Allen-Bradley 1407-CGCM User manual

Combination Generator Control Module
Catalog Numbers 1407-CGCM
User Manual

Important User Information
Read this document and the documents listed in the additional resources section about installation, configuration, and
operation of this equipment before you install, configure, operate, or maintain this product. Users are required to
familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws,
and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are required
to be carried out by suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be
impaired.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the
use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or
liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or
software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation,
Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
Labels may also be on or inside the equipment to provide specific precautions.
Allen-Bradley, Rockwell Software, Rockwell Automation, ControlLogix, Logix5000, and RSLogix are trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous environment,
which may lead to personal injury or death, property damage, or economic loss.
ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property
damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.
IMPORTANT
Identifies information that is critical for successful application and understanding of the product.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous
voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may
reach dangerous temperatures.
ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to
potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL
Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014 
3UMMARYOF#HANGES
This manual contains new and updated information. Changes throughout this
revision are marked by change bars, as shown to the right of this paragraph.
.EWAND5PDATED
)NFORMATION
This table contains the changes made to this revision.
4OPIC 0AGE
Updated the dimension diagrams 14
Updated the Configuration Messaging section 129
Added information for the Network status indicator 164
Added information for the Module status indicator 165
Updated the Get Attributes All (service code 0x01) table for Identity
Object Instance 1 198
Updated the Get Attributes All (service code 0x01) table for Identity
Object Instance 2 199
Added a Device Status for Identity Object Instance 2 199
Updated the Certification information in the Agency Certifications
table 210

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014
3UMMARYOF#HANGES
.OTES

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014 
4ABLEOF#ONTENTS
0REFACE
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
#HAPTER
'ENERAL)NFORMATION
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
#HAPTER
)NSTALLATION
Mounting Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electrical Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
#HAPTER
#'#-5NIT/PERATION
Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Operational Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
#HAPTER
#'#-5NIT#ONFIGURATION
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Overview of the Configuration Process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Create a New Module in the ControlLogix Controller . . . . . . . . . . . . . . 72
Device Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
#HAPTER
#'#-5NIT3TARTUP
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Recommended Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Recommended Start-up Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Document Configuration Parameter and Wiring Changes. . . . . . . . . . 125
#HAPTER
#'#-5NIT3OFTWARE)NTERFACE
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
CGCM Unit User Program Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
CGCM Unit Data Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
#HAPTER
4ROUBLESHOOTING
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
!PPENDIX!
4IME/VERCURRENT
#HARACTERISTIC#URVES
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
Curve Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
Time Over-current Characteristic Curve Graphs. . . . . . . . . . . . . . . . . . . 170

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014
4ABLEOF#ONTENTS
!PPENDIX"
#'#-5NIT-ATH-ODELS
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Synchronous Machine Terminal Voltage Transducer and Load
Compensator Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Voltage Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
VAR/Power Factor Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Limiters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
V/Hz Limiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Soft Start Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Field Current Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
!PPENDIX#
!DDITIONAL#ONTROL.ET.ETWORK
)NFORMATION
ControlNet Application Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
!PPENDIX$
3PECIFICATIONS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
!PPENDIX%
$ETAILED#'#-5NIT4AG
$ESCRIPTIONS
Generator Parameters and Configuration Status . . . . . . . . . . . . . . . . . . . 213
General Excitation Control Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
AVR Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
FCR Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Power Factor Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
VAR Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
Excitation Control Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
Synchronizing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Load Sharing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Metering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
!PPENDIX&
#ONFIGURATION2ECORD
7ORKSHEET
Generator Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
)NDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014 
0REFACE
The information in this manual applies to the 1407-CGCM module, Series D,
Revision A, with host firmware revision 4.25 and ControlNet firmware
revision 1.07. The manual notes differences with earlier versions of the product
where they occur.
!DDITIONAL2ESOURCES
These documents contain additional information concerning related products
from Rockwell Automation.
You can view or download publications at http://www.rockwellautomation.com/
literature/. To order paper copies of technical documentation, contact your local
Allen-Bradley distributor or Rockwell Automation sales representative.
2ESOURCE $ESCRIPTION
Safety Guidelines for the Application,
Installation and Maintenance of Solid State
Controls, publication SGI-1.1
Describes some important differences between
solid-state equipment and hard-wired
electromechanical devices.
ControlNet Coax Media Planning and
Installation, publication CNET-IN002 Provides installation procedures for the
ControlNet network.
Logix5000™ Controllers Common Procedures,
publication 1756-PM001 Provides information about RSLogix™ 5000
software.
CGCM Release Notes, publication 1407-RN001 Provides information on compatible RSLogix
5000 software versions and ControlLogix®
controller firmware revisions.
Industrial Automation Wiring and Grounding
Guidelines, publication 1770.4.1.Provides general guidelines for installing a
Rockwell Automation industrial system.
Product Certifications website,
http://www.ab.com Provides declarations of conformity, certificates,
and other certification details.

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014
0REFACE
.OTES

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014 
#HAPTER 
'ENERAL)NFORMATION
)NTRODUCTION
The Combination Generator Control Module (CGCM unit) is a
microprocessor-based control and protection device. The CGCM unit is
designed to integrate with a Logix family programmable controller to provide
generator control, protection and synchronization functions. Programmability of
system parameters, regulation settings, and protective functions enable the
CGCM unit to be used in a wide range of applications.
&UNCTIONS
The following sections outline the functions of the unit.
'ENERATOR2EGULATIONAND#ONTROL&UNCTIONS
This list contains the generator regulation and control functions:
•Four excitation control modes
•Automatic voltage regulation (AVR)
•Manual or field current regulation (FCR)
•Power factor (PF)
•Reactive power (VAR)
•Soft start voltage buildup with an adjustable ramp in AVR and FCR
control modes
•Over-excitation (OEL) and under-excitation (UEL) limiting in AVR,
VAR, and PF control modes
•Under-frequency compensation (Volts/Hertz)
•Line drop compensation
•Auto-tracking between operating modes and between redundant CGCM
units
•Automatic transfer to a back-up CGCM unit in redundant systems
•Generator paralleling with reactive droop compensation or cross-current
(reactive differential) compensation
•Generator paralleling with real power load sharing
•Synchronizing for one or two circuit breakers

 Rockwell Automation Publication 1407-UM001H-EN-P - November 2014
#HAPTER General Information
'ENERATOR0ROTECTION&UNCTIONS
This list contains the generator protection functions:
•Loss of excitation current (40)
•Over-excitation voltage (59F)
•Generator over-voltage (59)
•Generator under-voltage (27)
•Loss of sensing (60FL)
•Loss of permanent magnet generator
(PMG/Excitation power) (27)
•Reverse VAR (40Q)
•Over-frequency (81O)
•Under-frequency (81U)
•Reverse power (32R)
•Rotating diode monitor
•Phase rotation error (47)
•Generator over-current (51)
-ETERING&UNCTIONS
This list contains the metering functions:
•Voltag e
•Current
•Frequency
•Real Power
•Apparent Power
•Reactive Power
•Power Factor
•Real Energy (kWh)
•Apparent Energy (kVAh)
•Reactive Energy (kVARh)
•Controller Excitation Current and Voltage
•Diode Monitor Ripple Level
•Load Share Error
•Synchronization Parameters

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014 
General Information #HAPTER 
)NPUTS
This list contains the inputs for the CGCM unit:
•Single-phase or 3-phase true rms generator voltage sensing
•Single-phase dual bus or 3-phase single bus voltage sensing
•3-phase generator current sensing (1 or 5 A nominal)
•Single-phase cross current loop 1 or 5 A current transformer (CT) input
•Auxiliary ±10V DC input providing remote control of the setpoints
•DC power input
/UTPUTS
This list contains the outputs for the CGCM unit:
•Pulse-width modulated output power stage rated at 15 A
•Discrete redundancy relay output
•Discrete fault output driver
•Load sharing connection for use with the Allen-Bradley Line
Synchronization Module (1402-LSM) or compatible hardware
#OMMUNICATION)NTERFACES
The CGCM unit has these three communication ports:
•Redundant ControlNet connector
•RS-232 port for dedicated communication with a redundant CGCM
•RS-232 port for factory configuration and test (not for customer use)

 Rockwell Automation Publication 1407-UM001H-EN-P - November 2014
#HAPTER General Information
.OTES

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014 
#HAPTER 
)NSTALLATION
-OUNTING2EQUIREMENTS
This equipment is intended for use in a Pollution Degree 2 Industrial
Environment, in over-voltage Category II applications (as defined by IEC
publication 60664-1). Because the units contain a heat sink, they must be
mounted vertically. Any other mounting angle reduces the heat dissipation
capabilities of the units, possibly leading to premature failure of critical
components. The unit can be mounted anywhere that the ambient temperature
does not exceed the rated environmental conditions or clearance requirements.
The clearance requirements for the CGCM unit are:
•63.5 mm (2.5 in.) of clearance is required on both sides of the unit when
mounted.
•101.6 mm (4 in.) of clearance is required above and below the unit when
mounted.
Overall dimensions for the unit are shown in CGCM Unit Overall Dimensions
on page 14.
7!2.).'Explosion Hazard
sSubstitution of components can impair suitability for Class I, Division 2.
sDo not replace components or disconnect equipment unless power has been switched
off or the area is known to be non-hazardous.
sDo not connect or disconnect components unless power has been switched off or the
area is known to be non-hazardous.
sThis product must be installed in an enclosure. All cables connected to the product
must remain in the enclosure or be protected by conduit or other means.
sAll wiring must comply with N.E.C. article 501-4(b).

 Rockwell Automation Publication 1407-UM001H-EN-P - November 2014
#HAPTER Installation
&IGURE#'#-5NIT/VERALL$IMENSIONS

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014 
Installation #HAPTER 
%LECTRICAL#ONNECTIONS
The CGCM unit’s connections are dependent on the application and excitation
scheme. All inputs or outputs cannot be used in a given installation. Incorrect
wiring can result in damage to the unit.
Connect the CGCM unit’s terminals with copper wire rated for a minimum of
600V. General appliance wire rated for minimum temperatures of 105
°
C
(221
°
F) is acceptable. All wire must be copper. Select circuit conductors based on
good design practice.
The wire gauge range listed in the Terminal Block Label Description table
indicates the physical capabilities of the connector.
The CGCM unit’s terminals are on the front, bottom, and right panel of the unit.
The nine-pin connector on the bottom of the unit is used for communication
between CGCM units in a redundant system. Suggested torque for terminal
screws is 1 N•m (9 lb•in).
Refer to pages 17…34 for typical connection diagrams.
Terminals to be used as landing points for shielded wires are provided on several
terminal strips. Shield terminals with the same name are internally connected
together but are not connected to protective earth or any internal unit circuitry.
4ABLE4ERMINAL"LOCK,ABEL$ESCRIPTION
4ERMINAL"LOCK 7IRE'AUGE
2ANGE
,ABEL $ESCRIPTION
TB1 2.6…2.1 mm
2
(10…12 AWG)
PMG A Phase A excitation power supply
PMG B Phase B excitation power supply (three phase only)
PMG C Phase C excitation power supply
SHLD1 Shield 1 landing points are tied together but are not connected internally to protective earth or
other unit circuitry
SHLD1
TB2 SHLD2 Shield 2 landing points are tied together but are not connected internally to protective earth or
other unit circuitry
SHLD2
EXC(-) Excitation output negative
EXC(+) Excitation output positive

 Rockwell Automation Publication 1407-UM001H-EN-P - November 2014
#HAPTER Installation
TB3 2.6…2.1 mm
2
(10…12 AWG)
ID(+)1 A 1 A cross-current compensation CT input
ID(+)5 A 5 A cross-current compensation CT input
ID(-) Cross-current compensation CT common input
I3(+)1 A 1 A phase C CT input
I3(+)5 A 5 A phase C CT input
I3(-) Phase C CT common input
I2(+)1 A 1 A phase B CT input
I2(+)5 A 5 A phase B CT input
I2(-) Phase B CT common input
I1(+)1 A 1 A phase A CT input
I1(+)5 A 1 A phase A CT input
I1(-) Phase A CT common input
TB4 1.6…1.0 mm
2
(14…18 AWG)
BAT(+) 24V DC control power input
BAT(-) 24V DC control power return
FLT Open collector fault output
RD RLY Open collector output for redundancy relay
CH GND Chassis ground
TB5 V Gen A Phase A generator voltage input
V Gen B Phase B generator voltage input
V Gen C Phase C generator voltage input
V Gen N Neutral generator voltage input
TB6 V Bus A Phase A bus voltage input
(1)
V Bus B Phase B bus voltage input
(1)
V Bus C Phase C bus voltage input
V Bus N Neutral bus voltage input
TB7 1.6…1.0 mm
2
(14…18 AWG)
VREF(+) Remote setpoint adjust input
VREF(-) Remote setpoint adjust input return
SHLD3 Shield 3 landing points are tied together but are not connected internally to protective earth or
other unit circuitry
SHLD3
A-COM Analog common
EX-D(+) Excitation enable input
EX-D(-) Excitation enable return
LS(+) Real power load sharing input
LS(-) Real power load sharing return
SHLD4 Shield 4 landing point is not connected internally to protective earth or other unit circuitry
(1) When used in a dual breaker configuration, Bus A voltage input is wired from V Bus A to V Bus N and Bus B is wired from V Bus B to V Bus N.
4ABLE4ERMINAL"LOCK,ABEL$ESCRIPTION
4ERMINAL"LOCK 7IRE'AUGE
2ANGE
,ABEL $ESCRIPTION

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014 
Installation #HAPTER 
%XCITATION0OWER
Excitation power is wired to the PMG terminals, whether connected to the
generator output (Shunt Excited) or to a PMG. Connect shunt excited inputs
with a voltage transformer (VT).
PMG inputs are on TB1 and are labeled PMG A, PMG B, and PMG C,
illustrating their respective phase relationships. Single-phase excitation power
must be connected to terminals PMG A and PMG C. Twisted, shielded cabling is
required for the PMG inputs.
Refer to the wiring diagrams below.
&IGURE%XCITATION0OWER#ONNECTIONSPHASE0-'
&IGURE%XCITATION0OWER#ONNECTIONS3INGLEPHASE0-'
&IGURE%XCITATION0OWER#ONNECTIONS3INGLEPHASE3HUNT
4"
0-'!
0-' "
0-'#
3(, $ 
3(, $ 
0-'

4"
0-'!
0-'"
0-'#
3(,$ 
3(,$ 
0-'
4"
0-'!
0-'"
0-'#
3(,$ 
3(,$ 
&USE
'
!#
"


 Rockwell Automation Publication 1407-UM001H-EN-P - November 2014
#HAPTER Installation
&IGURE%XCITATION0OWER#ONNECTIONSPHASE3HUNT
&IGURE%XCITATION0OWER#ONNECTIONS!2%0'ENERATOR
4"
0-'!
0-'"
0-'#
3(,$ 
3(,$ 
&USE
&USE
'
!#
"

4)0
This diagram is based on a Leroy Somer 300 kW AREP (auxiliary winding
regulation excitation principle) machine. Details can differ on other
machines.

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014 
Installation #HAPTER 
%XCITATION/UTPUT
The excitation outputs are on TB2 and are labeled EXC(+) and EXC(-).
Twisted, shielded cabling is required for the excitation outputs.
&IGURE%XCITATION/UTPUT#ONNECTIONS.ONREDUNDANT#'#-
When the redundancy function is used, three or four external flyback diodes in
series must be placed across the generator field winding.
Refer to the redundancy wiring diagrams on pages 31…32.
#ONTROL0OWER
The 24V DC control power inputs are on TB4 and are labeled BAT(+) and
BAT(-).
&IGURE#ONTROL0OWERAND#HASSIS'ROUND#ONNECTIONS
4"
3HLD
3HLD
%8# 
%8# 
%XCITERFIELD
%XCITERVOLTAGE
CONNECTIONS

4"
"!4
"!4
&,4
2$2,9
#('.$
6$##ONTROL
0OWER 3OUR CE
'ROUND ST UD
TYPICAL
'ROUNDBUS
#'#- 


 Rockwell Automation Publication 1407-UM001H-EN-P - November 2014
#HAPTER Installation
#HASSIS 'ROUND
The terminal labeled CH GND, on TB4, is the chassis ground. Ground studs are
also provided on the lower part of the mounting flanges and are internally
connected to the CH GND terminal. Connect chassis ground to earth ground
with minimum 2.6 mm
2
(10 AWG) copper wire attached to either stud on the
lower part of either side of the unit and to the CH GND terminal with 1.6 mm
2
(14 AWG) copper wire. When installed in a system with other CGCM units, use
a separate lead to the ground bus from each unit.
!#6OLTAGEAND#URRENT3ENSING
The CGCM unit supports generator and bus voltage sensing and generator
current sensing.
'ENERATORAND"US6OLTAGE3ENSING
CGCM units accept single-phase or 3-phase generator and bus voltage sensing
input with nominal voltages of 120 or 208V AC.
Refer to Terminal Block Label Description on page 15 for possible wiring
configurations.
The terminals found on TB5 provide connections for generator voltage sensing
and are labeled V GEN A, V GEN B, V GEN C, and V GEN N. The terminals
found on TB6 provide connections for bus voltage sensing and are labeled V BUS
A, V BUS B, V BUS C, and V BUS N. The connection examples below show
typical connections for various generator and bus connection schemes.
The CGCM unit supports these generator connection schemes:
•Single-phase
•Delta or Two-transformer Open Delta
•Three-wire Wye
•Four-wire Wye
The CGCM supports these bus connection schemes:
•Single-phase
•Delta or Two-transformer Open Delta
•Three-wire Wye
•Four-wire Wye
•Dual Breaker, Single-phase only