Protective circuit for dynamic braking resistors

Details Protective circuit for dynamic braking resistors Protective circuit for dynamic braking resistors

H - Electricity

02

H

318/84, 342/34.3

H02H 3/00 (2006.01) H02H 3/36 (2006.01) H02H 5/08 (2006.01)

Patent

CA 1068331

ABSTRACT A circuit for protecting a pair of dynamic brake resistors when either of two motors driving fans for cooling the resistors fails. A sensing circuit couples the terminal of the two motors to a switch circuit. The sensing circuit reduces the energy to the switch circuit which removes power to the resistors when the sensing circuit senses a failure in one of the motors.

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