overhead line joints, also known as splices or connectors, are essential for joining conductor sections, repairing damage, and ensuring the line's mechanical and electrical integrity. The selection of a joint type is critical and depends on the specific application, conductor material, and required mechanical strength.

The most common types of overhead line joints are:

• Compression Joints: These are the most widely used for permanent, high-strength connections in both transmission and distribution lines. A compression joint is a metal sleeve that is crimped onto the conductor ends using specialized hydraulic compression tools and dies. This method creates a highly reliable, permanent bond with excellent electrical conductivity and mechanical strength, often matching or exceeding the conductor's breaking strength.

• Bolted Connectors: These joints use a bolt-and-nut mechanism to clamp two conductors together. Bolted connectors are often used for making non-tension connections, such as service taps or in substations where the conductors are not under high tension. They offer the advantage of being easily installed and removed, making them suitable for temporary repairs or connections that may need to be adjusted later.

• Automatic Splices: These are designed for quick and easy installation, often for distribution lines or emergency repairs. An automatic splice contains a spring-loaded or wedge mechanism with serrated jaws that automatically grip the conductor ends when inserted, creating an immediate and secure connection without the need for specialized crimping tools.

At Ningbo Changshi Electric Power Manufacturing Limited, we provide a full range of high-quality equipment for all types of overhead line joints, from heavy-duty hydraulic compression tools for transmission line construction to various clamps and connectors for distribution projects. Our tools are designed to ensure precise and reliable connections, enhancing the safety and longevity of your power grid.