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UPS with Bypass Electrical Installation
1.
Turn the switch from SERVICE to LINE (see Figure 25).
The UPS is now in LINE mode and is energized. It is often best practice to check the UPS status and configure
settings in this mode before transitioning to UPS mode. Simply check the status of the UPS through the front
LCD menu to ensure the UPS is prepared for use.
Rotate switch
to LINE position
Figure 25. From SERVICE to LINE
2. To transition the UPS from LINE to UPS, press and hold the red button and turn the switch to UPS (see
Figure 26).
NOTE 1
NOTE 2
Rotate switch
to UPS position
Figure 26. From LINE to UPS
3.
Once the switch is in UPS mode and the UPS is in Normal mode (online mode), the system is in normal
operation and prepared to provide uninterrupted power to the critical load.
After turning the load position handle to the UPS position and releasing the red button, if the Eaton 9PXM
UPS remains in Bypass mode, return the UPS to Normal mode using the following procedure for proper
operation:
NOTE 1
NOTE 2
28
Eaton 9PXM UPS (4-20 kVA) User's Guide P-164000669—Rev 05
Pressing the red button sends the UPS into Internal Bypass mode. This allows the
UPS output to synchronize with utility for safe, uninterrupted transfer.
In UPS mode, the UPS resets from Internal Bypass to UPS Normal mode (online
mode). This transition may take as long as 60 seconds.
If the UPS remains in Manual Bypass mode and incoming AC power is lost, the load
is automatically dropped. The UPS must be in Normal mode to provide battery
backup power.
If you have any questions or problems with the bypass operation, call the
at one of the telephone numbers on page 94 and ask for a UPS technical
representative.
UPS
MODE
UTILITY
LOAD
INPUT
OUTPUT
BPM
TO
FROM
UPS
UPS
INPUT
OUTPUT
UPS
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