CN115347543A - Surge protector for series discharge gap of piezoresistor of low-voltage system - Google Patents

Surge protector for series discharge gap of piezoresistor of low-voltage system Download PDF

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Publication number
CN115347543A
CN115347543A CN202211007720.1A CN202211007720A CN115347543A CN 115347543 A CN115347543 A CN 115347543A CN 202211007720 A CN202211007720 A CN 202211007720A CN 115347543 A CN115347543 A CN 115347543A
Authority
CN
China
Prior art keywords
discharge gap
low
surge protector
voltage
piezo
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211007720.1A
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Chinese (zh)
Inventor
曾文阳
刘道万
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Techwin Lightning Technologies Co ltd
Original Assignee
Shenzhen Techwin Lightning Technologies Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Techwin Lightning Technologies Co ltd filed Critical Shenzhen Techwin Lightning Technologies Co ltd
Priority to CN202211007720.1A priority Critical patent/CN115347543A/en
Publication of CN115347543A publication Critical patent/CN115347543A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/044—Physical layout, materials not provided for elsewhere
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/144—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors the terminals or tapping points being welded or soldered
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage

Abstract

The invention discloses a surge protector for series connection of piezoresistors of a low-voltage system with a discharge gap, which comprises a body, wherein the body comprises: the module comprises a piezoresistor, an inner module box, a shielding swing rod, a low-temperature tripping insertion piece, a spring, an insulation piece, an electrode insertion piece, a gap fixing piece and an outer module box. The invention has the beneficial effects that: the discharge gap has the characteristics of long service life, low residual voltage, high reliability and convenience in processing, all parts in the discharge gap are assembled at normal temperature, heating welding is not needed, thermal damage is avoided, the installation is simple and rapid, the discharge gap is suitable for mechanical production, the cost is low, and the discharge gap has great economic use value; the surge protector with the piezoresistor connected in series with the discharge gap does not bear power frequency voltage (gap isolation) in work, does not generate power frequency follow current (piezoresistor effect), only acts on the surge voltage, does not have voltage aging on a piezoresistor chip, can realize high-conduction voltage and low residual voltage, and can more effectively protect insulated aged electric.

Description

Surge protector for series discharge gap of piezoresistor of low-voltage system
Technical Field
The invention relates to the technical field of surge protectors, in particular to a surge protector with piezoresistors of a low-voltage system connected in series with a discharge gap.
Background
A. The B, C and D stage power supply surge protector is generally applied to some expensive equipment or equipment circuits of some important application occasions, the protection can adopt single-stage protection or multi-stage protection, and the surge protector is generally arranged at the front end of the equipment. The working principle is as follows: at the moment of overcurrent in a working circuit or for a short time of continuous overcurrent, the power supply surge protector discharges the overcurrent in the circuit to the ground by utilizing the characteristics of the power supply surge protector, so that the current in the circuit is normal, and the normal operation of equipment is ensured. The prior art generally adopts two modes: the first is to connect the zinc oxide varistor chip module in parallel on the protected main circuit, the second is to connect the zinc oxide varistor chip series discharge tube in parallel on the protected main circuit; the first mode is leakage, so that the aging of the product is accelerated in practical application, and the service life of the product is shortened; the second one has the characteristics of no leakage, long service life and low residual pressure, but has the problems of high cost, high processing difficulty and the like, and has poor economic use value.
Accordingly, the prior art is deficient and needs improvement.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the surge protector with the series connection of the piezoresistors of the low-voltage system and the discharge gap, which has the characteristics of long service life, low residual voltage, high reliability, convenience in processing and assembling and the like.
The technical scheme of the invention is as follows: the invention provides a surge protector for series connection of a piezoresistor of a low-voltage system with a discharge gap, which comprises a body, wherein the body comprises: box in piezo-resistor, the module, shelter from pendulum rod, low temperature dropout inserted sheet, spring, insulating piece, electrode inserted sheet, clearance mounting and the outer box of module, piezo-resistor sets up box in the module, piezo-resistor includes piezo-resistor low temperature dropout welding point and piezo-resistor high temperature end pole piece, it is in to shelter from the pendulum rod setting box in the module, low temperature dropout inserted sheet sets up box department in the module and with piezo-resistor's piezo-resistor low temperature dropout welding point passes through the soldering of low temperature and fixes, the one end of spring is fixed mutually with the box in the module, and the other end is connected shelter from the pendulum rod, the spring is in tensile state and pulling shelter from the pendulum rod, shelter from the pendulum plate quilt the low temperature dropout inserted sheet blocks, the electrode inserted sheet is located the box in the module corresponds piezo-resistor high temperature end pole piece sets up, the insulating piece is located between electrode inserted sheet and the piezo-resistor high temperature end pole piece, be equipped with the trompil on the insulating piece, the clearance includes an inserted sheet, be used for fixing electrode inserted sheet, insulating piece, outer box cover is in the module on the box, be equipped with transparent window piece on the module.
Furthermore, the surge protector also comprises a base, and the body is arranged on the base and electrically connected with the base.
Further, the base includes base left side shell, base right side shell, first terminal subassembly and second terminal subassembly, base left side shell with base right side shell installation forms the base shell, first terminal subassembly and second terminal subassembly set up on the base shell and be used for realizing the outside with the electric connection of body.
Furthermore, the insulating sheet is made of one or a combination of polytetrafluoroethylene, nomi paper, teflon, mica, grey paper, bakelite and epoxy board.
Further, the thickness of the insulation sheet is 0.1mm-2mm.
Further, the total area of the openings of the insulation sheet is 0.2mm 2 -16mm 2 The number of the openings is one, two or more.
Further, the open holes are round holes, square holes and/or irregular holes.
Furthermore, the material of the pressure-sensitive high-temperature end electrode piece and the electrode inserting piece is copper, and the thickness of the pressure-sensitive high-temperature end electrode piece and the thickness of the electrode inserting piece are both 0.2 mm-2mm.
By adopting the scheme, the invention has the beneficial effects that: the discharge gap has the characteristics of long service life, low residual voltage, high reliability and convenience in processing, all parts in the discharge gap are assembled at normal temperature, heating welding is not needed, thermal damage is avoided, the installation is simple and rapid, the discharge gap is suitable for mechanical production, the cost is low, and the discharge gap has great economic use value; the surge protector with the piezoresistor connected in series with the discharge gap does not bear power frequency voltage (gap isolation) in work, does not generate power frequency follow current (piezoresistor effect), only acts on the surge voltage, does not have voltage aging on a piezoresistor chip, can realize high-conduction voltage and low residual voltage, and can more effectively protect insulated aged electric.
Drawings
Fig. 1 is an exploded view of the surge protector of the present invention.
Fig. 2 is an exploded view of a varistor, an electrode tab, an insulating sheet, and a gap securing member according to the present invention.
Fig. 3 is a schematic structural diagram of the insulating sheet of the present invention after being mounted.
FIG. 4 is a schematic view of the gap fastener of the present invention after installation.
Fig. 5 is a schematic structural view of the body and the bottom case of the present invention.
FIG. 6 is a structural diagram of a surge protector of the present invention
Fig. 7 is a schematic view of a 5P surge protector of the present invention.
Fig. 8 is an equivalent circuit diagram of the surge protector of the present invention.
Fig. 9A to 9D are equivalent circuit diagrams of usage states of the surge protector of some embodiments of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Referring to fig. 1 to 9D, in the present embodiment, the invention provides a surge protector with a low-voltage system varistor connected in series with a discharge gap, the surge protector includes: box 3 in piezo-resistor 1, the module, shelter from pendulum rod 4, low temperature dropout inserted sheet 5, spring 6, insulating piece 8, electrode inserted sheet 9, gap mounting 10 and the outer box 11 of module, piezo-resistor 1 sets up box 3 in the module, piezo-resistor 1 includes piezo-resistor low temperature dropout welding point 2 and pressure-sensitive high temperature end electrode piece 7, shelter from the setting of pendulum rod 4 on the box 3 in the module, low temperature dropout inserted sheet 5 sets up in the module box 3 department and with piezo-resistor 1's pressure-sensitive low temperature dropout welding point 2 is fixed through the low temperature welding tin welding, spring 6's one end is fixed mutually with box 3 in the module, and the other end is connected shelter from pendulum rod 4, spring 6 is in tensile state and pulling shelter from pendulum rod 4, shelter from the pendulum plate quilt low temperature dropout inserted sheet 5 blocks, electrode inserted sheet 9 locates in the module box 3 and correspond pressure-sensitive high temperature end electrode piece 7 sets up, insulating piece 8 is located between electrode 9 and the high temperature end electrode piece 7, be equipped with the trompil on the insulating piece 8, the fixed slot 10 includes a fixed slot, the insulating piece, pressure-resistor insulating piece 9 and the high temperature end electrode piece is used for the fixed box is embedded in the module is suitable for the high temperature end electrode piece 11 block and the high temperature end electrode piece 11 block is used for the high temperature end electrode piece 11 block. This scheme is because insulating piece 8's existence makes electrode inserted sheet 9 with there is the discharge gap between the voltage-sensitive high temperature end electrode piece 7, because voltage-sensitive high temperature end electrode piece 7 and voltage-sensitive low temperature dropout welding point 2 do two links of piezo-resistor 1 make consequently piezo-resistor 1 in the body with the discharge gap is concatenated.
Further, the surge protector further comprises a base 12, the body is arranged on the base 12 and electrically connected with the base 12, and the specific implementation form can be that the electrode insertion sheet 9 and the low-temperature tripping insertion sheet 5 on the body are electrically connected with a terminal component on the base 12. The bottom of the base 1213 is provided with a mounting structure which can be mounted on a track, so that the surge protector can be conveniently mounted. Under different embodiments, one base 12 of the scheme can be correspondingly provided with one surge protector body, and one base 12 can also correspond to two or more surge protector bodies.
Further, the base 12 comprises a base left shell 12-1, a base right shell 12-4, a first terminal assembly 12-2 and a second terminal assembly 12-3, the base left shell 12-1 and the base right shell 12-4 are installed to form the base outer shell, and the first terminal assembly 12-2 and the second terminal assembly 12-3 are arranged on the base outer shell and are used for achieving electrical connection between the outside and the body.
Furthermore, still can set up on the body and distinguish the round pin, can correspond on the base 12 distinguish the round pin and set up the jack, can be in the assembly the body with play the effect of preventing staying when base 12.
Further, the insulating sheet 8 is made of a high temperature resistant material, and can be made of one or a combination of several of polytetrafluoroethylene, nominated paper, teflon, mica, grey paper, bakelite and epoxy board within a temperature range of 150 ℃ to 1000 ℃.
Further, the thickness of the insulation sheet 8 is 0.1mm-2mm.
Further, the total area of the openings of the insulating sheet 8 is 0.2mm 2 -16mm 2 . The number of openings may be one, two or more. The openings may be round, square and/or irregular. In this embodiment, the insulating sheet 8 has one opening and is shaped as a circular hole.
Furthermore, the pressure-sensitive high-temperature terminal plate 7 and the electrode inserting sheet 9 are both made of copper, and the thickness of the electrode inserting sheet is 0.2 mm-2mm.
Referring to fig. 1 to 6, the surge protector of the present embodiment can be assembled by the following steps: the piezoresistor 1 is arranged in the module inner box 3; the shielding swing rod 4 is arranged in the module inner box 3; the low-temperature tripping inserting sheet 5 is arranged in the module inner box 3, and the low-temperature tripping inserting sheet 5 and the pressure-sensitive low-temperature tripping welding point 2 are welded and fixed; a spring 6 is arranged in the shielding swing rod 4, so that the spring 6 pulls the shielding swing rod; an electrode inserting sheet 9 is arranged in the electrode, and an insulating sheet 8 is arranged between the electrode inserting sheet 9 and the pressure-sensitive high-temperature end electrode sheet 7; the gap fixing part 10 is arranged for fixing the electrode inserting sheet 9, the insulating sheet 8 and the pressure-sensitive high-temperature terminal pole piece 7; sleeving the module outer box 11 on the module inner box 3; and installing the body on the base 12 to obtain the surge protector.
Referring to fig. 6 and 7, fig. 6 is a structural diagram of a one-piece (1P) wave protector according to the present embodiment, and fig. 7 is a structural diagram of a five-piece (5P) surge protector according to the present embodiment. The surge protector of this scheme can select the surge protector of different quantity types according to the in-service use needs, for example 2P or 3P can be single-phase power surge protection, and 3P to 5P can be three-phase power surge protection.
Referring to fig. 8, the equivalent circuit of the surge protector of the present embodiment is formed by connecting the discharge gap and the varistor in series. Referring to fig. 9A to 9D in combination, fig. 9A to 9D respectively show equivalent circuit diagrams of the surge protector in a working state according to some embodiments, where L is a live wire, N is a zero wire, and PE is a ground wire.
Referring to fig. 1 to 9D, when the surge protector of the present embodiment works, when the soldering tin of the low-temperature trip insertion sheet 5 and the pressure-sensitive low-temperature trip welding point 2 is melted, the low-temperature trip insertion sheet 5 and the pressure-sensitive low-temperature trip welding point 2 are disconnected, the surge protector is broken, the shielding swing plate is pulled under the action of the spring 6, and the state of failure of the surge protector can be observed through the window sheet.
In conclusion, the beneficial effects of the invention are as follows: the discharge gap has the characteristics of long service life, low residual voltage, high reliability and convenience in processing, all parts in the discharge gap are assembled at normal temperature, heating welding is not needed, thermal damage is avoided, the installation is simple and rapid, the discharge gap is suitable for mechanical production, the cost is low, and the discharge gap has great economic use value; the surge protector with the piezoresistor connected in series with the discharge gap does not bear power frequency voltage (gap isolation) in work, does not generate power frequency follow current (piezoresistor effect), only acts on the surge voltage, does not have voltage aging on a piezoresistor chip, can realize high-conduction voltage and low residual voltage, and can more effectively protect insulated aged electric.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a surge protector of low pressure system piezo-resistor concatenates discharge gap which characterized in that, includes the body, the body includes: box in piezo-resistor, the module, shelter from pendulum rod, low temperature dropout inserted sheet, spring, insulating piece, electrode inserted sheet, clearance mounting and the outer box of module, piezo-resistor sets up box in the module, piezo-resistor includes piezo-resistor low temperature dropout welding point and piezo-resistor high temperature end pole piece, it is in to shelter from the pendulum rod setting box in the module, low temperature dropout inserted sheet sets up box department in the module and with piezo-resistor's piezo-resistor low temperature dropout welding point passes through the soldering of low temperature and fixes, the one end of spring is fixed mutually with the box in the module, and the other end is connected shelter from the pendulum rod, the spring is in tensile state and pulling shelter from the pendulum rod, shelter from the pendulum plate quilt the low temperature dropout inserted sheet blocks, the electrode inserted sheet is located the box in the module corresponds piezo-resistor high temperature end pole piece sets up, the insulating piece is located between electrode inserted sheet and the piezo-resistor high temperature end pole piece, be equipped with the trompil on the insulating piece, the clearance includes an inserted sheet, be used for fixing electrode inserted sheet, insulating piece, outer box cover is in the module on the box, be equipped with transparent window piece on the module.
2. The surge protector for series discharge gap of low-voltage system piezoresistors according to claim 1, further comprising a base, wherein the body is arranged on the base and electrically connected with the base.
3. The surge protector with series discharge gap of piezoresistors for low-voltage system as claimed in claim 2, wherein said base comprises a left base shell, a right base shell, a first terminal assembly and a second terminal assembly, said left base shell and said right base shell are installed to form said base housing, said first terminal assembly and said second terminal assembly are disposed on said base housing and are used for realizing the electrical connection between the exterior and said body.
4. The surge protector for series connection of voltage dependent resistors with discharge gap according to any one of claims 1 to 3, wherein the insulating sheet is made of one or more of polytetrafluoroethylene, nomex paper, teflon, mica, grey paper, bakelite, and epoxy board.
5. A surge protector with series discharge gap of voltage dependent resistors for low voltage system according to any of claims 1 to 3, wherein the thickness of the insulating sheet is 0.1mm-2mm.
6. A surge protector with series discharge gap of voltage dependent resistors for low voltage system according to any of claims 1 to 3, wherein the total area of the openings of the insulating sheet is 0.2mm 2 -16mm 2 The number of the openings is one, two or more.
7. The surge protector with series discharge gap of low-voltage system piezoresistors according to claim 6, wherein the openings are round holes, square holes and/or irregular holes.
8. The surge protector for the series discharge gap of the low-voltage system piezoresistor according to any one of claims 1 to 3, wherein the material of the voltage-sensitive high-temperature terminal plate and the material of the electrode insert are both copper, and the thickness of the voltage-sensitive high-temperature terminal plate and the thickness of the electrode insert are both 0.2mm to 2mm.
CN202211007720.1A 2022-08-22 2022-08-22 Surge protector for series discharge gap of piezoresistor of low-voltage system Pending CN115347543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211007720.1A CN115347543A (en) 2022-08-22 2022-08-22 Surge protector for series discharge gap of piezoresistor of low-voltage system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211007720.1A CN115347543A (en) 2022-08-22 2022-08-22 Surge protector for series discharge gap of piezoresistor of low-voltage system

Publications (1)

Publication Number Publication Date
CN115347543A true CN115347543A (en) 2022-11-15

Family

ID=83953202

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211007720.1A Pending CN115347543A (en) 2022-08-22 2022-08-22 Surge protector for series discharge gap of piezoresistor of low-voltage system

Country Status (1)

Country Link
CN (1) CN115347543A (en)

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