UPS Operating Instructions
6-18 Eaton 93PM UPS (20–50 kW, 480V Four Wire – 50 kW Frame) Installation and Operation Manual P-164000540—Rev 4 www.eaton.com/powerquality
6.3 Single UPS Operation
6.3.1 Starting the UPS in Double Conversion Mode
To start the UPS system:
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. If the UPS contains a battery breaker, close the UPS battery breaker.
7. Close the door and secure the latch.
8. If IBCs are installed, close the IBC battery breakers.
9. Observe the UPS control panel display becoming active, indicating logic power.
10. Verify no alarms are active.
11. Tap the CONTROLS tab on the main menu navigation bar. The System Control screen is displayed.
12. Tap the GO ONLINE button.
13. 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 inverter switchgear closes and the static switch turns off.
Power is now supplied to the critical load in dual conversion mode. It takes approximately one minute for
the UPS to achieve the dual conversion mode.
The Normal status indicator is illuminated.
NOTE 1 If an Integrated Battery Cabinet (IBC) is installed, refer to the Eaton 93PM
Integrated Battery Cabinet Installation Manual-Large and Large High Rate, the
Eaton 93PM Universal Integrated Battery Cabinet Installation Manual-Large and
Large High Rate, or the Eaton 93PM Integrated Battery Cabinet Installation
Manual-Small listed in paragraph 1.8, for IBC battery breaker location.
NOTE 2 If a Sidecar Integrated Accessory Cabinet-Bypass (SIAC-B) is installed, refer to the
Eaton 93PM Sidecar Integrated Accessory Cabinet-Bypass Installation and
Operation (50 kW and 100 kW SIAC-B) Manual, listed in paragraph 1.8 for operating
instructions.
NOTE 3 This unit is a four-wire device. The loss of a single input phase or the loss of neutral
with unbalanced four-wire loads will be considered a complete loss of input power
and discharge the battery to provide power to the load.
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