Critical Power
Modifications reserved
Page 30/43
GE_UPS_ISG_LPS_3UL_20K_30K_2US_V010.docx
Installation Guide
LP33 Series 20 & 30 UL S2
4.9.2
Dual input utility (option)
Fig. 4.9.2-1 Dual input utility (option)
Dual
input utility
On request, the UPS can be
delivered for
dual input utility
.
Two independent lines (
F2
and
F3
)
supply separately the
rectifier
and
the
bypass
inputs
With this configuration, when the
rectifier-input
fuses are opened, the
automatic
bypass
and
the
maintenance bypass
are supplied
by the other line.
Fig. 4.9.2-2 Terminals for dual input utility
X1 Mains 1 - Rectifier input utility connection
L1-1
= Rectifier Phase A
L2-1
= Rectifier Phase B
L3-1
= Rectifier Phase C
N1
= Mains Neutral
PE
= Main Ground
X2 Mains 2 - Bypass input utility connection
L1-2
= Bypass Phase A
L2-2
= Bypass Phase B
L3-2
= Bypass Phase C
N
= Mains Neutral
X3 Load - Output load connection
L1
= Load Phase A
L2
= Load Phase B
L3
= Load Phase C
N2
= Load Neutral
PE
= Load Ground
Connect wire to the
terminals
by using
appropriate tools and appropriate torque shown
in
Section 4.8.1
.
Max. rating
X1
,
X2
,
X3
and
X4
terminals:
LP33 Series 30
1/0 AWG
(70mm
2
)
LP33 Series 40
4/0 AWG
(95mm
2
)
NOTE !
For UPS correct operation, the input utility phase rotation must be clock-wise.
Inside the UPS, all neutrals
N1
and
N2
are connected together.
NOTE !
This UPS is designed to operate in a wye-configured electrical system with a solidly
grounded neutral.
LPS33U
_030-04
0_Conn
ection s
eparate
_02US
Utility 1
X4
Battery
Load
X1
X3
L
1
-1
L
2
-1
L
3
-1
N1
PE
L1
L2
L3
N2
PE
-
0
+
PE
Utility 2
X2
L
1
-2
L
2
-2
L
3
-2
N
