CN202978261U - Double-channel surge protector - Google Patents
Double-channel surge protector Download PDFInfo
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- CN202978261U CN202978261U CN 201220745644 CN201220745644U CN202978261U CN 202978261 U CN202978261 U CN 202978261U CN 201220745644 CN201220745644 CN 201220745644 CN 201220745644 U CN201220745644 U CN 201220745644U CN 202978261 U CN202978261 U CN 202978261U
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- discharge tube
- temperature coefficient
- positive temperature
- resistance
- piezo
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Abstract
The utility model provides a double-channel surge protector. The double-channel surge protector comprises a positive temperature coefficient component, a first discharge tube, a second discharge tube and a varistor, wherein the positive temperature coefficient component is connected in series with the first discharge tube, the second discharge tube is connected in parallel with the positive temperature coefficient component and the first discharge tube, the second discharge tube is connected in series with the varistor, the positive temperature coefficient component is connected in series with the varistor, the first discharge tube, the positive temperature coefficient component and the varistor form a current-limiting channel, and the second discharge tube and the varistor form a lightning current discharging channel. According to the double-channel surge protector of the utility model, the lightning current discharging channel is utilized to discharge induction lightning current; the current-limiting channel is utilized to solve the problem of the damages of the physical structure of the surge protector caused by transient overvoltage; two discharge tubes are connected in series with the varistor, such that the problem of electric leakage caused by the ageing of the varistor can be solved; the service life of the surge protector is greatly prolonged; fire accidents caused by the aging of the varistor can be prevented; and the safety of the surge protector can be improved.
Description
Technical field
The utility model relates to electric and electronic technical field, specifically current-limiting type double-channel surge protection device.
Background technology
In prior art, the surge protector that is used for atmospheric over voltage protection, formed by piezo-resistance and thermal release device, although extensive use, but the situation that surge protector does not but burn out through thunderbolt often occurs, because there is leakage current in piezo-resistance, cause surge protector often to be short-circuited or open fault owing to crossing heat ageing, shortened the useful life of surge protector, possible initiation fire accident; The piezo-resistance of the surge protector that prior art provides can only be born 355V overvoltage 5s; and the duration of temporary overvoltage is between 0.1s～60s; therefore; temporary overvoltage often causes the piezo-resistance generation thermal breakdown phenomenon of surge protector; initiation fire when serious; consequence is very serious, and stability, the fail safe of surge protector self and electric power system caused very large potential safety hazard.
The utility model content
The utility model provides a kind of double-channel surge protection device, preventing the electric leakage of piezo-resistance, thus the useful life and the fail safe that improve surge protector.
To achieve these goals, the utility model provides following technical scheme:
A kind of double-channel surge protection device, it comprises: positive temperature coefficient components and parts, the first discharge tube, the second discharge tube and piezo-resistance, wherein:
Described positive temperature coefficient components and parts are connected with described the first discharge tube, described the second discharge tube is in parallel with described positive temperature coefficient components and parts and the first discharge tube, described the second discharge tube is connected with described piezo-resistance, described positive temperature coefficient components and parts are connected with described piezo-resistance, described the first discharge tube, positive temperature coefficient components and parts and described piezo-resistance form restricted flow passage, and described the second discharge tube and described piezo-resistance form the lightning current leakage path.
Preferably, also be in series with thermal release device between described positive temperature coefficient components and parts and described piezo-resistance.
Preferably, described the first discharge tube is ceramic discharge tube or gas discharge tube, and the second discharge tube is ceramic discharge tube or gas discharge tube.
Preferably, described positive temperature coefficient components and parts are positive temperature coefficient resistor.
By implementing above technical scheme; has following technique effect: the double-channel surge protection device that the utility model provides; utilize release induction lightening stream of lightning current leakage path, utilize restricted flow passage to solve the problem that temporary overvoltage destroys the surge protector physical structure.Adopt two methods that discharge tube is connected with piezo-resistance, also can solve piezo-resistance because of the electric leakage problem of aging appearance.Greatly extend the useful life of surge protector, avoided the fire incident that produces because piezo-resistance is aging, the fail safe that has improved surge protector.
Description of drawings
The circuit theory diagrams of the surge protector that Fig. 1 provides for the utility model.
Embodiment
In order better to understand the technical solution of the utility model, describe below in conjunction with accompanying drawing the embodiment that the utility model provides in detail.
The utility model embodiment provides a kind of double-channel surge protection device, as shown in Figure 1, comprising: positive temperature coefficient components and parts 101, the first discharge tube 105, the second discharge tube 102 and piezo-resistance 103, wherein:
Described positive temperature coefficient components and parts 101 are connected with described the first discharge tube 105, described the second discharge tube 102 is in parallel with described positive temperature coefficient components and parts 101 and the first discharge tube 105, described the second discharge tube 102 is connected with described piezo-resistance 103, described positive temperature coefficient components and parts 101 are connected with described piezo-resistance 103, described the first discharge tube 105, positive temperature coefficient components and parts 101 form restricted flow passage with described piezo-resistance 103, and described the second discharge tube 102 forms the lightning current leakage path with described piezo-resistance 103.Wherein the A point connects the live wire of electrical network, and the B point connects the ground wire of electrical network.
In other embodiments; on above-described embodiment basis; further; also be in series with thermal release device 104 between described positive temperature coefficient components and parts 101 and described piezo-resistance 103; when voltage overload; this thermal release device 104 can be kept apart this surge protector from electrical network, with this surge protector of better protection.
In the various embodiments described above, preferably, described the first discharge tube 105 is ceramic discharge tube or gas discharge tube, and the second discharge tube 102 is also ceramic discharge tube or gas discharge tube.
In the various embodiments described above, preferably, described positive temperature coefficient components and parts 101 are positive temperature coefficient resistor.
In the present embodiment, described the first discharge tube 105, positive temperature coefficient components and parts 101 form restricted flow passage (overvoltage path during length) with described piezo-resistance 103, and an operating temperature T is arranged
S, when the body temperature of positive temperature coefficient resistor lower than T
SThe time, the resistance value of this positive temperature coefficient resistor remains on very low numerical value, when this body temperature of positive temperature coefficient resistor surpasses T
SAfter, the resistance value of this positive temperature coefficient resistor 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, thereby make the electric current by piezo-resistance 103 be reduced to enough little, stop the temperature of piezo-resistance 103 to raise, to such an extent as to can not make piezo-resistance 103 because of short circuit current, aging, damage, the fire that causes in the time of can also avoiding continuing overcurrent through piezo-resistance 103 occur.After power system restoration was normal, positive temperature coefficient resistor returned to normal low resistance state.When electrical network broke down accident, this restricted flow passage can move.When this is long, the voltage of voltage ratio transition is little a lot, is generally temporary overvoltage, but from more having in essence destructiveness.The rising of voltage during along with length, positive temperature coefficient resistor can limit the electric current that flows through piezo-resistance 103, and the first discharge tube 105 can prevent piezo-resistance 103 electric leakages.When returning to system power, continue its normal lightning protection function of performance.
The second discharge tube 102 forms lightning current leakage path (overvoltage path in short-term) with piezo-resistance 103.This lightning current leakage path is mainly for the overvoltage of the instantaneous generations such as lightning overvoltage, switching overvoltage.This lightning current leakage path is composed in series with piezo-resistance 103 by the second discharge tube 102, forms a discharge channel.Effectively intercepted the leakage current of piezo-resistance 103, make the leakage current of piezo-resistance 103 become 0 by the microampere rank, extended the useful life of piezo-resistance 103, also made simultaneously power frequency continued flow that the second discharge tube 102 produces by lightning current the time in the situation that do not need external fuse to be effectively controlled.
When the duration only had several delicate transient high voltage to occur, this lightning current leakage path can move.This situation occurs when switching overvoltage or thunder discharge usually.The second discharge tube 102 all has the very short response time with piezo-resistance 103, can move under lower protection voltage levvl, and this provides effective protection to the sensitive electronic equipment in electrical network.
This surge protector utilizes release induction lightening stream of lightning current leakage path, utilizes restricted flow passage to solve the problem that temporary overvoltage destroys the surge protector physical structure.Adopt two methods that discharge tube is connected with piezo-resistance, also can solve piezo-resistance because of the electric leakage problem of aging appearance.Greatly extend the useful life of surge protector, avoided the fire incident that produces because piezo-resistance is aging, the fail safe that has improved surge protector.
Above a kind of double-channel surge protection device that the utility model embodiment is provided is described in detail; for one of ordinary skill in the art; thought according to the utility model embodiment; all will change in specific embodiments and applications; in sum, this description should not be construed as restriction of the present utility model.
Claims (4)
1. a double-channel surge protection device, is characterized in that, comprising: positive temperature coefficient components and parts, the first discharge tube, the second discharge tube and piezo-resistance, wherein:
Described positive temperature coefficient components and parts are connected with described the first discharge tube, described the second discharge tube is in parallel with described positive temperature coefficient components and parts and the first discharge tube, described the second discharge tube is connected with described piezo-resistance, described positive temperature coefficient components and parts are connected with described piezo-resistance, described the first discharge tube, positive temperature coefficient components and parts and described piezo-resistance form restricted flow passage, and described the second discharge tube and described piezo-resistance form the lightning current leakage path.
2. double-channel surge protection device as claimed in claim 1, is characterized in that, also is in series with thermal release device between described positive temperature coefficient components and parts and described piezo-resistance.
3. double-channel surge protection device as claimed in claim 1 or 2, is characterized in that, described the first discharge tube is ceramic discharge tube or gas discharge tube, and the second discharge tube is ceramic discharge tube or gas discharge tube.
4. double-channel surge protection device as claimed in claim 1 or 2, is characterized in that, described positive temperature coefficient components and parts are positive temperature coefficient resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220745644 CN202978261U (en) | 2012-12-26 | 2012-12-26 | Double-channel surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220745644 CN202978261U (en) | 2012-12-26 | 2012-12-26 | Double-channel surge protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202978261U true CN202978261U (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220745644 Expired - Fee Related CN202978261U (en) | 2012-12-26 | 2012-12-26 | Double-channel surge protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202978261U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767193A (en) * | 2015-03-11 | 2015-07-08 | 厦门大恒科技有限公司 | Current control assembly |
| CN109767956A (en) * | 2019-01-24 | 2019-05-17 | 隆科电子(惠阳)有限公司 | A kind of multichannel timesharing sequence disjunction structure suitable for surge protective device |
-
2012
- 2012-12-26 CN CN 201220745644 patent/CN202978261U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767193A (en) * | 2015-03-11 | 2015-07-08 | 厦门大恒科技有限公司 | Current control assembly |
| CN104767193B (en) * | 2015-03-11 | 2018-07-13 | 厦门大恒科技有限公司 | Current control assembly |
| CN109767956A (en) * | 2019-01-24 | 2019-05-17 | 隆科电子(惠阳)有限公司 | A kind of multichannel timesharing sequence disjunction structure suitable for surge protective device |
| CN109767956B (en) * | 2019-01-24 | 2024-06-07 | 隆科电子(惠阳)有限公司 | Multichannel time sequence breaking structure suitable for surge protection device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20191226 |