Eaton 93E Series - 7.3.6 Transfer from Standard Normal Mode to HE Normal mode; 7.3.7 UPS and Critical Load Shutdown; 7.3.8 Charger Control

78 Eaton 93E UPS (20–30 kVA, 208/220V) Installation and Operation Manual 164000301—Rev 04
2. If not already selected, select UPS on the System Control screen.
3. On the UPS System Control screen, select the HE: ENABLE
DISABLE command, then press the
RETURN pushbutton.
The UPS transfers to Standard Normal mode.
The NORMAL status indicator is illuminated.
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To transfer the load to HE Normal mode:
1. Select the CONTROLS symbol on the main menu bar. The System Control screen is displayed.
2. If not already selected, select UPS on the System Control screen.
3. On the UPS System Control screen, select the HE: DISABLE
ENABLE command, then press the
RETURN pushbutton.
The UPS transfers to HE Normal mode if no abnormal power conditions are detected. If abnormal power
conditions are detected, the UPS will wait and transfer to HE mode when conditions are cleared.
The NORMAL status indicator is illuminated.
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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 7.3.10 Using the UPS LOAD OFF Command.
The inverter and bypass switchgear open, and the power module is turned off.
3. Perform the battery charger off procedure in paragraph 7.3.8 Charger Control.
The rectifier and battery switchgear open.
WARNING
Power is present inside the UPS cabinet after the upstream input feeder circuit breakers are opened because
of the installed internal batteries.
4. Open the UPS input circuit breaker.
5. Open the UPS input feeder circuit breakers.
6. If the UPS is dual-feed, open the bypass feeder circuit breakers.
7. If the UPS is EBC capable, open the UPS battery breaker.
8. If EBCs are installed, open all EBC battery breakers.
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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
CHARGING command, then press the
RETURN pushbutton.
To turn the battery charger off:
UPS Operating Instructions