ZTE ZBTE Series - GE...
Transcript of ZTE ZBTE Series - GE...
GE EnergyDigital Energy
Zenith
ZTE/ZBTE SeriesTransfer Switches40-4000 Amps
Operation & Maintenance Manual
Authorized Service
For GE parts and service call: 1 + 800 637-1738, option #3 or 1 + 773 299-6600
Table of Contents
Introduction, Safety & Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Installation
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Inspection Prior to Initial Energization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Initial Testing & Energization of the SwitchManual Testing of Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Electrical Testing of the Switch (Source 1 = utility, Source 2 = generator) . . . . . . . . . . . . . . . . . . . 5
The Control Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5The MX350 Controller
The MX350 Graphical Display & Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Switch Exerciser. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Controller Power Supply (UTA – Universal Transformer Assembly) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Sequence of Operation for Bypass/Isolation Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Troubleshooting & Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Maintenance & Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Information subject to change without notice. Please verify all details with GE.
Zenith ZTE/ZBTE Series Operation & Maintenance Manual Page 1 91R-1000
Introduction, Safety & Storage
GE transfer switches are used to provide a continuoussource of power for mission, process and healthcarecritical loads by automatically transferring from a pre-ferred source of power Source 1 (or Normal Source) to anon-preferred alternate Source 2 (or Emergency) powersource (typically a generator) in the event that Source 1operational parameters fall outside preset limits.
Voltage and current sensing and system controls areperformed via a state-of-the-art microcontroller locatedon the cabinet door. It is designed to give highly accuratecontrol of the transfer switch system.
All GE transfer switches are designed for use on emergencyor standby systems and are rated for total system or motorloads. Transfer switches are UL listed under Standard1008 and CSA certified under Standard C22.2 No. 178.
The safe operation of your switch at all times is GE’s focus. It must be recognized that hazardous voltages andcurrents can exist during normal operation and anymaintenance on the transfer switch must be performedutilizing appropriate safety measures. Installation,
adjustment, maintenance or removal of the switch mustonly be carried out by qualified personnel with all powerto the switch turned off. It is recommended that onlyqualified electricians be allowed to install or providemaintenance on the switch.
Regarding the switch itself, proper storage, installation,operation and maintenance will help increase its operationallife. Upon initial receipt of the transfer switch, inspect forany damage. This includes damage to the enclosure, powerpanel, control panel and wiring harnesses. If any damageis found or suspected, file a claim as soon as possiblewith the carrier and notify the nearest GE representative,or call 1 + 800 637-1738 or 1 + 773 299-6600.
Prior to installation store the transfer switch in a clean drylocation, protected from dirt and water. Provide ample aircirculation and heat, if necessary, to prevent condensation.See Table 1 for recommended storage and ambientoperating temperatures.
CAUTIONDue to hazardous voltages and currents, GE recommends
that a GE Certified technician or a qualified electrician perform the installation and maintenance of the switch.
!
DANGERHAZARDOUS VOLTAGE CAN CAUSE
SEVERE INJURY OR DEATHTurn OFF all power before installation, adjustment or removal of transfer switch or any of its components.
!
NOTEA protective device such as a molded case circuit breaker orfused disconnect switch MUST be installed on both sources of
incoming power for circuit protection and as a disconnect device.
All references made within this manual about the terms“Source 1”, “S1” or “Preferred Source” relate to a “Normal”
power source (typically from a utility source). References made to“Source 2”, “S2”, “Non-preferred Source” or “Alternate Source”relate to an Emergency Source (many times a generator).
Table 1Storage and Operating Ambient Temperatures
5% to 95%(non-condensing)
-30°C to +75°C (-22°F to +167°F)
40-400 AMP(molded shell)-20°C to +65°C(-4°F to +149°F)
40-4000 AMP(all other frameand panel types)-20°C to +60°C(-4°F to +140°F)
StorageTemperature Humidity
OperatingTemperature(Ambient)
Figure 1Method of Moving Transfer Switch
NOTE: When lifting the switch using a spreader bar, height Hmust be equal to half of distance D.
91R-1000 Page 2 Zenith ZTE/ZBTE Series Operation & Maintenance Manual
Installation
When preparing to install the transfer switch, review thedocumentation included with the unit. Each GE transferswitch is factory wired and tested. A complete documen-tation package is furnished with each switch, providingdescriptions and schematics for the following:
a. Standard and non-standard control interface signals and options.
b. Sequence of operations.c. Standard indicators, pushbuttons and annunciators.d. Controller failure and return settings and time delays.e. Description of the programmable engine exerciser.f. Standard programmable control of switch operation.g. User-configurable input and output.h. System schematics:
1. Overall switch system.2. Universal transformer assembly (UTA) power supply.3. Transfer switch device layout.4. Transfer switch power panel layout.5. Interconnect plugs.6. Customer connection wiring.
MountingAdequate lifting means must be used to mount thetransfer switch into place. The recommended methodfor moving the ATS using lifting eyes, where supplied, anda spreader bar is illustrated in Figure 1. Enough roomshould be allowed to open the cabinet door(s) fully forinspection and servicing of the switch per NEC andlocal codes.
Inspection Prior to Initial EnergizationPrior to energizing the transfer switch, perform the following:
1. With a vacuum, remove any debris collected onthe switch during shipment or installation.
2. Check engine start connections. The engine-startterminals are located on terminal block positions 1 through 3 (see Figures 2 and 3). The E contactprovides the engine start signal from the automatictransfer switch controller to the genset. The terminalblock has two sets of A3 (Source 2 position) normallyopen contacts (NO) and two sets of A4 (Source 1position) NO contacts.
3. Verify the correct connection of all control wires.
4. Check settings of all timers and adjust as necessary.5. Adjust any optional accessories as required.6. Verify that all Source 1, Source 2 and Load cables
are correctly connected to the clearly marked terminals on the unit.
7. Verify from Table 2 the number and sizes of cablelugs, which are supplied as standard per the switchamperage rating. Most transfer switches are sup-plied with UL listed solderless screw-type terminalsas standard for the Source 1, Source 2 and Loadpower connections.
8. Verify equipment ground cable(s) are installed per NEC and/or local codes.
9. Verify that all cable lug connections are tightenedin accordance with torque values in Table 3.
10. Remove surface oxides from cables by cleaningwith a wire brush.
11. Make sure that all covers and barriers are installedand properly fastened.
NOTEPower panels ship from GE connected to Source 1.
NOTEAll control wires (18-12 AWG) must be
torqued to 19 in/lbs (1.6 lb-ft) (2.2 N-m)
CAUTIONBefore drilling conduit entry holes or any accessory mounting
holes, cover and protect the switch and control panel toprevent dirt and metal fragments from entering the
mechanical and electrical components of the switch.
Failure to do so may result in damage and malfunction of the switch and void the warranty.
!
Table 2Power Connections: Screw Type Terminals for External Power Connections
Switch Size (Amps)Source 1, Source 2 & Load Terminals Neutral Bar (When Required)
Cable Per Pole Range of Wire Sizes No. of Cables per lug Range of Wire Sizes40 1 #8 AWG to 1/0 3 #8 AWG to 1/0
80 1 #8 AWG to 1/0 3 #8 AWG to 1/0
100 1 #8 AWG to 1/0 3 #8 AWG to 1/0
150 1 #8 AWG to 3/0 3 #8 AWG to 300 MCM
225 1 #6 AWG to 250 MCM 3 #6 AWG to 300 MCM
260, 400 1 #4 AWG to 600 MCM 3 #4 AWG to 300 MCM
600 2 #2 AWG to 600 MCM 8 #2 AWG to 600 MCM
800, 1000, 1200 4 #2 AWG to 600 MCM 12 #2 AWG to 600 MCM
1600, 2000, 3000, 4000 Line, Load and Neutral terminals are located in the rear of switch and arranged with bare bus bar
Zenith ZTE/ZBTE Series Operation & Maintenance Manual Page 3 91R-1000
Table 3Tightening Torque for Lugs
Figure 2Typical Switch Component Arrangement Inside Enclosure1200-1600A Bypass Shown Below
Terminal Block (TB)(Engine start contact terminals,source 1 and 2 position contacts)
Input Relay (typ.)
Universal Transformer Assembly (UTA) Power Supply
ATSPowerPanel
Backside of MX350 Graphical Control Panel
MX350 Modular Controller (CPU, powersupply, sensing CT card, I/O cards, etc.)
DisconnectSwitch (DS)
Load
CurrentTransformer (CT)
BlockSource 2
Source 1
Socket Size Across Flats Torque
in mm lb-in lb-ft N-m1/8 3 45 4 5
5/32 4 100 8 11
3/16 5 120 10 14
7/32 5.5 150 12 17
1/4 6 200 17 23
5/16 8 275 23 31
3/8 10 375 31 42
1/2 13 500 42 56
9/16 14 600 50 68
Bypass IsolationATS Power Panel
Output Relay (typ.)
91R-1000 Page 4 Zenith ZTE/ZBTE Series Operation & Maintenance Manual
Figure 3Representative Schematic of Terminal Board, Output Strip and Input StripRefer to Electrical Schematic Drawing for additional details
CUSTOMER USEA1 OUT5 11
MX3
50 C
ON
TRO
LLER
TO L
-CA
RD S
LOT
“G” O
N
G OUTPUT STRIP
OUTPUT-512A2 14
5-3
5-2
L5L6
L4L3L2L1
G2
G6
G4
G5
G3
J8G1
800802
J7
2
1
-
+
OUTPUT-4
FACTORY USED (FOR ALARM)
FOR CUSTOMER USESTATUS OUTPUT CONTACTSHUNT TRIP EMERG. BKR.
LOAD SHEDSTATUS OUTPUT CONTACTFOR CUSTOMER USE
GE ZENITH
12
12
OUT4A1
A2
OUT3A1
A2
14
11
11
14
CONTROLS
12
12
A1 OUT1
OUT2A2
A1
A2
11
14
11
14
802
4-2
4-3
5-1
4-1
3-3
3-2
2-3
3-1
1-3
2-2
1-2
2-1
1-1
(-)
OUTPUTCONTACTS FOR
CONFIGURABLE
OTHERS
G INPUT STRIP
L9
MX3
50 C
ON
TRO
LLER
TO L
-CA
RD S
LOT
“G” O
N
L13L14
L12L11L10
G9
G13G14
G12
G10G11
L7L8
802800
J6
G8G7
1
2
J5
-
+ (SUPPLIED BY OTHERS)
(SUPPLIED BY OTHERS)
(SEE NOTE 3)
(SEE NOTE 4)
(SEE NOTE 8)
CCNO
12
12
12
IN7A2
A1
IN5
IN6A2
A1
A2
A1
14
11
14
11
14
11
COM
13
12
25ZA
NO
NO
CC
CC
IN1 11A1
12
12
12
12
IN3A1
IN4A1
A2
A2
IN2A1
A2
A2
11
11
14
14
11
14
14
GE ZENITHCONTROLS
11
10
9
7
8R15
NO
NO
CC
CC
Q2
DS
NO C
FOR
CU
STO
MER
USE
CO
NFI
GU
RAB
LE IN
PUTS
OPT
ION
PAC
KAG
E
OTHERS
COM
COM
CONNECTIONS OF THE TRANSFER SWITCH.COMPONENTS DRAWN IN DASHED LINES ARE OPTION PACKAGE AND CUSTOMER
Q2 (TEST WITH LOAD) IS PROVIDED AS STANDARD (PRE-CONFIGURED) FEATURE.R15 (LOAD SHED) IS PROVIDED AS AN OPTION (PRE-CONFIGURED) FEATURE.
ATS SHOWN IN SOURCE-1 POSITION WITH NO POWER AVAILABLE.
UNLESS OTHERWISE SPECIFIED ALL CUSTOMER CONNECTION WIRES TO BE #14 AWG.,
OUTPUT STRIP CONTACTS ARE RATED 10 AMPS AT 30VDC/250VAC.ENGINE START CONTACT IS RATED 10 AMPS AT 28VDC/120VAC.600V.
6.7.
5.4.3.
2.1.
NOTES
8. ENGINE START CONTACT MAY BE ON SEPARATE TERMINAL BLOCK FOR BYPASS SWITCHES. REFER TO ELECTRICAL SCHEMATIC FOR TERMINAL LOCATION.
GE OTHERS
A4-1
A3-1
A3-2
CARD8
K8
C
C
C
7
9
E12
E11
E13
NO
NO
NO
A3-2
CA3-1
A3-1
CA4-1
A4-1
CA3-2
A4-2C
AUX
NO
CA4-2
A4-2
CLOSED IN SOURCE 2 POSITION.(2) NORMALLY OPEN CONTACTS.
FOR CUSTOMER USE.
FOR CUSTOMER USECONTACT
EENGINE START CONTACT
(2) NORMALLY OPEN CONTACTS
TB
FOR CUSTOMER USE.HELD CLOSED IN SOURCE 1 POSITION
CARDK
TB
ENG. START
98
8 7
8 9
PA3 TP1E11
E13
E12
NO
NO
NO
NO
NO
NO
C
AB4-5
AB3-6C
C
A3-1C
A4-1
A3-2
C
A4-2C
CA3-1
101
100
A3-1
CA3-2
99
CA4-1
CA4-2
A3-2
A4-1
A4-2AUX
GE OTHERS
(2) NORMALLY OPENCONTACTS, HELD CLOSED INSOURCE 1 POSITION FORCUSTOMER USE. SEE NOTE 1
(2) NORMALLY OPENCONTACTS, CLOSED INSOURCE 2 POSITIONFOR CUSTOMER USE.
IS IN SOURCE 1 POSITION.CONTACT CLOSED WHEN BYPASS
FOR CUSTOMER USE.CONTACT CLOSED WHEN BYPASSIS IN SOURCE 2 POSITION.FOR CUSTOMER USE.
CONTACTE
FOR CUSTOMER USEENGINE START CONTACT
Non-Bypass ATS Bypass ATS
Zenith ZTE/ZBTE Series Operation & Maintenance Manual Page 5 91R-1000
Initial Testing and Energization of the Switch
Manual Testing of MechanismA manual operator handle is provided with the transferswitch for maintenance purposes only. Manual operationof the switch must be checked before it is operatedelectrically. All power sources must be disconnectedbefore manual operation of the switch is attempted.Insert the handle and operate the transfer switch betweenthe Source 1 and Source 2 positions. The transfer switchshould operate smoothly without binding. After insuringthe switch mechanically transfers adequately, returnthe switch to Source 1 position, remove the handle and return it to the holder provided.
Before proceeding, refer to the information packagesupplied with the ATS. Read and understand the information on all accessories installed.
Figure 4Transfer Switch Equipment Rating Nameplate (Typical)
AUTOMATIC TRANSFER SWITCH FORUSE IN EMERGENCY SYSTEMS
Model Number: Z3003S1AA50XXXXXXXSerial Number: 1598248-2BOM Number: ZB1SD20031-05A600X
RATINGVolts: 480 Hz: 60Amps: 2000 Phase: 03
LISTED382HE23911
CAUTIONDue to hazardous voltages and currents, GE recommends
that a GE Certified technician or a qualified electrician perform the installation and maintenance of the switch.
!
WARNINGAll power sources must be disconnected before manual operation of the switch.
!
Electrical Testing of the Switch (Source 1 = utility, Source 2 = generator)To verify the electrical system and proper automaticoperation of the switch, perform the following steps:
CHECKING SOURCE 1 (PREFERRED SOURCE)1. Check to make sure the switch is connected to
Source 1 position.2. Turn the Disconnect Switch (DS) to INHIBIT. This
prevents the switch from transferring or sending astart signal to the Source 2 generator unintentionally.
3. Verify that the switch rating is the same as the system voltage from Source 1 supply power. The equipment rating nameplate on the transferswitch lists the voltage (see Figure 4).
4. Close the Source 1 input circuit breaker.5. Confirm that the MX350 controller is sensing
Source 1 voltage. The S1 LED should be illuminated.Electrical parameters (including phase rotation)can be viewed on the MX350 Graphical ControlPanel on the \Value\Summary and \Diag\Phasorscreens. Verify that the system voltage is correct forthe rating of the switch.
CHECKING SOURCE 2 (NON-PREFERRED OR ALTERNATE SOURCE)6. Close the Source 2 input circuit breaker.7. Manually start Source 2 via controls on the generator
itself. Note that with the DS in INHIBIT position, thegenerator cannot be started by the MX350 controller.
8. Confirm that the MX350 controller is sensingSource 2 voltage. The S2 LED should be illuminated.Electrical parameters (including phase rotation)can be viewed on the Graphical Control Panel onthe \Value\Summary and \Diag\Phasor screens.
9. Verify that the phase rotation of Source 1 is thesame as the phase rotation of Source 2.
10. Manually shut down the generator via controls onthe generator itself.
CAUTIONEnergizing a transfer switch with dissimilar
system voltage from that which the ATS is rated may cause equipment damage.
!
91R-1000 Page 6 Zenith ZTE/ZBTE Series Operation & Maintenance Manual
CHECKING THE SWITCH’S ABILITY TO TRANSFER11. Turn the DS to AUTO position. This allows the MX350
controller to send a start signal to the generator.12. Perform a System Test. The options available are
(a) Fast Test (test with load without time delays),(b) Xfer Load and (c) No Xfer (test without load, gen-erator start only). The test(s) can be initiated by thegreen TEST button on the Graphical Control Panel.
13. After completing electrical tests, close and lock theenclosure, including all small quarter-turn locks onthe enclosure door.
Electrical testing of the switch is further discussed inthe manual MX350 Automatic Transfer Control System(Publication Number 1601-9071-A1).
The Control Connections
The ZTE and ZBTE lines of transfer switches are designed formaximum flexibility and ease of installation. As illustrated inFigure 2, the MX350 controller input/output and meteringmodules, graphical control panel and power suppliesare mounted on the enclosure door. All terminal connec-tions for the engine start, switch position contacts, inputand output relays are typically just inside the cabinet onthe right side for ease of accessibility. Configurableinput and output relays are PCB board mounted on DINrail in combinational arrays of 5 inputs and 7 outputs. A“Field Connection Diagram” (see the example in Figure5) is affixed on the cover of the universal transformerassembly (UTA) power supply for easy reference. Thisdiagram provides the factory-supplied terminal boardconnections as well as dry contact inputs and outputsidentified by terminal number as defined in the MX350controller. The terminal board and I/O connections areschematically shown in Figure 3. Close-up photographsof an input and output PCB with terminal connectionsare shown in Figures 6 and 7.
The number of PCB-mounted input and output relayassemblies equals the number of “L cards” on themicrocontroller, more formally termed “IO_L modules.”The assembly of output relays is GE part number 50P-3042.The input relay assembly is GE part number 50P-3041. Ifthe microcontroller has one L card, then there will beone pair of GE Part Number 50P-3041 and 50P-3042 PCBcombinations mounted on the DIN rail inside the enclosure.For two L cards, there will be two sets of input and outputstrips. The maximum combination is three pairs of I/Ostrips (that is, a total of six relay DIN rail mounted PCBs).
The controller automatically recognizes the physicallocation of the input or output relays via an alpha-numericidentification system. The first set of output relays arenamed G1 through G5 while the input relays are identifiedas G7 through G13. If a second L card exists in the micro-controller, the second PCB-mounted assembly output relaysare named H1 through H5; the outputs are H7 throughH13. Similarly, a third IO_L module is related to inputsI1 through I5 and outputs I7 through I13 (see Table 4).
CAUTIONCertain accessories, per specific schematics, can inhibit
automatic transfer. Engine Genset could start when enginecontrol wires are attached.
!
NOTEA periodic test of the transfer switch under load conditions
is recommended to insure proper operation. (See National Electric Code articles 700 and 701)
Terminal Terminal Terminal TypeG1 H1 I1 OutputG2 H2 I2 OutputG3 H3 I3 OutputG4 H4 I4 OutputG5 H5 I5 OutputG6 H6 I6 Common for outputsG7 H7 I7 InputG8 H8 I8 InputG9 H9 I9 InputG10 H10 I10 InputG11 H11 I11 InputG12 H12 I12 InputG13 H13 I13 InputG14 H14 I14 Common for inputs
Table 4IO_L Module Connections
Terminals G7 and G8 are always used for DS and Q2 functions, respectively, and cannotbe adjusted. Depending on the type of switch and features ordered, Terminals G1 throughG5 as well as G9 through G13 may not be available for customer configuration. Seeelectrical schematic.
Zenith ZTE/ZBTE Series Operation & Maintenance Manual Page 7 91R-1000
Figure 5Example of Field Connection Diagram
Notes: 1. See Field connection wiring diagram for additional wiring details.2. Controller inputs and outputs are field reconfigurable. “Factory Settings: indicate configuration at time of shipment.3. From MX350 Display, go to \HOME\INPUTS or \HOME\OUTPUTS to see current configuration.4. Record user configuration in “Field Setting” area below.
Name Term # Description
TB Strip 15 Connected to Source 1 (NO)
14 Connected to Source 1 (Common)
13 Connected to Source 1 (NO)
12 Connected to Source 1 (Common)
11 Connected to Source 2 (NO)
10 Connected to Source 2 (Common)
9 Connected to Source 2 (NO)
8 Connected to Source 2 (Common)
7
6
5
4
3 Engine Start – NC
2 Engine Start – Common
1 Engine Start – NO
G InputStrip
G 7 Disconnect Switch (DS) Factory UseOnly
G 8 Test with Load (Q2) Factory UseOnly
G 9 Load Shed from S2 (R15) Factory UseOnly
G 10 Bypass Xfer Time Delay to S1
G 11 Inhibit Xfer to S2 (Q3)
G 12 Inhibit Xfer to S1 (Q7)
G 13 Engine Start (SW1)
Com +24VDC Factory UseOnly
Name Term # Factory Setting Field Setting
G OutputStrip
G 1 (NO/NC/Common) Load Shed from S2 (R15) Factory Use
Only
G 2 (NO/NC/Common) Alternative Source Fail to Start
G 3 (NO/NC/Common) S1 Failure
G 4 (NO/NC/Common) S2 Failure to Connect
G 5 (NO/NC/Common) Load Control 1
Name Term # Description
TB Strip 12 Connected to Source 1 (NO)
11 Connected to Source 1 (Common)
10 Connected to Source 1 (NO)
9 Connected to Source 1 (Common)
8 Connected to Source 2 (NO)
7 Connected to Source 2 (Common)
6 Connected to Source 2 (NO)
5 Connected to Source 2 (Common)
4 Bypass in Source 1 (NO)
3 Bypass in Source 1 (Common)
2 Bypass in Source 2 (NO)
1 Bypass in Source 2 (Common)
3 Engine Start – NC
2 Engine Start – Common
1 Engine Start – NO
Non-Bypass ATS Bypass ATS
Input 7Position 1
Input 8Position 2
Input 9Position 3
Input 10Position 4
Input 11Position 5
Input 12Position 6
Input 13Position 7
CommonPosition 8
CommonPosition 9
CommonPosition 10
91R-1000 Page 8 Zenith ZTE/ZBTE Series Operation & Maintenance Manual
Output 11 = NO2 = NC3 = common
Output 24 = NO5 = NC6 = common
Output 37 = NO8 = NC9 = common
Output 410 = NO11 = NC12 = common
Output 513 = NO14 = NC15 = common
Figure 7Input Strip and Connections (GE Part Number 50P-3041)
Figure 6Output Strip and Connections (GE Part Number 50P-3042)
Zenith ZTE/ZBTE Series Operation & Maintenance Manual Page 9 91R-1000
Figure 8MX350 Graphical Display Components
The MX350 Controller
The MX350 microcontroller is a modular control andmonitoring system designed specifically for low-voltagetransfer switch applications. The MX350 provides thefollowing key benefits:
• Flexible control and communication options to suitany low-voltage transfer switch application.
• Small footprint.• Modular design, which reduces the number of spare
components for maintenance and testing.• Integrated pushbuttons and LED indicators which
reduce required external components and wiring• Multiple communication protocols which permit simple
integration into monitoring and control systems.• A graphical control panel that provides local control
and access to system information.
Detailed technical information on the MX350 controlleris described in the manual MX350 Automatic TransferControl System (Publication Number 1601-9071-A1).
The MX350 Graphical Display and KeypadThe MX350 controller features a ¼ VGA color graphicaldisplay with status LEDs, an USB programming port andmenu-driven soft keys (see Figure 8) as well as dedicatedcontrol and navigational keys. Each display page, inturn, consists of three components: (1) a header bar, (2) the selected page and (3) soft-key labels (Figure 8).
The header bar displays the hierarchical path name, thedate and time and the current password access level.The soft-key labels are indicated on the bottom line.Soft-keys are used for navigation, performing functionsand for acknowledgement transactions. Soft-keys labels
change to show relevant selections for the displayedscreen. The color of each soft-key label indicates itsfunctionality. Soft-keys are highlighted for the displayedpage, unauthorized keys are “greyed-out”, and unusedkeys are not displayed.
The control panel LEDs summarize the status of thetransfer switch, including the following indications:• ALARM: indicates that there is a problem with the ATS
or that a user configurable alarm condition is active.• TD DELAY: indicates that the controller is timing before
taking the next control action.• XFER INHIBIT: indicates that the controller will not
automatically transfer to the other source and thatoperator intervention is required to allow transfer.
• S1 (Source 1) Available LED: indicates that S1 power is present and within user defined limits.
• S2 (Source 2) Available LED: indicates that S2 power is present and within user defined limits.
• S1 (Source 1) Status LED: indicates that the load isconnected to S1 power.
• S2 (Source 2) Status LED: indicates that the load isconnected to S2 power.
The MX350 controller page hierarchy is shown in Figure 9.
Operation Setpoints and User-Configurable Inputs and OutputsOperation setpoints define the acceptable electrical andtime limits for both Source 1 and Source 2. These set-points define dropout and restore values for over andundervoltage, over and under frequency, as well as theassociated time delays. Tables 7 and 8 provide typicalparameter settings for operation setpoints and timers.
91R-1000 Page 10 Zenith ZTE/ZBTE Series Operation & Maintenance Manual
Figure 9MX350 Graphical Display Page Hierarchy
Amps
Power
Volts
PQ
Values
Inputs
Outputs
System
Message
Flex
Summary
Status Reset
Operation
Control
Security
ConfigSetpoints
Phase B
Phase C
Phase A
Phase A
Phase B
Phase C
Phase A
Phase B
Outputs
Comms
System
Events
Zenith
Waveform
Faults
Alarms
Control
Stats
Phasors
About
Events
Report
Diag
ATS
CT-VT
Inputs
Virtual
Waveform
Datalog
Phase C
V1 Harm
V2 Harm
I Harm
Summary
V1 Harm
V2 Harm
I Harm
Summary
V Inputs
V Outputs
S1 Setting
S2 Setting
Timers
General
Interlock
Alarms
Reset
Setup
Main menu Level 3Level 2Level 1
ExerCancel
InfoExerciser
Datalog
Test
Zenith ZTE/ZBTE Series Operation & Maintenance Manual Page 11 91R-1000
Switch ExerciserThe MX350 controller has a built-in exerciser that canbe enabled and set up from the \Exerciser\Info screen.This feature allows the user to test the system periodi-cally or to setup a schedule for operating the systemperiodically in order to minimize utility costs.
From the \Exerciser\Info screen the operator can accessall required setup parameters for scheduling exercises.It also indicates as to when the last exercise took placeand when the next exercise will be performed.
The \Home\Exerciser\Setup page displays the MX350Exerciser parameters as shown in Figure 10. Exercise typeand schedule are user-defined here for starting time,duration of exercise and whether or not the switch is totransfer the load. The mode of operation of the exerciserfunction can be selected with a time base of 1 day, 1 week,14 days, 28 days, or 365 days. With a time base of 365days, up to 24 events can be scheduled. With all othertime bases, the number of exercise events is limited to 7.
Figure 10Exerciser Values on Home\Exerciser\Setup Page
For each exercising event, the operator enters a start timeas well as a time of duration. In addition, the operator canselect the type of exercise as ‘Genstart and Transfer’ oras ‘Genstart only’. When the ‘Gen Start only’ mode isselected, the controller will start the engine, but does notactually transfer the load. In this mode, the readiness forthe engine generator set is tested. It does not test thefunctionality of the Automatic Transfer Switch itself. Inthe ‘Gen Start and Transfer’ mode, the controller startsthe engine and actually transfers the load to the alter-native source. This mode can be used to test the integrityof the emergency power system. It can also be used tosetup a schedule for times of operation when the switchload will run on an alternative power supply. This couldbe done, e.g., to avoid demand charges from a utilitycompany. If the operator chooses to abort an ongoing test,there is a ‘Test Cancel’ button on the \Exerciser\Infoscreen. This screen also contains a ‘Test’ button thatwill take the user directly to the Test screen.
The \Home\Exerciser\Test page displays the MX350system test choices, as shown in Figure 11. From theTest screen the user can perform the same operationsas performed by the exerciser. Whereas exercises are performed automatically, a Test always has to be initiated by the user.
Figure 11System Test Choices on Home\Exerciser\Test Page
There are three types of tests: Fast Test, Xfer Load, andNo Xfer. The screen also provides an END button to abortany of the three test types. To test the functionality ofthe switch the operator can use the Fast Test option.With this kind of test, the engine generator will startand the load will transfer without going through anytime delays. In order to simulate a load transfer as if anoutage was occurring, the operator can select the XferLoad test. With this test type, the engine will start upand the load will transfer according the time delay ofthe W timer. When the test is ended (by depressing theEND button), the switch will go through the U timerdelay before actually transferring back to the utility.
Controller power supply (UTA – universal transformer assembly)
System line voltage is transformed to 170Vdc to powerthe MX350 controller and 24Vdc ungrounded to powerrelays via the universal transformer assembly (UTA).The power supply is termed “universal” because the sameunit handles all line voltages from 120Vac through600Vac via an internal six-position jumper array. Figure 12shows the external connections points for the UTA. TheUTA also features a 120Vac uninterruptible power supplyinput and 24Vdc input battery options. 120Vac and24Vdc (ungrounded) must be supplied together from anuninterrupted power source. In addition, test terminalsare included for transformer voltage monitoring (seeFigure 13 for connection point definitions and Figure 14for the UTA schematic).
91R-1000 Page 12 Zenith ZTE/ZBTE Series Operation & Maintenance Manual
Figure 12Connection Points for Universal Transformer Assembly (UTA)
Figure 13Connection Points on Test Plug for Universal Transformer Assembly (UTA)
120VAC Aux Input(customer supplied) (not obligatory)
(See Note 1)
24VDC output fromUTA to I/O relays
170VDC output from UTA to MX350 controller
Source 1 voltage input
Test points
Source 2 voltage input
24VDC Aux Input (ungrounded)(customer supplied) (not obligatory)
(See Note 1)
Plug position
Test pointPlug position
Test point
20
TP119 18
TP317 16
TP515 14
TP713 12
TP911
10 9
TP28 7
TP46 5
TP64 3
TP82 1
TP10
Plug position Test point Test Connection Points Value Measured
1 TP10 TP1-TP2 Line AC voltage input from Source 12 — TP2-TP3 Voltage drop across R13 TP8 TP4-TP5 24 VAC to output from Source 1 to input/output relays4 — TP6-TP7 Line AC voltage input from Source 25 TP6 TP7-TP8 Voltage drop across R26 — TP9-TP10 24 VAC to output from Source 2 to input/output relays7 TP48 —9 TP210 —11 —12 TP913 —14 TP715 —16 TP517 —18 TP319 —20 TP1
View looking into plug
UTAmetal cover
UTA PC board
Note 1: Both Aux inputs must be supplied from an uninterrupted powersource. Supplying only one Aux input may result in malfunction.
Zenith ZTE/ZBTE Series Operation & Maintenance Manual Page 13 91R-1000
Figure 14Universal Transformer Box Assembly (UTA) Schematic
V_A R5
I/O’S
CUSTOMERUPS (120VAC)
OPTIONAL FOR KEEPINGTHE MX350 CPU ACTIVE
WITH LOSS OF SOURCE 1OR SOURCE 2 POWER
(SEE NOTE 1)
FROM
FROM TO MX350
CONTROLLER
CONTROLLERTO MX350
POWER SUPPLY (PS)
D18
D19
D20
-
+
+
-
OPTIONAL FOR KEEPING THE INPUT AND OUTPUT STRIPS ACTIVE WITH LOSS OF SOURCE 1 OR SOURCE 2 POWER (SEE NOTE 1)
NOTE 1: MUST BE SUPPLIED TOGETHER FROM AN UNINTERRUPTED POWER SOURCE
2
802
800
FROMCUSTOMER
BATTERY(24VDC)
(UNGROUNDED)
J4
1
2
1
+
-
170+
170-
J9
4
J12
2
3
1MOV3
V_B
D26
D22
D23
D24
-+
TROUBLESHOOTINGFOR SERVICETEST POINTS
REFER TOELECTRICAL
SCHEMATIC DWG.SHEET 4
D17
TO TP10
18
16
14
12
J6
3
111
1
5
7
TO TP9TO TP8
TO TP6TO TP7
TO TP5TO TP4TO TP3
2020
J310
9
31
30
3
1
Source 1AC Voltage
Source 2AC Voltage
J1
J2
21
20
3
1
V_A
V_B
TO TP2TO TP1
V_B
V_A
0TP3
TP4TP5
TP6TP7
TP6TP8
TP7TP8
TP9TP10
17VDC
D21
17VDC
120VAC
120VAC
0
JP1
JP2
JP3
TP1
TP1TP3
TP2
TP2
120VAC
120VAC
MOV2
MOV1
JP4
JP5
JP6
R4
R3
1
2
3
4
C1 MOV5
TP6
C2
12
11
R2
MOV4
D13
D14
D16
D8
D12
D4
D9
D10
~
+-
5
6
7
T2
1
2
3
4
31 10 12
5
6
7
T1
~R1
TP10TP1
7
TP7
9
TP9
12
11
D25
TP8
D6
D5
D8
D7
D4
D3
D2
D1
-+
TP5
TP2
7
9
TP4D25
TP3
91R-1000 Page 14 Zenith ZTE/ZBTE Series Operation & Maintenance Manual
Sequence of Operation
Automatic transfer switches transition from one sourceto a second source in three different ways: standard(also referred to as open), delayed and closed transition.Delayed transition switches have an intermediary mid-point location where the switch is not connected to eithersource when transferring to the non-preferred sourceafter a preferred source failure. For closed transition, bothsources are connected momentarily. Timers are utilizedto insure that sources are stable before transferring orto prevent a hurried, ultimately unnecessary transferwhen the apparently failed source was actually not ina state of failure.
When transferring with two good sources (either aretransfer back to Source 1 or a system test transfer),closed transition switches are momentarily connected to both sources for a period of less than 100 ms. The controller prevents transfer until Source 2 is in electricalsynchronism with the utility.
Sequence of Operation forBypass/Isolation Transfer Switch
An automatic transfer switch equipped with a bypass/isolation switch provides the ability to withdraw theautomatic transfer switch for testing and/or maintenancepurposes without interrupting the served load. The bypassmanual switch is the upper power panel while theautomatic switch is housed in the lower panel (seeMimic Bus and Indicator Lights Schematic in Figure 15).
Operation of the unit is quick and convenient, requiringonly one operator and less than one minute to complete.Instructions are mounted on the front of each isolationswitch door along with a mimic panel providing indicationof power source availability and bypass/ATS switchpositions.
The manual bypass switch is normally open on bothsources with the ATS feeding the system load. Duringoperation, the bypass switch is closed, paralleling theATS contacts which then allows withdrawal of the ATS tothe TEST or ISOLATE position. Mechanical and electricalinterlocks are included to prevent cross-sourcing orbypassing to a dead source.
In the TEST position, the ATS is disconnected from theload (which is instead powered through the bypasspanel). However, control power is available to the ATSto permit operational testing through the control panelof the transfer switch while removed from Source 1and Source 2.
In the ISOLATE position, the ATS is completely withdrawnand may be removed from the enclosure, if desired, formaintenance.
After the isolation operation, if the bypass is closed intoSource 1 and this source happens to fail, an auxiliarycontact on the bypass control will automatically startthe alternate generator source (Source 2). The manualhandle of the bypass may then be operated to transferthe load to Source 2. Interlocks guard against inadvertentmanual connection to an opposite source if the ATS is inthe circuit. Also, the reconnection of the ATS is preventedvia interlocks if the source positions don’t match.
Comparative sequences of operation for bypass/isolationtransfer switch as a function of rated amperage areshown in Figure 16.
Figure 15Bypass/Isolation Transfer Switch Mimic Bus and Indicator Lights Schematic
WARNINGWhile the bypass switch is out of the AUTO position/mode, the ATS is INHIBITED from automatic operation. Make certain the
ATS is left in automatic after completion of any service.
!
Zenith ZTE/ZBTE Series Operation & Maintenance Manual Page 15 91R-1000
Vert
ical
Vert
ical
Hor
izon
tal
Vert
ical
Hor
izon
tal
Vert
ical
100-
400A
600-
1200
A16
00-3
000A
4000
ASw
itch
Pos
ition
Swit
ch P
ositi
on1.
Co
nfig
urat
ion
for
Auto
mat
icO
pera
tion
• M
anua
lly o
pera
ted
Byp
ass
Switc
h co
ntac
ts (B
N/B
E) a
re o
pen
• AT
S is
sup
plyi
ng lo
ad•
Dis
conn
ect
switc
h (D
S) is
in A
UTO
• M
anua
lly o
pera
ted
Byp
ass
Switc
h co
ntac
ts(B
N/B
E) a
re o
pen
• AT
S is
sup
plyi
ng lo
ad•
Dis
conn
ect
switc
h (D
S) is
in A
UTO
• M
anua
lly o
pera
ted
Byp
ass
Switc
hco
ntac
ts (B
N/B
E) a
re o
pen
and
ATS
is s
uppl
ying
load
• D
isco
nnec
t Sw
itch
(DS)
is in
Aut
o
• M
anua
lly o
pera
ted
Byp
ass
Switc
h co
ntac
ts (B
N/B
E) a
re o
pen
• AT
S is
sup
plyi
ng lo
ad•
Dis
conn
ect
switc
h (D
S) is
in A
UTO
2.
To B
ypas
sAT
S
• O
pen
bott
om c
abin
et d
oor
• Tu
rn D
isco
nnec
t Sw
itch
(DS)
to
INH
IBIT
• Po
sitio
n m
anua
l byp
ass
hand
le (M
BH)
to s
ame
pow
er s
ourc
e at
ATS
• O
pen
bott
om c
abin
et d
oor
• Tu
rn D
isco
nnec
t Sw
itch
(DS)
to
INH
IBIT
• Tu
rn B
ypas
s Se
lect
or S
witc
h (B
SS) t
o sa
me
pow
er s
ourc
e as
ATS
• Tu
rn D
S to
Inhi
bit
• O
pen
Bypa
ss Is
olat
ion
Acce
ss p
anel
• Tu
rn B
ypas
s Se
lect
or S
witc
h (B
SS) t
osa
me
pow
er s
ourc
e as
ATS
• Po
sitio
n M
anua
l Byp
ass
Han
dle
(MB
H) u
pwar
d
• O
pen
bott
om c
abin
et d
oor
• Tu
rn D
isco
nnec
t Sw
itch
(DS)
to
INH
IBIT
• Po
sitio
n m
anua
l byp
ass
hand
le (M
BH
)up
war
d
3.
To T
est
ATS
• B
ypas
s pe
r in
stru
ctio
n #
2 ab
ove
• M
ove
ATS
loca
tion
hand
le (A
LH)
to T
EST
loca
tion
• Tu
rn D
S to
AU
TO•
Test
sw
itch
(TS)
on
bott
om
cabi
net
door
will
allo
w
elec
tric
al o
pera
tion
of A
TS
• B
ypas
s pe
r in
stru
ctio
n #
2 ab
ove
• Ro
tate
cra
nk m
echa
nism
cou
nter
-clo
ckw
ise
until
ATS
TES
T lig
ht is
illu
min
ated
• Tu
rn D
S to
AU
TO•
Test
sw
itch
(TS)
on
bott
om c
abin
et d
oor
will
allo
w e
lect
rical
ope
ratio
n of
ATS
• B
ypas
s pe
r ab
ove
inst
ruct
ions
• Ro
tate
cra
nk m
echa
nism
cou
nter
-clo
ck-
wis
e un
til A
TS T
EST
light
is il
lum
inat
ed•
Turn
DS
to A
uto
• Te
st S
witc
h (T
S) o
n m
icro
proc
esso
rco
ntro
ller
will
allo
w e
lect
rical
op
erat
ion
of A
TS
• B
ypas
s pe
r in
stru
ctio
n #
2 ab
ove
• Ro
tate
cra
nk m
echa
nism
cou
nter
-clo
ck-
wis
e un
til A
TS T
EST
light
is il
lum
inat
ed•
Turn
DS
to A
UTO
• Te
st s
witc
h (T
S) o
n bo
ttom
cab
inet
doo
r w
ill a
llow
ele
ctric
al o
pera
tion
of A
TS
4.
To Is
olat
eAT
S
• B
ypas
s pe
r in
stru
ctio
n #
2 ab
ove
• M
ove
ATS
loca
tion
hand
le (A
LH)
to IS
OLA
TE p
ositi
on
• B
ypas
s pe
r in
stru
ctio
n #
2 ab
ove
• Ro
tate
cra
nk m
echa
nism
cou
nter
-clo
ckw
ise
until
ATS
ISO
LATE
D li
ght
is il
lum
inat
ed
(See
Fig
ure
15)
• B
ypas
s pe
r ab
ove
inst
ruct
ions
• Ro
tate
cra
nk m
echa
nism
cou
nter
-cl
ockw
ise
until
ATS
IS
OLA
TED
ligh
t is
illu
min
ated
• B
ypas
s pe
r in
stru
ctio
n #
2 ab
ove
• Ro
tate
cra
nk m
echa
nism
cou
nter
-cl
ockw
ise
until
ATS
ISO
LATE
D li
ght
is il
lum
inat
ed (S
ee F
igur
e 15
)
5.
To R
emov
eAT
S
• B
ypas
s pe
r in
stru
ctio
n #
2 an
d is
olat
e pe
r #
4 ab
ove
• M
ove
ATS
loca
tion
hand
le (A
LH)
to R
ELEA
SE p
ositi
on•
Dis
conn
ect
mul
tipin
plu
gs•
Lift
ATS
out
of d
raw
er
• By
pass
per
inst
ruct
ion
#2 a
nd is
olat
e pe
r #4
abov
e•
Dis
conn
ect
mul
tipin
plu
gs &
ext
erna
l co
nnec
tions
to
ATS
• Ro
tate
four
(4) p
ower
pan
el la
tche
s to
ver
tical
posi
tion,
slid
e AT
S fo
rwar
d &
lock
mec
hani
sm
in p
lace
• Re
mov
e AT
S fr
om c
abin
et
• B
ypas
s an
d is
olat
e pe
r ab
ove
inst
ruct
ions
• O
pen
Aut
omat
ic T
rans
fer
Switc
hac
cess
pan
el•
Slid
e fo
ur c
orne
r la
tche
s of
ATS
to
inne
rmos
t po
sitio
n•
ATS
can
now
be
rem
oved
from
cab
inet
• B
ypas
s pe
r in
stru
ctio
n #
2 an
d is
olat
epe
r #
4 ab
ove
• D
isco
nnec
t m
ultip
in p
lugs
& e
xter
nal
conn
ectio
ns t
o AT
S•
Slid
e fo
r (4
) cor
ner
latc
hes
of A
TS t
oin
nerm
ost
posi
tion
• Re
mov
e AT
S fr
om c
abin
et
6.
To R
econ
nect
ATS
Afte
r Re
mov
al
• Pl
ace
ATS
into
dra
wer
slo
ts
(fron
t ro
llers
firs
t)•
Turn
Dis
conn
ect S
witc
h (D
S) to
INH
IBIT
• M
anua
lly p
ositi
on A
TS in
to s
ame
sour
ce a
s by
pass
sw
itch
• Re
conn
ect m
ultip
in p
lugs
& e
xter
nal
conn
ectio
ns t
o AT
S•
Push
ATS
inw
ard
to e
ngag
e ca
rria
ge•
Mov
e AT
S lo
catio
n ha
ndle
(ALH
) to
TEST
loca
tion
(as
indi
cate
d by
ligh
t)•
Turn
Dis
conn
ect
Switc
h (D
S) t
o AU
TO &
use
Tes
t Sw
itch
(TS)
to
elec
tric
ally
ope
rate
ATS
• Tu
rn D
isco
nnec
t Sw
itch
(DS)
to IN
HIB
IT•
Mov
e AT
S lo
catio
n ha
ndle
(ALH
) to
AUTO
loca
tion
• Tu
rn D
S to
AU
TO &
ope
n by
pass
w
ith M
BH
• AT
S is
now
fully
aut
omat
ic
• Pl
ace
ATS
in s
lide
mec
hani
sm•
Unl
ock
slid
e m
echa
nism
• Sl
ide
ATS
over
pow
er p
anel
latc
hes
&
rota
te la
tche
s to
hor
izon
tal p
ositi
on•
Turn
Dis
conn
ect
Switc
h (D
S) t
o IN
HIB
IT•
Man
ually
pos
ition
ATS
into
sam
e so
urce
as
bypa
ss s
witc
h•
Reco
nnec
t m
ultip
in p
lugs
& e
xter
nal
conn
ectio
ns t
o AT
S•
Rota
te c
rank
mec
hani
sm c
lock
wis
e un
til
ATS
TEST
ligh
t is
illu
min
ated
(See
Fig
ure
15)
• Tu
rn D
isco
nnec
t Sw
itch
(DS)
to
AUTO
& u
se
Test
Sw
itch
(TS)
to
elec
tric
ally
ope
rate
ATS
• Tu
rn D
isco
nnec
t Sw
itch
(DS)
to
INH
IBIT
•Ro
tate
cra
nk m
echa
nism
clo
ckw
ise
until
ATS
lo
catio
n po
inte
r is
alig
ned
with
AU
TO m
ark
on lo
catio
nin
dica
tor.
(ATS
mus
t be
in s
ame
sour
ce a
s by
pass
)•
Turn
DS
to A
UTO
& o
pen
bypa
ss w
ith m
anua
lby
pass
han
dle
(MB
H)
• AT
S is
now
fully
aut
omat
ic
• Ro
ll ca
rt b
ack
into
cab
inet
• Sl
ide
four
cor
ner
latc
hes
of
ATS
to o
uter
mos
t po
sitio
n•
Turn
DS
to In
hibi
t•
Man
ually
pos
ition
ATS
into
sa
me
sour
ce a
s B
ypas
s Sw
itch
• C
lose
Aut
omat
ic T
rans
fer
Switc
hac
cess
pan
el•
Rota
te c
rank
mec
hani
sm c
lock
wis
eun
til A
TS T
est
light
is il
lum
inat
ed•
Turn
DS
to A
uto
and
use
TS t
o el
ectr
ical
ly o
pera
te A
TS•
Turn
DS
to In
hibi
t•
Rota
te c
rank
mec
hani
sm c
lock
wis
eun
til A
TS lo
catio
n po
inte
r is
alig
ned
with
Aut
o m
ark
on lo
catio
n in
dica
tor.
(ATS
mus
t be
in s
ame
sour
ce a
s By
pass
)•
Turn
DS
to A
uto
and
open
B
ypas
s w
ith M
BH
• AT
S is
now
fully
aut
omat
ic
• Ro
ll AT
S ca
rt b
ack
into
cab
inet
• Sl
ide
four
(4) c
orne
r la
tche
s of
ATS
to
oute
rmos
t po
sitio
n•
Turn
Dis
conn
ect
Switc
h (D
S) t
o IN
HIB
IT•
Man
ually
pos
ition
ATS
into
sam
e so
urce
as b
ypas
s sw
itch
• Re
conn
ect
mul
tipin
plu
gs &
ext
erna
lco
nnec
tions
to
ATS
• Ro
tate
cra
nk m
echa
nism
clo
ckw
ise
until
ATS
TEST
ligh
t is
illum
inat
ed (S
ee F
igur
e 15
)•
Turn
Dis
conn
ect S
witc
h (D
S) to
AU
TO &
use
Test
Sw
itch
(TS)
to e
lect
rical
ly o
pera
te A
TS•
Turn
Dis
conn
ect
Switc
h (D
S) t
o IN
HIB
IT•
Rota
te c
rank
mec
hani
sm c
lock
wis
e un
tilAT
S lo
catio
n po
inte
r is
alig
ned
with
AU
TOm
ark
on lo
catio
n in
dica
tor.
(ATS
mus
t be
in s
ame
sour
ce a
s by
pass
)•
Turn
DS
to A
UTO
& o
pen
bypa
ss w
ithm
anua
l byp
ass
hand
le (M
BH
)•
ATS
is n
ow fu
lly a
utom
atic
7.
To O
pera
te
the
Bypa
ssSw
itch
Whe
nth
e AT
S is
inTE
ST o
r IS
OLA
TE
• M
ove
the
man
ual b
ypas
s ha
ndle
(MB
H) t
o th
e av
aila
ble
pow
er s
ourc
e
• (1
) Mov
e m
anua
l byp
ass
hand
le (M
BH) d
ownw
ard
to o
pen
the
bypa
ss p
ower
pan
el c
onta
cts,
• (2
) tur
n th
e by
pass
sel
ecto
r sw
itch
(BSS
) to
the
oppo
site
pow
er s
ourc
e, a
nd
• (3
) mov
e th
e M
BH
upw
ard
to c
lose
into
the
sele
cted
pow
er s
ourc
e
• (1
) Mov
e m
anua
l byp
ass
hand
le(M
BH) d
ownw
ard
to o
pen
the
bypa
ss p
ower
pan
el c
onta
cts,
•
(2) t
urn
the
bypa
ss s
elec
tor s
witc
h (B
SS)
to t
he o
ppos
ite p
ower
sou
rce,
and
•
(3) m
ove
the
MBH
upw
ard
to c
lose
in
to th
e se
lect
ed p
ower
sou
rce
• (1
) Mov
e m
anua
l byp
ass
hand
le (M
BH
)do
wnw
ard
to o
pen
the
bypa
ss p
ower
pane
l con
tact
s,
• (2
) tur
n th
e by
pass
sel
ecto
r sw
itch
(BSS
) to
the
opp
osite
pow
er s
ourc
e, a
nd
• (3
) mov
e th
e M
BH
upw
ard
to c
lose
in
to t
he s
elec
ted
pow
er s
ourc
e
Not
es:
• D
isco
nnec
t Sw
itch
(DS)
in IN
HIB
IT p
reve
nts
the
elec
tric
al o
pera
tion
of t
he A
TS.
• D
o no
t us
e ex
cess
ive
forc
e on
mec
hani
cal h
andl
es.
• Fi
gure
s de
pict
byp
ass
oper
atio
ns r
elat
ive
to S
ourc
e 1.
Seq
uenc
es a
re t
he s
ame
for
bypa
ss o
pera
tions
rel
ativ
e to
Sou
rce
2.•
Whe
n AT
S is
in T
EST
or IS
OLA
TE, t
he b
ypas
s sw
itch
oper
ates
as
a m
anua
l tra
nsfe
r sw
itch
to e
ither
ava
ilabl
e so
urce
, whi
ch is
indi
cate
d on
the
ligh
t pa
nel.
(See
Fig
ure
15)
FIG
. 1
BP
IS O
PEN
WIT
H A
TS IN
SO
UR
CE
1
ATS
BN
BE
SOU
RC
E 1
LOA
DSO
UR
CE
2
FIG
. 2
BP IN
SO
URC
E 1
WIT
H A
TS IN
SO
URC
E 1
ATS
BN
BE
SOU
RC
E 1
LOA
DSO
UR
CE
2
FIG
. 3
BP
IN S
OU
RC
E 1
WIT
H A
TS IN
TES
T
(
LOA
D C
ON
NEC
TIO
NS
ARE
OPE
N)
ATS
BN
BE
SOU
RC
E 1
LOA
DSO
UR
CE
2
FIG
. 4
BP
IN S
OU
RCE
1 W
ITH
ATS
ISO
LATE
D
ATS
BN
BE
SOU
RC
E 1
LOA
DSO
UR
CE
2
Figure 16Sequence of Operation for Bypass/Isolation Switches
91R-1000 Page 16 Zenith ZTE/ZBTE Series Operation & Maintenance Manual
Symptom Possible Cause(s) Corrective Action
Engine does not start
Engine start wires not terminated properly Check engine start connections
Generator is in OFF position Investigate why Engine Control Switch was turned off
Engine does not stop
U timing cycle not complete Check U timer setting
Engine start wires not terminated properly Check engine start connections
Generator in MANUAL Place generator in AUTO
Source 1 not within proper parametersCheck Source 1 voltage, frequency values, and Source 1 circuit breaker
ATS will not transfer to Source 2
Mechanical or electrical connections problemCheck all connections to SCR modules, check DS for proper operation & wire connections, check limitswitches for proper operation
Remote active inhibit signal Check for remote inhibit signal
Source 2 voltage or frequency not with acceptableparameters
Check engine start connections, generator breaker,generator output & engine control switch
Power supply connector unplugged Plug in connector
W timing cycle not complete Check W timer setting
ATS will not transfer to Source 1
Mechanical or electrical connections problemCheck all connections to SCR modules, check DS for proper operation & wire connections, check limitswitches for proper operation
Remote inhibit active Check for remote inhibit signal
DW timing cycle not complete Check DW timer setting
Source 1 voltage or frequency not within acceptable parameters Check utility & utility breakers
Power supply connector unplugged Plug in connector
T timing cycle not complete Check T timer setting
DANGERHAZARDOUS VOLTAGE CAN CAUSE
SEVERE INJURY OR DEATHTurn OFF all power before installation, adjustment or removal of transfer switch or any of its components.
!
Troubleshooting & Diagnostics
The following troubleshooting guide may be used to recognize and determine basic faults. If you go through all of the suspected faults and still require assistance, call a GE technical representative.
Table 5Basic Troubleshooting Guide for Automatic Transfer Switches
Zenith ZTE/ZBTE Series Operation & Maintenance Manual Page 17 91R-1000
Maintenance and Testing
A preventive maintenance program will insure high relia-bility and long life for the transfer switch. A preventivemaintenance program should including the following:
Inspection and CleaningThe switch should be inspected for any accumulationof dust, dirt or moisture and should be cleaned by vacu-uming or wiping with a dry cloth or soft brush. Do notuse a blower since debris may become lodged in theelectrical and mechanical components of the switchand can potentially cause damage.
Remove the transfer switch barriers and check thecondition of the contacts. Any surface deposits mustbe removed with a clean cloth (do not use emery clothor a file). Pitted or excessively worn contacts should bereplaced. General inspection of the general mechanicalintegrity of the switch should be made to identify andcorrect loose, broken or badly worn parts.
ServicingAll worn or inoperative parts must be replaced usinggenuine GE recommended replacement parts. ContactGE Technical Services for replacement parts information.
The operating mechanism of the transfer switch islubricated with Lubriplate 105. The lubricant applied at the factory will provide adequate lubrication for thelifetime of the switch. Should debris contaminate themechanism, clean and apply additional Lubriplate.
GE can provide complete preventative maintenanceservices. For additional information contact GE TechnicalServices at 1 + 800 637-1738 or 1 + 773 299-6600.
Electrical testing of the switch is discussed in the “Testing”section of this manual. A periodic test of the transferswitch under load conditions is recommended to insureproper operation. (See National Electric Code articles700 and 701)
CAUTIONDue to hazardous voltages and currents, GE recommends
that a GE Certified technician or a qualified electrician perform the installation and maintenance of the switch.
!
91R-1000 (8/10)
GE Energy – Digital Energy830 W 40th Street, Chicago, IL 60609 USA800 637 1738 www.gepowerquality.com
Information subject to change without notice. Please verify all details with GE. © 2010 General Electric Company All Rights Reserved
Extensive Customer Service and SupportSupported by a worldwide network of factory-trained Authorized ServiceCenters, our Technical Service Representatives can provide you with field service, equipment parts and preventive maintenance.
Because emergency power systems are required to operate under themost adverse circumstances, site personnel may be called upon at anytime to make decisions regarding the operation of the system, thereforetraining of these personnel is critical to the future of any installation.
GE offers a variety of training options including on-site classes for projectpersonnel, factory instruction on your equipment prior to shipment andservice schools covering transfer switches and switchgear systems.
Product OverviewWhen you purchase emergency power equipment, reliability and quality are a necessity. GE is committed to providing the highest level of qualitydemanded by the industry. Our complete product line will allow you to specify a total power management system while maintaining overall compatibility and the most comprehensive warranty in the industry.
Commitment to the CustomerAll team members at GE are aware of the critical situations in which our products are called upon to perform. With that understanding comes an obligation beyond merely fulfilling an order or turning out a product. Serving that obligation is our mission at GE.
GE’s team works with you from the first phone call through completedstart-up. Then, working hand in hand with the consulting engineer, the contractor and the facility owner/operator, we’ll ensure that the system fulfills both current and future needs.
“Commitment to our customer” has been GE’s driving force for more than100 years in the power control industry. This same sense of purpose andresponsibility will continue as we address future power control challenges.