19 inch Rack-Mountable Supplies redundant AC power to connected equipment. Two AC lines power the unit and if the primary AC power fails, the unit will automatically switch to the alternate power source. Quick Transfer Rate Transfer rate is within the industry standard and within the time power supplies will typically drop loads. The transfer of one power source to another is seamless to the connected equipment avoiding disruption of equipment performance. Wrap Around System Bypass (3) Breaker maintenance bypass panel to isolate the UPS from the critical load