104 GC250 Technical Manual
EAAM057608EN
▪
HOLDING REGISTER 102:
▪
“31” and “32” to open the GCB.
▪
“33” to close the GCB.
▪
“41” to open the MCB.
▪
“43” to close the MCB.
In
MAN
the GCB closing command, in any way it is provided, can be activated only if all the
following conditions apply:
▪
Generator voltages and frequency in tolerance for a proper time.
▪
The engine has been started by the controller (the fuel solenoid valve command must
be active).
▪
If there are no locks or deactivations.
9.6.6
Automatic power delivery of the generator inhibited.
In all automatic operating modes of the controller, the GCB breaker can be forced open by
certain causes, even if the operating logic of the
system commands it’s closing. Here is a
description of these causes.
▪
It is possible to use a digital input configured with feature DIF.2502
– “Loading
inhibition”. When this input is active, the controller commands the opening of the GCB
(and subsequent closing of the MCB, if possible).
See also the description of EJP function on par. 11.4
You can use a command from the serial port. Such command is temporary (only lasts
30 seconds): so it must be continuously confirmed if you want to keep the GCB open.
To send the commands you need to write in sequence (within 5 seconds):
▪
HOLDING REGISTER 101: write the password configured with the parameter
P.0004.
▪
HOLDING REGISTER 102:
▪
“31” or “32” to inhibit automatic power delivery (forces GCB open).
▪
“33” to remove automatic power delivery inhibition.
9.6.7
Events and signallings related to the breakers
The controller records any change of the GCB and MCB breakers status in the events log, if
enabled with bit 4 and 5 respectively, of the P.0441 parameter:
EVT.1030: GCB close command
EVT.1031: GCB open command
EVT.1032: GCB closed.
EVT.1033: GCB open.
EVT.1035: MCB close command
EVT.1036: MCB open command
EVT.1037: MCB closed.
EVT.1038: MCB open.
The board makes controls and status of the switches available, for AND/OR logics, through
the following internal statuses:
ST.064 - "GCB status"
