Eaton 93E Series - 7.3.3 Transfer from Normal to Bypass Mode; 7.3.4 Transfer from Bypass to Normal Mode; 7.3.5 Transfer from HE Normal Mode to Standard Normal Mode

Eaton 93E UPS (20–30 kVA, 208/220V) Installation and Operation Manual 164000301—Rev 04 77
11. If EBCs are installed, close the EBC 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
BYPASS command, then press the RETURN
pushbutton.
The critical load is immediately supplied by the bypass source, in Bypass mode.
The BYPASS status indicator is illuminated.
17. If an ITC with an input and output transformer is installed, close the output breaker.
The critical load is immediately supplied by the bypass source, in Bypass mode.
77..33..33 TTrraannssffeerr ffrroomm NNoorrmmaall ttoo BByyppaassss MMooddee
To transfer the critical load to Bypass mode:
CAUTION
In Bypass mode, the critical load is not protected from commercial power interruptions and 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
BYPASS command, then press the RETURN
pushbutton.
The UPS transfers to Bypass mode.
The BYPASS status indicator is illuminated. The power module remains on.
WARNING
Power is present inside the UPS cabinet.
77..33..44 TTrraannssffeerr ffrroomm BByyppaassss ttoo NNoorrmmaall MMooddee
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.
77..33..55 TTrraannssffeerr ffrroomm HHEE NNoorrmmaall MMooddee ttoo SSttaannddaarrdd NNoorrmmaall MMooddee
To transfer the load to Standard Normal mode:
1. Select the CONTROLS symbol on the main menu bar. The System Control screen is displayed.
UPS Operating Instructions