TCT
VELOX TCT SERIES RESISTIVE, WITHOUT RETURN WIRE
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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 acc.to 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
Type of cable
(Ohm/m)
Part.no
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 Example: 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.
Tm
=
Sheath temperature in °C
Tp
=
Process temperature in °C
Q
=
Load in W/m
Ua
=
Heat transfer coefficience
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.