Electrical Wiring; Utility Input Connection - GE Digital Energy SG Series Installation Manual

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 sources if desired.
Dual Input Configuration 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.
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.
Dual Input Configuration Rectifier & Bypass
Fig. 3.7.1-1 Dual Input Configuration Rectifier & Bypass
1 = Rectifier
2 = Inverter
Modifications reserved
OPM_SGS_ISG_50K_80K_0US_V040.doc
Common Input Rectifier & Bypass
3 = Automatic Bypass
4 = Manual Bypass
Common Input Rectifier & Bypass
Fig. 3.7.1-2 Common Input Rectifier & Bypass
6 = Load
5 = Utility input
7 = Battery
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Installation Guide SG Series 50 & 80 kVA