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
MaterialValueReference
fPOC6.6Handbook of Polyolefins
fPP9.0Hearle and Morton 2008
fPE7.0= 2 x sPE
fPVC12.0= 2 x sPVC
sPVC6.0IEC 60287-2-1
sPE3.5PE, IEC 60287-2-1
PRod8.0mix plastic/air
PTube12.0mix plastic/air
OilD6.0OilP, IEC 60287-2-1
TY5.3
Jute6.0IEC 60287-2-1
tape6.0mix
Air38.2engineeringtoolbox.com
Ot10.0fibrous polypropylene, IEC 60287-2-1