Longitudinal magnetic field electrode vacuum switch tube with low loop resistance

A technology of vacuum switching tube and loop resistance, which is applied in the direction of electric switch, high voltage/high current switch, circuit, etc. It can solve the problems of general breaking capacity, limited breaking capacity, large loop resistance, etc., and achieve remarkable superiority effect

Inactive Publication Date: 2009-06-17
湖北汉光科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The cross-section of the conductor in the magnetic field generating part of the transverse magnetic field electrode is relatively large and the length is relatively short, so it has a relatively small loop resistance and can pass a large rated current. However, the melting and ablation of the contact surface cannot be avoided, so the breaking Capability is limited
At present, there is no vacuum switch tube with a transverse magnetic field electrode with a breaking capacity of 63kA and above; the longitudinal magnetic field electrode keeps the vacuum arc generated between the contacts in the non-aggregated state due to the longitudinal magnetic field, and the arc ablation is less than Transverse magnetic field electrode avoids the melting and ablation of the contact surface under the action of vacuum arc, and has a large breaking capacity. At present, almost all vacuum switch tub

Method used

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  • Longitudinal magnetic field electrode vacuum switch tube with low loop resistance
  • Longitudinal magnetic field electrode vacuum switch tube with low loop resistance
  • Longitudinal magnetic field electrode vacuum switch tube with low loop resistance

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Embodiment 1

[0046] use figure 1 Structure, vacuum switch tube with rated voltage 12KV breaking current 63kA, design electrode is 1 / 2 turn coil electrode, contact seat and contact diameter is 80mm, contact seat bottom thickness is 5mm, contact seat side wall thickness is 8mm, elastic The contact support is a circular wave structure, the wall thickness is 1.5mm, the diameter of the auxiliary guide block is 34mm, the gap between the auxiliary guide block and the contact is 0.5mm, and the loop resistance is reduced from 23μΩ without the auxiliary guide block to 11μΩ.

Embodiment 2

[0048] use figure 2 Structure, vacuum switch tube with rated voltage 40.5KV breaking current 31.5kA, designed electrode is 1 / 2 turn coil electrode, contact seat and contact diameter is 80mm, thickness of bottom of contact seat is 5mm, thickness of side wall of contact seat is 8mm , the elastic contact support is a circular wave structure, the wall thickness is 1.5mm, the diameter of the auxiliary guide block is 34mm, the gap between the auxiliary guide block and the contact is 0.5mm, and the loop resistance is reduced from 28μΩ without the auxiliary guide block to 16μΩ .

Embodiment 3

[0050] use image 3 Structure, vacuum switch tube with rated voltage 12KV breaking current 80kA, design electrode is 1 / 2 turn coil electrode, contact seat and contact diameter is 90mm, contact seat bottom thickness is 5mm, contact seat side wall thickness is 8mm, elastic The contact support is a slope structure, the wall thickness is 1mm, the diameter of the auxiliary guide block is 44mm, the gap between the auxiliary guide block and the contact is 0.5mm, and the loop resistance is reduced from 24μΩ without the auxiliary guide block to 10μΩ.

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Abstract

The invention provides a vacuum interrupter with an axial magnetic field electrode with low circuit resistance, which has the low circuit resistance similar as a plate electrode and the strong breaking capacity similar as an axial magnetic field electrode and excellently resolves the conflict between the current conducting capacity and the short-circuit current breaking capacity. A conductive circuit related portion of the vacuum interrupter comprises a movable conducting rod, a contact base, an elastic contact support, an auxiliary current conducting block, a contact and a static conducting rod. The elastic contact support and the auxiliary current conducting block are disposed in an electrode formed by a movable contact, a static contact, a movable contact base and a static contact base, and the movable contact and the static contact are axially arranged correspondingly. The auxiliary current conducting block is cylindrical or circular, and is located inside or outside the elastic contact support. The elastic contact support and the auxiliary current conducting block match in shape, thereby forming an envelope structure. The elastic support is an elastic body axially disposed, and the thickness of the elastic support ranges from 1mm to 5mm. By applying the invention, the circuit resistance of the existing axial magnetic field vacuum interrupter with larger circuit resistance can be obviously reduced.

Description

technical field [0001] The invention relates to the technical field of vacuum switches. Specifically, it is a vacuum switch tube with longitudinal magnetic field electrodes supported by elastic contacts and auxiliary guide blocks. Background technique [0002] Before the present invention was proposed, those skilled in the art knew very well that a vacuum switch tube is also called a vacuum interrupter, which uses a pair of electrodes sealed in a vacuum, such as a contact or a contact and a magnetic field generating structure. Driven by the moving mechanism, it is an electric vacuum device that completes the connection and breaking of the circuit. In order to have a larger breaking current for the vacuum switch tube used in circuit breakers, simple flat electrodes, such as cake-shaped metal material contacts, can no longer meet the requirements. For this reason, there are flat transverse magnetic field electrodes successively, for example, they are processed on the contacts...

Claims

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Application Information

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IPC IPC(8): H01H33/66H01H33/664
Inventor 马进利
Owner 湖北汉光科技股份有限公司
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