Eaton 93PM 150 kW SIAC-B Three-Wire, Installation And Operation Manual, Page: 96 / 106

SIAC-B Operating Instructions
6-4 Eaton 93PM Sidecar Integrated Accessory Cabinet-Bypass (150 kW and 200 kW SIAC-B) Installation and Operation Manual P-164000387—Rev 7 www.eaton.com/powerquality
6.1.3 Transferring the UPS to Maintenance Bypass using an SIAC-B
CAUTION
Only trained personnel familiar with the operation of this equipment should transfer loads. Failure
to follow this transfer sequence may cause loss of power to loads.
CAUTION
In Bypass mode, the critical load is not protected from commercial power interruptions and
abnormalities.
To transfer the load to maintenance bypass:
1. Remove the screw securing the bottom of the SIAC-B front panel. Lift the panel straight up to remove it
from the panel hanger bracket at the top of the cabinet. Retain screw for later use.
2. Transfer the UPS from normal mode to bypass mode. Refer to the applicable Eaton 93PM UPS Installation
and Operation manual, listed in paragraph 1.7, for UPS operating procedures.
CAUTION
Failure to close the MBP before opening the MIS will result in the loss of power to the critical load.
3. Close the MBP.
4. Slide the bypass interlock plate to the left (see Figure 6-1 or Figure 6-2).
5. Open the MIS.
The critical load is supplied by the maintenance bypass source.
6. Shut down the UPS. Refer to the applicable Eaton 93PM UPS Installation and Operation manual, listed in
paragraph 1.7, for UPS operating procedures.
WARNING
The BIB and RIB (if installed) or the bypass feeder breaker must be opened to electrically isolate
the UPS.
7. If installed, open the BIB.
8. If installed, open the RIB.
9. Reinstall the SIAC-B front panel and secure with retained screw.