InteliLite4 AMF20 Global Guide
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Note:
When some setpoint is changed, its number of the communication object is written in the history log.
5.5.12 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 followed 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 an internal delay before closing the 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.
There is no delay when opening a breaker.
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 5 seconds to a close or open command,
otherwise an alarm is issued.
ON coil
An output giving a 5 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 5 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 5 seconds in the moment the breaker has to be switched off.
The output is intended for control of undervoltage coils of circuit breakers.
