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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 energized:
In Bypass mode, the critical load is not protected from commercial power interruptions and abnormalities.
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 (Figure 6-1).
2.
Verify that the input and output switches are open.
3.
Verify that the bypass input switch is open (Dual Input). .
4.
Verify that the bypass switch is open and the Neutral Switch is closed.
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 switch.
8.
If the UPS contains two input sources, close the bypass input switch.
9.
Close the output switch.
10. Make sure MBS cover is installed.
11. Close the door and secure the latch.
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
pushbutton.
6.3.3 Transfer from Normal to Bypass Mode
To transfer the critical load to Bypass mode:
n Bypass mode, the critical load is not protected from commercial power interruptions and
I
abnormalities.
1.
Select the CONTROLS symbol on the main menu bar. The System Control screen is displayed.
2.
If not already selected, select UPS on the System Control screen.
3.
On the UPS System Control screen, select the NORMAL
pushbutton.
The UPS transfers to Bypass mode.
The BYPASS status indicator is illuminated. The power module remains on.
59
Eaton 93E MK2 UPS (10-40kVA, 380/400/415V) Installation and Operation
CAUTION
BYPASS command, then press the RETURN
CAUTION
BYPASS command, then press the RETURN
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