CABLES AND WIRES - Novkabel

Permitted operatingtemperatureEnvironment temperatureInsulation90 O C30 O CXLPEConductor Copper AluminiumMethod of cableinstallationMulti-coreSingle-core - intriangleIn groundMulti-coreSingle-core - intriangleNo. of loaded cores 3 3 3 3Nominal cross-section ofCu conductors (mm 2 )Load (A)35 174 177 135 13650 206 209 158 16270 254 256 196 19995 305 307 234 238120 348 349 268 272150 392 393 300 305185 444 445 342 347240 517 517 398 404300 585 583 457 457400 671 663 529 525500 758 749 609 601The depth of laying in the ground is 70 cm.Specific thermal resistance of ground is 1 Km/W.Tabela: Correction factor depending on the ambient temperatureAmbient temperature ( O C)insulationLaying in10 15 20 25 30 35 40 45 50PVCXLPEAir 1,22 1,17 1,12 1,06 1,00 0,94 0,87 0,79 0,71Ground 1,10 1,05 1,00 0,95 0,89 0,84 0,77 0,71 0,63Air 1,15 1,12 1,08 1,04 1,00 0,96 0,91 0,87 0,82Ground 1,07 1,04 1,00 0,96 0,93 0,89 0,85 0,80 0,76225Table: Correction factor depending on the specific thermal resistance of groundSpecific thermal ground resistance(Km/W)Nominal cross-section of conductor(mm 2 )0,7 1,0 1,2 1,5 2,0 2,5 3,0do 25 1,11 1,00 0,94 0,87 0,78 0,72 0,6735 do 95 1,13 1,00 0,93 0,86 0,76 0,70 0,64120 do 240 1,14 1,00 0,93 0,85 0,76 0,69 0,63300 and more 1,15 1,00 0,92 0,85 0,75 0,68 0,63Table: Correction factor for multi-core cables