Emerson 7400 - Manual (Page 35)

26
Series 7400 Single Phase 1+N UPS
In the 25-40kVA UPS 1 PH models the input mains / bypass cables,
UPS output cables and battery cables are connected to busbars
located behind a safety cover just below the power isolator
switches -as shown in figure 11. A terminal block is used for
connecting the control cables to the battery circuit breaker and the
external emergency stop facility.
For the 50 to 125 kVA 1PH models the power cables are connected
either directly to their respective circuit breakers or to busbars,
which are themselves, connected to the circuit breakers. See figure
12 – 14.
For 110V systems Static bypass isolator is located in auxiliary
cubicles which is usually in scope of Emerson Network Power
(India) Pvt. Ltd. Generally it is mounted in SCVS/ SVR cubicles. The
cable connection details for the same are given in figures 15 – 18.
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 19 & 20 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.
- ENSURE CORRECT PHASE ROTATION.
3. Connect the UPS bypass supply cables between the bypass
distribution panel and the UPS bypass supply terminals on
each module.
4.
Connect the output terminals of both modules together (in
parallel ).
-
ENSURE CORRECT PHASE - PHASE CONNECTION
(R - R & N - N).
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.
5. On each module, connect the battery cables between the
UPS battery terminals and its associated battery circuit
breaker -see figures 19 & 20. 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 attempt to close the Battery Circuit
Breaker before the equipment has been
commissioned
3.3.3 Cable
Connections
3.3.4 Cabling
Procedure