DL 475-1992 接地装置工频特性参数的测量导则

DL475921992-11-031993-04-01122.12.22.3()2.433.13.1.11PCdGCGPUGIUGIRUGGI=(1)3.1.22GPCCPGdGC=(45)DdGP=(0.50.6)dGCDPdGC5%PG5%1GPCD2(a)(b)GPC&EAVDUGI(1)RG10kmdGC(45)DdGC2DdGPDdGC3DdGP1.7D3RUIaDDDDDDGGPGCGPGP2GC2GPGC=−+−+−11112cosθ(2)UGPIaDGPDGCdGPdGC=2D300.53.1.3D()44GCPSSdGS=30100m3GPCD4GPCSE&233442U23U34U42U23U34U42I()23422324223G21UUUIUR−+=(3)3.1.41.0100k1%(50V)3.1.53.1.5.1()()[]RIUUUGGGG02=′+′′−11222(4)I′UG′′UGUG0I()RIUUUUGGA2GBGCG02=++−11322(5)UGAUGBUGCABCUG0I3.1.5.21003.1.5.33.1.5.430A103.1.5.53.1.5.63.23.2.10.8m()1.8m(5)0.8m5ERRRUjmpmj=+2(6)ERRRUkmpmk=+2(7)URERRjmjmp=+2(8)URERRkmkmp=+2(9)EjEkUjUkRpRm15003.2.25SV1V2PRmGC50.1m0.125m0.25m15kgRm(100k)V1V2IV1V2Rm(1500)V1V2ImaxUUIIjmaxjmax=(10)UUIIkmaxkmax=(11)IUjUk6(a)(b)GPCMl46PCdGP=2.5ldGC=4ll55.1(7)Rρπ=24hhdln(12)d1.5cm1m7dh8C1C2P1P2Mha5.28ah20a20hR=2aR(13)1.5cm2525440cmaaaa=f(a)51015203040mamax5.35.3.1()5.3.2____________________________