Automatic transfer switch system capable of governing the supply of power from more than two power sources to a load

摘要

An automatic transfer switch (ATS) system and method of operating an ATS system for governing the providing of power from first, second and third power sources to a load are disclosed. In one embodiment, the system includes a first ATS device having first and second input ports and a first output port, a second ATS device having third and fourth input ports and a second output port, and at least one communication link coupling the first and second ATS devices. The second output port of the second ATS device is coupled to the second input port of the first ATS device. Additionally, a first signal is provided from the first ATS device to the second ATS device by way of the communication link when power should be supplied from the second ATS device to the first ATS device.