Allen-Bradley 1407-CGCM, User Manual, Page: 119 / 252

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014
CGCM Unit Startup #HAPTER
6ERIFY#'#-5NIT2EDUNDANCY/PERATIONWHENAPPLICABLE
Follow these steps to verify the CGCM unit’s redundancy operation.
1. Determine which CGCM unit is the primary of the redundant pair by
monitoring the Spare1 tag in the Input table.
2. Disable excitation on the primary CGCM unit by removing the hardware
excitation enable input, or clearing the software excitation enable tag, or
removing the ControlNet connections, or removing 24V DC control
power from the primary CGCM unit.
3. Verify that control transfers to the back-up CGCM unit and that its status
is now primary
4EST3YNCHRONIZATION
Synchronization testing is performed by using external independent metering
equipment connected directly to the main leads at the circuit breaker. This test
verifies that the CGCM unit properly synchronizes the generator to the reference
bus.
'ENERATOR"REAKERIN4EST0OSITION
Follow these steps to test synchronization when the generator breaker is in the
test position.
1. Verify the generator main circuit breaker is in a test position that prevents
the breaker from closing when the CGCM unit issues a close command.
2. Observe the generator voltage, bus voltage, frequencies, and phase
synchronization by using independent metering equipment.
3. Initiate synchronization in the CGCM unit.
4. Confirm that the CGCM unit reports appropriate error signals and issues
a close command when appropriate as indicated by independent metering
equipment.
'ENERATOR"REAKERIN.ORMAL0OSITION
Follow these steps to test synchronization when the generator breaker is in the
normal position.
1. Place the generator main circuit breaker into the normal position that
enables the breaker to close when the CGCM unit issues a close command.
2. Select manual load control for the prime mover.
3. Select Voltage Droop mode for the CGCM unit.
4. Initiate synchronization.