CN115693625A - Surge protector with strong follow current interruption capacity and no leakage current - Google Patents
Surge protector with strong follow current interruption capacity and no leakage current Download PDFInfo
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- CN115693625A CN115693625A CN202211433620.5A CN202211433620A CN115693625A CN 115693625 A CN115693625 A CN 115693625A CN 202211433620 A CN202211433620 A CN 202211433620A CN 115693625 A CN115693625 A CN 115693625A
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Abstract
The invention discloses a surge protector with strong follow current interruption capability and no leakage current, which comprises: casing subassembly, many clearance core subassembly, terminal subassembly and power indication subassembly, many clearance core subassembly, power indication subassembly and terminal subassembly are all located in the casing subassembly forms the accommodation space, many clearance core subassembly includes: two electrodes, the fixed unit of plastic, a plurality of graphite flake, a plurality of clearance piece and starting circuit subassembly, graphite flake and clearance piece are stacked up in proper order and are set up just clearance piece both sides all have the graphite flake, graphite flake and clearance piece set up the fixed unit department of plastic, two the electrode sets up respectively the both sides of the fixed unit of plastic. The invention has the beneficial effects that: the miniaturization of the product can be realized, and the thickness of the single sheet can be 18mm; the valve has the characteristics of long service life, large flow rate, low residual pressure, strong follow current interruption capability and no leakage.
Description
Technical Field
The invention relates to the technical field of surge protectors, in particular to a surge protector which is high in follow current breaking capacity and free of leakage current.
Background
A. The B, C, D stage power supply surge protector is generally applied to some expensive equipment or equipment circuits of some important application occasions, the protection can be 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: when the working circuit is over-current, the power surge protector discharges the over-current to the ground by using the characteristics of the power surge protector, so that the current in the circuit is normal, and the normal operation of equipment is ensured. The prior art is generally in two ways: the first is to connect the zinc oxide varistor chip module in parallel on the protected main circuit, the second is to superpose the multi-stage 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 type has the characteristics of no leakage, long service life, low residual pressure and weak follow current interruption capability, but has the problems of high cost, high processing difficulty and the like, and has poor economic use value; and under the condition that the flow rate of the products of the two modes is not less than 25kA (10/350 mus) and not less than 100kA (8/20 mus), the product volume is larger, and the second mode is difficult to achieve the parameter of 25kA of follow current interruption capacity, so that the requirement of miniaturization of products in the existing market cannot be met.
Accordingly, the prior art is deficient and needs improvement.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a surge protector which has strong follow current interruption capability and no leakage current, and the follow current interruption capability is not less than 25kA when the power frequency voltage is applied.
The technical scheme of the invention is as follows: the invention provides a surge protector with strong follow current interruption capability and no leakage current, which comprises: casing subassembly, many clearance core subassembly, terminal subassembly and power indication subassembly, many clearance core subassembly, power indication subassembly and terminal subassembly are all located in the casing subassembly forms the accommodation space, many clearance core subassembly includes: the device comprises two electrodes, a plastic fixing unit, a plurality of graphite sheets, a plurality of gap sheets and a starting circuit assembly, wherein the graphite sheets and the gap sheets are sequentially stacked, the graphite sheets are arranged on two sides of the gap sheets, the graphite sheets and the gap sheets are arranged at the plastic fixing unit, the two electrodes are respectively arranged on two sides of the plastic fixing unit, the starting circuit assembly is fixed with the electrodes through fasteners, the power supply indicating assembly is electrically connected with the starting circuit assembly through a lead, the temperature fuse of the power supply indicating assembly is tightly attached to the electrodes, and the two terminal assemblies are respectively electrically connected with the two electrodes of the multi-gap core assembly.
Further, the fixed unit of plastic includes plastic fixed block and lower plastic fixed block, it does not correspond to equally divide on plastic fixed block and the lower plastic fixed block the clearance piece is formed with positioning groove, the clearance piece sets up respectively in corresponding positioning groove department, it does not correspond to equally divide on plastic fixed block and the lower plastic fixed block the graphite flake is formed with positioning platform, the graphite flake set up respectively in corresponding positioning platform department.
Further, the graphite sheet is circular or square in shape.
Further, the graphite sheet has an area of 140mm 2 -350mm 2 。
Further, the graphite sheet has a thickness of 1mm to 5mm.
Further, the gap sheet is made of the following materials: one or a combination of several of polytetrafluoroethylene, nominated paper, teflon, mica, green case paper, bakelite and epoxy board.
Further, the thickness of the gap piece is 0.1mm-2mm.
Further, the number of the openings in the gap piece is one or more than one.
Further, the total area of the openings of the gap piece is 120mm 2 -300mm 2 。
Further, the multi-gap core assembly includes 8-20 sheets of graphite and 7-19 gap sheets.
By adopting the scheme, the invention has the beneficial effects that: the miniaturization of the product can be realized, and the thickness of the single sheet can be 18mm; the multi-gap core component has the characteristics of long service life, large flow, low residual pressure, strong follow current interruption capability and no leakage current, all components of the multi-gap core component are assembled at normal temperature, heating welding is not needed, thermal damage is avoided, the multi-gap core component is simple and rapid to install, is suitable for mechanized production, is low in cost and has great economic use value; the surge protector of the multi-gap core assembly does not bear power frequency voltage (gap isolation) during working, the power frequency follow current interruption capacity is strong, the follow current interruption capacity is not less than 25kA (multiple gap action) when the power frequency voltage is applied, only the surge voltage is acted, voltage aging does not exist, high-conduction voltage low residual voltage can be realized, and more effective protection is carried out on insulating aging electricity.
Drawings
Fig. 1 is a schematic structural view of a surge protector of the present invention.
Fig. 2 is an exploded view of the surge protector of the present invention.
FIG. 3 is an exploded view of the multiple gap core assembly of the present invention.
FIG. 4 is a schematic diagram of a multi-gap core assembly and terminal assembly in accordance with the present invention.
FIG. 5 is a schematic view of the construction of the multiple gap core assembly and terminal assembly of the present invention assembled to a housing assembly.
Fig. 6 is an equivalent circuit diagram of the surge protector of the present invention.
Fig. 7A to 7D are equivalent circuit diagrams in an operating state of the present invention, respectively.
Fig. 8 is a schematic structural view of a 2-piece surge protector assembly 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 8, in this embodiment, the present invention provides a surge protector with strong follow current interruption capability and no leakage current, including: the shell assembly 1, many clearance core pack 2, terminal subassembly 4 and power indication subassembly 3, many clearance core pack 2, power indication subassembly 3 and terminal subassembly 4 all locate in the shell assembly 1 forms the accommodation space, many clearance core pack 2 includes: the device comprises two electrodes 2-1, a plastic fixing unit 2-2, a plurality of graphite sheets 2-4, a plurality of gap sheets 2-5 and a starting circuit component 2-6, wherein the graphite sheets 2-4 and the gap sheets 2-5 are sequentially stacked, the graphite sheets 2-4 are arranged on two sides of the gap sheets 2-5, the graphite sheets 2-4 and the gap sheets 2-5 are arranged at the position of the plastic fixing unit 2-2, the two electrodes 2-1 are respectively arranged on two sides of the plastic fixing unit 2-2, the starting circuit component 2-6 is fixed with the electrodes 2-1 through fasteners, a power supply indicating component 3 is electrically connected with the starting circuit component 2-6 through a conducting wire, a temperature fuse 3-1 of the power supply indicating component 3 is tightly attached to the electrodes 2-1, and the two terminal components 4 are respectively electrically connected with the two electrodes 2-1 of the multi-gap core component 2.
Further, the plastic fixing unit 2-2 comprises an upper plastic fixing block and a lower plastic fixing block, wherein the upper plastic fixing block and the lower plastic fixing block are respectively provided with a positioning groove 2-2-1 corresponding to the gap piece 2-5, the gap pieces 2-5 are respectively arranged at the corresponding positioning grooves 2-2-1, the upper plastic fixing block and the lower plastic fixing block are respectively provided with a positioning platform 2-2-2 corresponding to the graphite sheet 2-4, and the graphite sheet 2-4 is respectively arranged at the corresponding positioning platform 2-2-2.
Specifically, the electrode 2-1 may be made of copper, and may have a thickness of 1mm to 6mm.
Specifically, the graphite sheets 2-4 may be circular or square in shape. The graphite sheets 2-4 have an area of 140mm 2 -350mm 2 . The thickness of the graphite sheets 2-4 is 1mm-5mm. The graphite sheets 2-4 are formed by finely processing graphite with high strength, good conductivity and extremely low resistance.
Specifically, the gap pieces 2 to 5 are made of the following materials: one or a combination of several of polytetrafluoroethylene, nominated paper, teflon, mica, green case paper, bakelite and epoxy board. The thickness of the gap piece 2-5 is 0.1mm-2mm. The number of openings in the gap pieces 2-5 is one or more than one. The shape of the opening in the gap sheets 2-5 can be round hole and squareHoles and/or irregular holes, the total area of the openings of the gap pieces 2-5 being 120mm 2 -300mm 2 。
Specifically, the multi-gap core assembly 2 may include 8-20 sheets of graphite and 7-19 gap sheets 2-5.
Specifically, the plastic fixing unit 2-2 is made of a high-strength plastic material with good thermoplasticity and high temperature resistance. For example, the material may be PA46 plastic, PA66GF30 plastic, PA6GF30 plastic, PBTGF20 plastic, etc. with a flame retardant grade of V0.
Specifically, the starting circuit components 2-6 include a probe, a high voltage capacitor, a circuit board, and the like.
Specifically, the power supply indicating assembly 3 includes: a resistor, a capacitor, a light emitting diode, a lead, a temperature fuse 3-1 and the like.
Please refer to fig. 1 to 5. The surge protector of the scheme can be assembled in the following way: sequentially arranging graphite sheets 2-4, gap sheets 2-5, graphite sheets 2-4 and gap sheets 2-5 on the plastic fixing unit 2-2 to fix the electrode 2-1 with the plastic fixing unit 2-2 through screws 2-3; screwing screws 2-7 onto the electrodes 2-1 of the multi-gap core assembly 2 by electrically crimping the start circuit assembly 2-6; soldering the conducting wire on the indicating circuit component on the starting circuit component 2-6; and screwing a screw 5 on the electrode 2-1 by the terminal assembly 4 by using an electric screwdriver, subsequently loading the obtained product into the shell, loading the product into a riveting copper pipe and pressing the product to obtain the surge protector. When the surge protector works, if a large surge impact is encountered, very large heat can be generated to cause the temperature fuse 3-1 tightly attached to the electrode 2-1 to be switched from normally closed to normally open, the light emitting diode on the power supply indicating assembly 3 is switched from normally on to normally off, the surge protector is damaged, although the surge protector can also play a role in protecting a circuit, the surge protector needs to be replaced as soon as possible, and the surge protector can be observed to be in a failure state through the light emitting diode.
Referring to fig. 6, fig. 6 is an equivalent circuit diagram of the surge protector according to the present embodiment. Referring to fig. 7A to 7D, fig. 7A to 7D are equivalent circuit diagrams of the surge protector according to the present invention in a use state, respectively, where L is a live line, N is a zero line, and PE is a ground line.
Referring to fig. 8, fig. 8 is a structural diagram of a two-piece (2P) 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, 3P to 5P, 10P can be three-phase power surge protection.
In conclusion, the beneficial effects of the invention are as follows: the miniaturization of the product can be realized, and the thickness of the single sheet can be 18mm; the multi-gap core component has the characteristics of long service life, large flow, low residual pressure, strong follow current interruption capability and no leakage current, all components of the multi-gap core component are assembled at normal temperature, heating welding is not needed, thermal damage is avoided, the multi-gap core component is simple and rapid to install, is suitable for mechanized production, is low in cost and has great economic use value; the surge protector of the multi-gap core assembly does not bear power frequency voltage (gap isolation) in work, has strong power frequency follow current interruption capacity (a plurality of gap functions), only acts on the surge voltage, does not have voltage aging, can realize high-breakover voltage low residual voltage, and carries out more effective protection on insulated aging electricity.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A surge protector with strong follow current interruption capability and no leakage current is characterized by comprising: casing subassembly, many clearance core subassembly, terminal subassembly and power indication subassembly, many clearance core subassembly, power indication subassembly and terminal subassembly are all located in the casing subassembly forms the accommodation space, many clearance core subassembly includes: the device comprises two electrodes, a plastic fixing unit, a plurality of graphite sheets, a plurality of gap sheets and a starting circuit component, wherein the graphite sheets and the gap sheets are sequentially stacked and arranged, the graphite sheets are arranged on two sides of the gap sheets, the graphite sheets and the gap sheets are arranged at the position of the plastic fixing unit, the two electrodes are respectively arranged on two sides of the plastic fixing unit, the starting circuit component is fixed with the electrodes through fasteners, the power supply indicating component is electrically connected with the starting circuit component through a lead, the temperature safety of the power supply indicating component is tightly attached to the electrodes, and the two terminal components are respectively electrically connected with the two electrodes of the multi-gap core component.
2. The surge protector with high follow current interruption capability and no leakage current according to claim 1, wherein the plastic fixing unit comprises an upper plastic fixing block and a lower plastic fixing block, positioning grooves are respectively formed on the upper plastic fixing block and the lower plastic fixing block corresponding to the gap pieces, the gap pieces are respectively arranged at the corresponding positioning grooves, the positioning platforms are respectively formed on the upper plastic fixing block and the lower plastic fixing block corresponding to the graphite sheets, and the graphite sheets are respectively arranged at the corresponding positioning platforms.
3. The surge protector with high follow current interruption capability and no leakage current according to claim 1 or 2, wherein the graphite sheet is circular or square in shape.
4. The surge protector with high follow current interruption capability and no leakage current of claim 1 or 2, wherein the graphite sheet has an area of 140mm 2 -350mm 2 。
5. The surge protector with high follow current interruption capability and no leakage current of claim 1 or 2, wherein the graphite sheet has a thickness of 1mm to 5mm.
6. The surge protector with strong follow current interruption capability and no leakage current as claimed in claim 1 or 2, wherein the gap piece is made of: one or a combination of several of polytetrafluoroethylene, nominated paper, teflon, mica, green case paper, bakelite and epoxy board.
7. The surge protector with high follow current interruption capability and no leakage current as claimed in claim 1 or 2, wherein the thickness of the gap piece is 0.1mm-2mm.
8. The surge protector with high follow current interruption capability and no leakage current as claimed in claim 1 or 2, wherein the number of the openings in the gap piece is one or more than one.
9. The surge protector with high follow current interruption capability and no leakage current of claim 8, wherein the total area of the openings of the gap piece is 120mm 2 -300mm 2 。
10. The surge protector with high follow current interruption capability and no leakage current of claim 1 or 2, wherein the multi-gap core assembly comprises 8-20 sheets of graphite and 7-19 gap sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211433620.5A CN115693625A (en) | 2022-11-16 | 2022-11-16 | Surge protector with strong follow current interruption capacity and no leakage current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211433620.5A CN115693625A (en) | 2022-11-16 | 2022-11-16 | Surge protector with strong follow current interruption capacity and no leakage current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115693625A true CN115693625A (en) | 2023-02-03 |
Family
ID=85054128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211433620.5A Pending CN115693625A (en) | 2022-11-16 | 2022-11-16 | Surge protector with strong follow current interruption capacity and no leakage current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115693625A (en) |
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2022
- 2022-11-16 CN CN202211433620.5A patent/CN115693625A/en active Pending
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