UPS Operating Instructions
Eaton 9E UPS (40–60 kVA, 208/220V) Installation and Operation Manual P-164000058—Rev 4 www.eaton.com/powerquality 6-23
4. On the UPS System Control screen, select the NORMAL UPS OFF command, then press the
RETURN pushbutton.
The output and bypass backfeed relays open, and the power module is turned off on the UPS being shut
down.
Logic power remains on.
Power is present inside the UPS cabinet until the upstream input feeder circuit breaker is opened.
5. Open the UPS input and, if installed, the bypass feeder circuit breakers for the UPS being shut down.
6. If EBCs are installed, open all battery breakers
The UPS is now completely shut down.
6.4.10 Single UPS Restart
To restart a single UPS from a shutdown state:
1. Close the MOB for the UPS being restarted.
2. Close the UPS input and, if installed, bypass feeder circuit breakers for the UPS being restarted.
3. Close the input breaker.
4. If the UPS contains a bypass breaker, close the bypass breaker.
5. If EBCs are installed, close the battery breakers.
6. On the UPS being restarted, observe the UPS control panel display becoming active, indicating logic
power.
7. Verify no alarms are active on the UPS being restarted.
8. On the UPS being restarted, select the CONTROLS symbol on the main menu bar. The System Control
screen is displayed.
9. If not already selected, select UPS on the System Control screen.
10. On the UPS System Control screen, select the UPS OFF NORMAL command, then press the
RETURN pushbutton.
11. If requested, enter the Level 1 password. Default password is 1111.
The rectifier and inverter turn on. The inverter continues to ramp up to full voltage.
Once the inverter reaches full voltage, the UPS output relay closes and the static switch turns off. Power is
now supplied to the critical load in HE Normal mode along with the other UPSs online. It takes
approximately one minute for the UPS to achieve HE Normal mode.
The Normal status indicator is illuminated.
6.4.11 UPS and Critical Load Shutdown
To perform maintenance or service on the critical load, shut down power to the load:
1. Turn off all equipment that is being powered by the UPS parallel system.
2. Transfer the UPSs to bypass by performing the procedure in paragraph 6.4.3.
3. Perform the LOAD OFF procedure in paragraph 6.4.14.
The output and bypass backfeed relays open, and the power module is turned off.
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