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A 2/4-Turn Coil Type Longitudinal Magnetic Contact Structure and Its Application Vacuum Interrupter

A longitudinal magnetic and coil technology, which is applied in the field of vacuum switches, can solve the problems of high resistance of the contact system, long current path, and limitation of the increase of the rated current level of the vacuum interrupter, and achieve strong rated current capacity and reduced resistance , It is beneficial to control the effect of the arc

Active Publication Date: 2020-11-17
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coil type longitudinal magnetic contact is one of the most commonly used ones. It has a coil structure and can generate a strong longitudinal magnetic field. However, due to the long current path, the resistance of the contact system is relatively large, which limits the increase of the rated current level of the vacuum interrupter.

Method used

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  • A 2/4-Turn Coil Type Longitudinal Magnetic Contact Structure and Its Application Vacuum Interrupter
  • A 2/4-Turn Coil Type Longitudinal Magnetic Contact Structure and Its Application Vacuum Interrupter
  • A 2/4-Turn Coil Type Longitudinal Magnetic Contact Structure and Its Application Vacuum Interrupter

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Embodiment Construction

[0022] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] figure 1 It is a schematic diagram of the structure of the 2 / 4 turn coil type longitudinal magnetic contact of the present invention. It includes static contact 1 and moving contact 2 with the same structure and opposite arrangement. The static contact 1 includes a static conductive rod 3-1, a 2 / 4 turn longitudinal magnetic coil 4-1 on the static side, a static support seat 5-1 and a static contact piece 6-1, wherein the static conductive rod 3-1, the static side The 2 / 4-turn longitudinal magnetic coil 4-1 is made of oxygen-free copper, the static support seat 5-1 is made of stainless steel, and the static contact piece 6-1 is made of copper-chromium alloy. The 2 / 4-turn longitudinal magnetic coil 4-1 on the static side is welded to the bottom of the static conductive rod 3-1. Its structure is obtained by optimizing the parameters of th...

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Abstract

The utility model relates to a two-quarter-turn coil-type longitudinal magnetic contact structure and a vacuum arc-extinguishing chamber applying the same. The contact structure comprises a static contact and a moving contact which are oppositely arranged; the static contact comprises a static conducting rod, a static side two-quarter-turn longitudinal magnetic coil, a static supporting seat and a static contact piece; the static side two-quarter-turn longitudinal magnetic coil is arranged at the bottom of the static conducting rod, is of a double-layer structure and is provided with four parallel branches; the tail ends of the branches are welded with the static contact piece, and four linear grooves are formed in the static contact piece so as to reduce eddy current; and a static supporting seat is arranged on the back surface of the static contact piece; the moving contact and the static contact are the same in structure, and the contact pieces are oppositely arranged. The structure is applied to the vacuum arc extinguish chamber. Compared with an existing contact structure, the structure greatly reduces the resistance of a contact system reduced under the condition that a certain magnetic field intensity is guaranteed, and improves the rated through-flow capacity of the arc extinguish chamber.

Description

technical field [0001] The invention belongs to the technical field of vacuum switches, and in particular relates to a 2 / 4-turn coil type longitudinal magnetic contact structure and a vacuum interrupter for its application. Background technique [0002] The vacuum interrupter is environmentally friendly and maintenance-free, and has been widely used in medium-voltage switchgear. When the vacuum interrupter is applied to high-voltage switchgear, it is mainly necessary to realize reliable breaking under high current and temperature rise control under high rated current. In high-voltage vacuum interrupters, longitudinal magnetic contacts are usually used to control the arc. On the one hand, it can maintain the arc in a diffuse state and realize breaking of large currents; on the other hand, the longitudinal magnetic contacts are suitable for large opening distances. A high level of insulation can be guaranteed. The coil type longitudinal magnetic contact is one of the most co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/664
CPCH01H33/664
Inventor 王建华王子寒马慧闫静耿英三刘志远毕迎华
Owner XI AN JIAOTONG UNIV
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