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Circuit breaker structure capable of improving breaking capacity

A breaking capacity, circuit breaker technology, applied in the direction of circuit breaker components, circuit breaker contacts, circuits, etc., can solve the problems of non-transfer, burning of bimetallic components, and more burning of moving and static contacts, etc., to achieve smooth and easier discharge , Improve the effect of breaking ability

Pending Publication Date: 2022-06-21
SHANGHAI LIANGXIN ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that when the circuit breaker passes a large short-circuit current in the above-mentioned prior art, the arc transfer between the moving and static contacts is too slow or does not transfer, resulting in more burning of the moving and static contacts and the failure of the circuit breaker when it is not energized; Moreover, the arc nozzle is easily blocked, so that the arc cannot enter the arc extinguishing chamber, and the arc burns the bimetallic components, resulting in the failure of the performance of the circuit breaker.

Method used

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  • Circuit breaker structure capable of improving breaking capacity
  • Circuit breaker structure capable of improving breaking capacity
  • Circuit breaker structure capable of improving breaking capacity

Examples

Experimental program
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Effect test

Embodiment 1

[0031] as attached figure 1 As shown, this embodiment provides an improved structure for the electrical life of a circuit breaker. The casing W of the circuit breaker includes the base 1 and the cover 2, and the static contact 3 is fixedly installed on the base 1 and the cover 2. formed in the chamber, as attached figure 2 , and 3, the arc-blocking rib-1a on the inner side of the base 1 is provided with a recessed portion 1a01 at the corresponding mating position of the static contact 3, and the arc-blocking ribs 2a on the inner side of the cover 2 The contact 3 is provided with a second recess 2a01 at the corresponding mating position. In this embodiment, the two sides of the first arc separation rib 1a and the second arc separation rib 2a are rounded. The first recessed part 1a01 and the second recessed part 2a01 are recessed planes, and the gap between the first recessed part 1a01 and the second recessed part 2a01 and the side surface corresponding to the static contact 3...

Embodiment 2

[0037]In another embodiment of the present invention, the boss B only includes a boss 1b on the inner surface of the base 1 corresponding to the arc-extinguishing chamber 8 . The boss B moves the arc-extinguishing chamber 8 forward and tightens it, preventing the arc-extinguishing grid from directly contacting the arc nozzle, preventing the arc-extinguishing grid from being scalded and the arc nozzle from melting and blocking the plastic, making the arc channel smooth and easier to discharge; other structures and embodiments same.

Embodiment 3

[0039] In an embodiment provided by the present invention, the first boss 1b and the second boss 2b are arranged diagonally on the left and right sides of the arc extinguishing chamber 8 . The number of the first boss 1b and the second boss 2b is preferably one. The other structures are the same as in Example 1.

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Abstract

A circuit breaker structure capable of improving breaking capacity is characterized in that a boss (B) is arranged at a position, corresponding to an arc extinguish chamber (8), on the inner side face of a shell of a circuit breaker. The related structure of the circuit breaker is improved, so that the electric arc quickly enters the arc extinguish chamber and is discharged out of the circuit breaker.

Description

technical field [0001] The invention belongs to the technical field of circuit breakers, and specifically relates to a circuit breaker structure with improved breaking capacity. Background technique [0002] Circuit breakers are an important part of power distribution systems, mainly used in industrial low-voltage power systems to connect and break currents in power grid circuits and to protect lines and power equipment from overload, undervoltage, short circuit, single-phase grounding, etc. failure hazards. The function of the circuit breaker to break the overload or short-circuit current is mainly completed by the operating system, electromagnetic system, contact system and arc extinguishing system installed in the circuit breaker. When there is a fault current in the circuit and the current value exceeds the set value range, the operating mechanism is driven to make the dynamic and static contacts of the circuit breaker disconnect quickly. At this time, the voltage betwe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/02H01H73/18H01H73/04
CPCH01H71/02H01H73/18H01H73/04
Inventor 代文华杨卫
Owner SHANGHAI LIANGXIN ELECTRICAL