24kV 3-Core Cold Shrink T-Branch Cable Joint Kit XLPE Power Cable Connector 70-120mm² EPDM Rubber
24kV EPDM Cold Shrink T-Branch Cable Joint Kit – 3-Core XLPE Power Cable Branch Connector
Product Overview
The WNRLN CBJ-24/3C-120 is a specialized 24kV EPDM cold shrink T-branch cable joint kit engineered for creating reliable tee-off connections in 3-core XLPE insulated power cable networks. Designed for 70-120mm² conductors, this branch joint kit enables safe lateral feeder tap-off from main distribution lines without interrupting the through-circuit – essential for urban ring main units, industrial loop networks, and expanding MV infrastructure.
Key Features
- T-Branch Configuration – Enables one main line to branch into two directions (through + lateral tap), forming a reliable T-connection in 3-core MV cable networks.
- EPDM Rubber Insulation – Ethylene Propylene Diene Monomer provides excellent electrical insulation, mechanical resilience, and proven long-term aging resistance.
- 24kV Rated Voltage – Designed for 24kV (Um=25kV) medium voltage distribution per IEC 60502-4 standards.
- Cold Shrink Technology – Pre-stretched EPDM bodies on spiral cores eliminate the need for heat or gas torches during installation. Safe for confined spaces and gas-sensitive environments.
- Integrated Stress Control – Each branch leg incorporates geometric stress cones ensuring uniform electric field distribution at the critical triple-point junction.
- Wide Conductor Range – Handles 70-120mm² sector-shaped or round conductors on both main line and branch legs.
- IP68 Waterproof – Multi-layer EPDM sealing system provides complete moisture protection for direct burial, duct, and trench installations.
- Compact Footprint – The pre-molded T-body design minimizes excavation requirements compared to traditional heat-shrink branch joints.
Applications
- Urban underground MV ring main unit (RMU) feeder connections
- Industrial plant loop distribution networks
- Wind farm collector grid branching
- Utility lateral tap-off to distribution transformers
- Commercial building campus MV distribution
- Network expansion and capacity upgrade projects
Technical Specifications
| Rated Voltage (U0/U) | 12/20kV (24kV class, Um=25kV) |
| Conductor Size Range | 70mm² – 120mm² (all legs) |
| Number of Cores | 3-Core |
| Insulation Material | EPDM Rubber |
| Connector Type | T-Branch Joint (Main Line Through + Lateral Tap) |
| 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, CENELEC HD 629 |
Kit Contents
- 3 x Cold Shrink T-Branch Joint Bodies (EPDM, one per phase)
- 2 x Cold Shrink Outer Jacket Sleeves (main line + branch)
- 6 x Shear Bolt Connectors (tinned copper, 70-120mm²)
- 1 x Roll Silicone Mastic Sealing Tape
- 3 x Copper Mesh Screen Socks
- 2 x Constant Force Spring Sets (per cable entry)
- 1 x Roll Abrasive Cloth
- 6 x Cleaning Wipes
- 1 x Installation Instruction Manual
Quality Assurance
Each WNRLN T-branch joint undergoes 100% routine testing including partial discharge measurement, AC withstand, and dimensional checks. Our ISO 9001:2015 certified factory maintains rigorous process controls. Complete type test documentation per IEC 60502-4 is available to qualified buyers.
Contact our sales team today to discuss your branch joint requirements, request technical datasheets, or inquire about OEM and custom configurations for your distribution network projects.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.