کابل هیت تریس خودتنظیم‌شونده ال ترم ELSR-N

ELTHERM ELSR-N Self-Regulating Heating Cable

Manufacturer: eltherm GmbH, Germany

Self-Regulating Electric Heat Tracing Cable for Industrial Freeze Protection and Temperature Maintenance

1. Product Overview

The ELTHERM ELSR-N is a self-regulating electric heating cable designed for freeze protection and temperature maintenance in low-temperature industrial applications. Its self-regulating heating technology adjusts heat output according to local temperature conditions, making it suitable for a wide range of industrial heat tracing systems.

The ELSR-N is designed for use on pipelines, tanks, vessels, silos, and other industrial equipment where reliable thermal protection is required. It is also available for applications in potentially explosive atmospheres, subject to the applicable product approvals, installation requirements, and system configuration.

The product is available in three versions: AO, BO, and BOT. The BOT version provides resistance to aggressive chemicals, oil, and gasoline, making it a suitable option for applications requiring enhanced chemical resistance.

With four nominal heating output options, UV resistance, moisture resistance, and compatibility with a range of connection and termination kits and junction boxes, the ELSR-N offers a flexible solution for industrial electric heat tracing.

2. Applications

The ELTHERM ELSR-N self-regulating heating cable is designed for a variety of industrial heat tracing applications, including:

• Freeze Protection: Helps protect pipelines and industrial equipment against freezing under low-temperature conditions.
• Temperature Maintenance: Maintains the required temperature of process lines and industrial equipment.
• Industrial Pipelines: Provides electric heat tracing for pipelines and fluid transfer systems.
• Silos, Vessels, and Tanks: Supports temperature maintenance and thermal protection for storage and process equipment.
• Industrial Applications: Suitable for various industrial heating and heat tracing requirements.
• Special Heating Solutions: Can be considered for customized heat tracing systems according to project-specific requirements.
• Potentially Explosive Atmospheres: Approved configurations may be used in hazardous areas within the scope of their applicable certifications.

The suitability of the cable for a specific application depends on the required heating output, process temperature, heat-loss calculations, electrical design, installation conditions, environmental exposure, and applicable safety requirements.

3. Key Features and Benefits

• Self-regulating heating technology that adjusts heat output according to local temperature conditions.
• Designed for industrial freeze protection and temperature maintenance.
• Four nominal heating output options for application-specific selection.
• Nominal supply voltage of 230 V.
• Maximum continuous maintain temperature of +65°C.
• Maximum exposure temperature of +80°C when de-energized.
• Minimum installation temperature of −60°C.
• UV-resistant construction for applications involving ultraviolet exposure.
• Moisture-resistant design for industrial heat tracing installations.
• Three available versions: AO, BO, and BOT.
• Enhanced chemical resistance offered by the BOT version.
• BOT version resistant to aggressive chemicals, oil, and gasoline, subject to application-specific compatibility verification.
• Product approvals available for specified applications in potentially explosive atmospheres.
• Compatibility with a range of manufacturer-listed connection and termination kits.
• Compatibility with selected ELAK and Ex-It junction boxes.
• Supporting technical documentation, installation manuals, and product approval documents provided by the manufacturer.

4. Technical Specifications

The following specifications are based on the supplied ELSR-N product information. The exact ratings, operating limits, and approval conditions must be verified against the current official manufacturer datasheet for the selected product version.

5. How Self-Regulating Heating Technology Works

The ELTHERM ELSR-N uses self-regulating heating technology to adjust its heat output according to local temperature conditions. This characteristic allows the cable to respond to temperature variations along the heated surface.

As local temperatures change, the heating characteristics of the self-regulating element change accordingly. This helps the cable accommodate variations in heat demand along a pipeline or piece of equipment.

Self-regulating operation does not eliminate the need for appropriate electrical protection, correct circuit design, or compliance with the manufacturer's installation instructions. Circuit lengths, startup current, protective devices, and operating limits must be evaluated for the selected cable configuration.

The final heating system should be designed according to the required process temperature, calculated heat losses, insulation characteristics, ambient conditions, and electrical supply requirements.

6. Product Versions: AO, BO, and BOT

The ELSR-N product family is available in three versions: AO, BO, and BOT. The appropriate version should be selected according to the environmental conditions, required heating performance, chemical exposure, and technical requirements of the application.

6.1. ELSR-N AO

The AO version is one of the configurations available in the ELSR-N product family. Its specific electrical characteristics, nominal heating output, approvals, and installation requirements should be confirmed using the relevant manufacturer documentation.

Before selecting this version, verify that its documented characteristics meet the heating demand and environmental requirements of the intended installation.

6.2. ELSR-N BO

The BO version is another configuration of the ELSR-N self-regulating heating cable family. Its suitability depends on the required heating output, operating conditions, electrical circuit design, and the specifications of the exact product model.

The applicable datasheet should be consulted to confirm the relevant ratings and installation limitations.

6.3. ELSR-N BOT

The BOT version is intended for applications requiring enhanced chemical resistance. According to the supplied product information, this version is resistant to aggressive chemicals, oil, and gasoline.

Before installation, chemical compatibility must be verified for the specific substance, concentration, operating temperature, exposure duration, and environmental conditions. General chemical-resistance statements should not be interpreted as universal compatibility with every chemical.

7. Compatible Connection and Termination Kits

The ELTHERM ELSR-N is compatible with a range of manufacturer-listed connection and termination kits. The appropriate kit must be selected according to the cable version, electrical requirements, installation environment, and applicable approvals.

• Ex-Con SR
• ELVB-SRAN-Ex-20
• ELVB-SREx-25
• EL-ECN-Ex
• Ex-It-L / -S
• El-Clic
• ELVB-SREx-IT
• ELVB-SRA-25
• ELVB-SRV-N-LS-W

Not every connection kit is suitable for every cable configuration or hazardous-area installation. Compatibility should be confirmed using the manufacturer's accessory documentation and the requirements of the complete heating system.

8. Compatible Junction Boxes

The manufacturer lists a range of junction boxes for use with the ELSR-N product family. Depending on the application, the compatible options include:

• ELAK-Ex 2.00
• ELAK-Ex R5
• ELAK-Ex R7
• Ex-It-R
• Ex-It-R-T
• ELAK-2
• ELAK-5
• ELAK-5.1
• ELAK-5.7
• ELAK-R7
• ELAK-RS
• ELAK-RS-T

Junction box selection must account for the cable configuration, number of circuits, electrical ratings, ambient conditions, enclosure protection, and hazardous-area requirements where applicable.

For installations in potentially explosive atmospheres, the junction box, cable connection components, and other electrical equipment must have the appropriate approvals for the intended area classification.

9. Approvals and Technical Documentation

The manufacturer provides technical documentation and approval-related materials for the ELSR-N product family. These documents support the evaluation of product compliance and suitability for specific industrial and hazardous-area applications.

Available documentation includes:

• ELSR product and system declarations of conformity.
• ABS certificate documentation.
• Approvals relating to heating systems used in potentially explosive atmospheres.
• Type Approval certificates.
• DNV documentation.
• Certificates of conformity for explosion-protected applications.
• IECEx certificates.
• VDE approvals covering the AO, BO, and BOT versions, as applicable.
• ATEX-related product documentation.
• ELSR-N system approval documents.

The validity, scope, and applicability of each certificate must be verified against the exact product version and intended installation. The availability of a certificate for the product family does not necessarily mean that every configuration or accessory combination is covered by that approval.

For hazardous-area installations, the complete heating system—including the heating cable, connection and termination kits, junction boxes, electrical protection, and installation method—must satisfy the applicable requirements.

10. Datasheets and Installation Manuals

The official ELTHERM product page provides access to technical documentation intended to support product selection, system design, installation, and verification of the applicable operating limits.

The listed documentation includes:

• ELSR-N datasheet in German.
• ELSR-N datasheet in English.
• ELSR-Ex installation manual in German.
• ELSR and ELP installation manual in German.
• ELSR system overview in German.
• ELSR system overview in English.

For technical planning and installation, consult the latest documentation applicable to the selected cable version and project requirements.

Official product page: ELTHERM ELSR-N Self-Regulating Heating Cable

11. ELTHERM Designer: Heat Tracing Design Tool

ELTHERM also provides the ELTHERM Designer, a tool intended to support the design of industrial heat tracing systems. It helps users calculate heat losses for insulated and jacketed pipelines and vessels and manage heat tracing requirements within industrial projects.

The tool can support engineers in assessing thermal requirements and planning appropriate heating solutions. Final cable selection must still be verified against the manufacturer's technical specifications, electrical design requirements, installation conditions, and applicable safety standards.

12. Installation and Engineering Considerations

Correct cable selection and installation are essential to achieving the required thermal performance and ensuring electrical safety. The following factors should be considered when designing an ELSR-N heat tracing system:

• Required Process Temperature: Determine the required maintenance temperature and the maximum permitted temperature of the heated equipment.
• Heat-Loss Calculations: Consider pipe or vessel dimensions, insulation thickness, ambient temperature, and environmental conditions.
• Nominal Heating Output: Select the appropriate output option based on the calculated heating demand and the manufacturer's performance data.
• Electrical Circuit Design: Verify supply voltage, circuit length, startup current, and protective device ratings using the manufacturer's documentation.
• Minimum Bending Radius: Observe the specified minimum bending radius of 25 mm and all other applicable installation instructions.
• Cable Version: Select AO, BO, or BOT according to the application requirements and documented product characteristics.
• Chemical Compatibility: For chemical applications, verify compatibility with the actual substance and operating conditions, particularly when selecting the BOT version.
• Accessory Compatibility: Ensure that connection kits, termination components, and junction boxes are approved and suitable for the selected cable and installation environment.
• Hazardous-Area Requirements: Verify the applicable certificates and installation conditions for the complete system where explosive atmospheres may be present.
• Technical Documentation: Review the relevant datasheet, installation manual, and approval documents before commissioning.

Self-regulating operation does not replace the need for appropriate overcurrent protection, suitable residual-current or earth-fault protection where required, correct electrical installation, and compliance with the manufacturer's instructions.

13. Safety and Maintenance

Before commissioning, verify that the heating cable, electrical connections, connection kits, junction boxes, circuit protection, and temperature-control equipment meet the project requirements.

Inspection and maintenance activities should follow the manufacturer's instructions and the applicable site safety procedures. Particular attention should be paid to electrical connections, enclosure integrity, cable condition, insulation, and protective devices.

Any damaged cable or accessory should be evaluated by suitably qualified personnel. Repair or replacement must follow the manufacturer's approved procedures and relevant electrical safety requirements.

For potentially explosive atmospheres, verify that the product version, accessories, installation method, and complete heating system comply with the applicable certification and hazardous-area classification. Do not assume that approval for one configuration automatically covers another.

14. Conclusion

The ELTHERM ELSR-N self-regulating heating cable is an industrial heat tracing solution designed for freeze protection and temperature maintenance in low-temperature applications. Its self-regulating technology, nominal voltage of 230 V, four nominal heating output options, UV resistance, and moisture resistance make it suitable for consideration in a variety of industrial heating systems.

Available in AO, BO, and BOT versions, the ELSR-N product family offers configuration options for different application requirements. The BOT version is particularly relevant for applications requiring resistance to aggressive chemicals, oil, and gasoline, subject to verification of compatibility with the actual operating environment.

Compatibility with a range of connection and termination kits and junction boxes, together with the manufacturer's technical documentation and product approvals, supports the design and implementation of industrial heat tracing systems.

For correct product selection, engineers should verify the required heating output, operating temperature, installation conditions, electrical protection, accessory compatibility, and applicable approvals against the official manufacturer documentation.