Circuit breaker

A technology of circuit breakers and current limiting coils, applied in the direction of circuit breaker components, etc., can solve the problems of poor breaking capacity and current limiting performance of circuit breakers, and achieve the effects of improving breaking capacity, high arc voltage, and increasing impedance

Active Publication Date: 2015-02-11
徐浩清
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of poor breaking capacity and current limiting performance of the circuit breaker in the background technology, the present invention provides a circuit breaker

Method used

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Examples

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Embodiment 1

[0030] Embodiment one: refer to attached Figure 1-8 , the current limiting coil 8 is bent left and right outside the arc extinguishing device 4 to form a wave portion 81 . Such a structure increases the resistance of the current-limiting coil, thereby ensuring the current-limiting capability of the circuit breaker. Embodiment 1 is a molded case circuit breaker. Specifically, an insulator 9 is provided between the arc extinguishing device 4 and the current limiting coil 8 . The setting of the insulator prevents the parts in the shell from being short-circuited by the arc, which affects the performance of the product. More specifically, the insulating member is made of an insulating gas-generating material. In this way, the pressure difference of the gas generated by the insulating part and the magnetic blowing effect can be used to strike the arc more quickly and improve the breaking capacity of the product. More specifically, the insulator 9 is provided with an accommodati...

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PUM

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Abstract

The invention relates to a circuit breaker and solves the problems of poor breaking capability and poor current limiting performance of the circuit breaker. The circuit breaker comprises a casing, wherein a movable contact, a static contact, an arc extinguishing device, a connecting plate and an arc striking sheet are arranged in the casing, the connecting plate is connected with the static contact, an isolation element is arranged between the arc striking sheet and the connecting plate, at least one annular current limiting coil is arranged outside the arc extinguishing device, and the two ends of the current limiting coil are respectively connected with the arc striking sheet and the connecting plate. The circuit breaker has the advantages that a novel current limiting breaking technology is provided, on the premise of not changing the casing size, the breaking performance is irrelevant to a contact material, the extremely high electric arc voltage can be fast obtained, the resistance of the circuit breaker is improved, and the electric arc can be fast extinguished, so the circuit breaker obtains high breaking capability and good current limiting performance.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a current-limiting circuit breaker. Background technique [0002] A circuit breaker is a protective device used to protect circuits and electrical equipment from damage caused by overload or short circuit. Today's universal circuit breaker or molded case circuit breaker not only has the function of protecting circuit wires and electrical devices, but also has the important function of limiting short-circuit current during short-circuit. The performance of this type of circuit breaker is mainly the breaking performance and current limiting performance. In order to improve the breaking capacity and current limiting capacity of the circuit breaker, the arc generated during the breaking process should be quickly extinguished. At present, the following methods are used: 1. Moving contact and static contact 2. Under the guidance of the arc starter, the arc enters the arc extinguishing device; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H73/18
CPCH01H73/18
Inventor 徐浩清
Owner 徐浩清
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