Rockwell Automation 1407-CGCM Combination Generator Control Module - Manual (Page 110)

110 Rockwell Automation Publication 1407-UM001G-EN-P - April 2013
Chapter 5 CGCM Unit Startup
Over-excitation Voltage (59F)
Follow these steps to test that the Over-excitation voltage function is working
properly.
1. Connect a suitable load to the excitation output terminals of the CGCM
unit.
2. Decrease the field over-excitation voltage setpoint to a level that causes an
alarm.
3. Enable excitation in FCR mode with an FCR setpoint that produces a
field voltage higher than the over-excitation voltage setpoint.
4. Verify that a field over-excitation voltage alarm is annunciated following
the expected delay.
5. Reset the field over-excitation voltage setpoint to the desired level.
Generator Over-voltage (59)
Follow these steps to test that the Generator Over-voltage function is working
properly.
1. Set the generator over-voltage setpoint to a level that causes an alarm.
2. Apply simulated generator voltage signals by using the test voltage source.
3. Adjust the simulated generator voltage to exceed the generator
over-voltage setpoint.
4. Verify that a generator over-voltage alarm is annunciated following the
expected delay.
5. Reset the generator over-voltage setpoint to the desired level.
Generator Under-voltage (27)
Follow these steps to test that the Generator Under-voltage function is working
properly.
1. Connect a suitable load to the excitation output terminals of the CGCM
unit.
2. Increase the generator under-voltage setpoint to a level that causes an
alarm.
3. Enable excitation in FCR mode.
4. Clear the EngineIdle tag in the controller tag database.
5. Apply simulated generator voltage signals by using the test voltage source.
6. Adjust the simulated generator voltage below the generator under-voltage
setpoint.