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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.
An open transition transfer switch is also called a break-before-make transfer switch. A break-before-make transfer switch breaks contact with one source of power before it makes contact with another. It prevents backfeeding from an emergency generator back into the utility line, for example.