PoE交换机雷击浪涌防护设计  

The design of Po E switch surge protection

作　　者：张文[1] 曹敏[1] 郜杰[1] 

机构地区：[1]武汉邮电科学研究院烽火网络有限责任公司,湖北武汉430074

出　　处：《电子设计工程》2015年第6期99-102,共4页Electronic Design Engineering

摘　　要：Po E(Power over Ethernet)交换机雷击浪涌防护设计在现阶段具有重要意义。本文分析了三种主要浪涌防护器件特性,比较其各自优缺点,在针对不同使用环境下Po E交换机的防护电路设计中,将三种防护器件分别组合使用,得到具体防护电路。最后,将所得电路进行雷击测试,测量经过防护电路之后的波形,最终证明,所设计电路能够起到抗雷击浪涌保护电路的作用。Nowadays, the design of Po E switch＇s surge protection is of great significance. This letter analyzes three types of major surge protection device（SPD） and compares the advantages and disadvantages respectively. During the detailed design aimed at distinguished Po E switches applied in different circumstances, these SPDs are used in combination and finally the protection circuits are obtained. Ultimately, the circuits are tested under surge and the voltage waveforms passed through the circuits are gotten, which prove these circuits indeed effect the protection function.

关 键 词：PoE交换机 气体放电管 压敏电阻 TVS管 雷击浪涌测试 

分 类 号：TN919.4[电子电信—通信与信息系统]