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Ethernet port lightning protection device and lightning protection circuit

A lightning protector and lightning protection circuit technology, applied in emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, circuit devices, etc., can solve the problem of large PCB printed board space and protection devices Problems such as large volume and high design cost achieve the effect of improving lightning protection capability, convenient deployment, and saving design cost

Active Publication Date: 2010-06-02
MAIPU COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these protection devices are large in size and need to occupy a large PCB printed board space, especially when the number of ports is large, the design cost is relatively high.

Method used

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  • Ethernet port lightning protection device and lightning protection circuit
  • Ethernet port lightning protection device and lightning protection circuit
  • Ethernet port lightning protection device and lightning protection circuit

Examples

Experimental program
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Effect test

Embodiment Construction

[0019] External Ethernet port lightning protection circuit, such as Figure 4 As shown, in the case of not making any changes to the original network equipment, it is only necessary to connect a small size lightning protector (about 4×2×1.5cm) in series outside the Ethernet port, and one end of the lightning protector is connected to the Ethernet port. The network port is connected, and the other end is connected to the external environment (where it may be struck by lightning), so as to achieve the purpose of lightning protection. Both ends of the lightning protector are in the form of RJ45 sockets. The end near the Ethernet port is the RJ45 port on the protected side, and the one near the outside is the RJ45 port on the outside line side. Add a section of network cable to the original network cable to connect. . The key component of the lightning protector is a 1:1 isolation transformer, which is a second-level isolation transformer added to the first-level isolation transf...

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PUM

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Abstract

The invention relates to an Ethernet port circuit and provides an external Ethernet port lightning protection circuit, an external lightning protection device and an internal Ethernet port lightning circuit which are used for improving the lightning surge preventing capability of the traditional Ethernet port. A primary isolated transformer is added on the basis of the traditional first-stage isolated transformer to form a double isolated protection; the Ethernet port lightning protection device is added on the external Ethernet port lightning protection circuit under the condition without making any change on the traditional network equipment, so that the lightning preventing capability of the network equipment is remarkably improved, an extra grounded wire is free from being arranged and the deployment is convenient. The internal Ethernet port lightning circuit adopts the compatible design, and an RJ45 with a transformer port is used to doubly improve the lightning preventing capability while not adding the area of a printed circuit board when the lightning preventing protection needs enhancing.

Description

technical field [0001] The present invention relates to Ethernet port circuits. Background technique [0002] With the rapid development of Ethernet technology and the vigorous construction of broadband networks, Ethernet switches / routers are important access devices. However, the expansion and deterioration of the application environment of Ethernet switches / routers, especially in environments such as corridors, greatly increases the possibility of them being subjected to overvoltage shocks such as lightning strikes and surges. When lightning occurs, it will generate huge induction energy, which will pose a threat to various network devices, including personal computers / laptops, Ethernet switches / routers and other Ethernet devices interconnected with twisted-pair cables. [0003] The basic structure of the Ethernet port mainly consists of Ethernet chips, isolation transformers, RJ45 ports and other components. There is no direct electrical connection between the primary a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04
Inventor 钟昌盛
Owner MAIPU COMM TECH CO LTD
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