Aerial Cables

Conductor Name      

  • secondly copper conductor    —  (T) Bypass
  • Soft copper conductor           —  TR
  • Aluminium conductor            —   L
  • ACSR conductor                   —   G

   Insulation Name     

  • polyvinyl chloride insulation   —  V
  • PE insulation                        —  Y
  • XLPE insulation                     —  YJ
  • Light thin insulation               —  /Q
  • polyethylene or PE covering    —  Y

Sample

  • Al conductor XLPE insulated aerial cables, rated voltage 12kV, single core, the nominal cross section 120 mm2, expressed as: JKLYJ-12kV 1×120 IEC 60502-2004
  • Rated voltage of 1kV copper core PVC insulated aerial cable, single core, the nominal cross section 70mm2 , expressed as: JKV-1kV 1×70 IEC60502-2004

 

SECTIONAL DIAGRAM

 

Key:

1. Cu or A1 stranded conductor,

2. Insulation,

3. Steel Load-bearing stranded core,

4. Conductor screen,

5. Insulation

 

Temperature correction factors for current rating

Conductor
operating
temperature
 Ambient temperature (in air) ℃     
  10 12 20 25 30 35 40 45 50
 60  1.58  1.50  1.41  1.32  1.22  1.11 1.00   0.86  0.73
 65  1.48  1.41  1.34  1.26 1.18   1.09  1.00  0.89  0.77
 70  1.41  1.35  1.29  1.22  1.15  1.08  1.00  0.91  0.81
 75  1.36  1.31  1.25  1.20  1.13  1.07  1.00  0.92  0.84
 80 1.32   1.27  1.22  1.17  1.11  1.06  1.00  0.93  0.86
 90  1.26  1.22  1.81  1.14  1.09  1.04  1.00  0.94   0.89
Category: