CN208904645U - A kind of lightning protection circuit for Ethernet - Google Patents
A kind of lightning protection circuit for Ethernet Download PDFInfo
- Publication number
- CN208904645U CN208904645U CN201821434597.0U CN201821434597U CN208904645U CN 208904645 U CN208904645 U CN 208904645U CN 201821434597 U CN201821434597 U CN 201821434597U CN 208904645 U CN208904645 U CN 208904645U
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- China
- Prior art keywords
- terminals
- cable
- lightning protection
- self
- recovery fuse
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Abstract
The utility model discloses a kind of lightning protection circuit for Ethernet, including at least one lightning protection unit, lightning protection unit includes cable set, gas-discharge tube, first self-recovery fuse, second self-recovery fuse and Electro-static Driven Comb protective unit, cable set includes the first cable and the second cable for being used for transmission electric signal, cable set is successively arranged gas-discharge tube in the transmission direction along electric signal, self-recovery fuse and Electro-static Driven Comb protective unit, gas-discharge tube is connected between the first cable and the second cable, the first self-recovery fuse is connected in series on first cable, the second self-recovery fuse is connected in series on second cable, Electro-static Driven Comb protective unit respectively with the first cable, second cable is electrically connected, and Electro-static Driven Comb protective unit is further connect with ground wire.The response time of lightning protection circuit described in the utility model for Ethernet is fast, component is few, wiring is simple, through-current capacity is big, stable signal transmission.
Description
Technical field
The utility model relates to field of electrical control more particularly to a kind of lightning protection circuits for Ethernet.
Background technique
For lightning protection circuit currently used for Ethernet for protecting to the network port, existing lightning protection circuit is divided into common mode
Protection and differential mode protect two aspects.The ethernet signal cable of RJ45 connector is balancing twisted-pair line, the lightning surge of induction
Based on common mode, the differential mode overvoltage/overcurrent between cable is relatively smaller.But in the case of non-ideal network transformer, altogether
The overvoltage/overcurrent of mould can also be converted to differential mode.The lightning protection circuit of existing Ethernet interface is to lightning current to release
Access releases high pressure before transformer, and reduce influences transformer as far as possible, and will be electric using Transient Suppression Diode
Pressing tongs position is to a lower voltage value, to realize the protection to late-class circuit.In this way, what is used is all discrete
Component, quantity is more, causes PCB surface product to increase, cabling requirement improves, while the consistent gender gap of each device will affect communication matter
Amount, causes to test bad.Therefore, it is necessary to propose the new lightning protection circuit for Ethernet of one kind to solve the above problems.
Utility model content
The purpose of this utility model is to provide a kind of response time is fast, component is few, wiring is simple, through-current capacity is big, letter
Number stable lightning protection circuit for Ethernet of transmission.
To achieve the goals above, technical solution used by the utility model is as follows:
A kind of lightning protection circuit for Ethernet, including at least one lightning protection unit, the lightning protection unit include cable set,
Gas-discharge tube, the first self-recovery fuse, the second self-recovery fuse and Electro-static Driven Comb protective unit, the cable set include
Be used for transmission the first cable and the second cable of electric signal, the cable set on the transmission direction along the electric signal successively
Equipped with the gas-discharge tube, the first self-recovery fuse and the second self-recovery fuse, the Electro-static Driven Comb protective unit, institute
It states gas-discharge tube to be connected between first cable and second cable, be connected in series on first cable described
First self-recovery fuse, second self-recovery fuse is connected in series on second cable, and the Electro-static Driven Comb is anti-
Protect unit respectively with first cable, second cable be electrically connected, and the Electro-static Driven Comb protective unit further with
Ground wire connection.
Preferably, the gas-discharge tube has the first terminals, the second terminals and third terminals, and described first certainly
Restoring fuse has the 4th terminals and the 5th terminals, and second self-recovery fuse has the 6th terminals and the 7th
Terminals, the Electro-static Driven Comb protective unit include the 8th terminals, the 9th terminals and the tenth terminals, first wiring
End is electrically connected with the 4th terminals, and second terminals and the 6th terminals are electrically connected, and the third connects
Line end is connect with ground wire, and the 5th terminals and the 8th terminals are electrically connected, the 7th terminals and described the
Nine terminals are electrically connected, and the tenth terminals are connect with ground wire.
Preferably, the Electro-static Driven Comb protective unit includes that the first electrostatic diode, the second electrostatic diode and third are quiet
Electric diode, the first end of the first electrostatic diode form the 8th terminals, and the of the first electrostatic diode
The first end of two ends and the second electrostatic diode is electrically connected, and the second end of the first electrostatic diode forms described the
Nine terminals connect described between the second end of the second electrostatic diode and the first end of the first electrostatic diode
Three electrostatic diodes, the second end of the second electrostatic diode form the tenth terminals.
Preferably, the gas-discharge tube includes ceramic gas discharge tube.
Preferably, the lightning protection circuit sets two relatively independent settings of lightning protection unit there are two the lightning protection unit.
Compared with prior art, the response time of the lightning protection circuit described in the utility model for Ethernet is fast, component
Less, wiring is simple, through-current capacity is big, stable signal transmission.
Detailed description of the invention
Fig. 1 is the circuit diagram of lightning protection circuit one embodiment described in the utility model for Ethernet.
It is respectively marked in figure as follows: L1, the first cable；L2, the second cable；GDT, gas-discharge tube；PTC1, first are from extensive
Double insurance silk；PTC2, the second self-recovery fuse；D1, the first electrostatic diode；D2, the second electrostatic diode；D3, third are quiet
Electric diode；A1, the first terminals；A2, the second terminals；A3, third terminals；A4, the 4th terminals；A5, the 5th wiring
End；A6, the 6th terminals；A7, the 7th terminals；A8, the 8th terminals；A9, the 9th terminals；A10, the tenth terminals.
Specific embodiment
The utility model is further described below combined with specific embodiments below.
As shown in Figure 1, the utility model provides a kind of lightning protection circuit for Ethernet, including at least one lightning protection list
Member, lightning protection unit include cable set, gas-discharge tube GDT, the first self-recovery fuse PTC1, the second self-recovery fuse PTC2
With Electro-static Driven Comb protective unit, cable set includes that the first cable L1 for being used for transmission electric signal and the second cable L2, cable set exist
Gas-discharge tube GDT, the first self-recovery fuse PTC1 and the second self- recoverage are successively arranged in the transmission direction of electric signal
Fuse PTC2, Electro-static Driven Comb protective unit, gas-discharge tube GDT are connected between the first cable L1 and the second cable L2, the
It is connected in series on one cable L1 on the first self-recovery fuse PTC1, the second cable L2 and is connected in series with the insurance of the second self- recoverage
Silk PTC2, Electro-static Driven Comb protective unit is electrically connected with the first cable L1, the second cable L2 respectively, and Electro-static Driven Comb protective unit
Further it is connect with ground wire.
In the present invention, gas-discharge tube GDT has the first terminals a1, the second terminals a2 and third terminals
A3, the first self-recovery fuse PTC1 have the 4th terminals a4 and the 5th terminals a5, the second self-recovery fuse
PTC2 has the 6th terminals a6 and the 7th terminals a7, and Electro-static Driven Comb protective unit includes the 8th terminals a8, the 9th wiring
A9 and the tenth terminals a10, the first terminals a1 and the 4th terminals a4 is held to be electrically connected, the second terminals a2 and the 6th wiring
A6 is held to be electrically connected, third terminals a3 is connect with ground wire, and the 5th terminals a5 and the 8th terminals a8 are electrically connected, and the 7th connects
Line end a7 and the 9th terminals a9 is electrically connected, and the tenth terminals a10 is connect with ground wire.
In addition, Electro-static Driven Comb protective unit includes the first electrostatic diode D1, the second electrostatic diode D2 and third electrostatic
The first end of diode D3, the first electrostatic diode D1 forms the 8th terminals a8, the second end of the first electrostatic diode D1 with
The first end of second electrostatic diode D2 is electrically connected, and the second end of the first electrostatic diode D1 forms the 9th terminals a9, the
Connection third electrostatic diode D3 between the second end of two electrostatic diode D2 and the first end of the first electrostatic diode D1, second
The second end of electrostatic diode D2 forms the tenth terminals a10.
The working principle of the utility model are as follows: when the electric signal for flowing through the first cable L1 and the second cable L2 is normal,
Gas-discharge tube GDT is in state of insulation, and the first self-recovery fuse PTC1 and the second self-recovery fuse PTC2 are conduction
State, electric signal can be transmitted to other circuits by the first cable L1 and the second cable L2, and electrostatic caused by electric signal can
Ground wire is reached by Electro-static Driven Comb protective unit to be sunk to a ground；When the electric signal for flowing through the first cable L1 and the second cable L2
When electric current is excessive, gas-discharge tube GDT is in conduction state, the first self-recovery fuse PTC1 and the second self-recovery fuse
PTC2 is state of insulation, and electric signal reaches ground wire by gas-discharge tube GDT and is sunk to a ground, and electric signal cannot pass through first
Cable L1 and the second cable L2 are transmitted to other circuits.
In when it is implemented, ceramic gas discharge tube can be used in the gas-discharge tube GDT, other materials can also be used
Gas-discharge tube.In addition, lightning protection circuit sets two relatively independent settings of lightning protection unit there are two lightning protection unit, thus enhancing with
The stability netted very much.
In conclusion the response time of the lightning protection circuit described in the utility model for Ethernet is fast, component is few, wiring
Simply, through-current capacity is big, stable signal transmission.
Schematically the utility model and embodiments thereof are described above, description is not limiting, attached drawing
Shown in be also one of the embodiments of the present invention, actual structure is not limited to this.So if this field
Those of ordinary skill enlightened by it, without deviating from the purpose of the present invention, not inventively design
Frame mode similar with the technical solution and embodiment, all should belong to the protection range of the utility model.
Claims (5)
1. a kind of lightning protection circuit for Ethernet, which is characterized in that including at least one lightning protection unit, the lightning protection unit packet
Cable set, gas-discharge tube, the first self-recovery fuse, the second self-recovery fuse and Electro-static Driven Comb protective unit are included, it is described
Cable set includes the first cable and the second cable for being used for transmission electric signal, and the cable set is in the transmission along the electric signal
The gas-discharge tube, first self-recovery fuse and second self-recovery fuse, described is successively arranged on direction
Electro-static Driven Comb protective unit, the gas-discharge tube are connected between first cable and second cable, and described first
It is connected in series with first self-recovery fuse on cable, second self- recoverage is connected in series on second cable and is protected
Dangerous silk, the Electro-static Driven Comb protective unit is electrically connected with first cable, second cable respectively, and the electrostatic is released
Protective unit is put further to connect with ground wire.
2. being used for the lightning protection circuit of Ethernet as described in claim 1, which is characterized in that the gas-discharge tube has first
Terminals, the second terminals and third terminals, first self-recovery fuse have the 4th terminals and the 5th terminals,
Second self-recovery fuse has the 6th terminals and the 7th terminals, and the Electro-static Driven Comb protective unit connects including the 8th
Line end, the 9th terminals and the tenth terminals, first terminals and the 4th terminals are electrically connected, and described second connects
Line end and the 6th terminals are electrically connected, and the third terminals are connect with ground wire, the 5th terminals and described the
Eight terminals are electrically connected, and the 7th terminals and the 9th terminals are electrically connected, the tenth terminals and ground wire
Connection.
3. being used for the lightning protection circuit of Ethernet as claimed in claim 2, which is characterized in that the Electro-static Driven Comb protective unit packet
Include the first electrostatic diode, the second electrostatic diode and third electrostatic diode, the first end shape of the first electrostatic diode
At the 8th terminals, the second end of the first electrostatic diode and the first end of the second electrostatic diode electrically connect
Connect, the second end of the first electrostatic diode forms the 9th terminals, the second end of the second electrostatic diode with
Connect the third electrostatic diode between the first end of the first electrostatic diode, the second of the second electrostatic diode
End forms the tenth terminals.
4. being used for the lightning protection circuit of Ethernet as described in claim 1, which is characterized in that the gas-discharge tube includes ceramics
Gas-discharge tube.
5. being used for the lightning protection circuit of Ethernet as described in claim 1, which is characterized in that the lightning protection circuit is set there are two institute
State lightning protection unit, two relatively independent settings of lightning protection unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821434597.0U CN208904645U (en) | 2018-09-03 | 2018-09-03 | A kind of lightning protection circuit for Ethernet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821434597.0U CN208904645U (en) | 2018-09-03 | 2018-09-03 | A kind of lightning protection circuit for Ethernet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208904645U true CN208904645U (en) | 2019-05-24 |
Family
ID=66571242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821434597.0U Expired - Fee Related CN208904645U (en) | 2018-09-03 | 2018-09-03 | A kind of lightning protection circuit for Ethernet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208904645U (en) |
-
2018
- 2018-09-03 CN CN201821434597.0U patent/CN208904645U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190524 Termination date: 20210903 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |