OPERATION
EATON Powerware
®
9355 UPS (10/15 kVA) User’s Guide S 164201594 Rev C www.powerware.com
76
UPS Maintenance Bypass Startup
To start the UPS in maintenance bypass:
1. Verify that the maintenance bypass switch is in the BYPASS
position(seeFigure47onpage81).
2. If an optional isolation transformer is installed, switch the input
circuitbreakertotheONposition(seeFigure12onpage21).
3. Switch on utility power where the UPS is connected.
The load is now powered by utility power.
4. To transfer the load to the UPS, see “Using the UPS Maintenance
Bypass Switch” on page 81.
Wall-Mounted Maintenance Bypass Startup
To start the UPS in maintenance bypass (wall -mounted operation):
1. Verify that the bypass breaker is in the OFF position (see Figure 20
on page 32).
2. Switch on utility power where the wall-mounted bypass cabinet is
connected.
3. Switch the bypass breaker to the ON position.
The load is now powered by utility power.
4. To transfer the load to the UPS, see “Using the Wall -Mounted
Bypass Cabinet” on page 83.
