Stress Control Yellow Mastic Tape is a specialized product used in electrical cable terminations and joints, primarily for medium to high-voltage cables (10kV and above). It plays a crucial role in managing electrical stress and ensuring reliable insulation at critical points where different materials meet, such as around connectors, cut-back areas, and cable shields.

Applications:

Cable Terminations & Joints: Stress control mastic tape is used in the termination and jointing of high-voltage cables to ensure smooth and reliable electrical performance. It is typically applied around cable connectors and semiconductor layers in cable terminations to provide electrical stress relief.

Electrical Stress Control: The tape is especially effective in areas where electrical fields are concentrated, such as around the middle metal connectors or at the cable shield’s termination point. It prevents electrical stress from causing partial discharge or breakdown of insulation material.

Insulation and Shielding: It can be used to fill gaps between the cable insulation and metal parts, ensuring continuity of the insulation barrier, which is crucial for preventing leakage currents and maintaining system reliability.

Functions:

Electrical Stress Control: The primary role of the stress control mastic tape is to manage and control electrical stress by redistributing the electrical field across the cable termination or joint. This is critical to prevent insulation failure and ensure longevity of the cable system.

Gap Filling: It fills any gaps between the insulation layers and the metal or semi-conductive parts of the cable, ensuring that there are no voids that could lead to electric arcing or degradation of insulation over time.

Enhanced Insulation: The tape contributes to the overall insulation system by improving dielectric strength, providing a more uniform electric field distribution, and protecting the underlying cable components from electrical and mechanical stresses.

Characteristics:

Highly Flexible: The mastic tape is extremely flexible, allowing it to conform to the shape of the cable and connectors, ensuring a tight and secure fit.

Excellent Adhesion: It has excellent adhesion properties, ensuring a durable bond with various cable materials, including rubber, semiconductors, and metal surfaces.

High Dielectric Strength: The tape is designed to withstand high voltages, providing effective insulation and stress control even in extreme electrical environments.

Temperature Stability: Stress control mastic tapes are often designed to remain stable across a wide temperature range, from -40°C to 80°C or higher.

Durability: It is resistant to moisture, corrosion, and environmental factors, ensuring long-term performance and protection in harsh conditions.