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