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)