Disc-type overlapping gyromagnetic vacuum arc extinguish chamber

Abstract

The invention belongs to a vacuum circuit breaker field and especially relates to a disc-type overlapping gyromagnetic vacuum arc extinguish chamber. The vacuum arc extinguish chamber comprises: a conducting rod (1), a contact cup bottom (2) and a contact cup (3). The contact cup bottom (2), the contact cup (3) and the conducting rod (1) are successively matched. The contact cup (3) is provided with an iron core (7) which is equipped with winding slots (6) with equal intervals. Coil windings (8) are placed in the winding slots (6). The coil windings (8), which are distributed along a radial direction and are in a radiation shape, form a disc structure. A contact blade (4) is fixedly arranged on an end of the contact cup bottom (2). More than two groups of the coaxial coil windings (8) are stacked into the winding slots (6) and the coaxial coil windings are staggered with a certain angle theta. According to the invention, a transverse magnetic field can be provided and simultaneously a vertical magnetic field effect can be generated. Using the chamber of the invention helps the loss of the arc energy. The arc can be cooled quickly. An insulating property is good. A breaking capacity is good. Installation and maintenance is convenient. Operation reliability is high.

Description

technical field [0001] The invention belongs to the field of vacuum circuit breakers, in particular to a disc-shaped stacked 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: ...

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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