The Advantages Of XLPE Insulated Cable Over PVC - STEP CABLES

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Advantages of Insulated Power Cable

following are the advantages of ‘XLPE’ insulated cable over that of PVC insulated cable.

  • Higher current rating: withstands continuous conductor temperature of 900c, whereas PVR withstands only 700c, which means higher current carrying capacity.

  • Hugher overload Capacity: STEP’ cable can operate even at 1300c, during emergency, unlike PVC cable with cannot operate beyond 1200c. Thus an emergency, the entire system need not go out of commission if some of the cable fail, because the other cable in parallel can carry a higher load.

  • Higher short Circuit rating: can withstand conductor temperatures of upto 2500C during a short circuit - PVC cannot withstand more then 1600C.

  • Ligther in weight, smaller bending radius: Ligther in weight, smaller bending radius than PVC enbles installation of ‘XLPE’ cable even in cramped space conditions. The cable require less support, thus lowering intallation costs.

  • Lower di-electric constant and power factor: results in saving in power losses which means saving in costs, particularly for higher voltage.

  • better impact, abrasion, corrosion resistance: safer than PVC cables against mechanical damage, abrasion and corrosion.

  • easier jointing and termination: requires no special skills or equipment for jointing and termination.

comparison constant

finvul-x PVC
dielectric constant 2.35 6to8
dielectric strength KV/mm 22 14
volume resistivity ohm-cm 1014 1013
thermal resistivity 0C cm/W 350 600
power factor at maximum conductor temperature 0.008 0.1
normal conductor operating temperature 0C 90 70
emergency overload temperature 0C 130 120
maximum short circuit temperature 0C 250 160
IS:7098 (Part-I) factor