EAAM057608EN
GC250 Technical Manual 105
ST.065 - "MCB status"
ST.068 -
“GCB steady closing command”.
ST.069 -
“MCB steady closing command”.
ST.070 -
“Minimum voltage coil command for GCB"
ST.071 -
"Impulse open command for GCB”
ST.072 -
"Impulse close command for GCB”
ST.073 - "Minimum voltage coil command for MCB"
ST.074 -
“Impulse open command for MCB”
ST.075 -
“Impulse close command for per MCB"
In addition, the controller makes available the generator automatic power delivery inhibition
for the AND/OR logics by means of the following internal statuses:
ST.088: from contact.
ST.090: for controls from the serial port.
10
This chapter describes all the anomalies managed by the controller. Some of these act as
protections for the loads, for the generator or for the engine. There is also signalling of specific
events in the plant management. Before describing them in detail, some definitions are
required.
We define three typologies of anomaly:
Warnings
: these anomalies do not require shutting the engine down.
They
point out to situations that are not dangerous at the moment, but the operator must
take some action because, if ignored, they could degenerate in one of the following
categories.
Deactivations
: these anomalies require shutting the engine down.
They
create hazards for the loads but not immediately for the engine. For this reason, the
controller opens immediately the GCB breaker, then it stops the engine with standard
procedure, that is with the cooling cycle. However, it is not possible to restart the
engine until the anomaly has not been acknowledged.
Alarms
: these anomalies require shutting the engine down.
They create
hazards for the loads and/or for the engine and the generator. For this reason, the
controller opens immediately the GCB breaker and stops the engine immediately with
emergency procedure, that is without the cooling cycle. It is not possible to restart the
engine until the anomaly is acknowledged.
A block can be activated if no other blocks are already active (there are some exceptions,
which will be listed below). Deactivations and early warnings can be present, though.
A deactivation can be activated only if no alarms and deactivations are already active. Some
other warnings can be active.
To activate a warning, either blocks nor deactivations must be present. Some other warnings
can be active.
When an anomaly activates, the controller performs the following:
It activates the internal horn and, if configured, also the external one. To that purpose,
in fact, you can configure an output of the controller with the feature DOF.3152
–
“Outside siren”. The output is controlled together with the inside beeper; the purpose
is that of using a more powerful beeper or a lamp.
