APC AP4421A Automatic Transfer Switch (ATS), 1U, IEC 60320

Rack-Mountable Occupys only 1U of valuable rack space. Puts the power where it is needed most - in the rack near the equipment.
Information Displays Indicates the status of the AC sources powering the units, as well as indicates which source is set as the primary source and which source is currently supplying power to the load. This provides a visual depiction of the power flow from the input to the load. This allows the user to quickly glance at the power flow and status of the input sources without connecting to the unit.
Wide range of input and output connections Product family includes a variety of input and output connections to distribute 120V, 208V, or 230V power to multiple outlets. Having a variety of inputs and outputs allow users to adapt to varying power requirements. APC offers units that bring up to 17.3kW using a single branch whip.
Transfer time <10ms Industry leading transfer time to ensure seamless ride through in the event of a primary power source failure.
Dual Input Power Sources 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 alternative power source.
10 kAIC Overcurrent Protection Provides protection in the event of a significant overcurrent event.