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Cold shrink cable accessories
Cold shrink cable accessories
Cold shrink cable accessories are components formed by injecting liquid silicone rubber and vulcanizing it in a factory, then expanding it and adding a plastic spiral support structure. These pre-expanded components are fitted over the treated ends or joints of cables, and once the internal plastic support is removed, the cold shrink material tightly fits the cable’s insulation, forming the cable accessory. Unlike heat shrink accessories, which require heating for installation, cold shrink accessories rely on elastic shrinkage at room temperature, which is why they are commonly referred to as “cold shrink cable accessories.” Cold shrink cable terminations are available for various voltage levels. For low-voltage products (up to 1kV), there are no indoor or outdoor distinctions. However, for medium-voltage products (10kV, 20kV, and 35kV), there are specific indoor and outdoor models, and selecting the right type is crucial. Indoor products should not be used outdoors.
Key Features:
The cold shrink cable accessories are made of silicone rubber. They do not require open flame heating. They naturally fit by elastic contraction. The installation is quick, safe, and does not require special tools. The construction efficiency is high. They have excellent insulation performance, strong sealing ability, good weather resistance and anti-aging properties, waterproof and moisture-proof, and can adapt to large temperature differences. They are touchable, fully insulated, fully shielded, operate stably and reliably, and are suitable for various cable cross-sections and complex environments.
Why choose cold shrink cable accessories
Cold shrink cable accessories include cold shrink cable joints and cold shrink cable terminations. Cold shrink cable joints are used to connect two cable segments, ensuring circuit continuity, phase-to-phase or phase-to-ground insulation, sealing, and mechanical protection. Cold shrink cable terminations are installed at the end of cable lines to ensure the electrical connection of the power grid or other electrical equipment, while also providing a device for insulating and leading out the conductive cores of the cables.
Product Advantages
Cold Shrink Technology: The entire product set uses cold shrink technology, which requires no fire or special tools. The support strip is simply removed, and the elastic shrinkage ensures the product tightly fits the cable, completing the installation.
Reliable Insulation: The silicone rubber used has excellent insulation properties and high elasticity, ensuring proper radial pressure on the cable, minimal partial discharge, and consistent performance by “breathing” with the cable.
Excellent Sealing: Cold shrink cable accessories come with components such as end terminations, finger sleeves, insulating tubes, and sealing tubes, ensuring exceptional sealing and moisture resistance.
Ease of Installation: No fire or heat is required for installation, making the process faster and safer, reducing the risk of quality accidents caused by improper operation.
Wide Voltage Coverage: Available in 1kV, 10kV, 20kV, and 35kV models, with specific indoor and outdoor configurations for medium-voltage systems.
Operating Conditions
Voltage Ratings: Available in 1kV, 10kV, 20kV, and 35kV models, with specific indoor and outdoor configurations for medium-voltage systems.
Cable Types: Compatible with various types of cables, including XLPE and ERP, with copper or aluminum conductors.
Environmental Conditions: Designed to work in extreme environments such as high-altitude, cold, humid, or corrosive conditions, as well as areas with high UV exposure.
Installation: Can be installed without the need for heat or fire, reducing installation time and improving safety.
Application
The cold shrink type cable accessories are safe and convenient to install, have excellent sealing performance and strong weather resistance. They are mainly applicable to the terminals and intermediate connections of 10kV and 35kV high-voltage power cables, and are widely used in urban power grids, industrial and mining enterprises, substations, box-type substations, tunnels, subways, airports, ports, chemical industrial parks, etc., in indoor and outdoor environments and humid and harsh conditions with high requirements for construction safety and operational reliability.
Model meaning
Technical Parameters
List of Accessories
Model meaning
| NLS-10/3.1, JLS-10/3.4,WLS-35/1.4 | N / W / J: | Indoor terminal / Outdoor terminal / Straight-through joint |
| LS: | Cold-shrinkable type | |
| 10 / 35: | Rated voltage 10kV or 35kV | |
| 1.4 / 3.1 / 3.4: | Suitable for cable cross-sections |
Technical Parameters
| Item | Specification |
|---|---|
| Rated Voltage | 8.7/10 kV, 26/35 kV |
| Applicable Cables | XLPE insulated power cables (e.g. YJV, YJV22) |
| Applicable Conductor Size | 25–50, 70–120, 150–240, 300–400 mm² |
| Main Material | High-quality silicone rubber |
| Structure Type | Fully insulated, fully screened, touch-safe |
| Rated Current | 630 A |
| Power Frequency Withstand Voltage | 10 kV: 39 kV / 5 min; 35 kV: 95 kV / 5 min |
| Partial Discharge | ≤ 10 pC |
| Degree of Protection | IP68 (after installation and sealing) |
| Application Environment | Indoor / outdoor, humid conditions, direct burial, tunnels, cable trays |
| Product Types | Indoor termination, outdoor termination, straight-through joint |
List of Accessories
| No. | Item | Qty | Remarks |
|---|---|---|---|
| 1 | Cold shrink insulation tube (main body) | 1 set | Silicone rubber |
| 2 | Semi-conductive stress control tube | 1 pc | Electric field control |
| 3 | Copper cable lug | 1 pc | Matched to conductor size |
| 4 | Insulation tape / sealing tape | 1 roll | Waterproof sealing |
| 5 | Semi-conductive tape | 1 roll | Shielding treatment |
| 6 | Earthing wire / copper braid | 1 pc | For outdoor / armored cables |
| 7 | Constant force spring | Several | Shield grounding fixation |
| 8 | Installation support core (plastic spiral) | 1 set | Removed after installation |
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Cold Shrink Cable Straight Joint Accessories List
| No. | Item | Qty | Remarks |
|---|---|---|---|
| 1 | Cold shrink joint body | 1 set | Silicone rubber |
| 2 | Connector (crimping sleeve) | 1 pc | Copper, conductor joint |
| 3 | Semi-conductive tube | 2 pcs | Shielding at both ends |
| 4 | Insulation tape | 1 roll | Reinforced insulation |
| 5 | Semi-conductive tape | 1 roll | Electric field grading |
| 6 | Waterproof sealing tape | 1 roll | For burial / humid conditions |
| 7 | Installation support core | 1 set | For installation |
Custom Cold Shrink Cable Accessories Solutions
(The values can be customized according to project requirements.)
If you have specific requirements for the cold shrink cable accessories, please contact us. Our team will review your application needs and provide a tailored solution.
We can customize voltage level, cable size range, insulation structure, sealing performance, and other key parameters to ensure reliable insulation, moisture resistance, and safe cable connection in your power system. Zoliov cold shrink cable accessories are suitable for power distribution, substations, industrial plants, railways, ports, and other electrical infrastructure projects where fast installation, stable performance, and long-term reliability are required.
FAQ
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