کابل هیت تریس خودتنظیم‌شونده ال ترم ELSR-R

ELTHERM ELSR-R Self-Regulating Heat Tracing Cable

Manufacturer: eltherm GmbH, Germany

Round Self-Regulating Heating Cable for Freeze Protection and Specialized Profile Heating Applications

1. Product Overview

The ELTHERM ELSR-R self-regulating heat tracing cable is a low-temperature electric heating solution manufactured by eltherm GmbH, Germany. Featuring a round cable geometry, the ELSR-R is particularly suitable for specialized installations where conventional heating cable shapes are less convenient, especially in compatible door seals, sealing systems, and confined installation spaces.

The ELSR-R is primarily designed for freeze protection in cold-storage facility doors, freezer-room entrances, door profiles, and selected cooling water lines in breweries and beverage production facilities. Its self-regulating heating technology adjusts the local heat output in response to temperature changes, helping maintain the required thermal conditions along the installation.

The cable features a moisture-resistant construction, UV resistance, and a fluoropolymer outer jacket. Its round profile facilitates installation in suitable grooves and sealing profiles, making it a practical solution for specialized industrial heat tracing applications.

The ELSR-R is available with nominal heating outputs of 19 W/m and 27 W/m at a reference temperature of 10°C. The appropriate variant should be selected according to the required heat output, installation conditions, and the manufacturer's technical documentation.

2. Applications of the ELSR-R Heating Cable

The ELTHERM ELSR-R is designed for specialized low-temperature heat tracing applications where a round cable geometry and reliable freeze protection are required.

Freeze Protection for Cold-Storage Doors

The ELSR-R can be installed in suitable door frames, seals, and profiles to help prevent ice formation and support the proper operation of cold-storage doors and freezer-room entrances.

Door Seals and Profile Heating

The round cable construction facilitates installation in compatible sealing systems and door profiles. Heating these areas helps reduce the risk of freezing, which could otherwise affect sealing performance, door operation, or the reliability of cold-storage equipment.

Cooling Water Lines in Breweries

The ELSR-R can be used for freeze protection of suitable cooling water lines in breweries, subject to the required heat output, operating conditions, and the manufacturer's installation requirements.

Beverage Production Facilities

The cable is suitable for selected heat tracing applications in beverage manufacturing facilities, particularly where cooling water lines and specialized equipment require protection against freezing.

Specialized Industrial Installations

The round geometry makes the ELSR-R a useful option for customized installations where a compact, self-regulating heating cable is required for compatible grooves, profiles, and confined spaces.

3. Key Features and Technical Benefits

Self-Regulating Heating Technology

The heating output adjusts according to local temperature variations. As the temperature increases, the heating output generally decreases; as the temperature falls, the output increases. This allows different sections of the cable to respond to their individual thermal conditions.

Round Cable Design

The round geometry facilitates installation in suitable door seals, grooves, and profiles, particularly where space is limited or a conventional flat or rectangular cable profile is unsuitable.

Moisture Resistance

The ELSR-R is designed for moisture-resistant operation under the specified application conditions. Compatible connection kits, end terminations, junction boxes, and sealing components must be selected according to the installation environment.

UV Resistance

The cable offers resistance to ultraviolet radiation, making it suitable for applications where UV exposure is a relevant environmental consideration, within the manufacturer's specified limits.

Fluoropolymer Outer Jacket

The fluoropolymer outer jacket provides external protection under the specified operating conditions. Chemical compatibility and environmental suitability should be verified for the intended application.

Two Nominal Heating Outputs

The ELSR-R is available in variants rated at 19 W/m and 27 W/m at 10°C. The appropriate output should be selected according to the application's heating requirements and the manufacturer's technical data.

Suitable for Profile Installation

The round construction makes the ELSR-R particularly suitable for installation in compatible door profiles and sealing systems used in cold-storage facilities.

4. Cable Construction

The ELTHERM ELSR-R consists of several layers designed to provide electrical power distribution, heat generation, electrical insulation, and environmental protection.

1. Supply Bus Wires

The supply conductors are made of nickel-plated copper and distribute electrical power to the self-regulating heating element.

2. Self-Regulating Heating Element

The heating element changes its electrical resistance in response to temperature variations, allowing the local heat output to adjust according to thermal conditions.

3. Electrical Insulation

The insulation layer separates the internal electrical components and provides the required electrical insulation within the cable construction.

4. Protective Braid

The ELSR-R version identified as BOT features a protective braid made of tin-plated copper. The protective conductor arrangement and earthing requirements must be implemented according to the manufacturer's instructions for the exact cable configuration.

5. Outer Jacket

The outer jacket is made of fluoropolymer and provides protection against environmental influences within the specified operating conditions.

The complete cable construction, protective conductor connections, and compatible accessories should be verified against the official ELSR-R product documentation before installation.

5. Technical Specifications

The following table summarizes the principal technical specifications of the ELTHERM ELSR-R product family. The exact configuration and ratings should be verified against the manufacturer's official datasheet.

6. How Does the Self-Regulating Heating Cable Work?

The ELTHERM ELSR-R uses self-regulating heating technology to adjust its heat output in response to local temperature changes.

When the cable temperature decreases, the electrical resistance of the heating element generally decreases, allowing the cable to produce more heat. As the temperature rises, the resistance increases and the heating output decreases.

This operating principle enables different sections of the cable to generate different amounts of heat according to their local thermal conditions. It is particularly useful in applications where temperature variations occur along door seals, profiles, or cooling water lines.

Although self-regulating technology helps the cable respond to changing thermal requirements, it does not eliminate the need for correct electrical protection, suitable circuit design, proper installation, and compliance with the manufacturer's instructions.

7. Installation and System Design Considerations

Correct system design and installation are essential for reliable performance and safe operation.

Heating Requirement Assessment

Determine the heat requirement of the installation based on ambient temperature, required freeze protection, profile geometry, installation conditions, and potential heat losses.

Selection of Heating Output

Select the appropriate 19 W/m or 27 W/m variant according to the application's heating requirements and the manufacturer's output curves.

Heating Circuit Length

Determine the maximum permissible heating circuit length using the manufacturer's official tables. The permitted length depends on the start-up temperature, supply voltage, circuit-breaker rating, and electrical installation conditions.

Electrical Protection

Select suitable circuit breakers and residual-current protection in accordance with applicable electrical regulations and the manufacturer's requirements. Protective earthing must be implemented according to the approved cable configuration.

Bending Radius

The minimum bending radius is 30 mm. This limit must be observed to prevent mechanical damage during installation.

Minimum Installation Temperature

The minimum installation temperature is −30°C. Installation below this limit should not be undertaken unless expressly permitted by the manufacturer.

Compatible Connection Components

Use approved connection kits, end termination kits, junction boxes, cable entries, and sealing components compatible with the ELSR-R cable and the actual installation environment.

Inspection Before Commissioning

Inspect the cable, connections, protective arrangements, and installation condition before energizing the system. Perform the electrical tests required by the manufacturer's installation manual and applicable standards.

8. Compatible Accessories

The following accessories are identified for compatible ELSR-R installations. Suitability must be confirmed for the exact cable configuration and installation conditions.

Connection and Termination Kits

• ELVB-SRAM-25
• ELVB-SRAR-25
• ELVB-SRV-M

Junction Boxes

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

Depending on the project design, a complete heat tracing system may also require suitable mounting materials, electrical protection devices, insulation components, and temperature monitoring or control equipment.

Confirm the compatibility of each accessory with the selected ELSR-R variant, protective conductor arrangement, supply voltage, and environmental requirements before ordering.

9. Safety and Maintenance

Installation and electrical connection of the ELTHERM ELSR-R must be performed by qualified personnel in accordance with the manufacturer's instructions and applicable electrical regulations.

Before commissioning, verify the cable condition, connection integrity, protective earthing, insulation, and electrical protection devices. Periodic inspections should be carried out according to the installation environment and the maintenance requirements of the system.

Particular attention should be paid to the cable jacket, end terminations, junction boxes, and electrical connections. If the cable or its accessories become damaged, the system should be assessed by qualified personnel before further operation. Repairs and replacements must follow approved procedures.

The self-regulating characteristic does not replace appropriate electrical protection or correct system design. The specified temperature limits, maximum circuit lengths, and installation conditions must always be respected.

10. Why Choose the ELTHERM ELSR-R?

The ELTHERM ELSR-R is designed for specialized heat tracing applications where round cable geometry and effective freeze protection are important.

Its principal advantages include:

• Self-regulating heating technology that responds to local temperature changes.
• Round geometry for installation in suitable sealing systems and door profiles.
• Moisture-resistant construction.
• Resistance to ultraviolet radiation.
• Fluoropolymer outer jacket.
• Nominal heating outputs of 19 W/m and 27 W/m at 10°C.
• Suitability for freeze protection in cold-storage doors and seals.
• Application in selected cooling water lines in breweries and beverage production facilities.
• Compact installation characteristics for specialized industrial applications.

These features make the ELSR-R a practical option for applications that require a round self-regulating heat tracing cable and fall within the product's specified operating conditions.

11. Conclusion

The ELTHERM ELSR-R self-regulating heat tracing cable is a specialized low-temperature heating solution manufactured by eltherm GmbH in Germany. Its round design makes it particularly suitable for installation in compatible sealing systems, cold-storage door profiles, and selected cooling water lines in breweries and beverage production facilities.

With a nominal voltage of 230 V, maximum maintain temperature of +65°C, minimum installation temperature of −30°C, and minimum bending radius of 30 mm, the ELSR-R is designed for applications requiring compact installation and reliable freeze protection.

The cable's self-regulating heating technology, moisture-resistant construction, UV resistance, and fluoropolymer outer jacket provide important technical benefits for suitable industrial applications.

For successful system design, the heating output, maximum circuit length, electrical protection, installation conditions, and compatible accessories must be evaluated carefully.