Lightning protection circuit and lightning protection method for direct-current power supply port of communication equipment

A technology of lightning protection circuit and lightning protection circuit, which is applied in the direction of emergency protection circuit device, emergency protection circuit device, circuit device, etc. for limiting overcurrent/overvoltage, and can solve the problem of high residual voltage and long residual voltage maintenance time , the circuit and components are difficult to be compatible, and the scope of application is single, so as to reduce the risk of lightning damage, wide application range, and small circuit components.

Inactive Publication Date: 2014-12-31
FENGHUO COMM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the space limitation of the components of the communication equipment, the DC power port of the communication equipment used in the outdoor scene cannot use a single protective device to complete the lightning protection function. Therefore, it is difficult to use the communication equipment with a single protective device in the outdoor scene. Its scope of application is relatively single, and it is difficult to meet the needs of communication operators
[0006] (2) Although the multi-level voltage limiting and decoupling circuit can protect the communication equipment in the outdoor scene, the lightning protection effici

Method used

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  • Lightning protection circuit and lightning protection method for direct-current power supply port of communication equipment

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[0034] The present invention will be further described in detail below in conjunction with the drawings and embodiments.

[0035] See figure 1 As shown, the lightning protection circuit for the DC power port of the communication device in the embodiment of the present invention includes a differential-mode first-level lightning protection circuit, a decoupling network, a differential-mode second-level lightning protection circuit, and a common-mode lightning protection circuit .

[0036] The input end of the DC power supply of communication equipment is connected to the output end of the power supply through a differential mode first-level lightning protection circuit, a decoupling network, and a differential mode second-level lightning protection circuit. The input end of a communication equipment DC power supply is connected through a common mode lightning protection circuit Connect to the protective ground PE.

[0037] The differential mode first-level lightning protection circu...

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Abstract

The invention discloses a lightning protection circuit and a lightning protection method for direct-current power port of communication equipment, which relate to the application field of communication equipment products. The circuit comprises a differential-mode first-stage lightning protection circuit, an uncoupling network, a differential-mode second-stage lightning protection circuit and a common-mode lightning protection circuit, wherein the differential-mode first-stage lightning protection circuit roughly limits the abruptly changing voltage of the direct-current power supply of the communication equipment, the uncoupling network forms a time-lag effect on the abruptly changing voltage and current of the direct-current power supply of the communication equipment, and carries out the function of uncoupling between the differential-mode first-stage lightning protection circuit and the differential-mode second-stage lightning protection circuit, the differential-mode second-stage lightning protection circuit accurately limits the residue of differential-mode first-stage lightning voltage, so that the direct-current power supply of the communication equipment can be protected from the surge of over-voltage and over-current energy, and the common-mode lightning protection circuit connects the abruptly changing current of the direct-current power supply of the communication equipment with protective earth (PE). The efficiency of lightning protection is high, the lasting time of residual voltage is short, the risk that the direct-current power port of the communication equipment is damaged by lightning can be decreased, and the lightning protection circuit not only is safe, but also has a wide application range, and is convenient to use by people.

Description

technical field [0001] The invention relates to the application field of communication equipment products, in particular to a lightning protection circuit and method for a DC power port of communication equipment. Background technique [0002] With the rapid development of information technology, communication operators have higher and higher requirements for the use environment of communication equipment. Many office (station) communication equipment (hereinafter referred to as communication equipment) are connected to unmanned stations, outdoor cabinets, poles, etc. Used in outdoor scenes. [0003] The functional circuit of the DC power port of the existing communication equipment includes a main-standby power combination control circuit, an electromechanical management circuit, a DC / DC (direct current chopper) isolated power circuit, an EMI (Electromagnetic Interference, electromagnetic interference) circuit, and the like. When the functional circuit of communication equ...

Claims

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Application Information

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IPC IPC(8): H02H9/04H02H9/06
CPCH02H9/04H02H9/06
Inventor 李虎
Owner FENGHUO COMM SCI & TECH CO LTD
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