Close The Bus Tie Breaker; Open The Bus Tie Breaker - Deif GPC 300 Operator's Manual

3.4.3

Close the bus tie breaker

When the bus tie breaker closes, the busbar reconnects. The busbar acts as one busbar, and not as two independent busbars.
Control Procedure
When the controller is in REMOTE mode, the bus tie breaker is closed based on a remote signal, for example,
REMOTE
from a PLC.
To close the bus tie breaker:
1. Push
a. The controller synchronises busbar A and busbar B (the breaker LED flashes yellow
LOCAL
b. When the bus tie breaker is synchronised, the controller closes the bus tie 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 bus tie breaker
control can only be closed from the switchboard.
3.4.4

Open the bus tie breaker

When a bus tie breaker opens, the busbar divides in to two independent busbars (busbar A and busbar B). Each busbar must have
enough gensets to supply the load required, before you can open the bus tie breaker.
Control Procedure
When the controller is in REMOTE mode, the bus tie breaker is opened based on a remote signal, for example,
REMOTE
from a PLC.
To open the bus tie breaker:
1. Push
a. The controller calculates if there is enough power available on each busbar after the bus tie breaker
LOCAL
b. The controller de-loads the bus tie breaker (the breaker LED flashes yellow
c. When the bus tie breaker is de-loaded, the controller opens the bus tie breaker.
d. When the breaker is open, the breaker LED is OFF.
Switchboard When the controller is in Switchboard control, the display push-buttons are not available. The bus tie breaker
control can only be opened from the switchboard.
NOTE
* Even 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
.
• If the bus tie breaker is not synchronised before the synchronisation timer expires, the breaker
does not close. A synchronisation failure alarm activates.
. *
opens:
• If there is not enough power available:
◦ The controller does not open the bus tie breaker.
◦ The controller display shows an information message.
• If the bus tie breaker is not de-loaded before the de-load timer expires, the breaker does not open.
The de-load failure alarm is activated.
.
).
).
.
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