EAAM057608EN
GC250 Technical Manual 31
the MCB output command (see par. 5.6.2) and observing the limits of current
absorption indicated in par. 3
WARNING! With circuit breakers operating in battery voltage
and directly commanded by the controller outputs, if for any
reason the device is no more supplied and/or in case of
dysfunction, the loads are no more supplied by the mains.
Set parameter P.0220 to zero (the command can always be reversed immediately)
and set within parameter P.0219 the pause interval that you want during change-over.
The device uses logics that avoid the simultaneous closure of GCB and MCB, but by
the way we strongly recommend you, to use the mechanic or electric interlocks.
SWITCH (SIRCOVER): with only one command, the loads are changed-over to the
mains or to the generator. Configure parameter P.0220 with the time the SIRCOVER
needs for the changeover: that way the controller avoids reversing the command
before the changeover is completed, so to let SIRCOVER not to be subject to blocks).
Instead, reset the P.0219 parameter, because the pause between mains and genset
and vice-versa is ensured by the SIRCOVER.
For the changeover operation see par. 9.6
5.6.2
Load switching commands SPM plants
SPM configuration (parameter P.0802=0) provides only one circuit breaker, which
insert/release the loads on the generator. The principle diagram provides a circuit breaker
GCB
in mains voltage commanded by means of a relay; it is also possible to use a circuit
breaker in battery voltage observing the limits of current of the output used.
In this type of plant there is only one circuit contactor for manual gensets where the mains
does not exist, commanded by only one output; in this way, with the controller not supplied,
the loads are disconnected by the generator. Set to zero both parameter P.0220 and
parameter P.0219.
The default configuration of the device provides a use of the output
T.08
that is specifically
configured as default. It is by the way possible to use any digital output configured with the
function.
