Temperature coefficient of conductor material

Temperature coefficient of conductor material per K at 20°C Values are taken from standard IEC 60287-1-1 Ed.2.1 when available.

Value for Aldrey (AL3) is taken from diploma thesis 'Quantifying the effect of time and temperature on the mechanical behaviour of Aldrey overhead line conductors' by M. Frigerio, 2016.

Values for some other elements are:

Iron 5.671e-3
Molybdenum 4.579e-3
Tungsten 4.403e-3
Silver 3.819e-3
Platinum 3.729e-3
Gold 3.715e-3
Zinc 3.847e-3
Steel (alloy 0.05% carbon) 3.0e-3
Nichrome (80% Ni 20% Cr) 0.17e-3
Manganin (Cu86/Mn12/Ni2) +/-0.015e-3
Constantan (Cu-Ni alloy) -0.074e-3

Symbol

$\alpha_c$

Unit

1/K

Related

$M_c$

Material of conductor

Used in

$\beta_c$

Reciprocal of temperature coefficient of conductor material [K]

$\Delta W$

Incremental heat generated [W]

$R_{cDC}$

Electrical DC resistance of conductor [$\Omega$/m]

Choices

Material	Value	Reference
Cu	0.00393	IEC 60287-1-1
Al	0.00403	IEC 60287-1-1
AL3	0.004	Manufacturer
Brz	0.003	IEC 60287-1-1
CuZn	0.0019	engineeringtoolbox.com
Ni	0.00587	engineeringtoolbox.com
SS	0.001	engineeringtoolbox.com