TCPRH
VELOX TCPRH SERIES RESISTIVE, WITH RETURN-WIRE
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Cable data Electric field strength not measurable cable < 3 Vm * No stock-item
Magnetic field strength not measurable cable < 0.06 micro Tessla
Basic type
90 CM acc. to IEC800
Tested and approved by
SEMKO (Sweden) • SETI (Finnland) • NEMKO (Norway)
Meet requirements from
VDE (Germany) • BS (England) • DEMKO (Denmark)
Rated voltage
440 V
Sheath temperature
(Tm) max +90°C
Dimensioning temperature
max +90°C
Installation temperature:
min -10°C
Bending radius
min 45 mm
Dimension
6.5 ± 0.5 mm
Weight
100 kg/1000m
Type of cable
(Ohm/m)Temperature
coefficience
Part.no
12.00
0.04
18812RH*
8.00
0.15
18800RH*
4.00
0.40
18400RH*
2.90
0.40
18290RH*
1.90
0.40
18190RH*
1.30
0.14
18130RH*
1.00
0.14
18100RH*
0.82
0.14
18082RH*
0.65
0.14
18065RH*
0.45
0.25
18045RH*
0.36
0.25
18036RH*
0.25
0.40
18025RH*
0.18
0.70
18018RH*
Sheath temperature/Dimensions
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 °C |
| Tp | = | Process temperature in °C |
| Q | = | Load in W/m |
| Ua | = | Heat transfer coefficience |
Example:
Velox TCP/R mounted without dissipation of heat with an ambient temperature of 25°C, loaded with 20 W/m will have a sheath temperature of 65°C
Installation in asphalt
Asphalt: max. load 30 W/m cable.
Sheath temperature: diagramm 1
Cable installed free in air or against heat conducting material (Ua = 0.45)
Dissipation of heat
The heat transfer coefficient (Ua) can be improved considerably (3 to 10 times) by arranging some dissipation of heat, for instance by proating the cable with aluminium tape.
For this kind of installation please consult VärmeKabelTeknik for assistance with the design and installation.