CN205123248U - Anti lightning surge circuit - Google Patents
Anti lightning surge circuit Download PDFInfo
- Publication number
- CN205123248U CN205123248U CN201520856740.5U CN201520856740U CN205123248U CN 205123248 U CN205123248 U CN 205123248U CN 201520856740 U CN201520856740 U CN 201520856740U CN 205123248 U CN205123248 U CN 205123248U
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- discharge tube
- protection device
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Abstract
The utility model discloses an anti lightning surge circuit, including firewire input port and zero line input, firewire input port and naturally between be provided with parallelly connected piezo -resistor RV1 and RV2, piezo -resistor RV2 and naturally between concatenated the 2nd circuit protector spare, piezo -resistor RV1 and naturally between concatenated a circuit protector spare, a circuit protector spare and naturally between still concatenated piezo -resistor RV3 and the 3rd circuit protector spare in the gas, the zero line input is connected to the remaining one end of the 2nd circuit protector spare, the utility model relates to a simply, safe in utilization, fault rate is low, and the greatly reduced incidence of catching fire.
Description
Technical field
The utility model relates to a kind of power protecting circuit, specifically relates to a kind of anti-lightning surge circuit.
Background technology
Along with the development of urban economy, the harm that induced lightening and mine transmitting device cause but increases greatly.Lightning rod on buildings in general can only direct striking thunder prevention in advance, and the induced lightening that powerful electromagnetic field produces and pulse voltage can slip into indoor and jeopardize the power consumption equipments such as TV, phone and electronic instrument.Particularly solar control instrument, due to the special circumstances of solar energy installation site, its stability in use is the emphasis that numerous developers pay close attention to always.The lightning surge of instant high-voltage and signal system surge are the major reasons causing instrument poor stability, and the main source of signal system surge voltage is indirect lightning strike, electromagnetic interference (EMI), radio interference and electrostatic interference.Metal object (as telephone wire) is subject to the impact of these interference signals, the data in transmission can be made to produce error code, the accuracy of impact transmission and transmission rate.How to design the key issue that lightning protection circuit becomes instrument research and development.
Modal electronic equipment harm not because direct stroke causes, but causes due to the current surge responded in power supply and communication line when thunderbolt occurs.On the one hand due to electronic equipment internal structure height integrated (VLSI chip), thus cause the level of withstand voltage, the resistance to overcurrent of equipment to decline, the ability to bear of thunder and lightning (comprising induced lightening and switching overvoltage surge) is declined, on the other hand because signal source path increases, system more easily suffers mine transmitting device than before.Surge voltage can scurry into computer equipment from the approach such as power line or holding wire, and we discuss respectively with regard to these two aspects:
(1) power surge
Power surge not only come from thunderbolt, all can produce power surge when the large load of short trouble, switching appears in electric power system, electrical network stretches a thousand li, no matter be thunderbolt or line surge odds is all very high.When there occurs thunderbolt apart from a distant place for your hundreds of kilometer, lightning surge is transmitted by the electrical network light velocity, through decay such as transformer stations, upper kilovolt may be still had to during your computer, this high pressure is very short, only have tens to a hundreds of microsecond, or be not enough to burn computer, but but there is very large infringement for the semiconductor element of computer inside, what the noise ratio just as old sound equipment was new will be greatly because inner member suffers damage the same, along with the intensification of these infringements, it is more and more unstable that computer also becomes gradually, or likely cause the loss of your significant data.GE company of the U.S. measure the low-voltage distribution wires (110V) such as general family, restaurant, apartment online in 10000 hours (about one year 0 two months) between the surge voltage number of times exceeding former operating voltage more than one times that occurs reach more than 800 times, wherein more than 300 secondary more than just having of 1000V.Such surge voltage is completely likely disposable to be damaged electronic equipment.
(2) signal system surge
The main source of signal system surge voltage is indirect lightning strike, electromagnetic interference, radio interference and electrostatic interference.Metal object (as telephone wire) is subject to the impact of these interference signals, the data in transmission can be made to produce error code, the accuracy of impact transmission and transmission rate.Get rid of the status transmission that these interference will improve network.
Based on above technological deficiency and situation, in the urgent need to designing a kind of switching power circuit of the parallel single-phase formula anti-lightning surge based on piezo-resistance and ceramic gas discharge tube.
Utility model content
The technical problems to be solved in the utility model overcomes existing defect, provides the anti-lightning surge circuit of a kind of simplicity of design, use safety, failure rate is low.
In order to solve the problems of the technologies described above, the utility model provides following technical scheme:
A kind of anti-lightning surge circuit; comprise live wire input and zero line input; described live wire input with naturally between be provided with piezo-resistance RV1 in parallel and RV2; described piezo-resistance RV2 and naturally between be serially connected with second circuit protection device; described piezo-resistance RV1 and naturally between be serially connected with the first circuit brake; described first circuit brake and naturally between be also serially connected with piezo-resistance RV3 and gas tertiary circuit protection device, the remaining one end of described second circuit protection device connects zero line input.
Further, described first circuit brake, second circuit protection device and tertiary circuit protection device are fuse.
Further, two parallel branches and naturally between a gas discharge tube is set.
Further, described first circuit brake, second circuit protection device and tertiary circuit protection device are gas discharge tube.
Further; described first circuit brake comprises the first fuse and the first gas discharge tube that are connected in series; described second circuit protection device comprises the second fuse and the second gas discharge tube that are connected in series, and described tertiary circuit protection device comprises the 3rd fuse and the 3rd gas discharge tube that are connected in series.
The beneficial effects of the utility model are:
The parallel single-phase formula anti-lightning surge circuit of piezo-resistance and ceramic gas discharge tube is applied on the power supply of instrument.Mainly be divided into lightning protection circuit part and switching power circuit part, circuit is simple, adopts combined type symmetric circuit, and common mode, difference touch full guard, can connect regardless of L, N end.Make piezo-resistance RV1 be positioned at paster rectification module front end respectively with power supply L, N parallel, mainly come clamper L, N voltage between lines, ground connection after piezo-resistance RV0, RV2 connect with ceramic gas discharge tube FD1, the power circuit of lightning protection instrument is formed with the switching power circuit of classics, employing piezo-resistance is in parallel, increase the service life, be separated with switching power circuit after piezo-resistance short-circuit failure, can not cause and catch fire.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for specification, is used from explanation the utility model, does not form restriction of the present utility model with embodiment one of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of the utility model embodiment one.
Fig. 2 is the structural representation of the utility model embodiment two.
Embodiment
Piezo-resistance is a kind of votage limit type protection device, by voltage clamping to a relatively-stationary magnitude of voltage, thus can realize the protection to late-class circuit.The failure mode mainly short circuit of piezo-resistance, certainly, when the overcurrent passed through is too large, also likely causes valve block to be opened a way by bursting.
Gas discharge tube is also a kind of circuit brake; but its operation principle is gas discharge; when two voltage across poles are enough large; interpolar gas gap is breakdown, is converted into conduction state, is similar to short circuit by original insulation state; but short circuit is different from; because two interpolars maintain lower voltage under conducting state, generally at 20-50V, late-class circuit can be protected well.
A kind of anti-lightning surge circuit; comprise live wire input and zero line input; described live wire input with naturally between be provided with piezo-resistance RV1 in parallel and RV2; described piezo-resistance RV2 and naturally between be serially connected with second circuit protection device; described piezo-resistance RV1 and naturally between be serially connected with the first circuit brake; described first circuit brake and naturally between be also serially connected with piezo-resistance RV3 and gas tertiary circuit protection device, the remaining one end of described second circuit protection device connects zero line input.
Further, described first circuit brake, second circuit protection device and tertiary circuit protection device are fuse.
Further, two parallel branches and naturally between a gas discharge tube is set.
Further, described first circuit brake, second circuit protection device and tertiary circuit protection device are gas discharge tube.
Further; described first circuit brake comprises the first fuse and the first gas discharge tube that are connected in series; described second circuit protection device comprises the second fuse and the second gas discharge tube that are connected in series, and described tertiary circuit protection device comprises the 3rd fuse and the 3rd gas discharge tube that are connected in series.
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the utility model, and be not used in restriction the utility model.
Embodiment one
According to Fig. 1, a kind of anti-lightning surge circuit, comprise live wire input and zero line input, described live wire input with naturally between be provided with piezo-resistance RV1 in parallel and RV2, described piezo-resistance RV2 and naturally between be serially connected with the second gas discharge tube G2, described piezo-resistance RV1 and naturally between be serially connected with the first gas discharge tube G1, described first gas discharge tube G1 and naturally between be also serially connected with piezo-resistance RV3 and gas the 3rd gas discharge tube G3, described second gas discharge tube G2 is three-end air discharging pipe, second remaining one end of gas discharge tube G2 connects zero line input.
Embodiment two
According to Fig. 2, a kind of anti-lightning surge circuit, comprise live wire input and zero line input, described live wire input with naturally between be provided with piezo-resistance RV1 in parallel and RV2, described piezo-resistance RV2 and naturally between be serially connected with the second fuse TF2, described piezo-resistance RV1 and naturally between be serially connected with the first fuse TF1, described first fuse TF1 and naturally between be also serially connected with piezo-resistance RV3 and gas the 3rd fuse TF3, described second remaining one end of fuse TF2 connects zero line input.
Further, two parallel branches and naturally between a gas discharge tube G is set, two parallel branches refer to the branch road at piezo-resistance RV1 and piezo-resistance RV2 place respectively.
A kind of deformation under the present embodiment is; described first circuit brake comprises the first fuse and the first gas discharge tube that are connected in series; described second circuit protection device comprises the second fuse and the second gas discharge tube that are connected in series, and described tertiary circuit protection device comprises the 3rd fuse and the 3rd gas discharge tube that are connected in series.
Use lightning protection circuit time must be noted that some:
1. discharge tube add the normal work that can not affect circuit, this will ensure that the lower limit of the DC breakdown voltage of discharge tube must higher than the maximum normal working voltage of circuit.Determine the nominal DC breakdown voltage value of required discharge tube accordingly.
2. determine the highest instantaneous voltage value that circuit can bear, guarantee that the impact flashover voltage value of discharge tube must lower than this value.To guarantee that the response speed of discharge tube, faster than the response speed of circuit, does sth. before others have a chance to overvoltage Limiting at safety value when moment overvoltage comes interim.This is a most important index of discharge tube.
3., according to the impulse current intensity may scurried in circuit, determine that the shock-resistant current capacity that selected discharge tube must reach (as: generally selects more than 10kA grade in outdoor; 5kA grade is generally selected at inlet end; About 1kA grade is generally selected) at device end place.
4. after having served as loss of voltage, guarantee that discharge tube extinguishes in time, in order to avoid affect the normal work of circuit.This just requires that the maintenance voltage excessively of discharge tube is high as far as possible, to ensure that regular link operating voltage can not cause the constant conduction (i.e. afterflow problem) of discharge tube.
If what 5. overvoltage continued is chronic, the long-time action of gas discharge tube will produce very high heat.The damage of the proterctive equipment caused to prevent this heat or terminal equipment is simultaneously also in order to prevent any possible fire; gas discharge tube now must mix suitable short-circuiting means, and we are referred to as FS device (Fail-safe i.e. " abating protection device ").
Last it is noted that these are only preferred embodiment of the present utility model, be not limited to the utility model, although be described in detail the utility model with reference to previous embodiment, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (5)
1. an anti-lightning surge circuit; it is characterized in that; comprise live wire input and zero line input; described live wire input with naturally between be provided with piezo-resistance RV1 in parallel and RV2; described piezo-resistance RV2 and naturally between be serially connected with second circuit protection device; described piezo-resistance RV1 and naturally between be serially connected with the first circuit brake; described first circuit brake and naturally between be also serially connected with piezo-resistance RV3 and gas tertiary circuit protection device, the remaining one end of described second circuit protection device connects zero line input.
2. a kind of anti-lightning surge circuit according to claim 1, is characterized in that, described first circuit brake, second circuit protection device and tertiary circuit protection device are fuse.
3. a kind of anti-lightning surge circuit according to claim 2, is characterized in that, two parallel branches and naturally between a gas discharge tube is set.
4. a kind of anti-lightning surge circuit according to claim 1, is characterized in that, described first circuit brake, second circuit protection device and tertiary circuit protection device are gas discharge tube.
5. a kind of anti-lightning surge circuit according to claim 1; it is characterized in that; described first circuit brake comprises the first fuse and the first gas discharge tube that are connected in series; described second circuit protection device comprises the second fuse and the second gas discharge tube that are connected in series, and described tertiary circuit protection device comprises the 3rd fuse and the 3rd gas discharge tube that are connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520856740.5U CN205123248U (en) | 2015-10-28 | 2015-10-28 | Anti lightning surge circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520856740.5U CN205123248U (en) | 2015-10-28 | 2015-10-28 | Anti lightning surge circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205123248U true CN205123248U (en) | 2016-03-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520856740.5U Expired - Fee Related CN205123248U (en) | 2015-10-28 | 2015-10-28 | Anti lightning surge circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205123248U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896512A (en) * | 2015-10-28 | 2016-08-24 | 苏州研工电子科技有限公司 | Lightning stroke-proof surge circuit |
| CN109755931A (en) * | 2017-11-06 | 2019-05-14 | 东莞市阿甘半导体有限公司 | A kind of AC power source surge protective device and electronic equipment |
| CN112531668A (en) * | 2019-09-17 | 2021-03-19 | 青岛海尔空调电子有限公司 | Surge absorption circuit for single-phase air conditioning system |
-
2015
- 2015-10-28 CN CN201520856740.5U patent/CN205123248U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896512A (en) * | 2015-10-28 | 2016-08-24 | 苏州研工电子科技有限公司 | Lightning stroke-proof surge circuit |
| CN109755931A (en) * | 2017-11-06 | 2019-05-14 | 东莞市阿甘半导体有限公司 | A kind of AC power source surge protective device and electronic equipment |
| CN112531668A (en) * | 2019-09-17 | 2021-03-19 | 青岛海尔空调电子有限公司 | Surge absorption circuit for single-phase air conditioning system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Suzhou Kinsoon Electronic Technology Co., Ltd. Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Suzhou Kinsoon Electronic Technology Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| 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: 20160330 Termination date: 20181028 |