GE Industrial Solutions SG Series 50 & 80 kVA Installation Guide - Manual (Page 25)

3.8.3 Power connection dual input utility
S
GT
5
00
0_
05
0-
08
0_
UP
S
co
nn
ec
ti
o
n
separate_02US
OF
F
ON
ON
OF
F
LOAD
INPUT
RECTIFIER
1 -
PE
L1-1
X1
L1
L2
L3
N
PE
L2-1
L3-1
N - Bypass
X2
2- IN
PU
T
B
Y
P
ASS
L1-2
L2-2
L3-2
L3
L2
L1
Fig. 3.8.3-1 Power connections Dual Input Utility
SG Series 50 & 80 kVA Max. rating X1 and X2 terminals: 4/0 AWG (95mm 2 )
Dual Input Configuration Rectifier / Bypass
L1-1 Rectifier Phase A L1-2 Bypass Phase A
L2-1 Rectifier Phase B L2-2 Bypass Phase B
L3-1 Rectifier Phase C L3-2 Bypass Phase C
PE N - Bypass Bypass Neutral Ground
For dual input configurations, a neutral conductor is required from the bypass source only.
The interconnection links BR1, BR2 and BR3 MUST BE REMOVED (see Fig. 3.8.3-2).
Output Load
L1 Load Phase A L2 Load Phase B L3 Load Phase C
N PE Load Neutral Load Ground
Cable terminations are to the Rectifier / Bypass Input Terminals and Load Output Terminals as shown
above.
Connect wire to the Terminals using appropriate tools and appropriate torque.
Torque specification for Input / Output and DC power connections on Terminals: see Section 3.8.1.
NOTE !
This UPS is only designed to operate in a wye-configured electrical system with a
solidly grounded neutral.
If the UPS is equipped with an input transformer, the secondary of the transformer
must be wye-configured with neutral solidly grounded.
Modifications reserved Page 25/38
OPM_SGS_ISG_50K_80K_0US_V040.doc Installation Guide SG Series 50 & 80 kVA