24kV 3-Core Cold Shrink Straight Cable Joint Kit XLPE Power Cable Connector 70-120mm² Silicone Rubber
24kV Silicone Cold Shrink Straight Cable Joint Kit – 3-Core XLPE Power Cable Connector
Product Overview
The WNRLN CSJ-24/3C-120-SI is a premium 24kV silicone cold shrink straight cable joint kit designed for 3-core XLPE insulated power cables with conductor sizes 70mm² to 120mm². Utilizing high-temperature vulcanized (HTV) silicone rubber insulation, this joint kit delivers exceptional thermal stability up to +180°C, making it the ideal choice for demanding industrial environments, high-ambient substations, and regions with extreme temperature swings.
Key Features
- HTV Silicone Rubber Insulation – Superior thermal resistance from -60°C to +180°C continuous operation, far exceeding EPDM limits. Excellent UV, ozone, and corona discharge resistance for outdoor and high-altitude installations.
- 24kV Rated Voltage – Designed and tested for 24kV (Um=25kV) medium voltage power distribution per IEC 60502-4.
- Cold Shrink Installation – Pre-stretched silicone body on removable spiral core. Pull out the core for instant, uniform contraction – no heat, no gas, no tools.
- 3-Core Straight Joint Design – Integrated three-phase connector with stress control, insulation, shielding, and outer sealing in one compact assembly.
- Wide Conductor Range – Compatible with 70-120mm² sector-shaped or round stranded copper/aluminum conductors.
- Hydrophobic Surface – Silicone rubber naturally repels water and resists tracking, providing superior pollution performance in coastal and high-humidity environments.
- IP68 Sealed – Triple-layer moisture barrier ensures reliable operation in direct burial and submerged applications.
- Fast Installation – Typical joint completion under 50 minutes by a trained two-person crew.
Applications
- High-temperature industrial plants (steel mills, foundries, glass factories)
- Coastal and offshore wind farm collector grids
- High-altitude substation cable interconnections
- Underground MV distribution in tropical climates
- Mining and chemical processing power systems
- Cable repair in fire-resistant circuits
Technical Specifications
| Rated Voltage (U0/U) | 12/20kV (24kV class, Um=25kV) |
| Conductor Size Range | 70mm² – 120mm² |
| Number of Cores | 3-Core |
| Insulation Material | HTV Silicone Rubber |
| Connector Type | Straight Through Joint (In-line) |
| Cable Insulation Type | XLPE (Cross-Linked Polyethylene) |
| Installation Method | Cold Shrink – Pull-out Core, No Heat Required |
| Operating Temperature | -60°C to +180°C (Continuous) |
| Short Circuit Thermal Rating | 40kA / 1 second |
| Impulse Withstand Voltage | 125kV Peak (1.2/50μs waveform) |
| Power Frequency Withstand | 55kV / 5 minutes |
| Partial Discharge | <10pC at 1.73U0 (20.7kV) |
| Tracking Resistance | Class 1A 4.5 (IEC 60587) |
| Ingress Protection | IP68 (Submersion Ready) |
| Standards Compliance | IEC 60502-4, IEEE 404 |
Kit Contents
- 3 x Cold Shrink Straight Joint Bodies (HTV Silicone, one per phase)
- 1 x Cold Shrink Outer Jacket Sleeve (Silicone)
- 3 x Shear Bolt Connectors (tinned copper, 70-120mm²)
- 1 x Roll Silicone Mastic Sealing Tape
- 3 x Copper Mesh Screen Socks
- 1 x Constant Force Spring Set
- 1 x Roll Abrasive Cloth
- 3 x Cleaning Wipes
- 1 x Installation Instruction Manual
Quality Assurance
Every WNRLN silicone cold shrink joint undergoes 100% routine testing including partial discharge measurement, AC voltage withstand, thermal cycling, and dimensional inspection. Our ISO 9001:2015 certified facility ensures batch-to-batch consistency. Type test reports per IEC 60502-4 available on request.
Contact our sales team today for pricing, custom silicone formulations, or OEM requirements. Volume discounts available for project orders.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.