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Relay with high fault current resistance

A fault current and relay technology, applied in the direction of electromagnetic relays, relays, detailed information of electromagnetic relays, etc., can solve problems such as increased loop copper consumption and body resistance, unfavorable product miniaturization, and limited adjustment space, to achieve reduced magnetic resistance, Improve the ability to resist fault current and enhance the effect of magnetic induction

Pending Publication Date: 2020-03-06
XIAMEN HONGFA ELECTRIC POWER CONTROLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But when the fault current is large, such as image 3 As shown, the contact repulsion force caused by the shrinkage current between the contacts becomes larger. According to the prior art, if you want to overcome the shortage of the contact repulsion force caused by the shrinkage current, you can only reduce the current in the same direction or the opposite direction. The distance between the currents, or the length of the relative current-carrying conductors is increased to increase the ampere force, which is then used to counteract the problem of contact bounce failure caused by contact repulsion
[0004] In reality, the space between the current-carrying conductors with the same direction of current or reverse current is limited by the contact gap and space, and the space available for adjustment is very limited; while increasing the length of the relative current-carrying conductors, it will cause a loop The increase of copper loss and body resistance is not conducive to the miniaturization of products

Method used

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  • Relay with high fault current resistance
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  • Relay with high fault current resistance

Examples

Experimental program
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Effect test

Embodiment 1

[0039] When a magnetic circuit is formed in the moving spring assembly, the moving spring assembly is provided with side-by-side current carriers for loading reverse current, and the magnetic conductors 60 are respectively arranged on the sides of the two current carriers facing away from each other.

[0040] Specifically, such as Figure 4As shown, the moving spring assembly includes the first moving reed 11, the first moving contact 21, the first moving spring lead-out piece 31, and the static spring assembly includes the static reed 41, the first static contact 51; the first moving reed 11 and the static reed 41 are respectively arranged in matching positions, one end of the first movable reed 11 is connected with one end of the first movable spring lead-out piece 31, and the first movable contact 21 is arranged on the first movable reed 11. The other end is located on the side away from the first movable spring lead-out piece 31 ; the first static contact 51 corresponds to...

Embodiment 2

[0047] The difference between this embodiment and the first embodiment lies in that the structure forming the magnetic circuit is different, and correspondingly, the anti-short-circuit route is also different. In this embodiment, when a magnetic circuit is formed between the moving spring assemblies, the moving spring assemblies include current carriers arranged side by side for loading current in the same direction, and the magnetic conductive members 60 are respectively arranged on the sides of the two current carriers facing away from each other.

[0048] Specifically, such as Figure 9 As shown, moving spring assembly one and moving spring assembly two are set, and moving spring assembly one includes a second moving spring lead-out piece 32, a second moving reed piece 12, and a second moving contact 22, and moving spring assembly two includes a third moving spring The lead-out piece 33 , the third moving reed 13 , the third moving contact 23 , and the static spring assembl...

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Abstract

The invention relates to a relay with high fault current resistance. A magnetic conductive piece is placed in a magnetic loop generated by fault current on an anti-short-circuit structure, so that themagnetic resistance of the magnetic loop generated by the current is reduced, the magnetic induction intensity of interaction between same-direction current or reverse-direction current is enhanced,and the mutual ampere force is increased. Furthermore, the ampere force of the same-direction current or the reverse-direction current can be increased under the condition that the distance between the same-direction current and the reverse-direction current is not adjusted and the length of the current-carrying conductor is not increased, so that the fault current resistance ability is improved,the copper loss of a conductive loop is reduced, and the size of a product is reduced. The magnetic conductive piece can be implemented in various different structural forms, can be arranged in contact with or in non-contact with a movable spring assembly, can be implemented as a layer of sub-spring piece of the movable spring piece of a multi-layer structure, serves as a part of the movable spring piece, and directly participates in electric conduction while magnetic conduction is achieved. The magnetic conductive piece is simple in structure and convenient to install, the production cost cannot be increased, and the production efficiency cannot be affected.

Description

technical field [0001] The invention relates to the technical field of relays, in particular to a relay with high resistance to fault current. Background technique [0002] The relay is generally composed of a magnetic circuit system, a contact system, a driving part and a base. The magnetic circuit system generally consists of two basically symmetrical magnetic circuits, including stationary magnetizer parts, movable magnetizer parts and coils. The contact system includes a moving spring assembly and a static spring part. The push part is generally played by a push card. The relay coil passes the positive pulse voltage, the magnetic circuit system works, pushes the card to push the moving spring part, and makes the contacts contact, the relay operates, the coil passes the reverse pulse voltage, the magnetic circuit system works, pushes the card to push the moving spring part, and the contacts disconnected, the relay resets. Such as figure 1 , figure 2 As shown, in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H50/16H01H50/56
CPCH01H50/16H01H50/56
Inventor 钟叔明代文广何仲波黄庆阳苏礼季
Owner XIAMEN HONGFA ELECTRIC POWER CONTROLS