UPS Operating Instructions
6-20 Eaton 9E UPS (40–60 kVA, 208/220V) Installation and Operation Manual P-164000058—Rev 4 www.eaton.com/powerquality
16. If requested, enter the Level 1 password. Default password is 1111.
All rectifiers and inverters turn on. The inverters continue to ramp up to full voltage.
Once all inverters reaches full voltage, the UPS output relay closes and the static switches turns off.
Power is now supplied to the critical load in HE Normal mode. It takes approximately one minute for the
UPS to achieve HE Normal mode.
The Normal status indicator is illuminated.
17. If the UPS contains an output breaker, close the output breaker.
6.4.2 Starting the Parallel UPS in Bypass Mode
If the inverter output of the parallel UPS system is not available and the critical load needs to be energized:
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 breakers are open.
3. If the UPSs contain a bypass breaker, verify that all of the bypass breakers are open.
4. Close all Module Output Breakers (MOBs)
5. Close all UPS input feeder circuit breakers.
6. If the UPSs contain a bypass breaker, close all of the UPS Bypass input feeder circuit breakers.
7. Close all input breakers.
8. If the UPSs contain a bypass breaker, close all of the bypass breakers.
9. Close the door and secure the latch.
10. If EBCs are installed, close all battery breakers.
11. Observe the UPS control panel displays becoming active, indicating logic power.
12. Verify no alarms are active.
13. Select the CONTROLS symbol on the main menu bar. The System Control screen is displayed.
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 pushbutton.
The critical load is immediately supplied by the bypass source, in Bypass mode from all UPSs.
The BYPASS status indicator is illuminated.
16. If the UPS contains an output breaker, close the output breaker.
NOTE For each UPS, if two EBCs are installed, EBC 1 must be closed to supply DC input
to the UPS. EBC 2 may be left open, but battery runtime will be reduced.
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