Wiring Connection - ABB MegaFlex 1000 UL S1 Installation Manual

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4.9 Wiring connection

Note!
UPS installation and connection must be performed only by an ABB Service Technician!
Refer to the "Safety prescriptions - Installation" described on Chapter 1.
In case of UPS equipped with options or customized parts not covered by this manual, please
consult the appropriate technical documentation before proceeding with electrical connections.
Carefully read the following recommendations before proceeding:
· Ensure that the AC and DC external isolators are Off and prevent their inadvertent operation.
· Do not close any external isolators prior to the commissioning of the equipment.
· The input/output cables must be connected in clockwise phase rotation for both Bypass and Rectifier Input
Bars if separate, taking care to avoid risk of short circuit between different poles.
· The grounding connection of the electrical system must be in accordance with local regulations.
· In case of additional cabinets containing Batteries, Input/Output Transformers, etc., their ground terminals
must be connected to the UPS main ground terminal.
· Once the power cables have been connected, re-install the internal safety shields and close the cabinets by re-
installing all external panels.
MegaFlex 1000 to 1600 Access to the bus bars for the cable connections
!
Please remove
the plates (B and C) before
drilling any wholes
Fig. 4.9-1 MegaFlex 1000 to 1600 - Access to connection bus bars
Note!
Drill the cover plate "B and/or C" appropriate holes for cable conduits entry. See Fig. 4.9-2.
The holes must be drilled with the cover plate "B and/or C" removed from the UPS to avoid metal
dust falling in the connection bars area.
Warning!
Panel "A, B and C" should never be removed or replaced with power applied to the UPS.
These panels are in close proximity to 480V live buss bars.
Always disconnect the Rectifier, Bypass, Load and Battery sources from the UPS before removing
or replacing these panels. If not serious injury or death could occur!
Top entry cables Utility input,
Load output and Battery
Bottom entry cables
Utility input, Load output
and Battery
C
MegaFlex 1000 to 1600
B
A
To access Input, Output and Battery
connections proceed as follows:
Remove the front protection panel "A".
-
Top cable entry: remove the plate "B".
-
Bottom cable entry: remove the plate
-
"C".
UPS Installation Guide / REV-A
Note!
For UPS correct operation, the
input mains phase
must be clock-wise.
rotation