IM-NT-2.3
Operator Guide ©ComAp
– January 2018
22
IM-NT-2.3 Operator Guide.pdf
The asterix mark disappears when an alarm is accepted by FAULT RESET. Non-active
alarms immediately disappear from the list. Active alarm list appears on the screen
automatically when a new alarm comes up and the Main MEASUREMENT screen was
selected.
Hint:
Alarm list does not activate automatically if the display is switched to any other screen than the first
one of MEASUREMENT (typically the screen that shows menu selector on the upper). The automatic
jump to the alarm list screen will not occur if you are listing through the measured values, set points or
history!
If setpoint
Engine protect
:
ResetActAlarms
is set to DISABLED, only inactive alarms can be reset.
If an active alarm is present in the alarm list, controller display blinks every 30 seconds.
When to Use MCB ON/OFF Button?
The button is disabled in AUT mode.
In MAN and TEST modes it is enabled, but before closing of the circuit beaker, bus voltage and
frequency must be within limits. The controller has internal protection to avoid the breaker closure
without synchronizing.
Use the MCB button in MAN or TEST mode to close or open the MCB.
Be careful while doing this,
because you can disconnect the load from gen-sets!!!
The controller recognizes automatically:
•
if there is mains / bus voltage and the gen-set(s) shall be synchronized before closing the
GCB
•
or if there is no voltage on the bus and the MCB can be closed without synchronizing
When to Use MGCB ON/OFF Button?
The button is disabled in AUT mode.
The controller has internal protection to avoid the breaker closure without synchronizing. Use this
button in MAN or TEST mode to close or open the MGCB.
Be careful while doing this, because you
can disconnect the load from the mains!!!
The controller recognizes automatically:
•
if there is mains / bus voltage and the gen-set(s) shall be synchronized before closing the
MGCB
•
or if there is no voltage on the bus and the MGCB can be closed without synchronizing
