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A contact system of a double-breaking-point circuit breaker

A contact system and circuit breaker technology, which is applied in the direction of circuit breaker contacts and circuit breaker components, can solve the problems of poor stability of tension springs and poor contact pressure stability, and achieve high stability, stable contact pressure, The effect of improving the breaking ability

Active Publication Date: 2017-05-31
SHANGHAI RENMIN ELECTRICAL APP WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent is a single break point structure, and the spring used in this patent is a tension spring, and the stability of the tension spring is poor, so the stability of the contact pressure provided by it is poor

Method used

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  • A contact system of a double-breaking-point circuit breaker
  • A contact system of a double-breaking-point circuit breaker
  • A contact system of a double-breaking-point circuit breaker

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Embodiment

[0031] A contact system for a double break circuit breaker such as figure 1 As shown, it includes a moving contact rod 2, a support plate 7, a contact support 8, a short axis 3, a major axis 4, a spring upper support 5, a spring lower support 6 and a compression spring 9. Both ends of the moving contact rod 2 are It has a moving contact 1, and the connection and breaking of the circuit is realized by contacting and separating the static contacts on the static contact rod. The static contact rod is used for electrical connection with the current incoming terminal and outgoing terminal; there are two support plates 7, Arranged in parallel at intervals, the moving contact rod 2 is arranged between two support plates 7, and each support plate 7 is provided with a through hole for the long axis 3 to pass through and a chute for the long axis 4 to move linearly. There are two through holes on the plate 7, and they are arranged diagonally. There are two chutes on each support plate 7...

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PUM

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Abstract

The invention relates to a contact system of a double-breaking-point circuit breaker. The contact system comprises a movable contact rod, support plates, contact terminal supports, short shafts, long shafts, spring upper supports, spring lower supports and compression springs. Two centrally symmetrical rotation holes are arranged in the movable contact rod. The number of the short shafts is four. Each short shaft goes through through holes in the spring upper support on both sides of the movable contact rod and the corresponding support plate to be fixed on the corresponding contact terminal support. The number of the long shafts is two. The long shafts pass through the pair of spring lower supports and the rotation holes of the movable contact rod so that the both ends of the long shafts are respectively positioned in sliding grooves in the support plates. Each compression spring is arranged between one of the spring upper supports and the corresponding spring lower support. When relative rotation occurs between the movable contact rod and the support plates, the long shafts move upwards and downwards in the sliding grooves of the support plates. Compared with contact systems in the prior art, the compression springs are employed to provide a contact pressure and realize a drop-proof function of the movable contact rod after being lifted by an electric expulsive force. Meanwhile, the double-breaking-point circuit breaker structure is set to further improve the breaking-off capability of the contact system.

Description

technical field [0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to a contact system of a double break point circuit breaker. Background technique [0002] A circuit breaker is a device that can close, carry and break current under normal circuit conditions, and can cut off the current within a specified time under fault conditions. The contact system of the circuit breaker is used to make and break the current, and has a self-maintaining opening characteristic. The contact system carries current to maintain the path when the circuit breaker is closed, and cuts off the path to form a fracture in the fault state. Each phase of the double break point molded case circuit breaker forms two breaks after being separated. When a short-circuit current is generated in the circuit, the moving contacts are repelled by the electric repulsion, and an arc is generated between the moving and static contacts. Since this r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H73/04
CPCH01H73/04
Inventor 马立超曹梁张晓天蔡燕峰
Owner SHANGHAI RENMIN ELECTRICAL APP WORKS
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