CN201466714U - Lightning arrester for communication apparatus - Google Patents
Lightning arrester for communication apparatus Download PDFInfo
- Publication number
- CN201466714U CN201466714U CN2009201089021U CN200920108902U CN201466714U CN 201466714 U CN201466714 U CN 201466714U CN 2009201089021 U CN2009201089021 U CN 2009201089021U CN 200920108902 U CN200920108902 U CN 200920108902U CN 201466714 U CN201466714 U CN 201466714U
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- CN
- China
- Prior art keywords
- lightning protection
- protection device
- circuit
- zero line
- live wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a lightning arrester for a communication apparatus, which is connected to an interface of the communication apparatus. The lightning arrester comprises a circuit board and a metallic shell installed on the circuit board in a sealing way, wherein the circuit board comprises three surge protective circuits, one of the surge protective circuits is connected between the live wire and the earth wire in a bridging way, one surge protective circuit is connected between the zero line and the earth wire in a bridging way, and the other surge protective circuit is connected between the live wire and the zero line in a bridging way; the live wire and the zero line are respectively connected with two resistors in series; a gas discharge tube with three ends is connected between the live wire and the zero line in a bridging way; and the third end of the gas discharge tube is connected with the earth wire. The communication apparatus using the lightning arrester of the utility model has the functions of preventing surge and shielding electromagnetic leakage and has the advantages of short response time and low attenuation.
Description
Technical field
The utility model relates to the thunder resisting equipment field, and specifically, the utility model relates to a kind of lightning protection device that is used for communication equipment.
Background technology
Communication device works voltage is low and usually be positioned over the field, very easily is subjected to the infringement of direct lightning strike, induction thunder and surge.Communication interface is as the relaying connected mode of terminal equipment and transmission equipment; not only require access lightning protection device wherein to possess wave resistance and come through the voltage overcurrent; also require to have the function of electromagnetic shielding; as some important Party and government offices; the communication equipment that military organs etc. are used; though the lightning protection device that interface inserted of communication equipment possesses the effect of anti-surge in the prior art; but can not accomplish electromagnetic shielding and guarantee high quality communication; so lightning protection device can not really play a protective role to communication equipment; can also play electromagnetic shielding when how to make lightning protection device possess anti-surge; guarantee the high quality communication of communication equipment, become technical problem for needing to be resolved hurrily.
The utility model content
Technical problem to be solved in the utility model provides a kind of lightning protection device that is used for communication equipment, after communication equipment adopts this lightning protection device, not only possesses the effect of anti-surge, also possess simultaneously the response time short, decay is low, and can shield the effect of electromagnetic exposure.
For solving the problems of the technologies described above; the utility model provides a kind of lightning protection device that is used for communication equipment; described lightning protection device is connected on the interface of described communication equipment; wherein; described lightning protection device is made up of the metal shell that circuit board and sealing are installed on the described circuit board; described circuit board comprises three groups of surge protection circuits; wherein; one group of described surge protection circuit is connected across between live wire and the ground wire; another is organized described surge protection circuit and is connected across between zero line and the ground wire; also have one group of described surge protection circuit to be connected across between live wire and the zero line; be connected in series two resistance on described live wire and the zero line respectively; cross-over connection one has the gas discharge tube of three ends between described live wire and zero line, and the 3rd end of described gas discharge tube is connected with described ground wire.
Lightning protection device described in the utility model, wherein, described surge protection circuit further is the circuit that Transient Suppression Diode and fast recovery diode series connection back is formed.
Further, wherein, the circuit that described Transient Suppression Diode and fast recovery diode are composed in series further is the circuit that is composed in series with described Transient Suppression Diode after two fast recovery diode parallel connections.
Further, wherein, described resistance is decoupling resistance.
Further, wherein, described decoupling resistance is 4.7 Ω/0.5W.
Further, wherein, it is characterized in that the interface type of described lightning protection device comprises: RJ45 interface, RJ11 interface and RS-232/422/485 interface.
Compared with prior art, after communication equipment adopts lightning protection device described in the utility model, not only possess the effect of anti-surge, also possess simultaneously the response time short, decay is low, and can shield the effect of electromagnetic exposure.
Description of drawings
Fig. 1 is the circuit theory diagrams of lightning protection device described in the utility model;
Fig. 2 is the another kind of circuit theory diagrams of lightning protection device described in the utility model.
Embodiment
Though main thought of the present utility model is to solve in the communication equipment to have adopted lightning protection device, has possessed the effect of anti-surge, but can't realize that the response time is short, decay is low, and can shield the effect of electromagnetic exposure.Below embodiment is described in detail, but not as to qualification of the present utility model.
As shown in Figure 1, be the circuit theory diagrams of lightning protection device described in the utility model.This lightning protection device is connected on the interface of described communication equipment, and this lightning protection device is made up of the metal shell that circuit board and sealing are installed on the described circuit board, and this circuit board comprises: Transient Suppression Diode TV1, TV2 and TV3, fast recovery diode D
1, D
2And D
3, resistance R
1And R
2And gas discharge tube Q with 3 terminals
1Wherein, fast recovery diode D
1With Transient Suppression Diode TV
1The series connection back is formed first group of surge protection circuit and is connected across between live wire and the ground wire; Fast recovery diode D
2With Transient Suppression Diode TV
2The series connection back is formed second group of surge protection circuit and is connected across between zero line and the ground wire; Fast recovery diode D
3With Transient Suppression Diode TV
3The series connection back is formed the 3rd group of surge protection circuit and is connected across between zero line and the live wire; Gas discharge tube Q
1Two ends be connected across between zero line and the live wire gas discharge tube Q
1The 3rd end be connected with ground wire; Resistance R
1Be connected on the live wire resistance R
2Be connected on the zero line.
Why adopt Transient Suppression Diode on the circuit board in the lightning protection device described in the utility model, be because this Transient Suppression Diode response speed is exceedingly fast, can in the extremely short time, start, the voltage clamping at communication device interface two ends a lower level, and is released surge current to greatly.Simultaneously, big in order to overcome the Transient Suppression Diode junction capacitance, influence the problem of HF communication quality, the access fast recovery diode of connecting on the circuit of Transient Suppression Diode place can significantly reduce communication interface two ends capacitance, guarantees the quality of HF communication.The access parameter of connecting respectively on live wire and zero line is the decoupling resistance of 4.7 Ω/0.5W, when can improve the electrical impedance impact capacity, can also reduce its insertion loss value on the line.Because circuit board is in the metal shell of sealing, shielding electromagnetic wave in the time of can guaranteeing the signal transmission.
Lightning protection device described in the utility model is connected on the interface of described communication equipment, and for can be consistent with the interface type of communication equipment, the interface type of lightning protection device can comprise multiple, as RJ45 interface, RJ11 interface and RS-232/422/485 interface etc.
As shown in Figure 2, be the another kind of circuit theory diagrams of lightning protection device described in the utility model.Wherein, the fast recovery diode D on the circuit board of this lightning protection device
1, D
2Or D
3Can form by the fast recovery diode of two parallel connections.The effect that lightning protection device described in the utility model is taked to connect like this is the capacitance that further reduces between live wire and the zero line, improves communication quality.
Compared with prior art, adopt the communication equipment of lightning protection device described in the utility model minimum to the signal transmission quality influence.Owing to exist (metal shell that sealing promptly is installed) of screen, the external world can't be by electromagnetic wave detection to Content of Communication simultaneously.When the live wire of communication equipment, when the zero line two ends suffer overvoltage surge, the fast recovery diode D in the lightning protection device
1, D
2With Transient Suppression Diode TV
1, TV
2The at first conducting of forming of series circuit, with live wire and the strangulation of zero line both end voltage in lower scope, and with a part of surge current the earth of releasing; Simultaneously, long gas discharge tube Q of response time
1Start subsequently, with most of surge current the earth of releasing; When overvoltage surge, when overcurrent strength is big, through preceding two-stage release and strangulation after weakened fast recovery diode D greatly
3With Transient Suppression Diode TV
3The circuit of forming provides last one deck protection, and residual voltage is limited in very low level.Therefore, after communication equipment adopts lightning protection device described in the utility model, not only possess the effect of anti-surge, also possess simultaneously the response time short, decay is low, and can shield the effect of electromagnetic exposure.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the utility model.
Claims (6)
1. lightning protection device that is used for communication equipment; described lightning protection device is connected on the interface of described communication equipment; it is characterized in that; described lightning protection device is made up of the metal shell that circuit board and sealing are installed on the described circuit board; described circuit board comprises three groups of surge protection circuits; wherein; one group of described surge protection circuit is connected across between live wire and the ground wire; another is organized described surge protection circuit and is connected across between zero line and the ground wire; also have one group of described surge protection circuit to be connected across between live wire and the zero line; be connected in series two resistance on described live wire and the zero line respectively; cross-over connection one has the gas discharge tube of three ends between described live wire and zero line, and the 3rd end of described gas discharge tube is connected with described ground wire.
2. lightning protection device as claimed in claim 1 is characterized in that, described surge protection circuit further is the circuit that Transient Suppression Diode and fast recovery diode series connection back is formed.
3. lightning protection device as claimed in claim 2 is characterized in that,
The circuit that described Transient Suppression Diode and fast recovery diode are composed in series further is the circuit that is composed in series with described Transient Suppression Diode after two fast recovery diode parallel connections.
4. as claim 1,2 or 3 described lightning protection devices, it is characterized in that described resistance is decoupling resistance.
5. lightning protection device as claimed in claim 3 is characterized in that, described decoupling resistance is 4.7 Ω/0.5W.
6. lightning protection device as claimed in claim 1 is characterized in that,
The interface type of described lightning protection device comprises: RJ45 interface, RJ11 interface and RS-232/422/485 interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201089021U CN201466714U (en) | 2009-06-10 | 2009-06-10 | Lightning arrester for communication apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201089021U CN201466714U (en) | 2009-06-10 | 2009-06-10 | Lightning arrester for communication apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201466714U true CN201466714U (en) | 2010-05-12 |
Family
ID=42394061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201089021U Expired - Lifetime CN201466714U (en) | 2009-06-10 | 2009-06-10 | Lightning arrester for communication apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201466714U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593816A (en) * | 2012-03-06 | 2012-07-18 | 深圳市海鹏信电子股份有限公司 | Surge protection device of gigabit active Ethernet |
| WO2013189314A1 (en) * | 2012-06-28 | 2013-12-27 | 中兴通讯股份有限公司 | Protection circuit of communication interface |
| CN105186484A (en) * | 2015-07-30 | 2015-12-23 | 西安爱邦电磁技术有限责任公司 | Airborne equipment lightning suppressor with 422 communication function |
| CN106655135A (en) * | 2016-11-17 | 2017-05-10 | 广西大学 | CAN bus lightning protection device capable of automatically detecting lightning stroke number |
| CN112600181A (en) * | 2020-12-11 | 2021-04-02 | 北京京航计算通讯研究所 | Strong electromagnetic pulse protection system with device degradation self-monitoring function |
-
2009
- 2009-06-10 CN CN2009201089021U patent/CN201466714U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593816A (en) * | 2012-03-06 | 2012-07-18 | 深圳市海鹏信电子股份有限公司 | Surge protection device of gigabit active Ethernet |
| WO2013189314A1 (en) * | 2012-06-28 | 2013-12-27 | 中兴通讯股份有限公司 | Protection circuit of communication interface |
| US9496705B2 (en) | 2012-06-28 | 2016-11-15 | Zte Corporation | Protection circuit of communication interface |
| CN105186484A (en) * | 2015-07-30 | 2015-12-23 | 西安爱邦电磁技术有限责任公司 | Airborne equipment lightning suppressor with 422 communication function |
| CN105186484B (en) * | 2015-07-30 | 2018-09-25 | 西安爱邦电磁技术有限责任公司 | A kind of airborne equipment thunder and righting blanker with 422 communication functions |
| CN106655135A (en) * | 2016-11-17 | 2017-05-10 | 广西大学 | CAN bus lightning protection device capable of automatically detecting lightning stroke number |
| CN112600181A (en) * | 2020-12-11 | 2021-04-02 | 北京京航计算通讯研究所 | Strong electromagnetic pulse protection system with device degradation self-monitoring function |
| CN112600181B (en) * | 2020-12-11 | 2023-05-30 | 北京京航计算通讯研究所 | Strong electromagnetic pulse protection system with device degradation self-monitoring function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100512 |
|
| CX01 | Expiry of patent term |