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A surge protector varistor deterioration warning circuit and device

A technology of surge protector and varistor, which is used in measuring devices, instruments, measuring electricity, etc., can solve problems such as low reliability and no indication function, and achieve the effect of high standard reliability

Active Publication Date: 2018-04-27
深圳市威尔利实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a varistor degradation early warning circuit for a surge protector, aiming to solve the problem of low reliability of sampling the temperature of a varistor in the existing surge protector to judge its degree of deterioration, and the problem of The problem of designing multiple matrix loops to reduce the energy required for the failure of the piezoresistor MOV but does not have the indication function

Method used

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  • A surge protector varistor deterioration warning circuit and device
  • A surge protector varistor deterioration warning circuit and device

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0030] The specific realization of the present invention is described in detail below in conjunction with specific embodiment:

[0031] figure 1 The module structure of the surge protector varistor degradation warning circuit provided by the embodiment of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are listed, and the details are as follows:

[0032] Such as figure 1 As shown, the surge protector varistor deterioration warning circuit 100 provided by the embodiment of the present invention is connected to th...

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Abstract

The invention belongs to the field of surge protectors and provides a surge protector varistor deterioration warning circuit and device. In the present invention, the rectification and filtering module filters out the interference signal in the alternating current and provides a stable direct current to drive the early warning indicator module to work, and the early warning control module controls the indication state of the early warning indicator module to change according to the change of the piezoresistor output current, In the present invention, the indication of deterioration of the varistor of the surge protector is provided, and the reliability of the criterion for judging the deterioration is higher according to the current output characteristics of the varistor.

Description

technical field [0001] The invention belongs to the field of surge protectors, in particular to a surge protector varistor deterioration warning circuit and device. Background technique [0002] With the development of information technology, the demand for lightning protection is increasing, and surge protectors are widely used in important places such as buildings. It is easy to deteriorate and cause frequent fire accidents. [0003] In order to prevent safety accidents caused by the deterioration of the varistor MOV, domestic manufacturers of surge protectors indicate the deterioration state of the varistor MOV, and replace the surge protector or varistor MOV in time to prevent accidents. The first indicator of the deterioration of the varistor MOV: the leakage current and the discharge channel are in the same circuit, and there is a technical bottleneck. Some manufacturers use the method of collecting and analyzing the heating temperature of the varistor MOV to indicate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 沈能文
Owner 深圳市威尔利实业有限公司