H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/246, 306/93
H01H 9/30 (2006.01) H01H 9/46 (2006.01) H01H 89/10 (2006.01) H01H 51/22 (2006.01) H01H 71/24 (2006.01) H01H 71/52 (2006.01) H01H 73/18 (2006.01)
Patent
CA 1294306
ABSTRACT A remotely controllable circuit breaker has an improved scheme for effecting rapid arc extinction as well as protecting the breaker contact from the resulting arc current. The breaker includes first and second movable contacts and which are held respectively on parallel extending first and second contact arms and and are driven individually by a switching mechanism including a manual handle with a contact trip capability and by a remotely controllable switch . An arc runner is connected to be in the same electrical potential as the second contact arm and extends in the contact separating direction for receiving the one end of the arc developed between the rapidly separating contacts and and guiding the arc toward an arc extinguishing chute as the first contact moves away from the second contact . The arc runner is connected at its end opposite to the arc chute to an arc drive member which extends immediately behind the second contact arm in parallel relation thereto and is cooperative with the first contact arm to develop electromagnetic repulsion forces therebetween upon the occurrence of the arc by the effect of the current flowing through the first contact arm and the arc drive member in the opposite directions. The repulsion force acts to urge the arc toward the arc chute for rapid arc extinction. At this time, the arc current will bypass the second contact arm for protecting it from the overcurrent.
587998
Kondou Hideya
Kunimoto Youichi
Yano Manabu
Yokoyama Youichi
Electric Power Research Institute
Marks & Clerk
Matsushita Electric Works Ltd.
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