CN104242284A - Equipotential lightning protection device - Google Patents
Equipotential lightning protection device Download PDFInfo
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- CN104242284A CN104242284A CN201410448267.7A CN201410448267A CN104242284A CN 104242284 A CN104242284 A CN 104242284A CN 201410448267 A CN201410448267 A CN 201410448267A CN 104242284 A CN104242284 A CN 104242284A
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Abstract
The invention discloses an equipotential lightning protection device. The equipotential lightning protection device comprises a surge suppression circuit, a lightning protection circuit, a surge energy absorbing circuit, an isolation protection circuit and an EMI protection circuit, wherein the surge suppression circuit, the lightning protection circuit, the surge energy absorbing circuit, the isolation protection circuit and the EMI protection circuit are sequentially connected in series. The lightning protection circuit comprises a first inductor and a second inductor which are connected in series, a plurality of gap discharging tubes are connected between the input end of the first inductor and the grounding ends of the circuits in series, voltage-limiting components are connected between the output end of the first inductor and the grounding ends of the circuits in series, and voltage-limiting components are connected between the output end of the second inductor and the grounding ends of the circuits in series. The equipotential lightning protection device is good in lightning protection effect, and implementation is convenient.
Description
Technical field
The present invention relates to anti-thunder technical field, in particular, relate to a kind of equipotential lightning protection device.
Background technology
Over the past thousands of years, the protection of the mankind to thunder and lightning is mainly two large protection methods: one is that insulation is lightning-arrest, insulation resistance thunder, and the lightning-arrest example of insulation is exactly that a large amount of remnants ancient building is built on the fabulous ground of insulation, over the past thousands of years not by broken by lightning, Here it is adopts the lightning-arrest mode of insulation; Another kind is exactly draw thunder to enter ground, the defensive lightning rod of direct lightning strike, lighting proof strip, lightning conduction are exactly typically draw the mode that thunder enters ground, the lightning protection for power supply of induced lightening, siganl thunder-proof device, Jiu Shi total its thought is released lightning current into ground, earial drainage lets out energy exactly as everybody knows, lightning current is released into ground, thus reaches the object of lightning protection.
In the protection of induced lightening, power supply standard back warp often can mention multistage protection, such as: a building building, the lightning surge experienced under being in different thunder and lightning electromagnetic environments is different, protect the equipment in building, present international and domestic common practice, be exactly that lightning surge one-level one-level is protected, multistage earial drainage, Multi-stage pressure limiting, come satisfied last residual voltage lower than equipment can bear withstand voltage;
Equipotential link: equipment and device expose the substantially equal electrical connection of the current potential that can arrive bottom part.
Lightning protection equipotential link: by all metal objects separated directly with connecting problem or being connected on lightning protection device to reduce the potential difference that lightning current causes through surge protector.Equipotential link comprises equipotential on arrester circuit, lightning protection circuit equipotential, realizes the effect of equalized voltage; Equipotential comprises the equipotential link of unit, lightning protection device simultaneously.
Draw main thought and the means of defence of the lightning protection of the Lei Rudishi world today, the direct lightning strike hit at building, with the induced lightening on circuit by drawing thunder lightning rod, lightning protection device is released into ground, draw thunder to need with entering to do the earth mat meeting lightning protection requirement, lightning protection for power supply General Requirements earth resistance is less than 10 ohm, signal lighting protection product General Requirements earth resistance is less than 4 ohm, do a pith of lightning protection grounding network engineering often, also be the aspect that cost is larger, reach the ground network ground resistance met the demands, cycle is long, cost is large, quantities is large, strongly professional, these are average families, vast rural area, remote mountain areas lightning protection is difficult to the major reason that every household installs lightning protection device.
Summary of the invention
Technical problem to be solved by this invention is to provide the better and convenient equipotential lightning protection device implemented of a kind of lightning protection effect.
The object of the invention is to be achieved through the following technical solutions:
A kind of equipotential lightning protection device, comprises the surge restraint circuit, lightning protection circuit, surge energy absorbing circuit, isolation protective circuit and the EMI protective circuit that are connected in series successively;
Described lightning protection circuit comprises the first inductance and second inductance of series connection, is serially connected with Multiple level without afterflow without leakage current discharge tube between the input of described first inductance and circuit ground end; Votage limit type components and parts are serially connected with between the output of described first inductance and circuit ground end; Votage limit type components and parts are serially connected with between the output of described second inductance and circuit ground end.
Further, described surge energy absorbing circuit comprises high-voltage pulse electric capacity element.
Further, described isolation protective circuit adopts isolating transformer.
Further, described EMI circuit comprises the common mode choke and differential mode choke coil that are connected in series successively, is connected with differential mode capacitor between the live wire of described common mode choke input and zero line; Common mode capacitance is serially connected with between the live wire of described differential mode choke coil output and zero line.
Further, described common mode choke comprises the first inductance being serially connected in live wire, is serially connected in the second inductance of zero line; Shown differential mode choke coil comprises the 3rd inductance be connected in series with the first inductance, the 4th inductance be connected in series with the second inductance; Described common mode capacitance comprises the second electric capacity, the 3rd electric capacity and the 4th electric capacity; Between the live wire that described second electric capacity is directly serially connected in common mode choke output and zero line; Described 3rd electric capacity and the 4th capacitance series are between the live wire and zero line of common mode choke output; The junction ground connection of described 3rd electric capacity and the 4th electric capacity.
Further, described surge energy absorbing circuit comprises high-voltage pulse electric capacity element; Described isolation protective circuit adopts isolating transformer; Described EMI circuit comprises the common mode choke and differential mode choke coil that are connected in series successively, is connected with differential mode capacitor between the live wire of described common mode choke input and zero line; Common mode capacitance is serially connected with between the live wire of described differential mode choke coil output and zero line;
Described common mode choke comprises the first inductance being serially connected in live wire, is serially connected in the second inductance of zero line; Shown differential mode choke coil comprises the 3rd inductance be connected in series with the first inductance, the 4th inductance be connected in series with the second inductance; Described common mode capacitance comprises the second electric capacity, the 3rd electric capacity and the 4th electric capacity; Between the live wire that described second electric capacity is directly serially connected in common mode choke output and zero line; Described 3rd electric capacity and the 4th capacitance series are between the live wire and zero line of common mode choke output; The junction ground connection of described 3rd electric capacity and the 4th electric capacity.
Present invention incorporates insulation lightning-arrest, suppress resistance thunder, equipotential, isolation, all press, thunder energy consumption absorbs, the principle of differential mode common mode full guard, design a kind of equipotential accurate level of protection insulating power supply lightning protection device, this lightning protection device integrates various advantage, adopt insulation lightning-arrest, thunder and lightning suppresses principle, use and all press, isolating means, have employed inductive surge principle of absorption, differential mode common mode full protection modes, Pyatyi protective circuit before and after composition, solve conventional lightning protection device comprehensively and there is such-and-such problem, simultaneously lightning protection device it goes without doing Special grounding earth mat, thus save a large amount of manpower and materials, lightning protection device solves average family in the past and uses, remote mountain areas uses the economic constraints of lightning protection device, limitation of the technology, region restricts, soil property restriction etc., become rising of every household, every household can be used, solid basis has been established for lightning protection device popularizes to promote.The invention solves equipotential circuit in the past and only do a full mould protection, lack energy ezpenditure absorbing circuit, not considering that thunder and lightning shows at all is lightning current, and lightning current is the invasion of a kind of energy, and what solve energy digests and assimilates problem; Solve and only had stage circuit in the past, rear class level of protection is too high, the shortcoming of protected effect difference; Solve and only do common mode protection in lightning protection, do not do the shortcoming of differential mode protection.Special multi-level protection circuit solves the shortcoming that level of protection is too high, discharge capacity is too small, the response time is slow of simple one-level lightning protection circuit or two-stage lightning protection circuit in the past; this lightning protection device adopts multistage; various feature components and parts are with the use of the requirement that both can design satisfied different discharge capacity; final stage lightning protection circuit response time speed is fast simultaneously; multi-level pmultistage circuit coordinates; residual voltage is low, meets a ultra-low residual pressure, reaches desirable protection effect.The present invention adopts buffer circuit, does not stay dead angle to lightning protection, overvoltage protection, really accomplishes to protect perfect state.Adopt EMI to solve circuit, solve the impact of various interference on power frequency supply, purified power environment, the sinusoidal ac of outputting standard.Lightning protection device does not need specialize earth mat, is not strict with ground network ground resistance, has stopped because lightning protection earth potential strikes back the problem brought.
Accompanying drawing explanation
Fig. 1 is the principle schematic of lightning protection device of the present invention;
Fig. 2 is the principle schematic of lightning protection circuit of the present invention;
Fig. 3 is the filter effect schematic diagram of lightning protection circuit of the present invention;
Fig. 4 is the principle schematic of EMI circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, the invention will be further described.
As shown in Figure 1, lightning protection device of the present invention comprises the surge restraint circuit, lightning protection circuit, surge energy absorbing circuit, isolation protective circuit and the EMI circuit that are connected in series successively;
As shown in Figure 2, lightning protection circuit comprises the first inductance and second inductance of series connection, is serially connected with Multiple level discharge tube between the input of described first inductance and circuit ground end; Votage limit type components and parts are serially connected with between the output of described first inductance and circuit ground end; Be serially connected with votage limit type components and parts between the output of described second inductance and circuit ground end, lightning protection circuit of the present invention see Fig. 3, as seen by three-level protective, can finally reach ultralow residual voltage to the effect of lightning surge electric current.
Described surge energy absorbing circuit comprises high-voltage pulse electric capacity element.Described isolation protective circuit adopts isolating transformer.
As Fig. 4, described EMI circuit comprises the common mode choke and differential mode choke coil that are connected in series successively, is connected with differential mode capacitor between the live wire of described common mode choke input and zero line; Common mode capacitance C1 is serially connected with between the live wire of described differential mode choke coil output and zero line.Described common mode choke comprises the first inductance L 1 being serially connected in live wire, is serially connected in the second inductance L 2 of zero line; Shown differential mode choke coil comprises the 3rd inductance L 3 be connected in series with the first inductance, the 4th inductance L 4 be connected in series with the second inductance; Described common mode capacitance comprises the second electric capacity C2, the 3rd electric capacity C3 and the 4th electric capacity C4; Described second electric capacity is directly serially connected between the live wire L of common mode choke output and zero line N; Described 3rd electric capacity and the 4th capacitance series are between the live wire and zero line of common mode choke output; The junction ground connection of described 3rd electric capacity and the 4th electric capacity.
Present invention incorporates insulation lightning-arrest, suppress resistance thunder, equipotential, isolation, all press, thunder energy consumption absorbs, the principle of differential mode common mode full guard, design a kind of equipotential accurate level of protection insulating power supply lightning protection device, this lightning protection device integrates various advantage, adopt insulation lightning-arrest, thunder and lightning suppresses principle, use and all press, isolating means, have employed inductive surge principle of absorption, differential mode common mode full protection modes, Pyatyi protective circuit before and after composition, solve conventional lightning protection device comprehensively and there is such-and-such problem, simultaneously lightning protection device it goes without doing Special grounding earth mat, thus save a large amount of manpower and materials, time saving and energy saving, lightning protection device, solve average family in the past to use, remote mountain areas uses the economic constraints of lightning protection device, limitation of the technology, region restricts, soil property restriction etc., rising of every household in future, every household can be used, solid basis has been established for lightning protection device popularizes to promote.The invention solves equipotential circuit in the past and only do a full mould protection, lack energy ezpenditure absorbing circuit, not considering that thunder and lightning shows at all is lightning current, and lightning current is the invasion of a kind of energy, and what solve energy digests and assimilates problem; Solve and only had stage circuit in the past, rear class level of protection is too high, the shortcoming of protected effect difference; Solve and only do common mode protection in lightning protection, do not do the shortcoming of differential mode protection.Special multi-level protection circuit solve simple one-level lightning protection circuit or two-stage lightning protection circuit level of protection too high; discharge capacity is little; response time is restricted; lightning protection device adopts different components and parts both can design the requirement of satisfied different discharge capacity; final stage lightning protection circuit response time speed is fast simultaneously, and multi-level pmultistage circuit coordinates, and residual voltage is low; meet a ultra-low residual pressure, reach desirable protection effect.The present invention adopts buffer circuit, does not stay dead angle to lightning protection, overvoltage protection, really accomplishes to protect perfect state.Adopt EMI to solve circuit, solve the impact of various interference on power frequency supply, purified power environment, the sinusoidal ac of outputting standard.Lightning protection device does not need specialize earth mat, does not do requirement to ground network ground resistance, has stopped because lightning protection earth potential strikes back the problem brought.
Below the circuit of lightning protection part and principle are described in detail:
The first order is surge restraint circuit: suppress resistance thunder to adopt high-frequency suppressing principle; Can be normal through for power current, then hinder wave arrestment to weaken waveform for surge current, affect the direction of propagation of lightning surge, and then affect the generation of induction lightening, radio-frequency suppressor impedance ground=2 π FL; We know: lightning surge electric current is mainly distributed in low frequency part, and successively decreases along with the rising of frequency.The second level is lightning protection circuit: can bear direct lightning strike I class 10/350 μ S waveform lightning surge, also can bear induced lightening II class 8/20 μ S waveform lightning surge, more can protect all kinds of potential pulse, and protection comprehensively, the integrated three grades of protection against lightning surges of lightning protection circuit, discharge capacity is large, residual voltage is ultralow, reaction speed is fast, both there is the discharge capacity of B level lightning protection device, meet C again, the nanosecond reaction speed of D level lightning protection device and level of protection, lightning protection device designs three grades of surge protection circuits, the first order adopts switching component Multiple level discharge tube, components and parts without leakage current without afterflow, ensure that the useful life of product, discharge capacity super large, the second level adopts votage limit type components and parts, components and parts are without afterflow, the third level adopts high power Transient Suppression Diode, cooperation at different levels adopts special decoupling mechanism, really meeting the first order can for letting out, second level pressure limiting, the third level drops to lowermost level residual voltage residual voltage, reach the residual voltage level of the static starting resistor of components and parts, the ultra-low residual pressure feature requirement of siganl thunder-proof device product can be reached, lightning protection device solves the matching problem of multistage lightning protection simultaneously, lightning protection circuit adopts differential mode common mode full guard.Special multistage protection, really achieves accurate residual voltage value and ultralow residual voltage value! Solve original lightning protection device, residual voltage fluctuation is large, and clamp is inaccurate, the shortcoming of protected effect difference; In circuit, the different components and parts of lightning protection part adopt quarantine measures altogether, prevent final circuit from fighting back at common earth-return and damage.
The third level is surge energy absorbing circuit: adopt special high-voltage pulse electric capacity element.The pulsed capacitance type selecting of certain value is wanted according to induced lightening quantity of electric charge design.Wherein capacitance energy storage Q=CU=It computing formula, needs to be equipped with capacity for energy absorption according to design.
The fourth stage is isolation protective circuit: it adopts isolating transformer, and select corresponding withstand voltage isolating transformer according to prime lightning protection, load current as required selects corresponding transformer.
Level V is EMI protective circuit: in circuit, the first inductance L 1 and the second inductance L 2 common mode choke, on a closed high permeability iron core, is wound with two around to identical coil.When common mode current flows through two coils with equidirectional simultaneously, the magnetic flux that two coils produce is that direction is identical, and have the effect mutually strengthened, the common code impedance of each coil is improved, and common mode current weakens greatly, has very strong inhibitory action to common mode disturbances.Under differential mode interference signal function, disturbance current produces the contrary magnetic flux in direction, cancels out each other in the core which, makes coil inductance almost nil, do not have inhibitory action to difference mode signal.First inductance L 1, second inductance L 2 and electric capacity C3, C4 forms common mode disturbances Suppression network.
In circuit, L3 is differential mode choke coil, and on high permeability iron core, independent coiling is formed, and has high impedance to high-frequency differential-mode current and surge current, minimum to the impedance of low frequency (power frequency) electric current.Electric capacity C1 elimination differential-mode current, forms differential mode interference Suppression network with L1.
Lightning protection device can also have following functions simultaneously: the function 1, arranging band waterproof as required; 2, there is flexible outward appearance building form, box outward appearance can be adopted, be installed as box wall hanging or mounting means, also can integrated metal appearance structure, can be that screw is fixed, or guide tracked mounting means, also can be integrated module be structure, guide tracked installation.3, lightning protection device arranges remote signalling output function; 4, lightning protection device is according to the lightning protection device of the size design respective belt load capacity of bearing power; 5, lightning protection device is provided with overcurrent overheat tripping function.Fail safe is high.6, lightning protection device both can apply to single-phase source system, also went for three-phase alternating current system, was applicable to AC power supply system, also go for DC power system; 7, lightning protection device has power supply instruction, deterioration instruction, ground connection instruction, deteriorated alarm function etc.; 8, can there is the situation chosen wherein partial circuit and form other specific lightning protection device in lightning protection device.9, with lightning protection intelligent monitoring function: the intelligent monitoring of lightning protection device, various operating states for lightning protection device are monitored, intelligent monitoring part comprises ceraunograph counting unit and lightning protection device status display unit, ceraunograph counting unit has counting thunder function, thunderbolt energy size is born by each institute of record lightning protection device, record thunderbolt time of origin, record thunder and lightning is just dodging and negative sudden strain of a muscle, the temperature of record lightning protection device place environment and humidity, lightning stroke counter adopts intelligent single-chip microcomputer, possesses hold function simultaneously, prevent from having a power failure, the problem that enumeration data is lost; Lightning protection device status display unit has lightning protection instruction, ground connection instruction, power supply deixis, the state of lightning protection instruction record lightning protection part, and normally show green, deterioration display is red, the whether effective grounding of ground connection instruction main instruction lightning protection device; Power light shows each phase power supply status, and power supply is green, and then not bright light when not having an electricity, have audible alarm and function, lightning protection device has again remote signalling output function simultaneously, real-time implementation remote monitoring function.Closely, the realtime monitoring of lightning protection device, transmits unobstructed, rationally distributed, and wiring aspect, antijamming capability is strong for lightning protection part and the good teamwork of intelligent monitoring part.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (6)
1. an equipotential lightning protection device, is characterized in that, comprises the surge restraint circuit, lightning protection circuit, surge energy absorbing circuit, isolation protective circuit and the EMI protective circuit that are connected in series successively;
Described lightning protection circuit comprises the first inductance and second inductance of series connection, is serially connected with Multiple level discharge tube between the input of described first inductance and circuit ground end; Votage limit type components and parts are serially connected with between the output of described first inductance and circuit ground end; Votage limit type components and parts are serially connected with between the output of described second inductance and circuit ground end.
2. a kind of equipotential lightning protection device as claimed in claim 1, is characterized in that, described surge energy absorbing circuit comprises high-voltage pulse electric capacity element.
3. a kind of equipotential lightning protection device as claimed in claim 1, is characterized in that, described isolation protective circuit adopts isolating transformer.
4. a kind of equipotential lightning protection device as claimed in claim 1, is characterized in that, described EMI circuit comprises the common mode choke and differential mode choke coil that are connected in series successively, is connected with differential mode capacitor between the live wire of described common mode choke input and zero line; Common mode capacitance is serially connected with between the live wire of described differential mode choke coil output and zero line.
5. a kind of equipotential lightning protection device as claimed in claim 1, is characterized in that, described common mode choke comprises the first inductance being serially connected in live wire, is serially connected in the second inductance of zero line; Shown differential mode choke coil comprises the 3rd inductance be connected in series with the first inductance, the 4th inductance be connected in series with the second inductance; Described common mode capacitance comprises the second electric capacity, the 3rd electric capacity and the 4th electric capacity; Between the live wire that described second electric capacity is directly serially connected in common mode choke output and zero line; Described 3rd electric capacity and the 4th capacitance series are between the live wire and zero line of common mode choke output; The junction ground connection of described 3rd electric capacity and the 4th electric capacity.
6. a kind of equipotential lightning protection device as claimed in claim 1, is characterized in that, described surge energy absorbing circuit comprises high-voltage pulse electric capacity element; Described isolation protective circuit adopts isolating transformer; Described EMI circuit comprises the common mode choke and differential mode choke coil that are connected in series successively, is connected with differential mode capacitor between the live wire of described common mode choke input and zero line; Common mode capacitance is serially connected with between the live wire of described differential mode choke coil output and zero line;
Described common mode choke comprises the first inductance being serially connected in live wire, is serially connected in the second inductance of zero line; Shown differential mode choke coil comprises the 3rd inductance be connected in series with the first inductance, the 4th inductance be connected in series with the second inductance; Described common mode capacitance comprises the second electric capacity, the 3rd electric capacity and the 4th electric capacity; Between the live wire that described second electric capacity is directly serially connected in common mode choke output and zero line; Described 3rd electric capacity and the 4th capacitance series are between the live wire and zero line of common mode choke output; The junction ground connection of described 3rd electric capacity and the 4th electric capacity.
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| CN201410448267.7A CN104242284A (en) | 2014-09-04 | 2014-09-04 | Equipotential lightning protection device |
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| CN201410448267.7A CN104242284A (en) | 2014-09-04 | 2014-09-04 | Equipotential lightning protection device |
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Cited By (6)
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| CN105562923A (en) * | 2016-03-04 | 2016-05-11 | 珠海灵科自动化科技有限公司 | Lightning protection device for ultrasonic welding machine |
| CN109450236A (en) * | 2018-12-19 | 2019-03-08 | 中国电子科技集团公司第四十三研究所 | A kind of EMI damping filter circuit and filtering method |
| CN109975602A (en) * | 2019-04-24 | 2019-07-05 | 何平 | A kind of wireless remote counter for pre-arcing formula lightning rod |
| CN113937714A (en) * | 2021-10-08 | 2022-01-14 | 南京金陵特种设备安全附件检验中心 | Lightning protection device and detection method thereof |
| CN114207974A (en) * | 2019-06-14 | 2022-03-18 | 丁特科工厂加斯蒂兹有限公司 | Variable radio frequency electromagnetic compensation device for protecting wind tower blades or other moving or stationary structures |
| CN114243662A (en) * | 2021-11-01 | 2022-03-25 | 南方电网数字电网研究院有限公司 | VFTO anti-interference circuit and switching device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105562923A (en) * | 2016-03-04 | 2016-05-11 | 珠海灵科自动化科技有限公司 | Lightning protection device for ultrasonic welding machine |
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| CN109975602A (en) * | 2019-04-24 | 2019-07-05 | 何平 | A kind of wireless remote counter for pre-arcing formula lightning rod |
| CN114207974A (en) * | 2019-06-14 | 2022-03-18 | 丁特科工厂加斯蒂兹有限公司 | Variable radio frequency electromagnetic compensation device for protecting wind tower blades or other moving or stationary structures |
| CN114207974B (en) * | 2019-06-14 | 2024-03-19 | 丁特科工厂加斯蒂兹有限公司 | Variable radio frequency electromagnetic compensation device for protecting wind tower blade |
| CN113937714A (en) * | 2021-10-08 | 2022-01-14 | 南京金陵特种设备安全附件检验中心 | Lightning protection device and detection method thereof |
| CN114243662A (en) * | 2021-11-01 | 2022-03-25 | 南方电网数字电网研究院有限公司 | VFTO anti-interference circuit and switching device |
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Effective date of registration: 20160303 Address after: 3, building 26, 518000 building, first industrial village, Fuyong street, Guangdong, Shenzhen, Baoan District, A7 Applicant after: Shenzhen Jiaming Lightning Protection Technology Co., Ltd. Address before: 411100, No. 03, No. 1818, Xing Xing Village, Nanyang village, Yuhu District, Hunan, Xiangtan Province, Nanyuan Applicant before: Liao Feizhou |
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Effective date of registration: 20160722 Address after: 411100, No. 03, No. 1818, Xing Xing Village, Nanyang village, Yuhu District, Hunan, Xiangtan Province, Nanyuan Applicant after: Liao Feizhou Address before: 3, building 26, 518000 building, first industrial village, Fuyong street, Guangdong, Shenzhen, Baoan District, A7 Applicant before: Shenzhen Jiaming Lightning Protection Technology Co., Ltd. |
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Application publication date: 20141224 |
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