66kV cold shrink outdoor cable terminal 1x150-800

A high-voltage cable accessory made using cold shrinkage technology (i.e. utilizing the pre expansion and contraction characteristics of high elastic silicone rubber material, without the need for open flame heating) for 66kV voltage level power cables, installed in outdoor environments (such as iron towers, poles) and connected to overhead lines or electrical equipment.
1. Product definition and classification
According to industry standards and product information, 66kV outdoor cold shrink cable terminals belong to a type of high voltage cold shrink cable accessory.
·According to voltage level: it belongs to the 66kV (or Um=72.5kV) level.
·According to usage conditions: specifically designed for outdoor environments, it needs to withstand weather conditions such as sun exposure, rain, and pollution.
2. Product structure:
·Umbrella skirt: The outer side of the terminal tube is uniformly equipped with a silicone rubber umbrella skirt, providing necessary creepage distance to resist outdoor pollution and humid environments.
·Material: High quality silicone rubber is mainly used, which has excellent weather resistance, leak resistance, electrical corrosion resistance, and water repellency (self-cleaning function).
·Sealing and mechanical structure:
·Including outgoing terminals (wiring fittings), sealing tubes/waterproof tapes, tail pipes, and grounding terminals, ensure reliable conductor connections and prevent moisture from entering.
3. Main technical advantages
Compared with traditional porcelain or heat shrink terminals, 66kV cold shrink outdoor terminals have significant advantages:
·Easy and safe installation: No need for open flame heating (heat shrink process requires a blowtorch), suitable for use in flammable areas, small spaces, or trenches with already laid cables, reducing construction risks.
·Stable and reliable performance:
·Interface pressure: Relying on the elastic retraction force of rubber, it can provide persistent radial pressure on the cable body, without interlayer detachment or air gap caused by thermal expansion, contraction or bending of the cable, avoiding internal crawling and electrical breakdown.
·Prefabricated molding: The stress control unit is formed by high-temperature and high-pressure vulcanization in the factory, with uniform shape and size, avoiding human errors caused by manual wrapping or heat shrinkage on site, and highly stable electrical performance.
·Wide applicability: One specification of cold shrink parts can often be applied to multiple cable cross-sections, reducing the need for material preparation specifications.
·Small size and light weight: Compared with porcelain sleeve terminals, the weight is greatly reduced (such as the 110kV prefabricated terminal can be as light as 20kg), and the installation position is flexible

·According to voltage level: it belongs to the 66kV (or Um=72.5kV) level.
·According to usage conditions: specifically designed for outdoor environments, it needs to withstand weather conditions such as sun exposure, rain, and pollution.