SELF REGULATING HEATING CABLE

CAHT - High Temperature

 

CONSTITUTING

Self regulating heating cables CAHT, with varying output, are parallel type (to be cut to length on the job site).

Their output is directly dependant on the surrounding temperature.

They include two bus wires embedded in a PTC semi conductive compound (Positive Temperature coefficient). The ohmic resistance of this semi conductive compound increases proportionally with its temperature.

So, the output power (inversely proportional) will decrease when the temperature increases and reach an equilibrium value.

The cable is sheathed with a fluorinated resin.

Maximum temperature when energized : 120°C

Maximum temperature when de energized : 200°C

A metallic braid (tinned copper or stainless steel) can be proposed, assuming a better mechanical protection and allowing to perfectly earth the installation.

An over jacket, made of fluorinated resin is proposed when corrosive risks are present.

WORKING PRINCIPLE

OUTPUT WATT PER METER

APPLICATIONS

Self regulating heating cables CAHT having a variable output are usually designed for the following applications :

· Temperature maintenance up to 120°C

· Maintenance temperature in pipes carrying heavy fuel oil

MAIN ADVANTAGES

This technology involves the following advantages :

· Temperature intrinsic limit : 120°C

· To be cut to length on the site (even for some millimeters)

· Possible derivations and tee connections (energy is available on the whole length of the cable)

· Thermostat is not indispensable in some cases

· Standard voltage : 230 volts

MAIN CHARACTERISTICS

Circuit maximum length : 110 to 120 meters or 2500 W
Maximum exposure temperature when energized : 120°C
Maximum exposure temperature when de energized : 200°C (continuously)

Maximum exposure temperature when de energized : 210°C (occasually)

Electrical protection (fuses) : nominal power * 2 to 3

Differential protection : 30 mA

LOAD TECHNICAL DOCUMENTATION : PDF format

SUMMARY