GE Industrial Solutions LP 33U Series 10 & 20 kVA Installation Guide - Manual (Page 26)

Modifications reserved Page 26/40
OPM_LPS_3UI_10K_20K_1US_V010.doc Installation Guide LP 33U Series 10 & 20 kVA / S1
3.9 ELECTRICAL CONNECTIONS
WARNING !
The connections to and from the UPS must be executed by QUALIFIED PERSONNEL
ONLY.
Refer to the “Safety prescriptions - Installation” described in section 1.
3.9.1 Common input utility
Fig. 3.9.1-1 Common input utility
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.
LPS33U _010-020 _Connec tion com mon_01
OFF OFF
ON ON
LOAD
X2
1 - INPUT
X1
UTILITY
L1
-1
L2
-1
L3
-1 N1
L1 L2 L3 N2
Fig. 3.9.1-2 Power connections Common Input Utility
Input utility connection
L1-1 = Rectifier + Bypass Phase A
L2-1 = Rectifier + Bypass Phase B
L3-1 = Rectifier + Bypass Phase C
N1 =
Neutral utility
PE = Earth
Output load connection
L1 =
Load phase A
L2 = Load phase B
L3 = Load phase C
N2 = Neutral load
PE = Earth load
Max. rating X1 and X2 terminals:
4 AWG (25mm 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.
Connect wire to the Terminals using appropriate tools and appropriate torque.
Torque specification for Input / Output and DC power connections on Terminals: Section 3.8.1.
NOTE !
This UPS is designed to operate in a wye-configured electrical system with a solidly
grounded neutral.