User`s guide

PARALLEL BYPASS

Eaton 9355 Parallel UPS (10/15 kVA) User's Guide S 164201601 Rev B www.eaton.com/powerquality

4. If present, switch the maintenance isolation breaker (MIS) on the

wall-mounted bypass cabinet to the ON position; otherwise, switch

the UPS breakers (may be designated MOB or UPS) on the

wall-mounted bypass cabinet to the ON position.

5. Switch the bypass breaker (may be designated MBP or CBP) in the

wall-mounted bypass cabinet to the OFF position.

The UPS is now powering the load in Bypass mode.

NOTE Use the same UPS that was used to set internal bypass to return the parallel system

to Normal mode.

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 goes to Normal mode.

The UPS is now powering the load in Normal mode.