Using The Ups-Mounted Maintenance Bypass Switch - Powerware 9155 User Manual

Using the UPS-Mounted Maintenance Bypass Switch

Table 14. UPS-Mounted Bypass Switch Positions
Switch Position
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.
from the UPS, this is the appropriate position for UPS maintenance or repair.
Powerware 9155 UPS (8–15 kVA) User's Guide
®
The UPS-mounted Maintenance Bypass switch is part of the optional
Maintenance Bypass Module or Power Distribution Module and is located
on the back of the UPS (see Figure 41).
Figure 41. Maintenance Bypass Switch (PDM Shown)
The UPS-mounted bypass switch has three positions as described in
Table 14.
NOTE
In the UPS or SERVICE position, AC input power is still
connected to the input terminals inside the UPS.
However, because BYPASS also disconnects AC input
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Description
UPS Maintenance
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