Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001
Document ID: 614-01975-00
104 (133)
7.3.8 Transfer from internal maintenance bypass to the normal
mode
To transfer the load to the normal mode:
1. Close the neutral switch, slide the cover plate over the neutral
switch and tighten the screws.
2. Close the rectifier input and bypass input switches.
3. Use the control panel to command the UPS to run in the bypass
mode.
4. Check that the LCD/LED display indicates that the UPS is in the
bypass mode.
5. Close the output switch.
6. Open the maintenance bypass switch, slide the cover plate to the
left and tighten the screws.
7. Use the control panel to command the UPS to transfer to the
normal mode.
7.3.9 UPS and critical load shutdown
To perform maintenance or service on the critical load, shut down the
power to the load:
1. Turn off all the equipment that is being powered by the UPS.
2. Perform the LOAD OFF procedure as instructed in Section 7.3.12.
The output and bypass backfeed relay (if fitted) open, and the
power module is turned off.
3. In the UPS System Control screen, select the
→
command and press the push button.
The input and battery relay open.
WARNING
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. Open the bypass input switch.
6. Make sure that the maintenance bypass switch is open.
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