1. Sheath in Teflon FEP
  2. Armouring Braided Cu 6x3x0.21mm
  3. Conductor insulation Teflon FEP
  4. Resistance wire Cu, CuNi

Area of use

Temperature maintenance and heating of piping, tanks, vents etc in applications with high temperatures, large power requirements and aggressive environmentals.

TCT can be installed at plants which are steam purified.

TCT has a sheath of corrosions toughened material (teflon) and manages aggressive environmentals.

Cable data

Basic type 90 CM IEC800
Tested and approved by SEMKO (Sweden) • SETI (Finnland) • VDE (Germany)
Rated voltage 440 V
Resistance values according to table 1 and 2
Process temperature
– cable off
(Tp) depending on load
(TpOff) max +220°C
Installation temperature min -30°C
Bending radius min 15 mm
Dimension 4.1 mm
Weight 35 kg/1000m
Table 1: Resistance values

Type of cable
12.00 18812T
8.00 18800T
4.00 18400T
2.90 18290T
1.90 18190T
1.30 18130T
1.00 18100T
0.82 18082T
0.65 18065T
0.45 18045T
0.36 18036T
0.25 18025T
0.18 18018T
0.01 Kallkabel 1.5 18001T

Sheath temperature

Sheath temperature

The sheath temperature (Tm) of the cable will vary depending on the process (ambient) temperature (Tp), load (Q) and way of installation.

The sheath temperature is calculated as follows:

Tm = Q / Ua + Tp

Tm = Sheath temperature in °C
Tp = Process temperature in °C
Q = Load in W/m
Ua = Heat transfer coefficience


Velox TCT mounted without dissipation of heat at an ambient temperature of 100 °C, loaded with 30 W/m will have a sheath temperature of 145°C.

Sheath temperature: diagram 1

Cable installed free in air or against heat conducting material (Ua = 0.65)


Dissipation of heat

The heat transfer coefficient (Ua) can be improved considerably (3 to10 times) by arranging some dissipation of heat, for instance by providing the cable with aluminium tape.

For this kind of installation please consult VärmeKabelTeknik for assistance with the design and installation.