CN116247636A - High-power multi-pulse surge protector - Google Patents
High-power multi-pulse surge protector Download PDFInfo
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- CN116247636A CN116247636A CN202310217380.3A CN202310217380A CN116247636A CN 116247636 A CN116247636 A CN 116247636A CN 202310217380 A CN202310217380 A CN 202310217380A CN 116247636 A CN116247636 A CN 116247636A
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- surge protector
- voltage
- resistor
- subassembly
- sensitive resistor
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- 230000001012 protector Effects 0.000 title claims abstract description 36
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 238000003466 welding Methods 0.000 claims abstract description 12
- 238000002474 experimental method Methods 0.000 claims abstract description 4
- 238000012216 screening Methods 0.000 claims description 6
- 208000025274 Lightning injury Diseases 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 238000009863 impact test Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005476 soldering Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Classifications
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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
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a high-power multi-pulse surge protector, which comprises: the shell, a plurality of piezo-resistor subassembly, first terminal subassembly and second terminal subassembly, the quantity of piezo-resistor subassembly is greater than or equal to 3 and parallelly connected the setting, the piezo-resistor subassembly includes: the voltage-sensitive resistor comprises a voltage-sensitive resistor, high-temperature end welding lugs and tripping end welding lugs which are respectively arranged at two ends of the voltage-sensitive resistor, wherein the first terminal assembly is connected with the high-temperature end welding lugs of the voltage-sensitive resistor, and the second terminal assembly is connected with the tripping end welding lugs of the voltage-sensitive resistor through low-temperature tripping lugs; in the same surge protector, the conducting voltage of the piezoresistor in a 1mA current test is within 2V, and the residual voltage in a 3KA lightning strike impact experiment is within 5V. The invention has the beneficial effects that: in the invention, I is realized by design M The working parameters of the multi-pulse surge protector are normal under the impact of ten pulses which are more than or equal to 80kA, and the multi-pulse surge protector has good protection effect on a power supply system.
Description
Technical Field
The invention relates to the technical field of lightning protection, in particular to a high-power multi-pulse surge protector.
Background
With the development of lightning protection technology, china has deeper understanding on lightning waveforms, single lightning stroke is displayed as a multi-pulse state, and a multi-pulse surge protector is generated. In 2022, 7 months, the group standard T/ASC 6004-2022/T/CMSA0032-2022 published by the China society of architecture and the China society of meteorological, namely the low-voltage distribution system multi-pulse surge protector performance requirement and test method, provides clear technical requirements for the multi-pulse surge protector. Based on the existing lightning protection requirement, the invention provides a high-power multi-pulse surge protector.
Disclosure of Invention
The invention aims to provide a high-power multi-pulse surge protector, which mainly solves the problem of current sharing in the parallel application process of a plurality of piezoresistors, prevents the problem that the short circuit of a power distribution system is affected due to damage caused by overcurrent and heat conduction of a single piezoresistor in a multi-pulse test, has the characteristic of no maintenance, can be standardized and generalized, and has a short production period.
The technical scheme of the invention is as follows: the present invention provides a method comprising: the shell, a plurality of piezo-resistor subassembly, first terminal subassembly and second terminal subassembly, the quantity of piezo-resistor subassembly is greater than or equal to 3 and parallelly connected the setting, the piezo-resistor subassembly includes: the voltage-sensitive resistor comprises a voltage-sensitive resistor, high-temperature end welding lugs and tripping end welding lugs which are respectively arranged at two ends of the voltage-sensitive resistor, wherein the first terminal assembly is connected with the high-temperature end welding lugs of the voltage-sensitive resistor, and the second terminal assembly is connected with the tripping end welding lugs of the voltage-sensitive resistor through low-temperature tripping lugs; in the same surge protector, the conducting voltage of the piezoresistor in a 1mA current test is within 2V, and the residual voltage in a 3KA lightning strike impact experiment is within 5V.
Further, the varistor selection includes the following steps:
step 1: 1mA current is adopted for testing the piezoresistor; the conducting voltage phase difference is taken as an interval to carry out sectional screening grouping;
step 2: 3kA impact test is carried out on the piezoresistor of the same group in the step 1 on a lightning stroke test bench (8/20 mu s), residual voltage of the piezoresistor is tested, and sectional screening and grouping are carried out by taking the residual voltage phase difference as a section;
step 3: when the surge protector is manufactured, the piezoresistors required in the same surge protector are selected from the same group obtained in the step 2.
Further, the piezoresistor, the high-temperature end soldering lug and the tripping end soldering lug are encapsulated by epoxy powder after being welded, and then the piezoresistor assembly is obtained through high-temperature solidification.
Further, the housing includes an upper case and a lower case assembled to form a receiving space, and the varistor assembly is disposed in the receiving space.
Further, a window sheet is further arranged at the shell.
Further, a track groove is formed in the bottom of the shell, and a track clip is arranged at the bottom of the shell corresponding to the track groove.
By adopting the scheme, the invention has the beneficial effects that: in the invention, I is realized by design M The working parameters of the multi-pulse surge protector are normal under the impact of ten pulses which are more than or equal to 80kA, and the multi-pulse surge protector has good protection effect on a power supply system.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is an exploded view of an embodiment of the present invention.
FIG. 3 is an exploded view of a pressure sensitive assembly according to one embodiment of the present invention.
Fig. 4 is an assembly schematic diagram of a first terminal assembly and a pressure sensitive assembly according to an embodiment of the invention.
Fig. 5 is an assembly schematic diagram of a second terminal assembly and a pressure sensitive assembly according to an embodiment of the present invention.
Fig. 6 is an equivalent circuit diagram of the present invention.
Detailed Description
The invention will be described in detail below with reference to the drawings and the specific embodiments.
Referring to fig. 1 to 6 in combination, in this embodiment, the present invention provides a high-power multi-pulse surge protector, including: the shell, a plurality of piezo-resistor subassembly 4, first terminal subassembly 3 and second terminal subassembly 5, the quantity of piezo-resistor subassembly 4 is greater than or equal to 3 and parallelly connected setting (quantity is 3 in this embodiment), piezo-resistor subassembly 4 includes: the varistor 41, and a high-temperature end soldering lug 42 and a trip end soldering lug 43 respectively arranged at two ends of the varistor 41, wherein the first terminal assembly 3 is connected with the high-temperature end soldering lug 42 of the varistor assembly 4, and the second terminal assembly 5 is connected with the trip end soldering lug 43 of the varistor 41 through a low-temperature trip lug 51; in the same surge protector, the voltage difference of the voltage dependent resistor 41 in the 1mA current test is within 2V, and the residual voltage in the 3KA lightning strike impact experiment is within 5V.
Further, the selecting of the varistor 41 includes the following steps:
step 1: a 1mA current test is adopted for the piezoresistor 41; the conducting voltage phase difference is taken as an interval to carry out sectional screening grouping;
step 2: 3kA impact test is carried out on the piezoresistor 41 in the same group in the step 1 on a lightning stroke test bench (8/20 mu s), residual voltage of the piezoresistor 41 is tested, and sectional screening and grouping are carried out by taking the residual voltage phase difference as a section;
step 3: when the surge protector is manufactured, the piezoresistor 41 required in the same surge protector is selected from the same group obtained in the step 2, so that the standardization and generalization of the subsequent surge protector are ensured, and the surge protector can be subjected to multiple pulse impact to keep normal operation.
Further, the varistor 41, the high-temperature end tab 42 and the trip end tab 43 are welded, encapsulated by epoxy powder, and cured at high temperature to obtain the varistor assembly 4.
Further, the housing includes an upper case 1 and a lower case 6, the upper case 1 and the lower case 6 are assembled to form a receiving space, and the varistor assembly 4 is disposed in the receiving space.
Further, the window sheet 7 is further arranged at the shell, so that the working state of the surge protector can be conveniently observed.
Further, a track groove is formed in the bottom of the shell, and a track clip 2 is arranged at the bottom of the shell corresponding to the track groove, so that the surge protector is conveniently arranged on the track.
In the scheme, the problem of current sharing in the parallel application process of the multiple piezoresistors is mainly solved, the problem that the single piezoresistor overcurrent and heat conduction in the multiple pulse test is damaged to influence the short circuit of the power distribution system is prevented, and meanwhile, the parallel application method has the characteristic of no maintenance, can be standardized and generalized, and has a short production period.
In summary, the beneficial effects of the invention are as follows: in the invention, I is realized by design M The working parameters of the multi-pulse surge protector are normal under the impact of ten pulses which are more than or equal to 80kA, and the multi-pulse surge protector has good protection effect on a power supply system.
The foregoing description of the preferred embodiment of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. A high power multi-pulse surge protector, comprising: the shell, a plurality of piezo-resistor subassembly, first terminal subassembly and second terminal subassembly, the quantity of piezo-resistor subassembly is greater than or equal to 3 and parallelly connected the setting, the piezo-resistor subassembly includes: the voltage-sensitive resistor comprises a voltage-sensitive resistor, high-temperature end welding lugs and tripping end welding lugs which are respectively arranged at two ends of the voltage-sensitive resistor, wherein the first terminal assembly is connected with the high-temperature end welding lugs of the voltage-sensitive resistor, and the second terminal assembly is connected with the tripping end welding lugs of the voltage-sensitive resistor through low-temperature tripping lugs; in the same surge protector, the conducting voltage of the piezoresistor in a 1mA current test is within 2V, and the residual voltage in a 3KA lightning strike impact experiment is within 5V.
2. The high power multi-pulse surge protector of claim 1, wherein the selection of the piezoresistor comprises the steps of:
step 1: 1mA current is adopted for testing the piezoresistor; the conducting voltage phase difference is taken as an interval to carry out sectional screening grouping;
step 2: carrying out 3kA impact test on the piezoresistor of the same group in the step 1 on a lightning stroke test bench, testing residual voltage of the piezoresistor, and carrying out sectional screening and grouping by taking the residual voltage phase difference as a section;
step 3: when the surge protector is manufactured, the piezoresistors required in the same surge protector are selected from the same group obtained in the step 2.
3. The high power multi-pulse surge protector of claim 1 or 2, wherein the varistor, the high temperature terminal lug and the trip terminal lug are encapsulated by epoxy powder after being welded, and then cured at high temperature to obtain the varistor assembly.
4. The high power multi-pulse surge protector of claim 1 or 2, wherein the housing comprises an upper housing and a lower housing assembled to form a receiving space, the varistor assembly being disposed in the receiving space.
5. The high power multi-pulse surge protector according to claim 1 or 2, wherein a window is further provided at the housing.
6. The high power multi-pulse surge protector according to claim 1 or 2, wherein the housing bottom is formed with a rail groove, and the housing bottom is provided with a rail clip corresponding to the rail groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310217380.3A CN116247636B (en) | 2023-02-27 | 2023-02-27 | High-power multi-pulse surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310217380.3A CN116247636B (en) | 2023-02-27 | 2023-02-27 | High-power multi-pulse surge protector |
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| Publication Number | Publication Date |
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| CN116247636A true CN116247636A (en) | 2023-06-09 |
| CN116247636B CN116247636B (en) | 2023-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310217380.3A Active CN116247636B (en) | 2023-02-27 | 2023-02-27 | High-power multi-pulse surge protector |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010261851A (en) * | 2009-05-08 | 2010-11-18 | Mitsubishi Electric Corp | Thunder impulse voltage testing apparatus and thunder impulse voltage testing method |
| CN203589721U (en) * | 2013-11-01 | 2014-05-07 | 徐大鹏 | Air discharge air gap device with triggering end and used for surge protection |
| CN103809040A (en) * | 2012-11-06 | 2014-05-21 | 昆山万丰电子有限公司 | Lightning current surge testing stand |
| CN109412132A (en) * | 2018-10-30 | 2019-03-01 | 成都铁达电子股份有限公司 | A kind of Surge Protector of high safety |
| CN110850255A (en) * | 2019-11-26 | 2020-02-28 | 张利华 | Test method for multiple lightning strike impulse discharge current |
| CN110937890A (en) * | 2018-09-25 | 2020-03-31 | 全球能源互联网研究院有限公司 | Varistor for lightning arrester and preparation method thereof |
| CN111740399A (en) * | 2020-06-19 | 2020-10-02 | 广东海悟科技有限公司 | Be suitable for lightning protection circuit of low residual voltage of large capacity |
| CN111769532A (en) * | 2020-07-31 | 2020-10-13 | 江苏嘉顿威尔电气有限公司 | Surge protector dropout structure and surge protector |
| CN214314564U (en) * | 2021-02-08 | 2021-09-28 | 广东安迅防雷科技股份有限公司 | Full-protection mode direct current lightning protection device |
| CN115347544A (en) * | 2022-08-22 | 2022-11-15 | 深圳市天盾雷电技术有限公司 | Composite surge protector with parallel discharge gap and piezoresistor |
-
2023
- 2023-02-27 CN CN202310217380.3A patent/CN116247636B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010261851A (en) * | 2009-05-08 | 2010-11-18 | Mitsubishi Electric Corp | Thunder impulse voltage testing apparatus and thunder impulse voltage testing method |
| CN103809040A (en) * | 2012-11-06 | 2014-05-21 | 昆山万丰电子有限公司 | Lightning current surge testing stand |
| CN203589721U (en) * | 2013-11-01 | 2014-05-07 | 徐大鹏 | Air discharge air gap device with triggering end and used for surge protection |
| CN110937890A (en) * | 2018-09-25 | 2020-03-31 | 全球能源互联网研究院有限公司 | Varistor for lightning arrester and preparation method thereof |
| CN109412132A (en) * | 2018-10-30 | 2019-03-01 | 成都铁达电子股份有限公司 | A kind of Surge Protector of high safety |
| CN110850255A (en) * | 2019-11-26 | 2020-02-28 | 张利华 | Test method for multiple lightning strike impulse discharge current |
| CN111740399A (en) * | 2020-06-19 | 2020-10-02 | 广东海悟科技有限公司 | Be suitable for lightning protection circuit of low residual voltage of large capacity |
| CN111769532A (en) * | 2020-07-31 | 2020-10-13 | 江苏嘉顿威尔电气有限公司 | Surge protector dropout structure and surge protector |
| CN214314564U (en) * | 2021-02-08 | 2021-09-28 | 广东安迅防雷科技股份有限公司 | Full-protection mode direct current lightning protection device |
| CN115347544A (en) * | 2022-08-22 | 2022-11-15 | 深圳市天盾雷电技术有限公司 | Composite surge protector with parallel discharge gap and piezoresistor |
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| CN116247636B (en) | 2023-11-14 |
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