Self Regulating Cable Construction

At low temperatures, there are many conductive paths, allowing current to flow between the bus wires.

At high temperatures, the polymer expands, reducing the number of the conductive paths, and thus reducing current flow.

The below diagram highlights the Self Regulating cable’s construction. 


Conductive Polymers in Action and technology

The below diagram shows the Conductive Polymers in action. As the pipe temperature increases the power output decreases.



Power output varies with temperature

As pipe temperature increases, power output decreases


The correct amount of heat has to be supplied to the pipe

Cold sections of the pipe get more heat input

Warm sections of the pipe get less heat input

As shown below the Conductive Polymers change automatically. As such the cold sections of the pipe get more heat input and the warm sections of the pipe get less heat input.


Advantages of  SR heat-tracing cables

  • Output power changes with temperature
  • Will not overheat and damage
  • Overlapping cable is possible
  • Parallel conducting paths
  • Can be cut to length and terminated on site
  • According to need can use two-way or three-way connection
  • Corrosion resistant jacket
  • Can be used at 120 volts, 208-277 volts
  • Highest maintain temperature up to 150  degC
  • Maximum exposure temperature up to 250 degC
  • Can be used for to heat plastic pipes
  • Approved for use in non-hazardous and hazardous areas

Learn more about each type of product in this section;

Download brochure

Interested in finding out more?