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Surge protection circuit

A surge protection and circuit technology, applied in emergency protection circuit devices, circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve the difficulty of surge protection circuits to meet the requirements of lightning surge protection Safety and voltage resistance and other issues, to achieve the effect of satisfying lightning surge protection, strong surge absorption capacity and high reliability

Pending Publication Date: 2018-11-06
深圳茂硕电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention proposes a surge protection circuit, which aims to solve the problem that the existing surge protection circuit is difficult to meet the requirements of lightning surge protection and safety withstand voltage at the same time

Method used

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Embodiment Construction

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention, and similar component numbers in the drawings represent similar components. Apparently, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0026] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude one or Presence or addition of multiple other features, integers, steps, operations, elements, components and / or col...

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Abstract

The embodiment of the invention discloses a surge protection circuit, which comprises a differential mode surge protection unit and a common mode surge protection unit. The differential mode surge protection unit is respectively connected with a fire line and a neutral line. The common-mode surge protection unit comprises a varistor unit and a solid-state discharge tube unit. The varistor unit isrespectively connected with the fire line and the neutral line, and the solid discharge tube unit is connected with the varistor unit and grounded. The solid state discharge tube unit includes at least one solid state discharge tube. Compared with gas discharge tubes, the solid state discharge tube has accurate conduction, fast response, strong surge absorption capacity, bidirectional symmetry andhigh reliability, makes the response time of the solid state discharge tube reach the nanosecond level, and the residual voltage is very small. Therefore, the solid state discharge tube with large discharge voltage can be selected to meet the voltage withstanding requirements and ensure that the residual voltage of the solid state discharge tube is small to meet the requirements of lightning surge protection.

Description

technical field [0001] The invention relates to the technical field of surge protection, in particular to a surge protection circuit. Background technique [0002] Surge (Electrical surge), also called surge, refers to the instantaneous overvoltage on electrical equipment that exceeds the normal operating voltage. Essentially, a surge is a violent pulse that occurs in mere millionths of a second. The reasons for the surge include internal reasons, such as the start-stop and failure of electrical equipment, and external reasons such as lightning. [0003] In the outdoor environment, natural phenomena such as lightning often occur. Therefore, generally speaking, switching power supplies and LED drive power supplies arranged outdoors are equipped with surge protection circuits. In the prior art, a gas discharge tube is usually selected as a protection device for a surge protection circuit. Due to the high residual voltage of the gas discharge tube, in order to meet the requ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/00H02H9/06
CPCH02H9/005H02H9/06
Inventor 刘建铨张杨王华轶王畅邓勇丁华周惠斌
Owner 深圳茂硕电子科技有限公司
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