Allen-Bradley 1407-CGCM-DLR User Manual page 171

Table 29 - Synchronizing
Symptom
No close indication from CGCM-DLR
unit
No close indication from CGCM-DLR
unit (cont.)
Close indication from CGCM-DLR
unit when sync parameters not met
Most Likely Cause
Phase not matched
Close output from CGCM-DLR unit
not being examined
Frequency not matched
Sync parameter configuration
incorrect
Voltage not matched
Configuration errors
Wiring errors
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
Diagnostic Action
Observe Phase match tag during
synchronization
Observe phase error reported by
CGCM-DLR unit during
synchronization
Monitor Close breaker tag from
CGCM-DLR unit
Observe frequency match tag during
synchronization
Observe frequency error, generator
frequency, and selected bus
frequency reported by CGCM-DLR
unit during synchronization
Observe configured synchronization
limits, VT input configuration, and
generator rated entries
Observe voltage match tag during
synchronization
Observe voltage error, generator
voltage, and selected bus voltage
reported by CGCM-DLR unit during
synchronization
Observe VT and Bus offset
configuration parameters to verify
that they reflect the
desired/expected VT wiring
Adjust manually such that test
equipment (reference) indicates
synchronism, then observe
diagnostics above. This information
can be used to determine most
likely wiring error. Voltage not
matched, verify that PT wiring and
VT ratios are correct. Phase or
frequency not matched; verify phase
rotation and polarity of VT wiring
Troubleshooting Chapter 7
Corrective Action
If phase match indicated, check
close command tag. If no phase
match indicated, check phase match
error
If no phase error is reported, correct
wiring and verify appropriate
Synchronization mode is active
If phase error reported, verify that
governor is responding to reported
error
If close indication received, check
use of tag. If no close indication,
check match errors
If frequency match indicated, check
close command tag. If no frequency
match indicated, check frequency
match error
If no frequency error is reported,
correct wiring and verify that
appropriate Synchronization mode is
active
If frequency error reported, verify
that governor is responding to
reported error
Correct any errors in the
configuration entries
If voltage match indicated, check
close command tag. If no voltage
match indicated, check voltage
match error
If no voltage error is reported,
correct wiring and verify that
appropriate Synchronization mode is
active
If voltage error is reported, verify
voltage setpoint to CGCM-DLR unit
is being adjusted appropriately to
provide voltage correction
Correct configuration to match
expected VT wiring
Correct VT wiring
171