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Verify and Adjust AVR Mode Operation (constant voltage)
Follow these steps to verify and adjust the AVR mode operation.
1. Adjust the AVR setpoint to the generator rated voltage.
2. Select Constant Voltage mode by disabling reactive compensation (droop).
3. Select the AVR mode of operation.
4. Monitor the generator exciter field current and generator voltage.
5. Verify that the metered generator voltage is near the rated output voltage
setpoint that you entered.
6. Adjust the AVR setpoint and verify that the metered voltage responds as
desired.
Adjust gains as required to achieve the desired result.
7. Disable excitation and allow the generator voltage to collapse.
8. With the AVR mode of operation that is still selected, enable excitation
and verify that the configured soft start is performed and the generator
voltage increases to the AVR setpoint.
Verify CGCM-DLR Unit Redundancy Operation (when applicable)
Follow these steps to verify the CGCM-DLR unit redundancy operation.
1. Determine which unit is the primary of the redundant pair by monitoring
the Spare1 tag in the Input table.
2. Disable excitation on the primary unit by removing the hardware
excitation enable input, or by clearing the software excitation enable tag, or
by removing the network connections, or by removing 24V DC control
power from the primary unit.
3. Verify that control transfers to the back-up CGCM-DLR unit and that its
status is now primary
Test Synchronization
A synchronization test is performed by using external independent metering
equipment that is connected directly to the main leads at the circuit breaker. This
test verifies that the CGCM-DLR unit properly synchronizes the generator to
the reference bus.
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
CGCM-DLR Unit Startup
Chapter 5
131
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