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Arc-extinguishing plate, manufacturing method of arc-extinguishing plate, and switch

A manufacturing method and technology of arc extinguishing boards, which are applied to electric switches, high-voltage air circuit breakers, high-voltage/high-current switches, etc., can solve the problems of arc extinguishing performance of arc extinguishing boards, damage to circuit breakers, etc., and achieve arc extinguishing Effects of performance improvement and breaking performance improvement

Active Publication Date: 2022-06-28
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the arc extinguishing performance of the arc extinguishing plate is degraded, the circuit breaker may be damaged due to the arc current

Method used

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  • Arc-extinguishing plate, manufacturing method of arc-extinguishing plate, and switch
  • Arc-extinguishing plate, manufacturing method of arc-extinguishing plate, and switch
  • Arc-extinguishing plate, manufacturing method of arc-extinguishing plate, and switch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0026] figure 1 It is a cross-sectional view of the electromagnetic switch in Embodiment 1 of the present invention when viewed from the lateral direction.

[0027] use figure 1 Each configuration of the electromagnetic switch 100 according to the first embodiment will be described. The mount 1 is formed of an insulator. The fixed iron core 2 is fixed to the mount 1, and is formed by laminating silicon steel sheets in an E shape. The operation coils 3 are respectively arranged in the concave portions of the mountain-shaped fixed iron core 2 .

[0028] The frame body 4 is fixed to the mounting seat 1 and is molded from the same insulating material as the mounting seat 1 . Moreover, the housing|casing 4 has the housing|casing head slide part 4a which opposes the head slide part a of the crossbar 9 mentioned later. The movable iron core 5 is formed by laminating silicon steel sheets in the same E shape as the fixed iron core 2 . In addition, the movable iron core 5 and the ...

Embodiment approach 2

[0065] Next, the manufacturing method of the arc extinguishing plate in Embodiment 2 of this invention is demonstrated.

[0066] As the overall weight composition ratio, a silica sand material containing 80% or more by weight of silica as the main component and 60% as the main component, and magnesia and alumina as sintering aids at 20% were mixed and stirred. Forming Auxiliary PVA (resin: polyvinyl alcohol) was diluted with pure water into a solution of 10% by volume, and mixed and stirred in a mortar.

[0067] Here, as the silica sand material, a material having a particle size distribution of 50 to 150 μm and a center particle diameter of about 100 μm is used, and magnesia and alumina use a material with a center particle diameter of about 1 μm.

[0068] Next, a desired amount of the mixed and stirred material is weighed on a mold coated with oleic acid as a mold release material, and processed into a plate shape by pressing. Here, 10 g of the mixed material was weighed fo...

Embodiment approach 3

[0082] Next, the manufacturing method of the arc extinguishing plate in Embodiment 3 of this invention is demonstrated.

[0083] As the overall weight composition ratio, a silica sand material containing 80% or more of silicon oxide by weight (here, a material with a weight ratio of 95% of silicon oxide) as the main component, 60% of magnesium oxide as a sintering aid And alumina was mixed and stirred at 20% by adding PVA (resin: polyvinyl alcohol) diluted with pure water as a molding aid to a solution of 10% by volume, and mixed and stirred in a mortar.

[0084] Here, three types of silica sand materials are used, namely, a particle size distribution of 50 to 150 μm and a center particle diameter of about 100 μm, a particle size distribution of 75 to 450 μm and a center particle diameter of about 200 μm, a particle size distribution of 200 to 1200 μm and a center particle diameter of 500μm or so. In addition, the manufacture of an arc extinguishing plate was attempted using ...

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Abstract

The arc extinguishing plate according to the present invention is an arc extinguishing plate used to extinguish arc current generated between open and close contacts, and the surface of the arc extinguishing plate has a convex portion and a concave portion formed between adjacent convex portions. The concavo-convex part is formed, and the convex part and the concave part are composed of different materials. Both the interrupting performance of the arc current and the arc extinguishing performance can be improved, and in the application product of the arc extinguishing plate, the space saving of the arc extinguishing chamber by the high performance arc extinguishing function can be realized.

Description

technical field [0001] The present invention relates to an arc extinguishing plate for extinguishing an arc, a method for manufacturing the same, and a switch to which the arc extinguishing plate is applied. Background technique [0002] In a switch such as a circuit breaker or an electromagnetic switch, an arc extinguishing device is used that eliminates arc discharge generated between contacts when the contacts are opened. The arc extinguishing device is provided with an arc extinguishing plate for efficiently extinguishing the arc. Furthermore, there is provided a mechanism that extends and guides the arc generated between the contacts by electromagnetic force applied by a coil or the like, so that the arc is brought into contact with the arc extinguishing plate (for example, refer to Patent Documents 1 to 3). [0003] When the generated arc comes into contact with the arc extinguishing plate, the arc is cooled and the arc voltage becomes higher than the power supply vol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H9/34H01H9/44H01H33/08
CPCH01H9/34H01H9/44H01H33/08
Inventor 松本纪久
Owner MITSUBISHI ELECTRIC CORP
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