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Heat Shrink Cable Accessories for Reliable Cable Termination

Heat shrink cable accessories provide electrical insulation, environmental sealing, stress control, and mechanical protection for power cables. The system uses radiation-crosslinked polymer components with a shape-memory effect: after heating during installation, the components recover toward their original dimensions to create a tight, durable seal. Our universal heat shrink termination system is suitable for indoor and outdoor applications and can be used with paper-insulated or polymeric-insulated cables.

What Are Heat Shrink Cable Accessories?

Heat shrink cable accessories are cable termination and jointing components manufactured from specially formulated rubber/polymer composite materials. The products are radiation-crosslinked, expanded after heating, and rapidly cooled to retain the expanded dimensions until installation.

Key parameter: The installation process relies on the material’s heat-activated shape-memory recovery.

How Does Heat Shrink Technology Work?

During manufacturing, the semi-finished component is heated and mechanically expanded before rapid cooling. When reheated during cable installation, the material recovers toward its original size and tightly conforms to the cable surface.

Key parameter: Heat is required during installation to activate dimensional recovery.

What Protection Does the System Provide?

The recovered insulation tubes create a close-fitting layer around the cable, while sealing materials prevent the ingress of moisture and contaminants. The resulting structure provides electrical insulation, sealing, and mechanical protection.

Key parameter: The system combines 3 primary protection functions: insulation, sealing, and mechanical protection.

How Is Cable Grounding Connected?

The system supports either soldered or solderless earth connections for connecting the cable’s metallic screen or armour to ground. For wire-screen cables, copper wires are embedded into sealing mastic to improve moisture sealing and help protect the connection against corrosion.

Key parameter: 2 earth-connection options are available: soldered and solderless.

How Is Moisture Sealing Achieved?

Hot-melt adhesive is incorporated inside the sealing tube and anti-tracking insulation tube. During installation, the adhesive softens and forms a close-fitting seal around the cable components.

Key parameter: The sealing system uses hot-melt adhesive as the primary environmental sealing material.

How Are 3-Core Cables Sealed?

For 3-core cables, an adhesive-coated breakout is installed over the cable cores and the end of the outer sheath. It seals and protects the cable crutch area, which is one of the most exposed areas of a multicore termination.

Key parameter: The breakout is designed specifically for 3-core cable termination.

How Does the System Control Electrical Stress?

A yellow stress-relief mastic is applied around the end of the cable screen cut. The stress-control tube and stress-relief mastic work together to redistribute the electrical field and reduce electrical stress concentration at the cable end.

Key parameter: The stress-control system uses 2 components: stress-control tube + stress-relief mastic.

How Does It Prevent Tracking and Erosion?

Anti-tracking insulation tubes and rain sheds are designed to resist electrical tracking and surface erosion. The rain sheds also increase the surface creepage distance, improving termination performance under demanding environmental conditions.

Key parameter: Rain sheds increase the termination’s surface creepage distance.

Are Heat Shrink Terminations Suitable for Indoor and Outdoor Use?

Yes. The system is designed as a universal termination solution for both indoor and outdoor cable applications, with sealing and anti-tracking components supporting operation in demanding service environments.

Key parameter: 2 installation environments: indoor and outdoor.

What Types of Cable Insulation Are Compatible?

The universal system can be applied to both paper-insulated cables and polymeric-insulated cables, subject to the applicable product size range and cable construction.

Key parameter: 2 major insulation types: paper and polymeric.

Key Features at a Glance

Feature Heat Shrink Cable Accessories

Main function Insulation, sealing, stress control, mechanical protection

Material technology Radiation-crosslinked polymer/rubber composite

Installation principle Heat-activated shape-memory recovery

Earth connection Soldered or solderless

Moisture sealing Hot-melt adhesive + sealing mastic

3-core cable protection Adhesive-coated breakout

Stress control Stress-control tube + stress-relief mastic

Surface protection Anti-tracking tubes + rain sheds

Application Indoor and outdoor

Cable insulation Paper or polymeric

FAQ

What is a heat shrink cable termination?

A heat shrink cable termination is an accessory used to insulate, seal, stress-control, and mechanically protect the end of a power cable. It uses heat-activated polymer recovery to form a tight fit around the cable.

What is the shape-memory effect in heat shrink products?

The shape-memory effect allows a radiation-crosslinked polymer component to recover toward its original dimensions when heated. This recovery creates close contact with the cable and helps establish insulation and sealing.

Are heat shrink cable accessories waterproof?

The sealing structure is designed to provide protection against moisture ingress using hot-melt adhesive and sealing mastic. Actual waterproofing performance depends on the complete cable accessory design, installation procedure, and applicable test standard.

Can heat shrink terminations be used outdoors?

Yes. Outdoor versions can incorporate anti-tracking insulation tubes and rain sheds to improve resistance to tracking and erosion while increasing surface creepage distance.

Can heat shrink accessories be used on 3-core cables?

Yes. A dedicated adhesive-coated breakout can seal and protect the crutch area of 3-core cables.

Can the cable screen be grounded without soldering?

Yes. The system can provide either soldered or solderless earth connections, depending on the cable construction and selected accessory configuration.

What cables can these accessories be used with?

The universal system is designed for both paper-insulated and polymeric-insulated cables, provided that the selected accessory matches the cable voltage, conductor size, insulation diameter, screen/armour construction, and installation requirements.

What information is needed to select the correct heat shrink cable accessory?

The key selection data normally include rated voltage, number of cores, conductor cross-section, insulation diameter, cable construction, screen/armour type, and indoor or outdoor installation environment.

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