Eaton 9EHD Series, User'S Installation And Operation Manual

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6 3 Single uPS operation
NOTE
• Note switch operation nomenclature: Open = O = Off, Closed = I = On.
• Refer to the External Battery Cabinet Installation Manual for EBC battery breaker
location.
6 3 1
Starting the uPS in Standard normal mode (default mode)
To start the UPS system:
1. Unfasten the front door by lifting the latch from the bottom and turning to the right (counterclockwise) and
swing the door open (see Figure 6-1).
2. Verify that the input and output breakers are open.
3. If the UPS contains bypass input breaker, verify the bypass input breaker is open .
4. If the UPS contains maintenance bypass switch, verify that the maintenance bypass switch is open or the
3-position maintenance bypass switch is on ‘UPS’ mode.
5. Close the UPS input feeder circuit breaker.
6. If the UPSs are wired for dual input, close the UPS Bypass input feeder circuit breaker.
7. Close the input breaker.
8. If the UPS contains bypass input breaker, close the bypass input breaker.
9. Close the output breaker.
10. Make sure MBS cover is installed.
11. Close the door and secure the latch.
12. Close the external battery breakers.
13. Observe the UPS control panel display becoming active, indicating logic power.
14. Verify no alarms are active.
15. Select the CONTROLS symbol on the main menu bar. The System Control screen is displayed.
16. If not already selected, select UPS on the System Control screen.
17. On the UPS System Control screen, select the LOAD OFF NORMAL command, then press the
RETURN pushbutton.
18. If requested, enter the Level 1 password. Default password is 1111.
After entering password, UPS will transfer to bypass first and the Bypass LED will illuminate.
The rectifier and inverter turn on. The inverter continues to ramp up to full voltage.
Once the inverter reaches full voltage, the UPS output contactor closes and the static switch turns off.
Power is now supplied to the critical load in Standard Normal mode. It takes approximately one minute for
the UPS to achieve Standard Normal mode.
The Normal status indicator is illuminated.
6 3 2 Starting the uPS in Bypass mode
If the inverter output of the UPS is not available and the critical load needs to be energised:
CAUTION
In Bypass mode, the critical load is not protected from commercial power interruptions and abnormalities.
Eaton 9EHD UPS (20-40 kVA, 380/400/415V) Installation and Operation Manual 59