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34006452EN/AC - Page 25
Start-up
Modular UPS with external maintenance bypass
Proceed in the following order:
– check that all lines supplying the load are off or that the load is disconnected;
– in the maintenance bypass cubicle, open output switch Q5N, then close bypass switch Q3BP;
– close the upstream switch (on the low-voltage switchboard) supplying power to the Mains 1 inputs on the UPSs;
– close the Mains 1 input switch Q1 on the UPSs to supply them with power:
– the rectifier/chargers automatically start;
– red "load not protected" light on the control panels of the UPSs goes on:
– close battery circuit breaker QF1 on the UPSs:
– close the upstream switches (on the low-voltage switchboard) supplying power to the Mains 2 inputs on the UPSs, then
close the Mains 2 input switch Q4S on the UPSs:
Q1
Q5N
QF1
Q3BP
Q4S
Q1
Q5N
QF1
Q3BP
Q4S
Galaxy UPS 2
load
battery
inverter
mains 1
rectifier-
charger
static switch
mains 2
Galaxy UPS 1
battery
inverter
mains 1
rectifier-
charger
static switch
mains 2
Q1 Q4S Q5N
OFF
ON
(0)
(I)
OFF
(0)
OFF
(0)
2
I
+
!
!
O
2
QF1
OFF
ON
(0)
(I)
Q1 Q4S Q5N
OFF
ON
(0)
(I)
ON
(I)
OFF
(0)