Arc extinguishing structure applied to moulded case circuit breaker and moulded case circuit breaker

Abstract

The invention provides an arc extinguishing structure applied to a molded case circuit breaker and the molded case circuit breaker. The arc extinguishing structure includes: an arc striking system, a magnetic blowing system, an insulating plate system and an arc extinguishing device; the magnetic blowing system includes a core system and a guide Magnetic system; the left and right magnetic guide plates are placed on the left and right sides of the arc extinguishing chamber casing, forming a magnetic field space between the left and right magnetic guide plates. Therefore, the arc extinguishing chamber is placed in the magnetic field space, and the magnetic field space The generated magnetic force acts on the arc entering the arc extinguishing chamber, accelerating the arc to move toward the outlet of the arc extinguishing chamber. The advantages are: the iron core and the left and right magnetic guide plates form a magnetic blowing system. The magnetic blowing system generates a magnetic field with the magnetic force lines inward. This magnetic field accelerates the arc and enters the arc extinguishing device through the arc striking system. The arc is elongated, and the arc-breaker is covered on both sides of the arc-extinguishing grid. The arc-breaker decomposes a large amount of gas under the burning of the arc, and the gas medium enhances the ability to deionize the arc. As a result, the arc extinguishing effect is comprehensively improved.

Description

technical field [0001] The invention belongs to the technical field of circuit breaker research, and in particular relates to an arc extinguishing structure applied to a molded case circuit breaker and the molded case circuit breaker. Background technique [0002] Solar photovoltaic power generation will occupy an important seat in the world's energy consumption in the near future and will become the main body of the world's energy supply. In order to improve the economic benefits of solar energy and reduce the cost of photovoltaic power generation system, it is necessary to increase the system voltage. The current system voltage has reached as high as 1000V. [0003] The short circuit of the line will cause a large number of power generation equipment to burn out and stop power generation in a large area, which will bring huge losses to the power plant. Fast and reliable cutting off of short-circuit current is the key to reducing losses, which puts forward higher requirem...

AI Technical Summary

Problems solved by technology

In the prior art, the arc only enters the arc extinguishing device under the action of electromotive force, which has the problem of slow moving speed of the arc, thus limiting the arc extinguishing effect

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