Current limiter assembly for a circuit breaker

Details Current limiter assembly for a circuit breaker Current limiter assembly for a circuit breaker

H - Electricity

01

H

306/60

H01H 73/22 (2006.01) H01H 71/16 (2006.01) H01H 77/10 (2006.01)

Patent

CA 1095566

Abstract of the Disclosure The following specification describes a bimetal in the limiter assembly of a circuit breaker to operate the trip crossbar for opening the main circuit breaker contacts. An arm is also provided on one blade of the current limiter contacts to also operate the trip crossbar for ensuring rapid opening of the main contacts of the circuit breaker in response to high fault currents. The bimetal is connected between the electromagnet winding and one of the current limiter contact blades in shunt with a path of selected resistance. The resistance is selected as desired by connecting pigtail conductors of desired size either in shunt with or to selected portions of the bimetal to control the current passing through the bimetal for controlling the heat of the bimetal in accordance with the rating of the breaker. A calibration assembly for the bimetal is carried by the electromagnetic assembly.

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