Cableizer

Thermal resistivity filler

The IEC 60287 does not list materials for filler but states: depending on the filler material and its compaction, the thermal resistivity is in the range 6 to 13 K.m/W for cables with extruded insulation, 10 K.m/W is suggested for fibrous polypropylene.

Following values are taken from IEC 60287-2-1 for insulation or jacket with following additions:

Symbol
$\rho_{f}$
Unit
K.m/W
Related
$M_{f}$
Filler material
Used in
$T_{1}$
Thermal resistance conductor—sheath [K.m/W]
$T_{2}$
Thermal resistance armour bedding [K.m/W]
$T_{f}$
Thermal resistance filler [K.m/W]
Choices
CodeValueMaterialReference
fPOC6.6fibrous (Polyolefin copolymer)Handbook of Polyolefins
fPP9.0fibrous (Polypropylene)Hearle and Morton 2008
fPE7.0fibrous (Polyethylene)= 2 x sPE
fPVC12.0fibrous (Polyvinyl chloride)= 2 x sPVC
sPVC6.0solid (Polyvinyl chloride)IEC 60287-2-1
sPE3.5solid (Polyethylene)PE, IEC 60287-2-1
PRod8.0plastic rodmix plastic/air
PTube12.0plastic tubemix plastic/air
OilD6.0oil ductOilP, IEC 60287-2-1
TY5.3textile yarn
Jute6.0JuteIEC 60287-2-1
tape6.0tapemix
Air38.2Airengineeringtoolbox
Ot10.0Otherfibrous polypropylene, IEC 60287-2-1