Eaton 93E, Operation Manual

Page: 71 / 92

UPS Operating Instructions
Eaton 93E UPS (300/400 kVA, 380/400/415V) Installation and Operation Manual 6-13
To transfer the load to HE mode:
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 HE: DISABLE ENABLE command, then press the
RETURN pushbutton.
After battery is fully charged , the UPS transfers to HE mode if no abnormal power conditions are detected.
If abnormal power conditions are detected, the UPS will wait and transfer to HE mode when conditions are
cleared.
The NORMAL status indicator is illuminated.
6.3.4 Transfer from Bypass to Normal Mode
To transfer the critical load to Normal mode:
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 BYPASS NORMAL command, then press the RETURN
pushbutton.
The UPS transfers to Normal mode. If the power module is not available, the system remains on bypass
and an alarm sounds.
The NORMAL status indicator is illuminated.
6.3.6 Transfer from HE Mode to Standard Normal Mode
To transfer the load to Standard Normal mode:
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 HE: ENABLE DISABLE command, then press the
RETURN pushbutton.
The UPS transfers to Standard Normal mode.
The NORMAL status indicator is illuminated.
6.3.5 Transfer from Standard Normal Mode to HE mode
6.3.7 Transfer from Normal Mode to external Maintenance Bypass
To transfer the load to maintenance bypass:
1. Transfers the UPS to Bypass mode.
2. Verify that the LCD/LED display indicates the UPS is in Bypass mode.
3. Close the Maintenance Bypass switch.
4. Open the Bypass input breaker, Rectifier input breaker and Output breaker separately (see Figure 6-8).
WARNING
Power is present inside the UPS cabinet.