

B

ROGOWSKI MODULE CT MODULE I/O MODULE

A

B

PHASE C SRC 3

PHASE C SRC 3

PHASE B SRC 3

PHASE B SRC 3

PHASE A SRC 3

PHASE A SRC 3

PHASE C SRC 2

PHASE C SRC 2

PHASE B SRC 2

PHASE B SRC 2

PHASE A SRC 2

PHASE A SRC 2

PHASE C SRC 1

PHASE C SRC 1

PHASE B SRC 1

PHASE B SRC 1

PHASE A SRC 1

PHASE A SRC 1

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

16OUT8

OUT7

OUT6

OUT5

OUT4

OUT3

OUT2

OUT1

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

16

17

18

INP13

INP12

INP11

INP10

INP9

COMMON-2

COMMON-1

INP8

INP7

INP6

INP14

INP15

INP16

INP5

INP4

INP3

INP2

INP1

1

3

5

7

9

11

13

15

17

19

21

23

25

27

PHASE A SRC1 (BLACK)

PHASE A SRC1 (GND)

PHASE B SRC1 (BLACK)

PHASE C SRC1 (BLACK)

PHASE C SRC1 (GND)



PHASE B SRC2 (GND)



PHASE A SRC3 (GND)



PHASE C SRC3 (GND)

2

4

6

8

10

12

14

16

18

20

22

24

26

28

PHASE A SRC1 (WHITE)

PHASE B SRC1 (GND)

PHASE B SRC1 (WHITE)

PHASE C SRC1 (WHITE)

PHASE A SRC2 (GND)



PHASE C SRC2 (GND)



PHASE B SRC3 (GND)



PHASE C SRC6

PHASE C SRC6

PHASE B SRC6

PHASE B SRC6

PHASE A SRC6

PHASE A SRC6

PHASE C SRC5

PHASE C SRC5

PHASE B SRC5

PHASE B SRC5

PHASE A SRC5

PHASE A SRC5

PHASE C SRC4

PHASE C SRC4

PHASE B SRC4

PHASE B SRC4

PHASE A SRC4

PHASE A SRC4

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

16OUT16

OUT15

OUT14

OUT13

OUT12

OUT11

OUT10

OUT9

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

16

17

18

INP29

INP28

INP27

INP26

INP25

COMMON-2

COMMON-1

INP24

INP23

INP22

INP30

INP31

INP32

INP21

INP20

INP19

INP18

INP17

1

3

5

7

9

11

13

15

17

19

21

23

25

27


PHASE A SRC4 (GND)



PHASE C SRC4 (GND)



PHASE B SRC5 (GND)



PHASE A SRC6 (GND)



PHASE C SRC6 (GND)

2

4

6

8

10

12

14

16

18

20

22

24

26

28


PHASE B SRC4 (GND)



PHASE A SRC5 (GND)



PHASE C SRC5 (GND)



PHASE B SRC6 (GND)



#2#1

VOLTAGE INPUTS

POWER SUPPLY

L

N

L1

L2

L3

N

GND

B(-)

A(+)



The figure below shows a DGCM device which has Rogowski (slot #1) and Rogowski (slot #2) modules chosen.

Figure 2-9: DGCM device - terminal identification

WIRE RANGE

Use the following guidelines when selecting wires or lugs to connect to terminal blocks.

CT and I/O Modules

Conductor cross section solid min. 0.2 mm²

Conductor cross section solid max. 1.5 mm²

Conductor cross section stranded min. 0.2 mm²

Conductor cross section stranded max. 2.5 mm²

Conductor cross section stranded, with ferrule without plastic sleeve min. 0.25 mm²

Conductor cross section stranded, with ferrule without plastic sleeve max. 1.5 mm²

Conductor cross section stranded, with ferrule with plastic sleeve min. 0.25 mm²

Conductor cross section stranded, with ferrule with plastic sleeve max. 1.5 mm²

Conductor cross section AWG/kcmil min. 24

Conductor cross section AWG/kcmil max 16

Minimum AWG according to UL/CUL 24

Maximum AWG according to UL/CUL 14

Power supply and Voltage inputs

Conductor cross section solid min. 0.2 mm²

Conductor cross section solid max. 2.5 mm²

Conductor cross section stranded min. 0.2 mm²

Conductor cross section stranded max. 2.5 mm²

Conductor cross section stranded, with ferrule without plastic sleeve min. 0.25 mm²

Conductor cross section stranded, with ferrule without plastic sleeve max. 2.5 mm²

Conductor cross section stranded, with ferrule with plastic sleeve min. 0.25 mm²

Conductor cross section stranded, with ferrule with plastic sleeve max. 2.5 mm²

Conductor cross section AWG/kcmil min. 24

Conductor cross section AWG/kcmil max 12

2 conductors with same cross section, solid min. 0.2 mm²

2 conductors with same cross section, solid max. 1 mm²



Phase sequence and transformer polarity

For correct operation of the relay features, the user must follow the instrument transformer polarities, shown in the Typical Wiring Diagram. Note the solid square markings shown with all instrument transformer connections. When the connections adhere to this drawing, the arrow shows the direction of power flow for positive watts and the positive direction of lagging vars. The phase sequence is user programmable for either ABC or ACB rotation.

Current inputs for the CT option

The DGCM has up to 18 channels for AC current inputs, each with an isolating transformer. There are no internal ground connections on the current inputs. Current transformers with 1 to 3000 A primaries may be used.

CAUTION: Verify that the relay’s nominal input current of 1 A or 5 A matches the secondary rating of the connected CTs. Unmatched CTs may result in equipment damage or inadequate protection

CAUTION: IMPORTANT: The phase and ground current inputs will correctly measure up to 2.5 times the current input’s nominal rating. Time overcurrent curves become horizontal lines for currents above the 2.5 × CT rating. This becomes apparent if the pickup level is set above the nominal CT rating

IMPORTANT: Do not remove CT terminal blocks or disconnect CT input wires when the CT phases are live. CT I/P terminals must be shorted externally or de-energized prior to any servicing

CAUTION: If the current input is from Rogowski coil, the phase and ground current inputs will correctly measure up to 1.5 times the current input’s nominal rating. Time overcurrent curves become horizontal lines for currents above the 1.5 × CT rating. This becomes apparent if the pickup level is set above the nominal sensor rating.

Voltage Inputs

The DGCM relay has three channels for AC voltage inputs. Two ranges are available, 0 to 300 Vac to be used with direct connection or through voltage transformers; or optional Low Energy Analog voltage inputs to be connected from voltage transducers.

Voltage transformers up to a maximum 10000:1 ratio may be used. The nominal secondary voltage must be in the 60 to 600 V range. The three phase inputs are designated as the “bus voltage”. The Bus VT connections most commonly used, wye and delta (or open delta), are shown in the Typical Wiring Diagram figure above.

2 conductors with same cross section, stranded min. 0.2 mm²

2 conductors with same cross section, stranded max. 1.5 mm²

2 conductors with same cross section, stranded, ferrules without plastic sleeve, min.

0.25 mm²

2 conductors with same cross section, stranded, ferrules without plastic sleeve, max.

1 mm²

2 conductors with same cross section, stranded, TWIN ferrules with plastic sleeve, min.

0.5 mm²

2 conductors with same cross section, stranded, TWIN ferrules with plastic sleeve, max.

1 mm²

Minimum AWG according to UL/CUL 30

Maximum AWG according to UL/CUL 12

Tightening torque, min 0.5 Nm

Tightening torque max 0.6 Nm

Power supply and Voltage inputs



Control powerCAUTION: Control power supplied to the relay must match the installed power supply range. If the

applied voltage does not match, damage to the unit may occur. All grounds MUST be connected for safe, normal operation regardless of control power supply type

The label found on the relay specifies its order code or model number. The installed power supply’s operating range will be one of the following:

• LO: 24 to 48 V DC (Range: 20 to 60 V DC)

• HI: 125 to 250 V DC/120 to 240 V AC (Range: 85 to 250 V DC/85 to 265 V AC)CAUTION: The relay should be connected directly to the ground bus, using the shortest practical

path. A tinned copper, braided, shielding and bonding cable should be used.

CAUTION: Isolate power prior to servicing.

Contact Inputs

External contacts can be connected to the relay’s digital inputs. These contacts are wet only.

CAUTION: Ensure correct polarity on contact input connections and do not connect any contact input circuits to ground or else relay hardware may be damaged.

A wet contact has one side connected to the positive terminal of an external DC power supply. The other side of this contact is connected to the required contact input terminal. In addition, the negative side of the external source must be connected to the relay’s DC negative rail.Two ranges are available:

• Low range (option Q): 20-60Vdc

• High range (option P): 100-265Vac

Figure 2-10: Wet contact connections

Output Relays

The DGCM is equipped with up to 16 electromechanical output relays designed for general purpose and with the possibility of being configured by the user.

WET CONTACT CONNECTION

V POWERSUPPLY

DC

WET CONTACTCONNECTION

A1

A2

A4

A3

A5

A7

A6

A9

A10

A12

A14

A13

A11

A8

A15

A17

A16

A18

DIG

ITA

LIN

PU

TS

INPUT 1

INPUT 2

INPUT 4

INPUT 3

INPUT 5

INPUT 7

INPUT 6

INPUT 9

INPUT 10

INPUT 12

INPUT 14

INPUT 13

INPUT 11

INPUT 8

INPUT 15

COMMON-1

INPUT 16

COMMON-2


CHAPTER 2: INSTALLATION DGCM FIELD RTU INSTALLATION GUIDE

DGCM Field RTU installation guide

This section provides information about the installation of the DGCM Field RTU device. This section is intended only for qualified, professional and skilled technicians, authorised to act in accordance with the safety standards provided for electrical installations. The person must have appropriate training and wear suitable Personal Protection Equipment (PPE).

IMPORTANT: Installers must follow regional requirements and or company policies regarding SAFE WORK PRACTICES. The use of proper and adequate PPE is mandatory. When mounting this unit on a pole or at heights greater than 6 ft adequate lift equipment must be used to decrease the fall hazard possibility.

Accessing the DGCM unitWhen a DGCM unit is shipped with the enclosure option, the top of the enclosure must be removed to access the DGCM unit.

Figure 2-11: DGCM mounted in Enclosure (no display)

There are four screws that must be removed before the top part of the enclosure can be separated from the bottom part.

IMPORTANT: To avoid unauthorized access the locking device must be added for in-field use.

Add Optional Padlock Device for Added Security

The option to add a padlock device to the enclosure is available. The padlock device is a padlock adaptor screw that is created specifically for use with a padlock. To add the padlock device, substitute one of the four screws with the padlock adaptor screw, shown in the figure below.


DGCM FIELD RTU INSTALLATION GUIDE CHAPTER 2: INSTALLATION

Figure 2-12: Padlock device option

Power supply and voltage inputs wiringCAUTION: Prior to servicing/commissioning ensure the Protective earth (PE) conductor is

connected to Earth Ground prior to conducting any work. In case of not having external enclosure, ensure that the protective earth (PE) terminal is suited with a recommended wire size of 14 AWG minimum.

The maximum pin torque for Power Supply and Voltage Input connectors is 0.6 Nm.

Figure 2-13: Protective Earth (PE) Terminal

Option for adding

security through a

padlock device



CAUTION: In case of having a blown fuse, substitution must be done only for trained people. Use only fuses with similar characteristics.

Rogowski inputsIMPORTANT: The connection and installation of the Rogowski coil must be carried out by qualified

technicians aware of the risks involved to the presence of voltage and current

Connect Rogowski coil cable

The Rogowski coil cable must be introduced through the cable entry system as shown in figure below.

Figure 2-14: Cable Entry System

Depending on the DGCM model, only slot #1 or slot #2 terminals are available for connecting Rogowski coils. In addition, each Rogowski module has terminals for three feeders. Three standard cables come from any Rogowski coil:

• Black

• White

• Shield

Black and white cables are the ones with the signal and must be connected to the terminals indicated as (Black) and (White) in the connector. Ground must be connected to the terminal marked with (GND).

Rogowski coil installation

IMPORTANT: Before installing the coil around a conductor that is not insulated, check that it is not powered.

Voltage inputs are fused with the following characteristics:

Rated Current [A]: 5 Amps

Rated Voltage [VAC]: 500 Vac

Breaking Capacity: 1500 A @ 500 Vac

Voltage Drop 1.0In typ [mV]: 135 mV

Power Dissipation 1.5In typ [mW]: 2.2 mW



IMPORTANT: Check if the coil is properly installed, an improper locking can affect measurement accuracy and the coil will become sensitive from adjacent conductors.

Follow these steps to install the Rogowski coil in the cable:Fit the coil around the conductor.Lock the coil using the locking mechanism. See figure below.Make sure that the arrow (indicating current direction in the coils) is in accordance with the flow current direction in the conductor.

Figure 2-15: Fit Rogowski coil around conductor

Setting Rogowski coil data

Sensor Correction factors must be set in DGCM according to Rogowski coil data. These correction factors are located in the calibration report attached to every coil. Settings for the sensor corrections in the DGCM are located in S2 System Setup / Current Setup / Current Source 1 (6). Follow these steps:

1. Once the Rogowski coil is installed around the conductor, take note of the Feeder and the Phase where the coil is placed.

2. Take the calibration data sheet corresponding to the installed coil. Check that the serial number placed in the coil corresponds with serial number shown in calibration report.

3. Using Enervista, enter the values for CT Magnitude and CT Phase Shift shown in the calibration report in the appropriate settings for DGCM. Check that the Feeder and phase corresponds to where the coil is installed. (CT1 corresponds to L1, CT2 corresponds to L2, and CT3 corresponds to L3).

Arrow indicating current

flow in conductor



FASTPATH: High Metering error can be introduced if incorrect calibration data is entered.


Multilin DGCM

Chapter 3: Interfaces

GEDigital Energy

Interfaces

The DGCM has the following communication and connection interfaces on its front panel.

Figure 3-1: Front panel interfaces

• LED indicators: see Settings chapter, Front Panel for more information

• RJ45 Ethernet port: see Introduction chapter, Specifications for more information

• USB serial port: see Introduction chapter, Specifications for more information

• RS485 serial port: see Introduction chapter, Specifications for more information

• Integrated cellular card

• SD card: note that this interface is available in Q4 of 2013.

• Cellular antenna

• Power supply: see Introduction chapter, Specifications for more information

• 3-phase voltage input: see Electrical Installation chapter, Installation for more information.


SOFTWARE SETUP CHAPTER 3: INTERFACES

Software setup

EnerVista DGCM Setup softwareAlthough settings can be entered manually using the control panel keys, a PC can be used to download settings through the communications port. The EnerVista DGCM Setup software is available from GE Digital Energy to make this as convenient as possible. With EnerVista DGCM Setup running, it is possible to:

• Program and modify settings

• Load and save setting files to and from a disk

• Read actual values

• Monitor status

• Read pre-trip data and event records

• Get help on any topic

• Upgrade the DGCM firmware

The EnerVista DGCM Setup software allows immediate access to all DGCM features with easy to use pull down menus in the familiar Windows environment. This section provides the necessary information to installEnerVista DGCM Setup , upgrade the relay firmware, and write and edit setting files.The DGCM software can run even if the DGCM is not connected to the computer. In this case, settings may be saved to a file for future use. If the DGCM communications are enabled, the DGCM addition, measured values, status and trip messages can be displayed on the actual value screens.

Hardware and software

requirements

The following requirements must be met for the EnerVista DGCM Setup software.

• Microsoft Windows™ 7 / XP is installed and running properly.

• At least 100 MB of hard disk space is available.

• At least 256 MB of RAM is available.

The EnerVista DGCM Setup software can be installed from either the GE EnerVista CD or the GE Digital Energy website at http://www.gedigitalenergy.com.

Installing the EnerVista DGCM

Setup software

After ensuring the minimum requirements indicated earlier, use the following procedure to install the EnerVista DGCM Setup software from the enclosed GE EnerVista CD.

1. Insert the GE EnerVista CD into your CD-ROM drive.

2. Click the Install Now button and follow the installation instructions to install the no-charge EnerVista software on the local PC.

3. When installation is complete, start the EnerVista Launchpad application.

4. Click the IED Setup section of the LaunchPad toolbar.


CHAPTER 3: INTERFACES SOFTWARE SETUP

5. In the EnerVista Launchpad window, click the Add Product button and select the DGCM Controller as shown below. Select the Web option to ensure the most recent software release, or select CD if you do not have a web connection, then click the Add Now button to list software items for the DGCM.

6. EnerVista Launchpad will obtain the latest installation software from the Web or CD and automatically start the installation process. A status window with a progress bar will be shown during the downloading process.

7. Select the complete path, including the new directory name, where the EnerVista DGCM Setup software will be installed.

8. Click on Next to begin the installation. The files will be installed in the directory indicated, the USB driver will be loaded into the computer, and the installation program will automatically create icons and add EnerVista DGCM Setup software to the Windows start menu.



9. The DGCM device (DA Setup) will be added to the list of installed IEDs in the EnerVista Launchpad window, as shown below.

If you are going to communicate from your computer to the DGCM Relay using the USB port:

10. Plug the USB cable into the USB port on the DGCM Relay then into the USB port on your computer.

11. Launch Enervista DA Setup from LaunchPad by double-clicking the DA Setup icon.

12. In EnerVista > Device Setup:



13. Select USB as the Interface type.

14. Select DGCM as the USB device.

Connecting EnerVista DGCM Setup to the device

Configuring serial communications

Before starting, verify that the cable is properly connected to either the USB port (for USB communications) or to the RS485 terminals (for RS485 communications). For RS485 communications, the Multilin F485 converter will be required. Refer to the F485 manual for additional details.

Figure 3-2: RS232-RS485 Convertor Connected to PC and DGCM

This example demonstrates a USB connection.

1. Install and start the latest version of the EnerVista DGCM Setup software (available from the GE Digital Energy web site). See the previous section for the installation procedure.

(-)

(+)(+)

(-)



2. Click on the Device Setup button to open the Device Setup window and click the Add Site button to define a new site.

3. Enter the desired site name in the "Site Name" field. If desired, a short description of the site can also be entered. In this example, we will use “Substation 1” as the site name.

4. The new site will appear in the upper-left list in the EnerVista DGCM Setup window.

5. Click the Add Device button to define the new device.

6. Enter the desired name in the "Device Name" field and a description (optional) of the device.

7. Select “Serial” from the Interface drop-down list. Note that the Slave address, COM Port, Baud Rate, Parity, Bits, and Stop Bits settings are configurable.

8. Click the Read Order Code button to connect to the DGCM device and upload the order code.

9. Click OK when the relay order code has been received. The new device will be added to the Site List window (or Online window) located in the top left corner of the main EnerVista DGCM Setup window.

The DGCM Site Device has now been configured for USB communications. Proceed to Connecting to the DGCM below, to begin communications.

Connecting to the relay using Ethernet

port

Connect to the DGCM through the Ethernet port as follows:

1. Remove the Ethernet cable from the DGCM. Connect an Ethernet cable from the DGCM to the PC (cross cable or direct cable in case of using switch or hub).

2. Run the EnerVista DA Setup software installed in the PC.

3. Click on the Device Setup button to open the Device Setup window and click the Add Site button to define a new site.

4. Enter the desired site name in the "Site Name" field. If desired, a short description of the site can also be entered. In this example we use “New Site 1” as the site name.

5. The new site appears in the upper-left list in the EnerVista DA Setup window.

6. Click the Add Device button to define the new device.



7. Enter the desired name in the "Device Name" field and a description (optional) of the device.

8. Select “Ethernet” from the Interface drop-down list.

9. The default DGCM IP Address is 192.168.1.100. The Slave Address is 254 and the Modbus Port is 502.

10. Click the Read Order Code button to connect to the DGCM device and upload the order code.

11. Click OK when the relay order code has been received. The new device is added to the Site List window (or Online window) located in the top left corner of the main EnerVista DA Setup window.

12. If the DGCM is connected to a cellular network through a modem, these steps can be followed to communicate with a PC connected to same network. In this case, the Ethernet cable must not be removed from the DGCM.

Using the quick connect feature

The Quick Connect button can be used to establish a fast connection through the front panel USB port of a DGCM DGC device. The following window will appear when the QuickConnect button is pressed:

As indicated by the window, the "Quick Connect" feature can quickly connect the EnerVista DGCM Setup software to a DGCM front port if a USB is selected in the interface drop-down list. Select a device and press the Connect button.



When connected, a new Site called “Quick Connect” will appear in the Site List window.

The DGCM DGC Device has now been configured via the Quick Connect feature for USB communications. Proceed to Connecting to the DGCM, below, to begin communications.

Connecting to the DGCM

Now that the communications parameters have been properly configured, the user can easily communicate with the device.

1. Expand the Site list by double clicking on the site name or clicking on the «+» box to list the available devices for the given site.

2. Desired device trees can be expanded by clicking the «+» box. The following list of headers is shown for each device:Device DefinitionActual ValuesSetpointsCommandsMaintenance.

3. Expand the SETPOINTS > S1 PRODUCT SETUP list item and double click on Front Panel to open the "Front Panel" settings window as shown below:



4. The "Front Panel" settings window will open with a corresponding status indicator on the lower left of the EnerVista DGCM Setup window.

5. If the status indicator is red, verify that the serial or USB cable is properly connected to the relay, and that the device has been properly configured for communications (steps described earlier).

The "Front Panel" settings can now be edited, printed, or changed. Other settings and command windows can be displayed and edited in a similar manner. "Actual Values" windows are also available for display. These windows can be arranged, and resized at will.

Working with settings and settings files

Engaging a device The EnerVista DGCM Setup software may be used in on-line mode (relay connected) to directly communicate with a DGC device. Communicating devices are organized and grouped by communication interfaces and into sites. Sites may contain any number of devices selected from the product series.

File support Opening any EnerVista DGCM Setup file will automatically launch the application or provide focus to the already opened application. If the file is a settings file (has a ‘DGC’ extension) which had been removed from the Settings List tree menu, it will be added back to the Settings List tree.New files will be automatically added to the tree.

Using settings files The EnerVista DGCM Setup software interface supports three ways of handling changes to DGCM settings:



• In off-line mode (DGC disconnected) to create or edit DGC settings files for later download to communicating DGC devices.

• Directly modifying DGC settings while connected to a communicating DGC device, then saving the settings when complete.

• Creating/editing settings files while connected to a communicating DGC device, then saving them to the device when complete.

Settings files are organized on the basis of file names assigned by the user. A settings file contains data pertaining to the following types of DGC settings:

• Device Definition

• Setup

• System Setup

• Control

Factory default values are supplied and can be restored after any changes.The EnerVista DGCM Setup displays DGC settings with the same hierarchy as the front panel display.

Downloading and saving settings files

Settings must be saved to a file on the local PC before performing any firmware upgrades. Saving settings is also highly recommended before making any settings changes or creating new settings files.The settings files in the EnerVista DGCM Setup window are accessed in the Files Window. Use the following procedure to download and save settings files to a local PC.

1. Ensure that the site and corresponding device(s) have been properly defined and configured as shown in Connecting EnerVista DGCM Setup to the DGCM, above.

2. Select the desired device from the site list.

3. Select the Online > Read Device Settings from Device menu item, or right-click on the device and select Read Device Settings to obtain settings information from the device.

4. After a few seconds of data retrieval, the software will request the name and destination path of the settings file. The corresponding file extension will be automatically assigned. Press Receive to complete the process. A new entry will be added to the tree, in the File pane, showing path and file name for the setting file.

Adding settings files to the environment

The EnerVista DGCM Setup software provides the capability to review and manage a large group of settings files. Use the following procedure to add an existing file to the list.



1. In the files pane, right-click on Files and select the Add Existing Setting File item as shown:

2. The Open dialog box will appear, prompting the user to select a previously saved settings file. As for any other MS Windows® application, browse for the file to be added then click Open. The new file and complete path will be added to the file list.

Creating a new settings file

The EnerVista DGCM Setup software allows the user to create new settings files independent of a connected device. These can be uploaded to a device at a later date. The following procedure illustrates how to create new settings files.

1. In the File pane, right click on File and select the New Settings File item. The following box will appear, allowing for the configuration of the settings file for the correct firmware version. It is important to define the correct firmware version to ensure that settings not available in a particular version are not downloaded into the device.



2. Select the Firmware Version, and Order Code options for the new settings file.

3. For future reference, enter some useful information in the Description box to facilitate the identification of the device and the purpose of the file.

4. To select a file name and path for the new file, click the button beside the File Name box.

5. Select the file name and path to store the file, or select any displayed file name to replace an existing file. All DGCM settings files should have the extension ‘DGC’ (for example, ‘feeder1.DGC’).

6. Click OK to complete the process. Once this step is completed, the new file, with a complete path, will be added to the EnerVista DGCM Setup EnerVista DGCM Setup software environment.

Upgrading settings files to a new revision

It is often necessary to upgrade the revision for a previously saved settings file after the DGCM firmware has been upgraded. This is illustrated in the following procedure:

1. Establish communications with the DGCM relay.

2. Select the Maintenance > M1 Product Info menu item and record the Firmware Revision.

3. Load the settings file to be upgraded into the EnerVista DGCM Setup environment as described in the section, Adding Settings Files to the Environment.

4. In the File pane, select the saved settings file.

5. From the main window menu bar, select the Offline > Edit Settings File Properties menu item and note the File Version of the settings file. If this version is different from the Firmware Revision noted in step 2, select a New File Version that matches the Firmware Revision from the pull-down menu.

6. For example, if the firmware revision is 1.20 and the current settings file revision is 1.10, change the settings file revision to “1.2x”.

7. Enter any special comments about the settings file in the "Description" field.

8. Select the desired firmware version from the "New File Version" field.

9. When complete, click OK to convert the settings file to the desired revision. See Loading Settings from a File below, for instructions on loading this settings file into the DGCM deviceDGCM .



Printing settings and actual values

The EnerVista DGCM Setup EnerVista DGCM Setup software allows the user to print partial or complete lists of settings and Actual Values. Use the following procedure to print a list of settings:

1. Select a previously saved settings file in the File pane or establish communications with a DGCM device.

2. From the main window, select the Offline > Export Settings File menu item.

3. The Print/Export Options dialog box will appear. Select Settings in the upper section and select either Include All Features (for a complete list) or Include Only Enabled Features (for a list of only those features which are currently used) in the filtering section and click OK.

4. The process for Offline > Print Preview Settings File is identical to the steps above.

5. Settings lists can be printed in the same manner by right clicking on the desired file (in the file list) or device (in the device list) and selecting the Print Device Information or Print Settings File options.

Printing actual values from a connected

device

A complete list of actual values can also be printed from a connected device with the following procedure:

1. Establish communications with the desired DGCM device.

2. From the main window, select the Online > Print Device Information menu item



3. The Print/Export Options dialog box will appear. Select Actual Values in the upper section and select either Include All Features (for a complete list) or Include Only Enabled Features (for a list of only those features which are currently used) in the filtering section and click OK.

Actual Values lists can be printed in the same manner by right clicking on the desired device (in the device list) and selecting the Print Device Information option.

Loading settings from a file

FASTPATH: The following procedure illustrates how to load settings from a file. Before loading a settings file, it must first be added to the EnerVista DGCM Setup environment as described in the section, Adding Settings Files to the Environment.

1. Select the previously saved settings file from the File pane of the EnerVista DGCM Setup software main window.

2. Select the Offline > Edit Settings File Properties menu item and verify that the corresponding file is fully compatible with the hardware and firmware version of the target device. If the versions are not identical, see Upgrading Settings Files to a New Revision for details on changing the settings file version.

3. Right-click on the selected file and select the Write Settings File to Device item.

4. Select the target device from the list of devices shown and click Send. If there is an incompatibility, an "Incompatible device..." error message will be shown.

An error message will occur when attempting to download a settings file with a revision number that does not match the relay firmware. If the firmware has been upgraded since saving the settings file, see for instructions on changing the revision number of a settings file. If there are no incompatibilities between the target device and the settings file, the data will be transferred to the device. An indication of the percentage completed will be shown in the bottom of the main window.

Upgrading DGCM firmwareTo upgrade the DGCM firmware, follow the procedures listed in this section. Upon successful completion of this procedure, the DGCM device will have new firmware installed with the factory default settings. The latest firmware files are available from the GE Digital Energy website at http://www.digitalenergy.com.Select the appropriate upgrade mechanism for your configuration:

• If EnerVista DGCM Setup software is connected to a local DGCM device, choose MAINTENANCE > UPDATE FIRMWARE as described in Loading new DGC firmware locally.

• If EnerVista DGCM Setup software is communicating with a DGCM device through cellular or Ethernet communications, choose MAINTENANCE > UPDATE FIRMWARE BY TFTP as described in Loading new DGC firmware using TFTP.

FASTPATH: EnerVista DGCM Setup software prevents incompatible firmware from being loaded into a DGCM device.

FASTPATH: Before upgrading firmware, it is important to save the current DGCM settings to a file on your PC. After the firmware has been upgraded, it is necessary to load this file back into the device. Refer to Downloading and Saving Settings Files for details on saving settings to a file.



Loading new DGC firmware locally

Loading new firmware into the DGCM flash memory from a local PC is accomplished as follows:

1. Connect the device to the local PC and save the settings to a file as shown in Downloading and Saving Settings Files.

2. Select the MAINTENANCE > UPDATE FIRMWARE menu item.

3. The EnerVista DGCM Setup software will request the new firmware file. Locate the folder that contains the firmware files to load into the relayDGCM . The firmware filename has the following format:

4. EnerVista DGCM Setup EnerVista DGCM Setup software now prepares the DGCM to receive the new firmware file. The DGCM front panel momentarily displays "DGC BOOT PROGRAM Waiting for Message,” indicating that it is in upload mode.

5. While the file is being loaded into the DGCM device, a status box appears showing how much of the new firmware file has been transferred, and the upgrade status. The entire transfer process takes a few minutes.

6. The EnerVista DGCM Setup software will notify the user when the DGCM EnerVista DGCM Setup program has finished loading the file. Carefully read any displayed messages and click OK to return the main screen. Cycling power to the relay is recommended after a firmware upgrade.

After successfully updating the DGCM firmware, the device will not be in service and will require settings programming. To communicate with the relay, the communication settings may have to be manually reprogrammed.When communications are established, the saved settings must be reloaded back into the device. See Loading Settings from a File for details.Modbus addresses assigned to firmware modules, features, settings, and corresponding data items (i.e. default values, min/max values, data type, and item size) may change slightly from version to version of the firmware.Addresses are rearranged when new features are added or existing features are enhanced or modified.

Loading new DGC firmware using TFTP

Loading new firmware into the DGCM flash memory from a TFTP server is accomplished as follows:

1. Confirm that you are using a modem or Ethernet communications to connect EnerVista DGCM Setup software to the DGCM device.

MJ M03 M A 100 . 000

Modification Number (000 = none)

Board Assembly Rev #

Code Type in Memory Device

PCB Code Number

Product Reference Code (MJ = DGC)

Firmware Rev #



2. Check that a TFTP server is installed on the PC hosting the EnerVista DGCM Setup software.

3. Copy the new firmware file to the same folder as the TFTP server (where the .exe file is located). The firmware filename has the following format:

4. Ensure TFTP is enabled (S1 PRODUCT SETUP > COMMUNICATIONS > TFTP).

5. Connect the device to the local PC and save the settings to a file as shown in Downloading and Saving Settings Files.

6. Select the MAINTENANCE > UPDATE FIRMWARE BY TFTP menu item.

7. When prompted, enter the IP address of the TFTP server, and the firmware filename.

Click OK to start the TFTP file transfer.

8. File transfer status can be viewed though the TFTP server software. The transfer can take a few minutes (Ethernet) or over an hour. Cycling power to the relay is recommended after a firmware upgrade.

After successfully updating the DGCM firmware, the device will not be in service and will require settings programming. To communicate with the relay, the communication settings may have to be manually reprogrammed.When communications are established, the saved settings must be reloaded back into the device. See Loading Settings from a File for details.Modbus addresses assigned to firmware modules, features, settings, and corresponding data items (i.e. default values, min/max values, data type, and item size) may change slightly from version to version of the firmware.Addresses are rearranged when new features are added or existing features are enhanced or modified.

Advanced EnerVista DGCM Setup features

Event records The EnerVista DGCM Setup EnerVista DGCM Setup software can be used to capture events from the device at the instance of a pickup, trip, alarm, or other condition.

MJ M03 M A 100 . 000

Modification Number (000 = none)

Board Assembly Rev #

Code Type in Memory Device

PCB Code Number

Product Reference Code (MJ = DGC)

Firmware Rev #



• With EnerVista DGCM Setup EnerVista DGCM Setup software running and communications established, select the Actual Values > A3 Records > Event Records menu item to open the Event Records Viewer window.

• Click on the Save Events button to save the selected events to the local PC.

Data logger The data logger feature is used to sample and record up to ten actual values at a selectable interval. The datalogger can be run with Continuous mode Enabled, which will continuously record samples until stopped by the user; or with Continuous mode Disabled, which will trigger the datalog once without overwriting previous data.Viewing and saving of the Datalogger is performed as follows:

1. With EnerVista DGCM Setup running and communications established, select the A3 Records > Data Logger menu item to open the datalog setup window:



2. If Continuous mode is enabled, click on Stop to stop the datalog

3. Click on the Save to File button to save the datalog to the local PC. A new window will appear requesting for file name and path.

4. One file is saved as a COMTRADE file, with the extension ‘CFG’. The other file is a DAT file, required by the COMTRADE file for proper display of data.

5. To view a previously saved COMTRADE file, click the Open button and select the corresponding COMTRADE file.

6. To view the datalog, click the Launch Viewer button. A detailed Datalog window will appear as shown below.



7. The datalog can be set to capture another buffer by clicking on Run (when Continuous mode is enabled), or by clicking on Release (when Continuous mode is disabled).

Display graph valuesat the correspondingcursor line. Cursorlines are identified bytheir colors.

CURSORLINESTo move lines locate the mouse pointerover the cursor line then click and dragthe cursor to the new location.

DELTAIndicates time differencebetween the two cursor lines

TRIGGER LINE

Indicates thepoint in time forthe trigger

FILE NAME

Indicates thefile name andcomplete path(if saved)

TRIGGER TIME & DATE

Display the time & date of theTrigger

VECTOR DISPLAY SELECT

Click here to open a new graphto display vectors

CURSOR LINE POSITION

Indicate the cursor line positionin time with respect to thetrigger time


Multilin DGCM

Chapter 4: Actual values

GEDigital Energy

Actual values

This chapter describes the Actual Values setting for the DGCM which includes A1 Status, A2 Metering, and A3 Recording Functionality.

A1 Status

The main A1 Status menu screen is shown below:

ClockThe A1 Status includes a clock that performs time stamping for various A1 Status values. The current date and time values are read-only and cannot be set.PATH: ACTUAL VALUES > A1 STATUS > CLOCK


A1 STATUS CHAPTER 4: ACTUAL VALUES

CURRENT DATEMay 8 2013

Range: Date in format shown

Indicates today’s date.

CURRENT TIME14:25:50

Range: Time in format shown

Indicates the current time of day.

Modem actual valuesThe status of the internal cellular Modem is shown in the status screen, as shown. The parameters displayed are SIM Status, Signal Level, Network Registration, and Connection status, IP Address, Version, IMSI and IMEI.

FASTPATH: The internal modem settings screen is hidden in the offline file.

PATH: ACTUAL VALUES > A1 STATUS > MODEM

SIM STATUSRange: 0-Ready, 1-PIN required, 2-PUK required, 3-ErrorDefault: 3-Error

This value provides information about the status of the SIM card, such as if there is an error, or the PIN code is needed.


CHAPTER 4: ACTUAL VALUES A1 STATUS

SIGNAL LEVEL (RSSI)Range: 0 to 31, 99Default: 99 (no signal)

The RSSI value gives the signal strength received in dBm.

NETWORK REGISTRATIONRange: No, YesDefault: No

The Network Registration status indicates whether the internal modem is registered to the network.

Possible causes for not being registered are the following:

– Poor signal strength. Check that the antenna is properly connected and experiment with different locations.

– A problem with the SIM card. Ensure that the SIM card is enabled with the network provider.

CONNECTION STATUSRange: Disconnected, ConnectingDefault: Disconnected

If the Connection Status does not show as “Connected”, check for the following:

– The function parameter is set to “Enabled”.

– A problem with the APN, username or password, if showing continuously “Connecting”.

IP ADDRESSRange: 000.000.000.000Default: 000.000.000.000

The value shown is the IP address assigned by the network operator.

VERSIONRange: xx.xx.xxxDefault: 13.00.002

The version shown is the firmware version of the internal modem.

IMSIRange: 15 numbers

The IMSI shown is the International Mobile Subscriber Identity stored in the SIM.

IMEIRange: 15 or 16 numbers

This is the Product Serial Number Identification. It is identified as the mobile IMEI.

INTERNAL MODEM CONNECTION TYPERange: 0-None, 1-GPRS, 2-3GDefault: 0-None

This value indicates the type of connection with the cellular network.

Contact inputsThe state of all active contact inputs is displayed here. PATH: ACTUAL VALUES > A1 STATUS > CONTACT INPUTS


A1 STATUS CHAPTER 4: ACTUAL VALUES

CONTACT INPUTS 1 to 32OFF

Range: Off, On

Contact outputsThe state of all active contact outputs is displayed here. PATH: ACTUAL VALUES > A1 STATUS > CONTACT OUTPUTS

CONTACT INPUTS 1 to 32OFF

Range: Off, On

Virtual inputsThe state of all active virtual inputs is displayed here. PATH: ACTUAL VALUES > A1 STATUS > VIRTUAL INPUTS


CHAPTER 4: ACTUAL VALUES A1 STATUS

VIRTUAL INPUTS 1 to 32OFF

Range: Off, On

Virtual outputsThe state of all active virtual outputs is displayed here. PATH: ACTUAL VALUES > A1 STATUS > VIRTUAL OUTPUTS


A2 METERING CHAPTER 4: ACTUAL VALUES

VIRTUAL OUTPUTS 1 to 32OFF

Range: Off, On

Flexlogic summaryPATH: ACTUAL VALUES > A1 STATUS > FLEXLOGIC SUMMARY

The screen shown indicates both the Flexlogic status and the number of lines used to design the specific Flexlogic function.

A2 Metering

The DGCM provides a high amount of data measurements from feeders. This device is designed to collect and measure the maximum number of parameters of the LV feeders for statistical, control, and some protection/detection applications.The DGCM is programmed internally to capture samples from current and voltage sensors at a frequency rate of 64 samples per power system cycle.Detection functions and the metering task are executed two times per power cycle. In addition, the actual values related to statistical analysis are taken at a sampling rate of 1 sample/second.The main status metering menu is shown below:

Current source 1 (6)PATH: ACTUAL VALUES > A2 METERING > CURRENT SOURCE 1 (6)

The DGC Monitoring Device measures and computes the following electrical quantities.


CHAPTER 4: ACTUAL VALUES A2 METERING

The following screen captures list the parameter values available for viewing from each current source.

Current The individual DFT phase current and phase angle quantities are shown for each current source available. The screen capture below shows current values from Current Source 1.

Sequence The individual sequence (l1, l2, l0) and sequence angle quantities are shown for each source available. The screen capture below shows sequence values from Current Source 1.

Total harmonic distortion (THD)

The individual total harmonic distortion quantities are shown for each source. The screen capture below is taken from Current Source 1.



Power Specific power (real, reactive and apparent) quantities and factors for computing these values are shown for each source available. The screen capture below shows power values from Current Source 1.

A2 POWER (1/6) Value Description

Phase A Active Power 0.0 W Phase A Real Power

Phase A Reactive Power 0.0 VAr Phase A Reactive Power

Phase A Apparent Power 0.0 VA Phase A Apparent Power

Phase A PF 0.0 Phase A Power Factor

Phase B Active Power 0.0 W Phase B Real Power

Phase B Reactive Power 0.0 VAr Phase B Reactive Power

Phase B Apparent Power 0.0 VA Phase B Apparent Power

Phase B PF 0.0 Phase B Power Factor

Phase C Active Power 0.0 W Phase C Real Power

Phase C Reactive Power 0.0 VAr Phase C Reactive Power



Energy Energy quantities and measured values are shown for each source available. The screen capture below shows quantities obtained from Current Source 1.

Power quantity statistics

The sampled statistical values are shown for each source available. The screen capture below shows measurements obtained from Current Source 1.

Phase C Apparent Power 0.0 VA Phase C Apparent Power

Phase C PF 0.0 Phase C Power Factor

Three Phase Active Power 0.0 W Three Phase Real Power

Three Phase Reactive Power 0.0 VAr Three Phase Reactive Power

Three Phase Apparent Power 0.0 VA Three Phase Apparent Power

Power Factor 0.0 Power Factor

A2 POWER (1/6) Value Description



BusIf all feeders are located at the LV side and programmed as LV outgoing Side, these registers provide the sum of all currents of the outgoings feeders per phases.PATH: ACTUAL VALUES > A2 METERING > BUS 1 (2)

The screen captures shown below list the parameter values available for viewing from each bus. The screen captures show the values taken from Bus 1.PATH: ACTUAL VALUES > A2 METERING > BUS 1 (2) > CURRENT



PATH: ACTUAL VALUES > A2 METERING > BUS 1 (2) > SEQUENCE

PATH: ACTUAL VALUES > A2 METERING > BUS 1 (2) > POWER

PATH: ACTUAL VALUES > A2 METERING > BUS 1 (2) > ENERGY



PATH: ACTUAL VALUES > A2 METERING > BUS 1 (2) > POWER QUANTITY STATISTICS

Voltage sourcePATH: ACTUAL VALUES > A2 METERING > VOLTAGE SOURCE 1 (2)



PATH: ACTUAL VALUES > A2 METERING > VOLTAGE SOURCE 1 (2) > VOLTAGES

ACTUAL VALUES > A2 METERING > VOLTAGE SOURCE 1 (2) > SEQUENCE

ACTUAL VALUES > A2 METERING > VOLTAGE SOURCE 1 (2) > THD



ACTUAL VALUES > A2 METERING > VOLTAGE SOURCE 1 (2) > POWER QUANTITY STATISTICS

FrequencyPATH: ACTUAL VALUES > A2 METERING > FREQUENCY

FREQUENCY0.00 Hz

Range: 40.00 to 70.00 Hz

Power calculationWhen the DGCM is connected to all three-phase currents and voltages, the three-phase power is calculated as a sum of the three individual phase power quantities.



Refer to the following diagram showing the three-phase power computation for each combination of voltage and current input that is programmable under the Voltage and Current sensing setup menus:

Figure 4-1: DGC Power Calculation

For all equations below, the rotated phasor is the current phasor. The asterisk identifies conjugate value.0) Three phase based on one phase calculation

1) Three phase based on one phase calculation





6) Three phase direct calculation

7) Aron method

Examples:A. VT connected between Phase A and B, VT = VAB. Current input from phase C: IC. Test voltage and current values:

From the table, equation # 4 will be applied:

1- The current phasor is rotated by –90 degrees.

Therefore the active and reactive power are calculated as follows:2-

3-


A3 RECORDS CHAPTER 4: ACTUAL VALUES

B. Vt connected to phase C: VT = Vc . Current input from phase A: IA.Test voltage and current values:

From the table, equation # 2 will be applied:

4- The current phasor is rotated by –240 degrees.

5-

6-

A3 Records

Figure 4-2: Records menu structure

Event recordsEvent Records include events generated by operation of the following functions:

• Control functions

• Alarms, Blocks

• Change of inputs.

The events are stored in memory, which can store up to 1024 events. Each event is stored with an event number, date, time, and analog data of interest. The following screen capture shows the analog data viewable for each recorded event.


CHAPTER 4: ACTUAL VALUES A3 RECORDS

Data loggerThe data logger is used to sample and record actual values at a selectable time interval. The stored actual values are chosen according to the user’s criteria. For a list of available settings, refer to Chapter 5: Settings / S1 Product Setup / Data Logger.

VDI sagThe VDI Sag records are used to record actual values of voltage sag events. Voltage sag events are determined according to the device configuration. For a list of available settings, refer to Chapter 5: Settings / S3 Configuration / Voltage Alarms / Voltage Disturbance Indicators.


A3 RECORDS CHAPTER 4: ACTUAL VALUES

VDI swellThe VDI Swell records are used to record actual values of voltage swell events. Voltage swell events are determined according to the device configuration. For a list of available settings, refer to Chapter 5: Settings / S3 Configuration / Voltage Alarms / Voltage Disturbance Indicators.


Multilin DGCM

Chapter 5: Setpoints

GEDigital Energy

Setpoints

This chapter describes the Settings for the DGCM which includes S1 Status, S2 Metering, S3 Configuration, S4 Controls, S5 Inputs/Outputs, and the FlexLogic™ tool.

Refer to the DGCM Communications Guide for details of the Modbus User Map.

S1 Product setup

The main Product Setup menu screen is shown below.


S1 PRODUCT SETUP CHAPTER 5: SETPOINTS

Clock setupThe DGCM has an internal real time clock that performs time stamping for various features such as the event and transient recorders.Time synchronization priority uses Modbus or DNP commands as follows:Synchronization commands are all eventually translated into a MODBUS function, and as such are blocked from the MODBUS layer as required.There is no prioritization amongst synchronization commands. A synchronization command issued from DNP for example, can be directly followed by another from MODBUS, for example.PATH: SETPOINTS > S1 PRODUCT SETUP > CLOCK SETUP

DATE: (MM/DD/YYYY)Range: Month: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sept, Oct, Nov, Dec / Day: 1 to 31 / Year: 2009 to 2099Default: Jan 15 2009

This setting sets the date in the specified format.

TIME: (HH:MM:SS)Range: 0 to 23: 0 to 59: 0 to 59Default: 03:15:50

This setting sets the time in the specified format.


CHAPTER 5: SETPOINTS S1 PRODUCT SETUP

DAYLIGHT SAVINGS ENABLERange: Disabled, EnabledDefault: Disabled

This setting enables the DLS command.

PATH: SETPOINTS > S1 PRODUCT SETUP > CLOCK SETUP > [Daylight Savings Enabled]

DLS START MONTH:Range: Not Set, January, February, March, April, May, June, July, August, September, October, November, DecemberDefault: Not Set

This setting sets the month for the DLS start time.

DLS START WEEK:Range: Not Set, 1st, 2nd, 3rd, 4th, LastDefault: Not Set

This setting sets the week of the month for the DLS start time.

DLS START WEEKDAY:Range: Not Set, Mon, Tue, Wed, Thu, Fri, Sat, SunDefault: Not Set

This setting sets the weekday for the DLS start time.

DLS END MONTH:Range: Not Set, January, February, March, April, May, June, July, August, September, October, November, DecemberDefault: Not Set

This setting sets the month for the end of the DLS time.

DLS END WEEK:Range: Not Set, 1st, 2nd, 3rd, 4th, LastDefault: Not Set

This setting sets the week of the month for the end of the DLS time.

DLS END WEEKDAY:Range: Not Set, Mon, Tue, Wed, Thu, Fri, Sat, SunDefault: Not Set

This setting sets the weekday for the end of the DLS time.

SNTPThe DGCM supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the DGCM can obtain clock time over an Ethernet network. The DGCM acts as an SNTP client to receive time values from an SNTP/NTP server, usually a dedicated product using a GPS receiver to provide an accurate time.To use SNTP, the SNTP IP ADDR must be set. Once the address is set and SNTP FUNCTION is “Enabled”, the DGCM attempts to obtain time values from the SNTP/NTP server. Since many time values are obtained and averaged, it generally takes three to four minutes until the DGCM clock is closely synchronized with the SNTP/ NTP server. It may take up to two minutes for the DGCM to signal an SNTP self-test error if the server is offline.

Password securityThe DGCM has password security features that are designed into the device to provide protection against unauthorized setting changes and control.



The DGCM has programmable passwords for access, which can be used to allow settings changes and command execution from the communications ports. Two levels of password security are provided on the DGCM: Settings and Controls. These levels of operation can be accessed either locally (Local passwords) through the front panel and the USB port, or remotely (Remote passwords) via the RS485, Ethernet and cellular ports. These passwords consist of 3 to 10 alphanumeric characters. The user can have either Setpoint or Control Level active, but not both simultaneously from the same interface.Higher rights are assigned to remote access. While using the EnerVista PC program, the remote user can overwrite the local passwords or can reset all local and remote passwords. For resetting the passwords, the remote user must enter a valid Master Password. The Master Reset Password must be 8 to 10 characters in length, and must contain at least two letters and two numbers. Ethernet, RS485, and GPRS ports share the same passwords (Local/Remote). The front panel and USB port share the same passwords (Local/Remote).The Master Level is used for the setting and resetting of passwords, and includes all Settings and Control Level access rights.In general, any command given to the DGCM by the user requires entering a controls password.Operations available under the CONTROLS password includes:

• Reset and Clear (statistics) commandsVirtual Input commandsClearing of event records, Data Logger, and other dataUploading new firmwareChanging the Local or Remote Control Password, depending on the interface being accessed.

Any DGCM feature associated with a menu of setting points where the user can permanently set the control or alarm conditions requires a valid SETPOINTS password.Operations available under the SETPOINTS password include:

• Changing settings available under the SETPOINTS menu. This excludes the features that require a CONTROLS password, as listed above.

• Changing any setting under MAINTENANCE such as DGCM maintenance settings. This excludes the features that require a CONTROLS password, as listed above.

After local or remote password entry, the access level is maintained until a period of 5 minutes of inactivity has elapsed, after which the password must be re-entered. A power loss or entering the wrong password logs the user out of security

PATH: SETPOINTS > S1 PRODUCT SETUP > PASSWORD SECURITY

MASTER PASSWORDRange: 8 to 10 alpha-numeric characters

SETTINGS PASSWORDRange: 3 to 10 alpha-numeric characters



CONTROL PASSWORDRange: 3 to 10 alpha-numeric characters

CommunicationsThe Communications screen is shown below.

RS485 interface The DGCM is equipped with one serial RS485 communication port. The RS485 port has settings for baud rate and parity. It is important that these parameters agree with the settings used on the computer or other equipment that is connected to these ports. This port may be connected to a computer running the EnerVista DGCM Setup software. This software can download and upload setting files, view measured parameters, and upgrade the device firmware. A maximum of 32 DGCM-series devices can be daisy-chained and connected to a DCS, PLC, or PC using the RS485 port.Select the SETPOINTS > S1 PRODUCT SETUP > COMMUNICATIONS > RS485 path in the program, to configure the serial port.

Figure 5-1: Serial port configuration settings

The following settings are available to configure the RS485 port.



RS485 BAUD RATERange: 9600, 19200, 38400, 57600, 115200Default: 115200

This setting specifies the baud rate (bits per second) for the RS485 port.

RS485 PARITYRange: None, Odd, EvenDefault: None

This setting specifies the parity for the RS485 port.

REAR 485 PORT PROTOCOLRange: Modbus, DNP3Default: Modbus

This setting specifies the rear 485 port protocol for the RS485 port.FASTPATH: The DGCM must be power cycled after changing this RS485 setting.

COMMUNICATIONS FAILURE ALARMRange: OFF, 5s to 25sDefault: OFF

This setting gives the communication failure alarm after the specified time delay.

Ethernet interface The DGCM is equipped with one Ethernet communication port. The Ethernet port has settings for IP address, Subnet IP address and Gateway address. The IP addresses are used with the DNP and Modbus/TCP protocols.Select the SETPOINTS > S1 PRODUCT SETUP > COMMUNICATIONS > ETHERNET menu item in the EnerVista DGCM Setup program to configure the Ethernet port.

The following settings are available to configure the Ethernet port.

ETHERNET IP ADDRESSRange: Standard IP Address formatDefault: 192.168.1.100

This Ethernet port setting sets the IPV4 address in the IPV4 format.

ETHERNET SUBNET MASKRange: Standard IP Address formatDefault: 255.255.255.0

Use this setting to set the port's IPV4 address in the IPV4 format.



ETHERNET GATEWAY ADDRESSRange: Standard IP Address formatDefault: 0.0.0.0

This setting sets the port's IPV4 address in the IPV4 format.

Cellular modem settings

The DGCM supports an internal modem. In order to configure and monitor the internal modem, the following settings and status are available.Select the SETPOINTS > S1 PRODUCT SETUP > COMMUNICATIONS > MODEM path to set up the cellular modem protocol as shown below.

Figure 5-2: Modem protocol configuration settings

The following Modem settings are available:

FUNCTIONRange: Disable, EnableDefault: Disable

This setting enables or disables the internal modem. If the modem is disabled then it is in the OFF state without consumption and emissions.

ENTER PINRange: No, YesDefault: No

The SIM card has a PIN associated with it . If this setting is enabled then the application will try to set the PIN to gain access to the SIM.

SIM PINRange: **** (0000-9999)Default: *

This is the PIN number associated with the introduced SIM card. This PIN number must be encrypted.

APNRange: N/ADefault: e.g., ac.vodafone.es

The Access Point Name specifying the APN is used when establishing a data session with the GSM-based network. The APN often determines how the user will be billed for their network usage and whether the user has access to the Internet or just a provider-specific walled-garden, so it is important to use the correct APN for the user's mobile



broadband plan. APNs roughly follow the same rules as DNS domain names. The APN may only be composed of the characters “A-Z”, “a-z”, “0-9”, “.”, and “-“as per GSM 03.60 Section 14.9.

AUTHENTICATIONRange: 0–None, 1–PAP, 2–CHAPDefault: 0–None

This setting defines the authentication protocol to be used when accessing the network. There are three possibilities: None, PAP, and CHAP.

PAP is used by Point-to-Point Protocol to validate users before allowing them access to server resources. PAP transmits unencrypted ASCII passwords over the network and is therefore considered unsecured. It is used as a last resort when the remote server does not support a stronger authentication protocol, like CHAP. CHAP is an authentication scheme used by PPP servers to validate the identity of remote clients. CHAP periodically verifies the identity of the client by using a three-way handshake. This happens at the time of establishing the initial link (LCP), and may happen again at any time afterwards. The verification is based on a shared secret (such as the client user's password).

USERRange: ********Default: ********

The Name field is one or more octets representing the identification of the system transmitting the packet. There are no limitations on the content of this field, it may contain any ASCII character.

PASSWORDRange: ********Default: (Encrypted)

The Password is the second parameter needed for the authentication process. It may also contain any ASCII character. It must be encrypted.

PINGRange: Disable, EnableDefault: Disable

This setting allows the ICMP protocol to be used to discover the device on the network. By default it is disabled protecting the device from remote attacks.

NETWORK INITIALIZATION TIMEOUTRange: 5s to 600sDefault: 30s

This setting establishes the network registration, attachment and initialization timeout.

CONNECTION TIMEOUTRange: 5s to 600sDefault: 45s

This setting specifies the time in seconds to allow for a connection to be established. This includes the context activation, the PPP negotiation and authentication process timeout.

CONNECTION PINGRange: Enable, DisableDefault: Disable

This setting provides a keep-alive communications mechanism, enabling ongoing connection pings as detailed in the ping settings that follow. If no response is received from any configured ping IP addresses for the configured number of PING RETRIES, the DGCM resets the internal modem and reconnects to the network.



PING IP1Range: 000.000.000.000Default: 000.000.000.000

This setting specifies the first IP address to ping.

PING IP2Range: 000.000.000.000Default: 000.000.000.000

This setting specifies the second IP address to ping.

PING INTERVALRange: 5s to 3600sDefault: 60s

This is the interval between ping connections attempts by the to the DGCM to the configured ping IP addresses.

PING TIMEOUTRange: 10s to 300sDefault: 60s

This specifies the time the DGCM waits for a response to a ping connections attempt before concluding the ping command has failed.

PING MAX RETRIESRange: 1 to 10Default: 5

This specifies the number of unsuccessful ping connection attempts made before theDGCM resets the internal modem and reconnects to the network.

Modbus The Modicon Modbus protocol is supported by the DGCM. Modbus is available via the RS485 serial link (Modbus RTU). The DGCM always acts as a slave device, meaning that it never initiates communications; it only listens and responds to requests issued by a master device. A subset of the Modbus protocol format is supported that allows extensive monitoring, programming, and control functions using read and write register commands. Refer to the DGCM Communications Guide for additional details on the Modbus protocol and the Modbus memory map.The Modbus server can simultaneously support two clients over serial RS485. The server is capable of reporting any indication or measurement and operating any output present in the device. A user-configurable input and output map is also implemented.The DGCM operates as a Modbus slave device onlySelect the SETPOINTS > S1 PRODUCT SETUP > COMMUNICATIONS > MODBUS menu item in software to set up the modbus protocol as shown below.

The following Modbus settings are available:



MODBUS SLAVE ADDRESSRange: 1 to 254 in steps of 1Default: 254

This setting specifies the Modbus slave address. Each device must have a unique address from 1 to 254. Address 0 is the broadcast address to which all Modbus slave devices listen. Addresses do not have to be sequential, but no two devices can have the same address or conflicts resulting in errors will occur. Generally, each device added to the link should use the next higher address starting at 1.

Please refer to the DGCM Communications Guide for details on how to set up the Modbus communications protocol.

DNP communication The DNP (distributed network protocol) communication screen is shown below.PATH: SETPOINTS > S1 PRODUCT SETUP > COMMUNICATIONS > DNP

Please refer to the DGCM Communications Guide for more details on communications.

IEC60870-5-104 protocol

The IEC608708-5-104 protocol configuration screen is shown below.PATH: SETPOINTS > S1 PRODUCT SETUP > COMMUNICATIONS > IEC 104



Please refer to the DGCM Communications Guide for more details on communications.

Event recorderThe Event Recorder includes events generated by operation of the following functions:

• Control functions

• Alarms

• Blocks

• Change of inputs

The events are stored in Flash memory, which can store up to 1024 events. Because Flash memory has a finite number of writings a 256 non-Volatile RAM buffer is used. This means that when an event is generated it is written in non-Volatile RAM first. After 10 minutes all the pending events written in non-Volatile RAM are copied to Flash memory. Two alternative event files are managed in Flash memory in order to prevent event loss. Each event is stored with an event number, date, time, and analog data of interest.

FASTPATH: If there are more than 255 events between writing cycles in the Flash memory and power is lost, only the last 255 events are maintained in non-volatile RAM.

The following table shows the analog data viewable for each recorded event.PATH: SETPOINTS > S1 PRODUCT SETUP > EVENT RECORDER



PICKUP EVENTSRange: Disabled, EnabledDefault: Disabled

When set to “Enabled”, the event recorder records the events that occur when a monitoring element picks up.

DROPOUT EVENTSRange: Disabled, EnabledDefault: Disabled

When set to “Enabled” the event recorder records the dropout state of a monitoring element.

ALARM EVENTSRange: Disabled, EnabledDefault: Enabled

These events include the elements programmed as an “ALARM” or “LATCHED ALARM” function.

CONTROL EVENTSRange: Disabled, EnabledDefault: Enabled

If set to “Enabled”, the event recorder records events caused by the performance of the programmed control elements.

BLOCK EVENTSRange: Disabled, EnabledDefault: Enabled

If set to “Enabled”, the event recorder records events caused by the performance of the programmed block elements.

CONTACT INPUT EVENTSRange: Disabled, EnabledDefault: Enabled

When set to “Enabled”, the event recorder will record the event when a contact input changes its state.

CONTACT OUTPUT EVENTSRange: Disabled, EnabledDefault: Enabled

When set to “Enabled”, the event recorder will record the event when a contact output changes its state.

VIRTUAL INPUT EVENTSRange: Disabled, EnabledDefault: Enabled

When set to “Enabled”, the event recorder records the events which occur upon state changes of any virtual input.

VIRTUAL OUTPUT EVENTSRange: Disabled, EnabledDefault: EnabledWhen set to “Enabled”, the event recorder records the events which occur upon state changes of any virtual outputs.



SETTING DATE/TIME EVENTS Range: Disabled, EnabledDefault: Disabled

When set to “Enabled”, the event recorder records the events which occur upon changes to Date/Time.

Data loggerThe Data Logger samples and records up to 200 analog parameters at a user-defined sampling rate. All data is stored in non-volatile memory to avoid the loss of data when power to the relay is lost.For a fixed sampling rate, the Data Logger can be configured with a few channels over a long period or a larger number of channels for a shorter period. The relay automatically partitions the available memory between the channels in use.Changing any setting affecting Data Logger operation clears any stored data. The relay will start sampling after any change in settings has been produced.

The following settings are available:SETPOINTS > S1 PRODUCT SETUP > DATA LOGGER



SAMPLE RATERange: 5 s, 1 min, 5 min, 15 min, 30 min, 60 min, interval at 64 samples/cycle (60Hz)Default: 30 min

This setting determines how often data is stored in the data log.

DATALOGGER SYNCHRO ENABLERange: Enabled, DisabledDefault: Enabled

This setting is used to synchronize data taken for the DataLogger with time.

Example 1:

If the sample rate is 30 minutes, and the DataLogger Synchro Enable is enabled, the Data Logger records the data at XX:00 and XX:30. This means that data is be synchronized with the time (exact hours and half hours).

Example 2:

If several DGCMs are in use in an application, enabling the Datalogger Synchro Enable setting allows the DGCMs to record data at the same time.

CHANNEL 1 (200) SOURCERange: Any available analog valueDefault: Disabled

This settings determines the metering actual value that is stored in Channel 1 (200) of the data log. The metering actual value selection can be done either by the scroll down option or by typing the appropriate initial characters of the actual value name into the field to narrow down the list.The actual value parameters available in a given relay is dependent on the ordering code and the hardware modules installed.



StatisticsThe DGCM calculates the mean average, max and min values based on the averaging interval programmed under Statistics menu. The DGCM provides the max, mean and min values per phase current and each current source. The number of current sources available in the relay is dependent on the selected order code. In order to avoid the storage of a large amount of data for the mean calculation, the mean value is calculated by applying the Exponential Moving Average (EMA). The mean calculated in this way differs from the Single Moving Average (SMA) during high transitions -spikes changes and abrupt transitions, but it has the advantage that the calculation is made in a recursive form by a simple IIR filter.The SMA is calculated as:

SETPOINTS > S1 PRODUCT SETUP > STATISTICS

The following settings are available:

AVERAGING INTERVALRange: DL Sampling Rate, 1 min, 5 min, 15 min, 30 min, 60 min, 1 dayDefault: DL Sampling Rate

This setting selects the time interval at which the max, min and mean average is calculated. If a DL Sampling Rate is chosen, the applied interval is the same as the Data Logger sample rate.

MAX/MIN CLEAR MODERange: Windowing Mode, Latched modeDefault: Windowing Mode

This setting selects the working mode for the maximum and minimum calculation. In Latched mode, the maximum and minimum value is calculated continuously over new incoming data until the Max/ Min Clear command is received. In Windowing mode, the minimum and maximum values are updated taking into account the samples contained on the moving window time programmed under the AVERAGING INTERVAL setpoint. The interval window is moved at each new sample.

Front panelThe DGCM front panel has 4 LEDs. All LEDs except the first LED illuminate red in color.

The SMA is calculated as:

S(t) = K x I(t) + S(t-1)x(k-1)

Where:

K = 2/(N+1)S(t) New EMA valueS(t-1) Previous EMA valueN Number of instantaneous current samples.



The first LED illuminates green and is reserved for showing the READY state of the DGCM.The rest of the red LEDs are programmable in two ways:

• “1” - Flashing mode in red color

• “2” - Fixed mode in red color

SETPOINTS > S1 PRODUCT SETUP > FRONT PANEL

LEDs codes on Self-Test Error

The Self-Test task is a function that executes every 5 seconds and checks the internal states of several critical elements. The internal fault states available for DGCM are:

• Internal Temperature

• RTC Error

• Order Code Error

• System Health Error

• EEPROM Error

• DSP Error

• Calibration Error

• DPRAM Error

When the cause for a self-test error is generated, the four LEDs located on the front side of the DGCM device will indicate the error. The 4 LEDs start blinking and continue for 5 seconds showing the error. The maximum numbers of error that can be shown by the LEDs are 16. Due to these limitations, some errors cannot be reflected by the LED status.The LED’s internal fault error codes are as follows:

LED 1 (GREEN) LED 2 (RED) LED 3 (RED) LED 4 (RED)

Internal Temperature Error YES NO NO NO

Order Code Error NO YES NO NO

DSP Error YES YES NO NO

DPRAM Error NO NO YES YES

RTC Error YES NO YES YES


CHAPTER 5: SETPOINTS S2 SYSTEM SETUP

InstallationPATH: SETPOINTS > S1 PRODUCT SETUP > INSTALLATION

PRODUCT NAMERange: Name, Alpha-numeric (20 characters)Default: DA Name

The PRODUCT NAME setting allows the user to uniquely identify a DGCM unit. This name will appear on generated reports. This name is also used to identify specific devices which are engaged in automatically sending/receiving data over the communications channel.

PRODUCT STATUSRange: Not Ready, ReadyDefault: Not Ready

Allows the user to activate/deactivate the DGCM. The DGCM is not operational when set to "Not Ready."

S2 System setup

The DGCM Pad Mounted monitoring device can measure up to six three-phase analog current inputs and one three-phase analog voltage input connected through external measuring transformers.DGCM devices are designed to read current and voltage from different types of sources:

• Traditional CT

• Rogowski coils

• Traditional VT

• LEA (Low Energy Analog)

The DGCM’s order code defines the type of sensor used for each current or voltage source. During normal loading conditions the three-phase currents and voltages are well balanced. The controller is using the currents and voltages measured to compute the electrical power (apparent, active, and reactive) per each current bank. All electrical quantities measured and calculated by the controller is tabulated in Chapter 4 in the Metering Section.ConfigurationThe System setup screen is shown below.

Calibration Error NO YES YES NO

EEPROM Error YES YES YES NO

System Health NO NO NO YES

LED 1 (GREEN) LED 2 (RED) LED 3 (RED) LED 4 (RED)


S2 SYSTEM SETUP CHAPTER 5: SETPOINTS

Power systemPATH: SETPOINTS > S2 SYSTEM SETUP > POWER SYSTEM

System RotationRange: ABC, ACBDefault: ABC

This settings informs the relay of the actual system phase sequence, either ABC or ACB. CT and VT inputs on the relay labelled as a, b, and c, must be connected to system phases A, B, and C for correct operation.

Nominal FrequencyRange: 60 Hz, 50 HzDefault: 60 Hz

The power system nominal frequency is used as a default to set the digital sampling rate if the system frequency cannot be measured from available AC signals. This may happen if the signals selected for frequency tracking are not present, or a valid frequency is not detected. Before reverting to the nominal frequency, the frequency tracking algorithm holds the last valid frequency measurement for a safe period of time while waiting for the signals to reappear or for the distortions to decay.

Current setupThe DGCM device is completely configurable with up to 6 sets of 3-phase current inputs (maximum 6 feeders). Although the most common applications may include all sets of current sources located at the same bus on the secondary side of the transformer, each current source can be programmed to be located also on the other bus (i.e., Split bus configuration) at the transformer secondary.In addition, the current source can be associated with a corresponding voltage source to be used for power and energy calculations. The ‘Current Source’ name is taken as a convention for the configuration of the set of three-phase current banks. The Current setup menu screen is shown below.



FASTPATH: Each Current Source number is associated with a set of wiring input numbers on the back of the device. Refer to the wiring diagrams and the Installation section in this manual for more details.

FASTPATH: The current setup menu is order code dependant.

Current source PATH: SETPOINTS > S2 SYSTEM SETUP > CURRENT SETUP > CURRENT SOURCE 1 (6)

Traditional CT

For devices with the Traditional CT option selected the settings are shown below.

Rogowski Coil

For devices with the Rogowski coil option selected the settings are shown below.



NAMERange: Up to 256 charactersDefault: Current Source 1

This setting gives the name of the feeder.

SOURCE 1(6)CT Range: Enabled, DisabledDefault: Disabled

This setting is used to notify the device that Source 1 (6) is monitored. This setting enables the detection settings linked to Source 1 (6).

RATED PRIMARY I

For TRADITIONAL CT

Range: 1 to 3000 A in steps of 1 A Default: 250 A

For ROGOWSKI COIL/ SENSOR

Range: 1 to 600 A in steps of 1 A (*)

Enter the rated primary current used in the actual feeder in amperes.FASTPATH: * The value set with this setting is used as the base for per unit calculation for Protection

elements.

RATED SECONDARY I(*)Range: 1 A, 5 ADefault: 1 A

The rated secondary current used in the actual feeder in amperes.FASTPATH: * The value set with this setting is used as the base for per unit calculation for Protection

elements.

SENSOR 1/2/3 MAGNITUDE CORRECTIONRange: -15.0 to 15.0 in steps of 0.1Default: 1.000

The DGCM uses magnitude and phase correction factors to correct for manufacturing tolerances in the line-sensing equipment. This correction factor is specified on each Rogowski coil with tag. This setting specifies the correction magnitude that must be applied for the measurement taken from SENSOR 1, 2, or 3 input.

FASTPATH: This setting is only available when the current source is the Rogowski coil.



SENSOR 1/2/3 PHASE ANGLE CORRECTIONRange: 0.0° to 359.9° in steps of 0.1°Default: 0.0° Lag

This setting provides the leading phase shift correction that is applied to the phaser calculations to compensate the angle error provided by the sensor.

FASTPATH: This setting is only available when the current source is the Rogowski coil.

BUS SELECTIONRange: Bus 1, NoneDefault: Bus 1

Enter the location of the actual feeder with the associated Bus number, if applicable. This setting is used to sum the total power flowing from the Bus for metering. If a current source is not associated with either of the Bus, select None.

FASTPATH: Refer to the application examples in the Appendix for more details.

VOLTAGE SOURCE SELECTIONRange: None, Voltage Source 1Default: Voltage Source 1

Enter the location of the voltage source associated with this current source bank in order to calculate the power and energy of the feeder.

Bus setupPATH: SETPOINTS > S2 SYSTEM SETUP > BUS SETUP > BUS 1

RATED CURRENTRange: 1 to 4000 A in steps of 1 ADefault: 1000 A

Enter the rated current of the Bus. This value is used as the nominal current reference for Bus detection functions.

Voltage setupThe Voltage setup menu screen is order code dependant. PATH: SETPOINTS > S2 SYSTEM SETUP > VOLTAGE SETUP > VOLTAGE SOURCE 1 (2)

Traditional VT

For devices with the Traditional VT option selected the settings are shown below.



LEA

For devices with the Low Voltage (LEA) option selected the settings are shown below.

NAMERange: Up to 256 charactersDefault: Voltage Source 1

This setting gives the name of the location of the voltage source.

VT RATIORange: 1:1 to 1:10000 in steps of 1Default: 1:1

This setpoint specifies the voltage ratio between the primary and secondary sides.

RATED SECONDARYRange: 60.0 to 600.0 in steps of 0.1Default: 440 V* Range: 0.5 to 10.0 in steps of 0.1* Default: 10 V

Enter the nominal voltage specified for the secondary side of the voltage transformer.FASTPATH: * This setting range is used when the voltage input is from a LEA sensor.

VT CONECTION TYPERange: Wye, DeltaDefault: Wye

This setting defines the type of VT (voltage source) connection Wye or Delta.


CHAPTER 5: SETPOINTS S3 CONFIGURATION

RATED PHASE ANGLE (*)Range: 0.0° to 359.9° in steps of 0.1°Default: 0.0° Lag

Enter the phase shift of secondary voltage related to the primary voltage. Due to the transformation algorithms used for some sensors, the secondary side keeps a shifted angle with regards to the primary voltage. The Phase Angle Shift (at nominal system frequency) information is provided in the sensor data specification sheet. Enter this information in this setting.

FASTPATH: * This setting is only available when the current source is the LEA sensor.

SENSOR 1/2/3 MAGNITUDE CORRECTIONRange: 0.500 to 1.500 in steps of 0.001Default: 1.000

The DGCM uses magnitude and phase correction factors to correct for manufacturing tolerances in the line-sensing equipment. This setting specifies the correction magnitude that must be applied for the measurement taken from the VT1/2/3 input.

The magnitude correction factor equals:

Calculated VT1/2/3 Voltage = VT1/2/3 Magnitude x Measured VT1/2/3 Voltage.FASTPATH: * This setting is only available when the current source is the LEA Voltage sensor.

SENSOR 1/2/3 PHASE ANGLE CORRECTIONRange: -15.0 to 15.0 in steps of 0.01°Default: 0.0° Lag

This setting provides the leading phase shift correction that should be applied to the phasor calculations to compensate the angle error provided by the VT sensor.

FASTPATH: * The voltage setup menu is order code dependant.

S3 Configuration

Configuration settings, including Current Alarms, Bus Alarms, and Voltage Alarms, are available for three identical setpoint groups - Groups 1, 2, and 3 - for all DGCM protection elements.Target message settings are included for future compatibility.


S3 CONFIGURATION CHAPTER 5: SETPOINTS

Setpoint GroupThe Setpoint Group screen is shown below. Refer to section S4 Controls / Change setpoint group for information on switching between setpoint groups both manually and automatically.PATH: SETPOINTS > S3 CONFIGURATION > SETPOINT GROUP 1 (3)

Current alarmsThe Current Alarms screen is shown below. All the current protection alarm functions are applicable to the Current Source 1 (6) and Bus Alarms.PATH: SETPOINTS > S3 CONFIGURATION > SETPOINT GROUP 1 (3) > CURRENT ALARMS



Phase current source alarms

PATH: SETPOINTS > S3 CONFIGURATION > SETPOINT GROUP 1 (3) > CURRENT ALARMS > CURRENT SOURCE 1 (6) ALARMS

Phase high IOCThe DGCM allows multiple phase current sources, depending upon the order code. The Phase instantaneous overcurrent (IOC) element, ANSI device 50P, is available per three phase current source, which has identical characteristics for all three phases. The settings of this function are applied to each of the three phases to produce pickup and operate per phase.PATH: SETPOINTS > S3 CONFIGURATION > SETPOINT GROUP 1 (3) > CURRENT ALARMS > CURRENT SOURCE 1 (6) ALARMS > PHASE HIGH IOC



PH HI IOC FUNCTIONRange: Disabled, Alarm, Latched Alarm, ConfigurableDefault: Disabled

The selection of the Alarm, or Latched Alarm setting enables the Phase IOC function.

When the Alarm function is selected and the phase IOC operates, the LED “ALARM” flashes, and self-resets when the operating conditions are cleared.

When the Latched Alarm function is selected and the phase IOC operates, the LED “ALARM” flashes during the IOC operating condition, and is steady lit after the conditions are cleared. The LED “ALARM” can be cleared by issuing a reset command.

When the Configurable function is selected, the ALARM LEDs will not turn on automatically. They must be configured using their own menus and flexlogic operands.

PH HI IOC PICKUPRange: 0.05 to 2.5 in steps of 0.01 x CT (for Traditional input and Bus)Range: 0.05 to 1.5 in steps of 0.01 x CT (for Rogowski Coil/Sensor)Default: 1.00 x CT

This setting sets the instantaneous overcurrent pickup level specified as a multiplier of the nominal CT current. For example, a PKP setting of 0.9 x CT with 300:5 CT translates into 270 A primary currents.

PH HI IOC DELAYRange: 0.00 to 600.00 s in steps of 0.01 sDefault: 0.00 s

This setting selects the time delay used to delay the operation of the protection.

PH HI IOC BLOCKRange: Off, Any operand from the list of FlexLogic operands, Contact inputs, Virtual inputs, Virtual outputDefault: Off

There is one blocking input provided in the Phase IOC menu. The selection of the block can include any operand from the list of FlexLogic operands, Contact inputs, Virtual Inputs and Virtual Outputs.

PH HI IOC EVENTSRange: Enabled, Disabled?Default: Enabled

The selection of the Enabled setting enables the events of the Phase IOC function.

PH HI IOC TARGETSRange: Self-reset, Latched, DisabledDefault: Self-reset

The selection of the Self-reset or Latched setting enables the targets of the Phase IOC function.



Figure 5-3: PH IOC protection - logic diagram

Phase low IOCThe DGCM allows multiple phase current sources, depending upon the order code. The Phase low instantaneous overcurrent (IOC) element, ANSI device 50P, is available per three phase current source, which has identical characteristics for all three phases. The settings of this function are applied to each of the three phases to produce pickup and operate per phase.PATH: SETPOINTS > S3 CONFIGURATION > SETPOINT GROUP 1 (3) > CURRENT ALARMS > CURRENT SOURCE 1 (6) ALARMS > PHASE LOW IOC

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PH LO IOC FUNCTIONRange: Disabled, Alarm, Latched Alarm, ConfigurableDefault: Disabled

The selection of the Alarm, or Latched Alarm setting enables the Phase IOC function.

When the Alarm function is selected and the phase IOC operates, the LED “ALARM” flashes, and self-resets when the operating conditions are cleared.

When the Latched Alarm function is selected and the phase IOC operates, the LED “ALARM” flashes during the IOC operating condition, and is steady lit after the conditions are cleared. The LED “ALARM” can be cleared by issuing a reset command.


PH LO IOC PICKUPRange: 0.05 to 2.5 in steps of 0.01 x CT (For Traditional input and Bus)Range: 0.05 to 1.5 in steps of 0.01 x CT (For Rogowski Coil/Sensor)Default: 1.00 x CT

This setting sets the instantaneous overcurrent pickup level specified as a multiplier of the nominal CT current. For example, a PKP setting of 0.9 x CT with 300:5 CT translates into 270 A primary currents.

PH LO IOC DELAYRange: 0.00 to 600.00 s in steps of 0.01 sDefault: 0.00 s


PH LO IOC BLOCKRange: Off, Any operand from the list of FlexLogic operands, Contact inputs, Virtual inputs, Virtual outputDefault: Off

There is one blocking input provided in the Phase IOC menu. The selection of the block can include any operand from the list of FlexLogic operands, Contact inputs, Virtual Inputs and Virtual Outputs.

PH LO IOC EVENTSRange: Enabled, DisabledDefault: Enabled

The selection of the Enabled setting enables the events of the Phase IOC function.

PH LO IOC TARGETSRange: Self-reset, Latched, DisabledDefault: Self-reset

The selection of the Self-reset or Latched setting enables the targets of the Phase IOC function.



Figure 5-4: PH IOC protection - logic diagram

Phase time overcurrent protectionThe settings of this function are applied to each of the three phases to produce pickup and alarm condition per phase.The TOC pickup flag is asserted when the current on any phase is above the PKP value. The TOC alarm flag is asserted if the element stays picked up for the time defined by the selected inverse curve and the magnitude of the current. The element drops from pickup without operation if the measured current drops below 97-98% of the pickup value before the time for operation is reached.PATH: SETPOINTS > S3 CONFIGURATION > SETPOINT GROUP 1 (3) > CURRENT ALARMS > CURRENT SOURCE 1 (6) ALARMS > PHASE TOC

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PH TOC FUNCTIONRange: Disabled, Alarm, Latched AlarmDefault: Disabled

The selection of the Alarm, or Latched Alarm setting enables the Phase TOC function.

When the Alarm function is selected and the phase TOC operates, the LED “ALARM” flashes, and self-resets when the operating conditions are cleared.

When the Latched Alarm function is selected and the phase TOC operates, the LED “ALARM” flashes during the TOC operating condition, and is steady lit after the conditions are cleared. The LED “ALARM” can be cleared by issuing a reset command.


PH TOC PICKUPRange: 0.05 to 2.5 in steps of 0.01 x CT (for Traditional input and Bus)Range: 0.05 to 1.5 in steps of 0.01 x CT (for Rogowski Coil/Sensor)Default: 1.00 x CT

This setting sets the time overcurrent pickup level specified as a multiplier of the nominal CT current. For example, a PKP setting of 0.9 x CT with 300:5 CT translates into 270 A primary current.

PH TOC CURVERange: 0.05 to 20.00 in steps of 0.01Default: 1.00

This setting sets the shape of the selected TOC inverse curve. If none of the standard curve shapes is appropriate, a custom User curve, or FlexCurve can be created. Refer to the User curve and the FlexCurve setup for more detail on their configurations and usage.

PH TOC TDMRange: 0.05 to 20.00 in steps of 0.01Default: 1.00

This setting provides selection for the Time Dial Multiplier by which the times from the inverse curve are modified. For example, if an ANSI Extremely Inverse curve is selected with TDM = 2, and the fault current was 5 times bigger than the PKP level, the operation of the element will not occur before an elapsed time from pickup of 495 ms.



PH TOC RESET TIME

The “Instantaneous” reset method is intended for applications with other relays, such as most static relays, which set the energy capacity directly to zero when the current falls below the reset threshold. The “Linear” reset method can be used where the relay must coordinate with electromechanical relays.

PH TOC BLOCKRange: Off, Any operand from the list of FlexLogic operands, Contact inputs, Virtual inputs, Virtual outputDefault: Off

One blocking input provided in the Phase TOC menu. When the selected blocking input - Contact input, Virtual Input, Remote Input, or Logic Element - turns on, the phase TOC function will be blocked.

PH TOC EVENTSRange: Enabled, Disabled?Default: Enabled

The selection of the Enabled setting enables the events of the Phase TOC function.

PH TOC TARGETSRange: Self-reset, Latched, DisabledDefault: Self-reset

The selection of the Self-reset or Latched setting enables the targets of the Phase TOC function.



Figure 5-5: Phase Time Overcurrent Logic Diagram

TOC curvesDESCRIPTIONThe DGCM unit has phase and neutral time over current elements. The programming of the time current characteristics of these elements is similar for both the elements and will only be covered in this section. The required curve is established by programming a Pickup Current, Curve Shape, Curve Multiplier, and Reset Time. The Curve Shape can be either a standard shape or a user-defined shape programmed with the FlexCurve™ feature.Accurate coordination may require changing the time overcurrent characteristics of particular elements under different conditions. The following setpoints are used to program the time-current characteristics.

• <Element_Name> PICKUP: The pickup current is the threshold current at which the time overcurrent element starts timing. There is no intentional ‘dead band’ when the current is above the pickup level. However, accuracy is only guaranteed above a 1.5

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per unit pickup level. The dropout threshold is 98% of the pickup threshold. Enter the pickup current corresponding to 1 per unit on the time overcurrent curves as a multiple of the source CT. For example, if 100: 5 CTs are used and a pickup of 90 amps is required for the time overcurrent element, enter “0.9 x CT”.

• <Element_Name> CURVE: Select the desired curve shape. If none of the standard curve shapes is appropriate, a custom FlexCurve™ can be created by entering the trip times at 80 different current values; see S2 SYSTEM SETUP > FLEXCURVE A. Curve formulas are given for use with computer based coordination programs. Calculated trip time values are only valid for I / Ipu > 1. Select the appropriate curve shape and multiplier, thus matching the appropriate curve with the protection requirements. The available curves are shown in the table below.

• <Element_Name> MULTIPLIER: A multiplier setpoint allows shifting of the selected base curve in the vertical time direction. Unlike the electromechanical time dial equivalent, trip times are directly proportional to the value of the time multiplier setpoint. For example, all trip times for a multiplier of 10 are 10 times the multiplier 1 or base curve values.

When Timed Over-Current is programmed with Definite time, the operating time is obtained after multiplication of the selected Multiplier (TDM) by a 0.1 s base line. For example, selection of TDM = 5 would lead to a 0.5 s operating time.

• <Element_Name> RESET: Time overcurrent tripping time calculations are made with an internal ‘energy capacity’ memory variable. When this variable indicates that the energy capacity has reached 100%, a time overcurrent trip is generated. If less than 100% is accumulated in this variable and the current falls below the dropout threshold of 97 to 99% of the pickup value, the variable must be reduced. Two methods of this resetting operation are available, Instantaneous and Linear. The Instantaneous selection is intended for applications with other relays, such as most static units, which set the energy capacity directly to zero when the current falls below the reset threshold. The Linear selection can be used where the relay must coordinate with electromechanical units. With this setpoint, the energy capacity variable is decremented according to the following equation.

where: TRESET = reset time in seconds; E = energy capacity reached (per unit); M = curve multiplier; CR = characteristic constant (5 for ANSI, IAC, Definite Time, and FlexCurves™; 8 for IEC)TOC CURVE CHARACTERISTICSANSI CurvesThe ANSI time overcurrent curve shapes conform to industry standards and the ANSI C37.90 curve classifications for extremely, very, normally, and moderately inverse. The ANSI curves are derived from the following formula:

where: T = trip time (seconds); M = multiplier value; I = input current; Ipu = pickup current setpoint; A, B, C, D, E = constants

ANSI GE TYPE IAC IEC OTHER

Extremely Inverse Extremely Inverse Curve A (BS142) Definite Time

Very Inverse Very Inverse Curve B (BS142) Flexcurve ATM

Normally Inverse Inverse Curve C (BS142) Flexcurve BTM

Moderately Inverse Short Inverse IEC Short Inverse User Curve



Table 5-1: ANSI Curve Constants

Table 5-2: ANSI Curve Trip Times (in seconds)

IEC Curves

ANSI Curve Shape A B C D E

ANSI Extremely Inverse 0.0399 0.2294 0.5000 3.0094 0.7222

ANSI Very Inverse 0.0615 0.7989 0.3400 –0.2840 4.0505

ANSI Normally Inverse 0.0274 2.2614 0.3000 –4.1899 9.1272

ANSI Moderately Inverse 0.1735 0.6791 0.8000 –0.0800 0.1271

Multiplier (TDM) Current (I/Ipickup)

1.5 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0

ANSI Extremely Inverse

0.5 2.000 0.872 0.330 0.184 0.124 0.093 0.075 0.063 0.055 0.049

1.0 4.001 1.744 0.659 0.368 0.247 0.185 0.149 0.126 0.110 0.098

2.0 8.002 3.489 1.319 0.736 0.495 0.371 0.298 0.251 0.219 0.196

4.0 16.004 6.977 2.638 1.472 0.990 0.742 0.596 0.503 0.439 0.393

6.0 24.005 10.466 3.956 2.208 1.484 1.113 0.894 0.754 0.658 0.589

8.0 32.007 13.955 5.275 2.944 1.979 1.483 1.192 1.006 0.878 0.786

10.0 40.009 17.443 6.594 3.680 2.474 1.854 1.491 1.257 1.097 0.982

ANSI Very Inverse

0.5 1.567 0.663 0.268 0.171 0.130 0.108 0.094 0.085 0.078 0.073

1.0 3.134 1.325 0.537 0.341 0.260 0.216 0.189 0.170 0.156 0.146

2.0 6.268 2.650 1.074 0.682 0.520 0.432 0.378 0.340 0.312 0.291

4.0 12.537 5.301 2.148 1.365 1.040 0.864 0.755 0.680 0.625 0.583

6.0 18.805 7.951 3.221 2.047 1.559 1.297 1.133 1.020 0.937 0.874

8.0 25.073 10.602 4.295 2.730 2.079 1.729 1.510 1.360 1.250 1.165

10.0 31.341 13.252 5.369 3.412 2.599 2.161 1.888 1.700 1.562 1.457

ANSI Normally Inverse

0.5 2.142 0.883 0.377 0.256 0.203 0.172 0.151 0.135 0.123 0.113

1.0 4.284 1.766 0.754 0.513 0.407 0.344 0.302 0.270 0.246 0.226

2.0 8.568 3.531 1.508 1.025 0.814 0.689 0.604 0.541 0.492 0.452

4.0 17.137 7.062 3.016 2.051 1.627 1.378 1.208 1.082 0.983 0.904

6.0 25.705 10.594 4.524 3.076 2.441 2.067 1.812 1.622 1.475 1.356

8.0 34.274 14.125 6.031 4.102 3.254 2.756 2.415 2.163 1.967 1.808

10.0 42.842 17.656 7.539 5.127 4.068 3.445 3.019 2.704 2.458 2.260

ANSI Moderately Inverse

0.5 0.675 0.379 0.239 0.191 0.166 0.151 0.141 0.133 0.128 0.123

1.0 1.351 0.757 0.478 0.382 0.332 0.302 0.281 0.267 0.255 0.247

2.0 2.702 1.515 0.955 0.764 0.665 0.604 0.563 0.533 0.511 0.493

4.0 5.404 3.030 1.910 1.527 1.329 1.208 1.126 1.066 1.021 0.986

6.0 8.106 4.544 2.866 2.291 1.994 1.812 1.689 1.600 1.532 1.479

8.0 10.807 6.059 3.821 3.054 2.659 2.416 2.252 2.133 2.043 1.972

10.0 13.509 7.574 4.776 3.818 3.324 3.020 2.815 2.666 2.554 2.465



For European applications, the relay offers the four standard curves defined in IEC 255-4 and British standard BS142. These are defined as IEC Curve A, IEC Curve B, IEC Curve C, and Short Inverse. The formulae for these curves are:

where: T = trip time (seconds), M = multiplier setpoint, I = input current, Ipu = pickup current setpoint, K, E = constants.

Table 5-3: IEC (BS) Inverse Time Curve Constants

Table 5-4: IEC Curve Trip Times (in seconds)

IEC (BS) Curve Shape K E

IEC Curve A (BS142) 0.140 0.020

IEC Curve B (BS142) 13.500 1.000

IEC Curve C (BS142) 80.000 2.000

IEC Short Inverse 0.050 0.040


1.5 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0

IEC Curve A

0.05 0.860 0.501 0.315 0.249 0.214 0.192 0.176 0.165 0.156 0.149

0.10 1.719 1.003 0.630 0.498 0.428 0.384 0.353 0.330 0.312 0.297

0.20 3.439 2.006 1.260 0.996 0.856 0.767 0.706 0.659 0.623 0.594

0.40 6.878 4.012 2.521 1.992 1.712 1.535 1.411 1.319 1.247 1.188

0.60 10.317 6.017 3.781 2.988 2.568 2.302 2.117 1.978 1.870 1.782

0.80 13.755 8.023 5.042 3.984 3.424 3.070 2.822 2.637 2.493 2.376

1.00 17.194 10.029 6.302 4.980 4.280 3.837 3.528 3.297 3.116 2.971

IEC Curve B

0.05 1.350 0.675 0.338 0.225 0.169 0.135 0.113 0.096 0.084 0.075

0.10 2.700 1.350 0.675 0.450 0.338 0.270 0.225 0.193 0.169 0.150

0.20 5.400 2.700 1.350 0.900 0.675 0.540 0.450 0.386 0.338 0.300

0.40 10.800 5.400 2.700 1.800 1.350 1.080 0.900 0.771 0.675 0.600

0.60 16.200 8.100 4.050 2.700 2.025 1.620 1.350 1.157 1.013 0.900

0.80 21.600 10.800 5.400 3.600 2.700 2.160 1.800 1.543 1.350 1.200

1.00 27.000 13.500 6.750 4.500 3.375 2.700 2.250 1.929 1.688 1.500

IEC Curve C

0.05 3.200 1.333 0.500 0.267 0.167 0.114 0.083 0.063 0.050 0.040

0.10 6.400 2.667 1.000 0.533 0.333 0.229 0.167 0.127 0.100 0.081

0.20 12.800 5.333 2.000 1.067 0.667 0.457 0.333 0.254 0.200 0.162

0.40 25.600 10.667 4.000 2.133 1.333 0.914 0.667 0.508 0.400 0.323

0.60 38.400 16.000 6.000 3.200 2.000 1.371 1.000 0.762 0.600 0.485

0.80 51.200 21.333 8.000 4.267 2.667 1.829 1.333 1.016 0.800 0.646

1.00 64.000 26.667 10.000 5.333 3.333 2.286 1.667 1.270 1.000 0.808

IEC Short Time

0.05 0.153 0.089 0.056 0.044 0.038 0.034 0.031 0.029 0.027 0.026

0.10 0.306 0.178 0.111 0.088 0.075 0.067 0.062 0.058 0.054 0.052

0.20 0.612 0.356 0.223 0.175 0.150 0.135 0.124 0.115 0.109 0.104

0.40 1.223 0.711 0.445 0.351 0.301 0.269 0.247 0.231 0.218 0.207



IAC CurvesThe curves for the General Electric type IAC relay family are derived from the formulae:

where: T = trip time (seconds), M = multiplier setpoint, I = input current, Ipu = pickup current setpoint, A to E = constants.

Table 5-5: GE Type IAC Inverse Curve Constants

Table 5-6: IAC Curve Trip Times

0.60 1.835 1.067 0.668 0.526 0.451 0.404 0.371 0.346 0.327 0.311

0.80 2.446 1.423 0.890 0.702 0.602 0.538 0.494 0.461 0.435 0.415

1.00 3.058 1.778 1.113 0.877 0.752 0.673 0.618 0.576 0.544 0.518

IAC Curve Shape A B C D E

IAC Extreme Inverse 0.0040 0.6379 0.6200 1.7872 0.2461

IAC Very Inverse 0.0900 0.7955 0.1000 –1.2885 7.9586

IAC Inverse 0.2078 0.8630 0.8000 –0.4180 0.1947

IAC Short Inverse 0.0428 0.0609 0.6200 –0.0010 0.0221

Multiplier (TDM)

1.5 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0

IAC Extremely Inverse

0.5 1.699 0.749 0.303 0.178 0.123 0.093 0.074 0.062 0.053 0.046

1.0 3.398 1.498 0.606 0.356 0.246 0.186 0.149 0.124 0.106 0.093

2.0 6.796 2.997 1.212 0.711 0.491 0.372 0.298 0.248 0.212 0.185

4.0 13.591 5.993 2.423 1.422 0.983 0.744 0.595 0.495 0.424 0.370

6.0 20.387 8.990 3.635 2.133 1.474 1.115 0.893 0.743 0.636 0.556

8.0 27.183 11.987 4.846 2.844 1.966 1.487 1.191 0.991 0.848 0.741

10.0 33.979 14.983 6.058 3.555 2.457 1.859 1.488 1.239 1.060 0.926

IAC Very Inverse

0.5 1.451 0.656 0.269 0.172 0.133 0.113 0.101 0.093 0.087 0.083

1.0 2.901 1.312 0.537 0.343 0.266 0.227 0.202 0.186 0.174 0.165

2.0 5.802 2.624 1.075 0.687 0.533 0.453 0.405 0.372 0.349 0.331

4.0 11.605 5.248 2.150 1.374 1.065 0.906 0.810 0.745 0.698 0.662

6.0 17.407 7.872 3.225 2.061 1.598 1.359 1.215 1.117 1.046 0.992

8.0 23.209 10.497 4.299 2.747 2.131 1.813 1.620 1.490 1.395 1.323

10.0 29.012 13.121 5.374 3.434 2.663 2.266 2.025 1.862 1.744 1.654

IAC Inverse

0.5 0.578 0.375 0.266 0.221 0.196 0.180 0.168 0.160 0.154 0.148

1.0 1.155 0.749 0.532 0.443 0.392 0.360 0.337 0.320 0.307 0.297

2.0 2.310 1.499 1.064 0.885 0.784 0.719 0.674 0.640 0.614 0.594

4.0 4.621 2.997 2.128 1.770 1.569 1.439 1.348 1.280 1.229 1.188

6.0 6.931 4.496 3.192 2.656 2.353 2.158 2.022 1.921 1.843 1.781

8.0 9.242 5.995 4.256 3.541 3.138 2.878 2.695 2.561 2.457 2.375

10.0 11.552 7.494 5.320 4.426 3.922 3.597 3.369 3.201 3.072 2.969

IAC Short Inverse


1.5 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0



USER CurvesThe relay provides a selection of user definable curve shapes used by the time overcurrent protection. The User curve is programmed by selecting the proper parameters in the formula:

A, P, Q, B, K - selectable curve parameters within the ranges from the table: D is the Time Dial Multiplier.User Curve can be used on multiple elements only if the time dial multiplier is the same for each element.V = I/IPICKUP (TOC setting) is the ratio between the measured current and the pickup setting.

FASTPATH: The maximum trip time for the User Curve is limited to 65.535 seconds. The User Curve can be used for one protection situation only.

Figure 5-6: USER curve configuration settings

0.5 0.072 0.047 0.035 0.031 0.028 0.027 0.026 0.026 0.025 0.025

1.0 0.143 0.095 0.070 0.061 0.057 0.054 0.052 0.051 0.050 0.049

2.0 0.286 0.190 0.140 0.123 0.114 0.108 0.105 0.102 0.100 0.099

4.0 0.573 0.379 0.279 0.245 0.228 0.217 0.210 0.204 0.200 0.197

6.0 0.859 0.569 0.419 0.368 0.341 0.325 0.314 0.307 0.301 0.296

8.0 1.145 0.759 0.559 0.490 0.455 0.434 0.419 0.409 0.401 0.394

10.0 1.431 0.948 0.699 0.613 0.569 0.542 0.524 0.511 0.501 0.493

Multiplier (TDM)

1.5 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0

Parameters A B P Q K

Range 0 to 125 0 to 3 0 to 3 0 to 2 0 to 1.999

Step 0.0001 0.0001 0.0001 0.0001 0.001

Unit sec sec NA NA sec

Default Value 0.05 0 0.04 1.0 0



FlexcurvesProspective FlexCurves™ can be configured from a selection of standard curves to provide the best approximate fit , then specific data points can be edited afterwards. Click the Initialize button to populate the pickup values with the points from the curve specified by the "Select Curve" setting and the "Multiply" value. These values can then be edited to create a custom curve. Click on the Clear FlexCurve Data button to reset all pickup values to zero.Curve data can be imported from CSV (comma-separated values) files by clicking on the Open button. Likewise, curve data can be saved in CSV format by clicking the Save button. CSV is a delimited data format with fields separated by the comma character and records separated by new lines. Refer to IETF RFC 4180 for additional details.The curve shapes for the two FlexCurves are derived from the following equations.

In the above equations, Toperate represents the operate time in seconds, TDM represents the multiplier setting, I represents the input current, Ipickup represents the value of the pickup current setting, Tflex represents the FlexCurve™ time in seconds.



Figure 5-7: Flexcurve™ configuration settings

The following settings are available for each custom Flexcurve™.

Select CurveRange: Moderately Inverse, Very Inverse, Extremely Inverse, Normally Inverse, IEC Curve A, IEC Curve B, IEC Curve C, IEC Short Inverse, IAC Extreme Inv, IAC Very Inverse, IAC Inverse, IAC Short Inverse, User Curve, FlexCurve B (Note: For FlexCurve A, you can select FlexCurve B as the setpoint, and vice versa for FlexCurve B.)Default: Extremely Inverse

This setting specifies a curve to use as a base for a custom FlexCurve™. Must be used before Initialization is implemented (see Initialization below).



MultiplyRange: 0.01 to 30.00 in steps of 0.01Default: 1.00

This setting provides selection for Time Dial Multiplier by which the times from the inverse curve are modified. For example if an ANSI Extremely Inverse curve is selected with TDM = 2, and the fault current was 5 times bigger than the PKP level, the operation of the element will not occur before a time elapse of 495 ms from pickup.

Initialization

Used after specifying a curve to use as a base for a custom FlexCurve™ (see Select Curve and Multiply above). When the Initialize FlexCurve button is clicked, the pickup settings will be populated with values specified by the curve selected in this setting.

1.03 × Pickup, ..., 20.00 × PickupRange: 0 to 65535 ms in steps of 1Default: 0 ms

These settings specify the time to operate at the following pickup levels 1.03 to 20.00. This data is converted into a continuous curve by linear interpolation between data points. To enter a custom FlexCurve™, enter the operate time for each selected pickup point.

FASTPATH: Each FlexCurve can be configured to provide inverse time characteristic to more than one Time Overcurrent Element. However, for computation of the curve operating times, one must take into account the setting of the Time Delay Multiplier from the FlexCurve menu, and the Time Delay Multiplier setting from TOC menu. The true TDM applied to the TOC element when FlexCurve is selected is the result from the multiplication of both TDM settings. For example, for FlexCurve Multiplier = 5, and Phase TOC Multiplier = 2, the total Time Dial Multiplier will be equal to 10. To avoid confusion, it is suggested to keep the multiplier from the TOC menu equal to 1, and change only the multiplier from the selected FlexCurve. This way, one can see from the FlexCurve setup, the curve operating times as related to the multiples of pickup.

Phase undercurrentThe Phase undercurrent protection function detects the loss of one phase due to a fuse blown condition. The undercurrent protection feature can be used to generate an alarm when the current drops below a specified current setting for a specified time delay.PATH: SETPOINTS > S3 CONFIGURATION > SETPOINT GROUP 1 (3) > CURRENT ALARMS > CURRENT SOURCE 1 (6) ALARMS > PHASE UNDERCURRENT



PH UC FUNCTIONRange: Disabled, Alarm, Latched Alarm, ConfigurableDefault: Disabled

The selection of the Alarm, or Latched Alarm setting enables the Phase UC function.

When the Alarm function is selected and the phase UC operates, the LED “ALARM” flashes, and self-resets when the operating conditions are cleared.

When the Latched Alarm function is selected and the phase UC operates, the LED “ALARM” flashes during the UC operating condition, and is steady lit after the conditions are cleared. The LED “ALARM” can be cleared by issuing a reset command.


PH UC PKPRange: 0.05 to 2.5 in steps of 0.01 x CT (for Traditional input and Bus)Range: 0.05 to 1.5 in steps of 0.01 x CT (for Rogowski Coil/Sensor)Default: 1.00 x CT

This setting sets the undercurrent pickup level times CT. For example, a PKP setting of 0.9 x CT with 300:5 CT translates into 270 A primary current.

PH UC DELAYRange: 0.0 to 600.0 s in steps of 0.1 sDefault: 5.0 s


PH UC BLOCKRange: Off, Contact input 1 to 8, Virtual input 1 to 32, Virtual output 1 to 32Default: Off

There is one blocking input provided in the Phase UC menu. The selection of the block can include Contact inputs, Virtual inputs and Virtual outputs.

PH UC EVENTSRange: Enabled, DisabledDefault: Enabled

The selection of the Enabled setting enables the events of the Phase UC function.

PH UC TARGETSRange: Self-reset, Latched, DisabledDefault: Self-reset

The selection of the Self-reset or Latched setting enables the targets of the UC function.



Figure 5-8: PH UC protection - logic diagram

Neutral instantaneous overcurrent protectionThe relay has one Neutral Instantaneous Overcurrent detection function per feeder. The settings of this function are applied to the calculated neutral current for pickup flag. The Neutral IOC pickup flag is asserted when the neutral current is above the PKP value. The Neutral IOC operate flag is asserted if the element stays picked up for the time defined by the Neutral IOC Delay setting. If the pickup time delay is set to 0.00 seconds, the pickup and operate flags will be asserted at the same time.PATH: SETPOINTS > S3 CONFIGURATION > SETPOINT GROUP 1 (3) > CURRENT ALARMS > CURRENT SOURCE 1 (6) ALARMS > NEUTRAL IOC

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NTRL IOC FUNCTION

The selection of the Alarm setting enables the Neutral instantaneous overcurrent function. The LED “ALARM” will flash upon Ntrl IOC operating condition, and will self-reset, when the operating condition clears.

When the Latched Alarm function is selected and the Neutral IOC operates, the LED “ALARM” flashes during the IOC operating condition, and is steady lit after the conditions are cleared. The LED “ALARM” can be cleared by issuing a reset command.


NTRL IOC PICKUPRange: 0.05 to 2.5 in steps of 0.01 x CT (for Traditional input and Bus)Range: 0.05 to 1.5 in steps of 0.01 x CT (for Rogowski Coil/Sensor)Default: 1.00 x CT

This setting sets the neutral instantaneous overcurrent pickup level specified times CT.

NTRL IOC DELAYRange: 0.00 to 600.00 s in steps of 0.01Default: 0.00

This setting provides the selection for pickup time delay which is used to delay the operation of the detection function.

NTRL IOC BLOCKRange: Off, Contact input 1 to 10, Virtual input 1 to 32, Virtual output 1 to 32Default: Off

There is one blocking input provided in the Neutral IOC menu. The selection of the block can include Contact input, Virtual input and Virtual outputs.

NTRL IOC EVENTSRange: Enabled, Disabled?Default: Enabled

The selection of the Enabled setting enables the events of the Neutral IOC function.

NTRL IOC TARGETSRange: Self-reset, Latched, DisabledDefault: Self-reset

The selection of the Self-reset or Latched setting enables the targets of the Neutral IOC function.



Figure 5-9: Neutral Instantaneous Overcurrent Protection Logic Diagram

Neutral time overcurrent protectionThe settings of this function are applied to the neutral current to produce trip or pickup flags.The Neutral TOC pickup flag is asserted when the neutral current is above the PKP value. The Neutral TOC trip flag is asserted if the element stays picked up for the time defined by the selected inverse curve and the magnitude of the current. The element drops from pickup without operation, if the measured current drops below 97-98% of the pickup value before the time for operation is reached.PATH: SETPOINTS > S3 CONFIGURATION > SETPOINT GROUP 1 (3) > CURRENT ALARMS > CURRENT SOURCE 1 (6) ALARMS > NEUTRAL TOC

NTRL TOC FUNCTIONRange: Disabled, Alarm, Latched AlarmDefault: Disabled

The selection of the Alarm, or Latched Alarm setting enables the Neutral TOC function.

When the Alarm function is selected and the Neutral TOC operates, the LED “ALARM” flashes, and self-resets when the operating conditions are cleared.

When the Latched Alarm function is selected and the Neutral TOC operates, the LED “ALARM” flashes during the TOC operating condition, and is steady lit after the conditions are cleared. The LED “ALARM” can be cleared by issuing a reset command.


NTRL TOC PICKUPRange: 0.05 to 2.5 in steps of 0.01 x CT (for Traditional input and Bus)Range: 0.05 to 1.5 in steps of 0.01 x CT (for Rogowski Coil/Sensor)Default: 1.00 x CT

This setting sets the time overcurrent pickup level specified as a multiplier of the nominal CT current. For example, a PKP setting of 0.9 x CT with 300:5 CT translates into 270 A primary current.

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NTRL TOC CURVE

This setting sets the shape of the selected TOC inverse curve. If none of the standard curve shapes is appropriate, a custom User curve, or FlexCurve can be created. Refer to the User curve and the FlexCurve setup for more detail on their configurations and usage.

PH TOC TDMRange: 0.05 to 20.00 in steps of 0.01Default: 1.00

This setting provides selection for the Time Dial Multiplier by which the times from the inverse curve are modified. For example, if an ANSI Extremely Inverse curve is selected with TDM = 2, and the fault current was 5 times bigger than the PKP level, the operation of the element will not occur before an elapsed time from pickup of 495 ms.

NTRL TOC RESET TIME

The “Instantaneous” reset method is intended for applications with other relays, such as most static relays, which set the energy capacity directly to zero when the current falls below the reset threshold. The “Linear” reset method can be used where the relay must coordinate with electromechanical relays.

NTRL TOC BLOCKRange: Off, Any operand from the list of FlexLogic operands, Contact inputs, Virtual inputs, Virtual outputDefault: Off

One blocking input provided in the Neutral TOC menu. When the selected blocking input - Contact input, Virtual Input, Remote Input, or Logic Element - turns on, the Neutral TOC function will be blocked.

NTRL TOC EVENTSRange: Enabled, Disabled?Default: Enabled

The selection of the Enabled setting enables the events of the Neutral TOC function.

NTRL TOC TARGETSRange: Self-reset, Latched, DisabledDefault: Self-reset

The selection of the Self-reset or Latched setting enables the targets of the Neutral TOC function.



Figure 5-10: Neutral Time Overcurrent Logic Diagram

Current unbalanceThe Current Unbalance function in DGCM displays the ratio of negative-sequence to positive-sequence current, calculated as: Current Unbalance = I2/I1 * 100%. An alarm occurs once the unbalance level reached equals or exceeds the set pickup level for the set delay.If the positive sequence current is below 10% of the current source primary setpoint, the current unbalance function is disabled. This avoids alarms which may otherwise occur when the system is lightly loadedWhen setting the pickup level, note that a 1% voltage unbalance typically translates into a 6% current unbalance. Also, since short term unbalances are common, settings should reflect both a reasonable delay and high enough pickup level to filter out nuisance alarms.



FASTPATH: Unusually high unbalance levels may be caused by incorrect phase CT wiring.

PATH: SETPOINTS > S3 CONFIGURATION > SETPOINT GROUP 1 (3) > CURRENT ALARMS > CURRENT SOURCE 1 (6) ALARMS > CURRENT UNBALANCE

CURRENT UNBAL FUNCTIONRange: Disabled, Alarm, Latched Alarm, ConfigurableDefault: Disabled

The selection of the Alarm, or Latched Alarm setting enables the Current Unbalance function.

When the Alarm function is selected and the Current Unbalance operates, the LED “ALARM” flashes, and self-resets when the operating conditions are cleared.

When the Latched Alarm function is selected and the Current Unbalance operates, the LED “ALARM” flashes during the unbalance operating condition, and is steady lit after the conditions are cleared. The LED “ALARM” can be cleared by issuing a reset command.


CURRENT UNBAL PICKUPRange: 4 to 40% in steps of 1%Default: 20%

This setting specifies a pickup threshold for the current unbalance stage. When the current unbalance equals or exceeds this level, a current unbalance alarm occurs.

CURRENT UNBAL DELAYRange: 1 to 600.0 s in steps of 0.01 sDefault: 10.0 s

This setting specifies a time delay for the unbalance stage. If the current unbalance equals or exceeds the CURRENT UNBAL PICKUP value, and remains in the pickup condition for the time delay set in this setpoint, a current balance alarm occurs.

CURRENT UNBAL BLOCKRange: Contact Inputs 1 to 32, Virtual Inputs 1 to 33, Virtual Outputs 1 to 32Default: Off

One blocking input is provided in the Current Unbalance menu. When the selected blocking input - Contact input, Virtual Input, or Virtual Output - turns on, the Current Unbalance function will be blocked.

CURRENT UNBAL EVENTSRange: Enabled, DisabledDefault: Enabled

The selection of the Enabled setting enables the events of the Current Unbalance function.



CURRENT UNBAL TARGETSRange: Self-reset, Latched, DisabledDefault: Self-reset

The selection of the Self-reset or Latched setting enables the targets of the Current Unbalance function.



Figure 5-11: Current Unbalance Logic Diagram



Voltage alarmsThe voltage alarms screen is shown below.

PATH: SETPOINTS > S3 CONFIGURATION > SETPOINT GROUP 1 (3) > VOLTAGE ALARMS

Phase overvoltage The Phase OV protection can be used to protect voltage sensitive feeder loads and circuits against sustained overvoltage conditions. The protection element can be used to generate an alarm when the voltage exceeds the selected voltage level for the specified time delay.PATH: SETPOINTS > S3 CONFIGURATION > SETPOINT GROUP 1 (3) > VOLTAGE ALARMS > VOLTAGE SOURCE 1 ALARMS > PHASE OVERVOLTAGE

PH OV FUNCTIONRange: Disabled, Alarm, Latched Alarm, ConfigurableDefault: Disabled

The selection of Alarm, or Latched Alarm setting enables the Phase instantaneous overcurrent function.

When the Alarm function is selected and the Phase OV operates, the LED “ALARM” flashes and self-resets when the operating conditions are cleared.

When the Latched Alarm function is selected and the Phase OV operates, the LED “ALARM” flashes during the Phase OV operating condition and is steady lit after the conditions are cleared. The LED “ALARM” can be cleared by issuing a reset command.


PH OV PKPRange: 0.05 to 1.25 x VT in steps of 0.01Default: 1.25 x VT

This setting defines the Phase OV pickup level, and is usually set to a level above which some voltage sensitive loads and feeder components may experience over-excitation and dangerous overheating conditions.



PH OV DELAYRange: 0.0 to 600.0 s in steps of 0.1Default: 1.0 s

This setting specifies the time delay before OV operation.

PH OV PHASESRange: Any One, All ThreeDefault: Any One

This setting selects the combination of overvoltage conditions with respect to the number of the phase voltages to the overvoltage pickup setting.

PH OV BLOCKRange: Off, Contact Input 1 to 10, Virtual Input 1 to 32, Virtual Output 1 to 32Default: Off

There is one blocking input provided in the Phase Overvoltage menu. The selection of the block can include Contact Inputs, Virtual Inputs, and Virtual Outputs.

PH OV EVENTSRange: Enabled, DisabledDefault: Enabled

The selection of the Enabled setting enables the events of the Phase OV function.

PH OV TARGETSRange: Self-reset, Latched, DisabledDefault: Self-reset

The selection of the Self-reset or Latched setting enables the targets of the Phase OV function.



Figure 5-12: Phase Overvoltage logic diagram

Phase undervoltage For voltage sensitive loads, such as induction motors, a drop in voltage will result in an increase in the drawn current, which may cause dangerous overheating in the motor. The undervoltage (UV) protection feature can be used to generate an alarm when the voltage drops below a specified voltage setting for a specified time delay.PATH: SETPOINTS > S3 CONFIGURATION > SETPOINT GROUP 1 (3) > VOLTAGE ALARMS > VOLTAGE SOURCE 1 ALARMS > PHASE UNDERVOLTAGE

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PH UV FUNCTIONRange: Disabled, Alarm, Latched Alarm, ConfigurableDefault: Disabled

The selection of the Alarm, or Latched Alarm setting enables the phase UV function.

When the Alarm function is selected and the phase UV operates, the LED “ALARM” flashes and self-resets when the operating condition is cleared.

When the Latched Alarm function is selected and the phase UV operates, the LED “ALARM” flashes during the phase UV operating condition and is steady lit after the condition is cleared. The LED “ALARM” can be cleared by issuing a reset command.


PH UV PKPRange: 0.05 to 1.25 x VT in steps of 0.01Default: 0.75 x VT

This setting defines the phase UV pickup level, and it is usually set to a level, below which the drawn current from voltage sensitive loads, such as induction motors may cause dangerous motor overheating conditions.

PH UV PHASESRange: Any One, All ThreeDefault: Any One

This setting selects the combination of under voltage conditions with respect to the number of phase voltages under the under voltage pickup setting. Selection of the “All Three” setting would effectively rule out the case of single VT fuse failure.

PH UV DELAYRange: 0.0 to 600.0 s in steps of 0.1Default: 1.0 s

This setting specifies a time delay, used by the selected PHASE UV CURVE type of timing to calculate time before UV operation.

PH UV MIN VOLTAGERange: 0.00 to 1.25 x VT in steps of 0.01Default: 0.30 X VT

The minimum operating voltage level is programmable to prevent undesired UV operation before the voltage becomes available.



PH UV BLOCKRange: Off, Contact Input 1 to 8, Virtual Input1 to 32, Virtual Output 1 to 32Default: Off

There is one blocking input provided in the phase undervoltage menu. The selection of the block can include Contact Inputs, Virtual Inputs and Virtual Outputs.

PH UV EVENTSRange: Enabled, DisabledDefault: Enabled

The selection of the Enabled setting enables the events of the phase UV function.

PH UV TARGETSRange: Self-reset, Latched, DisabledDefault: Self-reset

The selection of the Self-reset or Latched setting enables the targets of the UV function.



Figure 5-13: Phase Undervoltage - logic diagram

Phase loss For voltage sensitive loads, such as induction motors, a drop in voltage results in an increase in the drawn current, which may cause dangerous overheating in the motor. The phase loss protection feature can be used to generate an alarm when the voltage drops below a specified voltage setting for a specified time delay.PATH: SETPOINTS > S3 CONFIGURATION > SETPOINT GROUP 1 (3) > VOLTAGE ALARMS > VOLTAGE SOURCE 1 ALARMS > PHASE LOSS

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PH LOSS FUNCTIONRange: Disabled, Alarm, Latched Alarm, ConfigurableDefault: Disabled

The selection of the Alarm, or Latched Alarm setting enables the Phase Loss function.

When the Alarm function is selected and the Power Loss operates, the LED “ALARM” flashes and self-resets when the operating condition is cleared.

When the Latched Alarm function is selected and the Power Loss operates, the LED “ALARM” flashes during the power loss operating condition and is steady lit after the condition is cleared. The LED “ALARM” can be cleared by issuing a reset command.


PH LOSS PKPRange: 0.05 to 1.25 x VT in steps of 0.01 x VTDefault: 0.80 x VT

This setting defines the phase UV pickup level, and it is usually set to a level, below which the drawn current from voltage sensitive loads, such as induction motors may cause dangerous motor overheating conditions.

PH LOSS DELAYRange: 0.0 to 600.0 s in steps of 0.1Default: 2.0 s

This setting specifies the time delay the phase voltage has to be below the threshold to detect a phase loss condition.

PH LOSS BLOCKRange: Off, Contact Input 1 to 8, Virtual Input 1 to 32, Virtual Output 1 to 32Default: Off

There is one blocking input provided in the Phase Loss menu. The selection of blocking inputs/outputs can include Contact Inputs, Virtual Inputs and Virtual Outputs.

PH LOSS EVENTSRange: Enabled, DisabledDefault: Enabled

The selection of the Enabled setting enables the events of the Phase Loss function.

PH LOSS TARGETSRange: Self-Reset, Latched, DisabledDefault: Self-Reset

The selection of the Self-Reset or Latched setting enables the targets of the Phase Loss function.



Figure 5-14: Phase Loss - logic diagram

Voltage unbalance The Voltage Unbalance function in DGCM displays the ratio of negative-sequence to positive-sequence voltage, calculated as: Voltage Unbalance = V2/V1 * 100%. An alarm occurs once the unbalance level reached equals or exceeds the set pickup level for the set delay.

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PATH: SETPOINTS > S3 CONFIGURATION > SETPOINT GROUP 1 (3) > VOLTAGE ALARMS > VOLTAGE SOURCE 1 ALARMS > UNBALANCE

VOLTAGE UNBAL FUNCTIONRange: Disabled, Alarm, Latched Alarm, ConfigurableDefault: Disabled

The selection of the Alarm, or Latched Alarm setting enables the Voltage Unbalance function.

When the Alarm function is selected and the Voltage Unbalance operates, the LED “ALARM” flashes, and self-resets when the operating conditions are cleared.

When the Latched Alarm function is selected and the Voltage Unbalance operates, the LED “ALARM” flashes during the unbalance operating condition, and is steady lit after the conditions are cleared. The LED “ALARM” can be cleared by issuing a reset command.


VOLTAGE UNBAL PICKUPRange: 4 to 40% in steps of 1%Default: 20%

This setting specifies a pickup threshold for the voltage unbalance stage. When the voltage unbalance equals or exceeds this level, a voltage unbalance alarm occurs.

VOLTAGE UNBAL DELAYRange: 1 to 600.0 s in steps of 0.01 sDefault: 10.0 s

This setting specifies a time delay for the unbalance stage. If the voltage unbalance equals or exceeds the VOLTAGE UNBAL PICKUP value, and remains in the pickup condition for the time delay set in this setpoint, a voltage balance alarm occurs.

VOLTAGE UNBAL BLOCKRange: Off, Contact Inputs 1 to 32, Virtual Inputs 1 to 32, Virtual Outputs 1 to 32Default: Off

One blocking input is provided in the Voltage Unbalance menu. When the selected blocking input - Contact input, Virtual Input, or Virtual Output - turns on, the Voltage Unbalance function will be blocked.

VOLTAGE UNBAL EVENTSRange: Enabled, DisabledDefault: Enabled

The selection of the Enabled setting enables the events of the Voltage Unbalance function.



VOLTAGE UNBAL TARGETSRange: Self-reset, Latched, DisabledDefault: Self-reset

The selection of the Self-reset or Latched setting enables the targets of the Voltage Unbalance function.



Figure 5-15: Voltage Unbalance Logic Diagram



Voltage disturbance indicators

Voltage SagAs per IEEE 1159-2009, Voltage sag (or dip) is a fall in RMS voltage between 0.1 pu and 0.9 pu for durations from 0.5 cycles to 1 min. The sag condition ends when the RMS voltage level increases to at least 10% of the nominal VT voltage above the sag pickup setting. When the voltage on any phase drops below this level, a sag condition occurs. Voltage sags are usually associated with system faults, but can also be caused by switching heavy loads or starting large motors. Short duration sag may cause process disruptions.Voltage SwellAs per IEEE 1159-2009, Voltage swell is an increase in RMS voltage above 1.1 pu for durations from 0.5 cycle to 1 min. To end a Swell condition the level must decrease to 10% of the nominal voltage bellow the SWELL LEVEL setting. Voltage swells are usually associated with system fault conditions, but they are much less common than voltage sags. An SLG fault on the system can cause a swell to occur, resulting in a temporary voltage rise on the healthy phases. Swells can also be caused by switching off a large load, load shedding, or switching on a large capacitor bank. Voltage swell may cause failure of the components depending upon the magnitude and frequency of occurrence.Below is the reference table representing the different category of Voltage Sag/Swell condition based on duration and pickup level.

FASTPATH: Phase loss function can be used to detect voltage interruption conditions.

Sustained/long duration voltage disturbance conditions (which lasts more than 1 min) can be differentiated by appropriately setting delays associated with the function.

PATH: SETPOINTS > S3 CONFIGURATION > SETPOINT GROUP 1 (3) > VOLTAGE ALARMS > VOLTAGE SOURCE 1 ALARMS > DISTURBANCE INDICATORS

Short duration root-mean-square (rms) Duration Level

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Sag 0.5 - 30 cycles 0.1 - 0.9 pu

Swell 0.5 - 30 cycles 1.1 - 1.8 pu

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Sag 30 cycles - 3 s 0.1 - 0.9 pu

Swell 30 cycles - 3 s 1.1 - 1.4 pu

Interruption 0.5 cycles - 3 s < 0.1 pu

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Sag >3s - 1 min 0.1 - 0.9 pu

Swell >3s - 1 min 1.1 - 1.2 pu

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VDIRange: Disabled, Alarm, Latched Alarm, ConfigurableDefault: Disabled

The selection of the Alarm, or Latched Alarm setting enables the Voltage Disturbance Indicator function.

When the Alarm function is selected and the Voltage Disturbance Indicator operates, the LED “ALARM” flashes, and self-resets when the operating conditions are cleared.

When the Latched Alarm function is selected and the Voltage Disturbance Indicator operates, the LED “ALARM” flashes during the Voltage Disturbance operating condition, and is steady lit after the conditions are cleared. The LED “ALARM” can be cleared by issuing a reset command.


PH (A,B,C) VDI SWELL PKPRange: 1.10 to 1.80 x VT in steps of 0.01 Default: 1.20 x VT

This setting sets the voltage swell pickup level specified as a multiplier of the nominal VT voltage.

PH VDI SWELL DELAYRange: 0.0 to 600.0 s in steps of 0.1 sDefault: 5.00 s

This setting specifies an operation time delay for the voltage swell function. Short duration (less than 1 minute) and long duration (greater than 1 minute) Overvoltage conditions can be differentiated by settings this delay appropriately.

PH VDI MIN VOLTAGERange: 0.0 to 0.5 x VT in steps of 0.01 Default: 0.10 x VT

This setting defines the minimum feeder voltage level required to identify the voltage sag condition. Setting this minimum voltage helps differentiate between voltage sag conditions, and down feeder or phase loss conditions.

PH (A,B,C) VDI SAG PKPRange: 010 to 0.90 x VT in steps of 0.01 Default: 0.70 x VT

This setting sets the voltage sag pickup level specified as a multiplier of the nominal VT voltage.

FASTPATH: Individual phase voltages should be above the PH VID MIN VOLTAGE setting in order to pickup below the SAG PKP setting. This is required to differentiate between voltage sag conditions, and down feeder or phase loss conditions.

PH VDI SAG DELAYRange: 0.0 to 600.0 s in steps of 0.1 sDefault: 5.00 s

This setting specifies an operation time delay for the voltage sag function. Short duration (less than 1 minute ) and long duration (greater than 1 minute) under-voltage conditions can be differentiated by settings this delay appropriately.



PH VDI SAG ALARM RESETRange: 0.0 to 600.0 s in steps of 0.1 sDefault: 5.00 s

This setting specifies duration for the voltage sag operation alarm. After the alarm reset time has passed, the sag operation alarm is reset until the next sag event. This setting avoids undesired continuous alarms int he event an upstream power source is turned off.

VDI BLOCKRange: Off, Contact Inputs 1 to 8, Virtual Inputs 1 to 32, Virtual Outputs 1 to 32Default: Off

One blocking input is provided in the Voltage Disturbance Indicators menu. When the selected blocking input - Contact input, Virtual Input, or Virtual Output - turns on, the Voltage Unbalance function will be blocked.

VDI EVENTSRange: Enabled, DisabledDefault: Enabled

The selection of the Enabled setting enables the events of the Voltage Disturbance Indicator function.

VDI TARGETSRange: Self-reset, Latched, DisabledDefault: Self-reset

The selection of the Self-reset or Latched setting enables the targets of the Voltage Disturbance Indicator function.



Figure 5-16: Voltage disturbance indicator logic diagram (page 1 of 2)



Figure 5-17: Voltage disturbance indicator logic diagram (page 2 of 2)


S4 CONTROLS CHAPTER 5: SETPOINTS

S4 Controls

The Controls settings include options to change the setpoint group, progam virtual input commands,

Change setpoint groupThe Multilin DGCM has three identical settings groups - Groups 1, 2, and 3 - for all DGCM protection elements. Switching between these three groups is available either automatically by assigning an input (contact, virtual, remote, flexlogic element), or manually through communications.Group 1 is the default setting group. The device can automatically switch from Group 1 DGCM protection elements to the other group elements, and vice versa, by setting up the switching conditions under “Change Setpoint Group”. Under some application conditions, it may be undesirable to change settings groups. In such cases, the user can set a condition under “BLOCK GROUP CHANGE”, where if asserted, the active settings group will stay active, even if the input configured to switch to the other settings group is asserted.For example, if the active group was Group 1 and the input configured under “BLK GROUP CHANGE” is asserted, the relay will maintain settings Group 1, even if the input “SET GROUP 2 (3) ACTIVE” is asserted. Alternatively, if the “BLK GROUP CHANGE” input is asserted, the relay will not switch from Group 2/3 to Group 1, even if the input under “SET GROUP 2 (3) ACTIVE” is de-asserted.The device will default to settings Group 1, if both the input “SET GROUP 2 (3) ACTIVE” and the blocking input “BLK GROUP CHANGE” are de-asserted. Set Group 3 of settings has a higher priority than the rest of the setting groups. That means, if both “SET GROUP 2 ACTIVE” and “SET GROUP 3 ACTIVE” signals are maintained asserted at the same time, the Multilin DGCM will change to the Set Group 3 of settings. The logic functionality takes into account this feature.PATH: SETPOINTS > S4 CONTROLS > CHANGE SETPOINT GROUP


CHAPTER 5: SETPOINTS S4 CONTROLS

SET GROUP 2 ACTIVERange: Off, Contact Input 1 to 32 (Order Code dependent), Virtual Input 1 to 32, Virtual Output 1 to 32, Contact Output 1 to 16Default: Off

This setting selects an input, used to change to Setpoint Group 2, when asserted. If no group change supervision is selected, Setpoint Group 2 will stay active as long as the “SET GROUP 2 ACTIVE” input is asserted, and will revert to the default group (Setpoint Group 1) when this input is de-asserted

SET GROUP 3 ACTIVERange: Off, Contact Input 1 to 32 (Order Code dependent), Virtual Input 1 to 32, Virtual Output 1 to 32, Contact Output 1 to 16Default: Off

This setting selects an input, used to change to Setpoint Group 3, when asserted. If no group change supervision is selected, Setpoint Group 3 will stay active as long as the “SET GROUP 3 ACTIVE” input is asserted, and will revert to the default group (Setpoint Group 1) when this input is de-asserted

BLOCK GROUP CHANGERange: Off, Contact Input 1 to 32 (Order Code dependent), Virtual Input 1 to 32, Virtual Output 1 to 32, Contact Output 1 to 16Default: Off

This setting defines an input that can be used to block changing between setpoint groups. When the assigned input is asserted, changing from one setpoint group to another is blocked.



Figure 5-18: Changing Settings groups – logic diagram

Virtual input commandsThere are 32 Virtual Inputs that can be individually programmed to respond to Input commands entered via the relay keypad, or by using communication protocols. Virtual Input programming begins with enabling the Virtual Input function and selecting the Virtual Input Type - Self-Reset or Latched - under SETTINGS > S5 INPUTS/OUTPUTS. Next, under SETTINGS > S4 CONTROLS > VIRTUAL INPUT COMMANDS, the user assigns either an On or an Off command to the Virtual Input enabled earlier.

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VIRTUAL INPUT 1 to 32Range: Off, OnDefault: Off

The state of each virtual input can be controlled under SETPOINTS > S4 CONTROLS > VIRTUAL INPUT COMMANDS menu. Entering Off or On in the selected menu window will change the input state.

FASTPATH: See also the Virtual inputs section under S5 Inputs/Outputs.

Cold load pickupThe DGCM can be programmed to both block instantaneous over-current elements and raise the pickup level of time over-current elements when a cold load condition is detected. A cold load condition is detected during closing of the breaker on a feeder that has been de-energized for a long time; the feeder inrush current and the motor accelerating current during breaker closing may be above some over-current protection settings.The figure below shows the slow decay of the cold load current starting near 500% of the nominal current at the time of breaker closing, decaying to 300% after 1 second, 200% after 2 seconds, and 150% after 3 seconds have elapsed.

Figure 5-19: Cold Load Pickup

The DGCM detects the Cold Load condition (Cold Load Pickup armed), if the currents on all three phases drop below 3% of the CT nominal current rating for the period of time greater than the Outage Time setting. The Cold Load condition can be initiated immediately, bypassing the Outage Time timer, by asserting a contact input selected for CLP Ext Initiate.The second timer, CLP Blocking Time, is used to specify how long the instantaneous over-current elements are blocked after breaker closing. The timer starts when at least one of the three phase currents is above 10% of the CT nominal current. Upon timer expiration, settings return to normal.Cold Load Pickup settings can be applied to any of the 3-phase current inputs configured on your device through the Cold Load Pickup menu screen as shown below.



PATH: S4 CONTROLS > COLD LOAD PICKUP

CLP FUNCTIONRange: Disabled, Alarm, Latched Alarm, ConfigurableDefault: Disabled

The selection of the Alarm, or Latched Alarm setting enables the Cold Load Pickup function.

When the Alarm function is selected and the Cold Load Pickup operates, the LED “ALARM” flashes, and self-resets when the operating conditions are cleared.

When the Latched Alarm function is selected and the Cold Load Pickup operates, the LED “ALARM” flashes during the Cold Load Pickup operating condition, and is steady lit after the conditions are cleared. The LED “ALARM” can be cleared by issuing a reset command.


OUTAGE TIMERange: 1 to 1000 min in steps of 1 minDefault: 20 min

The outage time timer starts when the feeder is de-energized (the current drops below 3% of the nominal current CT). The Cold Load Pickup is armed after the outage time has passed.



CLP BLOCKING TIMERange: 1 to 1000 s in steps of 1 sDefault: 5 s

This setting sets both the blocking time for the selected instantaneous overcurrent elements, and the time pickup level is raised for the time overcurrent elements. This timer starts when currents over 10% of the nominal current CT are detected.

CLP EXT INITIATERange: Off, Contact Inputs 1 to 8, Virtual Inputs 1 to 32, Virtual Outputs 1 to 32Default: Off

This setting allows the user to select between Contact input, Virtual Input, or Virtual Output, and force the Cold Load Pickup element into the armed state, bypassing the Outage Time timer.

BLOCK PH HIGH IOC / BLOCK PH LOW IOC / BLOCK PH NEUTRAL IOCRange: No, YesDefault: No

Each element listed can be selected as blocked upon the Cold Load Pickup condition.

SELECT SETPOINT GROUPRange: Active Group, Group 1, Group 2, Group 3Default: Active Group

The Cold Load Pickup blocking function blocks the IOC and adjusts the TOC pickup levels for the overcurrent elements for the specified group, or whichever setting group is active if Active Group is selected.

RAISE PH TOC / Neutral TOC PKPRange: 0 to 100% in steps of 1%Default: 0%

The pickup level of TOC elements can be raised from 0 to 100% upon Cold Load Pickup conditions.

CLP EVENTSRange: Enabled, DisabledDefault: Enabled

This setting enables the events of the Cold Load Pickup function.

CLP TARGETSRange: Self-reset, Latched, DisabledDefault: Self-reset

The selection of the Self-reset or Latched setting enables the targets of the Cold Load Pickup function.



Figure 5-20: Cold Load Pickup Logic Diagram


CHAPTER 5: SETPOINTS S5 INPUTS AND OUTPUTS

S5 Inputs and outputs

The Inputs/Outputs settings include Contact Inputs, Output Relays, and Cirtual Inputs.

Contact inputsThe Multilin DGCM relay can be equipped with up to 4 digital input output (DIO) cards, selectable by the order code. Each DIO card provides 16 contact inputs numbered from 1 to 16. All contact inputs are available with a debounce time selection and a delay input time.Changing the state of all inputs will be inhibited, if the relay is in “Not Ready” mode. The digital contact input is activated when the voltage applied to the input is higher than the threshold level. Refer to the Specifications in Chapter 1 for more details.PATH: SETPOINTS > S5 INPUTS/OUTPUTS > CONTACT INPUTS


S5 INPUTS AND OUTPUTS CHAPTER 5: SETPOINTS

CI DEBOUNCE TIMERange: 10 to 100 in steps of 5 msDefault: 15 ms

This setting defines the debounce time set for inputs. The debounce time is the time window for filtering an input. If an input sustains a change of level that lasts less than this set time, the change will not be considered. This setting is applied to all contact inputs.

CONTACT INPUT 1 (64) NAMEDefault: Input 1 to 64

The input name assigned to the contact input.

DELAY INPUT 1 (64) TIMERange: 0 to 100 in steps of 5 msDefault: 0 ms

This setting specifies the time required by the contact input so it will be energized to detect the change of the state of the input. The delay setting is used in slow switchgear applications.

Settings, the debounce time and the delay input time are applied during energization and during energization of the input.

It is important to distinguish between the delay time setting and the debounce time used for filtering undesired transients in the input signal.

Figure 5-21: Logic Implementation for each Digital Input

Output relaysThe Multilin DGCM can be equipped with up to 4 digital input output (DIO) cards, selectable by the order code. Each DIO card provides 8 contact outputs relays numbered from 1 to 8. All these relays are available for selection to energize on either pickup or operate flags generated by the protection, control, or maintenance feature.Each relay can be selected as either Self-Reset, or Latched. If the Self-Reset type is selected, the contact output will be energized as long as the element is in operating mode, and will reset when the element drops out. If the Latched type is selected, the contact output will stay energized, after element dropout, and will be de-energized upon the reset

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command. Each relay also can be selected either Failsafe or Non-Failsafe. In Failsafe mode the contact is energized. Changing the state of all relays will be inhibited, if the relay is in “Not Ready” mode.PATH: SETPOINTS > S5 INPUTS/OUTPUTS > OUTPUT RELAYS

CONTACT OUTPUT 1 (32) NAMEDefault: Relay 1 to 32

The relay name given to the contact output.

CONTACT OUTPUT 1 (32) FUNCTIONRange: Off, Contact Inputs 1 to X, Virtual Input 1 to 32, Virtual Output 1 to 32, Any control elementDefault: Off

This setting defines the logic element assigned to the contact output. When the selected input is asserted, the contact output will be closed.

CONTACT OUTPUT 1 (32) SEAL-IN TIMERange: 0.00 to 9.99s in steps of 0.01sDefault: 0.50s

This setting specifies the minimum time the contact output will be energized. The seal-in timer starts its count as soon as the contact output is energized. The contact output relay is energized until the expiration of the seal-in timer or the time the closing input element stays activated, whichever is longer.

CONTACT OUTPUT 1 (32) TYPERange: Self-Reset, LatchedDefault: Self-Reset

This setting defines the behaviour of the contact output.

If Self-Reset is selected, the contact output will remain activated until the seal-in timer has expired or until the closing input element has been deactivated. See the ‘Contact Output # Seal-In Time’ setting for further information. If Latched is selected, the contact output will keep energized until a reset command has been received.

CONTACT OUTPUT 1 (32) OPERATIONRange: Non-Failsafe, FailsafeDefault: Non-Failsafe

This setting specifies if the behaviour of the contact output has to be normally closed (Failsafe) or normally Open (Non-Failsafe mode).

FASTPATH: From a hardware point of view, all contact outputs of the I/O card are Normally Open. That means that after a power loss or if the relay is not in READY state, the Output contact will be opened regardless of this setting.


S5 INPUTS AND OUTPUTS CHAPTER 5: SETPOINTS

BLOCK CLOSE CONTACT OUTPUT 1 (32)Range: Off, Any input from the list of inputsDefault: Off

This setting defines a block to the close of the contact output. When the selected input is asserted, the contact output will be blocked.

Figure 5-22: Output relays– logic diagram

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Virtual inputsThere are 32 Virtual Inputs that can be individually programmed to respond to Input commands entered via the relay keypad, or by using communication protocols. Virtual Input programming begins with enabling the Virtual Input function and selecting the Virtual Input Type - Self-Reset or Latched - under SETTINGS > S5 INPUTS/OUTPUTS. Next, under SETTINGS > S4 CONTROLS > VIRTUAL INPUT COMMANDS, the user assigns either an On or an Off command to the Virtual Input enabled earlier.Referring to the Virtual Inputs logic diagram below, a Virtual Input type can be selected to be either Self-Reset, or Latched. When Self-Reset is selected, and the command On is executed, the virtual input is evaluated as a pulse at rate of one protection pass. When the Latched type is selected, the On state of the Virtual Input will be latched. PATH: SETTINGS > S5 INPUTS/OUTPUTS > VIRTUAL INPUTS

VI 1 (32) NAMERange: 18 CharactersDefault: Virtual IN x

This setting defines a programmable name for the Virtual Input.

VI 1 (32) FUNCTIONRange: Disabled/EnabledDefault: Disabled

The Virtual Input is enabled and ready to be triggered when set to Enabled.

VI 1 (32) TYPERange: Self-Reset, LatchedDefault: Self-reset

When the Self-Reset type is selected, the Virtual Input will be evaluated for one protection pass only, upon “On” initiation and it will reset. When the Latched type is selected, the virtual input will keep the state “On” until reset command “Off” is initiated.


FLEXLOGIC™ CHAPTER 5: SETPOINTS

FASTPATH: See also the section S4 controls / Virtual input commands, on how to trigger a virtual input signal state.

Figure 5-23: Virtual Inputs - logic diagram

FlexLogic™

The DGCM FlexLogic™ system, defines operators, and lists of operands. In essence, all the necessary information for custom built logic. The FlexLogic tool is accessible from the EnerVista DGCM Setup program under the SETTINGS > FLEXLOGIC menu.All DGCM digital signal states are represented by FlexLogic™ operands. Each operand is in one of two states: on (asserted, logic 1, or set), or off (de-asserted, logic 0, or reset). There is a FlexLogic™ operand for each contact input, contact output, communications command, control panel command, element trip, and element alarm, as well as many others.A list of FlexLogic™ operands and operators are sequentially processed once every 4.17 ms or 5 ms, depending on the power system frequency (60 Hz or 50 Hz). When list processing encounters an operand, the value of that operand is placed in a first in - first out stack. When list processing encounters a calculation operator, the number of values required for the calculation are removed from the stack, and the result of the operation is placed back on the stack. The operators are logic gates (for example, AND, OR, NOT), timers, latches, one-shots, and assignments. Assignment operators assign the value calculated by the preceding operators to a special class of operands called virtual outputs. Like any other operand, a virtual output can be used as an input to any operator –feedback to achieve seal-in is allowed. When list processing encounters an end operator, processing is stopped until the next processing cycle, at which time it restarts at the top of the list.Each contact output has a setting to specify the operand that drives the output. Any operand may be selected – selection of a virtual output is the means by which FlexLogic™ directly controls external equipment such as the motor contractors.The operators used in FlexLogic™ conform to the following rules:

• 1024 lines for building logic are available in the FlexLogic tool. All lines are executed every 1 / 4 power system cycle (4.17 ms or 5 ms).

• A virtual output may only be assigned once within the FlexLogic environment. An unassigned virtual output will have a value of off.

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CHAPTER 5: SETPOINTS FLEXLOGIC™

FlexLogic™ operandsThe FlexLogic™ operands available in the DGCM are listed below.

Operator Inputs Description

<operand> none The output value is the value of the named <operand>.

NOT 1 The output value is “on” if and only if any of the input values are “off”.

OR 2 to 16 The output value is “on” if and only if any of the input values are “on”.

AND 2 to 16 The output value is “on” if and only if all of the input values are “on”.

NOR 2 to 16 The output value is “on” if and only if all of the input values are “off”.

NAND 2 to 16 The output value is “on” if and only if any of the input values are “off”.

XOR 2 The output value is “on” if and only if one input value is “on” and the other input value is “off”.

TIMER 1 The output value is “on” if the input value has been “on” for the set pickup time. Once the output value is “on”, it remains “on” until the input value has been “off” for the set dropout time.

LATCH 2 The output value is the state of a reset-dominant volatile bi-stable latch, where the first input value is the set input, and the second input value is the reset input.

Positive-one-shot 1 The output value is “on” for one processing cycle following an off-to-on transition of the input value.

Negative-one-shot 1 The output value is “on” for one processing cycle following an on-to-off transition of the input value.

Dual-one-shot 1 The output value is “on” for one processing cycle following either an on-to-off or off-to-on transition of the input value.

ASSIGN <operand> 1 The input value is assigned to the named operand. There is otherwise no output value.

END none The first END encountered terminates the current processing cycle.

VI1 (VI1 to VO32) On VI1 (VI2 to VI32) Off

VO1 (VO2 to VO32) On VO1Off to VO32 Off

Current Source (1 to 6) Any Phase TOC PKP Current Source (1 to 6) Any Phase TOC OP

Current Source (1 to 6) Any Phase TOC DPO Current Source (1 to 6) Phase (A or B or C) TOC PKP

Current Source (1 to 6) Phase (A or B or C) TOC OP Current Source (1 to 6) Phase (A or B or C) TOC DPO

Bus 1 any phase TOC PKP Bus 1 any phase TOC OP

Bus 1 any phase TOC DPO Bus 1 Phase (A or B or C) TOC PKP

Bus 1 Phase (A or B or C) TOC OP Bus 1 Phase (A or B or C) TOC DPO

Current Source (1 to 6) Any Phase High IOC PKP Current Source (1 to 6 Any Phase High IOC OP

Current Source (1 to 6) Any Phase High IOC DPO Current Source (1 to 6) Phase (A or B or C) High IOC PKP

Current Source (1 to 6) Phase (A or B or C) High IOC OP

Current Source (1 to 6) Phase (A or B or C) High IOC DPO

Bus 1 any phase High IOC PKP Bus 1 any phase High IOC OP

Bus 1 any phase High IOC DPO Bus 1 Phase (A or B or C) High IOC PKP

Bus 1 Phase (A or B or C) High IOC OP Bus 1 Phase (A or B or C) High IOC DPO

Current Source (1 to 6) Any Phase Low IOC PKP Current Source (1 to 6) Any Phase Low IOC OP

Current Source (1 to 6) Any Phase Low IOC DPO Current Source (1 to 6) Phase (A or B or C) Low IOC PKP

Current Source (1 to 6) Phase (A or B or C) Low IOC OP

Current Source (1 to 6) Phase (A or B or C) Low IOC DPO

Bus 1 any phase Low IOC PKP Bus 1 any phase Low IOC OP



Bus 1 any phase Low IOC DPO Bus 1 Phase (A or B or C) Low IOC PKP

Bus 1 Phase (A or B or C) Low IOC OP Bus 1 Phase (A or B or C) Low IOC DPO

Current Source (1 to 6) Neutral IOC PKP Current Source (1 to 6) Neutral IOC OP

Current Source (1 to 6) Neutral IOC DPO Bus 1 Neutral IOC PKP

Bus 1 Neutral IOC OP Bus 1 Neutral IOC DPO

Current Source (1 to 6) Any Phase UC PKP Current Source (1 to 6) Any Phase UC OP

Current Source (1 to 6) Any Phase UC DPO Current Source (1 to 6) Phase (A or B or C) UC PKP

Current Source (1 to 6) Phase (A or B or C) UC OP Current Source (1 to 6) Phase (A or B or C) UC DPO

Bus 1 any phase UC PKP Bus 1 any phase UC OP

Bus 1 any phase UC DPO Bus 1 Phase (A or B or C) UC PKP

Bus 1 Phase (A or B or C) UC OP Bus 1 Phase (A or B or C) UC DPO

Voltage Source 1Any Phase OV PKP Voltage Source 1 Any Phase OV OP

Voltage Source 1 Any Phase OV DPO Voltage Source 1 Phase (A or B or C) OV PKP

Voltage Source 1 Phase (A or B or C) OV OP Voltage Source 1 Phase (A or B or C) OV DPO

Voltage Source 1 Any UV PKP Voltage Source 1 Any UV OP

Voltage Source 1 Any UV DPO Voltage Source 1 Phase (A or B or C) UV PKP

Voltage Source 1 Phase (A or B or C) UV OP Voltage Source 1 Phase (A or B or C) UV DPO

Voltage Source 1 Any Phase Loss PKP Voltage Source 1 Any Phase Loss OP

Voltage Source 1 Any Phase Loss DPO Voltage Source 1 Phase (A or B or C) Loss PKP

Voltage Source 1 Phase (A or B or C) Loss OP Voltage Source 1 Phase (A or B or C) Loss DPO

Current Source (1 to 6) Neutral TOC PKP Current Source (1 to 6) Neutral TOC OP

Current Source (1 to 6) Neutral TOC DPO Bus 1 Neutral TOC PKP

Bus 1 Neutral TOC OP Bus 1 Neutral TOC DPO

Cold Load Pickup Cold Load Pickup OP

Cold Load Pickup DPO Current Source # Current Unbal PKP

Current Source # Current Unbal OP Current Source # Current Unbal DPO

Voltage Src # Voltage Unbal PKP Voltage Src # Voltage Unbal OP

Voltage Src # Voltage Unbal DPO Any Alarm PKP

Any Alarm OP Any Alarm DPO

Not Config Alarm PKP Not Config Alarm OP

Not Config Alarm DPO Internal Fault Alarm PKP

Internal Fault Alarm OP Internal Fault Alarm DPO

Comm Fail Alarm PKP Comm Fail Alarm OP

Comm Fail Alarm DPO G1 Active OP

G2 Active OP G3 Active OP

Dummy CB OP Current Source (1 to 6) OC Block OP

Bus 1 TOC Block OP Current Source (1 to 6) High IOC Block OP

Current Source (1 to 6) High IOC Block DPO Bus 1 High IOC Block OP

Current Source (1 to 6) Low IOC Block OP Bus 1 Low IOC Block OP

Current Source (1 to 6) Neutral IOC Block OP Current Source (1 to 6) Neutral IOC Block DPO

Bus 1 Neutral IOC Block OP Current Source (1 to 6) Any Phase Block OP

Current Source (1 to 6) Any Phase Block DPO Bus 1 Any Phase Block OP

Voltage Source Any Phase OV Block OP Voltage Source Any Phase UV Block OP

Voltage Source Any Phase Loss Block OP Current Source (1 to 6) Neutral TOC Block OP

Bus 1 Neutral TOC Block OP Any Block OP

G Change Block OP Selftest Block OP

VOL Src# Ph A VDI Swell PKP VOL Src# Ph B VDI Swell PKP

VOL Src# Ph C VDI Swell PKP VOL Src# Ph VDI Swell PKP


CHAPTER 5: SETPOINTS FLEXLOGIC™

VOL Src# Ph A VDI Swell OP VOL Src# Ph B VDI Swell OP

VOL Src# Ph C VDI Swell OP VOL Src# Ph VDI Swell OP

VOL Src# Ph A VDI Swell DPO VOL Src# Ph B VDI Swell DPO

VOL Src# Ph C VDI Swell DPO VOL Src# Ph VDI Swell DPO

VOL Src# Ph A VDI Sag PKP VOL Src# Ph B VDI Sag PKP

VOL Src# Ph C VDI Sag PKP VOL Src# Ph VDI Sag PKP

VOL Src# Ph A VDI Sag OP VOL Src# Ph B VDI Sag OP

VOL Src# Ph C VDI Sag OP VOL Src# Ph VDI Sag OP

VOL Src# Ph A VDI Sag DPO VOL Src# Ph B VDI Sag DPO

VOL Src# Ph C VDI Sag DPO VOL Src# Ph VDI Sag DPO


Multilin DGCM

Chapter 6: Commands

GEDigital Energy

Commands

PATH: MAIN MENU > COMMANDS

RESETRange: No, YesDefault: No

This command is use to reset all LEDs and latched alarms.

CLEAR ENERGYRange: No, YesDefault: No

This command is used to clear all the energy values.

RESET POSITIVE REAL ENERGYRange: No, YesDefault: No

This command is used to RESET the value for Positive Real Energy.


CHAPTER 6: COMMANDS

RESET NEGATIVE REAL ENERGYRange: No, YesDefault: Disabled

This command is used to RESET the value for Negative Real Energy.

RESET POSITIVE REACTIVE ENERGYRange: No, YesDefault: Disabled

This command is used to RESET the value for Positive Reactive Energy.

RESET NEGATIVE REACTIVE ENERGYRange: No, YesDefault: Disabled

This command is used to RESET the value for Negative Reactive Energy.

CLEAR POWER QUANTITY STATISTICSRange: No, YesDefault: No

This command is used to clear the power quantity statistics values.

CLEAR SAG RECORDSRange: No, YesDefault: No

This command is used to clear the voltage sag record values.

CLEAR SWELL RECORDSRange: No, YesDefault: No

This command is used to clear the voltage swell record values.


Multilin DGCM

Chapter 7: Maintenance

GEDigital Energy

Maintenance

The DGCM allows you to monitor the device for detailed product information, it’s operating temperature, and collected operational data.

Figure 7-1: Maintenance Menu

M1 Product information

The product information table provides information such as the DGCM name, order code, firmware revision, boot code, serial number, etc. This is the place where one verifies whether updates have been performed correctly on the device


M2 PRODUCT MAINTENANCE CHAPTER 7: MAINTENANCE

PATH: MAINTENANCE > M1 PRODUCT INFO

PRODUCT NAMERange: alpha-numeric name of up to 18 characters Default: Motor Name

ORDER CODEDGCM-AEHSSCPXXXX

This screen shows a DGCM Order Code.

FIRMWARE VERSION3.0

This screen shows the relay Main Firmware Version.

BUILD DATEAug 16 2010

This screen shows the relay Main Firmware Build Date.

BUILD TIME16:32:38

This screen shows the relay Main Firmware Build Time.

BOOT REVISION1.20

This screen shows the relay Boot Code Revision.

BOOT CODE DATEDec 11 2013

This screen shows the relay Boot Code Build Date.

BOOT CODE TIME10:44:54

This screen shows the relay Boot Code Build Time.

SERIAL NUMBERML0A08M00133

Each DGCM relay has a unique serial number.

DSP VERSION1.01

This screen shows the DGCM relay DSP Version.

DSP DATEJun 4 2013

This screen shows the DGCM relay DSP Date.

DSP TIME12:57:22

This screen shows the DGCM relay DSP Time.

M2 Product maintenance

PATH: MAINTENANCE > M2 PRODUCT MAINTENANCE


CHAPTER 7: MAINTENANCE MODBUS ANALYZER

INTERNAL TEMP57.0°C 134.6°F

This screen displays the actual temperature inside the DGCM.

Modbus analyzer

PATH: MAINTENANCE > MODBUS ANALYZER

UPDATE FIRMWARE

This screen displays the status of the request for a firmware update inside the DGCM.

Update firmware

PATH: MAINTENANCE > UPDATE FIRMWARE


UPDATE FIRMWARE CHAPTER 7: MAINTENANCE

UPDATE FIRMWARE

This option initiates loading new firmware into the DGCM flash memory from a local PC. See Chapter 3 Interfaces, section Software setup / Upgrading firmware for details.

UPDATE FIRMWARE BY TFTP

This option initiates loading new firmware into the DGCM flash memory from a TFTP server. See Chapter 3 Interfaces, section Software setup / Upgrading firmware for details.


Multilin DGCM

Chapter 8: Applications

GEDigital Energy

Applications

This section provides various application examples for setting up the DGCM Field RTU device.

System configuration examples

The DGCM is designed to provide a great amount of flexibility for system configuration. This section provides application examples of some important system configurations with their corresponding settings.

Example 1The figure below illustrates a typical distribution transformer substation. The substation has an 800 KVA, 11 KV/240 V transformer feeding six outgoing feeders through a 3000 A distribution bus. Refer to the Typical Wiring Diagram figure (see the Electrical installation section) in this manual, for connecting conventional CT/VTs with the DGCM device.


SYSTEM CONFIGURATION EXAMPLES CHAPTER 8: APPLICATIONS

Figure 8-1: System layout for Example 1

For this 6-feeder example, the selected DGCM v2.0 device’s ORDER CODE is DGCM-AEHSSACCXXXX. This order code allows for one voltage input with a traditional VT input, two current input cards (with a total of 18 traditional CTs, i.e., six 3-phase CTs at input).The traditional 500/1 CTs can be configured at the following PATH: S2 SYSTEM SETUP > CURRENT SETUP (see below) with an example of Feeder 1 CT configuration using Current Source 1. Similarly, all 6 feeders’ CTs can be configured using Current Source 1 through 6 by enabling all the current source configurations. The feeder bus is configured as Bus 1.

Figure 8-2: Current Setup screen

Feeder 1 Feeder 2 Feeder 3 Feeder 4 Feeder 5 Feeder 6

1/1

DY 11

800 KVA

11 kV/ 240V

Bus 1,

I = 3000A

500/1

CB1

500/1500/1500/1500/1500/1

CT-1

VT-1

CT-6CT-5CT-4CT-3CT-2


CHAPTER 8: APPLICATIONS SYSTEM CONFIGURATION EXAMPLES

The Voltage Source used in the setup needs to be configured at the following PATH: S2 SYSTEM SETUP > VOLTAGE SETUP. The VT used in this application has a ratio of 1 with secondary rated voltage 240 volts. This Voltage Source 1 is already configured at Bus 1 in the Current Source Setup screen.

Figure 8-3: Voltage Setup screen

The next step is the Bus setup. The rated bus current, which is 3000 A in this example, needs to be configured at following path PATH: S2 SYSTEM SETUP > BUS SETUP. This value is considered as the base value for the bus protection alarm element.

Figure 8-4: Bus Setup screen

Example 2The figure below illustrates a typical distribution transformer substation. The substation has a 15 MVA, 33 kV/11 kV transformer feeding three outgoing feeders through a 1000 A distribution bus. Rogowski coil current sensors at each of the six feeders and a LEA (Low Energy Analog) Voltage sensor at the bus are installed for the measurement of individual feeder currents and bus voltage. In addition, the digital I/Os are included in this application to obtain status and control of the breakers. Refer to the Typical Wiring diagram (see the Electrical installation section) in this manual for connecting the Rogowski coil, LEA sensor, and digital I/Os to the DGCM device.



Figure 8-5: System layout for Example 2

For this 3-feeder example, the selected DGCM v2.0 device’s ORDER CODE is DGCM-BEHSSAFXPXXX. This order code allows for one low voltage input card, one current input card with Rogowski coil current sensors, and one digital I/O card (16 digital inputs and 8 digital outputs).The Rogowski coils can be configured at the following PATH: S2 SYSTEM SETUP > CURRENT SETUP (see below). The Current setup screen shown below is an example of the Feeder 1 coil sensor configuration using Current Source 1. Similarly, all 3 feeder coils can be configured using Current Source 1 through 3 by enabling all the current source configurations.The rated primary current of the Rogowski coil needs to be configured. The conversion factor to obtain the output voltage at secondary is already considered in this product for Multilin’s Rogowski coil. The Sensor Phase Shift setting is a design parameter that should be obtained from the Data Specification Sheet of the coil. This parameter is applied to all 3-phase Rogowski coil, which is set to 0.5° in this example. The other two settings are for an individual phase Rogowski coil. Magnitude and phase correction factors are based on the calibration of each individual coil and these values are provided on the sticker placed on the coil. Sensor number 1 through 3 is applied to the 3-phase current sensor sequence wired to the DGCM device.The feeder bus is configured as Bus 1 and the voltage source connected to this bus is configured as Voltage Source 1 (which is configured in the next step).

Feeder 1 Feeder 2 Feeder 3

DY 11

15 MVA

33 kV/ 11 kV

Bus 1,

I = 1000A

250/1

CB1

To Digital

I/Os

Rogowaski

Coil Sensor

coil (1/2/3)

Rogowaski

Coil Sensor

coil (1/2/3)

Rogowaski

Coil Sensor

coil (1/2/3)

LEA Voltage

Sensor(1/2/3)

250/1

250/1


CHAPTER 8: APPLICATIONS SYSTEM CONFIGURATION EXAMPLES

Figure 8-6: Current Setup screen

The LEA (Low Energy Analog) voltage sensor is used to measure 110 V bus voltage. The configuration of the LEA voltage input into the DGCM can be configured in the voltage setup screen. The VT ratio and rated secondary values need to be configured for the LEA. In this example, the voltage divider ratio (obtained from the sensor data sheet) of the sensor is 1400:1 and the rated secondary voltage is 7.8 V (i.e., 11 kV/1400). In addition, the phase angle value can be set from the Data Specification sheet, if provided by the manufacturer. In addition, the magnitude and phase correction values can be set and applied either from the Data Specification sheet or the LEA sensor, if provided on the sensor by the manufacturer.

FASTPATH: The allowable voltage sensor range is from 0 V to 10 V, and maximum up to 15 V.

PATH: S2 SYSTEM SETUP > VOLTAGE SETUP

Figure 8-7: Voltage Setup screen



The next step is the Bus setup. The rated bus current, which is 1000 A in this example, needs to be configured at following PATH: S2 SYSTEM SETUP > BUS SETUP (see below). This value is considered as the base value for the bus protection alarm element.

Figure 8-8: Bus Setup screen


CHAPTER A: APPENDIX A CHANGE NOTES

Table of contents

Appendix A

Change notes

Revision history

Table A–1: Revision History

MANUAL P/N RELEASE DATE

1601-9208-A1 December 2012

1601-9208-A2 June 2013

1601-9208-A3 March 2014

Table A–2: Major Updates for A3 DGCM Instruction Manual

PAGE NUMBER CHANGES

Manual revision from A2 to A3

Chapter 1 Overview updated to include Current Unbalance, Voltage Unbalance, and Voltage Disturbance Indicator (sag and swell)

Chapter 4 Added Actual Values for Voltage Disturbance Indicators

Chapter 5Added Setpoints for Current Unbalance, Voltage Unbalance, Voltage Disturbance Indicators, and Cold Load PickupAdded IEC 104 to the Communications section

Chapter 4, 5 Updated internal modem settings and actual values

General Minor corrections and additions

Table A–3: Major Updates for A2 DGCM Instruction Manual

PAGE NUMBER CHANGES

Manual revision from A1 to A2

Cover updated image and added global technical support numbers

Chapter 1 updated images and order codes, added inputs/outputs & metering specifications and new Applications section

Chapter 2 updated and added images; updated content added new installation section

Chapter 3 updated images and software setup instructions

Chapter 4 added images, modem, and contact input/output information; updated current source information

Chapter 5 updated images and contents

Chapter 7 added image and modbus analyzer section

Chapter 8 added new chapter for applications

MULTILIN DGCM – INSTRUCTION MANUAL A-1

CHANGE NOTES CHAPTER A: APPENDIX A

A-2 MULTILIN DGCM – INSTRUCTION MANUAL

Multilin DGCM Field RTU Instruction Manual GENERAL SAFETY PRECAUTIONS • Thoroughly and carefully...

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