Eaton 93PM UPS - Transfer from Double Conversion to Bypass Mode

UPS Operating Instructions
6-20 Eaton 93PM UPS (20–50 kW, 480V Four Wire – 50 kW Frame) Installation and Operation Manual P-164000540—Rev 4 www.eaton.com/powerquality
12. Tap the START MODULE button.
The UPM 1 rectifier and inverter turn on. When the inverter reaches full voltage, the UPS is ready to
transfer to the Double Conversion mode and supply the critical load.
13. Repeat Steps 9 through 12 selecting UPM 2 to start UPM 2.
The UPM 2 rectifier and inverter turn on. When the inverter reaches full voltage, the UPS is ready to
transfer to the Double Conversion mode and supply the critical load.
6.3.4 Starting a Single UPM
To Start a single UPM:
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 breaker 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.
6. Close the door and secure the latch.
7. Observe the UPS control panel becoming active, indicating logic power.
8. Verify no alarms are active.
9. Tap the CONTROLS tab on the main menu navigation bar. The System Control screen is displayed.
10. Tap the MODULES CONTROLS tab on the secondary Control menu navigation bar. The UPM Select
screen is displayed.
11. On the UPM Select screen, select the UPM to start. The UPM Control Screen is displayed.
12. Tap the START MODULE button.
The UPM rectifier and inverter turn on. When the inverter reaches full voltage, the UPS is ready to transfer
to the Double Conversion mode and supply the critical load.
6.3.5 Transfer from Double Conversion to Bypass Mode
To transfer the critical load to Bypass mode:
CAUTION
In Bypass mode, the critical load is not protected from commercial power interruptions and
abnormalities.
1. Tap the CONTROLS tab on the main menu navigation bar. The System Control screen is displayed.
2. Tap the GO TO BYPASS button.
The UPS transfers to Bypass mode. and the critical load is immediately supplied by the bypass source. If
the bypass source is not available, the power module remains on and an alarm sounds.
The BYPASS status indicator is illuminated. The power module remains on.
WARNING
Power is present inside the UPS cabinet.