ICS 17.220 CCS L 98 湖 43 南 省 地 方 标 准 DB43/T 2357—2022 宽负载电流互感器通用技术规范 Technical specification for wide load current transformers 2022 - 05 - 06 发布 2022 - 08 - 06 实施 湖南省市场监督管理局 发 布 DB43/T 2357—2022 目 次 前言························································································································ Ⅲ 1 范围 ····················································································································· 1 2 规范性引用文件 ······································································································ 1 3 术语与定义 ············································································································ 1 4 技术要求 ··············································································································· 1 4.1 额定绝缘水平 ··································································································· 1 4.2 额定输出 ········································································································· 2 4.3 额定准确级 ······································································································ 2 4.4 额定一次电流标准值 ·························································································· 3 4.5 额定二次电流标准值 ·························································································· 3 4.6 额定连续热电流标准值 ······················································································· 3 4.7 短时电流额定值 ································································································ 3 4.8 设计和结构 ······································································································ 3 5 试验方法 ··············································································································· 3 5.1 一次端工频耐压试验 ·························································································· 3 5.2 二次端工频耐压试验 ·························································································· 4 5.3 准确度试验 ······································································································ 4 5.4 温升试验 ········································································································· 4 5.5 短时电流试验 ··································································································· 4 5.6 一次端冲击耐压试验 ·························································································· 4 5.7 局部放电试验 ··································································································· 4 5.8 匝间过电压试验 ································································································ 4 6 检验规则 ··············································································································· 5 6.1 出厂检验 ········································································································· 5 6.2 型式检验 ········································································································· 5 附录 A（规范性） 试验项目 ························································································· 6 I DB43/T 2357—2022 II DB43/T 2357—2022 前 言 本文件按照 GB/T 1.1—2020《标准化工作导则 第 1 部分：标准化文件的结构和起草规则》的规 定起草。 请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别专利的责任。 本文件由湖南省市场监督管理局提出并归口。 本文件起草单位：湖南省计量检测研究院、长沙久信电力科技股份有限公司、国网湖南省电力有限 公司供电服务中心（计量中心） 、怀化建南机器厂有限公司、中南大学、国网长沙供电公司客户服务中 心（计量中心） 、国网湖南省电力有限公司邵阳供电分公司客户服务中心（计量中心）、国网张家界供电 公司、国网怀化供电公司、中铁检验认证株洲牵引电气设备检验站有限公司 本文件主要起草人：曾强、宋文涛、谢小军、张泽虎、李恺、王海元、唐海富、罗瑞琼、何源、谭 娟、周卫、蒋海洲、王兵初、向建安、张随涵、刘鼎、 胡夏颖、罗颖、张鹤祥、朱舟、李思颖、宋慧 琦。 III DB43/T 2357—2022 IV DB43/T 2357—2022 宽负载电流互感器通用技术规范 1 范围 本文件规定了供电气测量仪表使用、频率为 15 Hz〜100 Hz 的新制造的电磁式宽负载电流互感器的 术语和定义、技术要求、试验方法和检验规则。 本文件适应于测量用电磁式宽负载电流互感器的出厂检验及型式检验。 2 规范性引用文件 下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中，注日期的引用文件， 仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本（包括所有的修改单）适用于本 文件。 GB/T 156 标准电压（GB/T 156—2007，IEC 60038：2002，MOD） GB 311.1 绝缘配合 第 1 部分：定义、原则和规则（GB 311.1—2012，IEC 60071-1：2006，MOD） GB 20840.1—2010 互感器 第 1 部分:通用技术要求（IEC 61869-1：2007，MOD） GB 20840.2—2014 互感器 第 2 部分:电流互感器的补充技术要求 3 术语与定义 GB 20840.2—2014 中界定的以及下列增补的术语和定义适用于本文件。 宽负载电流互感器 wild load current transformer 宽负载电流互感器是指含有两个绕组的 CT，可以根据负载的实际情况自动识别适合运行的变比， 保证电流互感器的计量范围从变压器负载的 0.2％〜150％均能满足相应准确度要求的测量用电流互感 器。 4 技术要求 4.1 额定绝缘水平 4.1.1 一次端额定绝缘水平 对于标称系统电压 Un≤1000 kV 的电流互感器的一次端额定绝缘水平应以 GB 20840.1—2010 表 2 所列的设备最高电压 Um（或 Un）为依据。运行时拟接地一次端子的绝缘水平按 Un 为 0.66 kV 选取。 对于无一次绕组和本身无一次绝缘且标称系统电压 Un≤0.66 kV 的电流互感