CN213341640U

CN213341640U - Gigabit POE lightning protection circuit

Info

Publication number: CN213341640U
Application number: CN202021586365.4U
Authority: CN
Inventors: 邝招财
Original assignee: Foshan Shunde Great Power Co ltd
Current assignee: Foshan Shunde Great Power Co ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-06-01
Anticipated expiration: 2030-08-04

Abstract

The utility model discloses a giga POE lightning protection circuit, including discharge tube GDT1-GDT4, resistance MOV1-MOV1, transient voltage suppressor TVS1-TVS4 and network transformer LC1, discharge tube GDT 1's 1 foot and 3 feet are connected at power supply interface 1, between 2 feet and network transformer LC 1's winding N1, transient voltage suppressor TVS1 is connected at data interface 1, between 2 feet and network transformer LC 1's winding N2, discharge tube GDT 1's 2 feet are through being connected the earth with resistance MOV1, GDT 2's 1 foot and 3 feet are connected at power supply interface 3, between 4 feet and network transformer LC 1's winding N3, the utility model discloses when taking place the thunderbolt, no matter be the common mode thunderbolt, still the differential mode, the thunderbolt electric energy can both pass through the utility model discloses the circuit forms the release circuit, the lightning protection level is high, and the barrier propterty is good.

Description

Gigabit POE lightning protection circuit

Technical Field

The utility model relates to a detect technical field, specifically a gigabit POE lightning protection circuit.

Background

Poe (power Over ethernet) is an innovative technology and is increasingly used to power network devices, including ip phones, wireless LAN access points, webcams, and other network applications. The current POE technology is originally derived from IEEE 802.3af standard, transmits a direct current power supply by using the existing network cabling (CAT-5), transmits a signal and simultaneously transmits the power supply to electric equipment, such as a wireless AP, an IP phone, a network camera and the like, and saves a local power supply. The POE has the advantages that data and power transmission can be completed by using a group of cables, installation time and cost are reduced, and space is saved. Because POE equipment can be conveniently inserted into a network socket supporting POE and a standard RJ45 interface, SP can be used by inserting; therefore, the lightning protection device can be moved very easily, most of the mainstream POE network lightning protection devices in the market adopt one of the two power supply modes, the compatibility of the two power supply modes of the existing POE network can not be basically achieved, the universality is not high, and the lightning protection effect is not ideal.

The existing signal detection technology can detect a single signal intelligently, and the automatic switching function can not be realized when multiple signals enter simultaneously.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a giga POE lightning protection circuit to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a gigabit POE lightning protection circuit comprises discharge tubes GDT1-GDT4, resistors MOV1-MOV4, a transient voltage suppressor TVS1-TVS4 and a network transformer LC1, wherein 1 pin and 3 pins of the discharge tube GDT1 are connected in parallel between a

power supply interface

1 and 2 pins and a winding N1 of the network transformer LC1, the transient voltage suppressor TVS1 is connected in parallel between a

data interface

1 and 2 pins and a winding N2 of the network transformer LC1, 2 pins of a discharge tube GDT1 are connected to the ground through a resistor MOV1, 1 pin and 3 pins of a discharge tube GDT2 are connected in parallel between a power supply interface 3 and 4 pins and a winding N3 of the network LC1, the transient voltage suppressor TVS2 is connected in parallel between data interface 3 and 4 pins and a winding N4 of the network transformer LC1, 2 pins of the discharge tube GDT1 are connected through a winding N1 of the ground resistor, 1 pin of the discharge tube GDT1 is connected between a winding N1 and a network transformer 1, the transient voltage suppressor TVS3 is connected in parallel between pins 5 and 6 of a data interface and a winding N6 of a network transformer LC1, pin 2 of a discharge tube GDT1 is connected to the ground through a resistor MOV3, pin 1 and pin 3 of a discharge tube GDT4 are connected in parallel between pins 7 and 8 of a power supply interface and a winding N7 of a network transformer LC1, the transient voltage suppressor TVS4 is connected in parallel between pins 7 and 8 of the data interface and a winding N8 of a network transformer LC1, and pin 2 of a discharge tube GDT1 is connected in large through a resistor MOV 4.

As a further technical solution of the present invention: the power supply interface is an RJ45 power supply interface.

As a further technical solution of the present invention: the data interface is an RJ45 data interface.

As a further technical solution of the present invention: the resistors MOV1-MOV4 are all piezoresistors.

As a further technical solution of the present invention: the transient voltage suppressor TVS1-TVS4 employs the SMCJ series.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses when taking place the thunderbolt, no matter be the common mode thunderbolt, still differential mode thunderbolt, the thunder electric energy can both pass through the utility model discloses the circuit forms release circuit, and the lightning protection level is high, and barrier propterty is good.

Drawings

Fig. 1 is a circuit diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, embodiment 1: a gigabit POE lightning protection circuit comprises discharge tubes GDT1-GDT4, resistors MOV1-MOV4, a transient voltage suppressor TVS1-TVS4 and a network transformer LC1, wherein 1 pin and 3 pins of the discharge tube GDT1 are connected in parallel between a

power supply interface

data interface

The power supply interface is an RJ45 power supply interface. The data interface is an RJ45 data interface. The resistors MOV1-MOV4 are all piezoresistors. The voltage dependent resistor MOV1-MOV4 can effectively eliminate surge interference, when the circuit is impacted by voltage exceeding a normal value, such as surge voltage or lightning stroke, the circuit is instantly changed into a short-circuit state to protect the circuit from being damaged, the transient voltage suppressor TVS1-TVS4 can eliminate harmonic interference in commercial power, and the two are combined, each path has double protection, so that the safety is higher, and the stability is better.

Embodiment 2, based on embodiment 1, the transient voltage suppressor TVS1-TVS4 adopts SMCJ series, which can be selected in various types, specifically according to actual application requirements.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A gigabit POE lightning protection circuit, comprising discharge tubes GDT1-GDT4, resistors MOV1-MOV4, transient voltage suppressor TVS1-TVS4 and network transformer LC1, characterized in that 1 and 3 pins of the discharge tube GDT1 are coupled in parallel between the supply interface 1,2 pins and the winding N1 of the network transformer LC1, the transient voltage suppressor TVS1 is coupled in parallel between the data interface 1,2 pins and the winding N2 of the network transformer LC1, 2 pins of the discharge tube GDT1 are connected to the ground through resistors MOV1, 1 and 3 pins of the GDT2 are coupled in parallel between the supply interface 3,4 pins and the winding N3 of the network transformer LC1, the transient voltage suppressor S2 is coupled in parallel between the data interface 3,4 pins and the winding N4 of the network transformer LC1, 2 pins of the GDT1 are connected to the ground through resistors MOV1, and the discharge tube TVS 8672 is coupled between the supply interface TV pin 1 and the supply interface N1, the transient voltage suppressor TVS3 is connected in parallel between pins 5 and 6 of a data interface and a winding N6 of a network transformer LC1, pin 2 of a discharge tube GDT1 is connected to the ground through a resistor MOV3, pin 1 and pin 3 of a discharge tube GDT4 are connected in parallel between pins 7 and 8 of a power supply interface and a winding N7 of a network transformer LC1, the transient voltage suppressor TVS4 is connected in parallel between pins 7 and 8 of the data interface and a winding N8 of a network transformer LC1, and pin 2 of a discharge tube GDT1 is connected in large through a resistor MOV 4.

2. The gigabit POE lightning protection circuit of claim 1, wherein the power interface is an RJ45 power interface.

3. The gigabit POE lightning protection circuit of claim 1, wherein the data interface is an RJ45 data interface.

4. The gigabit POE lightning protection circuit according to claim 1, wherein the resistors MOV1-MOV4 are all voltage dependent resistors.

5. A lightning protection circuit for gigabit POE according to any of claims 1 to 4, wherein the transient voltage suppressor TVS1-TVS4 is in the SMCJ series.