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4E
Medium voltage cold shrink cable accessories are pre‑expanded components manufactured from high‑grade silicone rubber or EPDM (ethylene propylene diene monomer). They are specifically designed for fast, safe, and reliable installation on medium voltage power cables — typically ranging from 6kV to 35kV (up to 42kV in some applications).
Unlike traditional heat shrink cable accessories, cold shrink products do not require open flames, hot air guns, or special heating tools. This makes installation safer, cleaner, and more efficient, especially in confined spaces, hazardous environments, or remote field locations.
Cold shrink technology is widely used for:
Cable terminations (indoor and outdoor)
Straight‑through joints
Transition joints (e.g., XLPE to PILC)
Plug‑in separable connectors
Cable lugs and adapters
Repair and branch joints
The flexible cold shrink structure allows the material to conform tightly to cable surfaces, providing:
Dependable insulation performance
Superior sealing reliability
Long‑term service stability
Partial discharge control
These accessories are ideal for utility power distribution, industrial electrical systems, and renewable energy cable networks including solar farms, wind power plants, and energy storage systems.
Cold shrink cable accessories are designed and tested to meet the performance requirements of major international standards.
| Standard | Description |
|---|---|
| IEC 60502 | Power cables with extruded insulation for rated voltages from 1 kV up to 30 kV |
| IEEE 404 | Cable joints and terminations for extruded and laminated dielectric cables |
| BS EN 50393 | Test methods and requirements for accessories for distribution cables |
| ASTM D2671 | Standard test methods for heat‑shrinkable tubing (applicable to cold shrink materials) |
These certifications ensure global safety, reliability, and performance benchmarks for MV cable systems.
Material: High‑grade silicone rubber or EPDM
UV resistance – suitable for outdoor overhead
Ozone resistance – prevents cracking in polluted environments
Moisture resistance – ideal for underground and direct burial
Chemical resistance – withstands industrial pollutants, oils, acids
Wide temperature tolerance – –40°C to +90°C
Pre‑stretched over a removable plastic support core
No external heating required
Creates tight, controlled fit with consistent radial pressure, no voids, reduced installation errors
| Layer | Function |
|---|---|
| Stress control layer | Manages electrical field distribution |
| Insulation barrier | Restores dielectric strength |
| Waterproof sealing element | Prevents moisture ingress |
| Semi‑conductive layer | Provides electrical continuity for shielding |
| Outer protective layer | Resists abrasion, UV, environmental stress |
| Feature | Description |
|---|---|
| Flame‑free installation | No torch or hot air gun – improves safety in hazardous areas |
| Fast & tool‑free | 15–30 minutes per termination; ideal for emergency repairs |
| Flexible sealing | Adapts to irregular cable surfaces; maintains sealing pressure over decades |
| Reliable insulation | PD‑free when properly installed (<5pC at 2U₀) |
| Strong environmental resistance | UV, ozone, humidity, chemicals |
| Long service life | 30+ years; no periodic retorquing |
| Wide cable compatibility | XLPE, EPR, PILC; copper & aluminum; single‑core & three‑core |
| Sector | Application |
|---|---|
| Utility Power Distribution | Primary/secondary networks (6kV–35kV), substation terminations, underground feeder joints |
| Industrial Electrical Systems | Mining, oil & gas refineries, chemical plants, steel mills, data centers |
| Renewable Energy | Solar farms (DC/AC side), wind farms (onshore/offshore), energy storage systems |
| Infrastructure & Transportation | Airport power, railway electrification, tunnel lighting, ports |
| Feature | Cold Shrink | Heat Shrink |
|---|---|---|
| Installation tools | No heat required | Torch or hot air gun |
| Installation time | 15–30 min | 30–60 min |
| Skill dependency | Low | High |
| Fire risk | None | Present |
| Field consistency | High (pre‑engineered fit) | Dependent on heating technique |
| Material | Silicone rubber / EPDM | Polyolefin / PVC |
| Product Type | Voltage Range | Cable Types | Core Configuration |
|---|---|---|---|
| Indoor termination | 6kV – 35kV | XLPE, EPR, PILC | 1‑core, 3‑core |
| Outdoor termination | 6kV – 35kV | XLPE, EPR, PILC | 1‑core, 3‑core |
| Straight joint | 6kV – 35kV | XLPE, EPR, PILC | 1‑core, 3‑core |
| Transition joint | 6kV – 35kV | XLPE to PILC | 1‑core, 3‑core |
| Plug‑in connector | 6kV – 35kV | XLPE | 1‑core |
| Repair joint | 6kV – 35kV | XLPE, EPR | 1‑core, 3‑core |
Packaging: Sealed plastic bag with removable support core + installation instructions
Kit contents: Stress control tubes, insulation tubes, sealing mastics, cleaning wipes, abrasive pads, earth braids (depending on type)
Standard packing: Individual carton boxes for small quantities; wooden pallets for bulk orders
Shipping: Worldwide by sea, air, or land freight
