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Electrode structure for vacuum circuit breaker

A vacuum circuit breaker and electrode structure technology, which is applied to high-voltage air circuit breakers, circuits, electric switches, etc., can solve the problems of reduced partition performance and partition failure, and achieve the effects of improved partition performance, stable longitudinal magnetic field, and good conductivity

Inactive Publication Date: 2011-09-14
MEIDENSHA ELECTRIC MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, based on the results of disassembly investigation and arc observation after the isolation test in the electrode structure for vacuum circuit breakers, it is newly determined that the outer peripheral portion of the contact table installed behind the contact plate has caused isolation failure due to destruction of insulation. , the partition performance is reduced

Method used

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  • Electrode structure for vacuum circuit breaker
  • Electrode structure for vacuum circuit breaker
  • Electrode structure for vacuum circuit breaker

Examples

Experimental program
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Embodiment 1

[0020] Embodiments of the electrode for a vacuum circuit breaker according to the present invention will be described below with reference to the drawings. image 3 A main part of a vacuum circuit breaker using an electrode for a vacuum circuit breaker according to an embodiment of the present invention is shown. Both ends of the insulating cylinder 1 are gas-tightly closed by end plates 2, 3 to form a vacuum container 4, and a pair of fixed-side and movable-side electrodes 5, 6 are provided to face each other inside the vacuum container 4.

[0021] The fixed side electrode 5 is fixed on the end plate 2 through the fixed side rod 7. On the other hand, the movable side electrode 6 is installed on the movable side rod 9, and the movable side rod 9 can pass through the bellows 8 to keep the vacuum container 4 While in the vacuum state, it moves along the axial direction.

[0022] The movable side lever 9 is connected to an operator not shown in the figure, and the movable side e...

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Abstract

Provided is an electrode structure for a vacuum circuit breaker, wherein dielectric breakdown on an outer circumferential section of a contact base arranged at the rear of a contact board is eliminated and interruption performance is further improved. A contact board (11) and a contact base (12) for generating vertical magnetic field are formed of a copper-based alloy, such as a copper-chromium alloy, and on an outer circumferential section of the contact base (12) for generating vertical magnetic field, an outer circumferential section film (17) is arranged by plasma irradiation of chrome, i.e., a high-resistance conductor having a melting point higher than that of the contact board (11).

Description

technical field [0001] The present invention relates to an electrode structure for a vacuum circuit breaker which distributes an arc substantially uniformly on the surface of a contact plate by applying a longitudinal magnetic field. Background technique [0002] As an electrode structure for a vacuum circuit breaker that separates a pair of electrodes while maintaining the vacuum degree in the vacuum container, and eliminates an arc generated between the electrodes in a vacuum, the following types are known, wherein In the axial direction, a longitudinal magnetic field is generated, and the arc is basically evenly distributed on the surface of a pair of contact plates, so as to improve the isolation ability. [0003] For example, as described in JP Unexamined Patent Publication No. 2003-86068 (Patent Document 1), the following electrode structure is known, which is composed of a cylindrical contact table and a contact plate. A plurality of inclined slots formed by inclined...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/66
CPCH01H33/6643H01H33/6642H01H1/0206
Inventor 松井芳彦
Owner MEIDENSHA ELECTRIC MFG CO LTD
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