Primary protection low residual voltage lightning protection module

Abstract

The utility model discloses a primary protection low residual voltage lightning protection module, and relates to the technical field of circuit protection. The gas discharge circuit comprises a first temperature fuse F1, a second temperature fuse F2 and a gas discharge tube GDT1, a second piezoresistor MOV2 is connected between the first temperature fuse F1 and the gas discharge tube GDT1, and a third piezoresistor MOV3 is connected between the second temperature fuse F2 and the gas discharge tube GDT1. A first voltage dependent resistor MOV1 and a semiconductor discharge tube TSS1 are sequentially connected between the first temperature fuse F1 and the second voltage dependent resistor MOV2 and between the second temperature fuse F2 and the third voltage dependent resistor MOV3. According to the utility model, the temperature fuse can be disconnected under the condition that the surface temperature rises when the piezoresistor MOV1 or the semiconductor discharge tube TSS1 fails, so that the lightning protection function is realized, the lightning protection effect is good, and electric equipment can be better protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit protection, in particular to a first-level protection low residual voltage lightning protection module. Background Art

[0002] With the widespread use of electronic devices, damage to systems and equipment caused by lightning overvoltage and electromagnetic pulses (EMPs) is increasing. When external interference suddenly generates a spike in current or voltage in an electrical circuit or communication line, devices equipped with lightning arresters (SPDs) can conduct and shunt the current in a very short time, preventing the surge from damaging other devices in the circuit.

[0003] However, current lightning protectors mainly work in parallel in the circuit, but the residual voltage of general lightning protectors is too high, which will also cause impact and damage to the equipment when struck by lightning. Utility Model Content

[0004] The utility model provides a first-level protection low residual voltage lightning protection module, which is used to effectively solve the problem of excessively high residual voltage of existing lightning protectors.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The utility model is a first-level protection low residual voltage lightning protection module, comprising a first thermal fuse F1 connected between the live wire input terminal Lin and the live wire output terminal Lout, a second thermal fuse F2 connected between the neutral wire input terminal Nin and the neutral wire output terminal Nout, and a gas discharge tube GDT1 connected between the ground wire input terminal Gin and the ground wire output terminal Gout;

[0007] A second varistor MOV2 is connected between the first temperature fuse F1 and the gas discharge tube GDT1, a third varistor MOV3 is connected between the second temperature fuse F2 and the gas discharge tube GDT1, and the first varistor MOV1 and the semiconductor discharge tube TSS1 are connected in sequence between the first temperature fuse F1 and the second varistor MOV2 and between the second temperature fuse F2 and the third varistor MOV3.

[0008] Furthermore, the first temperature fuse F1, the second temperature fuse F2, the first varistor MOV1, the second varistor MOV2, the third varistor MOV3, the gas discharge tube GDT1, and the semiconductor discharge tube TSS1 are all arranged on a PCB board.

[0009] Furthermore, the PCB board is built into a shell, the shell is filled with waterproof glue, and the PCB board is embedded in the waterproof glue.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] This technical solution mainly consists of differential mode protection and common mode protection. The differential mode protection consists of varistor MOV1 and semiconductor discharge tube TSS1, and the common mode protection consists of varistor MOV2, varistor MOV3 and air discharge tube GDT1. Differential mode protection is a surge absorption protection through varistor MOV1 and semiconductor discharge tube TSS1, which obtains a very low residual voltage, thereby realizing the low residual voltage protection function of lightning strike, with good lightning protection effect and better protection of electrical equipment.

[0012] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 This is a structural diagram of a first-level protection low residual voltage lightning protection module of the utility model. DETAILED DESCRIPTION

[0015] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] In the description of the present invention, it should be understood that the terms "input end", "output end", "between", "in sequence", "inside", etc., which indicate directions or positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0017] See also Figure 1As shown, the utility model is a first-level protection low residual voltage lightning protection module, including a first thermal fuse F1 connected between the live wire input terminal Lin and the live wire output terminal Lout, a second thermal fuse F2 connected between the neutral wire input terminal Nin and the neutral wire output terminal Nout, and a gas discharge tube GDT1 connected between the ground wire input terminal Gin and the ground wire output terminal Gout; the first thermal fuse F1 and the second thermal fuse F2 are both alloy-type;

[0018] A second varistor MOV2 is connected between the first temperature fuse F1 and the gas discharge tube GDT1, a third varistor MOV3 is connected between the second temperature fuse F2 and the gas discharge tube GDT1, and the first varistor MOV1 and the semiconductor discharge tube TSS1 are connected in sequence between the first temperature fuse F1 and the second varistor MOV2 and between the second temperature fuse F2 and the third varistor MOV3.

[0019] Among them, the first temperature fuse F1, the second temperature fuse F2, the first varistor MOV1, the second varistor MOV2, the third varistor MOV3, the gas discharge tube GDT1, and the semiconductor discharge tube TSS1 are all arranged on the PCB board ( Figure 1 not shown).

[0020] The PCB board is built into a shell, the shell is filled with waterproof glue, and the PCB board is embedded in the waterproof glue.

[0021] The present invention mainly comprises differential mode protection and common mode protection. The differential mode protection comprises a first varistor MOV1 and a semiconductor discharge tube TSS1, and the common mode protection comprises a second varistor MOV2, a third varistor MOV3 and a gas discharge tube GDT1. The differential mode protection is a surge absorption protection through the first varistor MOV1 and the semiconductor discharge tube TSS1, obtaining a very low residual voltage (approximately 650 volts), thereby achieving a low residual voltage protection function against lightning strikes, having a good lightning protection effect, and being able to better protect electrical equipment. The thermal fuse of the present invention is disconnected when the surface temperature of the varistor MOV1 or the semiconductor discharge tube TSS1 rises due to failure, thereby achieving a lightning protection function, having a good lightning protection effect, and being able to better protect electrical equipment.

[0022] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A first-level protection low residual voltage lightning protection module, characterized in that: It includes a first temperature fuse F1 connected between the live wire input terminal Lin and the live wire output terminal Lout, a second temperature fuse F2 connected between the neutral wire input terminal Nin and the neutral wire output terminal Nout, and a gas discharge tube GDT1 connected between the ground wire input terminal Gin and the ground wire output terminal Gout; A second varistor MOV2 is connected between the first temperature fuse F1 and the gas discharge tube GDT1, a third varistor MOV3 is connected between the second temperature fuse F2 and the gas discharge tube GDT1, and the first varistor MOV1 and the semiconductor discharge tube TSS1 are connected in sequence between the first temperature fuse F1 and the second varistor MOV2 and between the second temperature fuse F2 and the third varistor MOV3.

2. A first-level protection low residual voltage lightning protection module according to claim 1, characterized in that: The first temperature fuse F1, the second temperature fuse F2, the first varistor MOV1, the second varistor MOV2, the third varistor MOV3, the gas discharge tube GDT1, and the semiconductor discharge tube TSS1 are all arranged on the PCB board.

3. A first-level protection low residual voltage lightning protection module according to claim 2, characterized in that: The PCB board is built into a shell, the shell is filled with waterproof glue, and the PCB board is embedded in the waterproof glue.

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