Eaton Powerware 9355 - Normal Mode Startup

UPS MAINTENANCE
EATON Powerware
®
9355 UPS (20/30 kVA) Installation and Operation Manual S 164201626 Rev B www.powerware.com
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Parallel UPS Bypass
To switch the parallel UPS to maintenance bypass from Normal mode:
1. From any UPS, set the system to internal Bypass mode:
S Using the button on the front panel display, scroll to the Control menu option
and press the
button.
S Press the button to select t he Go to Bypass Mode option.
The
and indicators illuminate, indicating the UPS system is operating
in Bypass mode.
2. Switch the bypass breaker on the Tie Cabinet to the ON position.
3. Switch the UPS breakers on the Tie Cabinet to the OFF position.
To return the parallel UPS to Normal mode from maintenance bypass:
1. Verify that all UPS breakers on the Tie Cabinet are in the OFF position.
2. Switch on utility power where the UPSs are connected.
In a parallel capacity system (N+0 or N+1), apply utility to the minimum number
of UPSs required for capacity.
NOTE Use the same UPS that was used to set internal bypass to return the parallel system to Normal
mode.
3. Set the system to internal Bypass mode:
S Using the button on the front panel display, scroll to the Control menu option
and press the
button.
S Press the button to select t he Go to Bypass Mode option.
The
and indicators illuminate, indicating the UPS system is operating
in Bypass mode.
4. Switch all UPS breakers on the Tie Cabinet to the ON position.
5. Switch the bypass breaker on the Tie Cabinet to the OFF position.
6. On the same UPS front panel, set the UPS to Normal mode:
S Press the button to select the Go to Normal Mode option.
S Each UPS should go to Normal mode.