کابل هیت تریس خودتنظیم‌شونده ال ترم ELSR-N

ELTHERM ELSR-N-Halogenfree Self-Regulating Heating Cable

Manufacturer: eltherm GmbH, Germany

Halogen-Free Self-Regulating Heat Tracing Cable for Freeze Protection, Pipelines, Roofs, and Gutters

1. Product Overview

The ELTHERM ELSR-N-Halogenfree is a self-regulating electric heating cable developed by eltherm GmbH, Germany, for low-temperature heating applications. Its halogen-free construction makes it suitable for building services and selected heat tracing installations where flame-retardant properties and reduced fire-related emissions are important considerations.

The cable is designed for freeze protection in pipelines, roofs, gutters, and downpipes. Its self-regulating heating technology allows the heating output to respond to local temperature changes along the heated surface.

A key feature of the ELSR-N-Halogenfree is its halogen-free construction. According to the manufacturer, the cable does not release toxic or corrosive gases in the event of a fire. Its protective mechanism involves the release of water vapor, which helps cool the material, dilute the resulting fire gases, and limit the rapid spread of flames. A thermally stable oxide layer also forms to protect the underlying material.

The product operates at a nominal supply voltage of 230 V and is available in three nominal heating output options: 10 W/m, 20 W/m, and 30 W/m. Two construction variants are offered: AHF, featuring an aluminum foil protective layer, and BHF, featuring a tinned copper protective braid.

2. Applications

The ELTHERM ELSR-N-Halogenfree self-regulating heating cable is designed for suitable low-temperature heat tracing and freeze protection applications, including:

• Freeze Protection: Helps prevent freezing in suitable piping systems exposed to low ambient temperatures.
• Pipelines: Provides electric heat tracing for compatible pipelines and associated installations.
• Roofs: Supports suitable roof heating applications to help prevent ice accumulation in designated areas.
• Gutters: Helps prevent freezing and ice formation in compatible gutter systems.
• Downpipes: Provides heating for suitable drainage and downpipe installations exposed to freezing conditions.
• Building Services: Supports freeze protection requirements in building technology and related installations.
• Water Supply Systems: Can be considered for suitable water supply installations, subject to the applicable technical requirements.
• Sanitation Utilities: Supports appropriate freeze protection applications in compatible sanitation and drainage systems.
• Outdoor Installations: Provides heat tracing for suitable external installations exposed to low ambient temperatures.

The suitability of the cable depends on the required heating output, heat-loss calculations, installation conditions, environmental exposure, and the manufacturer's technical specifications.

3. Key Features and Benefits

• Self-regulating electric heating technology.
• Halogen-free insulation and outer jacket.
• Three nominal heating output options: 10 W/m, 20 W/m, and 30 W/m.
• Nominal supply voltage of 230 V AC.
• Maximum continuous exposure temperature of +65°C when energized.
• Maximum exposure temperature of +80°C when de-energized.
• Minimum installation temperature of −60°C.
• Minimum bending radius of 25 mm.
• Nickel-plated copper bus wires.
• Bus wire cross-sectional area of 1.23 mm².
• Halogen-free polypropylene insulation.
• Halogen-free polypropylene outer jacket.
• UV-resistant construction.
• Moisture-resistant design.
• Flame-retardant and self-extinguishing properties.
• Two protective construction variants: AHF and BHF.
• Aluminum foil protective layer in the AHF version.
• Tinned copper protective braid in the BHF version.
• Compatible with designated ELTHERM junction boxes.
• Suitable for appropriate pipeline, roof, gutter, and downpipe freeze protection applications.

4. Technical Specifications

The following table summarizes the principal technical characteristics of the ELTHERM ELSR-N-Halogenfree self-regulating heating cable.

5. Available Cable Designs

ELSR-N-Halogenfree AHF

The AHF version features halogen-free polypropylene insulation and an outer jacket, together with an aluminum foil protective layer and the associated protective conductor arrangement. This construction is intended for suitable heat tracing installations requiring the specified electrical and mechanical protective features.

The appropriate installation arrangement must be selected according to the application, electrical protection requirements, and manufacturer's technical documentation.

ELSR-N-Halogenfree BHF

The BHF version features halogen-free polypropylene insulation and an outer jacket, with a tinned copper protective braid. The protective braid forms part of the cable's protective construction and must be installed according to the manufacturer's instructions.

The appropriate version should be selected according to the installation requirements, protective conductor arrangement, and applicable electrical and environmental conditions.

6. Cable Construction

The ELTHERM ELSR-N-Halogenfree heating cable incorporates electrical conductors, a self-regulating heating element, electrical insulation, protective layers, and an external jacket designed for the intended heat tracing applications.

• Bus Wires: Nickel-plated copper conductors with a cross-sectional area of 1.23 mm² supply electrical power to the heating element.
• Self-Regulating Heating Element: Responds to local temperature variations by changing its electrical heating characteristics.
• Electrical Insulation: Halogen-free polypropylene insulation provides electrical separation within the cable construction.
• Protective Layer: Aluminum foil is used in the AHF version, while the BHF version incorporates a tinned copper protective braid.
• Outer Jacket: Halogen-free polypropylene provides the external protective covering.
• Protective Conductor Arrangement: The protective configuration depends on the selected cable version and must follow the manufacturer's installation requirements.

The precise layer arrangement depends on the selected construction variant. Electrical connections, protective layers, and terminations must be handled according to the manufacturer's instructions.

7. Operating Principle

The ELTHERM ELSR-N-Halogenfree uses self-regulating heating technology. The electrical characteristics of the heating element change in response to local temperature conditions, allowing the heating output to vary along the cable.

When local temperatures decrease, the heating element generally increases its heat output. As temperatures rise, the heating output generally decreases. This characteristic is useful in heat tracing installations where thermal requirements can vary along pipelines, gutters, downpipes, and other heated surfaces.

Actual heating performance and energy consumption depend on the selected nominal output, supply voltage, ambient temperature, surface or pipe dimensions, insulation, and installation conditions.

Self-regulating operation does not eliminate the need for appropriate electrical protection, correct circuit design, or compliance with the manufacturer's installation instructions. Maximum circuit lengths must be determined using the applicable technical data.

8. Fire Safety and Halogen-Free Construction

A key characteristic of the ELTHERM ELSR-N-Halogenfree is its halogen-free construction. The insulation and outer jacket are made from halogen-free polypropylene, making the cable relevant to installations where halogen-free materials and flame-retardant characteristics are important selection criteria.

According to the manufacturer, the cable does not release toxic or corrosive gases in the event of a fire. Its protective mechanism includes the release of water vapor, which helps cool the material and dilute the resulting fire gases, limiting the rapid spread of flames.

A thermally stable oxide layer also forms during this process, helping protect the underlying material.

These characteristics may be important in building services and other installations where fire behavior and the properties of emitted gases are considered during product selection. Final suitability must be assessed against the applicable project safety requirements and relevant technical documentation.

9. Compatible Junction Boxes

The manufacturer identifies the following junction-box models for use in compatible ELSR-N-Halogenfree installations:

• ELAK-2
• ELAK-5
• ELAK-5.1
• ELAK-5.7
• ELAK-R7
• ELAK-RS
• ELAK-RS-T

The suitability of each junction box depends on the selected cable construction, electrical ratings, installation conditions, and applicable system requirements. All connection and termination accessories must be compatible with the intended installation.

10. Installation and System Design Considerations

Correct cable selection and installation are essential for reliable heating performance and electrical safety. Before specifying the ELSR-N-Halogenfree, the following factors should be evaluated:

• Application Requirements: Identify the pipeline, roof, gutter, downpipe, or other surface requiring heat tracing.
• Required Heating Output: Select the appropriate nominal output of 10 W/m, 20 W/m, or 30 W/m according to the calculated heat losses and installation requirements.
• Heat-Loss Calculations: Consider pipe or surface dimensions, insulation, ambient temperature, and environmental exposure.
• Supply Voltage: Verify compatibility with the nominal 230 V AC supply and the planned electrical circuit.
• Temperature Limits: Observe the maximum permitted exposure temperature when energized and de-energized.
• Bending Radius: Observe the specified minimum bending radius of 25 mm.
• Installation Temperature: Respect the minimum installation temperature of −60°C.
• Environmental Conditions: Consider moisture exposure, ultraviolet radiation, and the mechanical conditions at the installation site.
• Protective Construction: Select the appropriate AHF or BHF version according to the system design and protective requirements.
• Accessories: Verify compatibility with the required junction boxes, connection sets, and termination components.
• Electrical Protection: Select suitable circuit protection and switching equipment in accordance with the applicable technical requirements.

Maximum heating circuit lengths must be determined from the relevant manufacturer data, taking account of startup current, switching temperature, protective device characteristics, voltage drop, and installation configuration. These values should not be estimated solely from the nominal heating output or cable length.

11. Approvals and Technical Documentation

Technical documentation for the ELTHERM ELSR-N-Halogenfree includes product information and installation instructions for applicable ELSR heating cable and gutter heating applications. The product documentation also identifies approval-related information relevant to product selection and installation.

The applicable documentation should be reviewed to confirm the scope of approval for the exact cable construction and intended installation. The presence of documentation associated with a product family does not automatically establish that every cable variant or system configuration is covered by the same approval.

Before specification or installation, verify the relevant technical data, applicable installation standard, accessory compatibility, and any project-specific certification requirements.

12. Electrical Safety, Inspection, and Maintenance

The ELSR-N-Halogenfree must be installed and operated in accordance with the manufacturer's instructions and applicable electrical installation regulations.

Before commissioning, verify that the heating cable, electrical connections, junction boxes, circuit protection, and associated components meet the requirements of the intended installation.

• Use appropriate electrical protection and compatible connection components.
• Check cable condition, terminations, and protective layers before commissioning.
• Observe the specified voltage, temperature limits, minimum bending radius, and installation temperature.
• Ensure that the protective conductor arrangement is correctly implemented for the selected construction.
• Follow the manufacturer's instructions for inspection, maintenance, repair, and replacement.
• Have damaged cables or accessories assessed by suitably qualified personnel.
• Maintain compliance with the applicable electrical safety requirements throughout the service life of the installation.

Inspection and maintenance should follow the manufacturer's instructions and applicable site safety procedures. Damaged cables and accessories must be repaired or replaced only in accordance with approved procedures.

The cable must not be operated outside its specified voltage, temperature, circuit-length, or environmental limits.

13. Advantages for Building and Industrial Installations

The ELTHERM ELSR-N-Halogenfree combines self-regulating heating technology with halogen-free insulation and outer jacket materials. Its available heating outputs allow selection for different suitable low-temperature heat tracing requirements.

The cable is designed for appropriate freeze protection applications involving pipelines, roofs, gutters, and downpipes. Its UV-resistant and moisture-resistant construction supports use in compatible installation environments, subject to the specified operating conditions.

The halogen-free construction and flame-retardant properties make the product relevant to projects where material selection and fire-related emissions are important considerations. Actual system performance depends on appropriate engineering calculations, correct installation, suitable accessories, and compliance with the manufacturer's technical requirements.

14. Product Summary

The ELTHERM ELSR-N-Halogenfree self-regulating heating cable is a low-temperature electric heat tracing solution designed for suitable freeze protection applications involving pipelines, roofs, gutters, and downpipes.

Its principal characteristics include halogen-free polypropylene insulation and outer jacket materials, self-regulating heating technology, UV resistance, moisture resistance, and flame-retardant properties. The cable operates at a nominal supply voltage of 230 V AC and is available in nominal heating outputs of 10 W/m, 20 W/m, and 30 W/m.

The ELSR-N-Halogenfree is available in two construction variants: AHF, featuring an aluminum foil protective layer, and BHF, featuring a tinned copper protective braid. Its specified minimum installation temperature is −60°C, its minimum bending radius is 25 mm, and its maximum continuous exposure temperature is +65°C when energized and +80°C when de-energized.

The product is suitable for consideration in compatible pipeline, roof, gutter, downpipe, and building freeze protection installations. Appropriate heat-loss calculations, circuit design, accessory selection, and compliance with the manufacturer's technical requirements are essential for safe and effective operation.