24kV 3-Core Cold Shrink Straight Cable Joint Kit XLPE Power Cable Connector 70-120mm² EPDM Rubber
24kV Cold Shrink Straight Cable Joint Kit – 3-Core XLPE Power Cable Connector
Product Overview
The WNRLN CSJ-24/3C-120 is a high-performance 24kV cold shrink straight cable joint kit engineered for 3-core XLPE insulated power cables with conductor sizes ranging from 70mm² to 120mm². Designed for medium voltage distribution networks, this joint kit provides reliable, long-term electrical and mechanical protection in underground, trench, and substation installations.
Key Features
- True Cold Shrink Technology – One-piece EPDM rubber body pre-stretched on a removable spiral core. Simply pull out the core after positioning – no heat, no gas torch, no special tools required.
- 24kV Rated Voltage – Designed and tested for 24kV (Um=25kV) medium voltage power distribution systems, meeting IEC 60502-4 standards.
- 3-Core Straight Joint – Integrates three-phase conductor connection, insulation, shielding, and outer sealing in one compact assembly.
- EPDM Rubber Insulation – Ethylene Propylene Diene Monomer provides excellent electrical insulation, UV resistance, ozone resistance, and thermal stability from -40°C to +90°C.
- Wide Conductor Range – Compatible with 70mm² to 120mm² sector-shaped or round stranded copper/aluminum conductors.
- Integrated Stress Control – Built-in geometric stress cones ensure uniform electric field distribution, eliminating partial discharge risks.
- IP68 Waterproof Sealing – Triple-layer sealing system with silicone mastic tape and outer EPDM jacket provides complete moisture ingress protection for direct burial applications.
- Fast Field Installation – Typical installation time under 45 minutes per joint for a trained crew, significantly faster than heat-shrink or resin-based alternatives.
Applications
- Medium voltage underground distribution networks (24kV class)
- Wind farm collector grid cable connections
- Industrial plant MV power distribution
- Utility substation cable interconnections
- Cable repair and extension projects
- Mining and tunnel power supply systems
Technical Specifications
| Rated Voltage (U0/U) | 12/20kV (24kV class, Um=25kV) |
| Conductor Size Range | 70mm² – 120mm² |
| Number of Cores | 3-Core |
| Insulation Material | EPDM Rubber (Ethylene Propylene Diene Monomer) |
| 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 | -40°C to +90°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) |
| Ingress Protection | IP68 (Submersion Ready) |
| Standards Compliance | IEC 60502-4, IEEE 404 |
Kit Contents
- 3 x Cold Shrink Straight Joint Bodies (EPDM, one per phase)
- 1 x Cold Shrink Outer Jacket Sleeve
- 3 x Shear Bolt Connectors (tinned copper, for 70-120mm² conductors)
- 1 x Roll Silicone Mastic Sealing Tape
- 3 x Copper Mesh Screen Socks
- 1 x Constant Force Spring Set (for screen continuity)
- 1 x Roll Abrasive Cloth
- 3 x Cleaning Wipes
- 1 x Installation Instruction Manual
Quality Assurance
Every WNRLN cold shrink cable joint undergoes 100% routine testing including partial discharge measurement, AC voltage withstand, and dimensional inspection before shipment. Our ISO 9001:2015 certified manufacturing facility ensures consistent quality across every production batch. Type test reports per IEC 60502-4 are available upon request.
Contact our sales team today for pricing, technical datasheets, or to discuss your specific cable joint requirements. OEM and custom branding available for volume orders.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.