Liebert GXT2 - 3X1 - Manual (Page 18)

18 Chapter 2 Installation
E1-20010329-C-1.0
Figure 2-11（b） Wire connection for 15/20kVA Master-slave hot standby UPS
Please refer to section 2.3.2 Installation Procedures( item 3 ) for wire connection
requirement for 15/20kVA Master-slave hot standby UPS.
Note
Confirm the right connection of hot line and neutral line and proper earthing. For hot
standby UPS, the batteries of master UPS and slave UPS must be connected
separately.
N U V W L N
+ - + - B_L L1 B_N
N U V W L N
- + + - B_L L1 B_N
In
pu
t GN
D
Backup UPS
Input W phase line in parallel
Input V phase line in Parallel
Input U phese line in Parallel
Input Neutral line in Parallel
Input GND in Parallel
Output GND in Parallel
Output phase line of Backup UPS is connected to the L
terminal of Master's bypass
Output neutral line of Backup UPS is connected to the N
terminal of Master's bypass
Master UPS
In
pu
t N
eut
ra
l l
in
e
In
pu
t V phas
e l
in
e
In
pu
t V
p
ha
se
lin
e
In
pu
t W
ph
as
e l
ine
Ou
tp
ut ph
as
e l
in
e
Ou
tp
ut
Ne
ut
ra
l l
ine
O
utput
GN
D