Overvoltage protection device

A protection device and overvoltage technology, applied in the direction of overvoltage protection resistors, varistors, etc., can solve the risk of increasing the electric power and arc of the welding part, affecting the reliability, safety and service life of SPD, and affecting the solder connection Strength and other issues

Active Publication Date: 2012-01-25
SCHNEIDER ELECTRIC IND SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a design has at least the following disadvantages: During normal use, since the static electrode is closer to the main surface of the MOV, the heat generated on the main surface of the MOV will be easily conducted or radiated to the static electrode, and then transferred to the static electrode and the moving electrode. between the low temperature solder, t

Method used

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Embodiment Construction

[0025] Embodiments of the present invention will be described below with reference to the accompanying drawings.

[0026] figure 1A schematic diagram showing the appearance of the SPD according to the embodiment of the present invention. As shown in the figure, as a compact model, the SPD of the embodiment of the present invention is roughly in the shape of a cuboid, the housing cover 12 covers the parts of the SPD, and the cover plate 11 is a transparent window through which the Observe the internal SPD status. It should be noted that the SPD of the embodiment of the present invention is not limited to the illustrated cuboid shape.

[0027] refer to figure 2 , to describe the main components and working principle of the SPD according to the embodiment of the present invention. like figure 1 As shown, the overvoltage protection device includes: a casing 3 ; an MOV 5 inside the casing 3 , the MOV is a metal oxide varistor; a static electrode 15 connected to the MOV; and a...

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PUM

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Abstract

The invention relates to an overvoltage protection device, which comprises a shell,, a moving electrode and a fixed electrode, wherein a metal oxide voltage-dependent resistor which is arranged in the shell is provided with two opposite main body surfaces and four side surfaces, and the area of each main body surface is larger than the area of any side surface; one end of the moving electrode is installed on the shell; and one end of the fixed electrode is connected with the metal oxide voltage-dependent resistor and the other end of the fixed electrode is connected with the other end of the moving electrode through welding. The fixed electrode is arranged relative to the metal oxide voltage-dependent resistor and on the projection formed by the main body surface perpendicular to the metal oxide voltage-dependent resistor. One end of the fixed electrode which is connected with the moving electrode is arranged outside the main body surface. A welded part between the fixed electrode and the moving electrode is not adversely affected by the heating up of a metal oxide varistor (MOV).

Description

technical field [0001] The present invention relates to a circuit protection device, more particularly, to an overvoltage protection device. Background technique [0002] With the promulgation and implementation of a series of national standards GB18802.1-2002, GB50057, GA173 and other standards, the lightning protection regulations in various places are becoming more and more perfect, and the application of overvoltage protection devices, also known as surge protectors (SPDs), is increasing. more popular. The overvoltage protection device can protect the load in the circuit so that it can withstand the impact of instantaneous overvoltage or lightning current. More specifically, the overvoltage protection device is generally connected in parallel with the load and installed upstream of the load. When the circuit is operating normally, the overvoltage protection device is in a high-impedance state, which does not affect the normal operation of the load; or lightning current...

Claims

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Application Information

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IPC IPC(8): H01C7/12
Inventor 邓雪梅耿济栋
Owner SCHNEIDER ELECTRIC IND SAS
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