耐火電纜載流量及外徑

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1、2—4NHB—KVV22???NHA—KVV22???0.6/1kV電纜芯數(shù)標稱截面mm2電纜計算外徑mm導體直流電阻+20℃不大于Ω/km試驗電壓A.CkV.5min絕緣電阻+20℃不小于MΩ.km電纜計算重量kg/km71012141.521.025.726.427.612.13.511.0608830894993192427303730.336.437.138.541.312201883199121552550457102.519.621.022.527.57.413.59.315266117259951214192428.329.632.739.3108312091

2、517228927303735.641.344.9243026183091457421.923.625.34.613.59.266478193810121431.433.635.3101817631967457623.225.127.03.083.57.88779925112810121435.136.138.0194021172380457101025.527.630.039.01.833.56.51010120915162539載流量?????????????????NHB—VV???NHA—VV0.6/1kV??????????NHB—VV22??NHA—VV22敷設

3、條件標稱截面mm2空氣敷設單芯二芯三芯四芯1.52.54625334456233141522127364634421016253577101133163729512315062831071315876100122507095120198250308357181229270322159199243281148187228265150185240300411474564652367420320366429489300344環(huán)境溫度30℃工作溫度70℃結構尺寸及電氣性能多根電纜敷設載流量修正系數(shù)（1-12根）電纜根數(shù)1324686912?n（行）12?m（列）??????????

4、排列形式S?????????????S=dS=2dS=3d1.000.850.951.000.800.951.000.700.900.950.700.900.950.600.900.95--0.850.90--0.800.85--0.80?0.85多根電纜敷設載流量修正系數(shù)（上表以外排列形式）n123Sm7-2045678-203456789-1011-1213-1516-1920S=d0.700.600.560.530.510.500.480.410.370.340.320.310.300.300.300.300.30S=2d0.80—0.730.720.710.70——

5、0.680.660.650.310.640.630.620.610.60?環(huán)境溫度修正系數(shù)工作溫度℃環(huán)境溫度℃15202530354045701.171.121.0610.940.870.77