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UPS System Installation
4.8
Installing a REPO Switch
A latching-type Remote Emergency Power-off (REPO) switch can be used in an emergency to shut down the
UPS and remove power to the critical load from a location away from where the UPS is installed. Figure 4-24
shows a REPO switch.
NOTE 1
NOTE 2
NOTE 3
NOTE 4
NOTE 5
NOTE 6
To Install a REPO switch:
1.
Verify the UPS system is turned off and all power sources are removed. See Chapter 6, "UPS Operating
Instructions, " for shutdown instructions.
2.
Securely mount the REPO switch. Recommended locations include operator's consoles or near exit
doors. See Figure 3-8 for enclosure dimensions and wiring knockouts.
3.
If not already opened, open the front door by lifting the latch from the bottom and turning to the right
(counterclockwise) and swing the door open.
4.
If wiring the REPO terminals from the bottom of the UPS, proceed to Step 9; otherwise, proceed to
Step 5.
5.
Remove the top interface entry conduit landing plate to drill or punch holes (see Figure 4-4).
6.
Reinstall the interface entry plate and install the conduit.
7 .
Route the REPO wiring through the top interface entry conduit landing plate to the REPO terminals. See
Figure 4-4 for wiring access information, and Figure 4-9 and Figure 4-10 for UPS interface terminal
locations.
8.
Proceed to Step 14.
9.
Remove the bottom interface entry conduit landing plate to drill or punch holes (see Figure 4-11).
10. Reinstall the interface entry plate and install the conduit.
4-30
Eaton 93PM UPS (20–50 kW, 480V Four Wire – 50 kW Frame) Installation and Operation Manual P-164000540—Rev 4
Before installing a REPO switch, verify that the UPS was installed according to the
instructions in paragraphs 4.2 through 4.6.
When installing the REPO switch, you must install conduit between the device and
the UPS cabinet for wiring the switch.
The REPO switch must be a Normally-open or Normally-closed latching-type switch
not tied into any other circuits.
This procedure is intended for installing the Eaton-supplied REPO switch. If
installing another manufacturer's switch, use this procedure, and Figure 4-26 and
Figure 4-27 as a guide.
The REPO switch wiring must be in accordance with NEC Article 725 Class 2
requirements.
Disconnect terminal block plugs from terminal blocks to wire plugs.
www.eaton.com/powerquality
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