Deif CGC 400 - Page 42

Example 2:
7065 Mains fail control: Start engine
t
GBC
GB On
MB On
Mains failure
detected
Gen start seq
t
FD
Gen stop seq
Mains OK
Mains OK
t
FOD
t
FU
t
MBC
Gen running
Gen f/U OK
Conditions for breaker operations
The breaker sequences react depending on the breaker positions and the frequency/voltage measurements.
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 OFF, direct opening MB open
MB OFF, direct opening Alarms with fail classes:
Shut down or Trip MB alarms
CGC 400 DRH 4189340786 UK Functional descriptions
DEIF A/S Page 42 of 96