船舶低压电力系统电线电缆的参考载流量

船舶低压电力系统电线电缆的参考载流量船舶低压电力系统电线电缆的参考载流量本载流量摘自 GB/T13029《船用电缆的选择和敷设》中第一部分《船舶低压电力系统电缆的选择和敷设》。．船舶电气设备用阻燃电线载流量：型号：CBV-ZR、CBV-90-ZR、CBV-ZRC、CBV-90-ZRC、CBVR-ZR、CBVR-90-ZR、CBVR-ZRC、CBVR-90-ZRC、表1导体长期允许工作温度60℃PVC（一般）绝缘电缆载流量（环境温度45℃）芯数123或4芯数123或4标称截面mm2载流量A标称截面mm2载流量A18765010589741.51210870135115952.5171412951651401164221915120190162133629252015022018715410403428185250213175165446382402902472032571605030033528523435877461表2导体长期允许工作温度70℃PVC（一般）绝缘电缆载流量（环境温度45℃）芯数123或4芯数123或4标称截面mm载流量A标称截面mm2载流量A21109850136115961.5151310701741481232.52218159521318115042825191202452091726373226150284241199105244361853232752261670594924037431926225927765300432368302351129679表3导体长期允许工作温度 75℃PVC（耐热）绝缘电缆载流量（环境温度45℃）芯数123或4芯数123或4标称截面mm2载流量A标称截面mm2载流量A113119501501281051.5171413701901621332.5242017952301961614322722120270230189641352815031026421710574840185350298245167665532404153532912510085703004754043323512510588表4导体长期允许工作温度90℃PVC（耐热）绝缘电缆载流量（环境温度45℃）芯数123或4芯数123或4标称截面mm2载流量A标称截面mm2载流量A1161311501841571291.5211716702331981632.529242195282240197439332712033128223165043341503803232661070594918542936530016938065240508432356251221048630058249540735153129108．天然丁苯绝缘氯丁护套船用电力（软）电缆载流量：型号：CXF、CXFR表5导体长期允许工作温度70℃天然-丁苯橡皮绝缘电缆载流量（环境温度45℃）芯数123或4芯数123或4标称截面mm2载流量A标称截面mm2载流量A1119850141120991.5151811701741481222.52219159521017914742925201202432071706373126150280238196105143361853192712231669594824037531926325917764300431366302351139679．乙丙绝缘氯丁护套船用电力（软）电缆载流量：型号：CEF、CEFR表6导体长期允许工作温度85℃乙丙橡皮绝缘电缆载流量（环境温度45℃）芯数123或4芯数123或4标称截面mm2载流量A标称截面mm2载流量A1161411501801531261.5201714702251911582.5282420952752341934383227120320272224648413415036531025610675747185415353291169077632404904173432512010284300560476392351451231024．电缆载流量修正系数：表7工作系数芯数系数20.853-40.705-60.567-240.4925-420.42≥430.35注：考虑到同时工作系数，上述系数可以适当放宽。表8不同环境空气温度时的修正系数导体工作温不同环境空气温度，℃度℃3540455055606570758085601.291.151.000.82———————651.221.121.000.870.71——————701.181.101.000.890.770.63—————751.151.081.000.910.820.710.58————801.131.071.000.930.850.760.650.53———851.121.061.000.940.870.790.710.610.5——901.101.051.000.940.880.820.740.670.580.47—951.101.051.000.950.890.840.770.710.630.550.45．电缆的短路电流与电抗值：表9短路温度与短路电流乙丙橡皮PVC（一般）PVC耐热天然-丁苯橡皮标称截面mm短路温度，℃285—25060—15075—16070—220时间为1s短路电流，A11461171111431.52181751672142.5364292278357458246644557268747006678571014561166111214291623201866177922862536402915278035733550964081389250025072805830556071457010192816277841000395138321107710564135761201747213992133441714815021840174901668021435185269362157120572264372403494427984266883429630043680351003336042870在选择断路器或熔断器的断开容量时，多数采用I2t的形式，各种电缆的I2t值如表10所示注：其他短路时间的短路电流计算：It=I/（t）^（1/2）式中：It----短路时间为t时的短路电流，A；I-----短路时间为1s时的短路电流，A；t-----短路时间，s。表10I2t值标称截面mmPVC（一般)电缆PVC耐热电缆天然-丁苯橡皮电缆2乙丙橡皮电缆1212001360012400204001.54770030600279004590002.513250034000775001275004339200217600198400326400676320048960044640073440010212000013600001240000204000016542720034816003174400522240025132500008500000775000012750000352597000016600000151900002490000050530000003400000031000000510000007010388000066640000607600009996000095191330000122740000111910000184110000120305280000195840000178560000293760000150477000000306000000279000000459000000185725570000465460000423390000698190000240122112000078336000071424000011750400003001908000000122400000011160000001836000000表11船用电缆在频率为50Hz时的电抗值标称截面mm2二芯及三芯电缆二或三根单芯电缆紧靠时非铠装铠装10.1260.163—1.50.1180.1540.1772.50.1100.1420.16340.1060.1340.15460.1000.1260.144100.09570.1190.137160.09210.1120.127250.08850.1070.118350.08710.1010.114500.08450.0