导线载流量.doc

表9-24 聚氯乙烯绝缘电线穿钢管敷设的载流量（n=70） 截 面 （mm2） 2根单芯（A） 管径（mm）3根单芯（A）管径（mm） 4根单芯（A） 管径（mm）支 线干 线支 线干 线支 线干 线25303540GDGGDG25303540GDGGDG25303540GDGGDGBV型铜芯 1151413121516141312111516121110915161.52019181715161817161515161716151415162.52826242315162524232115162322211915194373533301519333129271519302826242025650474441202543413936202539373532202510696561572025253260575450253225325350474425323238168782777125323238777369642532323869656157323832(51)251131071019332383238101958983323832(51)9085807432(51)50(51)35141133125116323840(51)12211510810032(51)40(51)111105999150(51)50(51)5017516515514440(51)50(51)15514613712740(51)50(51)13813012211350(51)657021720519317850(51)5019418317215950(51)651751651551446565952652502352185065239225212196656521220018817465651203072902732526565276260244226656524423021620065801503503303102876565318300282261658028126524923180100185403380357331653603403202968080318300282261100100注 同表9-21表下注2、3、4。绝缘导线载流量估算口决 二点五下乘以九，往上减一顺号走。三十五乘三点五，双双成组减点五。条件有变加折算，高温九折铜升级。穿管根数二三四，八七六折满载流。说明： ( . 如25mm导线，载流量为259225(A)。从4mm及以上导线的载 . 高于25的地区，导线载流量可按上述口诀 .型 号BX额定电压（KV）0.45/0.75导体工作温度（C）65环境温度（C）303540303540导线排列O-S-O-S-O导线根数245891212 以上245891212 以上245891212 以上标称截面（mm 2）导线穿管敷设载流量（A）1.52422201398712976118762.531282617131110161210915119844138352317141321161312201512116534945292218162821171525191614107368624332272440302522372723201698908358443633534033304937312825130120110806050457355464068514238351651531409974625691685751846352475020118517012292766911284706310478655870254234215155116978714410890811329982749531328926519814912411119314412010816812610594120366338310231173144130213160133120196147122110150419387355269201168151248186155139228171142128185484447410311233194175287215179161264198165148240584540495373279233209344258215193316237197177注：明敷载流量值系根据S2De(De-电线外径)计算型 号BV额定电压（KV）0.45/0.75导体工作温度（C）70环境温度（C）303540303540导线排列O-S-O-S-O导线根数245891212 以上245891212 以上245891212 以上标称截面（mm 2）明敷载流量（A）导线穿管敷设载流量（A）1.52322201398712976118762.53129271713111016121091511984413936241815132217141221151311653504631231917292118162020161510746964443328254131262338292421169993866045383457423532523932292513212411583625247775748437053443935161151140103776458967260548866554950201189175127957971117887366108816760702592432251651231039215211495851401058778953162972752071551291161921441201081761321109912037435132524518415313822617014112720815613011715042640037028821618016226519916614924418315213718549546443033525120918830923219317428421317715924059255651539629724722236627522926336252210189注：明敷载流量值系根据S2De(De-电线外径)计算表9-43 2-3片组合涂漆母线的载流量（n=70 a=25 ） 母线尺寸（宽X厚，mm） 铝（A） 铜（A） 交流 直流 交流 直流 2片 3片 2片 3片 2片 3片 2片 3片 40X4 855 1090 40X5 965 1250 50X5 1180 152550X6.3 1315 1700 63X6.3 1350 1720 1555 1940 1740 2240 1990 2495 80X6.3 1630 2100 2055 2460 2110 2720 2630 3220 100X6.3 1935 2500 2515 3040 2470 3170 3245 3940 63X8 1680 2180 1840 2330 2160 2790 2485 3020 80X8 2040 2620 2400 2975 2620 3370 3095 3850 100X8 2390 3050 2945 3620 3060 3930 3810 4690 125X8 2650 3380 3350 4250 3400 4340 4400 560063X10 2010 2650 2110 2720 2560 3300 2725 3530 80X10 2410 3100 2735 3440 3100 3990 3510 4450 100X10 2860 3650 3350 4160 3610 4650 4325 5385 125X10 3200 4100 3900 4860 4100 5200 5000 6250 注 本表系母线立放的数据，母线间距等于厚度。不同环境温度下载流量修正系数导体工作温度（C）环境温度 （C）（空气中）101520253035404550501.701.621.521.421.321.221.000.75-601.581.501.411.321.221.111.000.860.73651.481.411.341.261.181.091.000.890.77701.411.351.291.221.151.081.000.910.81801.321.271.221.171.111.061.000.930.86901.261.221.181.141.091.041.000.940.89不同环境温度下载流量修正系数导体工作温度（C）环境温度 （C）（土壤中）101520253035501.261.181.101.000.890.77601.201.131.071.000.930.85651.171.121.061.000.940.88701.151.111.051.000.940.88801.131.091.041.000.950.90901.111.071.041.000.960.92电缆在空气中并列敷设时载流量修正系数根数载 流 量 修 正 系 数1236468912S=1d1.000.900.850.800.820.80-S=2d1.000.980.900.950.900.850.800.80S=3d1.001.000.980.980.980.900.850.85不同土壤热阻系数的载流量修正系数电压（KV）截面范围（mm2）土壤热阻系数 T =( C- M/W )0.81.01.21.51.82.0.53.0135及以下50120150300400及以上1.061.000.950.890.840.810.750.711.081.000.940.870.800.770.700.651.081.000.930.860.790.760.690.641.091.000.930.850.790.760.680.631035及以下50120150300400及以上1.051.000.950.900.840.820.760.701.061.000.940.880.820.800.730.681.071.000.940.870.810.780.710.661.071.000.930.870.810.770.710.65电线电缆穿管敷设于空气中载流量修正系数（参考值）穿管根数修正系数240.80580.609120.5012以上0.45注：1、穿管电缆根数系指有负荷且发热的导线根数。中性线或保护线可不计。 2、一般情况下，穿管根数体积占管内体积的40%左右。 3、当管子并列敷设时乘以0.95的修正系数。三芯或三个单芯电缆平行成组直埋于土壤中载流量修正系数（参考值）电缆间距组数23456相互接触 70100(mm)220250(mm)0.790.6690.630.580.550.850.750.680.640.600.870.970.750.720.69电缆在桥架上无间距配置多层并列时持续载流量的校正系数 叠置电缆层数 水平排列1234梯 架0.800.660.550.50托 盘0.700.550.500.45不同埋地深度时载流量修正系数电压（KV）深度L（mm）修 正 系