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)
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。
- 上一篇: 蓄电池内阻测试仪行业应用范围
- 下一篇: 大电流发生器的系统组成及工作原理