CN113629683A - Intelligent combined protection assembly with pulse arc pollution prevention structure for trigger type overvoltage protection gap - Google Patents
Intelligent combined protection assembly with pulse arc pollution prevention structure for trigger type overvoltage protection gap Download PDFInfo
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- CN113629683A CN113629683A CN202110828753.1A CN202110828753A CN113629683A CN 113629683 A CN113629683 A CN 113629683A CN 202110828753 A CN202110828753 A CN 202110828753A CN 113629683 A CN113629683 A CN 113629683A
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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
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
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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
- H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
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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
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Abstract
An intelligent combined protection component with a trigger type overvoltage protection gap for preventing pulse arc pollution is formed by connecting the trigger type overvoltage protection gap with an antifouling structure in series with a zinc oxide arrester unit; the upper electrode, the lower electrode and the annular trigger electrode of the trigger type overvoltage protection gap are sealed in a gas or vacuum environment, and the trigger mode between the annular trigger electrode and the lower electrode is triggered by an insulating dielectric material and has a structure for preventing pulse arc pollution. The trigger of the trigger type overvoltage protection gap has stronger initial trigger carrier release capacity, so that the trigger type overvoltage protection gap reduces the pulse breakdown voltage of the overvoltage protection gap and has extremely fast lightning overvoltage response characteristic while the direct current withstand voltage is not influenced; the triggering mode between the annular triggering electrode and the lower electrode is surface discharge triggering, and the surface flashover discharge interface is vertical to the surface of the main electrode, so that the service life of the triggering type overvoltage protection gap can be greatly prolonged.
Description
Technical Field
The invention relates to a high-performance lightning arrester with an overvoltage protection gap connected in series outside in the fields of electric power, high-speed information railway power transmission and the like, in particular to an intelligent combined protection component with a trigger type overvoltage protection gap with a pulse arc pollution prevention structure.
Background
The lightning arrester with the outer series gap is an important novel overvoltage protection device for AC/DC power transmission and high-speed informatization railway systems, the discharge gaps of the lightning arresters with the outer series gap at home and abroad are mostly adopted to work in the atmospheric environment, and the discharge gaps of the atmospheric environment have the defects of high impact breakdown voltage, high dispersity and easy environmental influence, so that particularly, when the air humidity is high or in rainy days, such as a 10kV power transmission system, the protection gap distance of the lightning arrester with the outer series gap is about 30-50mm, and the pulse discharge voltage reaches up to 100kV, so that higher requirements are provided for the withstand voltage of power equipment of the 10kV system; in a 110kV power transmission system, the protection gap distance of an outer series gap arrester is about 500mm, and the pulse discharge voltage of the outer series gap arrester is up to over 500 kV. Therefore, in the actual operation process, the outer-string gap arrester is often not operated when being struck by lightning, so that the electric equipment (such as an insulator) breaks down (or flashover along the surface) to cause an electric accident.
With the development requirements of electric power, high-speed information railway and the like, higher requirements are provided for the lightning arrester with the outside serial gap, and the requirements mainly comprise the following steps: (1) the AC/DC withstand voltage of the outer series gap is high, and the impulse breakdown/flashover voltage is low. (2) The external serial gap lightning arrester has strong enough subsequent power frequency or direct current arc suppression capability; (3) the outer series gap lightning arrester has higher lightning impulse protection level and good insulation matching characteristic with a protected object. At present, the external gap arrester cannot meet the performance requirements, and the performance index of the external gap arrester needs to be improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a high-performance intelligent combined protection assembly with a trigger type overvoltage protection gap of a pulse arc pollution prevention structure, and the external serial gap lightning arrester has the remarkable characteristics of higher alternating current/direct current withstand voltage, lower impulse breakdown voltage, quick lightning overvoltage response speed, good matching effect with protected power equipment and capability of effectively preventing pulse arc pollution.
In order to achieve the purpose, the invention adopts the technical scheme that: the lightning arrester is formed by connecting a triggering type overvoltage protection gap with an anti-pollution structure and a zinc oxide lightning arrester unit in series;
the trigger type overvoltage protection gap with the antifouling structure is a trigger type surface discharge overvoltage protection gap with an annular trigger electrode, and comprises an upper insulating shell, a lower insulating shell, an upper end flange and a lower end flange, wherein the air pressure formed by the upper insulating shell, the lower insulating shell, the upper end flange and the lower end flange is 100～103Pa or 104～5×105Pa, an upper electrode and a lower electrode which are arranged on an upper end flange and a lower end flange through an upper guide rod and a lower guide rod are arranged in the cavity, a discharge gap is formed between the upper electrode and the lower electrode, an annular trigger electrode is arranged between an upper insulating shell and a lower insulating shell, the annular trigger electrode is provided with a protruding connecting terminal and is used for connecting lightning induced overvoltage or operation overvoltage, lightning energy is coupled through an active coupling trigger circuit, an annular surface discharge insulating medium material with an insulating and isolating function is arranged between the annular trigger electrode and the lower electrode, the annular trigger electrode covers the upper surface of the annular surface discharge insulating medium material, a surface discharge trigger forming a trigger type overvoltage protection gap among the annular trigger electrode, the annular surface discharge insulating medium material and the lower electrode forms a surface flashover discharge interface, and the upper surface of the lower electrode is lower than the upper surface of the annular surface discharge insulating medium material, the surface flashover discharge interface is vertical to or forms an acute angle with the upper surface of the lower electrode, and a shielding cover is arranged in the upper insulating shell around the upper electrode and the lower electrode;
the zinc oxide arrester unit is formed by connecting a plurality of zinc oxide nonlinear resistance discs in series, the zinc oxide arrester unit is fixedly installed in an insulating sleeve through insulating filling glue, the upper end and the lower end of each resistor disc connected in series are respectively provided with an upper electrode and a lower electrode of the arrester, the upper electrode and the lower electrode of the arrester are electrically connected with the resistor discs connected in series through upper flanges and lower flanges of the arrester, and the outer sides of the resistor discs connected in series are provided with insulating umbrella skirt jackets;
the lower electrode of the trigger type overvoltage protection gap with the structure for preventing the pulse arc pollution is connected with the upper electrode of the zinc oxide arrester, the upper electrode of the trigger type overvoltage protection gap is connected with the upper end of the protected power equipment, and the lower electrode of the zinc oxide arrester is connected with the lower end of the protected power equipment.
The lower surface of the annular trigger electrode is in close contact with the upper surface of the annular surface discharge insulating dielectric material, and the inner diameter of the annular trigger electrode is smaller than or equal to that of the annular surface discharge insulating dielectric material.
The inner diameter of the annular trigger electrode is less than the inner diameter of the annular surface discharge insulating dielectric material by 1.5 mm.
The annular trigger electrode is arranged at the joint of the upper insulating shell and the lower insulating shell, and the thickness of the annular trigger electrode is 3-5 mm.
The annular surface discharge insulating medium material is made of polytetrafluoroethylene with the ring width of 5-15mm, a semiconductor or a ceramic material.
The acute angle between the surface flashover discharge interface and the upper surface of the main electrode is 300～700。
The shielding cover is made of oxygen-free copper.
The invention connects the triggering type overvoltage protection gap with the structure for preventing the impulse arc pollution and the zinc oxide nonlinear resistance unit in series to form the lightning arrester with the external series triggering type gap, the upper electrode, the lower electrode and the annular triggering electrode of the triggering type overvoltage protection gap are sealed in the gas or vacuum environment, the triggering mode between the annular triggering electrode and the lower electrode is the triggering of the insulating medium material and has the structure for preventing the impulse arc pollution. Significant advantages include: (1) the trigger of the trigger type overvoltage protection gap has stronger initial trigger carrier release capacity, so that the trigger type overvoltage protection gap can greatly reduce the pulse breakdown voltage of the overvoltage protection gap and has extremely fast lightning overvoltage response characteristic while the direct current withstand voltage is not influenced; (2) the triggering mode between the annular triggering electrode and the lower electrode is surface discharge triggering, the surface flashover discharge interface is vertical to the surface of the main electrode and is parallel to the path of the pulse arc between the main electrodes, so that metal vapor generated by the overvoltage pulse arc can be prevented from being deposited on the surface of an insulating medium, and the service life of the triggering type overvoltage protection gap is greatly prolonged; (3) particularly, the triggering type overvoltage protection gap has the remarkable characteristics of high direct current breakdown voltage and low impact breakdown voltage, so that the zinc oxide arrester unit does not need to bear long-term power frequency/direct current voltage under normal working conditions, and the defect of performance degradation caused by long-term power frequency/direct current leakage current does not exist, therefore, the zinc oxide arrester unit can be designed to have the characteristics of low direct current reference voltage and low lightning impulse voltage, and the overvoltage protection level of the intelligent combined protection component with the out-of-band series gap is greatly improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic diagram of a trigger type overvoltage protection gap having a structure for preventing pulsed arc contamination according to the present invention.
Fig. 3 is a schematic view of another structure of the trigger type overvoltage protection gap having a structure for preventing the pollution of the pulsed arc according to the present invention.
Fig. 4 is a schematic structural view of the zinc oxide arrester unit of the present invention.
Fig. 5 is a schematic diagram of a trigger circuit of the trigger type overvoltage protection gap with a structure for preventing pulsed arc contamination according to the present invention.
In the figure, 1 an upper insulating shell, 2 a lower insulating shell, 3 an upper electrode, 4 a lower electrode, 5 an upper end flange, 6 a lower end flange, 7 an annular trigger electrode, 8 an annular surface discharge insulating medium material, 9 shielding cases, 9 and 10 surface flashover discharge interfaces, 11 an upper guide rod, 12 a lower guide rod, 13 an arrester upper flange, 14 an arrester upper electrode, 15 an insulating shed, 16 a resistance sheet, 17 filling glue, 18 an arrester lower electrode and 19 an arrester lower flange.
Detailed Description
The structural and operational principles of the present invention will be described in further detail with reference to the accompanying drawings and embodiments.
See fig. 1, 2, 3, 4 and 5. The invention is formed by connecting a trigger type overvoltage protection gap with a structure for preventing pulse arc pollution and a zinc oxide arrester unit in series;
the structure of the trigger type overvoltage protection gap with the structure for preventing the impulse arc pollution is shown in fig. 2 or fig. 3, and the structure of the zinc oxide arrester unit is shown in fig. 4. The lower electrode of the trigger type overvoltage protection gap is connected with the upper electrode of the zinc oxide arrester unit, the upper electrode of the trigger type overvoltage protection gap is connected with the upper end of the protected power equipment, and the lower electrode of the zinc oxide arrester unit is connected with the lower end of the protected power equipment; or the connection mode can be the connection mode interchanged with the electrical connection, namely, the lower electrode of the zinc oxide arrester unit is connected with the upper electrode of the triggering type overvoltage protection gap, the upper electrode of the zinc oxide arrester unit is connected with the upper end of the protected power equipment, and the lower electrode of the triggering type overvoltage protection gap is connected with the lower end of the protected power equipment.
Fig. 2 is a schematic structural view of a trigger type overvoltage protection gap having a structure for preventing a pulsed arc from contaminating according to the present invention: the invention comprises an upper insulating shell 1, a lower insulating shell 2, an upper end flange 5 and a lower end flange 6, wherein the air pressure formed by the upper insulating shell 1, the lower insulating shell 2 and the upper end flange 5 is 100～103Or 104～5×105Pa, closed chamber, or vacuum degree of 10-1～10-5Pa closed cavity, upper electrode 3 and lower electrode 4 mounted on upper and lower end flanges 5, 6 through upper and lower guide rods 11, 12 in the cavity, main discharge gap formed between the upper electrode 3 and the lower electrode 4, annular trigger electrode 7 with thickness of 3-5mm mounted around the lower electrode 4 at the joint of the upper insulating shell 1 and the lower insulating shell 2, annular trigger electrode 7 having a protruding connection terminal for connecting lightning overvoltage or lightning energy coupled by active coupling trigger circuit, annular surface discharge insulating dielectric material 8 made of polytetrafluoroethylene, semiconductor or ceramic material with annular width of 5-15mm mounted between the annular trigger electrode 7 and the lower electrode 4 for insulating and isolating, annular trigger electrode 7 covering the upper surface of the annular surface discharge insulating dielectric material 8, the lower surface of the annular trigger electrode 7 and the upper surface of the annular surface discharge insulating dielectric material 8The inner diameter of the annular trigger electrode 7 is smaller than the inner diameter of the annular surface discharge insulating dielectric material 8 by 1.5mm, a surface flashover discharge interface 10 is formed by a surface discharge trigger forming a trigger type overvoltage protection gap among the annular trigger electrode 7, the annular surface discharge insulating dielectric material 8 and the lower electrode 4, the upper surface of the lower electrode 4 is lower than the upper surface of the annular surface discharge insulating dielectric material 8, the surface flashover discharge interface 10 is vertical to the upper surface of the main electrode 4 and is parallel to a pulse arc path between the main electrodes, and the annular trigger electrode covers the surface of the insulating dielectric, so that metal vapor generated by the pulse arc is effectively prevented from being deposited on the surface of the insulating dielectric, the trigger type overvoltage protection gap has a high voltage protection level, and importantly, the service life of the trigger type protection gap can be greatly prolonged. Meanwhile, a shielding cover 9 made of oxygen-free copper is arranged in the upper insulating shell 1 around the upper electrode 3 and the lower electrode 4, so that metal vapor can be prevented from diffusing and depositing on the insulating closed shells 1 and 2 to cause short circuit of the upper electrode 3 and the lower electrode 4.
Fig. 3 is another structure of the trigger type overvoltage protection gap of the present invention having a structure for preventing the pollution of the pulsed arc: the lower part of the annular surface discharge insulating dielectric material 8 is cylindrical, the inner side of the upper cylinder is trapezoidal, a surface flashover discharge interface 10 is formed between the annular surface discharge insulating dielectric material 8 and the contact points of the lower surfaces of the lower electrode 4 and the annular trigger electrode 7, and the acute angle between the surface flashover discharge interface 10 and the upper surface of the main electrode 4 is 300～700。
Fig. 4 is a schematic structural diagram of a zinc oxide arrester unit of the invention: the zinc oxide arrester unit is formed by connecting a plurality of zinc oxide nonlinear resistance discs 16 in series, the zinc oxide arrester unit is fixedly installed in an insulating sleeve through insulating filling glue 17, the upper end and the lower end of each resistance disc 16 connected in series are respectively provided with an upper electrode 14 and a lower electrode 18 of the arrester, the upper electrode 14 and the lower electrode 18 of the arrester are electrically connected with the resistance discs 16 connected in series through upper flanges 13 and lower flanges 19 of the arrester, and the outer sides of the resistance discs connected in series are provided with insulating umbrella skirt jackets 15;
referring to fig. 5, the invention relates to a coupled trigger circuit of a trigger type overvoltage protection gap with a structure for preventing pulse arc pollution, which comprises: the overvoltage energy coupling unit consists of a coupling capacitor C1 and a coupling capacitor C2, wherein the capacitance of the coupling capacitor C1 is far larger than that of the coupling capacitor C2, so that under the action of lightning overvoltage, most of overvoltage acts on the coupling capacitor C2 to enable an isolation gap to be conducted, pulse current passes through the primary side of the pulse transformer T, pulse voltage is induced at two ends of the primary side, the primary side is amplified by the pulse transformer T (step-up transformer) to provide enough trigger voltage for the trigger overvoltage protection gap, the breakdown conduction speed of the trigger overvoltage protection gap is accelerated, thereby leading the trigger type overvoltage protection gap to have better overvoltage protection level than the passive type (without trigger electrode) two-pole discharge gap with the same static AC/DC breakdown voltage, the ratio of the impulse breakdown voltage to the direct current breakdown voltage can be regulated to be close to 1 or even less than 1.
The most remarkable characteristics of the invention different from the existing arrester with the out-of-band series gap are as follows: (1) the trigger type overvoltage protection gap with a pulse arc pollution prevention structure is adopted, an automatic coupling overvoltage energy mechanism is arranged, and the trigger type overvoltage protection gap adopts a trigger mode of surface discharge of an annular insulating medium material, so that the trigger type overvoltage protection gap has the remarkable characteristics that the pulse breakdown voltage of the trigger type overvoltage protection gap lightning arrester can be remarkably reduced and the response time is shortened under the condition that the alternating current/direct current withstand voltage or direct current breakdown voltage of the existing gap lightning arrester is not reduced. (2) The surface flashover discharge interface or path of the surface flashover trigger is vertical to the surface of the lower electrode (or sharp), and is parallel to the pulse arc path between the main electrodes (or sharp), so that the deposition of metal vapor generated by the pulse arc on the surface of an insulating medium is effectively avoided, and the service lives of the trigger type protective gap trigger and the protective gap are greatly prolonged. (3) The extinguishing capability of the strong arc in the vacuum environment can obviously improve the capability of the trigger type overvoltage protection gap for inhibiting subsequent power frequency or direct current. (4) Due to the isolation effect of the outer string triggering type overvoltage protection gap, the alternating current/direct current withstand voltage and the direct current breakdown voltage of the zinc oxide arrester unit in the outer string gap arrester can be reduced, so that under the action of nominal lightning discharge current, the impact residual voltage of the zinc oxide arrester is greatly reduced, and therefore the arrester with the outer string triggering type overvoltage protection gap has an overvoltage protection level better than that of the existing gap arrester, and also has excellent working stability and is not influenced by external environment (such as humidity, altitude and wind speed) factors. In a word, the intelligent combined protection assembly with the out-of-band series triggering type overvoltage protection gap has the remarkable characteristics of high alternating current/direct current tolerance or breakdown voltage, low impact breakdown voltage, quick lightning response time and the like, and meanwhile, the triggering type overvoltage protection gap is provided with a pulse arc pollution prevention structure, so that the service life of the overvoltage protection gap can be greatly prolonged. The intelligent combined protection component with the trigger type overvoltage protection gap of the pulse arc pollution prevention structure can be used for lightning induction overvoltage protection in power distribution and similar application occasions.
Claims (7)
1. The utility model provides an intelligence combination protection component in trigger type overvoltage protection clearance with prevent pulse arc pollution structure which characterized in that: the trigger type overvoltage protection gap is connected with the zinc oxide arrester unit in series;
the trigger type overvoltage protection gap with the pulse arc pollution prevention structure is a trigger type surface discharge overvoltage protection gap with an annular trigger electrode, and comprises an upper insulating shell (1), a lower insulating shell (2), an upper end flange (5) and a lower end flange (6), wherein the air pressure formed by the upper insulating shell, the lower insulating shell, the upper end flange and the lower end flange is 100～103Pa or 104～5×105Pa of a closed cavity or vacuum degree of 10-1～10- 5Pa, an upper electrode (3) and a lower electrode (4) which are arranged on upper and lower end flanges (5, 6) through upper and lower guide rods (11, 12) are arranged in the cavity, a discharge gap is formed between the upper electrode (3) and the lower electrode (4), an annular trigger electrode (7) is arranged between an upper insulating shell (1) and a lower insulating shell (2), the annular trigger electrode (7) is provided with a connecting terminal which extends out and is used for connecting lightning induced overvoltage or operating the lightning energy which is coupled by an active coupling trigger circuit, and an annular surface discharge insulating dielectric material which plays a role of insulating and isolating is arranged between the annular trigger electrode (7) and the lower electrode (4)The device comprises a material (8), an annular trigger electrode (7) covers the upper surface of an annular surface discharge insulating dielectric material (8), a surface discharge trigger forming a trigger type overvoltage protection gap among the annular trigger electrode (7), the annular surface discharge insulating dielectric material (8) and a lower electrode (4) forms a surface flashover discharge interface (10), the upper surface of the lower electrode (4) is lower than the upper surface of the annular surface discharge insulating dielectric material (8), the surface flashover discharge interface (10) is vertical to or forms an acute angle with the upper surface of the lower electrode (4), and meanwhile, a shielding cover (9) is arranged in an upper insulating shell (1) around the upper electrode (3) and the lower electrode (4);
the zinc oxide lightning arrester unit is formed by connecting a plurality of zinc oxide nonlinear resistance discs (16) in series, the zinc oxide lightning arrester unit is fixedly installed in an insulating sleeve through insulating filling glue (17), the upper end and the lower end of each resistance disc (16) connected in series are respectively provided with an upper electrode (14) and a lower electrode (18) of the lightning arrester, the upper electrode and the lower electrode are electrically connected with the resistance discs (16) connected in series through upper flanges and lower flanges (13 and 19) of the lightning arrester, and the outer sides of the resistance discs connected in series are provided with insulating umbrella skirt jackets (15);
the lower electrode of the trigger type overvoltage protection gap is connected with the upper electrode of the zinc oxide arrester, the upper electrode of the trigger type overvoltage protection gap is connected with the upper end of the protected power equipment, and the lower electrode of the zinc oxide arrester is connected with the lower end of the protected power equipment.
2. The intelligent combined protection assembly with a trigger type overvoltage protection gap of a structure for preventing pulsed arc pollution according to claim 1, characterized in that: the lower surface of the annular trigger electrode (7) is tightly contacted with the upper surface of the annular surface discharge insulating dielectric material (8), and the inner diameter of the annular trigger electrode (7) is less than or equal to that of the annular surface discharge insulating dielectric material (8).
3. The intelligent combined protection assembly with a trigger type overvoltage protection gap of a structure for preventing pulsed arc pollution according to claim 1, characterized in that: the inner diameter of the annular trigger electrode (7) is less than the inner diameter of the annular surface discharge insulating dielectric material (8) by 1.5 mm.
4. The intelligent combined protection assembly with a trigger type overvoltage protection gap of a structure for preventing pulsed arc pollution according to claim 1, characterized in that: the annular trigger electrode (7) is arranged at the joint of the upper and lower insulating shells (1, 2), and the thickness of the annular trigger electrode is 3-5 mm.
5. The intelligent combined protection assembly with a trigger type overvoltage protection gap of a structure for preventing pulsed arc pollution according to claim 1, characterized in that: the annular surface discharge insulating dielectric material (8) is made of polytetrafluoroethylene with the annular width of 5-15mm, a semiconductor or a ceramic material.
6. The intelligent combined protection assembly with a trigger type overvoltage protection gap of a structure for preventing pulsed arc pollution according to claim 1, characterized in that: the acute angle between the surface flashover discharge interface (10) and the upper surface of the main electrode (4) is 30-70 degrees.
7. The intelligent combined protection assembly with a trigger type overvoltage protection gap of a structure for preventing pulsed arc pollution according to claim 1, characterized in that: the shielding cover (9) is made of oxygen-free copper.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110828753.1A CN113629683B (en) | 2021-07-22 | 2021-07-22 | Intelligent combined protection assembly with trigger type overvoltage protection gap of pulse arc pollution prevention structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110828753.1A CN113629683B (en) | 2021-07-22 | 2021-07-22 | Intelligent combined protection assembly with trigger type overvoltage protection gap of pulse arc pollution prevention structure |
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| CN113629683A true CN113629683A (en) | 2021-11-09 |
| CN113629683B CN113629683B (en) | 2023-08-01 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2027288A1 (en) * | 1989-10-11 | 1991-04-12 | Laurence K. Wendahl | Series gapped metal oxide surge arrester |
| JPH05326105A (en) * | 1992-05-18 | 1993-12-10 | Sumitomo Electric Ind Ltd | Serial gap displacement type arrester |
| CN109038222A (en) * | 2018-07-30 | 2018-12-18 | 华格电子（昆山）有限公司 | There is the active overvoltage protection gap of plug function under vacuum environment |
| CN109038221A (en) * | 2018-07-30 | 2018-12-18 | 华格电子（昆山）有限公司 | There is the active overvoltage protection gap of plug function under gaseous environment |
| CN110098564A (en) * | 2019-04-22 | 2019-08-06 | 中国电力科学研究院有限公司 | A kind of band external series gap lightning arrester and lightning protection system |
-
2021
- 2021-07-22 CN CN202110828753.1A patent/CN113629683B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2027288A1 (en) * | 1989-10-11 | 1991-04-12 | Laurence K. Wendahl | Series gapped metal oxide surge arrester |
| JPH05326105A (en) * | 1992-05-18 | 1993-12-10 | Sumitomo Electric Ind Ltd | Serial gap displacement type arrester |
| CN109038222A (en) * | 2018-07-30 | 2018-12-18 | 华格电子（昆山）有限公司 | There is the active overvoltage protection gap of plug function under vacuum environment |
| CN109038221A (en) * | 2018-07-30 | 2018-12-18 | 华格电子（昆山）有限公司 | There is the active overvoltage protection gap of plug function under gaseous environment |
| CN110098564A (en) * | 2019-04-22 | 2019-08-06 | 中国电力科学研究院有限公司 | A kind of band external series gap lightning arrester and lightning protection system |
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