Transfer From Double Conversion Mode To Ess Mode; Transfer From Double Conversion To Bypass Mode And Shut Down The Upm; Ups And Critical Load Shutdown - Eaton 93PM Installation And Operation Manual

UPS Operating Instructions
6.3.7

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 EAA CONTROLS tab on the secondary Control menu navigation bar. The EAA CONTROLS
screen is displayed.
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.
6.3.8

Transfer from Double Conversion to Bypass Mode and Shut Down the UPM

To transfer the critical load to Bypass mode and shut down the UPMs:
1. Transfer the critical load to bypass by performing the procedure in paragraph 6.3.4.
2. Tap the CONTROLS tab on the main menu navigation bar. The System Control screen is displayed.
3. Tap the MODULES CONTROLS tab on the secondary Control menu navigation bar. The UPM Select
screen is displayed.
4. On the UPM Select screen, select UPM 1. The UPM Control Screen is displayed.
5. Tap the SHUT DOWN MODULE button.
The UPM status indicates SHUTDOWN. The power module is turned off.
Logic power remains on.
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 inverter and bypass switchgear open, and the power module is turned off.
3. Perform the battery charger off procedure in paragraph 6.3.10.
The rectifier and battery switchgear open.
Power is present inside the UPS cabinet until the upstream input feeder circuit breakers and
battery breakers are opened.
4. Open the UPS front door by lifting the latch from the bottom and turning to the right (counterclockwise)
and swing the door open.
5. Open the UPS input breaker.
6. Close the door and secure the latch.
7 . Open the UPS input feeder circuit breaker.
8. If dual feed, open the UPS bypass feeder circuit breaker.
9. If IBCs are installed, open all battery breakers.
6-20 Eaton 93PM Emergency Lighting UPS (20–40 kW, 480V Four Wire – UL 924) Installation and Operation Manual P-164000569—Rev 2
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