Rockwell Automation 1407-CGCM Combination Generator Control Module - Manual (Page 164)

164 Rockwell Automation Publication 1407-UM001G-EN-P - April 2013
Chapter 7 Troubleshooting
Loss of permanent magnet
generator (PMG/Excitation power)
(27)
Supply circuit breaker trip/fuse open Check PMG supply. Measure with
voltmeter at CGCM unit PMG input
terminals
Correct/replace PMG input
protection as required
Wiring error Check PMG supply. Measure with
voltmeter at CGCM unit PMG input
terminals
Correct wiring as required
PMG failure Check PMG supply. Measure with
voltmeter at CGCM unit PMG input
terminals
Repair as required
Incorrect configuration Check single-phase versus 3-phase
selection
Correct as required
Reverse var (40Q) Under-excitation Check UEL configuration if required, Correct as required
Incorrect operating mode selected Check selected operating mode for
operating requirements
Select as appropriate
Over-frequency (81O) Governor error Correct as required
Under-frequency (81U) Governor error Correct as required
Reverse power (32R) Governor error Correct as required
Rotating diode monitor Failed diode Remove and test diodes Replace diode
Incorrect configuration Confirm test / set up of diode
monitor parameters with active
parameters
Correct as required
Insufficient number of fly back
diodes installed
Check number of external flyback
diodes installed at CGCM excitation
output if required
Install as required
Phase rotation error (47) Wiring error See troubleshooting voltage
metering
Correct wiring as required
Generator over-current (51) Fault or large load condition
Incorrect configuration Check configuration Correct as required
Table 33 - Protection
Symptom Most Likely Cause Diagnostic Action Corrective Action