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Protective device of direct current power supple for communication equipment

A technology of DC power supply and communication equipment, which is applied in the direction of emergency protection circuit device, circuit device, emergency protection circuit device, etc. for limiting overcurrent/overvoltage, and can solve the problem of poor lightning protection ability and poor resistance to various electromagnetic interferences and other problems, to achieve the effect of low lightning strike current, solve high and low frequency interference, and prevent input voltage jumps

Inactive Publication Date: 2010-04-21
FENGHUO COMM SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to solve the problem of poor lightning protection ability and poor anti-multiple electromagnetic interference (EMI) ability of the protection device of the DC power supply for communication equipment

Method used

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  • Protective device of direct current power supple for communication equipment
  • Protective device of direct current power supple for communication equipment
  • Protective device of direct current power supple for communication equipment

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Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0015] Such as figure 1 , figure 2 As shown, the DC power supply for communication equipment has three output terminals of 0V, -48V and PE (grounding wire). This protective device is connected to the output terminal of the DC power supply for comprehensive protection of the DC power supply. The protective device Including lightning strike protection module, overvoltage and undervoltage protection module, filtering module and DC / DC module.

[0016] The lightning strike protection module includes a primary protection unit, a display unit, a secondary protection unit and a fuse FU2. The primary unit is used to discharge current and discharge large-capacity lightning strike current. The first, second and third three piezoresistors MOV 1 , MOV 2 , MOV 3 constituted where the first varistor MOV 1 After being connected in series with the fuse FU2, it is connected to t...

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Abstract

The invention relates to a protective device of direct current power supple for communication equipment and belongs to the technical field of direct current power supply. The protective device comprises a lightning strike protection module, an over / under-voltage protection module, a wave filtering module and a DC-DC power supply module, wherein the lightning strike protection module comprises a primary protection unit, a display unit, a secondary protection unit and a protective tube FU2; the wave filtering module comprises a low-frequency wave filtering unit, a high-low frequency decoupling unit and a high-frequency wave filtering unit. In the invention, a comprehensive protection method based on the cooperation of the three modules, i.e., a reasonable design between two stages of lightning protection in which the first stage of lightning protection is used for aerial drainage and the second stage of lightning protection is used for clamping, is adopted to drain amplified lightning stroke current and to ensure a lower residual voltage value; the over / under-voltage protection of the control of a power supply management module on the power supply module is adopted to prevent the influence from input voltage jumping; meanwhile; the wave filtering mode combining the low-frequency filtered wave and the high-frequency filtered wave is adopted to effectively solve the problems of protection from lightning stoke damage in the direct current power supply for the communication equipment and high-low frequency interference.

Description

technical field [0001] The invention relates to the technical field of a DC power supply, in particular to a protection device for a DC power supply used in communication equipment. Background technique [0002] With the development of science and technology, the performance of communication system equipment is getting higher and higher, and the use environment is becoming more and more complex, so the requirements for power supply of communication equipment are also getting higher and higher. At present, the DC power supply of some communication equipment is not designed with a comprehensive protection method, which will not only cause soft failures such as inexplicable crashes and unstable operation of the communication equipment, but it is generally difficult for the equipment to pass the electromagnetic compatibility performance test, especially the GB Surge (shock) immunity specified in / T 17626.5-2008, standard limit value of conducted disturbance immunity induced by r...

Claims

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Application Information

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IPC IPC(8): H02H9/04H02H3/20H02H3/24H02J1/02
Inventor 刘江锋邹崇振游汉涛
Owner FENGHUO COMM SCI & TECH CO LTD
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