Built-in current overload protector

A technology of current overload and protector, which is applied in the direction of circuits, electric switches, electrical components, etc., to achieve precise protection and improve the effect of protection accuracy

Pending Publication Date: 2020-01-07
JIANGSU CHANGRONG ELECTRICAL APPLIANCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a built-in device that can realize precise protection of different electrical equipment through a simple structure and make up for the lack of protection accuracy caused by the span between the bimetallic plates. type current overload protector

Method used

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Effect test

Embodiment approach

[0022] As a preferred embodiment of the present invention, the double-piece connecting piece 7 includes a sheet body made of copper alloy, iron alloy or stainless steel, the thickness of the sheet body is preferably between 0.3 and 1.5 mm, and the shape can be waist round as figure 2 , 3 As shown, it can also be a rectangle such as Figure 4 As shown, it can also be figure 8 or other shapes, which are not shown in the figure. In actual operation, according to the protection accuracy or protection level required by the electrical equipment, for example, the resistance value of the bimetal sheet must reach 120Ω, combined with the bimetal sheet grade of the protector used in the electrical equipment, such as the actual bimetal sheet grade used. The corresponding resistance value is 100Ω. Calculate the resistance difference between the resistance value corresponding to the bimetal plate grade and the required protection accuracy or protection level of the electrical equipment. ...

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Abstract

The invention discloses a built-in current overload protector, which comprises a metal shell with an opening at the bottom, a metal bottom plate for sealing the bottom of the metal shell, a bimetallicstrip and a plurality of binding posts, wherein one end of the bimetallic strip is provided with a moving contact, one end of one of the binding posts is provided with a static contact, and the moving contact and the static contact are arranged correspondingly. The built-in current overload protector further comprises a double-piece connecting sheet made of metal, and the double-piece connectingsheet can adjust the resistance value of the bimetallic strip at will. One end of the double-piece connecting sheet is fixedly connected with the other end of the bimetallic strip, and the other end of the double-piece connecting sheet is fixedly connected with the inner wall of the metal shell. The double-piece connecting sheet comprises a sheet body made of copper alloy, iron alloy or stainlesssteel. The sheet body of the double-piece connecting sheet is provided with at least one through hole or at least one bulge. According to the invention, accurate protection of different protection precisions or protection levels required by different electrical equipment is achieved by adopting the double-piece connecting sheet with different resistance values.

Description

technical field [0001] The invention relates to an electric protector, in particular to a built-in current overload protector which is arranged inside electrical equipment such as motors and compressors, and can automatically cut off the power supply to prevent it from burning out when the electric equipment is over-current. Background technique [0002] The existing built-in current overload protector includes a metal shell with an open bottom, a metal bottom plate that closes the bottom of the shell, a bimetallic strip and several binding posts; one end of the bimetallic strip is provided with a moving contact, and the other end of the bimetallic strip It is fixedly connected with the inner wall of the housing, and one ends of the several terminals respectively pass through the base plate and extend into the closed space formed by the housing and the base plate. A static contact, the movable contact is arranged correspondingly to the static contact, and a mixed inert gas i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H37/54
CPCH01H37/5418H01H2037/5463
Inventor 匡成效
Owner JIANGSU CHANGRONG ELECTRICAL APPLIANCE CO LTD
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