An Ethernet interface anti-surge circuit

Abstract

The present invention proposes an anti-surge circuit for an Ethernet interface. By setting a power supply protection circuit, it mainly protects the differential mode protection of live wires and neutral wires and the common mode protection of live wires to ground and neutral wires to ground; The protection circuit can choose different paths for the positive and negative currents to absorb the high-power current and play a protective role; by setting the first-level protection circuit and the second-level protection circuit in the protection circuit, the differential mode protection capability of the network port is enhanced. And it will not affect the network transmission performance, can guarantee the original network transmission distance and transmission speed, the network transmission distance and network port waveform can meet the specification requirements, and has a good lightning protection effect.

Description

Technical field [0001] The present invention relates to the field of power communication, and more particularly to an Ethernet interface anti-surge circuit. Background technique [0002] Power communication devices are generally used to monitor and communications over the entire grid. Since the high-pressure deal is often dealt with high pressure, the network port of the communication device needs to meet the surge and pressure requirements for specific application scenarios. Surge protection method is to effectively guide the energy of lightning, but the pressure-resistant method is to require the equipment to prevent high-voltage on-forming current, one is the guide one is the resistance, the two protection is a contradiction . Among the many power communication equipment development manufacturers, you basically realize surges by installing a network of lightning protection, by removing the network port lightning protection device to over-pressure, and cannot meet the electrici...

AI Technical Summary

Problems solved by technology

Among many power communication equipment development manufacturers, everyone basically realizes the surge by installing the lightning protection device of the network port, and overvoltage by removing the lightning protection device of the network port. Network port surge and withstand voltage protection requirements, because the new standards ITU-TK.21 and K.44 increase the differential mode protection requirements of POE (Power Over Ethernet active Ethernet) equipment, so the POE equipment we design and produce Must have differential mode protection

However, in the existing technology, there are problems that cannot meet the surge and withstand voltage protection requirements of the power network port at the same time, and the differential mode protection capability of POE equipment is poor.

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