CN212137274U - Network signal lightning protection circuit with grounding isolation suppression - Google Patents
Network signal lightning protection circuit with grounding isolation suppression Download PDFInfo
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- CN212137274U CN212137274U CN202020712878.9U CN202020712878U CN212137274U CN 212137274 U CN212137274 U CN 212137274U CN 202020712878 U CN202020712878 U CN 202020712878U CN 212137274 U CN212137274 U CN 212137274U
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Abstract
The utility model discloses a take network signal lightning protection circuit of ground connection isolation suppression, include: suppression circuit is kept apart to tertiary cascaded lightning protection circuit and ground connection, tertiary cascaded lightning protection circuit respectively with suppression circuit, RJ45 input interface, RJ45 output interface electric connection are kept apart to ground connection, tertiary cascaded lightning protection circuit is used for lightning protection, tertiary cascaded lightning protection circuit includes: the lightning protection circuit comprises a main lightning protection circuit as a front stage, a decoupling lightning protection circuit as an intermediate stage and a precise lightning protection circuit as a rear stage. The utility model discloses a three-level cascaded lightning protection circuit can decompose the thunder energy of releasing one-level, attenuate the invasion of thunderbolt current-voltage to rear end protected equipment, provide a low and fast voltage protection level for equipment, have the corresponding fast characteristics of time protection of the thunderbolt, the protective effect is good; and this scheme takes the ground to keep apart the suppression, can prevent that high earth potential from attacking the invasion, reduces the requirement to ground resistance.
Description
Technical Field
The utility model relates to a lightning protection technical field especially relates to a take network signal lightning protection circuit of ground connection isolation suppression.
Background
In the current lightning protection industry, although network signal lightning protectors are installed at the front ends of sensitive equipment such as indoor and outdoor servers, switches and network cards, equipment is still damaged by lightning strikes, and analysis on lightning strike damage sites shows that when lightning current invades the ground, due to the fact that grounding resistance at a grounding point is increased or grounding performance is poor, large lightning strike surge voltage can be generated at the grounding point, and therefore ground potential at the grounding point is raised. When the lightning protection grounding wire of the network equipment is connected to the grounding point, lightning surge voltage can be reversely led into the equipment through the lightning protection grounding wire to cause damage; or because the lightning protection device is connected between two pieces of ground network equipment, because the lightning protection device does not leave enough safety distance, one of the pieces of ground network equipment connected with the network equipment is connected with lightning current to generate high ground potential, and then counterattack is generated on the ground network equipment which is not struck by lightning through a transmission ground wire, so that although the traditional network signal lightning protection device is installed at the front end of the equipment, the lightning protection device only has the function of dredging the invaded current and guiding the invaded current into the ground, but does not block the potential lightning current to counterattack the invasion, and a great back and hidden trouble are left for lightning.
Accordingly, the prior art is deficient and needs improvement.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's is not enough, keeps apart suppression and network signal lightning protection technique with the ground connection and fuses together, solves back door and hidden danger that traditional network signal lightning protection device left over, provides a take ground connection to keep apart the network signal lightning protection circuit who suppresses.
The technical scheme of the utility model as follows: the utility model provides a take network signal lightning protection circuit of ground connection isolation suppression, include: suppression circuit is kept apart to tertiary cascaded lightning protection circuit and ground connection, tertiary cascaded lightning protection circuit respectively with suppression circuit, RJ45 input interface, RJ45 output interface electric connection are kept apart to ground connection, tertiary cascaded lightning protection circuit is used for lightning protection, tertiary cascaded lightning protection circuit includes: the lightning protection circuit comprises a front-stage main lightning protection circuit, a middle-stage decoupling lightning protection circuit and a rear-stage precise lightning protection circuit, wherein the main lightning protection circuit is used for discharging lightning current and electromagnetic pulse, the decoupling lightning protection circuit is used for suppressing lightning current and ensuring that the main lightning protection circuit works timely to discharge the lightning current before the precise lightning protection circuit is not broken down by lightning, the precise lightning protection circuit is used for effectively discharging lightning current voltage in a quick response mode, and the grounding isolation suppression circuit is used for preventing high-ground potential from counterstriking to enter equipment.
Furthermore, the main lightning protection circuit includes a first discharge tube and a second discharge tube, the decoupling lightning protection circuit includes a first resistor to a fourth resistor, the precise lightning protection circuit includes a TVS array, a first pole of the first discharge tube is electrically connected to a first data transmission pin of the RJ45 input interface and one end of the first resistor, a second pole of the first discharge tube is electrically connected to a second data transmission pin of the RJ45 input interface and one end of the second resistor, a first pole of the second discharge tube is electrically connected to a third data transmission pin of the RJ45 input interface and one end of the third resistor, a second pole of the second discharge tube is electrically connected to a fourth data transmission pin of the RJ45 input interface and one end of the fourth resistor, and a ground electrode of the first discharge tube and a ground electrode of the second discharge tube are both electrically connected to one end of the ground isolation and suppression circuit, the suppression circuit other end ground connection is kept apart to ground connection, the first resistance other end respectively with the first data transmission pin of RJ45 output interface the second end and the seventh end electric connection of TVS array, the second resistance other end respectively with the second data transmission pin of RJ45 output interface the first end and the eighth end electric connection of TVS array, the other end of third resistance respectively with the third data transmission pin of RJ45 output interface the third end and the sixth end electric connection of TVS array, the other end of fourth resistance respectively with the fourth data transmission pin of RJ45 output interface the fourth end and the fifth end electric connection of TVS array.
Further, the first discharge tube and the second discharge tube are both H3R5-230 SMD.
Furthermore, the ground isolation suppression circuit is an inductor, the grounding electrode of the first discharge tube and the grounding electrode of the second discharge tube are both electrically connected with one end of the inductor, and the other end of the inductor is grounded.
By adopting the scheme, the three-stage stepped lightning protection circuit can decompose the discharged lightning energy in a one-stage manner, attenuate the invasion of lightning current and voltage to the rear end protected equipment, provide a low and fast voltage protection level for the equipment, has the characteristic of fast corresponding time of lightning time protection, and has good protection effect; the scheme selects the lightning protection component with tiny junction capacitance, reduces the influence on the link transmission characteristic, reduces the whole insertion loss of the lightning protection circuit, and meets the requirements of high-speed transmission rate, multiple signal carrier transmission and other performances; the scheme with the grounding isolation suppression can prevent the high ground potential counterattack invasion and reduce the requirement on the resistance value of the grounding.
Drawings
Fig. 1 is a schematic view of the frame structure connection of the present invention.
Fig. 2 is a schematic circuit diagram according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Please refer to fig. 1, the present invention provides a network signal lightning protection circuit with ground isolation suppression, which includes: suppression circuit 2 is kept apart with ground connection to tertiary cascaded lightning protection circuit 1, tertiary cascaded lightning protection circuit 1 respectively with suppression circuit 2 is kept apart to ground connection, RJ45 input interface 3, 4 electric connection of RJ45 output interface, tertiary cascaded lightning protection circuit 1 is used for lightning protection, tertiary cascaded lightning protection circuit 1 includes: the lightning protection circuit comprises a front-stage main lightning protection circuit 11, a middle-stage decoupling lightning protection circuit 12 and a rear-stage precise lightning protection circuit 13, wherein the main lightning protection circuit 11 is used for discharging lightning current and electromagnetic pulse, the decoupling lightning protection circuit 12 is used for suppressing lightning current and ensuring that the main lightning protection circuit 11 works timely to discharge the lightning current before the precise lightning protection circuit 13 is damaged by lightning breakdown, the precise lightning protection circuit 13 is used for effectively discharging lightning current voltage in a quick response mode, and the grounding isolation suppression circuit 2 is used for preventing high-ground potential from counterstriking to enter equipment.
Specifically, referring to fig. 2, in this embodiment, the main lightning protection circuit 1 includes a first discharge tube and a second discharge tube (none of which is labeled), the decoupling lightning protection circuit includes first to fourth resistors R1, R2, R3 and R4, the precise lightning protection circuit includes a TVS array TVS1, the ground isolation suppression circuit includes an inductor L1, a first pole of the first discharge tube is electrically connected to a first data transmission pin of the RJ45 input interface (the RJ45 interface of 8 pins is selected according to the present invention, the first, second, third and sixth pins are data transmission pins, and are sequentially first to fourth data transmission pins), and one end of the first resistor R1, a second pole of the first discharge tube is electrically connected to a second data transmission pin of the RJ45 input interface and one end of the second resistor R2, and a first pole of the second discharge tube is electrically connected to a third data transmission pin of the RJ45 input interface, A third resistor R3 electrically connected to one end of the second discharge tube, a second electrode of the second discharge tube electrically connected to a fourth data transmission pin of the RJ45 input interface and a fourth resistor R4, a ground electrode of the first discharge tube and a ground electrode of the second discharge tube electrically connected to one end of the inductor L1, the other end of the inductor L1 being grounded, a first resistor R1 other end electrically connected to the first data transmission pin of the RJ45 output interface and the second end and the seventh end of the TVS array TVS1, a second resistor R2 other end electrically connected to the second data transmission pin of the RJ45 output interface, the first end and the eighth end of the TVS array TVS1, a third resistor R3 other end electrically connected to the third data transmission pin of the RJ45 output interface, the third end and the sixth end of the TVS1, and a fourth resistor R4 other end electrically connected to the fourth data transmission pin of the RJ 3535 output interface and the fourth data transmission pin of the TVS 45 output interface, The fourth end and the fifth end of the TVS array TVS1 are electrically connected. In the three-stage stepped lightning protection circuit in the scheme, the main lightning protection circuit at the front stage serves as the first-stage protection and is used for discharging lightning current and electromagnetic pulse, and the three-stage stepped lightning protection circuit is characterized in that the discharged current is large and strong. The middle-stage decoupling lightning protection circuit is used as a second-stage protection circuit, plays a role in restraining lightning current, time delay and energy coordination among circuits, and ensures that the front-stage main lightning protection circuit can work in time to discharge the lightning current before the rear-stage precise lightning protection circuit is broken down and damaged by lightning. The rear-stage precise lightning protection circuit is used as a third-stage protection, and the response time of the circuit at the front stage corresponding to lightning current and voltage can be slower than that of the circuit at the rear stage, so that the rear-stage precise lightning protection circuit can effectively discharge the lightning current and voltage in a quick response manner until the decoupling lightning protection circuit works to enable the main lightning protection circuit at the front stage to timely work to discharge the lightning current. In the scheme, due to the existence of the ground resistance value of the ground point PE, when lightning current is discharged to the ground, high voltage is generated at the PE to raise the ground potential at the PE, and due to the characteristic of inductance, low frequency resistance and high frequency are passed, and the lightning current belongs to high frequency, so that due to the existence of the inductance L1, great inductive reactance can be generated on the lightning current, and the lightning current and voltage are prevented from counterattacking and entering equipment.
In conclusion, the three-stage stepped lightning protection circuit can decompose the discharged lightning energy in a first stage and a second stage, and attenuate the invasion of lightning current and voltage to rear-end protected equipment, thereby providing a low and fast voltage protection level for the equipment, having the characteristic of fast corresponding time of lightning time protection and having good protection effect; the scheme selects the lightning protection component with tiny junction capacitance, reduces the influence on the link transmission characteristic, reduces the whole insertion loss of the lightning protection circuit, and meets the requirements of high-speed transmission rate, multiple signal carrier transmission and other performances; the scheme with the grounding isolation suppression can prevent the high ground potential counterattack invasion and reduce the requirement on the resistance value of the grounding.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. A network signal lightning protection circuit with ground isolation suppression, comprising: suppression circuit is kept apart to tertiary cascaded lightning protection circuit and ground connection, tertiary cascaded lightning protection circuit respectively with suppression circuit, RJ45 input interface, RJ45 output interface electric connection are kept apart to ground connection, tertiary cascaded lightning protection circuit is used for lightning protection, tertiary cascaded lightning protection circuit includes: the lightning protection circuit comprises a front-stage main lightning protection circuit, a middle-stage decoupling lightning protection circuit and a rear-stage precise lightning protection circuit, wherein the main lightning protection circuit is used for discharging lightning current and electromagnetic pulse, the decoupling lightning protection circuit is used for suppressing lightning current and ensuring that the main lightning protection circuit works timely to discharge the lightning current before the precise lightning protection circuit is not broken down by lightning, the precise lightning protection circuit is used for effectively discharging lightning current voltage in a quick response mode, and the grounding isolation suppression circuit is used for preventing high-ground potential from counterstriking to enter equipment.
2. The network signal lightning protection circuit with ground isolation suppression of claim 1, wherein the main lightning protection circuit includes a first discharge tube and a second discharge tube, the decoupling lightning protection circuit includes first to fourth resistors, the precision lightning protection circuit includes a TVS array, a first pole of the first discharge tube is electrically connected to a first data transmission pin of the RJ45 input interface and one end of the first resistor, respectively, a second pole of the first discharge tube is electrically connected to a second data transmission pin of the RJ45 input interface and one end of the second resistor, a first pole of the second discharge tube is electrically connected to a third data transmission pin of the RJ45 input interface and one end of the third resistor, respectively, a second pole of the second discharge tube is electrically connected to a fourth data transmission pin of the RJ45 input interface and one end of the fourth resistor, respectively, the earthing pole of first discharge tube and the earthing pole of second discharge tube all with suppression circuit one end electric connection is kept apart to ground connection, suppression circuit other end ground connection is kept apart to ground connection, the first resistance other end respectively with the first data transmission pin of RJ45 output interface the second end and the seventh end electric connection of TVS array, the second resistance other end respectively with the second data transmission pin of RJ45 output interface the first end and the eighth end electric connection of TVS array, the other end of third resistance respectively with the third data transmission pin of RJ45 output interface the third end and the sixth end electric connection of TVS array, the other end of fourth resistance respectively with the fourth data transmission pin of RJ45 output interface the fourth end and the fifth end electric connection of TVS array.
3. The network signal lightning protection circuit with ground isolation suppression according to claim 2, wherein the first and second discharge tubes are each H3R5-230SMD in model number.
4. The network signal lightning protection circuit with ground isolation suppression of claim 2, wherein the ground isolation suppression circuit is an inductor, the ground electrode of the first discharge tube and the ground electrode of the second discharge tube are both electrically connected to one end of the inductor, and the other end of the inductor is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020712878.9U CN212137274U (en) | 2020-04-30 | 2020-04-30 | Network signal lightning protection circuit with grounding isolation suppression |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020712878.9U CN212137274U (en) | 2020-04-30 | 2020-04-30 | Network signal lightning protection circuit with grounding isolation suppression |
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| CN212137274U true CN212137274U (en) | 2020-12-11 |
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| CN202020712878.9U Active CN212137274U (en) | 2020-04-30 | 2020-04-30 | Network signal lightning protection circuit with grounding isolation suppression |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112910484A (en) * | 2021-01-21 | 2021-06-04 | 睿高(广州)通信技术有限公司 | Lightning protection system for communication port of airborne power amplifier equipment |
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2020
- 2020-04-30 CN CN202020712878.9U patent/CN212137274U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112910484A (en) * | 2021-01-21 | 2021-06-04 | 睿高(广州)通信技术有限公司 | Lightning protection system for communication port of airborne power amplifier equipment |
| CN112910484B (en) * | 2021-01-21 | 2023-02-28 | 睿高(广州)通信技术有限公司 | Lightning protection system for communication port of airborne power amplifier equipment |
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