低压交流三相配电系统中四极开关的应用探讨  

Discussion about Application of Four-Pole Switches in Low Voltage Three-Phase AC Power Distribution System

作　　者：季节[1] 董家业[1] 

机构地区：[1]同济大学建筑设计研究院,上海200092

出　　处：《现代建筑电气》2010年第2期42-46,共5页Modern Architecture Electric

摘　　要：在低压交流三相线路中,往往需要根据负荷情况或线路的保护要求设置不同极数的断路器、起动器或刀熔开关,以用作线路的电气隔离、短路保护、过负荷保护、接地故障保护、防电击。在工程设计中,应掌握分寸,根据不同的接地制式和使用条件选用四极开关还是三极开关。通过详细分析,阐述了四极开关的应用范围,给出了选用四极开关时的注意事项,供同行选用开关时参考。In low voltage three-phase AC circuits,the breakers,starters and knife-blade fuses with different number of poles were used for electrical isolation,short-circuit,overload and ground-fault protection.Consideration must be taken to choose between four-pole or three-pole switches according to the grounding types and operating conditions in the electrical design.Through analyzing,the scope of application of four-pole switches was expounded,the considerations about selecting the four-pole switch were given in o...

关 键 词：电气隔离 电气控制 电气保护 接地制式 四极开关 

分 类 号：TM564[电气工程—电器]