A 35kV three-core cold shrink intermediate cable joint is a high-voltage cable accessory designed to connect and restore three-core power cables in medium- and high-voltage distribution networks. It is widely used in underground power systems, industrial plants, substations, renewable energy projects, and urban electrical infrastructure where reliable transmission and stable insulation performance are required. The joint provides mechanical continuity, electrical insulation, environmental sealing, and long-term protection for the cable connection point.The main feature of this type of cable joint is the cold shrink technology. Unlike heat shrink products, the cold shrink intermediate joint does not require open flame, heating tools, or special heating equipment during installation. The pre-expanded insulating and sealing components are placed on a removable support core. When the core is pulled out, the components contract automatically and tightly fit the cable surface. This ensures a consistent pressure seal and greatly reduces installation time and human error. Because of this simple and safe installation method, cold shrink cable joints are especially suitable for field construction, emergency repairs, and locations where fire is not allowed.The 35kV three-core structure means the joint is designed for cables containing three insulated phase conductors within one outer sheath. It is engineered to maintain balanced electrical performance among all three phases. The insulation system is typically made from high-quality silicone rubber or similar elastic materials with excellent aging resistance, tracking resistance, and hydrophobic properties. These materials help withstand electrical stress, moisture, dust, UV exposure, and temperature changes over long service periods. The joint body also includes stress control elements to manage the electric field at the connection area and prevent partial discharge or insulation failure.An intermediate cable joint usually includes conductor connectors, insulation tubes, sealing layers, grounding accessories, and protective outer sleeves. The conductor connectors ensure a secure electrical and mechanical connection between the cable ends. The insulation and sealing parts restore the original cable insulation level and provide moisture-proof protection. Grounding components help safely discharge leakage current and improve operational safety. The outer protection layer offers resistance against mechanical impact, soil pressure, and environmental damage.This type of cable joint is valued for its durability, flexibility, and stable performance. It is suitable for both indoor and outdoor installations and can operate under harsh environmental conditions. Proper installation, cable preparation, and strict cleaning of the jointing area are essential to achieve optimal performance. When installed correctly, a 35kV three-core cold shrink intermediate cable joint can deliver reliable service for many years, supporting safe and efficient power transmission in modern electrical networks.