CN2874885Y - Network lightning arrester - Google Patents
Network lightning arrester Download PDFInfo
- Publication number
- CN2874885Y CN2874885Y CN 200520060071 CN200520060071U CN2874885Y CN 2874885 Y CN2874885 Y CN 2874885Y CN 200520060071 CN200520060071 CN 200520060071 CN 200520060071 U CN200520060071 U CN 200520060071U CN 2874885 Y CN2874885 Y CN 2874885Y
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- network
- circuit
- lightning
- diode
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- Expired - Lifetime
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Abstract
The utility model discloses a network lighting arrestor, which comprises a network interface and a lighting arrestor circuit. A first-stage lighting arrestor circuit is composed by sequentially connecting input end of circuit with discharge tube and ground wire. Second-stage lighting arrestor circuit is composed by connecting diode group with primary stage of network transformer in parallel, and further connecting with two varistors in series at two ends. Signal is converted by the network transformer after passing through the second-stage lighting arrestor circuit, and outputted after protection of another diode group. Once the network equipment is subjected to lighting strike, the network lighting arrester can response instantaneously to effectively relieve voltage surge caused by lighting strike, so as to guarantee safety of network equipment. The diode group is composed of ordinary diodes, and can realize better usage effect than TVS (Transient Voltage Suppressor).
Description
Technical field
The utility model relates to a kind of lightning arrester.Especially a kind of lightning arrester that is used in the computer network connection.
Background technology
Thunder and lightning causes the scope of natural calamity to enlarge day by day, and particularly Lightning Electromagnetic Pulse is to the destruction of widely used microelectronic device of all trades and professions and system.And in today that electronic information technology develops rapidly, the computer network information carrier that is absolutely necessary, because computer interconnects by the network equipment, when thunderbolt takes place the time, if lightning protection is not installed, the voltage surge that moment produced can connect bamboo telegraph by network, so not only can cause the damage of the network equipment, more seriously may cause the paralysis of ten million interconnected computer, cause loss difficult to the appraisal.Therefore, in order to reduce the massive losses that causes equipment such as network and computer because of thunderbolt, should promote the application of network lightning arrester.
Summary of the invention
The purpose of this utility model is to provide a kind of network lightning arrester, reacts immediately when the moment that the network equipment is struck by lightning, and alleviates the voltage surge that is produced, and guarantees the safety of the network equipment.
The utility model is to realize above-mentioned purpose like this:
The network lightning arrester comprises network interface and lightning circuit, and wherein lightning circuit has two identical loops, and input and output are connected with output interface with the input interface of network interface respectively; Each loop of lightning circuit is made up of discharge tube, piezo-resistance, diode group and network transformer, there are two discharge tube one ends to be connected with the lightning circuit input respectively, an other end ground connection, there is two ends, the elementary back in parallel of one group of diode group and the network transformer piezo-resistance of connecting respectively to be connected with the lightning circuit input again, also has the secondary back output in parallel of other one group of diode group and network transformer as lightning circuit.
Wherein, especially described two groups of diode groups are made up of eight general-purpose diodes respectively, wherein per four diodes series connection, and one group of diode in series and other one group of diode in series reverse parallel connection, result of use is good.
The beneficial effects of the utility model are: in case when the network equipment is struck by lightning, the network lightning arrester is reacted immediately, can effectively alleviate because the voltage surge that thunderbolt is produced, thereby ensured the safety of the network equipment, and the diode group is made up of general-purpose diode, can make lightning arrester better than the result of use that adopts the transient state pipe.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified:
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
With reference to Fig. 1, the network lightning arrester comprises network interface and lightning circuit.Wherein network interface comprises input interface and output interface, and the both is the RJ45 interface, and 1,2 pin wherein and 3,6 pin are connected with two loops of lightning circuit respectively.Because the reception of Network Transmission and the symmetry of transmission, the circuit structure that adopt in two loops of lightning circuit is identical.The lightning-arrest design of secondary is adopted in each loop of described lightning circuit, the input that comprises the loop is connected the first order lightning circuit that the back earth connection is formed with discharge tube SAD1, SAD2, the second level lightning circuit of connecting and formed with two piezo-resistance R1, R2 respectively in one group of diode group D1 and the elementary two ends afterwards in parallel of network transformer T input.Network signal through behind the secondary lightning circuit again by network transformer T transmission, after the secondary and other one group diode group D1 of network transformer T is in parallel as the output of lightning circuit.
Wherein said two groups of diode groups comprise eight diodes respectively, wherein per four diodes series connection, one group of diode in series and other one group of diode in series reverse parallel connection.Employed diode is a general-purpose diode, can make lightning arrester better than the result of use that adopts the transient state pipe.
As long as being connected on network, the network lightning arrester connects upward during use; when in case the network equipment is struck by lightning; when voltage surge is delivered to the network lightning arrester along network connectivity; discharge tube SAD1 in the lightning circuit in the first order lightning circuit, SAD2 conducting discharge the energy of thunderbolt to ground wire; but this moment, the voltage of network may still can be higher than normal working voltage, needed to rely on second level lightning circuit further to protect.Second level lightning circuit mainly is made up of piezo-resistance and diode; operating characteristic according to diode; there is forward conduction voltage drop; and two groups of diode group D1; D2 is respectively after the diode series connection reverse parallel connection again; the elementary parallel connection of network transformer T diode group D1; therefore; be applied to the elementary voltage of network transformer T and can be higher than the magnitude of voltage that addition falls in four diode forward conducting voltage; and T level of network transformer also is parallel with identical diode group D2; so the voltage of network lightning arrester output can not be higher than normal operating voltage, that is to say to be protected to having played effectively with the network equipment that is connected of network lightning arrester.Wherein piezo-resistance R1, R2 play the effect of current limliting.
The present networks lightning arrester can connect needs according to network, can adopt a pair of above network interface, and the lightning circuit that each network interface connected is identical.
Claims (3)
1. the network lightning arrester is characterized in that comprising network interface and lightning circuit, and wherein lightning circuit has two identical loops, and input and output are connected with output interface with the input interface of network interface respectively; Each loop of lightning circuit is made up of discharge tube, piezo-resistance, diode group and network transformer, there are two discharge tubes (SAD1), (SAD2) end to be connected with the lightning circuit input respectively, an other end ground connection, there be connect respectively piezo-resistance (R1), (R2) of two ends, the elementary back in parallel of one group of diode group (D1) and network transformer (T) to be connected with the lightning circuit input again, also have the secondary back output in parallel of other one group of diode group (D2) and network transformer (T) as lightning circuit.
2. network lightning arrester according to claim 1 is characterized in that two groups of diode groups (D1), (D2) are made up of eight diodes respectively, wherein per four diodes series connection, one group of diode in series and other one group of diode in series reverse parallel connection.
3. network lightning arrester according to claim 1, the quantity that it is characterized in that the input of network interface and output interface be a pair of more than, the quantity of lightning circuit is corresponding with the quantity of network interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520060071 CN2874885Y (en) | 2005-06-15 | 2005-06-15 | Network lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520060071 CN2874885Y (en) | 2005-06-15 | 2005-06-15 | Network lightning arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2874885Y true CN2874885Y (en) | 2007-02-28 |
Family
ID=37781474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520060071 Expired - Lifetime CN2874885Y (en) | 2005-06-15 | 2005-06-15 | Network lightning arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2874885Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101488666B (en) * | 2008-01-18 | 2010-12-08 | 研祥智能科技股份有限公司 | Network port lightning preventing circuit and RJ45 interface apparatus thereof |
| CN102324738A (en) * | 2011-09-28 | 2012-01-18 | 株洲普天中普防雷科技有限公司 | Gigabit network thunder preventing method and device |
-
2005
- 2005-06-15 CN CN 200520060071 patent/CN2874885Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101488666B (en) * | 2008-01-18 | 2010-12-08 | 研祥智能科技股份有限公司 | Network port lightning preventing circuit and RJ45 interface apparatus thereof |
| CN102324738A (en) * | 2011-09-28 | 2012-01-18 | 株洲普天中普防雷科技有限公司 | Gigabit network thunder preventing method and device |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150615 Granted publication date: 20070228 |