Short circuit protection apparatus

Details Short circuit protection apparatus Short circuit protection apparatus

H - Electricity

03

K

318/103

H03K 17/08 (2006.01) B60L 3/00 (2006.01) B60L 11/18 (2006.01) H02H 7/08 (2006.01) H02H 7/085 (2006.01)

Patent

CA 1205516

Abstract of the Disclosure Short Circuit Protection Apparatus An apparatus for controlling the supply of power from a power source to a motor. The apparatus has a controllable switch for coupling power to the motor responsive to a pulse train, a circuit for converting the voltage applied to the motor to a logic signal, a line contactor for connecting and disconnecting the power source to and from the motor, and a microprocessor for generating the pulse train and controlling the line contactor to disconnect and connect the power source from and to the motor in response to the presence and absence of the logic signal, respectively. By sensing short circuits and discontinuing the supply of power in response to the short circuit, a run-away motor speed condition can be avoided, and by using a microprocessor, the present invention is highly reliable, fast, durable, and cost- effective.

443662

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