CN202206131U - Current-limiting type double-channel surge protection device - Google Patents
Current-limiting type double-channel surge protection device Download PDFInfo
- Publication number
- CN202206131U CN202206131U CN2011202997064U CN201120299706U CN202206131U CN 202206131 U CN202206131 U CN 202206131U CN 2011202997064 U CN2011202997064 U CN 2011202997064U CN 201120299706 U CN201120299706 U CN 201120299706U CN 202206131 U CN202206131 U CN 202206131U
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- temperature coefficient
- positive temperature
- piezo
- resistance
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Abstract
The utility model relates to a current-limiting type double-channel surge protection device which comprises a positive temperature coefficient component, a discharging tube and a piezoresistor, wherein the positive temperature coefficient component and the discharging tube are in parallel connection and then are serially connected with the piezoresistor; a current-limiting channel is formed by the positive temperature coefficient component and the piezoresistor; and a thunder current discharging channel is formed by the discharging tube and the piezoresistor. In the current-limiting type double-channel surge protection device provided by the utility model, two discharging channels are used for limiting a thunder current and a possibly generated transient overvoltage, thereby reducing the leakage current of the piezoresistor, prolonging the service life of the surge protection device, prolonging an ageing process of the piezoresistor and avoiding a fire accident caused by the ageing of the piezoresistor.
Description
Technical field
The utility model relates to electric and electronic technical field, specifically is current-limiting type binary channels surge protector.
Background technology
At present, be used for the surge protector of atmospheric over voltage protection, form by piezo-resistance and thermal release device; Though extensive use; But the situation that surge protector does not but burn out through thunderbolt often takes place, because there is leakage current in single piezo-resistance, often heat ageing is short-circuited or open fault owing to crossing to cause surge protector; Shortened the useful life of surge protector, possible initiation fire accident; In addition, piezo-resistance can not be born lasting temporary overvoltage, and common surge protector can only bear 355V overvoltage 5s; And the duration of temporary overvoltage is between 0.1s～60s; Therefore, temporary overvoltage often causes piezo-resistance generation thermal breakdown on-the-spot, initiation fire when serious; Consequence is very serious, and stability, the fail safe of surge protector self and electric power system caused very big potential safety hazard.
The utility model content
The main purpose of the utility model provides a kind of current-limiting type binary channels surge protector, to reduce piezo-resistance leakage current and the useful life that increases surge protector.
The utility model solves the technical scheme that its technical problem adopted:
A kind of current-limiting type binary channels surge protector, it comprises: positive temperature coefficient components and parts, discharge tube and piezo-resistance, wherein:
Said positive temperature coefficient components and parts are parallelly connected with said discharge tube, and connect with said piezo-resistance again, and said positive temperature coefficient components and parts and said piezo-resistance form restricted flow passage, and said discharge tube and said piezo-resistance form the lightning current leakage path.
Preferably, also be in series with thermal release device between said positive temperature coefficient components and parts and the said piezo-resistance.
Preferably, said discharge tube is a ceramic discharge tube.
Preferably, said positive temperature coefficient components and parts are positive temperature coefficient resistor.
Implement the technical scheme of the utility model; Has following beneficial effect: the current-limiting type binary channels surge protector that the utility model provides; Through two discharge channels lightning current and issuable temporary overvoltage are limited, reduced the piezo-resistance leakage current, increase the useful life of surge protector; Prolonged the ageing process of piezo-resistance, avoided because of the aging fire incident that produces of piezo-resistance.
Description of drawings
The structure principle chart of the current-limiting type binary channels surge protector that Fig. 1 provides for the utility model embodiment.
The realization of the utility model purpose, functional characteristics and advantage will combine embodiment, further specify with reference to accompanying drawing.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The utility model embodiment provides a kind of current-limiting type binary channels surge protector, and as shown in Figure 1, this surge protector comprises: positive temperature coefficient components and parts 110, discharge tube 120 and piezo-resistance 130, wherein:
Said positive temperature coefficient components and parts 110 are parallelly connected with said discharge tube 120; And connect with said piezo-resistance 130 again; Said positive temperature coefficient components and parts 110 form restricted flow passage with said piezo-resistance 130, and said discharge tube 120 forms the lightning current leakage path with said piezo-resistance 130.Wherein the A point connects the live wire of electrical network, and the B point connects the ground wire of electrical network.In the present embodiment, preferably, said discharge tube 120 is a ceramic discharge tube.Said positive temperature coefficient components and parts 110 are positive temperature coefficient resistor.
In the present embodiment, said positive temperature coefficient components and parts 110 form restricted flow passage (overvoltage path during length) with said piezo-resistance 130, and an operating temperature T is arranged
S, when the body temperature of positive temperature coefficient resistor 110 is lower than T
SThe time, the resistance value of this positive temperature coefficient resistor 110 remains on the very low numerical value, when this body temperature of positive temperature coefficient resistor 110 surpasses T
SAfter, the resistance value of this positive temperature coefficient resistor 110 can increase rapidly.When electrical network breaks down when causing long overcurrent; Can cause the rapid rising of the resistance value of positive temperature coefficient resistor 110; Thereby make electric current be reduced to enough little through piezo-resistance 130; Stop the temperature of piezo-resistance 130 to raise, to such an extent as to can not make piezo-resistance 130 wear out, damage because of short circuit current, the fire that causes in the time of can also avoiding continuing overcurrent through piezo-resistance 130.After power system restoration was normal, positive temperature coefficient resistor 110 returned to normal low resistance state.When electrical network broke down accident, this restricted flow passage can move.The voltage of voltage ratio transition was little a lot of when this was long, was generally temporary overvoltage, but from having destructiveness in essence more.The rising of voltage during along with length, positive temperature coefficient resistor 110 can limit the electric current that flows through piezo-resistance 130.When returning to system power, continue its normal lightning protection function of performance.
When the duration had only several delicate transient high voltage to take place, this lightning current leakage path can move.This situation takes place when switching overvoltage or thunder discharge usually.Ceramic discharge tube 120 all has the very short response time with piezo-resistance 130, can under lower protection voltage levvl, move, and this provides effective protection to the sensitive electronic equipment in the electrical network.
In addition, in a further embodiment,, also be in series with thermal release device 140 between said positive temperature coefficient components and parts 110 and the said piezo-resistance 130 in order to prevent when voltage overload, this surge protector to be kept apart from electrical network at the voltage of overload.
More than be merely the preferred embodiment of the utility model,, any modification of being done within all spirit at the utility model and the principle, be equal to and replace and improvement etc., all should be included within the protection range of the utility model not in order to restriction the utility model.
Claims (4)
1. a current-limiting type binary channels surge protector is characterized in that, comprising: positive temperature coefficient components and parts, discharge tube and piezo-resistance, wherein:
Said positive temperature coefficient components and parts are parallelly connected with said discharge tube, and connect with said piezo-resistance again, and said positive temperature coefficient components and parts and said piezo-resistance form restricted flow passage, and said discharge tube and said piezo-resistance form the lightning current leakage path.
2. current-limiting type binary channels surge protector according to claim 1 is characterized in that, also is in series with thermal release device between said positive temperature coefficient components and parts and the said piezo-resistance.
3. current-limiting type binary channels surge protector according to claim 1 or claim 2 is characterized in that said discharge tube is a ceramic discharge tube.
4. current-limiting type binary channels surge protector according to claim 1 or claim 2 is characterized in that said positive temperature coefficient components and parts are positive temperature coefficient resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202997064U CN202206131U (en) | 2011-08-17 | 2011-08-17 | Current-limiting type double-channel surge protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202997064U CN202206131U (en) | 2011-08-17 | 2011-08-17 | Current-limiting type double-channel surge protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202206131U true CN202206131U (en) | 2012-04-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202997064U Expired - Fee Related CN202206131U (en) | 2011-08-17 | 2011-08-17 | Current-limiting type double-channel surge protection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202206131U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023003A (en) * | 2012-11-26 | 2013-04-03 | 南京宁普防雷技术有限公司 | Over-voltage absorption circuit and over-voltage absorption device |
| CN103346547A (en) * | 2013-06-28 | 2013-10-09 | 华南理工大学 | Anti-thunder overvoltage protection device |
| CN103779857A (en) * | 2012-10-24 | 2014-05-07 | 孙巍巍 | Novel surge protection device |
| CN103855699A (en) * | 2012-12-06 | 2014-06-11 | 孙巍巍 | Novel surge protection device |
| CN110739674A (en) * | 2019-10-10 | 2020-01-31 | 广东浪潮大数据研究有限公司 | anti-surge circuit and anti-surge power supply |
-
2011
- 2011-08-17 CN CN2011202997064U patent/CN202206131U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779857A (en) * | 2012-10-24 | 2014-05-07 | 孙巍巍 | Novel surge protection device |
| CN103023003A (en) * | 2012-11-26 | 2013-04-03 | 南京宁普防雷技术有限公司 | Over-voltage absorption circuit and over-voltage absorption device |
| CN103023003B (en) * | 2012-11-26 | 2015-08-05 | 南京宁普防雷设备制造有限公司 | Overvoltage absorbing circuit and overvoltage absorbing device |
| CN103855699A (en) * | 2012-12-06 | 2014-06-11 | 孙巍巍 | Novel surge protection device |
| CN103855699B (en) * | 2012-12-06 | 2017-09-29 | 孙巍巍 | A kind of new surge protector |
| CN103346547A (en) * | 2013-06-28 | 2013-10-09 | 华南理工大学 | Anti-thunder overvoltage protection device |
| CN103346547B (en) * | 2013-06-28 | 2016-03-30 | 华南理工大学 | A kind of Thunder-prevention overvoltage protection device |
| CN110739674A (en) * | 2019-10-10 | 2020-01-31 | 广东浪潮大数据研究有限公司 | anti-surge circuit and anti-surge power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120425 Termination date: 20200817 |
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| CF01 | Termination of patent right due to non-payment of annual fee |