A three-level lightning protection module for network port protection
A three-level lightning protection and lightning protection system technology, applied in the field of lightning protection and communication, can solve the problems of high protection requirements and high signal quality requirements, and achieve the effect of high protection level
Active Publication Date: 2018-04-24
HANGZHOU DUNCHONG SCI & TECH
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Designed to solve the problems of high protection requirements and high signal quality requirements
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[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.
[0026] see figure 1 , discloses a three-level lightning protection module based on POE power supply according to a specific embodiment of the present invention. , which includes RJ45 interface 1 on the input side, isolation transformer 2 and RJ45 interface 3 on the output side. There are 4 pairs of differential data lines, a gas discharge tube is connected in parallel between each pair of data lines, and the middle pin of the gas discharge tube is grounded;
[0027] The second-level lightning protection system i...
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A three-level lightning protection module based on network port protection, in which the first-level lightning protection system is located on the input side RJ45 interface side, including four gas discharge tubes connected in parallel between differential data lines, and the second-level lightning protection system is located on the isolated Transformer, a line is drawn from the center tap of each winding of the isolation transformer, and a varistor is connected in series to the ground; the third-level lightning protection system A is also located in the isolation transformer, and the center tap of each winding of the isolation transformer The wires drawn from the taps are connected in series with an inductor and then connected in series with a bipolar transient voltage suppression tube to the ground; the third-level lightning protection system B is located in the isolation transformer and is divided into 4 protection groups, each of which includes a rectifier bridge and A unidirectional TVS tube connected in parallel with the rectifier bridge. The invention has the advantages of high protection level, skillful handling of TVS tube junction capacitance, no signal attenuation, reasonable use of response time and flow rate of each element, and multi-level protection.
Description
technical field [0001] The invention relates to the field of lightning protection and communication, in particular, to a three-level lightning protection module applied to the protection of 10 / 100 / 1000M network ports. Background technique [0002] The lightning protection board is a device that connects the motherboard and the external interface and can suppress surges, ESD, lightning and other impacts. With the development of wireless WIFI, wireless coverage and wireless monitoring have been extensively constructed. These devices are usually placed outdoors to withstand the impact of wind, rain and lightning, which urgently needs to enhance the lightning protection capability of the product. In particular, power over Ethernet is often used in network devices, and Power Over Ethernet (PoE) is a technology for integrating power supply into standard local area network devices. It can supply power to network devices, such as IP phones, IP cameras and APs, by using the same ca...
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IPC IPC(8): H02H9/04
Inventor 彭伟杰杨凯敏杨盼盼
Owner HANGZHOU DUNCHONG SCI & TECH