VELOX TCTR SERIES RESISTIVE, WITH RETURN-WIRE
 |
- Sheath of Teflon FEP
- Armouring braided Cu, 16x3x0.21mm
- Armouring layer Teflon FEP
- Armouring braided Cu 16x3x0.21mm
- Conductor insulation Teflon FEP
- Resistance wire CuNi
|
Area of use
Temperature maintenance and heating up piping, tanks etc in plants with high temperatures and high power requirements.
TCT can be installed at plants which are steam purified.
TCT has a sheath of corrosion toughened material (teflon) and manages aggressive environmentals.
Cable data
| Basic type |
90 CM acc. to SEN 242421 |
| 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 on
– cable off |
(Tp)
(TpOn) See diagram
(TpOff) max +220°C |
| Installation temperature |
min -30°C |
| Bending radius |
min 15 mm |
| Dimension |
5 mm |
| Weight |
68 kg/1000m |
Table 1: Resistance values
Type of cable
(Ohm/m) |
Part.no |
| 12.00 |
18812TR |
| 8.00 |
18800TR |
| 5.35 |
18535TR |
| 4.00 |
18400TR |
| 2.90 |
18290TR |
| 1.30 |
18130TR |
| 1.00 |
18100TR |
| 0.82 |
18082TR |
| 0.65 |
18065TR |
| 0.45 |
18045TR |
| 0.36 |
18036TR |
| 0.25 |
18025TR |
| 0.18 |
18018TR |
| 0.10* |
18010TR |
| 0.05* |
18005TR |
| 0.03* |
18003TR |
| 0.01* |
18001TR |
* On special order (delivery time: 3-4 weeks)
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 coeffience |
| Ua |
Installed without dissipation of heat |
= |
0.32 |
| Ua |
With fitted Aluminium foil |
= |
0.65 |
| Ua |
With fitted Alu-tape |
= |
0.8 |
xample:
Velox TCTR mounted without dissipation of heat with an ambient temperature of 100°C, output 30 W/m will have a sheath temperature of 192°C.
Sheath temperature: diagram 1
TCTR cable installed with fitted aluminium tape as dissipation of heat (Ua = 08)
Disspipation of heat
The heat transfer coefficient (Ua) can be improved considerably (3 to 10 times) by arranging some dissipation of heat, for instance by providing the cable with aluminium tape. This will enable you to use the heating cable also at high process temperatures up to 200°C.
For this kind of installation please consult VärmeKabelTeknik for assistance with the design and installation.
