Longline (HTP1F) is a series resistance, single conductor heating cable . It is supplied in multiples of three cables for configuring into a 3 phase heating system. It is used for freeze protection or process temperature maintenance of long pipelines up to 5km. A typical application is the freeze protection of above ground water pipelines.
Longline (HTP1F) minimises the number of electrical supplies needed and so minimises supply cabling and distribution equipment costs. Circuits are often fed at the pipe ends only.
The number of heating cables and their conductor size is varied to produce the desired heat output for the circuit length required. The Longline (HTP1F) heating cables are connected directly to the 3 phase mains voltage or to a step-up transformer.
The large heated surface of Longline (HTP1F)'s flat foil construction results in lower operating temperatures than equivalent round conductor constructions thereby improving safety and system life. The high efficiency produces high power capability up to 23W/m for each cable.
Example of Applications
- Long pipelines
- Buried pipelines
- 3-Phase heating systems
- Circuit lengths up to 5km
- Single supply point, minimises supply cabling costs
- Available up to 600VAC
Product Specification - maximum withstand temperature 125°C (257°F)
Longline (HTP1F) is available in 10, 15, and 23 W/m outputs.
Maximum Withstand Temperature
( Power off )
Minimum Installation Temperature
Minimum Operating Temperature
up to 600V 3-Phase
HTP1F-CT 22.0 x 8.0mm +/- 0.5mm (16mm²)
HTP1F-CT - 65.0 kg (16mm²)
Minimum Bending Radius
Maximum Workpiece Temperatures (°C)
Heater Nominal Output (W/m)
Surface temperature limits in acordance with EN50014