GB3804-2004-3.6KV-40.5KV高压交流负荷开关

ICS 29 K 43 120.60 巧日 中 华 人 民 共 和 国 国 家 标 准 GB 3804- 2004 代替 GB 3804-1990 3.6 kV~ 40.5 kV高压交流负荷开关 High-voltage alternating-current switches for rated voltage above 3. 6 kV and less than 40. 5 kV (IEC 60265-1:1998 High-voltage switches-Partl:Switches for rated voltage above 1 kV and less than 52 kV，MOD) 2004-05-14发布 2005-02-01实施 中华人民共和国国家质量监督检验检疫总局 中 国 国 家 标 准 化 管 理 委 员 会 发 布 GB 3804- 2004 目 次 前言 ·······································，························，·················································⋯⋯ V 1 范 围 ·······································，·················，··················································⋯ ⋯ 1 2 规范性引用文件 ······················································⋯⋯，·⋯ ，................... ......⋯⋯ 1 3 正常和特殊使用条件 ·········，···············································································⋯⋯ 1 3.1 正常使用条件 ···········································........................... ....................⋯⋯，1 3.2 特殊使用条件 ·····················································⋯⋯，.⋯⋯，.........................⋯⋯ 1 4 定义 ············，·········································，························································⋯⋯ 1 5 额定值 ············································································································⋯⋯ 4 5.1 额定电压(UJ ··········································，·，·······································⋯⋯，..⋯⋯ 4 5. 2 额定绝缘水平 ··························，···········································⋯⋯，，........⋯⋯，...⋯⋯ 5 5. 3 额定频率(f,)···，············································，，·····················⋯⋯，.................⋯⋯ 5 5.4 额定电流(I,)和温升 ·····················································································⋯⋯ 5 5. 5 额定短时耐受电流UK) ··················································，··························，······⋯⋯5 5. 6额定峰值耐受电流(IP )··················································································⋯⋯ 5 5.7额定短路持续时间(OK )···，·························，·····························，·······················⋯⋯ 5 5.8 合闸和分闸操动机构以及辅助和控制回路的额定电源电压(Ue)································⋯⋯ 5 5. 9 合闸和分闸操动机构以及辅助回路的额定电源频率 ················································⋯⋯ 5 5. 10 操作和/或开断用的压缩气源的额定压力 ·······················，····································⋯⋯ 5 5. 101额定有功负载开断电流(I, )····························································⋯⋯“’“‘.““‘’‘5 5. 102额定闭环开断电流( 12。和Ian)············，，····，···············································⋯⋯”’“‘5 5. 103额定空载变压器开断电流(I, )········································································⋯⋯5 5. 104额定电缆充电开断电流(I?)···························································⋯⋯‘·‘·‘·‘二“””5 5. 105额定线路充电开断电流(Lb ) ....................····················································⋯⋯5 5. 106 特殊用途负荷开关的额定单个电容器组开断电流(人)···，······································⋯⋯ 5 5. 107 特殊用途负荷开关的额定背对背电容器组开断电流(几。)·······························，······⋯⋯ 5 5. 108 特殊用途负荷开关的额定背对背电容器组关合涌流(去n)····················，··················⋯⋯ 5 5. 109额定接地故障开断电流(Is?)········································································⋯⋯“6 5.110 接地故障条件下的额定电缆充电和线路充电开断电流(入b)···································，，·⋯ 6 5.111 特殊用途负荷开关的额定电动机开断电流(I)···················································⋯⋯ 6 5. 112 额定短路关合电流(I-) ....................................................................................... 6 5. 113 通用负荷开关的额定开断和关合电流 ······························································⋯⋯ 6 5. 114 专用负荷开关的额定值 ·····························，，··················································⋯⋯6 5. 115特殊用途负荷开关的额定值·，·················，············································⋯⋯‘’““““6 5. 116熔断器保护用负荷开关的额定值 ···························，，··················，·····················⋯⋯7 6 一般要求 ····，·················，·················································································⋯⋯ 7 7 设计 领导形象设计圆作业设计ao工艺污水处理厂设计附属工程施工组织设计清扫机器人结构设计 与结构 ·······································，，···········································，，················⋯⋯ 7 7. 1负荷开关中液体的要求 ··················································································⋯⋯ 7 7.2 负荷开关中气体的要求 ·······································，··················，···················，，····⋯⋯7 标准 excel标准偏差excel标准偏差函数exl标准差函数国标检验抽样标准表免费下载红头文件格式标准下载 下载网(www.bzxzw.com) GB3804- 2004 7. 3 负荷开关的接地 ·······························································.·····......................⋯⋯ 7 7.4 辅助和控制设备 ····················································································.......⋯⋯ 7 7. 5 动力操作 ······································································································⋯⋯ 8 7. 6 储能操作 ····································································································⋯⋯ 8 7. 7 不依赖人力的操作 ··········································································.........⋯⋯ 8 7.8 脱扣器操作 ··················································································...⋯⋯，.......⋯⋯ 8 7. 9低压和高压闭锁装置 ·······，···········································，··········，···········.......⋯⋯，..⋯8 7.10 铭牌··············································，···························································⋯⋯ 8 7. 11 联锁装置 ······································································································⋯⋯ 8 7. 12 位置指示············，··············································，··········································⋯⋯ 8 7. 13 外壳的防护等级·······························································⋯ ⋯，⋯，，...⋯⋯，.⋯，⋯⋯ 8 7. 14 爬电距离 ·····································································，······························⋯⋯ 8 7. 15 气体和真空的密封·····················································································...⋯⋯ 8 7. 16 液体的密封······································································.·.····.···..·······.····.··⋯ 8 7. 17 易燃 性········································································································⋯⋯ 8 7. 18 电磁兼容性(EMC) ···········································································⋯⋯，..⋯，⋯ 8 7. 101 关合和开断操作 ··································.···························......⋯⋯，.⋯，..⋯，...⋯⋯ 8 7.102隔离负荷开关的要求 ································································..................⋯⋯ 8 7. 103 机械强度 ···············，·················，·································································⋯⋯ 8 7. 104 安全位置 ········，······································································，··················⋯⋯ 9 7.105 信号用的辅助触头 ····················································，····，·····，···············，······⋯⋯ 9 8 型式试验 ··············，···································，·····················································，··⋯ 9 8. 1 概述 ··，·····················，·················································································⋯⋯ 9 8. 2 绝缘试验 ··········································，··························，···············，·················，⋯ 9 8.3 无线电干扰电压(RIV)试验·······························.......·.......................................⋯⋯ 10 8. 4 主回路电阻测量·············································································，·⋯，.........⋯⋯，10 8. 5 温升试 验······································，·····，·······················································⋯⋯ 10 8. 6 短时耐受电流和峰值耐受电流试验··········································，，·························，，·⋯ 10 8. 7 防护等级验证·······························································，····，···········，·········，·····一 10 8.8 密封试验···························，··········································································⋯⋯ 10 8. 9 电磁兼容性(EMC)试验 ······································⋯⋯，.⋯，............⋯⋯，.....⋯⋯，⋯⋯ 10 8. 101 关合和开断试验··························································⋯⋯，.，..⋯⋯，...........⋯⋯，.10 8. 102 机械操作试验 ···························································，······················，······....⋯⋯ 16 8. 103严重冰冻条件下的操作······································，········.·.···......................⋯⋯，⋯18 9 出厂试验 ···································································································，···一 18 10 负荷开关的选用导则 ·······················································································⋯⋯ 18 10. 1 概述 ·····································································································⋯⋯ 18 10. 2 影响使用的工况 ·································································⋯⋯，，..⋯，.⋯⋯ 18 10. 3 绝缘 配合 ·····························································································......⋯⋯ 19 10.4 负荷开关等级的选择 ·············································......................⋯⋯，..........⋯⋯ 19 11 随询问单、标书和订单提供的资料······························································，···········一 19 11. 101 随询问单和订单提供资料 ··········································································⋯⋯ 19 11. 102 随标书提供的资料 ·········，······························，·························..................⋯⋯ 19 日 标准下载网(www.bzxzw.com) CE 3804- 2004 ?? ??12 运输、储存、安装、运行和维护 规则 编码规则下载淘宝规则下载天猫规则下载麻将竞赛规则pdf麻将竞赛规则pdf 13 安 全性 图1 有功负载电流开合试验(试验方式1)的单相试验回路·············································⋯⋯ 27 图la 总体回路 ···································································································⋯⋯ 27 图lb 三角形连接的负载·················································..··.·········.........·............⋯⋯ 27 图lc 星形连接的负载 ··············································································....··.·····⋯⋯ 27 图2 有功负载电流开合试验(试验方式”的单相试验回路·············································⋯⋯ 28 图3 配电线路闭环和并联变压器电流开合试验(试验方式2a和2b)的三相试验回路············⋯⋯ 28 图4 配电线路闭环和并联变压器闭环电流开合试验(试验方式2a和2b)的单相试验回路······⋯⋯ 29 图5 短路关合电流试验(试验方式5)的三相试验回路···················································⋯⋯ 29 图6 短路关合电流试验(试验方式5)的单相试验回路···················································⋯⋯ 29 图7 单相电容器组电流开断试验的预期丁RV参数限值·..................................................... 30 图8 接地故障开断电流试验(试验方式6a)的三相试验回路 ··········································⋯⋯ 31 图9 接地故障条件下电缆充电开断电流试验(试验方式6b)的三相试验回路 ·····················⋯⋯ 31 表1 通用负荷开关的额定电缆和线路充电开断电流 ···················································⋯⋯ 21 表2 铭牌内容 ···································································································⋯⋯ 21 表3 有功负载电流开断试验电源回路的TRV参数······················································⋯⋯ 22 表4a 配电线路闭环开断试验的TRV参数 ·······························································⋯⋯ 23 表4b 并联电力变压器电流开断试验的TRV参数 ······················································⋯⋯ 23 表5 通用负荷开关的试验方式— 三极联动的、逐极操作的和单极负荷开关三相试验的试验 方式 ·········································································································⋯⋯ 24 表6 通用负荷开关的试验方式— 逐极操作的三极负荷开关和用于三相系统中的单极负荷 开关的单相试验 ·················。···························································......·····.·⋯⋯ 24 表7 特殊用途负荷开关的试验方式— 三极联动的、逐极操作的和单极负荷开关的三相试验⋯⋯ 25 表8 特殊用途负荷开关的试验方式— 逐极操作的三极负荷开关和用于三相系统中的单极 负荷开关的单相试验 ···············································································.....⋯⋯ 26 表9 单相电容器组电流开断试验的预期恢复电压参数值 ············································⋯⋯ 26 标准下载网(www.bzxzw.com) GB 3804- 2004 前 言 本标准的全部技术内容为强制性。 本标准是根据IEC 60265-1:1998(IEC 60265的第3版)《高压负荷开关 第1部分:额定电压1 kV 以上52 kV以下的负荷开关》对GB 3804-1990((3^-63 kV交流高压负荷开关》进行全面修订的。本标 准与IEC 60265-1:1998的一致性程度为修改采用。本标准的结构和编排与IEC 60265:1998基本一 致，技术内容与之等效。 本标准与IEC 60265:1998的主要差别体现在: — 适用范围，删去了IEC 60265-1:1998中额定频率60 Hz的有关内容;根据我国行业分工情况， 适用的系统额定电压从GB/T 11022规定中选取了3. 6 kV-7. 2 kV-12 kV-24 kV- 40.5 kV五个电压等级，删去了与我国电网无关的额定电压值; — 额定电压40. 5 k V一级电压，在IEC 60265-1:1998中是介于38 kV与48. 3 kV之间。对应 40. 5 kV级电压，本标准在表1中的额定开断电流值是按插人法确定的;而在表3、表4a、表4b 中的TRV参数是按IEC 60265-1:1998中相应表格提供的 计算公式 六西格玛计算公式下载结构力学静力计算公式下载重复性计算公式下载六西格玛计算公式下载年假计算公式 计算确定的; — 为了避免重复，本标准删去了IEC 60265-1:1998中3. 8"定义索引”; — 本标准内容与IEC 60265-1:1998不同之处均用“脚注，"i1A以说明。 本标准与GB 3804-199。的主要差别有: — 适用范围，GB 3804-1990额定电压为3 kV-63 kV，本标准额定电压为3. 6 kV-40.5 kV, 关于63 kV电压应靠标为72. 5 kV，属于IEC 60265-2范围。待对应国标GB/T 1480-1993 修订时考虑。 — 应用和给出的术语大大增加。例如:对通用负荷开关，根据开断频繁程度的要求将电寿命分为 E1级、E2级、E3级;机械寿命分为M1级、M2级等。 — 提供的额定值更加充实，规定具体。例如:额定电缆和线路充电开断电流，按不同电压等级列 人表 1; — 提供的各种电流试验电源的TRV参数更加充实和具体，例如:新增加的表3、表4a、表46、表9 等，并增加计算公式; — 详细规定了各种试验方法和程序、将GB 3804-199。中表7细化为表5、表6、表7和表8 等;规定了各种试验回路图，并给出了回路参数。例如:图la、图1b、图lc、图2、图3、图4, 图5、图6等。 — 本标准对GB/T 11022-1999中已有规定的内容直接加以引用而不再重复。对新增加的条款 从101开始编号。 本标准自实施之日起，同时代替GB 3804-1990, 本标准由中国电器工业协会提出。 本标准由全国高压开关设备标准化技术委员会归口。 本标准起草单位及成员: 负责单位:上海华通开关厂:曲培斌、谢根福、王妙发、谭锦权。 参加单位:西安高压电器研究所:刘莉; 西安高压开关厂:刘全都、敖列; 天水长城开关厂:刘成学、孙壮丽; 北京北开电气股份有限公司:齐希泰; V 标准下载网(www.bzxzw.com) GB 3804- 2004 正泰集团成套设备制造有限公司:高诚; 上海华银开关厂:彭跃明; 华仪电器集团公司:金建华; 宁波天安集团股份有限公司:冯保民; 重庆高压开关厂:郑立; 福州第一开关厂:黄炳文; 陕西宝光真空电器股份有限公司:高翔。 本标准主要起草人:曲培斌、谢根福。 本标准代替标准的历次版本发布情况为: — GB 3804- 1983; — GB 3804- 19900 GB3804- 2004 3. 6 kV-40. 5 kV高压交流负荷开关 范围 本标准适用于额定电压3.6 kV-40.5 kV,频率为50 Hz，安装于户内或户外且具有关合和开断电 流额定值的三极交流负荷开关和隔离负荷开关。 本标准也适用于这些负荷开关的操动机构及其辅助设备。 隔离负荷开关也应满足GB 1985的相关规定。 本标准中的一般原则和规定也适用于单相系统中的单极负荷开关。绝缘试验以及关合和开断试验 的要求应满足规定使用场合的要求。 注 1:除非有特别说明，术语“负荷开关”就代表了本标准范围内所有类型的负荷开关和隔离负荷开关. 注2:接地开关并未包含在本标准范围内。对作为负荷开关组成部分的接地开关的要求包含在 GB 1985中。 注3:本标准不适用于通过分、合熔断器来操作、并作为高压熔断器附件的负荷开关。 规范性 引用文件 下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件，其随后所有 的修改单(不包括勘误的内容)或修订版均不适用于本标准，然而，鼓励根据本标准达成 协议 离婚协议模板下载合伙人协议 下载渠道分销协议免费下载敬业协议下载授课协议下载 的各方研究 是否可使用这些文件的最新版本。凡是不注日期的引用文件，其最新版本适用于本标准。 GB 311. 1-1997 高压输变电设备的绝缘配合(neq IEC 60071-1:1993) GB/T 762-1996 标准电流(eqv IEC 60059:1938) GB/T 1984-2003 高压交流断路器(IEC 62271-100:2001,MOD) GB/T 1985-2004 高压交流隔离开关和接地开关(IEC 62271-102:2002,MOD) GB/T 2900.20-1994 电工术语 高压开关设备(neq IEC 60050) GB/T 11022-1999 高压开关设备和控制设备标准的共用技术要求(eqv IEC 60694:1996) GB 16926-1997 交流高压负荷开关— 熔断器组合电器(eqv IEC 60420:1990) IEC 61233:1994 高压交流断路器— 感性负载开合 正常和特殊使用条件 正常使用条件 按GB/T 11022-1999 特殊使用条件 按 GB/T 11022-1999 中2.1的规定。 中2.2的规定。 定义 本标准采用了GB/T 11022-1999中第3章的一些定义，为了便于使用，把其中一部分摘录如下。 通用术语 general terms 无特别 的定义 。 4.2 成葱设备 assemblies 无特别的定义 。 GB 3804- 2004 4.3 成套设备的各个部分 parts of assemblies 无特别的定义。 4.4 开关装皿 switching devices 4.4. 101 负荷开关switch 能够在回路正常条件(也可包括规定的过载条件)下关合、承载和开断电流以及在规定的异常回路 条件(如短路)下，在规定的时间内承载电流的开关装置。 4.4. 102 隔离负荷开关 switch disconnector 在断开位置，能满足对隔离开关所规定的隔离要求的一种负荷开关。 4.4. 103 通用负荷开关 general purpose switch 能够在配电系统中对正常出现的直到其额定开断电流进行关合和开断操作，并能承载和关合短路 电流的负荷开关。 4.4. 103. 1 El级通用负荷开关 class El general purpose switch 适用于配电系统的正常连续馈电，且不需要进行频繁开合操作的通用负荷开关。 4.4. 103.2 E2级通用负荷开关 class E2 general purpose switch 不需要对主回路的开断部件检查或维护，且在预期的使用寿命期间，其他零件仅需要很少维护的通 用负荷开关。 注:很少维护可能包括润滑、更换气体和清洁外表面(适用时). 4.4. 103.3 E3级通用负荷开关 class E3 general purpose switch 具有频繁开合较大电流和较高频率关合短路能力的通用负荷开关。 4.4. 103.4 M1级通用负荷开关 class Ml general purpose switch 具有1 000次(操作)机械寿命的通用负荷开关。 4.4. 103.5 M2级通用负荷开关 class M2 general purpose switch 具有5 000次延长的机械寿命的特殊使用场合的通用负荷开关。 注:特殊用途负荷开关和专用负荷开关也可按 M2级分类。 4.4. 104 专用负荷开关 limited purpose switch 具有额定电流、额定短时耐受电流以及通用负荷开关的一种或几种开合能力的负荷开关。 4.4. 105 特殊用途负荷开关 special purpose switch 具有额定电流、额定短时耐受电流、额定短路关合电流以及能够在特殊使用场合下能够特殊运行的 负荷开关 。 注 1:这种特殊要求的例子如开合电容器组、开合电动机及开合并联电力变压器. 注2:在某些使用场合，当采用了其他装置关合短路，不使负荷开关关合短路时，不要求短路关合能力，用户应做出 GB 3804- 2004 相应的规定。 4.4. 105. 1 单个电容器组负荷开关 single capacitor bank switch 用于开合充电电流的特殊负荷开关。其开合的充电电流值应小于或等于额定单个电容器组开断 电流 。 4.4. 105.2 背对背电容器组负荷开关 back-to-back capacitor bank switch 用于开断负荷开关的电源侧接有一个或多个电容器组，且电容器组充电电流值小于或等于额定背 对背电容器组开断电流的特殊用途负荷开关。这种负荷开关应能关合小于或等于其额定电容器组关合 涌流的所有电流值。 4.4. 105.3 电动机负荷开关 motor switch 用于在稳态和故障条件下开合电动机的特殊用途负荷开关。 4.4. 105.4 并联电力变压器闭环负荷开关 parallel power transformer closed-loop switch 用于开合大容量电力变压器并联闭环回路的特殊用途负荷开关。这种负荷开关的典型是用作变压 器二次侧电路的中压联络负荷开关，在这种情况下开断电流较大，且瞬态恢复电压(TRV)条件苛刻。 4.5 开关装It的部件 parts of switching devices 无特殊定义。 4.6 操作 operation 没有特别定义。 4.7 特性参数 characteristic quantities 4.7. 101 开断能力 breaking capacity 在规定的使用与性能条件下以及在指定电压下，开关装置或熔断器能够开断的预期电流值。 注:规定条件和指定电压均在有关出版物中指出。 4.7. 102 有功负载开断能力 .inly active load-breaking capacity 开断有功负载回路，该回路功率因数至少为。75，其负载可用电阻和电抗并联表示。 4.7. 103 空载变压器开断能力 no-load transformer breaking capacity 开断空载变压器回路的能力。 4.7. 104 闭环开断能j7 closed-loop breaking capacity 开断闭环配电线路，或开断两个并联电力变压器或多个并联电力变压器的能力。即负荷开关开断 后，其两侧均带电，且其端子间的电压基本上小于系统电压。 4.7. 105 电缆充电电流开断能力 cable-charging breaking capacity 开断电缆空载回路的能力。 3 GB 3804- 2004 4.7. 106 线路充电电流开断能fl line-charging breaking capacity 开断空载架空线路的能力。 4.7. 107 单个电容器组开断能J) single capacitorbankbreakingcapacity 开断接在电源上的单个电容器组回路(此时没有其他电容器组与被开合的电容器组邻近)的能力。 4.7. 108 背对背电容器组开断能力 back-to-back capacitor bank breaking capacity 开断接在电源上的电容器组回路(此时有一个或多个电容器组与被开合的电容器组邻近时)的 能力 。 4.7. 109 背对背电容器组关合涌流 back-to-back capacitor bank inrush making current 把一个电容器组投到电源上，这时由于有一个或多个电容器组与被投人的电容器组邻近，因而出现 的高频和高幅值的电流。 注:涌流的颇率和幅值取决于电容器组之间的电容和电感的数值。 4.7. 110 电动机开断能力 motor breaking capacity 开断稳态和失速条件下电动机的能力。 4.7. 111 接地故障开断能t earth fault breaking capacity 在中性点绝缘或谐振接地系统中，负荷开关的负载侧的空载电缆或架空线存在接地故障时开断故 障相的能力。 4.7. 112 接地故阵条件下的电缆充电电流和线路充电电流开断能力 cable-and line-charging breaking ca- pacity under earth fault conditions 在中性点绝缘或谐振接地系统中，在负荷开关的电源侧发生接地故障时切除空载电缆或架空线路 健全相的开断能力。 4.7. 113 开断电流 breaking current 在开断过程中产生电弧瞬间流过开关装置的一极或流过熔断器的电流。 4.7. 114 (峰值)关合电流 (peak) making current 在关合操作过程中，电流出现后的瞬态阶段负荷开关一极中电流的第一个半波的峰值。 注 1:一极与另一极以及一次操作与另一次操作的峰值不同，因为它取决于电流出现瞬间所对应的外施电压的 波形 。 注2:对于三相回路，除非另有规定，(峰值)关合电流的数值是指所有相中的最高值. 4.7. 115 短路关合能j7 short-circuit making capacity 在规定条件下，包括开关装置的接线端子短路在内的接通能力。 5 额定值 按GB/T 11022-1999第4章的规定，并作如下补充: 5. 1 额定电压 (U,) 额定电压标准值为:3.6 W -7.2 kV-12 kV-24 kV-40.5 kV GB 3804- 2004 5.2 额定绝缘水平 按GB/T 11022-1999中4.2的规定。 5.3 额定频率(了.) 按GB/T 11022-1999中4.3的规定。 5.4 额定电流(11)和温升 按GB/T 11022-1999中4.4的规定。 5.5 额定短时耐受电流(1K) 按GB/T 11022-1999中4. 5的规定并作如下补充: 除非用户和制造厂之间另有协议，否则作为负荷开关不可分割部分的接地开关的额定短时耐受电 流应该等于负荷开关的额定短时耐受电流。 5.6 额定峰值耐受电流(吞) 按GB/T 11022-1999中4.6的规定。 5.7 额定短路持续时间(t.) 按GB/T 11022-1999中4. 7的规定。 5.8 合闸和分闸操动机构以及辅助和控制回路的额定电源电压(U,) 按GB/T 11022-1999中4.8的规定。 5.9 合闸和分闸操动机构以及辅助回路的额定电源频率 按GB/T 11022-1999中4.9的规定。 5. 10 操作和/或开断用的压缩气源的额定压力 按GB/T 11022-1999中4.10的规定。 5. 101 额定有功负载开断电流(1,) 额定有功负载开断电流是负荷开关在其额定电压下能够开断的最大有功负载电流。 5. 102 额定闭环开断电流(几.和几。) 额定闭环开断电流是负荷开关能够开断的最大闭环电流，可以分别规定配电线路闭环开断电流和 并联电力变压器闭环开断电流额定值。 5. 103 额定空载变压器开断电流(1, ) 额定空载变压器开断电流是负荷开关在其额定电压下能够开断的最大空载变压器电流。 5. 104 额定电缆充电开断电流(14a ) 额定电缆充电开断电流是负荷开关在其额定电压下能够开断的最大电缆充电电流。 5. 105 额定线路充 电开断电流(1m) 额定线路充电开断电流是负荷开关在其额定电压下能够开断的最大线路充电电流。 5. 106 特殊用途负荷开关的额定单个电容器组开断电流(I4a ) 额定单个电容器组开断电流，是特殊用途负荷开关在其额定电压下，且没有其他与被开合的电容器 组邻近的电容器组接在负荷开关的电源侧时，能够开断的最大电容器组电流 5. 107 特殊用途负荷开关的额定背对背电容器组开断电流(14.) 额定背对背电容器组开断电流，是特殊用途负荷开关在其额定电压下且有一个或多个与被开合的 电容器组邻近的电容器组接在负荷开关的电源侧时，能够开断的最大电容器组电流。 5. 108 特殊用途负荷开关的额定背对背电容器组关合涌流(几) 额定背对背电容器组关合涌流，是特殊用途负荷开关在其额定电压下且涌流频率与使用条件一致 时，能够关合的电流峰值。 对于具有额定背对背电容器组开断电流的负荷开关，额定背对背电容器组关合涌流的规定是强制 性 的。 注:背对背电容器组关合涌流的频率在 2 kHz-30 kHz的范围内，规定值取决于被开合的电容器组、电源侧的电容 GB 3804- 2004 器组以及限流阻抗(如果有的话)的数值和结构。 不必对负荷开关因背对背电容器组产生的关合涌流规定额定开断值。 5. 109 额定接地故障开断电流(16.) 对于中性点绝缘或谐振接地系统，额定接地故障开断电流是负荷开关在其额定电压下能够开断的 故障相的最大接地故障电流。 注:即使在去掉谐振的情况下，中性点绝缘系统的TRV也要比谐振接地系统的TRV严酷，因此，为了进行试验，假 定为中性点绝缘系统 5. 110 接地故障条件下的额定电缆充电和线路充电开断电流(几。) 对于中性点绝缘或谐振接地系统，接地故障条件下的额定电缆充电和线路充电开断电流是负荷开 关在其额定电压下能够开断的健全相中的最大电流。 注:接地故障条件下的额定电缆充电和线路充电电流是正常条件下的电缆充电和线路充电电流的万 倍。这覆盖了 单屏蔽电缆时出现的最严酷情况。 5. 111 特殊用途负荷开关的额定电动机开断电流(( 77 ) 额定电动机开断电流是负荷开关在其额定电压下能够开断电动机的最大稳态电流。参见 IEC 61233" 除非另有规定，故障条件下的电动机开断电流是电动机额定电流的8倍。