InteliLite Global Guide
120
5.5.13 Breaker control
The following power switches are controlled by the controller:
The generator circuit breaker or contactor – GCB
The Mains circuit breaker or contactor – MCB
It is possible to use either a motorized circuit breaker or contactor. Below is a list of available control outputs
that should fit all types of contactors or breakers. The following rules must be kept to when designing the wiring
of power switches:
The control outputs must be configured and wiring of the power switches must be provided in such a way,
that the controller has full control over the breakers – i.e. the controller can open and close the breaker at any
time.
The breaker must respond within max. 5 seconds to a close and open command. Special attention should be
paid to opening of motorized circuit breakers, as it could take more than 5 seconds on some types. In such
cases it is necessary to use an undervoltage coil for fast opening.
After opening the breaker, there is internal delay for another closing of breaker. Delay is 6 seconds - 5
seconds for OFF coil and 1 second for UV coil. After these 6 seconds, breaker can be closed again. For
opening of breaker there is no delay.
Breaker control outputs
Close/Open
An output for control of a contactor. Its state represents the breaker position requested by the
controller. The breaker must react within 2 seconds to a close or open command, otherwise
an alarm is issued.
ON coil
An output giving a 2 second pulse in the moment the breaker has to be closed. The output is
intended for control of close coils of circuit breakers.
OFF coil
An output giving a pulse in the moment the breaker has to be opened. The pulse lasts until
the feedback deactivates, but at least for 2 seconds. The output is intended for control of
open coils of circuit breakers.
UV coil
The GCB UV coil output is active the whole time the gen-set is running (not in idle or cooling).
The MCB UV coil output is active when the controller is switched on. The output is
deactivated for at least 2 seconds in the moment the breaker has to be switched off. The
output is intended for control of undervoltage coils of circuit breakers.
To Next Page
Loading...
