Blog

What are self-regulating heating cables
Nov 08, 2021

Introduction

Self-regulating heating cables are easier to use and implement as compared to other heat-tracing technologies. They incorporate a heating element that is made up of a polymer core and two parallel conductors.

As the surrounding atmospheric temperatures around the cable decreases, the conductive core contracts on a microscopical level, decreasing the electrical resistance and creating numerous electrical paths between the conductors and when electricity current flows along these paths, the core is heated up and generates the necessary heat.

Inversely, as the surrounding temperature rises, the core expands on a microscopical level, increasing electrical resistance and therefore also decreasing the number of electrical paths and therefore decreasing the heat generated.

Thus, the more electrical paths there are in the cables, the more electric current is able to flow through them, thus more heat is generated and vice-versa.

Benefits of self-regulating cables

1) High operating temperatures up to 205C/400F
2) Easy to install as the cables can be measured and cut to the right length on site and overlapped multiple times without any risk of any overheating.
3) The cables have a fail-safe that will not exceed a dangerous temperature even if the local temperature controls are not operational.

Types of self-regulating cables

BTV
The BTV range of self-regulating heating cables is normally used for frost protection of pipes and vessels but can also be used to maintain heat processes of up to 65°C.

These heating cables are available in two different outer jacket materials:

1)Polyolefin outer jackets (-CR) are suitable for use in areas where the cables will only be exposed to mild inorganic solutions.
2) Fluoropolymer outer jackets (-CT) offer a high general chemical resistance.

QTVR
The QTVR range of self-regulating heating cables is mainly used for frost protection of pipes and vessels requiring a higher power output than the BTV heating cables can supply. They can also be used to maintain heat processes of up to 110°C. These heating cables all have fluoropolymer outer jackets offering a high chemical resistance.

XTV
The XTV range of self-regulating heating cables is used for frost protection of pipes and vessels that require steam cleaning. They can also be used to maintain heat processes of up to 120°C, which is 10°C as compared to QTVR cables. These heating cables all have fluoropolymer outer jackets offering a high chemical resistance.

KTV
The KTV range of self-regulating heating cables is mainly used for frost protection of pipes and vessels that require steam cleaning. They can also be used to maintain heat processes of up to 150°C. These heating cables all have fluoropolymer outer jackets offering a high chemical resistance.

VPL
The VPL range of power-limiting heating cables is mainly used for temperature maintenance of processes and offers the advantage of a high-power output at high temperatures which can reduce the number of heating cables required. They can also be used for frost protection of pipes and vessels that require steam cleaning. These heating cables all have fluoropolymer outer jackets offering a high chemical resistance.

The VPL products are available in various voltages, 110 Vac, 230 Vac and 480 Vac. The 480 V version offers the added advantage of long circuit lengths potentially reducing the number of supply points required.

Summary

We hope you have a better understanding about what and the different types of self-regulating heating cables.

As an expert in the field of heat tracing with many years of experience and having completed various large-scale projects. Supermec provides both constant wattage and self-regulating trace heating systems. Get in touch with our friendly electrical heat tracing experts at sales@supermec.com or you can drop us a call at +65 68619522 to find out how we can assist you with your heat tracing needs and install a heat tracing system to help your business objectives today.


Back