GB/T 24274-2019 代替 GB/T 24274—2009
低压抽出式成套开关设备和控制设备
Low-voltage withdrawable switch gear and controlgear assemblies
2019-10-18 发布
2020-05-01 实施
GB/T 24274—2019
目 次
前言...........................................m
1范围..........................................1
2规范性引用文件.....................................1
3术语和定义.......................................1
4分类..........................................2
4.1按用途分类.....................................2
4.2按売体类型分类..................................2
5接口特性........................................2
5.1通则........................................2
5.2电压额定值.....................................3
5-3电流额定值.....................................3
5.4额定分散系数...................................3
5.5额定频率......................................4
5.6其他特性......................................4
6信息.........4
6.1铭牌...............................................4
6.2标志...............................................4
6.3其他资料.....................................5
7使用条件.......................................5
7.1正常使用条件...................................5
7.2特殊使用条件...................................6
7.3运输、存放和安装条件................................7
8结构要求.......................................7
8.1材料和部件的强度..................................7
8.2成套设备外売的防护等级...............................8
8.3电气间隙、爬电距离和隔离距离............................8
&4 电击防护......................................10
8.5开关器件和元件的组合................................12
8.6功能单元......................................15
8.7    内部电路和连接...................................15
8.8    冷却.........................................17
8-9外接导线端子....................................17
8.10成套设备的内部隔离................................18
9性能要求.........................................19
9.1介电性能......................................19
9.2温升极限......................................20
9.3短路保护和短路耐受强度.................................22
9.4电磁兼容性(EMC) ................................ 23
9.5电气操作........................................23
10验证............................................23
10.1 通则........................................23
10.2材料和部件的强度...................................23
10.3成套设备的防护等级 ................................ 24
10.4电气间隙、爬电距离和隔离距离.............................24
10.5电击防护和保护电路完整性...............................24
10.6开关器件和元件的组合.................................25
10.7功能单元互挨性试验..................................25
10.8内部电路和连接....................................25
10.9外接导线端子.....................................25
10.10介电性能......................................25
10.11 温升.......................................25
10.12短路耐受强度....................................25
10.13电磁兼容性.....................................26
10.14机械操作......................................26
10.15电气操作..................................... 27
附SA (资料性附录)成套设备的绝缘水平............................28
参考文献............................................29