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交流电气装置的接地电阻规范要求

  JIAOLIUDIANQIZHUANGZHIDEJIEDIDIANZUYINGFUHEXIALIEGUIDING:

  DANGPEIDIANBIANYAQIGAOYACEGONGZUOYUXIAODIANZUJIEDIXITONGSHI,BAOHUJIEDIWANGDEJIEDIDIANZUYINGFUHEXIASHIYAOQIU:

  R≤2000/I(12.4.1-1)

  SHIZHONGR—KAOLVDAOJIJIEBIANHUADEZUIDAJIEDIDIANZU(Q);

  I―JISUANYONGDELIUJINGJIEDIWANGDERENDIDUANLUDIANLIU(A)。

  DANGPEIDIANBIANYAQIGAOYACEGONGZUOYUBUJIEDIXITONGSHI,DIANQIZHUANGZHIDEJIEDIDIANZUYINGFUHEXIALIEYAOQIU:

  1)GAOYAYUDIYADIANQIZHUANGZHIGONGYONGDEJIEDIWANGDEJIEDIDIANZUYINGFUHEXIASHIYAOQIU,QIEBUYICHAOGUO4Ω:R≤120/I(12.4.1-2)

接地电阻测试仪

  2)JINYONGYUGAOYADIANQIZHUANGZHIDEJIEDIWANGDEJIEDIDIANZUYINGFUHEXIASHIYAOQIU,QIEBUYICHAOGUO100,:R≤250/I(12.4.1-3)

  SHIZHONGR—KAOLVDAOJIJIEBIANHUADEZUIDAJIEDIDIANZU(Ω);

  IYIJISUANYONGDEJIEDIGUZHANGDIANLIU(A)。

  ZAIZHONGXINGDIANJINGXIAOHUXIANQUANJIEDIDEDIANLIWANGZHONG,DANGJIEDIWANGDEJIEDIDIANZUANBENGUIFANGONGSHI<12.4.1YI2)、(12.4.1YI3)JISUANSHI,JIEDIGUZHANGDIANLIUYINGANXIALIEGUIDINGQUZHI:

  1)DUIZHUANGYOUXIAOHUXIANQUANDEBIANDIANSUOHUODIANQIZHUANGZHIDEJIEDIWANG,QIJISUANDIANLIUYINGWEIJIEZAITONGYIJIEDIWANGZHONGTONGYIDIANLIWANGGEXIAOHUXIANQUANEDINGDIANLIUZONGHEDE1.25BEI;2)DUIBUZHUANGXIAOHUXIANQUANDEBIANDIANSUOHUODIANQIZHUANGZHI,JISUANDIANLIUYINGWEIDIANLIWANGZHONGDUANKAIZUIDAYITAIXIAOHUXIANQUANSHIZUIDAKENENGCANYUDIANLIU,BINGBUDEXIAOYU30A。

  在高土壤电阻率地区,当接地网的接地电阻达到上述规定值,技术经济不合理时,电气装置的接地电阻可提高到30Ω,变电所接地网的接地电阻可提高到15Ω,但应符合本规范接地电阻测试仪测试的要求。

  DIYAXITONGZHONG,PEIDIANBIANYAQIZHONGXINGDIANDEJIEDIDIANZUBUYICHAOGUO4Ω。GAOTURANGDIANZULVDIQU,DANGDADAOSHANGSHUJIEDIDIANZUZHIKUNNANSHI,KECAIYONGWANGGESHIJIEDIWANG,DANYINGMANZUBENGUIFANJIEDIDIANZUCESHIYICESHIDEYAOQIU。


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