34006452EN/AC - Page 26
Start-up
Frequency converters – close inverter output switch Q5N on t he UPSs:
– close output switch Q5N in the maintenance bypass cubicle;
– open bypass switch Q3BP in the maintenance bypass cubicle;
– press the "inverter on" button on the control panel of a UPS:
green "load protected" light flashes for three seconds,
the inverter starts and waits for the start of the other units;
– proc eed in the same manner for each unit. When the number of running units is sufficient, the inverter output switches close
and the load is supplied by the inverters:
red "load not protected" light goes off,
green "load protected" light on the control panel goes on.
Proceed in the following order:
– check that all lines supplying the load are off or that the load is disconnected;
– close the upstream switch supplying Mains 1 power (on the LV switchboard);
– close Mains 1 input switch Q1.
The system powers up:
red "load not protected" light on the control panel goes on,
the rectifier-charger automatically starts;
– close battery circuit breaker QF1 ( systems equipped with a battery);
– close inverter output switch Q5N:
– press the "inverter on" button on the control panel:
green "load protected" light blinks for 3 seconds,
the inverter starts and awaits the start of the other inverters;
– proceed in the same manner for each line:
when they are all on or enough have been started to supply the rated load, the output switch for each running line closes.
The load is supplied and the connected devices can be started,
red "load not protected" light goes off,
green "load protected" light remainsconstant, on the control panel of each line supplying the load.
Q1 Q4S Q5N
OFF ON
(0) (I)
ON
(I) ON
(I)
6
I
+
!
!
O
6
5
2
5
Q1 Q5N
OFF ON
(0) (I)
OFF
(0)
2
QF1
OFF ON
(0) (I)
Q1 Q5N
OFF ON
(0) (I)
ON
(I)
6
I
+
!
!
O
6
5
2
5