US 6,472,627 B1Granted

Vacuum circuit breaker

AssigneeLG Industrial Systems Co., Ltd.

InventorSeok Jung Yoon

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Abstract

A contact portion switch device of a circuit breaker which is capable of guaranteeing reliable operation by restraining distortion of each construction part in the operation of the circuit breaker and permitting an easy installation of an additional part for performing multifunction is disclosed. A switch lever installed in order to rotate between a penetration position and a cut-off position of a fixed contact portion and a movable contact portion, a cut-off spring combined to the switch lever, an operating wheel installed on the side of the switch lever so as to be rotational, an operating wheel for rotating the operating wheel, an operating arm installed on the side of the operating wheel so as to be rotational, an electric link interposed between the operating wheel and operating arm, a penetration spring combined to the operating arm, a trip arm combined to a rotating shaft of the switch lever, a trip latch for preventing the switch lever from rotating to the cut-off position, a penetration latch installed on the side of the operating wheel, and a transmission part placed between the operating arm and switch lever is also disclosed.

Claims20

Dependent claims

A vacuum circuit breaker comprising:

a movable contactor;
a fixed contactor;
a first and a second spring for providing a spring force for engaging the movable contactor with the fixed contactor in a contact position or separating the movable contactor from the fixed contactor in a non-contact position, said first spring providing the spring force for engaging the movable contactor with the fixed contactor when said first spring is elastically energized, and said second spring providing the spring force for separating the movable contactor from the fixed contactor when said second spring is elastically energized;
said first spring having a one end portion for providing the spring force and an other end portion for providing a supporting point to be extended or compressed;
said second spring having a one end portion for providing the spring force and an other end portion for providing a supporting point to be extended or compressed, wherein said other end portion of the first spring is arranged vertically opposite to said other end of said second spring;
a plurality of links providing the spring force provided from the first spring or the second spring to the movable contactor;
and
means for energizing at least one spring among the first and second spring.

5 more elements

Dependencies are inferred from the claim text.