20 Chapter 3 Electrical Installation
APM 300 Integrated UPS Single Module And Parallel System User Manual
4. Use a multimeter to measure and confirm that the connections are correct and no inter-phase short circuit
exists.
5. Bind the parallel power cables.
6. Replace the cover and left side panel of the main power cabinet removed in step 1 and the cover at the front
of the switch cabinet removed in the procedures in
2.5.2 Mechanical Connection Between Cabinets
Main power cabinet
Switch cabinet
Main power cabinet
Run the parallel power cables from here
Cabling
route
A
Switch cabinet
Run the parallel power cables from here
mA-1 mB-1 mC-1 mN-1
oA-1 oB-1 oC-1 oN-1
mA-2 mB-2 mC-2 mN-2
oA-2 oB-2 oC-2 oN-2
A Amplified view (connection terminals in main power cabinet)
Figure 3-1
Connecting parallel power cables
3.1.9
Connecting External Power Cables
Important
The operations described in this section must be performed by authorised personnel. If you have any questions, please
contact the local customer service center of Emerson immediately.
Once the UPS has been finally positioned and secured, connect the power cables as described in the following
procedures.
1. Verify that the external input switch and all internal power switches of the UPS are open. Post warning signs
on these switches to prevent inadvertent operation.
2. Open the back doors of the main power cabinet and switch cabinet to reveal the connection terminals of
the power cables, including the rectifier input terminals, bypass input terminals, output terminals, battery
input terminals and PE terminals, as shown in Figure 3-2.
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