RAYCHEM 33KV 3C*300SQMM STRAIGHT THROUGH JOINT KIT

About RAYCHEM 33KV 3C*300SQMM STRAIGHT THROUGH JOINT KIT

A Raychem 33kV 3C*300sqmm straight through joint kit is a specialized set of components designed to connect two lengths of a specific type of high-voltage electrical cable. It ensures a continuous, reliable, and safe electrical and mechanical connection.

Heres a breakdown of what each part of the description means:

• Raychem: This is the brand name, now part of TE Connectivity. Raychem is a world leader in materials science and is particularly famous for its development of heat-shrinkable polymer technology, which is central to these jointing kits.

• 33kV (33,000 Volts): This is the voltage rating. It indicates the kit is designed for use on high-voltage (HV) power networks operating at a nominal voltage of 33 kilovolts.

• 3C * 300sqmm: This specifies the cable type the kit is designed for.

  • 3C: Stands for 3-Core, meaning the power cable has three separate conductors inside a single outer sheath.

  • 300sqmm ($300{\text{mm}}^2$): This is the cross-sectional area of each of the three copper or aluminum conductors within the cable. It dictates the current-carrying capacity of the cable.

• Straight Through Joint Kit: This describes the function of the kit. Its used to join two cable ends together in a straight line (end-to-end), as opposed to a "T" or branch joint. This is the most common type of joint, used for repairing damaged sections of cable or for connecting long sections together during installation.

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Purpose and Application

The primary purpose of this kit is to recreate the cables original structure across the joint. When a high-voltage cable is joined, its not enough to simply connect the conductors. The kit must also restore the cables multiple layers, including:

1. Conductor Connection: Using mechanical connectors (crimp ferrules) to join the 300 sq. mm conductors.

2. Electrical Stress Control: Managing the high electrical field at the joint to prevent electrical discharge and insulation failure. This is a critical function in HV applications.

3. Primary Insulation: Re-insulating the connected conductors to withstand the 33kV voltage.

4. Metallic Shielding: Reinstating the cables metallic screen for electrical safety and to provide a path for fault currents.

5. Environmental Sealing: Providing a tough, moisture-proof outer seal to protect the joint from water, chemicals, and mechanical damage.

These kits are essential for utility companies, industrial facilities, and infrastructure projects (like wind farms or substations) for both installing new cable runs and repairing existing ones.

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Key Features and Components

A typical Raychem heat-shrink jointing kit for this specification would include:

• Heat-Shrinkable Tubes: The core of the kit. These are multi-layer tubes that, when heated, shrink tightly over the cable and joint components.

  • Stress Control Tubing: A specialized tube applied over the connector and insulation screen ends to manage the electric field.

  • Insulating Tubing: A thick-walled tube that provides the primary electrical insulation.

  • Dual-Wall (Sealing) Tubing: A tube with an outer insulating layer and an inner layer of adhesive that melts and flows upon heating, creating a watertight seal.

• Mechanical Connectors: High-quality crimp ferrules designed to join the 300 sq. mm conductors securely.

• Metallic Shielding Components: Copper mesh or other conductive materials to bridge the cables metallic screen across the joint.

• Cleaning and Preparation Supplies: Solvent wipes, abrasive strips, and void-filling mastic to ensure the cable surfaces are perfectly clean and prepared for a reliable joint.

• Detailed Instructions: A comprehensive guide for the trained cable jointer to follow for a successful installation.

Superior Moisture Protection and Weather Resistance

The kit features heat-shrinkable and adhesive-lined components that ensure a long-lasting, moisture-resistant seal. Engineered for both indoor and outdoor applications, its high UV and weather resistance provides dependable protection even in harsh conditions. Ideal for direct buried or cable tray installations, this straight-through joint kit aids in maintaining cable integrity and performance.


Tested Reliability and Quality Assurance

Manufactured and tested according to leading international standards, including IEC 60502-4 and IEEE 404, the RAYCHEM kit is pre-tested to guarantee quality and durability. Its high dielectric strength and mechanical robustness assure reliable electrical performance and longevity in service, making it a trusted choice for power distribution networks.