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3.3 Wiring Installation
1. Switch off utility power to the distribution point where the UPS will be connected.
Be absolutely sure that there are no hazardous voltages present. Use appropriate
procedures to assure safety.
2. Remove as many panels as needed for adequate access for wiring the cabinet.
Open the front door of the Transformer Cabinet.
3. Connect wires from the "
TO UPS INPUT
" terminal block to the input terminals in
the UPS. (Refer to the UPS manual). The wire must be in compliance with
Table
6
and the terminals must be torqued in compliance with
Table 7.
Make sure that
phase A connects to phase A and so on.
4. Connect wires from the "
FROM UPS OUTPUT
" terminal block to the output
terminals in the UPS. (Refer to the UPS manual). The wire must be in compliance
with
Table 6
and the terminals must be torqued in compliance with
Table 7
. Make
sure that phase A connects to phase A and so on.
5. Connect wires from the "
OUTPUT TO LOAD
" terminal block to the load. The load
may be an external distribution panel, etc. If neutral is not needed by the load,
then it does not need to be supplied. The wire must be in compliance with
Table 6
and the terminals must be torqued in compliance with
Table 7
. Make sure that
phase A connects to phase A and so on.
6. Verify that the input power source is not powered. Connect wires from the
"
UTILITY INPUT
" terminal block to the input source power from the building
distribution. The wire must be in compliance with
Table 6
and the terminals must
be torqued in compliance with
Table 7
. Make sure that phase A connects to
phase A and so on. The source needs to have A-B-C phase sequence. If not,
exchange two of the phase connections to correct this.
7.
MBS Arrangement Only
: A set of control connections must be installed from the
"
CUSTOMER LOW VOLTAGE CONNECTION TERMINAL BLOCK
" to the
Remote Commands and Alarm Connections in the front of the UPS cabinet.
These control wires must be physically separated from any power wires. The
length of the control wires is limited to 30 feet or 10 meters. See Section
3.4
Control Connections (MBS Arrangement Only)
for wiring details.
8. Check all work. Replace the panels that were removed for access.
