There is interlock between manual and automatic operation, this can avoid the manual operation on the automatic operation. When the executive handle of circuit breaker is broken, the contact is felted or the load is in problem(overload, short circuit), the ATS do not transfer, the is called the real electromechanical interlock. The wrong wire connection indication can be supplied. When the phase wire and zero wire is connected wrong, the sound-photo device will alarm, it ensures the reliability.
5. Function of controller in HATS automatic transfer switch
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