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6.3.9 UPS and Critical Load Shutdown
To perform maintenance or service on the critical load, shut down power to the load:
1.
Turn off all equipment that is being powered by the UPS.
2.
Perform the LOAD OFF procedure in paragraph 6.3.12.
The output and bypass backfeed relay (if fitted) open, and the power module is turned off.
3.
Perform the battery charger off procedure in paragraph 6.3.10.
The input and battery relay open.
Power is present inside the UPS cabinet after the upstream input feeder circuit breakers are
opened because of the installed external battery cabinet.
4.
Open the UPS Input switch.
5.
If the UPSs are wired for dual input, open the Bypass input switch.
6.
Open the Maintenance Bypass switch.
7 .
Open the UPS input and bypass feeder circuit breakers.
8.
Open all external battery breakers.
6.3.10 Charger Control
To turn the battery charger on:
1.
Select the CONTROLS symbol on the main menu bar. The System Control screen is displayed.
2.
Select Battery on the System Control screen.
3.
On the Battery System Control screen, select the RESTING
RETURN pushbutton.
To turn the battery charger off:
1.
Select the CONTROLS symbol on the main menu bar. The System Control screen is displayed.
2.
Select Battery on the System Control screen.
3.
On the Battery System Control screen, select the CHARGING
RETURN pushbutton.
WARNING
CHARGING command, then press the
Eaton 93E UPS (15-80 kVA, 380/400/415V) Installation and Operation Manual
UPS Operating Instructions
RESTING command, then press the
6-15
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