Eaton FERRUPS FE/QFE UPS (500 VA–18 kVA) Installation Guide S 164201403 Rev B
www.eaton.com/powerquality
67
Chapter 8 Phase Check
After all hardwired connections are complete (including external battery
cabinets, if applicable), complete the phase check using the following
steps. You will need an AC voltmeter for the phase check.
C A U T I O N
Before operating the bypass switch, use the following procedure to check the wiring for
correct installation. To prevent damage to the load, turn off the main circuit breaker in the
load service panel or verify that the load cannot receive power from the UPS.
1. Confirm that an electrician has completed and tested the
connection to the proper power source.
2. Verify that the bypass switch is in the OFF position.
3. At the UPS AC input service panel, turn on the input power to the
UPS and the bypass switch.
4. Turn on the AC disconnect switch.
The AC LINE indicator illuminates.
NOTE The AC LINE indicator does not illuminate for FE 500 VA–3.1 kVA models with serial
numbers 25000 and greater until the UPS ON/OFF switch is turned to the ON position.
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