3.7 ELECTRICAL WIRING
WARNING !
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
NOTE !
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
dual input
(option) sources if desired.
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. 3.8.3-3
.
Dual Input Configuration Rectifier & Bypass (option)
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. 3.8.3-3
.
Dual Input Configuration Rectifier & Bypass (option)
Common Input Rectifier & Bypass
Fig. 3.7.1-1 Dual Input Configuration Rectifier & Bypass (option)
Fig. 3.7.1-2 Common Input Rectifier & Bypass
1 = Rectifier
2 = Inverter
3 = Automatic Bypass
4 = Manual Bypass Q2 (option)
6 = Load
5 = Utility input
7 = Battery
Modifications reserved
Page 17/40
OPM_SGS_ISG_M22_M30_2US_V010.doc
Installation Guide
SG Series 225 & 300 UL S2
