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2.
Switch the bypass breaker on the parallel tie cabinet to the ON position.
3.
Switch the UPS breakers on the parallel tie cabinet to the OFF position.
To return to Normal Mode from maintenance bypass:
1.
Verify that all UPS breakers on the parallel tie cabinet are in the OFF position.
2.
Switch on utility power where the UPSs are connected.
In a parallel capacity system (2+0 or 2+1), apply utility to the minimum number of UPSs required for
capacity.
NOTE
Use the same UPS that was used to set internal bypass to return the parallel system to
Normal mode.
3.
Set the system to internal Bypass mode:
•
Using the
button on the front panel display, scroll to the Control menu option and press the
button.
•
Press the
button to select the Go to Bypass Mode option.
The
and
mode.
4.
Switch all UPS breakers on the parallel tie cabinet to the ON position.
5.
Switch the bypass breaker on the parallel tie cabinet to the OFF position.
6.
On the same UPS front panel, set the UPS to Normal mode:
•
Press the
button to select the Go to Normal Mode option.
•
Each UPS should go to Normal mode..
indicators illuminate, indicating the UPS system is operating in Bypass
Eaton 9155 Parallel UPS (8–15 kVA) User's Guide 164201592—Rev E0
UPS Operating Instructions
51
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