Eaton 9355 - 7.2.4 UPS Maintenance Bypass Startup; 7.2.5 Wall-Mounted Maintenance Bypass Startup; 7.3 Single UPS Shutdown

94 Eaton 9355 UPS (10/15 kVA) User’s Guide 164201594—Rev H0
service engineer to apply power to the UPS input and verify its operation while the load is powered through
bypass.
Figure 73. Maintenance Bypass Switch
The UPS-mounted bypass switch has three positions as described in Table 13.
NOTE In the UPS or SERVICE position, AC input power is still connected to the input terminals
inside the UPS.
Table 13. UPS-Mounted Bypass Switch Positions
Switch Position Description
UPS Connects the UPS output to the load.
SERVICE Connects the load directly to AC input power and disconnects UPS output. AC input power is still connected
to the UPS input.
BYPASS Like the SERVICE position, BYPASS connects the load directly to AC input power and disconnects UPS
output. However, because BYPASS also disconnects AC input from the UPS, this is the appropriate position
for UPS maintenance or repair.
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1. Remove the cables and screws for any ConnectUPS Web/SNMP or PXGX card and then remove the x-slot
card.
UPS Operating Instructions