Disk-type gyromagnetic vacuum arc extinguish chamber

Abstract

The invention belongs to the field of vacuum circuit breakers and in particular relates to a disk-type gyromagnetic vacuum arc extinguish chamber, which comprises a conductive rod (1), a contact cup bottom (2), an iron core (7) and a contact cup (3), wherein the contact cup bottom (2), the contact cup (3) and the conductive rod (1) are in fixed matching connection in sequence; the iron core (7) is arranged in the contact cup (3); 12 to 30 winding grooves (6) are formed on the iron core (7) at equal intervals; a coil winding (8) is arranged in each winding groove (6); the width of each winding groove (6) is 2.5 to 3 mm; the coil windings (8) are distributed in a radial shape along the radial direction to form a disk-type structure; and a contact sheet is fixed at the end of the contact cup bottom (2). The disk-type gyromagnetic vacuum arc extinguish chamber has the advantages that: a transverse magnetic field is provided, and a longitudinal magnetic field function can be realized; electric arc energy can be dissipated, and a temperature dropping speed of electric arc is high; and the disk-type gyromagnetic vacuum arc extinguish chamber is high in insulating performance, high in breaking capacity, convenient to install and maintain, and high in operating reliability.

Description

technical field [0001] The invention belongs to the field of vacuum circuit breakers, in particular to a disk-type gyromagnetic vacuum interrupter. Background technique [0002] In the power system, high-voltage switchgear plays the role of control and protection. High-voltage circuit breakers are the most important electrical equipment, mainly used for closing and breaking circuits. In recent years, with the rapid development of the electric power industry, the voltage level and capacity have been increasing day by day, and the demand for high performance and low pollution electricity has provided a broader research and development and application space for the development of vacuum circuit breakers. [0003] The improvement of the contact structure of the vacuum interrupter has mainly gone through three stages: the disc-shaped flat contact, the transverse magnetic field contact and the longitudinal magnetic field contact. [0004] (1) Disc-shaped flat contact: The disc-s...

AI Technical Summary

Problems solved by technology

The Lorentz force generated by the interaction between the transverse magnetic field contact and the arc current makes the arc move in the circumferential direction, and the transverse magnetic field will bend and elongate the moving arc, which will increase the arc voltage and arc energy, resulting in limited breaking capacity , and the ablation degree of the contact is still stronger when the arc is concentrated than when the arc is diffused, the density of the remaining plasma in the arc gap is still high when the current crosses zero, and the re-ignition phenomenon will still occur when the recovery voltage is high

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