Deif PPM 300 - Blackout Recovery Flowchart

More information
See Alarms, Alarm parameters, Action suppressed for information about suppressing alarm actions during blackout
recovery.
7.5.3 Blackout recovery flowchart
Blackout
detected
Blackout
recovery
possible
No
Yes
Voltage
on other
busbar
No
Yes
Bus tie
breaker auto
close on
No
Yes
Close bus tie
breaker
Bus tie
breaker
closed
No
Yes
Blackout
resolved
Genset
ready,
PMS control
No
Yes
Start specified
number of
gensets
Any genset
V&Hz OK
No
Yes
Close generator
breaker
Close breaker
Breaker
closed
No
Yes
Blackout
resolved
Connect the
other started
gensets
End
Start timer(s)
running
Yes
No
Blackout
continues
Blackout
resolved
Close breaker
Breaker
closed
No
Yes
Blackout
resolved
Shaft
generator
OK & auto
close
No
Yes
Shore
connection
OK & auto
close
No
Yes
1. After a blackout is detected, the power management system checks whether blackout recovery is possible. If any conditions that
prevent blackout recovery are present, then the blackout recovery is not attempted.
2. The power management system checks whether there is power on another busbar.
• If there is power on another busbar, and the bus tie breaker can be closed automatically, the controller sends the signal to the
bus tie breaker to close. This resolves the blackout.
DESIGNER'S HANDBOOK 4189340911K UK Page 245 of 521