Transfer From Double Conversion Mode To Ess Mode; Ups And Critical Load Shutdown; Charger Control - Eaton 93PM Installation And Operation Manual

UPS Operating Instructions
6.3.6

Transfer from Double Conversion Mode to ESS Mode

To transfer the load to HE Normal mode:
1. Tap the CONTROLS tab on the main menu navigation bar. The Control screen is displayed.
2. Tap the SEREVICE CONTROLS tab on the Control menu navigation bar.
3. Tap the ENABLE ESS button.
The UPS transfers to ESS mode if no abnormal power conditions are detected. If abnormal power
conditions are detected, the UPS will wait and transfer to ESS mode when conditions are cleared.
The NORMAL status indicator is illuminated.
6.3.7

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 Shutdown procedure in paragraph 6.3.10.
The inverter and bypass switchgear open, and the power module is turned off.
3. Perform the battery charger off procedure in paragraph 6.3.8.
The rectifier and battery switchgear open.
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 feeder circuit breaker.
5. If dual feed, open the UPS bypass feeder circuit breaker.
6. If IBCs are installed, open all battery breakers.
6.3.8

Charger Control

To turn the battery charger on:
1. Tap the CONTROLS tab on the main menu navigation bar. The Control screen is displayed.
2. Tap the TURN ON CHARGER button.
To turn the battery charger off:
1. Tap the CONTROLS tab on the main menu navigation bar. The Control screen is displayed.
2. Tap the TURN OFF CHARGER button.
6-12 Eaton 93PM UPS (60–100 kW, 480V) Installation and Operation Manual P-164000227—Rev 2
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