Chapter 9

Parallel 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.

SPress the button to select the 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 parallel tie cabinet to the ON position.

3.Switch the UPS breakers on the parallel tie cabinet to the OFF position.

EATON Powerware® 9155 Parallel UPS (8–15 kVA) User’s Guide S 164201592 Rev C www.powerware.com

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