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Chapter 5
CGCM-DLR Unit Startup
126
Loss of Permanent Magnet Generator (PMG/Excitation Power) (27)
This fault is enabled only when PMG excitation is selected and excitation is
enabled. If shunt excitation is selected, skip these steps.
Follow these steps to test that the Loss of Permanent Magnet Generator function
is working properly.
1. Verify that PMG excitation is selected and that PMG phase select is
correctly set to single- or 3-phase.
2. Connect a suitable load to the excitation output terminals of the
CGCM-DLR unit.
3. Enable excitation in FCR mode with an FCR setpoint greater than the loss
of field current setpoint.
4. Remove one or more generator PMG supply-leads to the unit.
5. Verify that a generator loss of PMG alarm is annunciated following the
expected delay.
Reverse VAR (40Q)
Follow these steps to test that the Reverse VAR function is working properly.
1. Apply simulated generator voltage and current signals by using the test
current and voltage source.
2. Adjust the simulated reactive power until it exceeds the reverse VAR
setting in the negative direction.
3. Verify that a generator reverse VAR alarm is annunciated following the
expected delay.
Over-frequency (81O)
Follow these steps to test that the Over-frequency function is working properly.
1. Apply simulated generator voltage signals by using the test voltage source.
2. Adjust the simulated generator voltage frequency until it exceeds the
over-frequency setpoint.
3. Verify that a generator over-frequency alarm is annunciated following the
expected delay.
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
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