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Over-voltage protection device

A protection device and overvoltage technology, applied in the direction of overvoltage protection resistors, varistors, etc., can solve problems such as welding inconvenience, increased electric power and arc risk in welding parts, and air holes

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, thus affecting the joint strength of the solder
However, face-to-face welding is not only inconvenient, but also easily causes air holes and virtual welding.
Porosity and / or virtual welding will increase the risk of electric power and arcing in the weld, which will cause the above-mentioned disadvantages that affect the reliability, safety and service life of the SPD

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 discloses an over-voltage protection device, comprising a shell, a metal oxide piezoresistor in the shell, a movable electrode and a static electrode, wherein one end of the movable electrode is installed on the shell, one end of the static electrode is connected with the metal oxide piezoresistor, the other end of the static electrode is connected with the other end of the movable electrode by soldering, and the end of the static electrode, connected with the movable electrode, and the movable electrode are soldered in an inclined angle manner so as to realize vertically crosswise soldering. The soldering manner provided by the invention is beneficial to overcoming of the defects of false soldering, air holes and the like caused by face-to-face soldering of the movable and static electrodes of traditional over-voltage protection devices.

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 耿济栋邓雪梅
Owner SCHNEIDER ELECTRIC IND SAS
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