dlt474.2-2005 现场绝缘试验实施导则 直流高电压试验

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1、ICS29.080K04备案号:17673-200613L中华人民共和国电力行业标准DL/T474.2一2006代替DL474.2一1992现场绝缘试验实施导则直流高电压试验GuideforinsulationtestonsiteDChighvoltagetest2006-05-06发布2006-10-01实施中华人民共和国国家发展和改革委员会发布DL/T474.2一2006目次前言············································，····················

2、·······························································································⋯⋯141范围·····，·······························································································································。····················⋯⋯

3、巧2规范性引用文件·································...............·······..............................................................................⋯⋯巧3直流高电压的产生···························....⋯⋯，....··.···............................................................

4、......................⋯⋯巧4直流高电压试验的接线·..............................................................................................................................185直流高电压的测量·...................................................................................

5、...................................................196直流泄漏电流的测量···············。·························································.........................................⋯⋯，.....⋯⋯197直流高电压试验·............................................................

6、..............................................................................19DL/T474.2一2006月Ii吕本标准是根据《国家发展和改革委办公厅关于印发2005年行业标准项目计划的通知》(发改办工业[2005]739号文)的安排，对DL474.2-1992进行的修订。本标准和原标准相比主要变化如下:—将原标准中对直流高电压测量准确度的要求由测量误差改为容许偏差，与GB/T16927.1-2高电压试验技术相一致;—增加了直流成

7、套装置校验的内容，包括电压电流特性、稳定度和校验周期;—微安表的接线改为更适合现场试验的接线图;—对原标准中的高压保护电阻器绝缘强度作了新规定，以适应于不同形式的保护电阻;—将原标准中“脉动因数”规范为“纹波因数”;将原标准中“脉动电压”规范为“纹波”，与GB/T2900.19电工术语高电压试验技术和绝缘配合相一致。本标准实施后代替DL474.2-1992.本标准由中国电力企业联合会提出。本标准由电力行业高电压试验技术标准化委员会归口并负责解释。本标准起草单位:湖北省电力试验研究院、武汉大学、华北电力科学研究院

8、有限责任公司。本标准主要起草人:张致、关根志、邓春。本标准1992年11月3日首次发布，本次为第一次修订。DL/T474.2一2006现场绝缘试验实施导则直流高电压试验飞范围本标准提出了现场直流高电压绝缘试验所涉及的试验电压的产生、试验接线、主要元件的选择和试验方法等一些技术细则和注意事项，贯彻执行有关国家标准和DL/T5%的相应规定。本标准适用于在变电所、发电厂现场和在修理车间、试验