Prepaid breaker arc-initiating device

Abstract

The invention discloses a prepaid breaker arc-initiating device, comprising an outer shell. A magnetic release, a conductive system, an electronic controller, an arc-extinguishing system and a tripping mechanism are arranged in the outer shell. An arc discharging port is arranged at the lower part of the outer shell; the conductive system comprises a run-on plate, a wiring board, a movable contact, a contact support and a static feeler lever. The run-on plate is bent to form two parallel portions which are paralleled with each other; an arc receiving surface is arranged at the place of the run-on plate. An L-shaped bending and welding boss is arranged at one end of the run-on plate, and a bent arc leading surface is arranged at the other end of the run-on plate; the arc leading surface is fixed in a locating groove on the outer shell, and the static feeler lever is bent as V shape or U shape; two locating bosses which corresponds to each other are arranged on the static feeler lever. A welding silver contact is arranged at the bending surface of the static feeler lever, and the magnetic release is sleeved at the outside of a release iron core via a tripping coil and is accessed with the electronic controller via a lead. The benefits of the prepaid breaker arc-initiating device are as follows: the magnetic blow-out effect is good, the arc leading speed is fast, and breaking capacity of the prepaid breaker is greatly improved.

Description

technical field [0001] The invention relates to a component for a circuit breaker, in particular to an arc striking device for a prepaid circuit breaker. Background technique [0002] A circuit breaker (English name: circuit-breaker, circuitbreaker) refers to a switch that can close, carry and break current under normal circuit conditions and can close, carry and break current under abnormal circuit conditions within a specified time device. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. The division of high and low voltage boundaries is relatively vague. Generally, those above 3kV are called high-voltage electrical appliances. [0003] Circuit breakers can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, and automatically cut off the circuit when they are severely overloaded, short-circuited, or under-voltage. Its function is equi...

AI Technical Summary

Problems solved by technology

The arc ignition device in the existing prepaid circuit breaker has complicated structure, poor magnetic blowing effect, slow arc ignition speed, and poor segmentation ability

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