《注册电气工程师JDL_T621—2016 交流电气装置的接地规范》.pdf

GroundingforACedectricalinsfallations DL/T6211997 DL/T6211997 GroundingforACelectricalinstallations 1997-09-02 1998-01-01 1979 1 SDJ879 1984 3 SD11984 500kV 1) 2)366kV 3) 4) 5) 6)(GIS) 7)IEC SDJ879 SD11984 500kV A B CD E F 1 500kV ( A ) (B ) 2 027 2.1grounded 2.2workinggroundSystemground ( ) 2.3protectiveground 2.4lightningprotectiveground () 2.5staticprotectiveground 2.6groundingelectrode () 2.7groundingconductor 2.8groundingconnection 2.9groundinggrid 2.10concentratedgroundingconnection 35 35 2.11groundresistance 2.12potentialofgroundingconnection 2.13touchpotentialdifference () 0.8m 1.8m 2.14steppotentialdifference () 0.8m 0.8m 027 2.15divertingpotential () 2.16exposedconductivepart 2.17extraneousconductivepart 2.18neutralconductor 2.19protectiveconductor a) b) c) d) e) 2.20PENconductor 2.2 1equipotentialbonding 2.22equiptentialboundingconductor 3A 3.1 4 a)() b) c) d) 3.2 3.3 A 3.4 a)110kV 635kV 174 +0.17ρf U t t (1) 027 174 0.17