Eaton 93E MK2 - Starting the Parallel UPS in Bypass Mode

6.4.2 Starting the Parallel UPS in Bypass Mode
If the inverter output of the parallel UPS is not available and the critical load needs to be energized:
CAUT
ION
In
Bypass mode, the critical load is not protected from commercial power
interruptions and
abnormalities.
1.
Unfasten the front door by lifting the latch from the bottom and turning to the right
(counterclockwise) and swing the door open (Figure 6-1).
2. Verify that all input breaker are open.
3. Verify that the Maintenance bypass switches are open.
4. Close all Module Output Breakers (MOBs).
5. Close all UPS input feeder circuit break ers.
6. If the UPSs are wired for dual input, close all of the UPS Bypass input feeder circuit break ers.
7. Close all input break ers.
8. If the UPSs are wired for dual input, close all of the bypass input switc hes.
9. Make sure MBS cover is inst alled.
10. Close the door and secure the latc h.
11. Close the external battery break ers.
11. Observe the UPS control panel display becoming active, indicating logic po w er .
12. Verify no alarms are activ e.
13. Select the CONTROLS symbol on the main menu bar. The System Control screen is displa y ed.
14. If not already selected, select UPS on the System Control screen.
15. On the UPS System Control screen, select the LOAD OFF BYPASS command, then press the
RETURN
pushbut ton.
The critical load is immediately supplied by the bypass source, in Bypass mode from
all
UPSs. The BYPASS status indicator is illuminated.
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Eaton 93E MK2 UPS (10-40kVA, 380/400/415V) Installation and Operation