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Automatic transfer switches must also be operated monthly. The monthly test. consists of electrically operating the transfer switch from the standard position to. the alternate position and then a return to the standard position.
Intelligent transfer switch. A transfer switch is an electrical switch that switches a load between two sources. Some transfer switches are manual, in that an operator effects the transfer by throwing a switch, while others are automatic and trigger when they sense one of the sources has lost or gained power. An Automatic Transfer Switch (ATS) is often installed where a backup generator is located, so that the generator may provide temporary electrical power if the utility source fails.