Critical Power
Modifications reserved
Page 27/43
GE_UPS_ISG_LPS_3UL_20K_30K_2US_V010.docx
Installation Guide
LP33 Series 20 & 30 UL S2
4.8
WIRING CONNECTION
WARNING!
UPS installation and connection must be performed by QUALIFIED SERVICE
PERSONNEL only.
4.8.1
Power connections
Input/output and DC connections are provided with terminal blocks.
Please refer to chart below for torque specifications.
Carefully read the following recommendations before proceeding:
Ensure that the AC and DC external isolators are OFF and locked to prevent their inadvertent
operation.
Do not close any external isolators prior the commissioning of the equipment.
The preferred power cable entry location for installation purposes is from the bottom right side of
the UPS (see
Fig 4.8.1-1)
.
For cable entry from the bottom remove the cover plate and provide for a suitable isolated
protection cover.
The input/output cables must be connected in clockwise phase rotation for both
Bypass
and
Rectifier Input Terminals
if separate, taking care to avoid risk of short circuit between different
poles.
The grounding and neutral connection of the electrical system must be in accordance with local
regulations.
In case of additional cabinets containing batteries, input/ output transformers, etc, their ground
terminals must be connected to the UPS main ground terminal.
Once the power cables have been connected, re-install the internal safety shields and close the
cabinets by re-installing all external panels.
Torque Specifications / Mechanical Terminals / Input / Output / Battery and GND
UPS Model
WIRE SIZE RANGE
Lb - in
Nm
LP33 Series 20
Max 1/0 AWG
50
5.7
LP33 Series 30
Max 4/0 AWG
50
5.7
Fig. 4.8.1-1 Access to the input / output connections
Access to the terminals and instructions for
bottom feed cable connections
To access
Input, Output
and
Battery
connections
proceed as follows:
Open the front door “
A
” of the cabinet.
Remove the protection panel “
B
”.
Remove the bottom fascia cover “
C
” and drill
holes in bottom cover as needed.
NOTE !
For bottom feed applications, drill
appropriate holes in plate “C” for
cable conduits (max. 4 x 2”).
Please remove the plate “C” before
drilling any holes.
See
Fig 4.8.1-1
- details “C”.
C
A
B
LPS33U_0
20-030_S2
_Connectio
n_TEC_01
Q2 Q1
