Section 75 00-02-0878
2013-03-07 - 46 -
Example 2:
Parameter 7065 Mains fail control: Start engine
NOTE: The Terms:
t
F/U (Frequency / Voltage) and
t
V/F (Voltage /
Frequency) represent the same value.
Conditions for Breaker Operations
The breaker sequences react depending on the breaker positions and the
voltage/frequency 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 voltage/frequency OK MB open
MB ON, direct closing Mains voltage/frequency
OK GB open
GB OFF, direct opening MB open
MB OFF, direct opening
Alarms with fail classes:
Shut down or Trip MB alarms
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