Power-Circuit Wiring Diagrams - MGE UPS Systems Galaxy PW 30 kVA Installation Manual

Installation (cont.)
(qualified personnel only)

Power-circuit wiring diagrams

The single-wire diagrams for typical
UPS installations are given in figures 8
to 11. The heavy lines represent the
cables that must be connected (see the
table in the previous chapter for the
required cross-sectional areas of the
cables).
see figure 8 for a single-UPS
Galaxy PW unit;
Key for figures 8 and 9:
1: normal AC source,
2: bypass AC source,
A: the rectifier/charger module,
B: the inverter module,
C: the static-bypass module,
D: the battery cubicle next to the
Galaxy PW UPS cubicle,
E: any additional battery cubicles,
F: the equipotential-bonding
connection between cubicles,
G: K3N contactor or output static-
switch module.
10 -
E-51028231XU/BH
see figure 9 for a two parallel Galaxy
PW units combined for redundancy.
see figure 10 for a two parallel Galaxy
PW units combined for higher output;
see figure 11 for a Galaxy PW
frequency converter without a battery;
Galaxy PW single-UPS unit
1
Q1
2
Galaxy PW
Fig. 8
Galaxy PW parallel connection for redundancy
1
Q1
2 2
Galaxy PW
1
Q1
2
Galaxy PW
Fig. 9
QF1 + – + –
E
D
F
F
A B G
Q4S
C
Q3BP
QF1 + – + –
E
D
F
F
A B G
Q4S
C
QF1 + – + –
D
F
F
A B G
Q4S
C
Q5N
Q5N
Q3BP
E
Q5N
Q3BP