Patent ID: 7868484

Claim:
A multi-coil automatic transfer switch (ATS) adapted for automatically switching an appropriately rated component to render the ATS operational over a predetermined voltage range, the ATS comprising: an input configured to be coupled to a power source including a voltage within the predetermined voltage range; an output; a low voltage contactor including: a normally open low voltage main contact coupled to the input and the output, and a low voltage coil coupled to ground and magnetically linked with the normally open low voltage main contact; a high voltage contactor coupled in parallel with the low voltage contactor, the high voltage contactor including: a normally open high voltage main contact coupled to the input and the output, and a high voltage coil coupled to ground and magnetically linked with the normally open high voltage main contact; and a normally closed high voltage auxiliary contact coupled to the input and coupled in series with the low voltage coil, the normally closed high voltage auxiliary contact magnetically linked with the high voltage coil and including a phase opposite the normally open high voltage main contact, wherein: when the input is coupled to a high voltage power source, based on the predetermined voltage range, the high voltage contactor is configured to open, via the high voltage coil, the normally closed high voltage auxiliary contact to disconnect the low voltage coil from the input such that the ATS operates in a high voltage mode, and when the input is coupled to a low voltage power source, based on the predetermined voltage range, the low voltage contactor is configured to close, via the low voltage coil, the normally open low voltage main contact such that the ATS operates in a low voltage mode.