Single Ups Operation; Starting The Ups In Standard Normal Mode (Default Mode); Starting The Ups In Bypass Mode - Eaton 9E Installation And Operation Manual

6.3

Single UPS Operation

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. If the UPS contains input and output switches, verify that the input and output switches are open.
3. If the UPS contains a bypass input switch (80-120kVA), verify the bypass input switch is open.
4. If the UPS contains a bypass switch (80-120kVA), verify that the bypass switch is open and the Neutral
Switch is closed.
5. Close the UPS input feeder circuit breaker.
6. If the UPS is fed from two input sources, close the UPS Bypass input feeder circuit breaker.
7 . If the UPS contains an input switch, close the input switch.
8. If the UPS contains a bypass input switch, close the bypass input switch.
9. If the UPS contains an output switch, close the output switch.
10. Close the door and secure the latch.
11. Close the external battery breakers.
12. Observe the UPS control panel display becoming active, indicating logic power.
13. Verify no alarms are active.
14. Select the CONTROLS symbol on the main menu bar. The System Control screen is displayed.
15. If not already selected, select UPS on the System Control screen.
16. On the UPS System Control screen, select the LOAD OFF
RETURN pushbutton.
17 . 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 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.
18. If the UPS contains an output switch, close the output switch.

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:
In Bypass mode, the critical load is not protected from commercial power interruptions and
abnormalities.
NOTE
• Note switch operation nomenclature: Open = O = Off, Closed = I = On.
• Refer to the External Battery Cabinet Installation Manual for EBC battery breaker
location.
NORMAL command, then press the
CAUTION
Eaton 9E UPS (80-200 kVA, 380/400/415V) Installation and Operation Manual
UPS Operating Instructions
6-11