10 kV Single-Core Cold Shrink Straight-Through Cable Joint Kit
The 10 kV single-core cold shrink straight-through cable joint kit is used to connect two sections of XLPE-insulated medium-voltage power cable. It restores conductor continuity, cable insulation, electrical stress control, metallic-screen continuity and outer environmental protection at the joint position.
The pre-expanded cold shrink joint body is supplied on a removable supporting core. During installation, the support core is withdrawn and the elastomeric body contracts uniformly around the prepared cable. No flame, torch or external heating is required. This makes the system suitable for cable trenches, substations, industrial facilities and other locations where hot-work operations are restricted.
Important: The product image shows the main cold shrink joint body only. The conductor connector, screen-restoration components, grounding materials, sealing materials and installation accessories supplied with a complete kit must be confirmed in the quotation or approved bill of materials.
Key Features
- Designed for straight-through joining of single-core medium-voltage power cables
- Cold shrink installation without flame or external heating
- Prefabricated elastomeric body provides insulation and electrical stress control
- Compatible with copper or aluminium conductors when the correct connector is selected
- Available for copper-wire-screen and copper-tape-screen cable constructions
- Suitable for armoured or unarmoured cables with the corresponding accessory package
- Compact installation method suitable for cable trenches and restricted working spaces
- Connector type, cable dimensions and accessory contents can be configured for the project
Typical Technical Data
| Product Type | Single-Core Cold Shrink Straight-Through Cable Joint Kit |
|---|---|
| Network Class | 10 kV medium-voltage distribution system |
| Rated Voltage Options | 6/10 (12) kV, 6.35/11 (12) kV or 8.7/15 (17.5) kV, subject to system requirements |
| Number of Cable Cores | Single core |
| Cable Insulation | XLPE or compatible extruded polymeric insulation |
| Conductor Material | Copper or aluminium |
| Representative Conductor Range | 70–400 mm²; the exact range depends on cable-insulation diameter and the selected joint-body size |
| Joint Body | Pre-expanded silicone rubber or EPDM elastomer, according to product design |
| Stress-Control System | Integrated or separately installed semi-conductive stress-control components |
| Connector Options | Mechanical shear-bolt connector or compression connector |
| Metallic Screen Options | Copper-wire screen or copper-tape screen |
| Armour Compatibility | Armoured or unarmoured cable, subject to kit configuration |
| Installation Method | Cold shrink; no flame or external heating required |
| Installation Environment | Indoor, outdoor, cable trench or cable duct; direct-burial use requires the specified outer sealing and protection system |
| Body Color | Black or grey, depending on elastomer formulation |
| Customization | Cable size, connector, screen type, armour arrangement, grounding components, markings and packaging |
The values above are representative selection information and must be checked against the actual cable construction, cable-insulation diameter and approved manufacturer drawing.
Typical Kit Components
- Pre-expanded cold shrink joint body
- Conductor connector, when included in the agreed supply scope
- Semi-conductive or stress-control materials
- Copper screen mesh, braid or screen-continuity components
- Grounding braid or grounding lead where required
- Constant-force springs or equivalent screen-connection components
- Insulating, sealing and protective tapes or mastic
- Cold shrink outer protection tube or equivalent re-jacketing system
- Cable-cleaning materials and installation instructions
Kit contents vary with the cable screen, armour structure, conductor material and connector option. The final packing list should be confirmed before ordering.
Materials and Construction
The insulating joint body is normally manufactured from silicone rubber or EPDM elastomer with suitable dielectric and mechanical properties. Semi-conductive components are used to control the electrical field around the cable-insulation cutback and conductor connection.
The conductor connection may use a shear-bolt mechanical connector or a compression sleeve selected for the cable conductor material and cross-sectional area. Copper braid, copper mesh or other approved screen components are used to restore metallic-screen continuity. The external re-jacketing and sealing system may consist of a cold shrink outer tube, insulating tape and sealing mastic.
Surface and Environmental Protection
This product does not use a conventional metal surface treatment as its primary protection method. Environmental protection is provided by the elastomeric joint body and the specified external sealing and re-jacketing components. Metal connectors and grounding parts may be tinned or otherwise protected according to the approved material specification.
Water resistance, direct-burial suitability, ultraviolet resistance and chemical resistance must be verified from the test report and the exact kit configuration. These properties should not be assumed from the appearance of the joint body alone.
Applications
- 10 kV underground power-distribution cable systems
- XLPE-insulated single-core power-cable connections
- Substations and switching stations
- Industrial plants, commercial facilities and infrastructure projects
- Cable trenches, ducts and utility vaults
- Repair, extension and new installation of medium-voltage cable circuits
Installation Notes
- Confirm the cable voltage class, conductor size, insulation diameter, screen type and armour construction.
- Prepare the cable strictly according to the installation dimensions supplied with the selected kit.
- Install the conductor connector using the specified shear-bolt sequence or compression dies.
- Clean the cable insulation and remove sharp edges or conductive contamination.
- Position the joint body and withdraw the supporting core in the specified direction.
- Restore the metallic screen, grounding connection and cable armour where applicable.
- Install the outer sealing and mechanical-protection components.
- Complete the required inspection and electrical tests before energizing the circuit.
Installation must be carried out on a de-energized cable by trained medium-voltage cable jointers. Cable-preparation dimensions and installation procedures must follow the instructions supplied with the selected kit.
Applicable Standards
- IEC 60502-4 – Test requirements for accessories for extruded-insulation power cables
- GB/T 12706.4-2020 – Test requirements for power-cable accessories from 6 kV to 35 kV
- IEC 61238-1-3 – Test requirements for compression and mechanical connectors above 1 kV and up to 30 kV
- Applicable customer specifications and local utility requirements
Compliance with a particular standard must be supported by the test report for the exact product model and cable configuration.
Information Required for Selection
- System voltage and cable rated voltage
- Single-core cable model and manufacturer
- Copper or aluminium conductor
- Conductor cross-sectional area
- Diameter over the cable insulation
- Copper-wire or copper-tape screen
- Armoured or unarmoured cable
- Connector required or supplied separately
- Indoor, outdoor, duct, trench or direct-burial installation
- Applicable standard and required test reports
Frequently Asked Questions
Does the joint require a heating torch?
No. The pre-expanded body contracts after the removable support core is withdrawn. The installation itself does not require flame or external heating.
Can it be used with both copper and aluminium cables?
Yes, provided that a connector suitable for the conductor material, conductor size and required electrical performance is selected.
Is the conductor connector included?
The connector may be included or supplied separately. The agreed quotation and packing list must state the exact supply scope.
Can it be installed underground?
Underground installation is possible only when the complete joint system includes the appropriate moisture sealing, screen restoration and mechanical outer protection. The approved product test report and installation instructions must be checked.
