If tracing is applied, you will quickly notice that these cables are available in many different types and sizes. In many cases, a choice is made (depending on the application) between self-regulating tracing or constant wattage tracing.
Thanks to the parallel circuit, both types of tracing can be cut to length at any point. This is very practical when cables need to be adjusted on-site. Standard tracing deliveries include termination kits, allowing the cable to be safely cut to the required length.
The main difference between these cables lies in how heat is generated. Self-regulating tracing produces heat with fluctuations determined by the ambient temperature. When the ambient temperature drops, the cable increases its output. When the ambient temperature rises, the cable automatically reduces its output.
As a result, self-regulating tracing does not require external control and cannot overheat.
Constant wattage tracing operates according to a completely different principle. This cable delivers the same output along its entire length, regardless of the ambient temperature. This type of tracing is mainly used in applications that require minimal heat loss or where a system must be actively maintained at a specific temperature.
With this type of tracing, an external controller is almost always used. With such a controller, you can regulate the tracing remotely with precise temperature control.
Another difference between these types of tracing is the temperature levels the cables can withstand. Constant wattage tracing can generally endure higher temperatures and is therefore suitable for industrial applications that must be maintained at a specific temperature. This type of tracing is available in various power ratings, up to 150 W/m. Depending on the cable type, these cables can withstand temperatures up to 425°C.
Self-regulating tracing operates at somewhat lower temperatures and power levels. These cables are suitable for both industrial and commercial applications. Typically, they can withstand temperatures up to 250°C, depending on the cable type. Their power output can reach up to 100 W/m.
Choosing the right type of tracing strongly depends on the application. If you have an application that requires a constant output or if tracing is used for process heating, constant wattage tracing is often the preferred choice. It provides consistent performance with precise temperature control. With an external controller, the cable can be accurately managed to ensure stable operation.
Constant wattage tracing is often used in shorter circuits with higher temperatures.
If you want to use tracing for frost protection, for example in pipelines or gutters, self-regulating tracing is typically the better option. In these applications, the cable does not need to operate at full power continuously, as its output adjusts automatically based on ambient temperature.
Self-regulating tracing is suitable for longer circuits and is easy to install on-site.
Each tracing application is unique and generally requires a custom solution. At Heating Group International, we take care of the entire process from A to Z. Based on the right application data, we can calculate power requirements, cable length, and loop spacing, and then provide the most suitable tracing solution.
If you want to apply tracing and ensure that the correct type and power are selected, Heating Group International is the right partner.
If you have any further questions, feel free to contact us to discuss the possibilities!
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