Electrical Connections; Common Input Utility - GE lp33 20 series Installation Manual

4.9

ELECTRICAL CONNECTIONS

WARNING !
The connections to and from the UPS must be executed by QUALIFIED PERSONNEL
ONLY. Refer to the "Safety Rules - Installation" described on page 6.

4.9.1 Common input utility

Fig. 4.9.1-1 Common input utility
X4
Battery
+
-
0
X1 Utility 1 - Input utility connection
L1 = Rectifier + Bypass Phase A
L2 = Rectifier + Bypass Phase B
L3 = Rectifier + Bypass Phase C
N1 = Utility Neutral
Max. rating X1, X2 and X3 terminals:
Connect wire to the Terminals using appropriate tools and appropriate torque shown in Section 4.8.1.
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.
This UPS is designed to operate in a wye-configured electrical system with a solidly
grounded neutral.
Modifications reserved
GE_UPS_ISG_LPS_3UL_20K_30K_2US_V010.docx
Critical Power
X1
Utility 1
Fig. 4.9.1-2 Terminals for common input mains
PE = Main Ground
LP33 Series 30
LP33 Series 40
Common input utility
The UPS delivered in standard
version has common input utility.
Only one input line (F1) supplies
both rectifier and bypass input
terminals.
Bear in mind that when the utility
fuses are opened there is a supply
failure to the rectifier as well as to
the automatic bypass and manual
bypass.
X3 Load - Output load connection
L1 = Load Phase L1
L2 = Load Phase L2
L3 = Load Phase L3
N2 = Load Neutral
1/0 AWG (70mm
4/0 AWG (95mm
Installation Guide LP33 Series 20 & 30 UL S2
X3
Load
PE = Load Ground
)
2
)
2
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