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UPS System Installation
4.5
External AC Power Wiring Installation
To install wiring:
1.
Open the front door by lifting the latch from the bottom and turning to the right (counterclockwise) and
swing the door open.
2.
Remove the screws securing the lower internal safety shield panel and remove the panel to gain access to
the input, output, and battery power wiring terminals. Retain the hardware for later use.
3.
If wiring the UPS using the top entry sidecar, proceed to Step 7; otherwise proceed to Step 4.
4.
Bottom Entry Wiring. Remove the bottom conduit plate (see Figure 4-4) from the inside bottom of the
UPS. Identify all conduit requirements and mark their location. Drill and punch all conduit holes in the
bottom conduit plate prior to mounting on the UPS. Install the conduit plate and install all conduit runs into
the plate. Pull the wiring through conduit into the wiring area.
5.
Route the input and output cables through the bottom of the cabinet to the UPS terminals. See Figure 4-4
for wiring access information, and Figure 4-7 for terminal locations.
6.
Proceed to Step 11.
7 .
If not already accomplished, remove the bottom screw securing the sidecar front panel. Lift the panel
straight up to remove from the panel hanger brackets at the top of the cabinet.
8.
Remove the screws securing the sidecar internal safety shield panel and remove the panel to gain access
to the interior of the sidecar and the UPS inter-cabinet wiring access pass-through. Retain the hardware
for later use.
9.
Top Entry Wiring. Remove the top conduit plate (see Figure 4-5) from the top of the sidecar. Identify all
conduit requirements and mark their location. Drill and punch all conduit holes in the top conduit plate
prior to mounting on the sidecar. Install the conduit plate and install all conduit runs into the plate. Pull the
wiring through the conduit into the wiring area.
10. Route the input and output cables through the top of the UPS sidecar and the UPS inter-cabinet wiring
access pass-through to the UPS terminals. See Figure 4-5 and Figure 4-6 for wiring access information,
and Figure 4-7 for terminal locations.
11. Connect phase A, B, and C rectifier input power wiring from the utility source to the rectifier input
terminals. See paragraph 3.2.2 for wiring and termination requirements.
For a detailed view of the UPS terminal blocks, see Figure 4-8.
12. Connect phase A, B, C and Neutral bypass input power wiring from the utility source to the bypass input
terminals. See paragraph 3.2.2 for wiring and termination requirements.
For a detailed view of the UPS terminal blocks, see Figure 4-8.
13. If wiring an external parallel system, proceed to Step 14; otherwise, proceed to Step 16.
External parallel system wiring length should be in accordance with Figure 3-9, to ensure
approximately equal current sharing when in Bypass mode.
14. Connect phase A, B, and C power wiring from the output terminals of each UPS to the tie cabinet.
For a detailed view of the UPS terminal blocks, see Figure 4-8.
15. Proceed to Step 17.
4-6
Eaton 93PM UPS (20–50 kW, 480V Four Wire – 50 kW Frame) Installation and Operation Manual P-164000540—Rev 4
CAUTION
www.eaton.com/powerquality
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