Open The Genset Breaker; Close The Mains Breaker; Open The Mains Breaker - Deif GPC 300 Operator's Manual

3.1.10 Open the genset breaker

Mode Procedure
When the controller is in REMOTE mode, the generator breaker is opened based on a remote signal, for
REMOTE
example, from a PLC.
To open the genset breaker:
1. Push
a. If load sharing is present, the controller de-loads the breaker until the load is less than the de-load
LOCAL
b. The controller then opens the generator breaker. The breaker LED is OFF when the breaker is open.
c. If load sharing is not present or not possible, the controller immediately opens the generator breaker.
d. The breaker LED is OFF when the breaker is open.
Switchboard When the controller is in Switchboard control, the display push-buttons are not available. The breaker can
control only be opened from the switchboard.
NOTE
* If there is a position failure for the breaker, you can still attempt to try and open the breaker and push

3.1.11 Close the mains breaker

Mode Procedure
When the controller is in REMOTE mode, the mains breaker is closed based on a remote signal, for example,
REMOTE
from a PLC.
The mains must be running to close the mains breaker.
To close the breaker:
1. Push
a. The controller synchronises the mains with the busbar. (the breaker LED flashes yellow
LOCAL
b. When the mains and busbar synchronise, the controller closes the breaker.
c. When the breaker is closed, the breaker LED is green
Switchboard When the controller is in Switchboard control, the display push-buttons are not available. The mains breaker
control can only be closed from the switchboard.

3.1.12 Open the mains breaker

Mode Procedure
When the controller is in REMOTE mode, the mains breaker is opened based on a remote signal, for
REMOTE
example, from a PLC.
To open the mains breaker:
1. Push
LOCAL
When the controller is in Switchboard control, the display push-buttons are not available. The breaker can
Switchboard control
only be opened from the switchboard.
NOTE
* If there is a position failure for the breaker, you can still attempt to try and open the breaker and push
OPERATOR'S MANUAL 4189341171C UK
to open the genset breaker. *
open point (the breaker LED flashes yellow
to close the mains breaker.
• If the mains and busbar are not synchronised before the synchronisation timer expires, the breaker
does not close. The synchronisation failure alarm is activated.
to open the mains breaker. *
a. The controller opens the mains breaker. The breaker LED is OFF when the breaker is open.
b. The breaker LED is OFF when the breaker is open.
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