VELOX TCPR SERIES RESISTIVE, WITH RETURN WIRE
Cable data Electric field strength not measurable cable< 3 Vm
Magnetic field strength not measurable cable < 0.06 micro Tessla
90 CM acc. to IEC800
Tested and approved by
SEMKO (Sweden) • SETI (Finnland) • NEMKO (Norway)
Meets requirements from
VDE (Germany) • BS (England) • DEMKO (Denmark)
(Tm) max +90°C
– Cable off
(TpOff) max +90°C
min 25 mm
5.5 ± 0.5 mm
Type of cable (Ω/m)
Electric field strength not measurable cable< 3 Vm
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 TCPR mounted without dissipation of heat at an ambient temperature of 25°C, loaded with 20 W/m will have a sheath temperature of 65°C.
Installation in sand, concrete and asphalt
Sand: max. load 20 W/m cable.
Concrete: max. load 25 W/m cable.
Sheath temperature: diagram 1
Cable installed free in air or against heat conducting material (Ua = 0.45)
Read the diagramme from right to left (see example = yellow line)
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.