Table 3.11 BUS TIE breaker controller LED functions
No. Name Function
1 Busbar A
Green: The busbar A voltage and frequency are OK, and the controller can close the breaker.
Green (flashing): The busbar A voltage and frequency are OK, but the V&Hz OK timer is still running.
The controller cannot close the breaker.
Yellow: The busbar A voltage and frequency are measurable, but not OK. The controller cannot close the
breaker.
Red: The busbar A voltage is too low to measure. The controller can close the breaker.
Red (flashing): The blackout detection timer is running and the controller is checking the busbar A.
2
Bus tie
breaker
Green: The breaker is closed.
Yellow: The breaker spring is charging (only applies to a compact breaker).
Yellow (flashing): The controller is synchronising or de-loading the breaker.
Red: The controller tripped the breaker, and the trip alarm is unacknowledged and/or the alarm condition
is still present.
Red (flashing): Breaker configuration failure, or a position failure.
OFF: The breaker is open.
3 Busbar B
Green: The busbar B voltage and frequency are OK, and the controller can close the breaker.
Green (flashing): The busbar B voltage and frequency are OK, but the V&Hz OK timer is still running.
The controller cannot close the breaker.
Yellow: The busbar B voltage and frequency are measurable, but not OK.
Red: The busbar B voltage is too low to measure. The controller can close the breaker.
Red (flashing): The blackout detection timer is running and the controller is checking the busbar B.
BUS TIE breaker controller push-buttons
Figure 3.12
BUS TIE breaker controller display unit push-buttons
Table 3.12 BUS TIE breaker controller push-button functions
No. Name Function
1 Close bus tie breaker
PMS control: The controller starts the breaker close sequence.
Switchboard control: The controller ignores the input from this push-button.
2 Open bus tie breaker
PMS control: The controller starts the breaker open sequence.
Switchboard control: The controller ignores the input from this push-button.
PPM 300 Operator's manual 4189340910 UK
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