Circuit breaker with improved single coil actuator and...

Details Circuit breaker with improved single coil actuator and... Circuit breaker with improved single coil actuator and...

H - Electricity

01

H

306/282

H01H 73/36 (2006.01) H01H 83/20 (2006.01) H02H 3/10 (2006.01) H02H 3/24 (2006.01)

Patent

CA 1074375

ABSTRACT OF THE DISCLOSURE A multipole circuit breaker including a trip release actuator having a single coil coaxially surrounding a plunger and mounted within a hollow cylindrical actuator support frame. The actuator is mounted in association with a latch mechanism and includes a spring biasing the plunger toward release of the latch mechanism. The coil is respon- sive to an electronic sensing and control circuit and serves, when energized, to oppose the action of the bias spring and maintain the plunger in a position to prevent release of the latch mechanism during normal conditions. Upon either undervoltage or overcurrent conditions the sensing and control circuit deenergizes the coil, allowing the bias spring to move the plunger into engagement with the latch mechanism, effecting release of the latch mechanism and separation of the circuit breaker contacts.

261230

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