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MegaFlex 1000 to 1600
UPS Installation Guide / REV-A
4.8
Electrical wiring
Warning!
UPS installation and connection must be performed only by an ABB Service Technician!
Refer to the “Safety prescriptions - Installation” described on Chapter 1.
It is the responsibility of the installation technician to ensure that all local and national electric
codes are adhered to.
4.8.1
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 an ABB Service Technician.
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 Utility Configuration Rectifier & Bypass
Fig. 4.8.1-1 Dual Input Utility Rectifier & Bypass
The Bypass and Rectifier use different
power sources (
CB1
and
CB2
inputs).
In this case, when the Rectifier-input
breakers are opened, the Automatic
Bypass is supplied by the other
connection.
Note!
Always verify that the received UPS is as per the configuration ordered.
While installing UPS dual source, the interconnection links BR1, BR2 and BR3 must be removed.
See Fig. 4.9.2-3 & Fig. 4.9.4-3.
Common Input Utility Rectifier & Bypass
Fig. 4.8.1-2 Common Input Utility Rectifier & Bypass
The
same power source
is to be used for
both Bypass supply and Rectifier input
(input
CB3
).
Bear in mind that when the Utility breakers
are opened there is a supply failure to the
Rectifier as well as to the Automatic
Bypass.
Note!
In this case, the interconnection links BR1, BR2 and BR3 on the input bus bars must remain
connected.
