UPS Operating Instructions
6-26 Eaton 93PM UPS (20–50 kW, 480V Four Wire – 50 kW Frame) Installation and Operation Manual P-164000540—Rev 4 www.eaton.com/powerquality
13. Tap the GO ONLINE button.
14. 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, all UPS inverter switchgear close and the static switches turn off.
Power is now supplied to the critical load in dual conversion mode from all UPSs. It takes approximately
one minute for the UPSs to achieve the dual conversion mode.
The Normal status indicator is illuminated.
6.4.2 Starting the Parallel System in Bypass Mode
If the inverter output of the UPS 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. Close all Module Output Breakers (MOBs).
2. Open each UPS front door by lifting the latch from the bottom and turning to the right (counterclockwise)
and swing the door open.
3. Verify that all UPS input breakers are open.
4. Close all UPS input feeder circuit breakers.
5. If dual feed, close all UPS bypass feeder circuit breakers.
6. Close all UPS input breakers.
7. If the UPS contains a battery breaker, close all UPS battery breakers.
8. Close the door and secure the latch.
9. If IBCs are installed, close the IBC battery breakers.
10. Observe the UPS control panel display becoming active, indicating logic power.
11. Verify no alarms are active.
12. Tap the CONTROLS tab on the main menu navigation bar. The System Control screen is displayed.
13. Tap the GO TO BYPASS button.
The critical load is immediately supplied by the bypass source, in Bypass mode from all UPSs.
The BYPASS status indicator is illuminated.
6.4.3 Starting the Parallel System UPMs
To start the power modules without transferring the critical load to Double Conversion mode:
1. Open the UPS front door by lifting the latch from the bottom and turning to the right (counterclockwise)
and swing the door open.
2. Verify that the UPS input breakers is open.
3. Close the UPS input feeder circuit breaker.
4. If dual feed, close the UPS bypass feeder circuit breaker.
5. Close the UPS input breaker.
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