کابل هیت تریس خودتنظیم‌شونده ال ترم ELSR-LS

ELTHERM ELSR-LS 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-LS is a self-regulating electric heating cable designed for low-temperature heating applications. It provides a flexible solution for industrial heat tracing systems requiring freeze protection and temperature maintenance.

The cable can be cut to the required length directly from the reel, allowing it to be adapted to specific installation requirements. Its compact construction, moisture-resistant properties, and UV resistance make it suitable for a range of industrial heating applications.

The ELSR-LS is available in two construction variants, AO and BO, and three nominal heating output options: 10 W/m, 15 W/m, and 25 W/m at 10°C. The cable is designed for a nominal supply voltage of 230 V.

With its compact dimensions and compatibility with designated connection kits, termination accessories, and junction boxes, the ELSR-LS offers a practical solution for industrial electric heat tracing installations.

2. Applications

The ELTHERM ELSR-LS self-regulating heating cable is designed for low-temperature industrial heat tracing applications, including:

• Freeze Protection: Helps prevent freezing in pipes and associated systems exposed to low ambient temperatures.
• Temperature Maintenance: Supports the maintenance of required temperatures in insulated pipelines and suitable process installations.
• Industrial Pipelines: Provides electric heat tracing for suitable pipelines and fluid transfer systems.
• Industrial Heating: Supports heating requirements in industrial facilities and process systems.
• Chemical and Petrochemical Industries: Can be considered for suitable applications within these sectors, subject to the product's technical limitations and installation requirements.
• Maritime and Offshore Installations: May be used in suitable applications where its documented ratings and environmental resistance meet project requirements.
• Food Processing: Can be considered for appropriate heating applications where the cable construction and installation comply with applicable requirements.
• Water and Sanitation Utilities: Supports suitable pipeline freeze-protection and temperature-maintenance applications.
• Special Heating Solutions: Can be integrated into customized heat tracing systems according to project-specific requirements.

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 electric heating technology.
• Designed for low-temperature industrial heat tracing.
• Three nominal heating output options: 10 W/m, 15 W/m, and 25 W/m at 10°C.
• Nominal supply voltage of 230 V.
• Maximum continuous exposure temperature of +65°C when energized.
• Maximum intermittent exposure temperature of +80°C when de-energized, for up to 1,000 hours.
• Minimum installation temperature of −60°C.
• Minimum bending radius of 25 mm.
• Moisture-resistant construction.
• UV-resistant design.
• Compact dimensions for installation in space-constrained areas.
• Can be cut to the required length directly from the reel.
• Two construction variants: AO and BO.
• Different cable dimensions and weights depending on the selected construction.
• Compatible with designated manufacturer-listed connection and termination accessories.
• Suitable for freeze protection and temperature maintenance in appropriate industrial applications.

4. Technical Specifications

The following technical specifications describe the ELSR-LS product family. Confirm the ratings for the exact cable designation and application against the manufacturer's technical documentation.

5. Cable Designs and Dimensions

The ELSR-LS is available in two construction variants, AO and BO. These variants have different cable dimensions and approximate weights. The nominal heating output is specified at a reference temperature of 10°C.

The BO and AO variants should be selected according to the required cable construction, installation arrangement, and applicable technical requirements. Dimensions and weights are approximate and should be confirmed against the relevant manufacturer documentation.

6. Cable Construction

The ELSR-LS incorporates a self-regulating heating element surrounded by electrical insulation and protective layers. Depending on the selected construction, the cable includes metallic conductors, a protective braid, and an outer jacket designed for the intended application.

The principal construction components include:

• Bus Wires: Nickel-plated copper bus wires with a cross-sectional area of 1.23 mm².
• Heating Element: A self-regulating element that adjusts its heating characteristics according to local temperature conditions.
• Electrical Insulation: Provides electrical separation within the cable construction.
• Protective Braid: Tinned copper braid in the applicable configuration.
• Outer Jacket: TPE-O outer jacket, depending on the selected construction.
• Protective Conductor: Protective conductor arrangements depend on the applicable cable design and installation configuration.

The exact layer arrangement and construction details should be verified against the technical documentation for the selected AO or BO model.

7. How Self-Regulating Heating Technology Works

The ELSR-LS uses self-regulating heating technology. The electrical characteristics of its heating element change with local temperature conditions, allowing the heat output to respond to temperature variations along the heated surface.

This behavior makes the cable suitable for industrial heat tracing applications where the thermal demand can vary along a pipeline or installation. The available nominal output options allow the product to be selected according to the heating requirements of the application.

Self-regulating operation does not eliminate the need for correct electrical protection, suitable circuit design, or compliance with the manufacturer's installation instructions. The appropriate cable output and circuit length must be determined using the relevant technical data and actual installation conditions.

8. Installation and Heating Circuit Design

The ELSR-LS is intended for installation on suitable insulated metallic pipes in accordance with EN 62395-1. Its minimum installation temperature is −60°C, and the minimum bending radius is 25 mm.

The maximum permissible heating circuit length depends on several factors, including:

• Selected nominal heating output.
• Switch-on temperature.
• Supply voltage.
• Circuit breaker rating and characteristics.
• Startup current and cable electrical characteristics.
• Permissible voltage drop along the heating cable bus wires.
• Installation conditions and circuit configuration.

The manufacturer's technical data provides heating circuit length tables based on a nominal voltage of 230 V, delayed-action circuit breakers with a C characteristic operated at a maximum of 80% load, a maximum voltage drop of 10% along the heating cable bus wires, and a power connection at one end of the cable.

Actual circuit lengths must be selected from the applicable manufacturer's tables. They should not be estimated solely from the nominal heating output or cable length.

The installation must also comply with the applicable electrical regulations and the manufacturer's requirements for cable fixing, termination, connection, insulation, and circuit protection.

9. Compatible Connection and Termination Accessories

The ELSR-LS product page identifies a range of connection and termination accessories for use with the heating cable system. These accessories support cable connection, termination, splicing, and integration into suitable heat tracing installations.

The manufacturer-listed accessory families include:

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

The exact accessory selection depends on the cable construction, installation arrangement, electrical requirements, and environmental conditions. Not every accessory is necessarily suitable for every cable version or application.

10. Compatible Junction Boxes

The manufacturer also lists junction-box families for integration into suitable ELSR-LS heating installations.

• 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 take into account the cable configuration, electrical ratings, enclosure protection, installation conditions, and applicable approval requirements. Where a hazardous-area installation is involved, all components must be suitable for the relevant area classification and approved system configuration.

11. Approvals and Technical Documentation

The manufacturer's product page provides access to technical information and approval-related documentation associated with the ELSR-LS product and relevant system configurations.

The English technical documentation identifies ATEX and UKEX certification references for applicable configurations. The scope and validity of each approval must be verified against the exact product designation, installation arrangement, and intended operating environment.

The presence of a certificate associated with a product family does not necessarily mean that every cable version, accessory, or system configuration is covered by that approval. The relevant documents should be reviewed before specifying the product for a particular project.

12. Installation and Engineering Considerations

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

• Required Process Temperature: Establish the required maintenance temperature and the maximum permitted temperature of the heated equipment.
• Heat-Loss Calculations: Consider pipe dimensions, insulation thickness, ambient temperature, and environmental conditions.
• Nominal Heating Output: Select the appropriate output option using the calculated heating demand and the manufacturer's performance data.
• Electrical Circuit Design: Verify supply voltage, circuit length, startup current, voltage drop, and protective device ratings.
• Minimum Bending Radius: Observe the specified minimum bending radius of 25 mm.
• Cable Construction: Select the AO or BO version according to the required configuration and documented technical characteristics.
• Accessory Compatibility: Verify the suitability of connection kits, termination components, and junction boxes for the selected cable.
• Environmental Conditions: Evaluate moisture exposure, ultraviolet exposure, ambient temperatures, and other relevant installation conditions.
• Technical Documentation: Review the applicable datasheet, installation instructions, and approval documents before commissioning.

The self-regulating characteristics of the cable do not eliminate the need for suitable overcurrent protection, appropriate residual-current or earth-fault protection where required, and compliance with the applicable electrical installation requirements.

13. Safety and Maintenance

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

Inspection and maintenance should follow the manufacturer's instructions and applicable site safety procedures. Particular attention should be paid to the condition of the heating cable, electrical connections, terminations, enclosure integrity, 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 applicable electrical safety requirements.

Operating limits must be observed throughout the service life of the heating system. The cable must not be operated outside its specified temperature, voltage, circuit-length, or environmental limitations.

14. Product Summary

The ELTHERM ELSR-LS self-regulating heating cable is a compact electric heat tracing solution designed for low-temperature industrial applications. With nominal heating outputs of 10 W/m, 15 W/m, and 25 W/m at 10°C, a nominal supply voltage of 230 V, and a flexible cable-length configuration, it is suitable for consideration in freeze protection and temperature-maintenance systems.

Its moisture-resistant and UV-resistant construction, compact dimensions, and availability in AO and BO variants support a range of industrial installation requirements. The product can be integrated with designated connection and termination accessories and compatible junction boxes, subject to verification of the applicable technical specifications.

The ELSR-LS is intended for applications requiring reliable thermal management within its specified operating limits. Appropriate cable selection, heat-loss calculations, electrical circuit design, accessory compatibility, and adherence to the manufacturer's installation instructions are essential for a suitable and safe installation.