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Multipolar low-voltage breaker with double breaks and plastic case

A molded case circuit breaker, double break point technology, applied in the direction of circuit, protection switch parts, electrical components, etc., can solve the problems of high manufacturing requirements, complex structure, etc., to achieve flexible and convenient installation, reliable connection, contact Effect of Bridge Motion Speed ​​Improvement

Inactive Publication Date: 2003-05-07
ZHEJIANG CHINT ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of high manufacturing requirements and complex structure in the prior art. Reliable mechanical connection and transmission between the individual unipolar units

Method used

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  • Multipolar low-voltage breaker with double breaks and plastic case
  • Multipolar low-voltage breaker with double breaks and plastic case
  • Multipolar low-voltage breaker with double breaks and plastic case

Examples

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Embodiment Construction

[0020] Referring to the accompanying drawings, the large housing 23 of the multi-pole low-voltage double-breakpoint molded case circuit breaker includes three unipolar units, and each unipolar unit includes a hexahedral small housing, and the small housing is provided with two static contacts 4 , 5. The rotary bridge-shaped moving contact 12 matched with the static contacts 4 and 5, and the arc extinguishing chambers 8 and 9 matched with each contact form a pole 1 of the circuit breaker. Multiple small housings are arranged side by side in the large housing to form the poles of the multi-pole circuit breaker. An operating mechanism 19 is arranged above the middle pole.

[0021] Each small housing is composed of two relatively independent arc extinguishing chambers 8, 9 positioned and plugged through the seams (51, 52). The opposite surfaces of the two are arc surfaces 16, 17, which form a circular shape after relative assembly. Chamber 18. The shell of the arc extinguishing ...

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Abstract

The breaker possesses the following characters: The relatively independent encapsulated units constitute the two arc extinguish chambers of each pole in the breaker; The moving contacts of the each pole through the contact support are set up on the same revolution axis; The contact support through the connection rod is connected to the operating mechanism in the one small case. There are the partition walls between the poles on the big case. The bearings are installed on the partition walls in order to support the revolution axis. The relative simple structure is adopted to implement the reliable connection and transmitting motion between each single pole unit. The invention provides the features of the flexible, convenient and simplified assembling procedure.

Description

technical field [0001] The invention relates to a multi-pole low-voltage double-breakpoint molded case circuit breaker. Each pole of the circuit breaker includes a single-pole breaking unit. The single-pole breaking unit has a hexagonal box made of molded plastic, contacts and extinguishers. The arc chambers are matched and installed in the hexagonal box, and several identical units are placed side by side in a large hexagonal box to form a multi-pole circuit breaker. Background technique [0002] The above-mentioned circuit breaker structure is well known, and a more specific structure is disclosed in the specification of Chinese patent document ZL 92111529.6 "Multipole Circuit Breaker with Single Pole Unit". In the form of a head, it cooperates with two static contacts placed opposite to each other. The bridge contact is supported by a rotatable rod-shaped block, which protrudes laterally from the center of the box and is inserted into the two larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/02H01H71/10
Inventor 李述尧李然段育明
Owner ZHEJIANG CHINT ELECTRIC CO LTD
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