30 GC250 Technical Manual
EAAM057608EN
Terminal
Function
T.05
DOF.1006
– “Stop command when energized”.
T.06
DOF.3152
– “Outside beeper”
T.07
DOF.2004 -
“MCB steady opening command”
T.08
DOF.2034 -
“GCB steady closing command”.
5.6.1
Load switching commands SSB plants
It is the type of plant put as default on the device (P.0802=1). The default configuration of the
device provides that the T.07 and T.08 outputs are dedicated to the command of the MCB and
GCB contactors; To this purpose, it is by the way possible to configure any couple of static
outputs, including outputs T.03 and T.04, unless they are not already used for the engine
commands, matching them with the functions.
DOF.2004 -
“MCB steady opening command”
DOF.2034 -
“GCB steady closing command”.
The GCB command is used to connect the loads to the generator. The MCB command is used
to connect the loads to the mains.
Two configurations are available to switch the loads between mains and generator:
The principle diagram above indicated provides the use of two contactors MCB and
GCB
preferable mechanically and electrically interlocked
and operating in mains
voltage, so to guarantee the automatic closure of MCB with mains live even in case
of fault on the genset starting battery or on the device. This requires the use of two
relay relays with KA and KB in battery voltage coils cabled as per the diagram.
In case you use contactors directly operating in battery voltage coil, it is possible to
command them directly from the static outputs of the device, inverting the polarity of
