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Reeling & Trailing Cable Mechanical & Thermal Characteristics

 

A. Cable Minimum Bending Radius :

  • Installation condition 1.1/1.1kV 6D 3.3/3.3~33/33kV 8D
    For dispatch drum barrel 6D 8D
    For fixed bend 4D 6D
    For free flexing 6D 10D
    For permanently repeating reeling 10D 12D
    For passing over sheaves 10D 15D
  • For XLPE and Paper insulated HV cables, bending radii is 18D (during installation) / 12D (installed).

B. Cable Maximum Pulling Tension :

  • For trailing the cable 20N/mm² of the total cross-sectional area of phase conductor
    For dragging the cable calculated by T = L*W*f*10, where T is the pulling tension, L is the length of cable to be pulled
    (m), W is the weight of the cable (kg/m), f is the friction coefficient (usually take as 0.5)

C. Temperature :

  • Maximum continuous conductor temperature: +90℃
  • Minimum continuous conductor temperature: -25℃