Cableizer ®

Max. temperature conductor

Values for maximum conductor temperature depending on the insulation material for normal operation, under emergency overload operation (max 8 hours/day and 100 hours/year) and during short-circuit are according to IEC 60840 and IEC 62087 where available with the following additions:

The IEC 60724 defines the short-circuit temperature limit of PVC at 160°C for cables with cross-section ≤ 300mm$^2$ and at 140°C for cables with cross-section > 300mm$^2$

Symbol
$\theta_{cmax}$
Unit
°C
Related
$M_i$
Insulation material
$\theta_{cmaxeo}$
Max. temperature conductor, emergency overload [°C]
$\theta_{cmaxsc}$
Max. temperature conductor, short-circuit [°C]
$\theta_{kf}$
Final temperature [°C]
Used in
$\delta \theta_{c,\infty}$
Steady-state temperature rise conductor [K]
$\Delta \theta_{max}$
Maximum permissible conductor temperature rise [K]
$\delta \theta_{R,\infty}$
Max permissible conductor temperature rise in the steady-state [°C]
$\Delta W$
Incremental heat generated [W]
Choices
Materialnormal operationemergency overloadshort-circuit
PE7080130
HDPE8090160
XLPE90105250
XLPEf90105250
PVC7590160
EPR90105250
IIR85105250
PPLP7080130
Mass8095150
OilP8095150
PP8095150
SiR100130225
EVA100130180
XHF110130250
ETFE110130230
FEP110150260
PTFE110150305
PFA110150290