THOMSON MEC 320 - GENSET CONTROLLER - Page 34

MEC 320 GENSET CONTROLLER
PM079 Rev 0 07/06/08 34 Thomson Technology
The conditions for the ON and OFF sequences are described in the table below:
Conditions for breaker operations
Sequence Condition
GB ON, direct closing Running feedback
Generator frequency/voltage OK
MB open
MB ON, direct closing Mains frequency/voltage OK
GB open
GB ON, synchronizing Running feedback
Generator frequency/voltage OK
MB closed
No generator failure alarms
MB ON, synchronizing Mains frequency/voltage OK
GB closed
No generator failure alarms
GB OFF, direct opening MB open
MB OFF, direct opening Alarms with fail classes:
Shut down
Trip GB alarms
GB OFF, deloading MB closed
MB OFF, deloading Alarms with fail classes:
Trip and stop