Chapter 3 - Installation Procedure 7400 Series UPS User Manual
Battery Installation Single Module and One plus One Systems
6310018a.02.doc
3-18
Issue 2
(02/98)
Power Cables
Once the equipment has been finally positioned and secured, connect the
power cables as described in the following procedure.
Study the connection diagrams in figures 3-8 to 3-11 and positively
identify the diagram relevant to your equipment before commencing
cabling.
1. Verify that the UPS equipment is totally isolated from its external
power source and all the UPS isolators are open.
2. On each module, connect the input supply cables between the mains
distribution panel and the UPS input mains terminals. Check that
links are fitted between input mains bus bars and bypass supply bus
bars (U1 - U3; V1 - V3; W1 - W3).
ENSURE CORRECT PHASE ROTATION.
3. If a "split-bypass" configuration is used, connect the UPS bypass
supply cables between the bypass distribution panel and the UPS
bypass supply terminals on each module. Ensure any links fitted
between input and bypass bus bars are removed.
ENSURE CORRECT PHASE ROTATION.
4. On a Single module connect the UPS output cables between the UPS
and the load distribution panel.
5. On modules in a one plus one system connect the output terminals of
both modules together (in parallel).
ENSURE CORRECT PHASE-PHASE CONNECTION (U2-U2, V2-
V2, W2-W2, N2-N2).
Then connect the UPS output cables between the paralleled UPS output
terminals and load distribution panel.
Note: If the UPS is to be commissioned before the load equipment is
ready to receive power then SAFELY isolate the load cables.
6. On each module, connect the battery cables between the UPS battery
terminals and its associated battery circuit breaker see figures 3-13
to 3-17. As a safety precaution remove the battery fuse in the module
until the arrival of the commissioning engineer.
OBSERVE THE BATTERY CABLE POLARITY.
WARNING
Do not close the battery circuit breaker before the equipment has been commissioned
7. Connect the safety earth and any necessary bonding earth cables to
the copper earth busbar located on the floor of the equipment below
the power connections.
Note:- The earthing and neutral bonding arrangement must be in
accordance with local and national codes of practice.
Control Cables
8. Connect the battery circuit breaker control cables between the UPS
auxiliary terminal block and battery circuit breaker controller board
as shown in figures 3-13 to 3-17.
3.4.5 Cabling procedure
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