CN201440353U - Novel lightning protector safety tripping device - Google Patents
Novel lightning protector safety tripping device Download PDFInfo
- Publication number
- CN201440353U CN201440353U CN2009201480886U CN200920148088U CN201440353U CN 201440353 U CN201440353 U CN 201440353U CN 2009201480886 U CN2009201480886 U CN 2009201480886U CN 200920148088 U CN200920148088 U CN 200920148088U CN 201440353 U CN201440353 U CN 201440353U
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- leakage current
- lightning protection
- tripping
- signal processing
- protection component
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Abstract
The utility model provides a novel lightning protector safety tripping device which comprises a tripping switch, a leakage current sampler, an actuation mechanism and a signal processing circuit, wherein the tripping switch and the leakage current sampler are sequentially connected in the primary loop circuit of the lightning protection component in series, the leakage current sampler is electrically connected with the signal processing circuit, the signal processing circuit is connected with the actuation mechanism, and the actuation mechanism is connected with the tripping switch. The novel lightning protector safety tripping device overcomes the problems that the thermal tripping manner in prior art has large current tripping and unreliable tripping situations, and accordingly protects the safety of the electrical appliances more effectively.
Description
Technical field
The utility model belongs to power electronic technology, is specifically related to a kind of brand-new lightning protection device safety trip gear, is particularly useful in the lightning-protection system of big through-current capacity.
Background technology
As everyone knows, modern society enters the information age, and the development of microelectronic product and application have been penetrated into each corner of social production and life.The basis of modern microelectronic product is semiconductor integrated circuit technology and employed therein semiconductor element.In addition, characters at low voltage ranges is an outstanding advantage of semiconductor element.Yet also this outstanding advantage just becomes an equally very outstanding weakness of semiconductor element in another side.That is, semiconductor element antisurge poor ability is easy to damage because of the electromagnetic surge of being struck by lightning or other reason causes.
At the problem of electromagnetic surge, a very fast new technology, the promptly modern shocking preventing technology of having risen again.Modern shocking preventing technology is different from traditional shocking preventing technology part and is: what traditional shocking preventing technology used the lightning rod strick precaution is direct lightning strike, and its working method is to provide leakage path for direct lightning strike; And modern shocking preventing technology is at the induction thunder; it is the leakage path that adopts various non-linear lightning protection components to set up a surge current at the power supply or the signal port of protected equipment; surge voltage is limited within the margin of safety, thereby reaches protection electronic product purpose of safety.
Modern thunder resisting equipment can be protected the safety of various microelectronic products effectively.But a fatal weakness is arranged also himself, Here it is in case the energy of external surge voltage has surpassed the ability to bear of lightning protection component, perhaps because long-term use component ageing, lightning protection component will produce leakage current, will catching fire when leakage current increases to a certain degree, thereby make lightning protection component become a potential safety hazard, obviously this is a problem that must solve, otherwise has just lost the value and significance that uses as the lightning protection device of security device.
In order to solve the safety problem of lightning protection component self, the professional person of lightning protection industry has done a large amount of work for many years, has carried out a large amount of development tests, has designed multiple lightning protection device safety device.The working method of these safety devices all is that the lightning protection component and the circuit that will damage or lose efficacy disconnect disengaging, prevents the catching fire of lightning protection component, so also it is called trip gear.The trip gear of at present domestic and international lightning protection device, although though its structural design is multifarious, but all be based on hot dropout principle bar none, promptly when lightning protection component damages, originally the lightning protection component resistance that was in high-impedance state begins to reduce, and the lightning protection component that does not almost have electric current to pass through under the normal condition begins that electric current is arranged, and (we are called leakage current with this electric current) passes through.Leakage current can present the trend that progressively increases, and is slow increase sometimes, is the rapid increase of avalanche type sometimes.Leakage current will inevitably make the lightning protection component heating through lightning protection component.At present, all trip gears all are that the heating when utilizing lightning protection component to damage removes to heat a meltable solder joint, by flexible member (shell fragment or spring) it are opened circuit again after the meltable solder joint fusing, thereby make lightning protection component break away from power supply, avoid catching fire.Obviously, such dropout has a process, needs a period of time.The length of time depends primarily on the process of meltable solder joint heat fused, and this at first depends on the energy and the programming rate of thermal source certainly, and is simultaneously also relevant with size, position, the heat conducting mode of meltable solder joint.
Based on above-mentioned; the dropout mode that generally adopts (everybody is called heat traditionally and threads off) has a deadly defect at present; heat that Here it is is threaded off needs a period of time by the inflammable solder joint of lightning protection component damage heating indirect to its fusing; certainly lightning protection component self is warming up to burning also needs the time; the former is long if the latter is short, and then trip gear will lose protective effect.Further be explained as follows:
(1) if lightning protection component is to damage slowly, leakage current progressively increases, meltable solder joint is progressively heated, the lightning protection component near-synchronous of the temperature of meltable solder joint and damage raises, because the fusion temperature of meltable solder joint is lower than the temperature on fire of lightning protection component, in this case, trip gear all can action message, guarantees to thread off smoothly;
(2) if still lightning protection component is that avalanche type is damaged, leakage current increases to the limit suddenly, meltable solder joint then can occur and come not anxious heat fused, and when trip gear did not also move, lightning protection component is catching fire.
Here it is insider " little current-release is easy, greatly the problem of current-release difficulty " often said, the insecure reason of the ubiquitous big current-release of just present lightning protection device.
In addition, also there is another problem in present trip gear, and Here it is under the continuous impact of surge current, and the flexible member of trip gear may tiredly be degenerated and be followed the string, can't be with the circuit disjunction when really needing to thread off.
The utility model content
At the deficiencies in the prior art, the utility model technological invention people repeatedly tests and has studied and proposed brand-new lightning protection device safety trip gear.
Lightning protection device safety trip gear comprises dropout switch, leakage current sampler, actuator, signal processing circuit, wherein on the major loop of lightning protection component, be in series with dropout switch and leakage current sampler successively, leakage current sampler and signal processing circuit electrically connect, signal processing circuit is connected with actuator, and actuator is connected with the dropout switch.
Between dropout switch and leakage current sampler, be connected in series with piezo-resistance.
Use above-mentioned lightning protection device safety trip gear, have the following advantages:
It is irrelevant with heat and heating, only depends on leakage current.As long as leakage current is greater than a certain gauge, trip gear will move immediately, does not have the problem of heating and meltable solder joint fusing.And the leakage current numerical value of trip gear action can be made stipulations according to different situations.The time of dropout action is generally less than 0.1S, and the faster dropout action of speed that leakage current increases is also faster.This is that a kind of lightning protection component inherently safe that can fully guarantee fully is different from the trip gear of existing mode fully.
Brief Description Of Drawings
Fig. 1 is the foundation lightning protection device safety trip gear that is applied in the single phase circuit of the present utility model;
Fig. 2 is the foundation lightning protection device safety trip gear that is applied in the three-phase circuit of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the lightning protection device safety trip gear that the utility model proposes is described in detail.
Fig. 1,2 is respectively to according to the lightning protection device safety trip gear that is applied in single-phase, the three-phase circuit of the present utility model.The major part of this lightning protection device safety trip gear comprises dropout switch, leakage current sampler, actuator, signal processing circuit, wherein on the major loop of lightning protection component, be in series with dropout switch and leakage current sampler successively, leakage current sampler and signal processing circuit electrically connect, signal processing circuit is connected with actuator, and actuator is connected with the dropout switch.In single phase circuit, L is a live wire, and N is a zero line.In three-phase circuit, L
1, L
2, L
3Be live wire, N is a zero line.
Between dropout switch and leakage current sampler, be connected in series with piezo-resistance.
This lightning protection device safety trip gear is different from the trip gear of existing mode fully.This apparatus features is that it is irrelevant with heat and heating, only depends on leakage current.As long as leakage current is greater than a certain gauge, trip gear will move immediately, does not have the problem of heating and meltable solder joint fusing.And the leakage current numerical value of trip gear action can be made stipulations according to different situations.The time of dropout action is generally less than 0.1S, and the faster dropout action of speed that leakage current increases is also faster.This is that a kind of lightning protection component inherently safe that can fully guarantee fully is different from the trip gear of existing mode fully.Only need dropout operating current that we select much smaller than the current value that can make the lightning protection component burning here, just can guarantee the safety of system.In fact this point is easy to accomplish, and generally we can be set in below the 30mA dropout leakage current, and can make the leakage current value that lightning protection component burns rapidly be worth big 1～2 order of magnitude than this at least.Little piezo-resistance with Φ 20 is an example, under the 50mA leakage current condition, also wants just can blaze up more than the 10S.Even the leakage current avalanche type increases, the needed time of the process of lightning protection component catching fire is also much larger than time of trip gear action.Thereby this method more can guarantee reliable dropout under big current condition, compares with current methods, and incomparable advantage is arranged.
Be interpreted as in more detail:
(1) be in series with a dropout switch in the major loop of lightning protection component, the characteristics of this switch are that contact resistance is little, can by with the suitable surge current of the maximum through-current capacity of lightning protection component, breaking speed is fast.
(2) also be in series with a leakage current sampler in the lightning protection component major loop, this comes down to a compact simplified straight-through current transformer.
(3) be connected with a signal processor in that the leakage current sampler is secondary, be responsible for receiving the signal of handling the leakage current sampler, and send to actuator and to drive order.
(4) contact of dropout switch links to each other with an actuator, the disjunction of actuating mechanism controls switch, and the order of actuator's acknowledge(ment) signal processor makes the switch disjunction in needs.
The action step of this lightning protection device safety trip gear is as follows:
(1) under the normal condition, the dropout switch is in closure state, and each lightning protection component leakage current all less than 2 μ A, can be ignored for the leakage current sampler.
(2) when the lightning protection component damage, when leakage current began to increase, the leakage current sampler can be exported a current signal that is proportional to leakage current numerical value, this signal entering signal treatment circuit.
(3) signal processing circuit can be discerned the character and the numerical value of signal of input, when confirming as the leakage current signal, and has numerically reached our the dropout boundary of regulation in advance, then sends the instruction of threading off to actuator immediately.
(4) actuator receives instruction and makes the disjunction of dropout switch immediately.
Wherein,, be meant mainly when surge voltage acts on lightning protection component, have surge current on the lightning protection component and pass through that this surge current also can make the leakage current sampler secondaryly has output about the problem of signal processing circuit to the identification of the character of signal.But for such signal, signal processing circuit can not be sent the instruction of threading off, and this just requires signal processing circuit that what must have the ability to discern is real leakage current signal.
In fact, the identification of signal is not difficult, because surging signal and leakage current signal have very big difference on waveform and frequency.The leakage current signal is that 50 weeks of standard are sinusoidal wave, and surging signal is typical microsecond level pulse signal.Utilize this difference, signal processing circuit is easy to the two is separated, and just carries out dropout when having only the leakage current signal that really reaches the regulation boundary to occur, and surge current by the time necessarily can not thread off.
In addition, as the important indicator in this system, the response speed of this system depends primarily on the responsiveness of actuator, and the operate time of leakage current sampler and signal processor is with respect to ignoring the operate time of actuator.The response speed of whole system is generally less than 0.1S, and leakage current is healed big response speed sooner.This speed is for preventing that the lightning protection component catching fire from having abundant leeway.
This device occasion of suitable use is the lightning-protection system of big through-current capacity, and the present just dropout technology of the lightning-protection system of big through-current capacity is difficult to the field that solves.
In addition, although the clear in conjunction with the accompanying drawings technical scheme that the utility model proposes that described in detail, but with reference to preferred embodiment of the present utility model, this area those skilled in the art be appreciated that, under the situation of the spirit and scope of the present utility model that do not deviate from the claims definition, can in form and details, make various modifications.Therefore, all should fall within the protection range of the present utility model with reference to the various modifications that technical solutions of the utility model are made.
Claims (2)
1. a brand-new lightning protection device safety trip gear comprises dropout switch, leakage current sampler, actuator, signal processing circuit, it is characterized in that on the major loop of lightning protection component, being in series with successively dropout switch and leakage current sampler, leakage current sampler and signal processing circuit electrically connect, signal processing circuit is connected with actuator, and actuator is connected with the dropout switch.
2. according to the lightning protection device safety trip gear of claim 1, it is characterized in that between dropout switch and leakage current sampler, also being connected in series with piezo-resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201480886U CN201440353U (en) | 2009-04-09 | 2009-04-09 | Novel lightning protector safety tripping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201480886U CN201440353U (en) | 2009-04-09 | 2009-04-09 | Novel lightning protector safety tripping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201440353U true CN201440353U (en) | 2010-04-21 |
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ID=42545016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201480886U Expired - Fee Related CN201440353U (en) | 2009-04-09 | 2009-04-09 | Novel lightning protector safety tripping device |
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| Country | Link |
|---|---|
| CN (1) | CN201440353U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106385017A (en) * | 2016-09-23 | 2017-02-08 | 郑州云海信息技术有限公司 | Circuit protection device and system |
-
2009
- 2009-04-09 CN CN2009201480886U patent/CN201440353U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106385017A (en) * | 2016-09-23 | 2017-02-08 | 郑州云海信息技术有限公司 | Circuit protection device and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liu Zongqi Inventor before: Liu Hongqi |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: LIU HONGQI TO: LIU ZONGQI |
|
| 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: 20100421 Termination date: 20180409 |