User’s Manual 39
It is possible to use this feature to stop/start one or more external generator connected in
parallel. To use this function the following condition shall be met:
The board must be configured for POWER MEASURAMENT
Input “INPUT A” (terminal 14) must be configured to acquire the KG actual status (bit 1
parameter P61=1).
“INPUT A” must be acquire the KG actual status
Parameters P56 and P58 must have values greater than 0 and P58 must be greater than
P56.
Bit 7 of parameter P61 must be set to 0 from revision EB02200080037).
This function uses also the parameter P60, in addition to those described in the previous
paragraph.
Operational procedure:
1.
Generator set not supplying: “OUTPUT 1” is not activated (floating, open circuit). On
“INPUT A” (KG status) activation (ground shorted) becomes step 2.
2.
Until P60 time i
s elapsed, “OUTPUT 1” is still not activated. During P60 time, on
“INPUT A” deactivation the procedure returns toward step 1, otherwise, at the end,
switches to step 3.
3.
“OUTPUT 1” is driven based on the measured active power:
a)
Supplied active power less than P56 threshold throughout P57 time:
“OUTPUT 1” is activated.
b)
Supplied active power greater than P58 threshold throughout P59 time:
“OUTPUT 1” is deactivated.
c)
If the supplied power value is in the range between P56 and P58 values,
“OUTPUT 1” status is not changed from the actual status.
If “INPUT A” is deactivated (KG open) the procedure switches to step 1.
NB: this function assumes that the loads are applied to the generators before the time specified
by parameter P60 is elapsed. If not, the board assumes to be in a low-load situation and then
can deactivate other generators. When the loads will be applied, in the best situation the other
generators will be restarted. In the worst situation this generator will be stopped for over-
current.
This function is used to have a visible and acoustic signal of the maximum power status. It can
be used also for automatically disconnect some of the less important loads from the generator,
in order to continue to work in the normal conditions.
If the active power is higher than P58 threshold consecutively for P59 time, the maximum
power status is set and so the “OUTPUT 1” output and the “F49” warning are activated.
If the active power is lower than P56 threshold consecutively for the P57 time, the maximum
po
wer status is reset and so the “OUTPUT 1” output and the “F49” warning are deactivated
(the “F49” warning is still present on the DST4600A panel if not acknowledged).
If the active power is between the P56 and P58 thresholds, the maximum power status and
t
he “OUTPUT 1” output and the “F49” warning are not modified.
