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Contact arc extinguishing system of circuit breaker

A contact system and circuit breaker technology, which is applied to circuit breaker contacts, circuit breaker components, etc., can solve the problems that arcs cannot be completely extinguished and the safety hazards of circuit breakers, and can meet the requirements of rapid arc extinguishing and enhanced arc extinguishing ability Effect

Pending Publication Date: 2018-09-14
SHANGHAI LIANGXIN ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the arc generated by the circuit breaker cannot be completely extinguished, and it is easy to overflow the arc extinguishing chamber, causing a safety hazard to the use of the circuit breaker

Method used

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  • Contact arc extinguishing system of circuit breaker
  • Contact arc extinguishing system of circuit breaker
  • Contact arc extinguishing system of circuit breaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] as attached Figure 1a , 1b As shown in and 2, an arc extinguishing system of a circuit breaker includes an arc extinguishing chamber 1 and a contact system 2, and the contact system 2 includes a moving contact system 201 and a static contact system 202, and the moving contact The engagement or breaking of the system 201 and the static contact system 202 controls the on-off of the circuit breaker circuit, wherein:

[0028] as attached Figure 4 As shown, the moving contact system 201 includes a long moving contact assembly 201a, and short moving contact assemblies 201b are symmetrically arranged side by side on both sides of the long moving contact assembly 201a, and the long moving contact assembly 201a is smaller than the The short moving contact assembly 201b is long, and the long moving contact assembly 201a and the short moving contact assembly 201b can rotate around the same rotation center, as shown in the attached Figure 5 As shown, the long moving contact as...

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PUM

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Abstract

The invention discloses a contact arc extinguishing system of a circuit breaker. The contact arc extinguishing system of the circuit breaker comprises an arc extinguishing chamber (1) and a contact system (2); the contact system (2) comprises a movable contact system (201) and a static contact system (202); and connection or disconnection of the movable contact system (201) and the static contactsystem (202) controls on and off of a circuit of the circuit breaker. The contact arc extinguishing system of the circuit breaker is characterized in that the static contact system (202) comprises a static contact plate (202a); a striking arc angle (202a03) is arranged at the front end of the static contact plate (202a); the striking arc angle (202a03) is shaped like a trapezoidal dovetail; and anarc extinguishing grid piece group (103) of the arc extinguishing chamber (1) is 3-shaped. According to the contact arc extinguishing system of the circuit breaker and through improvement of the circuit breaker contact arc extinguishing system, the arc extinguishing ability of the arc extinguishing chamber is enhanced, and the fact that the electrical life and the disconnection ability of the frame circuit breaker meet the related standard requirement is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of low-voltage electrical appliances, and specifically relates to a contact arc extinguishing system of a circuit breaker, which is suitable for DC and AC power systems. Background technique [0002] The circuit breaker is the most important power distribution equipment in the low-voltage power distribution system. With the continuous improvement of the power supply and power transmission and distribution equipment requirements of the power engineering team, the performance requirements for circuit protection switches are also getting higher and higher, miniaturization, high Performance, modularization, and high reliability are the main development directions of air circuit breakers at this stage. The contact and arc extinguishing system are important components of the circuit breaker. The design of the contact shape and size in the contact system is very critical, which is directly related to the electrical...

Claims

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Application Information

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IPC IPC(8): H01H73/04H01H73/18
CPCH01H73/04H01H73/18
Inventor 琚纪红李强杨园张亚欣于贻鹏向洪岗
Owner SHANGHAI LIANGXIN ELECTRICAL