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Installation
Guide
SG Series
225 & 300 kVA
3.7 ELECTRICAL
WIRING
UPS installation and connection must be performed by qualified service
personnel only.
It is the responsibility of the installation technician to ensure that all local
and national electric codes are adhered to.
3.7.1 Utility input connection
Ensure that the AC and DC external isolators are OFF and locked out to prevent
their inadvertent operation.
Do not apply power to the equipment prior to the commissioning by a qualified
service engineer.
Before any other input connection, connect and check the grounding wire.
The UPS has available input terminations for the
Rectifier
and
Bypass
.
The unit may be powered from a
common input
source or
separate input
sources if desired.
Separate input Rectifier & Bypass
(recommended)
The
Bypass
and
Rectifier Inputs
are to be powered from different
Utility supplies
(
F1
and
F2
inputs).
In this case, when the
Rectifier Input Fuses
are opened, the
Bypass
and the
Manual
Bypass
are supplied by the other source.
In this case, remove the interconnection links
BR1
,
BR2
and
BR3
on the
input terminals or bus bars. See
Fig. 3.8.3-2
.
Common input Rectifier & Bypass
The
same power source
is to be used for both
Bypass Supply
and
Rectifier Input
(input
F3
).
Bear in mind that when the
Utility Fuses
are opened there is a supply failure to the
Rectifier
as well as to the
Bypass
and
Manual Bypass
.
In this case, the interconnection links
BR1
,
BR2
and
BR3
on the input
terminals or bus bars must remain connected. See
Fig. 3.8.3-2
.
Separate input Rectifier & Bypass (recommended)
Common input Rectifier & Bypass
Fig. 3.7.1-1 Separate input Rectifier & Bypass
Fig. 3.7.1-2 Common input Rectifier & Bypass
1 = Rectifier
2 = Inverter
3 = Automatic Bypass
4 = Manual Bypass
6 = Load
5 = Utility input
7 = Battery
