کابل هیت تریس خودتنظیم‌شونده ال ترم ELSR-SH

ELTHERM ELSR-SH+ Self-Regulating Heating Cable

Manufacturer: eltherm GmbH, Germany

High-Temperature Industrial Heat Tracing for Demanding Environments

1. Product Overview

The ELTHERM ELSR-SH+ is a high-performance self-regulating electric heating cable developed for industrial heat tracing applications, including freeze protection and temperature maintenance in pipes, tanks, vessels, valves, pumps, and process equipment. Manufactured by German heating technology specialist eltherm GmbH, this cable is designed for demanding operating conditions where reliable heat delivery, chemical resistance, and high-temperature performance are essential.

Thanks to its self-regulating technology, the heating cable automatically adjusts its heat output in response to local temperature changes along its length. This characteristic helps provide heat where required and reduces heat output as the cable temperature increases.

The ELSR-SH+ is particularly suitable for evaluating industrial applications where exposure to chemicals, oils, and fuels may occur. Its moisture-resistant design and suitability for approved hazardous-area applications make it a potential solution for selected heat tracing systems in the oil and gas, chemical, and petrochemical industries.

With a maximum maintain temperature of 165°C and a maximum exposure temperature of 250°C when de-energized, the ELSR-SH+ is designed for applications requiring high-temperature capability. Correct product selection must always be based on the operating conditions and the manufacturer's technical specifications.

2. Key Features and Benefits

Self-Regulating Heating Technology

The cable adjusts its heat output according to local temperature variations along its length. Heat output generally increases as the local temperature decreases and decreases as the temperature rises, helping the system respond to changing thermal conditions.

High Chemical Resistance

The ELSR-SH+ is designed for demanding industrial environments involving potential exposure to chemicals, oils, and fuels. Compatibility must be confirmed for the specific substances, concentrations, temperatures, and exposure conditions.

High-Temperature Capability

The specified maximum maintain temperature is 165°C. The maximum exposure temperature is 250°C in the de-energized condition, subject to the applicable manufacturer's specifications. These ratings describe different operating conditions and must not be used interchangeably.

Moisture-Resistant Design

The cable is intended for industrial environments within its specified protection limits. The complete installation, including connections, terminations, and junction boxes, must be suitable for the expected moisture and environmental conditions.

Hazardous-Area Applications

The ELSR-SH+ may be considered for approved hazardous-area installations when the selected cable, accessories, electrical protection, and installation method comply with the applicable certifications and site requirements.

Multiple Heating Output Options

The product family offers five nominal heat output options to accommodate different heat-tracing requirements. The appropriate version must be selected using the manufacturer's power-output data and engineering calculations.

Flexible Installation

The specified minimum bending radius is 25 mm, subject to confirmation against the current technical documentation and installation instructions for the exact cable version. The cable must not be subjected to damaging mechanical stress.

3. Applications of the ELSR-SH+ Heating Cable

The ELTHERM ELSR-SH+ can be considered for a range of industrial heat-tracing applications requiring freeze protection, process temperature maintenance, or compensation for heat losses. Suitability depends on the cable version, process conditions, thermal requirements, chemical exposure, and applicable installation approvals.

Freeze Protection of Pipes

The heating cable helps prevent liquids from freezing in pipelines exposed to low ambient temperatures. The appropriate cable output is determined according to pipe dimensions, insulation properties, minimum ambient temperature, required maintenance temperature, and calculated heat losses.

Process Temperature Maintenance

The ELSR-SH+ can be evaluated for maintaining the required temperature of process fluids during transportation through industrial pipelines. Properly designed heat tracing compensates for heat losses and helps support stable process operation.

Oil and Gas Industry

The cable may be considered for suitable oil and gas facilities, including process lines and associated equipment, provided that its temperature ratings, electrical characteristics, chemical compatibility, and hazardous-area approvals meet the project requirements.

Chemical and Petrochemical Industries

Its high chemical resistance makes the ELSR-SH+ a candidate for selected installations where heating cables may be exposed to industrial chemicals, oils, or fuels. Compatibility must be verified for the actual substances and operating conditions before specification.

Tanks, Vessels, and Storage Equipment

The cable can be evaluated for appropriately designed heating systems involving tanks, vessels, and storage equipment that require freeze protection or process temperature maintenance. Installation arrangements must meet the equipment's thermal and mechanical requirements.

Valves and Pumps

Localized heat tracing may be required for valves, pumps, and process components that are vulnerable to freezing or excessive heat loss. The cable layout and heating capacity must be determined according to component geometry, thermal requirements, and manufacturer instructions.

4. How Does Self-Regulating Heating Technology Work?

The ELTHERM ELSR-SH+ uses a temperature-dependent heating element whose electrical resistance changes as its temperature varies. This enables the cable's heat output to respond to local thermal conditions along its length.

When the local temperature decreases, heat output generally increases. As the temperature rises, heat output generally decreases. This behavior helps the heating system respond to changing heat losses along the traced equipment.

The self-regulating design allows different sections of the cable to respond to their local thermal conditions. However, actual performance depends on the selected cable version, supply voltage, installation arrangement, insulation, and operating environment.

Self-regulation does not eliminate the need for proper engineering calculations. Heat loss, cable selection, circuit length, starting current, electrical protection, insulation, and any required temperature control must be evaluated before installation.

5. Technical Specifications

The following table summarizes the principal technical information provided for the ELTHERM ELSR-SH+ product family. Specifications and electrical design limits must be verified against the current official manufacturer documentation for the exact cable version.

6. Temperature Performance

Maximum Maintain Temperature

The stated maximum maintain temperature for the ELSR-SH+ is 165°C. This is the specified upper maintain-temperature rating and must be observed when designing a continuous heat-tracing system.

Maximum Exposure Temperature

The stated maximum exposure temperature is 250°C when the cable is de-energized. This rating describes a permitted exposure condition and must not be interpreted as the normal operating temperature or continuous energized maintain temperature.

Minimum Installation Temperature

The stated minimum installation temperature is −60°C. Installation must follow the manufacturer's handling requirements and any restrictions applicable to the selected cable version.

These temperature ratings describe different operating conditions. The correct limits must be applied during cable selection, process design, installation, and commissioning.

7. Electrical Supply and Heat Output Selection

The ELSR-SH+ product family is specified for nominal supply voltages of 120 VAC and 230 VAC. The correct version must be selected according to the available electrical supply and the project's heating requirements.

The product is offered in five nominal heat output options. The appropriate output should be determined from the required maintain temperature, minimum ambient temperature, calculated heat loss, pipe or equipment dimensions, insulation properties, and circuit design.

Nominal heat output must be interpreted using the manufacturer's specified reference conditions and power-output curves. It should not be assumed that the cable delivers the same output per metre under all temperatures and installation conditions.

Maximum circuit length, starting current, overcurrent protection ratings, and other electrical design parameters must be established using the manufacturer's documentation for the exact product configuration.

8. Installation and System Design Considerations

Correct system design and installation are essential for reliable heat tracing, freeze protection, and temperature maintenance. The ELTHERM ELSR-SH+ should be selected only after evaluating the application, required heating capacity, process conditions, electrical supply, and environmental exposure.

Heat Loss Calculations

Determine the required heating output according to pipe or equipment dimensions, insulation thickness, minimum ambient temperature, target maintain temperature, and expected heat losses. The selected cable must provide sufficient heating capacity for the specified design conditions.

Cable Selection and Power Output

Select the appropriate ELSR-SH+ version using the manufacturer's official power-output curves and technical data. The nominal heating output, supply voltage, process temperature, and expected environmental conditions must all be considered when sizing the system.

Cable Layout and Installation Method

Determine the cable routing, spacing, attachment method, and number of cable runs according to the required heating output and equipment geometry. Follow the manufacturer's installation instructions and avoid cable crossings or overlaps unless explicitly permitted.

Thermal Insulation

Appropriate thermal insulation reduces heat losses and supports effective heat-tracing performance. The insulation material must be suitable for the operating temperature and environment. Weatherproofing should also be considered to minimize moisture ingress where applicable.

Maximum Heating Circuit Length

Determine the permissible heating circuit length from the manufacturer's official design tables. Maximum circuit length can depend on cable version, supply voltage, start-up temperature, protective device rating, and installation conditions. It must not be estimated from nominal wattage alone.

Electrical Protection

Provide suitable overcurrent protection, protective earthing, and residual-current protection where required. Circuit design must account for starting current, steady-state current, circuit length, supply voltage, and applicable electrical regulations.

Minimum Bending Radius

Observe the specified minimum bending radius of 25 mm, subject to confirmation against the official documentation for the selected cable version. Avoid twisting, crushing, stretching, or otherwise damaging the heating cable during installation.

Minimum Installation Temperature

The stated minimum installation temperature is −60°C. Confirm this rating against the current manufacturer documentation and follow the applicable cable-handling instructions to preserve the integrity of the cable construction.

Chemical Compatibility

Although the ELSR-SH+ is designed for high chemical resistance, compatibility must be verified for the actual process environment. Consider chemical concentration, operating temperature, exposure duration, cleaning agents, and possible contamination before specifying the cable.

Temperature Control and Monitoring

Select a suitable temperature-control strategy according to the process requirements. Depending on the application, temperature sensors, controllers, contactors, alarms, and monitoring equipment may be required to maintain the target temperature and supervise system operation.

Inspection Before Commissioning

Inspect the cable, outer jacket, connections, terminations, junction boxes, insulation, and protective devices before energizing the system. Perform the electrical tests and commissioning procedures specified by the manufacturer and applicable standards.

9. Chemical and Environmental Compatibility

The ELSR-SH+ is intended for demanding industrial environments where exposure to chemicals, oils, and fuels may occur. Its chemical resistance makes it a potential option for selected applications, but suitability depends on the specific materials and operating conditions.

Chemical compatibility must be checked against the actual substance, concentration, exposure temperature, and contact duration. Cleaning agents, process residues, and intermittent chemical exposure should also be considered.

The suitability of the complete heating system must be verified, including the heating cable, connection kits, end terminations, cable glands, junction boxes, mounting materials, and other installation components.

Moisture resistance and environmental protection must be evaluated according to the manufacturer's specified limits. Appropriate sealing, insulation protection, and installation practices are essential where moisture or contamination could affect the system.

10. Hazardous-Area Installation Requirements

For installations in potentially explosive atmospheres, the selected cable and all associated components must have the approvals required for the classified area and intended operating conditions.

The complete system must comply with the applicable hazardous-area classification, temperature requirements, electrical protection measures, installation standards, and manufacturer instructions. The suitability of the heating cable alone does not establish compliance of the complete installation.

Before installation, verify the required product certifications, accessory approvals, connection arrangements, temperature limitations, and protective measures against the project documentation and applicable regulations.

11. Compatible Accessories and Installation Components

A complete ELTHERM ELSR-SH+ heat-tracing system requires suitable electrical connections, termination components, junction boxes, mounting materials, and protective devices. Depending on the application, temperature sensors and control equipment may also be required.

All accessories must be compatible with the selected ELSR-SH+ cable version, electrical supply, operating temperature, environmental conditions, and applicable installation approvals. The following product families and models are potential accessory options identified for evaluation; compatibility must be confirmed against the current manufacturer documentation.

Connection and Termination Kits

• Ex-Con SR
• ELVB-SREx-SH+-20
• ELVB-SREx-25
• EL-ECSH-Ex
• Ex-It-L /-S
• ELVB-SREx-IT
• ELVB-SRA-25
• ELVB-SRV-H

Connection and termination kits must provide suitable electrical insulation, mechanical protection, and environmental sealing. Confirm that each kit is approved for the exact cable construction and intended installation.

Junction Boxes

• 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 boxes must have suitable electrical ratings, ingress protection, cable entries, and environmental resistance. For hazardous-area installations, the selected junction box and associated components must have the required approvals for the classified area.

Mounting and Fixing Materials

Suitable mounting materials may be required to secure the cable to pipes, tanks, vessels, and other approved surfaces. Fixing methods must not damage the cable or compromise its protective construction. Materials must also be compatible with the process temperature and surrounding environment.

Electrical Protection Equipment

Depending on the installation, circuit breakers, residual-current protection, protective conductors, contactors, and other electrical components may be required. All devices must be selected according to the manufacturer's design instructions and applicable electrical regulations.

Temperature Sensors and Controllers

Temperature sensors and controllers may be incorporated into the system to monitor the protected equipment and manage operation. Sensor placement, control settings, and monitoring requirements should reflect the process conditions and thermal characteristics of the installation.

12. Installation and Safety Recommendations

Correct installation is essential for reliable and safe heat-tracing operation. All system design and installation work must comply with the manufacturer's instructions and applicable electrical and industrial safety regulations.

Perform Heat Loss Calculations

Determine the heating requirements using equipment dimensions, insulation characteristics, minimum ambient temperature, target maintain temperature, and calculated heat losses.

Verify Electrical Compatibility

Match the cable voltage rating to the available electrical supply. Confirm circuit length, starting current, steady-state current, and protective device ratings using the manufacturer's design documentation.

Observe the Minimum Bending Radius

Maintain a bending radius of at least 25 mm, subject to confirmation against the official documentation for the selected cable version. Avoid mechanical stress and damage during handling and installation.

Check Chemical Compatibility

Confirm that the heating cable, connections, junction boxes, and associated materials are suitable for the chemicals and environmental conditions present at the installation site.

Select Appropriate Electrical Protection

Provide suitable overcurrent protection, grounding, residual-current protection where required, and other protective measures according to the system design and applicable regulations.

Verify Hazardous-Area Approvals

For potentially explosive atmospheres, ensure that the complete installation meets the required certification, temperature classification, and area classification.

Inspect Before Energizing

Check the heating cable, connections, end terminations, protective conductors, insulation, junction boxes, and protective devices before commissioning. Complete the required electrical tests according to the manufacturer's instructions.

Maximum circuit length, starting current, fuse ratings, and other electrical design parameters must be determined using the manufacturer's current documentation for the exact product configuration.

13. Why Choose the ELTHERM ELSR-SH+?

The ELTHERM ELSR-SH+ combines self-regulating heating technology with high chemical resistance and high-temperature capability for demanding industrial heat-tracing applications.

Its principal advantages include:

• Self-regulating heat output that responds to local temperature variations.
• Designed for industrial freeze protection and process temperature maintenance.
• High chemical resistance for suitable industrial environments, subject to material compatibility.
• Maximum maintain temperature of 165°C.
• Maximum de-energized exposure temperature of 250°C.
• Five nominal heat output options for different heating requirements.
• Specified minimum bending radius of 25 mm.
• Moisture-resistant design within the product's specified protection limits.
• Potential suitability for approved hazardous-area installations.
• Applications involving pipes, tanks, vessels, valves, pumps, and process equipment.
• Temperature-responsive heating performance along the installed cable.
• Integration into appropriately engineered industrial heat-tracing systems.

These characteristics make the ELSR-SH+ a product worth considering for industrial heat-tracing projects in the oil and gas, chemical, petrochemical, and process industries, provided that the selected cable version and complete installation meet the applicable technical and safety requirements.

14. Conclusion

The ELTHERM ELSR-SH+ self-regulating heating cable is designed for demanding industrial applications requiring freeze protection, temperature maintenance, and resistance to challenging environmental conditions.

With its self-regulating heating technology, high chemical resistance, and high-temperature ratings, the ELSR-SH+ offers a flexible option for appropriately engineered heat-tracing systems involving pipes, tanks, vessels, valves, pumps, and other compatible process equipment.

The product's temperature-responsive heat output helps the system adapt to local thermal conditions. Its high-temperature capability makes it a candidate for applications that require a higher maintain temperature than conventional freeze-protection systems, subject to the specified product ratings.

Selecting the correct cable version, nominal heat output, electrical protection, accessories, and installation method is essential to achieving safe and reliable operation. Heat-loss calculations, circuit design, chemical compatibility, temperature control, and environmental conditions must be evaluated before installation.

Before purchasing or installing the product, verify all technical ratings, circuit limitations, starting current, fuse ratings, approved accessories, and hazardous-area requirements against the manufacturer's current documentation for the exact ELSR-SH+ version.

All installation, electrical connection, commissioning, and system design work should be carried out by qualified personnel in accordance with the manufacturer's instructions and applicable electrical and industrial safety regulations.