User’s Manual 11
In this area (right top of the front panel) is displayed the status of the generator set and of the
mains. The following signals are provided:
Indicators “KG” and “KR” (green): indicate the status of the contactors managing the
power changeover. The indicator “KR” is not present for SW type 12 (/P boards). If the
green indicator is turned on the corresponding external connected contactor is closed.
The external connected contactors can never be both closed, while they can be both open
during the switching. The default configuration shows the KG and KR command status,
not the actual status. However it is possible to configure the board to use two inputs to
monitor the status:
“INPUT A” (terminal 14) for KG status
“INPUT C” (EXTERNAL OVERSPEED default configuration) (terminal 12) for KR
status
Connect the proper terminal to ground when KG or KR is activated.
When this function is enabled the indicators “KG” and “KR” work in a different way:
OFF: the contactor is open
ON: the contactor is closed
Flashing at 50% duty cycle: the contactor is open but the command is on
Flashing at 90% ON: the contactor is closed but the command is off
Indicator “ENGINE RUNNING” (green): it indicates the status of the engine of the
generator set. It takes the following meanings:
Turned off: engine shut down
Flashing: engine cooling (this condition occurs only in the AUTOMATIC mode).
Turned on: engine running
Indicator “GENERATOR LIVE” (green): it indicates the status of the generator set. It takes
the following meanings:
Turned off: the generator doesn’t produce any voltage.
Flashing: The generator is living but some of the parameters (voltages on one or
more phases or frequency) are not within the programmed tolerance limits, therefore
the users cannot be switched on it.
Turned on: The generator is living and all its parameters are within the programmed
tolerance limits, therefore it is possible to switch the users on it.
“MAINS LIVE” indicator (green): It indicates the mains status. It takes the following
meanings:
Turned of: mains failure.
Flashing: the mains is present but the voltage on one or more phases is not within
the limits of the programmed tolerance thresholds, therefore if the users are currently
switched on the generator, they will have to stay on it.
Turned on: the mains is present and within the programmed tolerance limits,
therefore the users can be switched on it.
NB: the board has an input (“MAINS SIMULATION”, terminal 24) that can be used to
inhibit the automatic operation of the genset. If this digital input is activated, independently
from what has been acquired with the mains sensor, the engine is not automatically
started.
Furthermore, there are two digital displays (each of them having 3 digits) to show the electric
quantities measured on the generator. The left display
(called display “V”)
shows the
generator’s voltages (phase-to-phase for three-phase systems, phase-to-neutral for single-
