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Two-stage lightning current withstanding fusing structure and fuse adopting same

A two-stage, lightning current technology, used in circuits, electrical components, emergency protection devices, etc., can solve the problems of continuous lightning current resistance and fuse blowing at small currents, achieving small size, long life, good safety effect of effect

Pending Publication Date: 2019-07-23
XIAMEN TAIHANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem in the prior art that the fuse is blown at a small current and withstands lightning current continuously, this application provides a two-stage fuse with a new structure capable of withstanding lightning current

Method used

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  • Two-stage lightning current withstanding fusing structure and fuse adopting same
  • Two-stage lightning current withstanding fusing structure and fuse adopting same
  • Two-stage lightning current withstanding fusing structure and fuse adopting same

Examples

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Effect test

Embodiment 1

[0044] First of all, this embodiment is a fuse structure suitable for a fuse, which can effectively prevent the main circuit from malfunctioning caused by the pulse current. The existing fuse structure is usually a single homogeneous linear structure, which is connected with the electrodes at both ends of the fuse to form a series structure. Once subjected to overload current, the entire fuse will generate a certain amount of heat to cause its temperature to rise. When the temperature is higher than its melting point, it will melt or gasify (melting or gasification depends on its temperature rise time, if the temperature rises too fast , it may lead to gasification of the fuse), thereby forming an open circuit and avoiding damage to the main circuit. But now many fuses are combined with SPD to form a backup protector, so as to comprehensively protect the entire circuit.

[0045] Such as Figure 1-5 As shown, this embodiment is a two-stage lightning current-resistant fusing s...

Embodiment 2

[0050] This embodiment is a two-stage lightning current-resistant fusing structure, including a first-stage conductor 1 connected to an electrode and a second-stage conductor 2 connected to another electrode, the first-stage conductor 1 and the second-stage conductor 2 in series; the melting point of conductor 1 in the first stage is higher than the melting point of conductor 2 in the second stage, conductor 1 in the first stage is energized and heats up and is transmitted to conductor 2 in the second stage, and when the temperature is higher than the melting point, conductor 2 in the second stage is fused and disconnected, and the first stage The cross-sectional area of ​​conductor 1 is smaller than the cross-sectional area of ​​conductor 2 in the second stage.

[0051] In the first stage, the conductor 1 is a conductive structure with a high melting point and a certain resistance value. It is made of tungsten alloy material, and its melting point is about 3100°C. In the seco...

Embodiment 3

[0055] This embodiment is a two-stage lightning current-resistant fusing structure, including a first-stage conductor 1 connected to an electrode and a second-stage conductor 2 connected to another electrode, the first-stage conductor 1 and the second-stage conductor 2 in series.

[0056] The melting point of conductor 1 in the first stage is higher than the melting point of conductor 2 in the second stage. Conductor 1 in the first stage energizes and generates heat and transmits it to conductor 2 in the second stage, and when the temperature is higher than the melting point, conductor 2 in the second stage is fused and disconnected, and conductor 1 in the first stage crosses the circuit. The cross-sectional area is smaller than the cross-sectional area of ​​the conductor 2 in the second stage.

[0057] The fusing structure also includes a heat dissipation structure 3 arranged around the second-stage conductor 2 for heat dissipation, and an insulating medium is provided betwee...

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Abstract

The invention discloses a two-stage lightning current withstanding fusing structure, which is arranged in a fuse, is used for fusing to protect the circuit when the current exceeds a rated value, andcomprises a first-stage conductor connected with an electrode and a second-stage conductor connected with the other electrode, and the first-stage conductor is connected with the second-stage conductor in series; the melting point of the first-stage conductor is higher than that of the second-stage conductor, and the first-stage conductor is electrified and heated and is transmitted to the second-stage conductor, and when the temperature is higher than that of the second-stage conductor, the second-stage conductor is fused and disconnected. The fuse wire temperature diffusion technology, the fuse wire material step combination technology and the fuse wire inductance step offset technology are used, and the characteristics that the fusing structure can withstand large lightning current impact without fusing and the fusing structure can be fused under small power frequency current are achieved.

Description

technical field [0001] The invention belongs to the field of electrical equipment, and in particular relates to a fusing structure for a protection circuit and a fuse thereof. Background technique [0002] A fuse is an electrical appliance that fuses the fuse with the heat generated by itself and disconnects the circuit when the current exceeds the specified value. The fuse is based on the fact that after the current exceeds the specified value for a period of time, the heat generated by itself melts the melt and disconnects the circuit. It is a current protector made by using this principle. Fuses are widely used in high and low voltage power distribution systems and control systems, as well as electrical equipment. As short circuit and overcurrent protectors, fuses are one of the most commonly used protection devices. [0003] The SPD backup protector widely used in current circuit lightning protection uses the micro-break switch structure to solve the technical problems ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H85/06H01H85/47
CPCH01H85/06H01H85/47
Inventor 李欣李博琛李柏林陈荣斌
Owner XIAMEN TAIHANG TECH
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