CN202068180U - Circuit structure for two-wire system channel lightning protection apparatus - Google Patents
Circuit structure for two-wire system channel lightning protection apparatus Download PDFInfo
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- CN202068180U CN202068180U CN201120053145XU CN201120053145U CN202068180U CN 202068180 U CN202068180 U CN 202068180U CN 201120053145X U CN201120053145X U CN 201120053145XU CN 201120053145 U CN201120053145 U CN 201120053145U CN 202068180 U CN202068180 U CN 202068180U
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- circuit structure
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Abstract
The utility model relates to a circuit structure for a two-wire system channel lightning protection apparatus. The circuit structure comprises two signal wires connected with a communication system, a ground wire, and four gas discharge tubes, wherein the two signal wires, respectively connected with two non-inductive resistors in serial, allow the coupling of two gas discharge tubes having different discharge current grades, that is, the coupling of the gas discharge tube and a transient voltage inhibition diode. Compared with the prior art, the circuit structure of the utility model can effectively prevent the low-voltage equipment from being damaged by over-voltage interference and induction stroke; can be applied to two-wire system high frequency communication or the lightning protection of general low frequency communication system; is capable of restricting the wave between wire and the ground as well as between the wires to flushing over the voltage; adopts multi-level protection circuit, with low residual voltage level and high protection performance; and has wider transmission bands, lower insertion loss, and weaker influence upon the communication equipment system.
Description
Technical field
The utility model relates to lightning protection device, particularly relates to a kind of two-wire system channel lightning protection device circuit structure.
Background technology
Thunder and lightning is the powerful pulse sparkover process of nature, the direct lightning strike electric current can reach 200KA, after direct lightning strike produces, in the earth, the equipment that is connected with these metallic conductors all might damage huge lightning current by the timely bleed off of various metallic conductors, the metallic conductor and the various electric equipment that directly do not link to each other with these metals, can be by various coupling mechanisms, also induction produces considerable lightning current pulse, is enough to damage equipment, so the lightning protection problem should be enough to draw attention.
Since GBJ57-83 " Code for design of lightning protection of buildings " and the promulgation GB50057-94 of the Ministry of Construction on November 1st, 1994 " Code for design of lightning protection of buildings " that State Planning Commission's approval on June 1st, 1984 is tried, on the lightning Protection Design of buildings in general, all carry out according to national regulation.This part mainly is the harm that prevents direct lightning strike.In recent years along with the high speed development of microelectric technique, be that the computer information network system of core has been widely used among the every field of the every profession and trade and the modern life with the large scale integrated circuit components and parts.A large amount of microelectronics communication network devices are placed in the kind building, cause the possibility of indoor information system microelectronic device damage to reduce greatly because of thunder and lightning directly hits.But the annual various thunderbolt incidents one that taken place are proving: the designed installation direct striking thunder prevention of routine building thing device can not prevent effectively because of responding to the overcurrent that thunder causes, electromagnetic pulse, static etc.Lightning wave is invaded computer information network system equipment is worked the mischief.The more and more faster integrated level of the development speed of modern electronic technology is more and more higher, and information stores is increasing, and speed and precision also improve constantly, operating voltage tightly has several volts, the information electric current only has microampere order, therefore disturbs sensitivity especially to external world, and particularly the pulse tolerance to lightning current is very low.Therefore most important to the lightning protection of information equipment.The overcurrent sensitivity that the induction thunder is caused is low at present, and passband is smaller, gives the bigger interference of system's precocity.
Summary of the invention
Technical problem to be solved in the utility model is exactly to provide a kind of two-wire system channel lightning protection device circuit structure for the defective that overcomes above-mentioned prior art existence.
The purpose of this utility model can be achieved through the following technical solutions: a kind of two-wire system channel lightning protection device circuit structure, it is characterized in that, comprise two paths of signals line, ground wire and four gas discharge tubes of being used to be connected into communication system, be in series with two noninductive resistances on the described two paths of signals line respectively, the lightning protection component of different leakage current grades well is coupled.
The utility model also comprises three TVS pipe, and these three TVS pipes are connected between every road holding wire and the ground wire, between holding wire and the holding wire.
The utility model also comprises bridge circuit and TVS pipe that is made of four high frequency fast recovery diodes, and this bridge circuit is connected between the two paths of signals line, and described TVS pipe is connected with the brachium pontis of bridge circuit.
Compared with prior art, the utlity model has following advantage:
1, prevents that effectively low-voltage equipment is subjected to the destruction that thunder was disturbed and responded in overvoltage;
2, the lightning protection that is used for communication of two-wire system high frequency or the general communication system of low frequency, the overvoltage surge between energy ground, strict restraining line and the line line.
3, adopt the multi-stage protection circuit, the residual voltage level is low, and protective value is good;
4, passband broad, the insertion loss is low.Little to the communication apparatus systematic influence.
Description of drawings
Fig. 1 is the structural representation of embodiment 1 of the present utility model.
Fig. 2 is the structural representation of embodiment 2 of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
The utility model circuit adopts three shunt circuits overcurrent of releasing, and uses multi-stage protection in the loop, adopts gas discharge tube, piezo-resistance and inhibition diode (TVS pipe), and utilizes the characteristics of various surge suppressors, the realization reliably protecting.During operate as normal; each protection component is inoperative; protected equipment operate as normal; when be struck by lightning in the loop, when lightning surge arrives, suppress at first conducting of diode; transient overvoltage accurately is controlled at very low level; if surge current is bigger,, big current drain is arrived the earth until promoting the prime discharge.If discharging current is worth less than this, then prime is failure to actuate.The advantage that adopts this circuit not only can utilize discharger to be swift in motion under the condition of low protection level can also reach very high discharging current simultaneously.In the high-frequency information circuit, because TVS inter-stage capacitance is bigger, generally be in the 5000-10000PF scope, receive on the circuit and can influence transmit passband, signal is distorted, manage to be connected into 4 high frequency fast recovery diodes of bridge-type serial connection for this reason, can make like this product passband can reach under the 130MHz the insertion loss≤the 3dB value as shown in Figure 2.
Embodiment 1
As shown in Figure 1; present embodiment is used for the lightning protection of the general communication system of low frequency; comprise holding wire A1, holding wire A2, ground wire B, four gas discharge tube C and three TVS pipe D of being used to be connected into communication system; be in series with two piezo-resistance R on the described two paths of signals line respectively; be connected a gas discharge tube C between each piezo-resistance R and the ground wire, described three TVS pipe D is connected between holding wire A1 and the ground wire B, between holding wire A2 and the ground wire B, between holding wire A1 and the holding wire A2.
Embodiment 2
As shown in Figure 2; present embodiment is used for the lightning protection of high frequency communication system; bridge circuit and a TVS pipe D of comprising the holding wire A1, the holding wire A2 that are used to be connected into communication system, ground wire B, four gas discharge tube C, constituting by four high frequency fast recovery diode E; be in series with two piezo-resistance R on the described two paths of signals line respectively; be connected a gas discharge tube C between each piezo-resistance R and the ground wire B; described bridge circuit is connected between holding wire A1, the holding wire A2, and described TVS pipe D is connected with the brachium pontis of bridge circuit.
Claims (3)
1. two-wire system channel lightning protection device circuit structure, it is characterized in that, comprise two paths of signals line, ground wire and four gas discharge tubes of being used to be connected into communication system, on the described two paths of signals line respectively by noninductive resistance the release lightning protection component of grade of different-energy that is coupled.
2. a kind of two-wire system channel lightning protection device circuit structure according to claim 1 is characterized in that, also comprises three TVS pipe, and these three TVS pipes are connected between every road holding wire and the ground wire, between holding wire and the holding wire.
3. a kind of two-wire system channel lightning protection device circuit structure according to claim 1, used rapid-action TVS in the circuit, the TVS deboost is low, breakdown potential is forced down, but interelectrode capacitance is quite high, in order to reduce electric capacity, manage inter-stage electric capacity to reduce TVS by the bridge circuit that four high frequency fast recovery diodes constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120053145XU CN202068180U (en) | 2011-02-25 | 2011-02-25 | Circuit structure for two-wire system channel lightning protection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120053145XU CN202068180U (en) | 2011-02-25 | 2011-02-25 | Circuit structure for two-wire system channel lightning protection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202068180U true CN202068180U (en) | 2011-12-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120053145XU Expired - Fee Related CN202068180U (en) | 2011-02-25 | 2011-02-25 | Circuit structure for two-wire system channel lightning protection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202068180U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066584A (en) * | 2012-12-28 | 2013-04-24 | 李怀东 | Low-capacitance large-surge protective circuit |
| CN105896502A (en) * | 2014-11-05 | 2016-08-24 | 天津市吉涛电子科技有限公司 | Surge protector used for twisted pair |
| CN114002548A (en) * | 2021-10-29 | 2022-02-01 | 沈阳铁路信号有限责任公司 | Lightning protection monitoring method and system with evaluation function |
-
2011
- 2011-02-25 CN CN201120053145XU patent/CN202068180U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066584A (en) * | 2012-12-28 | 2013-04-24 | 李怀东 | Low-capacitance large-surge protective circuit |
| CN105896502A (en) * | 2014-11-05 | 2016-08-24 | 天津市吉涛电子科技有限公司 | Surge protector used for twisted pair |
| CN114002548A (en) * | 2021-10-29 | 2022-02-01 | 沈阳铁路信号有限责任公司 | Lightning protection monitoring method and system with evaluation function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20120225 |