Consumer Energy Meter (CEM)

Users Manual

(Document Ver- BGX 501-147 R02)

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Foreword

Entity 3

Table of Contents Foreword 4 Concept 4 Basic Measurement Principle 5

General Description 6 External Features 6

Technical Features 8 Energy Registers 8 Maximum demand and MD Integration Period 8 Maximum demand reset 8 Maximum demand reset counter 9 Cumulative demand register 9 The Load Survey 9 Data Communication 9 Meter ID and Baud Rate configuration: 10 Interpretations of MODBUS registers in external units 10 Scaling information received from meter using MODBUS protocol 11

Security 13 Tamper & fraud detection & logging 13 Calibration LED 14 Scroll Locking 14

Real Time Clock & Time Synchronization 15 LCD Description 15 Display Parameters Detail 16 Installation 16 Mounting 16 Connections 17

APPENDIX-A 18 Connection Diagrams 18

Safety Precautions 19 Calibration of Meter 19 Definitions 20 Company Note 20 Annexure: Display Parameters Details 21 Push Button Mode Displays 21

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Foreword

Though the operation of the METER is simple, we recommend a thorough reading of this manual before you start any operation, installation, testing or use. The METER is very sturdy and will generally withstand the rough handling it will encounter in the field. However, reasonable care in handling will ensure a long trouble free service. Sufficient care has been taken to provide all information regarding the product. However Secure Meters Ltd. (SML) will not be responsible for any wrong application, misuse, wrong installation or any consequential damage.

Concept

The CEM energy meter is an all-electronic, solid state polyphase energy meter which accurately measures all parameters of the supply voltage, current, power factor, active load, reactive load, apparent load etc., in addition to active, reactive and apparent energies (As the case may be). The CEM energy meter is designed around an Application Specific Integrated Circuit (ASIC) based micro-controller with its own programming language. It also has a high degree of programmability to accommodate various types of applications and tariffs.

The Secure energy metering system (SEMS) provides a total solution to energy metering. It is not a meter alone, or energy billing computer but an all-encompassing system that covers all these aspects. It offers in one package a complete system for the analysis of power and revenue.

From a systems perspective, there are three parts of "SEMS CONCEPT"

The Consumer Energy Meter (CEM), an intelligent metering

device installed at the consumer's premises / large electrical machines for metering i.e. an Electronic energy meter in place of the age old Ferraris disc meter.

The METER READING INSTRUMENT (MRI), an instrument used by

the meter reader, for electronically collecting the meter readings and other performance data from the CEM.

The BASE COMPUTER SYSTEM (BCS), computer system software

to interpret the readings and other data received from the Meter Reading Instrument and present this vital energy/demand related information in a user-friendly format.

This document restricts itself to describing the CEM, which is the Consumer Energy Meter.

Foreword

Entity 5

Basic Measurement Principle

An analogue to digital converter is used to sample voltage & current relative to incoming waveform.

High sampling rate gives exceptionally accurate results. A very highly reliable non- volatile memory (NVM) can

retain the data up to a period of 10 years even if there is no power.

The data from the non-volatile memory can either be

displayed on the LCD display or can be communicated via an optical communication port on to a hand-held MRI.

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General Description

External Features

The front face of the projection type meter is as shown in the above figure. The different parts visible are described as under:

1. Rating Plate: This provides information on meter type, accuracy class, voltage & current ratings, serial number etc.

2. Digital Display: The meter shall use the LCD display

defined as follows:

Value - Seven large Seven segment characters, with decimal points and colons

Text & Index - Five small twelve segment alphabetic Characters

Annunciators - Twelve (12) assorted annunciators which can indicate: Direction - import, export, lag and lead Quantity - W, Wh, VAR, VARh, VA, Vah, V, A Multiplier - k, M or MK for representation

of Giga

General Description

Entity 7

3. Terminal Block: This is a standard terminal block

compatible with conventional meter installation methods. The voltage terminals and current terminal are clearly marked and differentiated.

4. Optical port: It is used for communicating with Meter Reading Instrument (MRI) or to any other external devices like Remote Terminal Unit.

5. RH Push Button: The front face of the meter has two

push buttons. The one on the right hand side is used to cycle through the display quantities in forward direction. On pressing the button, the display can be activated. While the display is activated, if the button is pressed again, the display cycles to the next quantity.

6. LH push button: This button is the left one of the two

buttons on the face of the meter. This button can be used as either MD reset push button or reverse scrolling of display parameters (Factory Programmable).

7. Calibration LED: Calibration LED is used to test the

meter accuracy when all the currents are flowing in one direction. For detail refer Technical features clause Calibration LED.

8. Sealing screws: Sealing screws are provided to seal the meter body. The screw has a transverse hole in its head for providing sealing with the help of wire and lead seal.

9. Terminal Block Cover: Transparent Extended Terminal Cover covers both the meter mounting screws and the leads coming into the meter. ETBC (Extended Terminal Block Cover) is installed using two sealable screws. Transparent ETBC enables easy inspection of connections to meter.

10. Remote Power Unit (RPU): To enable meter reading

during power outage, this port can be used to power up the meter for reading purpose. A Power Pack Unit when inductively coupled with the meter through this port can provide necessary power for meter reading & display. This eliminates the need of permanent battery backup.

11. RS 485 port: The meter TOP hat has RS 485 port (RJ 11

connecter) for online communication over Modbus. The purpose of the PREMIER MODBUS communications protocol is to allow measured data and setup information to be efficiently transferred between a MODBUS Master Station and PREMIER. This allows interrogation of all data measured by PREMIER, which are exported via the MODBUS Slave PREMIER Module.

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Technical Features Energy Registers

The Meter is capable of measuring Active, Reactive, and Apparent energies.

Maximum demand and MD Integration Period The meter is programmed for a Maximum Demand (MD) integration period of 30 minutes. The demand is monitored during each demand interval set with 30 Minutes integration and the maximum of these demands is stored as Maximum Demand. Whenever the Maximum Demand is reset, the maximum demand value so registered shall be stored along with date and time. The meter is capable of registering maximum demand with the date and time of its occurrence at BCS end. Meter can compute MD for Active and Apparent load. The Universal (0 24 Hours) Maximum Demand: A separate register shall be present to record the maximum demand for 24 hours, since last reset known as universal demand register. The TOD Maximum Demand: The meter contains provision for time of day (TOD) demand computation whereby the user can define up to 8 time zones in 24 hours cycle to cover morning and evening peak and OFF peak periods separately. The timings of these TOD registers are configurable through Tariff Change Transaction with the help of MRI. Time Of Day Tariff Energy Registers. The meter contains provision for multiple tariffs metering (time of day metering). The meter is capable of being set into a maximum of eight non-overlapping time zones in 24-hour cycle to cover morning and evening peak and OFF peak periods separately. Presently meter has been programmed for five time zones. The timings of these rate registers are configurable through Tariff Change Transaction with the help of MRI.

Maximum demand reset

Maximum Demand can be reset by one of the following mechanisms. The supplied meter may have one or more options given below-

1. Manually by operation of a button with a sealing arrangement.

2. Through Meter Reading Instrument in the form of an authenticated command.

3. Automatically at the end of certain period defined as Bill Dates in the Meter.

Technical Features

Entity 9

Maximum demand reset counter

Whenever the maximum demand is reset, this counter is incremented by one and MD reset counter is maintained by meter to keep track of MD reset operations.

Cumulative demand register

Cumulative demand (CMD) is the sum of all the 0-24 hrs maximum demand which have been reset so far. This register along with MD reset counter helps in detecting any unauthorised MD Reset performed.

The Load Survey

Load survey is a database of load values during predefined interval of time. Load survey contains database for different types of parameters for predefined number of days & number of parameters as per CEM configured at the time of manufacturing based on customer requirement. Load survey configured in meter for main energies and instantaneous parameter with 30 minutes integration period. The data can be read by MRI and dumped on the Base Computer Software. This can be viewed in the graphical form and these data can also be converted to a spreadsheet with the help of BCS.

Data Communication

The meter has an infra-red coupled isolated serial interface. Physical arrangement is such that it ensures positive alignment of opto devices and it can be sealed independently to prevent any unauthorised communication.

The meter communicates with the Meter Reading Instrument (MRI). By this facility user can take reading of metering data, load survey and tamper events. Also, if authorised from BCS, MD can be reset, tariff and billing dates in meter can be changed. For detailed operations of MRI, please refer the MRI manual.

The meter has additional communication port in the

top hat i.e. RS 485 port (RJ 11 connecter) which communicates over Modbus. The purpose of MODBUS communication protocol is to get meter information, instantaneous parameters, and cumulative energies over serial communication and it is also an open communication protocol.

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Meter ID and Baud Rate configuration:

By default, Meter ID and its baud rate on MODBUS network are 1 and @4800 respectively. They can be configured through PACT port only, available on the meter front cover, in one of the following ways:

o Using MRI terminal mode, o Using BCS software Smart 2000, terminal mode, o Using Windows Hyper terminal.

User may change meter ID from 1 to 247 Number. Say wish to keep the meter ID no 2 or 22 or 222 then user need to give iD=2, iD=22, iD=222 respectively. Meter will reply &FC for correct query and echo back for not accepting.

Similarly, User may change MODBUS baud rate BR from

1200 or 2400 or 4800 or 9600 or 19200. Say wish to keep the meter BR at 1200 or 2400 or 4800 or 9600 or 19200 then user need to give bR=2 or 7, bR=3, bR=4, bR=5, bR=6, respectively. Here bR=2 and 7 are same for 1200 baud. Meter will reply &FC for correct query and echo back for not accepting.

To read the Meter ID, simply type ID (block letters)

and press enter to get the set value. Similarly, for Baud rate, type BR (block letters) and press enter to read the set value.

Interpretations of MODBUS registers in external units PREMIER doesnt measure smaller quantities of voltage, current and power, which it needs to interpret as the large quantities in the circuit. Commissioning sets up PREMIER so that it interprets the values it measures as the values in the circuit. Following calculations are required to get data in external unit. Different values of MF High (Meter Factor) and their resolutions are as follows

Meter Factor MF (High)

Energy Multiplier

2D 1 Wh 2E 0.01 kWh 2F 0.1 kWh 30 1 kWh 31 0.01 MWh 32 0.1 MWh 33 1 MWh 34 0.01 GWh 35 0.01 GWh

NOTE: All values send by PREMIER in MODBUS registers are in hexadecimal. Exponents and Divisors are occupies one nibble i.e. four bits. All the exponents are signed, 2s complement values. All divisors are unsigned values.

Technical Features

Entity 11

Scaling information received from meter using MODBUS protocol VX (Low) Voltage scaling (Exponent) VX (High) Voltage scaling (Exponent) in the MS nibble & DI in the LS nibble IX (High) Current scaling (Exponent) IX (Low) Current scaling (Divisor) PX (High) Power scaling (Exponent) PX (Low) Power scaling (Divisor) MF (High) Energy multiplier (Exponent)

Example If PREMIER is commissioned at 11KV/110V and 100Amp/5Amp then the above factor send by PREMIER will be as follows: VX (High) = 0F = -1; DI =2; IX (High) = 0F = -1; IX (Low) = 05 = 5; PX (High) = 01 = 1; PX (Low) = 05 = 5; MF (High) = 30 = 0, MF (Low) = 10 Derive following factor from above information IFAC = IX (High) = -1 PFAC = MF (High) + 1 = 0+ 1 = 1 VFAC = PFAC IFAC = 1 (-1) = 2 Note: If DI = 10 then PFAC = PFAC-1 Meter information Meter Serial Number Meter Serial number SrN and SfN will be in ASCII HEX (8 bytes) Example VALUE RETURNED 50 52 49 30 39 31 35 31 WILL BE INTERPRETED AS PRI39151 Meter Software Name Meter software name will be in ASCII HEX (1+7 bytes) Example Value returned 01 41 33 30 41 47 30 31 will be interpreted as 1st byte will be reading type which is 01 and remaining 7 will be A30AG01. Meter Real Time Real time will be in unit of seconds since 1 JAN 1988 00:00:00 Hr. this will be treated as zero. Example Value returned 19 38 CF C5 will be interpreted as 14:42:04 hr of 29th May 2001 Firmware Name Interpretation: Firmware name will be in ASCII HEX (1+7 bytes) Example Value returned 50 52 45 30 30 30 30 31 will be interpreted as PRE0001. Protocol Version and Revision: Value returned 03 00 will be interpreted as Version 03 and Revision 00.

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Instantaneous Parameters VOLTAGE VALUE = RECEIVED VALUE*10^ (VFAC-3) VOLTS Example: If Value received from MODBUS registers are 0001B90C. It will interpret as follows: Voltage value = (01B90C) * 10^ (2 3) = 11290.8 Volts = 11.2908 kilo Volts. Line Current CURRENT VALUE = ((RECEIVED VALUE/IX LOW)*10^ (IFAC-3)) AMPS Example: If Value received from MODBUS registers are 0002952E. It will interpret as follows: CURRENT VALUE = ((02952E/5)*10^ (-1-3)) = ((169262/5)*10^ (-4)) = 3.38524 AMPS Instantaneous Power value Power value = ((Received value/PX low)*10^ (PFAC-1)) Watts, Example: If Value received from MODBUS registers are 00046E84. It will interpreted as follows Power value = ((046E84/5)*10^ (1-1) = ((290436/5)*1) = 58087.2 = 58.0872 kWatts. Power factor Power factor value verification = (Value)/1000 Example: Value received from MODBUS register is FC8C which will be -0.883. If power factor is leading then received values will be 2s complement as illustrated in above example. Phase angles Phase Angle Value = ((Value * 360) / 65535) Example: Value received from MODBUS register is D543h= 54595d. It will be interpreted as: Phase Angle Value = ((54595 * 360) / 65535) = 299.9 DEGREE. Frequency Supply Frequency = (Value / 1000) Example: Value received from MODBUS register is C49C which will be 50.332 Hz. Baudrate BR (baudrate) 2,3,4,5 and 6

2 for 1200 baudrate 3 for 2400 baudrate 4 for 4800 baudrate 5 for 9600 baudrate* 6 for 19200 baudrate*

* Only if meter supports the baud rate.

Technical Features

Entity 13

Energy values Energy value = (Received value * Meter Factor) Example: Value received from MODBUS register is 0000 0058h = 88d and MF (High) = 30, from MF (high) table multiplier of energy will be 1 kWh. This will give energy value = 88 kWh.

Security

An essential requirement of any equipment handling financial transactions is security. Several security methods are incorporated to prevent unauthorised access to the meter.

When the meter is security locked, it allows readings to be taken and load surveys to be gathered but no changes can be made which could affect the metering functions. The security system virtually eliminates any fraud or tamper attempts on the meter.

Tamper & fraud detection & logging

The special software in consumer energy meter detects & reports conditions of tampers and fraud like missing potential, CT polarity reversal, current missing, power on/off etc. along with date and time. a) Missing Potential: The meter is capable of recording occurrences of missing potential phase wise. Missing potential is checked only when load is above threshold value. Tamper is restored whenever the condition normalises. All such recordings are accompanied by date and time of occurrence.

b) Missing Current: The meter is capable of recording occurrences of missing current phase wise. Missing current is checked only when phase voltage is present and phase current is less than defined threshold value. Tamper is restored whenever the condition normalises.

c) Current Circuit Open: The meter has the capability to record opening of one or two Current circuits connected to the meter along with date and time. (It is applicable for 3 phase 4 wire meters only).

d) Current Circuit bypassing: The meter has the capability to record bypassing of one or two Current circuits connected to the meter along with date and time. (It is applicable for 3 phase 4 wire meters only). e) Current Unbalance: If there is unbalance in load conditions above a particular threshold limit, meter will detect this condition as Current unbalance and log this as a tamper event.

f) Power On/Off: Meter detects this condition when all the voltages goes below a particular level where meter stop functioning.

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g) Magnetic Influence: The Meter has the capability of detecting and recording of presence of abnormal magnetic influence near the meter, if the magnetic influence affects the meter functionality. h) Voltage unbalance: If there is unbalance in voltage conditions above a particular threshold limit, meter will detect this condition as Voltage unbalance and log this as a tamper event.

i) Neutral Disturbance: Meter will detect neutral disturbance if any spurious signal is applied at the meters neutral.

All the events log has been divided into different compartments. The tamper information shall be logged on first-in-first-out basis. Each compartment shall in itself be of rollover type. Note: The meter works accurately irrespective of phase sequence of the supply

Calibration LED

It shall be possible to configure the meteorological output (LED) between main energy registers (i.e. active/reactive/apparent). This shall be done with display scroll down/up push button. On power up, the meteorological output shall be for active energy. The push button press changes the meteorological output to the current unit register being displayed. The meteorological output shall then remain for the last current energy register displayed by the push button. The auto display does not affect the meteorological output.

Scroll Locking

CEM has the facility to continuous display of desired parameter, which is available in the Push Button Display Sequence to facilitate meter reading for particular parameter. Following procedure should be adopted to scroll lock a parameter:

1. With the RH button, select the desired parameter from push button mode, which is to be locked continuously for display.

2. Now press the RH button again and without releasing it

hold it pressed for another five seconds on the desired parameter to be logged, as the button is pressed on desired parameter the display will go on to the next display, as soon as the long push is over display will jump back to previous parameter giving indication that parameter has been locked.

3. Under lock mode no Auto display sequence will be

running, but the manual displays will be enabled. Under lock mode even in the case of power Interruption, display will come to the locked parameter after power up..

Real Time Clock & Time Synchronization

Entity 15

4. For releasing the lock press the same button for long push on any parameter till the LCD test (first parameter defined in manual display sequence) comes on display, this will indicate that lock has been released and the normal displays will be running now.

Real Time Clock & Time Synchronization

The clock enables the meter to keep track of real time and calendar as features like TOD energy, TOD MD, and event log are done on real time basis. The unavoidable drift in RTC time is automatically taken care of whenever the meter is read by MRI provided the drift falls with in prescribed limits.

LCD Description

This section is provides you detail understanding of display scheme used on LCD of meter. The LCD can be divided in five major sections, which are used for indicating different information about the meter. Following figure shows various sections and their significance. Detail of these is as follows:

- Seven Segment Seven digit Display: This section consists of seven characters of seven-segment display. In general, it is used for value/information of display parameters.

- Annunciations: This section is made of five twelve

segment characters. This section displays the parameter legends analogues to the parameter available on the meter display and parameter index.

- Direction Indicator: This section indicates direction

of flow of energy import or export as well as lagging or leading status as per the associated parameter available on the meter display.

Shows value of parameter and other details with

seven segment seven digit 7 x 7-Segment Display

Shows display legends & parameter index and other

details with five alphanumeric characters 5 x 13-Segment Display

Unit Indicator Shows unit of displayed

parameter with combinations of M, K,

V, V, A, r & h

Status Indicator for Import, Export, Lag and

Lead respectively

Phase Status

Indicator

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- Phase Status Indicator: 1, 2 and 3 represent R, Y and B phase voltage fed to the respective meter terminal. These indicators will show the healthiness of phase voltages. There are three different states of each indicator: ON, OFF and Blinking. Each of this states of a digit is used to represent different condition of corresponding phase which are as follows: ON: Voltage condition of the corresponding

phase is healthy or voltage above the define limit.

OFF: Voltage condition of the corresponding

phase is unhealthy or voltage below the define limit.

Blinking: Any abnormal electrical condition persists in the meter. It may be the possibility that voltage angle of the meter is not valid, current is below defining limit or current reversal is persists in the meter. Under this condition, review the meter connection and make the correct connection in the meter. Connection check display is available in the meter display to know actual indicators status with details. Indicators will resume to normal mode if all condition are OK.

Display Parameters Detail

We are furnishing here the ANNEXURE with the details pertaining to the display parameters supported in CEM in auto display as well as push button mode. Please refer ANNEXURE at last in manual for display details. However it may not be possible to have all display in one CEM as displays configured in CEM depend upon hardware supported and software configured in CEM.

Note: For connections, please refer to relevant connection diagrams in Appendix-A.

Installation Mounting

The meter has two mounting holes each 5.5 mm diameter in the terminal block and one key slot on the back side of cover. These holes are to be drilled in the panel as shown in the figure. Make a M4 size tapping on the top hole and fix one screw of M4 size keeping it out about 5 mm. The meter is first supported on the screw by the key hole then it is mounted using two screws and nuts each of M4 size on the panel. Then tighten the nuts from the backside of panel. Necessary mounting kit is provided with the meter.

Installation

Entity 17

Dimensions and Mounting details (All dimensions are in mm.)

Connections

Making connections to CEM is very simple and similar to electromechanical meters. On removal of terminal block cover, you get easy access to terminals. Wires shall be crimped on to lugs & inserted into terminal block from bottom entry. Ensure that all wires are firmly secured by two terminal screws on terminals. The connections shall be made as per the connection diagrams shown in Appendix-A depending on meter type. A suitable connection diagram label is also fixed on inside of terminal block cover. A changed phase sequence would not affect the functioning of meter. After powering up the meter display can be checked in the sequence as described earlier. The meter display goes off during a power cut but the energy readings are stored in the registers of the Non Volatile Memory. The readings can be retrieved after power is restored. WARNING: Proper voltages and currents to the meter as per the rating plate details of meter are to be given for normal operation.

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APPENDIX-A Connection Diagrams

A) E3V TYPE METER:

Figure 1: Connection diagram of CT/PT Operated HT (3P3W) Meter (E3V)

B) E3M TYPE METER.

Figure 2: Connection Diagram of CT/PT operated HT (3P4W) Meter (E3M)

Figure 3: Connection diagram showing HT 3P 4W system used as 3P 3W system

Safety Precautions

Entity 19

C) E3T TYPE METER:

Figure 4: Connection diagram of the Meter With fourth CT in Neutral

Fourth CT connection should be made as shown in figure 2.

Note if 4th CT connection is not connected false CT open/Bypass tamper will be detected by the meter.

Figure 5: Connection diagram of the Meter without neutral CT

Safety Precautions

The meter should be installed by trained personnel. Special care should be taken while making CT connection, it is recommended that CT connection's should be made when load is off, however if it is connected on load then CT secondary should be shorted on TTB terminal and in no case it should be kept open circuited. In addition safety precautions recommended for installation of electrical equipment should be strictly adhered to.

Calibration of Meter

All meters are calibrated at the factory with the help of reference source which have trace ability to National Physical Laboratories (NPL), New Delhi. The standards and equipment available at SML come from reputed manufacturers who themselves maintain tractability to International standardisation agencies. The certified accuracy of our meters dispatched from factory are sustained without any drift from the accuracy class over a long period and do not require rectification

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Definitions Active energy: Real energy consumed by load, which is converted in to usable form. Reactive energy: Fictitious energy, which is not really consumed but is a part of the energy that keeps flowing back and forth between storage elements. Apparent energy: For a given voltage and current amplitudes, maximum power is drawn at Cos = 1, known as apparent power and correspondingly apparent energy. Import: To take energy from the system. Export: To supply energy to the system Forwarded energy: Energy will increment in forward direction irrespective of any CT reversal. It is the absolute sum of all the three-phase energy.

Net Energy: It is the algebraic sum of all the three individual phase energy. E.g. if R-phase Y-phase B-phase Net Energy Forwarded Energy energy energy energy 1 1 1 3 3 -1 1 1 1 3 -1 -1 1 -1 3 -1 -1 -1 -3 3 Integration period: Instantaneous demand is averaged over certain time period to get a better idea of the true load conditions. This time period is known as integration period. Maximum demand: Maximum of average demands drawn during a given period. Billing period: The time frame between two successive maximum demand resets. Time Of Day metering: to divide a certain period of time into time slots with tariff rates arranged in such a way so as to encourage the consumer of higher demand to reduce consumption during high demand hours and shift it to lower demand ones. Optical head: Interface between a standard RS 232C PC port and meters optical interface. MRI (Meter Reading Instrument): A device used for communication with the meter.

Company Note

While every effort has been made in the development of CEM and its associated documentation, there is every chance that errors may have crept in. Secure Meters undertakes to repair and correct any errors and requests the users to provide Feed back.

Annexure: Display Parameter Details

Entity 21

Annexure: Display Parameters Details

Push Button Mode Displays

1. LAMP TEST In this display, all the segments of the LCD are lighted up to confirm the proper working of the display LCD. The user must ensure that all the segments are lighted up in this display before watching any other display.

2. DATE This display shows the Current Date in the meter (based on the real time maintained by meter clock called RTC) in DD:MM:YY format. The example below shows how 01st Jan 2002 will be displayed.

3. REAL TIME This display shows the Current Time in the meter (based on the real time maintained by meter clock called RTC) in HH:MM:SS format. The example below shows how 12:08:06 hrs will be displayed.

4. PHASE TO NEUTRAL VOLTAGES This display shows the instantaneous value of phase to neutral voltage for individual phases. (Denoted by 'P-N x' where x takes the value 1/2/3 for R-phase, Y-phase and B-phase respectively).The example below shows Phase 1-to- Neutral voltage.

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5. PHASE TO PHASE VOLTAGE This display shows the instantaneous value of phase to phase voltages. (Denoted by 'P-P x' where x takes the value 12/23/31 for R-Y, Y-B and B-R phase to phase combinations respectively).The example below shows the R phase-to-Y phase voltage.

6. INSTANTANEOUS LINE CURRENTS This display shows the instantaneous value of line current in individual phase. (Denoted by 'LINE x' where x takes the value 1/2/3 for R-phase, Y-phase and B-phase respectively.)The example below shows the instantaneous line current of Phase 1 i.e. R-Phase.

7. VOLTAGE TO VOLTAGE ANGLES (R-R) This display shows the angle (in degrees) between the R-phase voltage and the R-phase voltage (identified by 'V-V 11' in the identifier).

8. SUPPLY FREQUENCY This display shows the instantaneous supply frequency in resolution of 1/1000 Hz.

9. INSTANTANEOUS AVERAGE POWER FACTOR The display shows the instantaneous value of average power factor with the direction of active energy.

Annexure: Display Parameter Details

Entity 23

10. INSTANTANEOUS PER PHASE POWER FACTOR This display shows the Instantaneous power factor for individual phases (Denoted by PF x where x takes values 1/2/3 for R Phase, Y Phase and B Phase respectively). The direction of active energy is also shown. The example below shows the instantaneous power factor of Phase 1 i.e. R-Phase.

11. INSTANTANEOUS ACTIVE LOAD This display shows the instantaneous active power being measured by the meter.

12. INSTANTANEOUS REACTIVE LOAD This display shows the instantaneous reactive power being measured by the meter.

13. INSTANTANEOUS APPARENT LOAD This display shows the instantaneous apparent power being measured by the meter.

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14. PHASE SEQUENCE This display shows the phase sequence of the voltages being fed to the meter. There are three cases: Forward phase sequence i.e. RYB is identified by 'FOR' in the identifier. Reverse phase sequence i.e. RBY is identified by 'REV' in the identifier. Invalid phase sequence i.e. when angles between different voltage are not valid, is identified by 'INV' in the identifier.

15. CONNECTION CHECK This display shows if any of the following abnormal electrical conditions has occurred. The priority is as per the sequence given below: 1. Voltage Miss: Identifier is PT Lo and the phase(s) whose voltage is missing is shown

in the data. 2. Invalid Voltage: Identifier is INV and the phase(s) whose angles are invalid are shown

in the data. 3. CT Miss: Identifier is CT Lo and the phase(s) whose current is missing is shown in the

data. 4. CT Reversal: Identifier is CTREV and the phase(s) whose current terminals are reversed

is/are shown in the data. 5. When none of the above conditions are existing, Circuit OK is displayed.

16. PRIMARY VOLTAGE This display shows the value of Primary Voltage for which the meter has been commissioned. The example below shows that the meter has been commissioned for primary voltage of 230 Volts.

17. PRIMARY CURRENT This display shows the value of Primary Current (in amperes) for which the meter has been commissioned. The example below shows that the meter has been commissioned for primary current of 5 Amperes.

Annexure: Display Parameter Details

Entity 25

18. APPARENT RISING DEMAND This display shows the Rising demand along with elapsed time in the current Demand Integration Period (Time shown in mins. since start of the Integration Period in the identifier) for apparent energy parameter.

19. CUMULATIVE POWER ON HOURS This display shows the duration (in hours) between the present time and the time of meter manufacturing for which the meter remained powered on.

20. CUMULATIVE POWER OFF HOURS This display shows the duration (in hours) between the current time and the time of meter manufacturing for which the meter remained powered off

21. CURRENT ACTIVE IMPORT ENERGY This display shows the current value of Active Import Energy register.

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22. CURRENT ACTIVE EXPORT ENERGY This display shows the current value of Active Export Energy register.

23. CURRENT REACTIVE LAG ENERGY This display shows the current value of Reactive Lag Energy register.

24. CURRENT REACTIVE LEAD ENERGY This display shows the current value of Reactive Lead Energy register.

25. CURRENT APPARENT ENERGY This display shows the current value of Apparent Energy register.

26. HISTORICAL ACTIVE IMPORT ENERGY This display shows the value of Active Import Energy register at individual billing instants. The billing instants are identified by the digit after H i.e. H1 for history no. 1, H2 for history no. 2 and so on.

Annexure: Display Parameter Details

Entity 27

27. HISTORICAL ACTIVE EXPORT ENERGY This display shows the value of Active Export Energy register at individual billing instants. The billing instants are identified by the digit after H i.e. H1for history no. 1, H2 for history no. 2 and so on.

28. HISTORICAL REACTIVE LAG ENERGY This display shows the value of Reactive Lag Energy register at individual billing instants. The billing instants are identified by the digit after H i.e. H1 for history no. 1, H2 for history no. 2 and so on.

29. HISTORICAL REACTIVE LEAD ENERGY This display shows the value of Reactive Lead Energy register at individual billing instants. The billing instants are identified by the digit after H i.e. H1 for history no. 1, H2 for history no. 2 and so on.

30. HISTORICAL APPARENT ENERGY This display shows the value of Apparent Energy register at individual billing instants. The billing instants are identified by the digit after H i.e. H1 for history no. 1, H2 for history no. 2 and so on.

Premier Modbus

28 BGX 501-147 R02

31. CURRENT APPARENT UNIVERSAL MAXIMUM DEMAND This display shows the value of current Universal (0-24 hrs.) Maximum Demand for Apparent parameter.

32. CURRENT TOD APPARENT MAXIMUM DEMAND This display shows the value of current Maximum Demand(MD) in individual TOD MD registers for Apparent parameter.

33. CURRENT TOD ACTIVE IMPORT ENERGY This display shows the current value of individual TOD Active Import Energy register. The TOD no. is identified by the digit before C in the identifier i.e. 1C for 1st TOD, 2C for 2nd TOD and so on.

34. CURRENT TOD APPARENT ENERGY This display shows the current value of individual TOD Apparent Energy register. The TOD no. is identified by the digit before C in the identifier i.e. 1C for 1st TOD, 2C for 2nd TOD and so on.

Annexure: Display Parameter Details

Entity 29

35. CUMULATIVE APPARENT MAXIMUM DEMAND This display shows Cumulative Maximum Demand (identifier Un CMD) for Apparent energy parameter.

36. POTENTIAL CIRCUIT RELATED PRESENT TAMPER STATUS This display shows the potential circuit related tamper(s) existing at the present instant. The character allocation is as follows (from left to right): 'lU b y r' denoting invalid voltage, voltage unbalance, B-phase PT miss, Y phase PT miss and R-phase PT miss respectively. A blank at particular position shows that the corresponding tamper is not supported while a '-' means particular tamper is not existing at present.

37. CURRENT CIRCUIT RELATED PRESENT TAMPER STATUS This display shows the current circuit related tamper(s) existing at the present instant. The character allocation is as follows: (from left to right) 'o l b O b y r ' representing over current, current imbalance, current bypass, current circuit open, B-Phase CT reversal, Y-phase CT reversal and R-phase CT reversal tampers respectively. A blank at corresponding position shows that the particular tamper is not supported while a '-' means particular tamper is not existing at present.

38. PRESENT STATUS OF OTHER TAMPERS This display shows the present status of tampers included in Other Tamper class. The character allocation is as follows :( from left to right) 'b y r M n' denoting B-phase current circuit missing, Y-phase current circuit missing, R-phase current circuit missing, Magnetic Interference tamper. Neutral Disturbance tamper respectively. A blank at particular position shows that the corresponding tamper is not supported while a '-' means particular tamper is not existing at present.

Premier Modbus

30 BGX 501-147 R02

39. FIRST TAMPER OCCURRENCE IDENTIFICATION This display shows the identity of the first ever tamper occurrence event recorded by the meter. The nature of the tamper is denoted by PT or CT or OT representing potential circuit related, current circuit related or other type in that order. The identity of tamper for each of the above nature is same as that mentioned in present tamper status displays. In the example below, it is shown that the first tamper recorded by the meter was missing R phase in current circuit (included in OT group).

40. FIRST TAMPER OCCURRENCE DATE This display shows the date of occurrence of the very first tamper event recorded by the meter.

41. FIRST TAMPER OCCURRENCE TIME This display shows the time of occurrence of very first tamper event recorded in the meter.

42. LAST TAMPER RESTORATION IDENTIFICATION This display shows the identity of the latest tamper restoration event recorded by the meter. The nature of the tamper is denoted by PT or CT or OT representing potential circuit related, current circuit related or other type in that order. The identity of tamper for each of the above nature is same as that mentioned in present tamper status displays. In the example below, it is shown that the last tamper recorded by the meter was Y-phase reversal in current circuit (included in CT Type)

Annexure: Display Parameter Details

Entity 31

43. LAST TAMPER RESTORATION DATE This display shows the date of the latest tamper restoration event recorded by the meter.

44. LAST TAMPER RESTORATION TIME This display shows the time of the latest tamper restoration event recorded by the meter.

45. CUMULATIVE TAMPER OCCURRENCE COUNT This display shows the total number of tamper occurrence events (of all kinds) recorded by the meter till any instant. The following display shows that 25 tamper events have been recorded so far. 'CNTtr' denotes tamper counts.

46. R PHASE MISSING POTENTIAL TAMPER COUNTS This display shows the count of R- Phase Potential circuit missing tamper occurrences which have been recorded by the meter.

47. CURRENT ACTIVE IMPORT ENERGY CONSUMPTION This display shows the consumption of Active Import Energy since the last billing operation.

Premier Modbus

32 BGX 501-147 R02

48. CURRENT ACTIVE EXPORT ENERGY CONSUMPTION This display shows the consumption of Active Export Energy since the last billing operation.

49. CURRENT REACTIVE LAG ENERGY CONSUMPTION This display shows the consumption of Reactive Lag Energy since the last billing operation.

50. CURRENT REACTIVE LEAD ENERGY CONSUMPTION This display shows the consumption of Reactive Lead Energy since the last billing operation.

51. CURRENT APPARENT ENERGY CONSUMPTION This display shows the consumption of Apparent Energy since the last billing operation.

Secure Meters Limited P.B. No. 30, E Class Industrial Area Pratap Nagar, UDAIPUR - 313003, INDIA

Phone: ++91-294-2492300 to 2492304 Fax: ++91-294-2492310

Email: mktg@securemeters.com

Premier Modbus Manual: Copyright @ Secure Meters Ltd. 2004-2006 This manual is a copyright with all rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise without the prior written permission of the copyright owner; the same proprietary and copyright must be affixed to any permitted copies as were affixed to the original. The results generated by Premier Modbus manual are not subject to copyright, and there is no restriction placed on their use by the original purchaser. No warranties are expressed or implied with respect to the Premier Modbus manual described, its quality, performance, or suitability for any purpose. In no circumstance will the copyright holder or his agents be liable for direct, indirect, incidental or consequential damages resulting from the use of Premier Modbus manual. No statements contained in this package shall affect the statutory rights of consumers.