ICS29.120.40K31中华人民共和国国家标准GB14048.3—2002代替GB14048.3-1993低压开关设备和控制设备第3部分：开关、隔离器、隔离开关及熔断器组合电器Low-voltageswitchgearandcontrolgearpart3:Switches,disconnectors,switch-disconnectorsandfuse-combinationunits（IEC60947-3:2001,IDT）2002-06-13发布2003-01-01实施中华人民共和国国家质量监督检验检疫总局发布GB14048.3—2002目次前言...................................................................................IV1总则..................................................................................11.1范围................................................................................11.2规范性引用文件......................................................................12定义..................................................................................23分类..................................................................................33.1按照使用类别分类....................................................................33.2按照人力操作电器的方式分类..........................................................33.3按照隔离的适用性分类................................................................43.4按照所提供的防护等级分类............................................................44特性..................................................................................44.1特性概述............................................................................44.2电器型式............................................................................54.2.1极数..............................................................................54.2.2电流种类..........................................................................54.2.3主触头位置数（若有二个以上位置时）................................................54.3主电路的额定值和极限值..............................................................54.3.1额定电压..........................................................................54.3.2电流...............................................
