Eaton 9PXM - Page 48

34 4–20kVA Users Guide P-164000669 4–20kVA Users Guide P-164000669—Rev 09
Figure 30. From SERVICE to LINE
Rotate switch
to LINE position
2. To transition the UPS from LINE to UPS, press and hold the red button and turn the switch to UPS (see
Figure 31 ).
NOTE 1 Pressing the red button sends the UPS into Internal Bypass mode. This allows the UPS
output to synchronize with utility for safe, uninterrupted transfer.
NOTE 2 In UPS mode, the UPS resets from Internal Bypass to UPS Normal mode (online mode).
This transition may take as long as 60 seconds.
Figure 31. From LINE to UPS
Rotate switch
to UPS position
UPS
MODE
UTILITY
LOAD
BPM
UPS
FROM
UPS
TO
UPS
INPUT OUTPUT
INPUT OUTPUT
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:
No Break Transfer from Service Bypass to UPS Mode