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Gas blast arc-quenching type AC permanent magnet intelligent circuit breaker

A smart circuit breaker, gas blowing arc extinguishing technology, applied to circuit breaker parts, protective switch operation/release mechanism, etc., can solve problems such as easy failure, difficulty, poor arc extinguishing effect, etc., to increase arc extinguishing speed, The effect of reducing the arc length and improving the arc extinguishing effect

Inactive Publication Date: 2014-07-09
乐清市牵引机电厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

attached from its manual figure 1 It can be clearly observed that the structure of the connecting rod mechanism is very complex, with many parts, which is prone to failure and difficult to operate reliably for a long time; in addition, as we all know, since DC has no zero point, its arc extinguishing is more difficult than AC arc extinguishing , and the arc extinguishing system of this kind of DC circuit breaker is relatively simple, only relying on the arc extinguishing plate to lead the arc to the arc extinguishing cover, the arc extinguishing effect is poor, so its arc extinguishing effect needs to be improved urgently

Method used

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  • Gas blast arc-quenching type AC permanent magnet intelligent circuit breaker
  • Gas blast arc-quenching type AC permanent magnet intelligent circuit breaker
  • Gas blast arc-quenching type AC permanent magnet intelligent circuit breaker

Examples

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Embodiment 1

[0027] Figure 1 to Figure 3 A specific embodiment of the invention is shown in which figure 1 It is a structural schematic diagram of the present invention; figure 2 for figure 1 The structure schematic diagram of the operating mechanism in the air-blown arc-extinguishing type DC permanent magnet intelligent circuit breaker shown; image 3 for figure 2 Schematic diagram of the structure of the coil assembly in the air-blown arc-extinguishing type DC permanent magnet smart circuit breaker.

[0028] This embodiment is a gas-blown arc-extinguishing type DC permanent magnet intelligent circuit breaker, see Figure 1 to Figure 3, including a base 1, an incoming busbar 2, a moving contact 3 electrically connected to the incoming busbar 2, a moving contact support 4, a static contact 5, and a moving contact electrically connected to the static contact 5 Outgoing busbar 6, static contact support 7, operating mechanism 8 for driving the moving contact 3 to open and close, and a...

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Abstract

The invention discloses a gas blast arc-quenching type AC permanent magnet intelligent circuit breaker, comprising a base, an incoming busbar, a dynamic contact electrically connected with the incoming busbar, a dynamic contact supporting part, a static contact, an outgoing busbar electrically connected with the static contact, a static contact supporting part, an operating mechanism used for driving the dynamic contact to open and close and an arc quenching mechanism used for quenching arc; wherein, the arc quenching mechanism comprises an arcing shield and an arcing ring, and also comprises a normally closed solenoid valve used for closing or conducting a pipeline communicated with an external air source and an air blowing nozzle used for quickly breaking the arc by blowing; an air intake of the air blowing nozzle is communicated with the normally closed solenoid valve via the pipeline. During opening, the circuit breaker adopts high-pressure air to quickly break the arc by blowing, effectively reduces the length of the arc and quickly blows the arc into the arcing shield to quench the arc, thus greatly improving the arc quenching speed.

Description

technical field [0001] The invention belongs to the technical field of DC switches, and in particular relates to an intelligent DC circuit breaker. Background technique [0002] DC circuit breakers are mainly used in industrial and mining electric locomotives in my country to protect DC motors from short-circuit or overload. The existing DC fast circuit breaker generally adopts DC solenoid electromagnet to operate and drive. Compared with the operating mechanism made of DC motor and fan, the structure is relatively simple, but its operating current is large and the opening time is long. Therefore, it is necessary to increase the diameter of the wire and the size of the electromagnet, so that the volume of the entire circuit breaker becomes larger. Due to the self-overheating and impact force caused by the increase in the size of the electromagnet, it is difficult to meet the frequent operation requirements of the electric locomotive. [0003] Patent literature CN2105761U d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H73/18H01H71/32
Inventor 郑汉华
Owner 乐清市牵引机电厂
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