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Installation
Guide
SG Series
10, 20, 30 & 40 kVA
3.8 WIRING
CONNECTION
WARNING!
UPS installation and connection must be performed by qualified service
personnel only.
3.8.1 Power
connections
Input/output and DC connections are provided with terminal blocks.
Please refer to chart 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 right side of
the UPS, either top or bottom.
In case of cable entry from the top of the cabinet, remove the cover plate fitted on the roof
and provide for a suitable isolated protection cover.
In case of cable entry from the bottom remove cover plate and perform the same
procedure.
•
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 rating
WIRE SIZE RANGE
Lb - in
Nm
SG Series
/ 10 & 20 kVA
20 AWG to 3 AWG
27
3
SG Series
/ 30 & 40 kVA
16 AWG to 1 AWG
22
2.5
