Current overload protection switch with lightning protection function

Abstract

Provided is a current overload protection switch with a lightning protection function. According to the switch, an overcurrent protection switch is regarded as the main body, a voltage overload protection device is ingeniously arranged in the inner space of the overcurrent protection switch, a wiring lug is employed, and the wiring lug comprises an extension portion extending out of a shell and a moving motion positioned in the shell; a voltage overload protection element is formed by a varistor and a temperature-sensitive column with the insulation characteristic and attached to one side of the moving portion; and a spring is arranged at the other side of the moving portion and provides an elastic force abutted against the direction of the temperature-sensitive column. Therefore, when an instantaneous high voltage reaches the varistor, the temperature of the varistor instantaneously rises and is higher than the melting temperature of the temperature-sensitive column, the temperature-sensitive column has direct and large-area contact, more rapid and dense thermal conduction effect is achieved, the temperature-sensitive column instantaneously melts, a supporting force at the corresponding side of the spring disappears, the motion at each time is guaranteed to be successful, rapid power-off can be realized when the varistor does not rise to the high temperature, and electrical safety is realized.

Description

technical field [0001] The present invention relates to a current overload protection switch with lightning protection function, especially a current overload protection switch with a built-in voltage overload protection device. The combined heat conduction effect can ensure that the operation can be successful every time and the structure can be quickly powered off before reaching the high temperature. Background technique [0002] Figure 1A and Figure 1B An existing overload protection switch 10 is disclosed, which generally includes: a casing 11, a pressure block 12 is arranged at the upper end, and a first connection piece 12a, a second connection piece 12b and a third connection piece are arranged at the bottom end. piece 12c, wherein the first terminal piece 12a is provided with a double metal contact spring 13 and a first contact point 131, and a second contact point 121 is provided above the second terminal piece 12b relative to the first contact point; A link me...

AI Technical Summary

Problems solved by technology

[0010] However, the above lightning protection and anti-surge structures are not only difficult to ensure quality, high temperature danger, and slow response, but also have the limitations of too large volume and too complicated components, so more space and assembly processes are required. It can only be implemented externally and independently from the outside of the switch, and cannot be built into the switch, so there is still room for improvement

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