کابل هیت تریس خودتنظیم‌شونده ال ترم ELSR-W

ELTHERM ELSR-W Self-Regulating Heating Cable

Manufacturer: eltherm GmbH, Germany

Self-Regulating Heating Cable for Hot Water Temperature Maintenance and Grease-Containing Wastewater Pipe Heating

1. Product Overview

The ELTHERM ELSR-W is a medium-temperature self-regulating electric heating cable developed by eltherm GmbH, Germany. It is designed for maintaining the temperature of hot water pipelines and heating grease-containing wastewater pipes, particularly in commercial kitchens, cafeterias, and suitable industrial facilities.

Designed for reliable electric heat tracing, the ELSR-W compensates for heat losses from pipework and helps maintain the required operating temperature when incorporated into a properly designed heating system. It is also suitable for selected temperature maintenance applications involving pipelines, tanks, vessels, and silos, subject to the manufacturer's specifications.

The ELSR-W features self-regulating heating technology and a moisture-resistant construction. Its ability to respond to local temperature variations makes it a practical solution for applications where thermal conditions may vary along the installation.

With a nominal operating voltage of 230 V, a maximum maintain temperature of +80°C, and a maximum exposure temperature of +100°C when de-energized, the ELSR-W is intended for medium-temperature heat-tracing applications within its specified operating limits.

2. Applications of the ELSR-W Heating Cable

The ELTHERM ELSR-W is designed for temperature maintenance applications where reliable heat tracing is required to compensate for heat losses and maintain suitable operating conditions.

Hot Water Temperature Maintenance

The ELSR-W is designed to maintain the temperature of hot water pipelines in commercial kitchens, cafeterias, and similar facilities. By compensating for thermal losses, it helps maintain the required water temperature when the cable, pipe insulation, and electrical system are correctly selected and installed.

Grease-Containing Wastewater Pipes

The heating cable is suitable for heating grease-containing wastewater pipework in commercial kitchen environments and other appropriate installations. Maintaining suitable pipe temperatures can support the intended operating conditions of wastewater systems, depending on the specific application and system design.

Industrial Pipeline Heat Tracing

The ELSR-W can be incorporated into industrial pipeline heat-tracing systems where additional heat is required to compensate for heat losses and maintain a specified operating temperature. The required heating output should be calculated according to the pipeline dimensions, insulation, ambient temperature, and operating requirements.

Tanks and Vessels

The cable can be considered for suitable temperature maintenance applications involving tanks and vessels. Its suitability depends on the required temperature, equipment geometry, installation method, and the manufacturer's application guidelines.

Silos and Specialized Installations

The ELSR-W may also be used in appropriate silo and equipment temperature maintenance systems where its electrical and thermal characteristics meet the application requirements. Detailed thermal assessment and verification of the installation conditions are essential before selection.

3. Key Features and Technical Benefits

Self-Regulating Heating Technology

The ELSR-W uses self-regulating heating technology that responds to local temperature variations. As the temperature changes, the electrical characteristics of the heating element change, adjusting its heat output accordingly. This allows different sections of the cable to respond to their individual thermal conditions.

Temperature Maintenance up to +80°C

The ELSR-W is designed for applications with a maximum maintain temperature of +80°C. This rating makes it suitable for specified medium-temperature heat-tracing applications, provided that all operating and installation requirements are respected.

Maximum Exposure Temperature of +100°C

The maximum exposure temperature is +100°C when the heating cable is de-energized. This limit must be distinguished from the maximum maintain temperature and must be observed when designing, installing, and operating the system.

Moisture-Resistant Construction

The ELSR-W features a moisture-resistant design intended for suitable applications where moisture protection is required. Appropriate connection kits, end terminations, junction boxes, and sealing components must be selected for the actual installation environment.

Flexible Installation

The minimum bending radius is 20 mm, supporting installation around suitable pipework and equipment geometries. The cable must be handled and installed according to the manufacturer's instructions to prevent mechanical damage.

Low-Temperature Installation Capability

The minimum installation temperature is −20°C. This specification defines the lower temperature limit for installation and must be considered when planning work in cold environments.

Two Nominal Heating Outputs

The ELSR-W is available with two nominal heating output options. The appropriate variant should be selected according to the calculated heat loss, required maintenance temperature, installation conditions, and the manufacturer's official output data.

230 V Nominal Operating Voltage

The cable is designed for heat-tracing systems using the specified nominal supply voltage. The electrical circuit, protection devices, maximum circuit length, and connection accessories must be selected in accordance with the manufacturer's technical documentation and applicable electrical regulations.

4. Operating Principle

The ELTHERM ELSR-W operates using self-regulating heating technology. Its heating element responds to temperature variations by changing its electrical resistance, allowing heat output to adjust to local thermal conditions.

When the surrounding temperature decreases, the heating element generally produces more heat. As the temperature increases, the heat output generally decreases. This characteristic allows sections of the cable exposed to different temperatures to respond individually.

When installed on an appropriately designed and insulated pipeline, the heating cable compensates for thermal losses and helps maintain the required operating temperature. The actual heat output depends on the cable variant, local temperature, supply conditions, and installation configuration.

Self-regulating operation does not eliminate the need for suitable electrical protection, correct circuit design, appropriate installation accessories, or temperature monitoring where required by the application.

5. Technical Specifications

The following table summarizes the principal specifications of the ELTHERM ELSR-W product. Values should be confirmed against the official datasheet for the exact cable variant before procurement or installation.

6. Installation and System Design Considerations

Correct system design and installation are essential for reliable heating performance, electrical safety, and long-term operation. The heating cable should be selected only after assessing the thermal requirements of the intended application.

Heat-Loss Calculation

Calculate the required heating output based on pipe diameter, pipe material, insulation thickness and conductivity, ambient temperature, required maintenance temperature, and installation conditions. For tanks, vessels, and silos, the calculation should also account for surface area and equipment geometry.

Selection of Heating Output

Choose the appropriate ELSR-W variant using the manufacturer's output curves and technical tables. The selected cable must provide sufficient heat output under the expected operating conditions without exceeding the permitted temperature limits.

Maximum Heating Circuit Length

Determine the permissible heating circuit length from the manufacturer's official design tables. The allowable length may depend on the selected cable variant, start-up temperature, supply voltage, circuit-breaker rating, and installation conditions.

Electrical Protection

Use suitable overcurrent and residual-current protection in accordance with the manufacturer's requirements and applicable electrical regulations. All connections, protective conductor arrangements, and cable terminations must be completed by qualified personnel.

Bending Radius and Mechanical Handling

Observe the minimum bending radius of 20 mm and avoid twisting, crushing, stretching, or otherwise damaging the heating cable during installation. Follow the manufacturer's instructions for cable routing and attachment.

Installation Temperature

The specified minimum installation temperature is −20°C. The cable should be handled and installed within the permitted temperature range to prevent damage to its construction.

Thermal Insulation

Suitable thermal insulation can reduce heat losses and improve system efficiency. Insulation materials and installation methods must be compatible with the operating temperature and the application. Any temperature sensors or control equipment required by the design should be installed in accordance with the system specification.

Inspection Before Commissioning

Inspect the heating cable, end terminations, junction boxes, electrical connections, and protective arrangements before energizing the system. Carry out the electrical tests specified by the manufacturer and applicable standards.

7. Compatible Accessories

The following accessories are listed for use with the ELSR-W product family. Compatibility should be verified against the selected cable variant and the intended installation configuration.

Connection and Termination Kits

• ELVB-SRA-25
• ELVB-SRV-N-LS-W
• El-Clic

Compatible Junction Boxes

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

Depending on the installation, a complete heat-tracing system may also require appropriate mounting materials, thermal insulation, electrical protection devices, and temperature monitoring or control equipment.

Confirm that every connection kit, junction box, cable entry, and termination component is approved for the exact ELSR-W cable configuration and the environmental conditions of the installation.

8. Hot Water Temperature Maintenance and Hygiene

Maintaining hot water temperatures is an important consideration in commercial kitchens, cafeterias, and other facilities with hot water distribution systems. Heat losses from long pipelines can cause water temperatures to decrease between the heat source and the point of use.

The ELSR-W can help compensate for these heat losses when appropriately selected and installed. Maintaining the required temperature can support the temperature-management strategy of the overall hot water system.

However, a heating cable alone does not guarantee Legionella prevention or microbiological safety. Effective water hygiene requires a properly designed and maintained system, appropriate temperature management, and compliance with applicable hygiene guidance and regulations.

9. Safety and Maintenance

The installation and electrical connection of the ELTHERM ELSR-W must be carried out by qualified personnel in accordance with the manufacturer's instructions and applicable electrical regulations.

Before commissioning, verify the cable condition, electrical connections, end terminations, protective earthing, and circuit protection. Periodic inspections should be performed according to the environmental conditions and maintenance requirements of the system.

Pay particular attention to mechanical damage, moisture ingress at connections, deteriorated insulation, and damaged junction boxes. If damage is identified, the system should be assessed by qualified personnel before further operation. Repairs and replacements must follow approved manufacturer procedures.

The maximum maintain temperature of +80°C and maximum de-energized exposure temperature of +100°C must be observed. The self-regulating characteristic does not replace suitable electrical protection or correct system design.

10. Product Advantages

The ELTHERM ELSR-W combines self-regulating heating technology, moisture-resistant construction, and medium-temperature operating capability for a range of commercial and industrial heat-tracing applications.

• Self-regulating heating technology that responds to local temperature variations.
• Suitable for hot water temperature maintenance in commercial kitchens and cafeterias.
• Designed for heating grease-containing wastewater pipework in suitable applications.
• Maximum maintain temperature of +80°C.
• Maximum exposure temperature of +100°C when de-energized.
• Nominal operating voltage of 230 V.
• Minimum installation temperature of −20°C.
• Minimum bending radius of 20 mm.
• Moisture-resistant construction for suitable installation environments.
• Two nominal heating output variants for different heat-tracing requirements.
• Potential use in suitable pipelines, tanks, vessels, and silos.

These features make the ELSR-W a practical option for applications requiring temperature maintenance and reliable electric heat tracing, provided that the selected cable meets the project's thermal, electrical, and environmental requirements.

11. Conclusion

The ELTHERM ELSR-W is a medium-temperature self-regulating electric heating cable manufactured by eltherm GmbH, Germany. It is primarily intended for maintaining hot water temperatures and heating grease-containing wastewater pipes in commercial kitchens, cafeterias, and suitable industrial facilities.

Its self-regulating heating technology enables the cable to respond to local temperature variations, while its moisture-resistant construction supports use in appropriate heat-tracing environments. With a nominal voltage of 230 V, a maximum maintain temperature of +80°C, a maximum de-energized exposure temperature of +100°C, and a minimum bending radius of 20 mm, the ELSR-W is designed for specified medium-temperature heating applications.

The cable may also be used for suitable temperature maintenance applications involving pipelines, tanks, vessels, and silos. Successful implementation requires appropriate heat-loss calculations, selection of the correct cable output, compatible accessories, suitable electrical protection, and compliance with the manufacturer's installation instructions.