Electrical switching apparatus employing a circuit for selectively enabling and disabling a close actuator mechanism

Abstract From the Canadian patent

A circuit breaker includes separable contacts for movement between a closed position and an open position and , an operating mechanism for moving the separable contacts between the closed and open positions. Current transformers and potential transformers sense current voltage and , frequency conditions of the separable contacts and produce signals corresponding to those electrical conditions. A trip unit employs those signals corresponding to the electrical conditions to produce a trip signal. A trip coil employs the trip signal to actuate the operating mechanism to move the separable contacts to the open position. A closing mechanism produces a close signal and a close , actuator …