This interphase spacer is specifically designed for the 220kV voltage level in the power grid environment. Given that it endures the line voltage which is higher than the phase voltage here, it must enhance the wet power frequency withstand voltage strength to meet strict electrical standards. When the power grid is in operation, it not only electrically isolates the conductors from one another but also has to bear various loads such as dynamic loads resulting from short circuits, ice shedding, and conductor galloping. To handle these challenges, its mechanical design is refined, like optimizing the size and transforming rigid connections into flexible ones. Moreover, since it's fixed at both ends on the conductors, reducing its weight is an important factor to lessen the load on the conductors and the supporting structures.
The 220kV Interphase Spacer with Two-bundle Spacer Clamps has remarkable features. It offers outstanding electrical insulation performance, ensuring reliable isolation between phases even under complicated power grid conditions. With strengthened mechanical strength, it can firmly maintain the distance between conductors and withstand external forces from different situations. Additionally, it has good resistance to environmental elements like temperature variations and severe weather conditions. In particular, in compact transmission lines where space is limited, it plays a vital role in safeguarding the safety of power transmission. And in cold regions, when ice and snow shedding may lead to serious conductor galloping, installing this interphase spacer is a more economical and efficient solution compared to other approaches like dealing with melting ice or snow or simply increasing the phase distance.
Standards:
IEC 61109-2008; IEC 62217-2012; ANSI C29.13; ANSI C29.12
Specifications:
Application:
It is mainly utilized between the conductors in the power grid, especially in compact transmission lines. Its main function is to keep the proper distance between phases and maintain electrical insulation, which is essential for the stable operation of the power grid and the reliable power supply.
Features:
● High Dependability:
Meeting the specific demands of the power grid, it can operate stably for a long time, reducing the frequency of maintenance and ensuring the smooth progress of power transmission.
● Special Design for Interphase Insulation:
Its structure and material selection are carefully optimized with an emphasis on interphase insulation. Different from common insulators, it takes into account the unique requirements of maintaining insulation between phases in a power grid.
● Excellent Anti-Ice and Anti-Galloping Capacity:
Considering the potential ice and snow problems in certain areas and the risk of conductor galloping, it has effective designs to alleviate these issues and ensure the normal operation of the power grid.
● Strong Adaptability to Load Variations:
With outstanding performance in coping with different dynamic loads, it can maintain its position and insulation function between conductors under various operating conditions.
Advantages of Preformed Suspension Clamps
● Good Cable Protection Performance:
✔ Uniform Stress Distribution: It has a larger contact area with the cable than ordinary suspension clamps, enabling uniform stress distribution and reducing stress concentration. This improves the cable's stress-bearing capacity and minimizes the risk of damage at the suspension point.
✔ Reduced Cable Wear: The preformed wire has sufficient grip to withstand high unbalanced loads, effectively preventing cable slippage, reducing friction and wear, and prolonging the cable's service life.
✔ Prevention of Fatigue Strand Breakage: Its special structure and materials, such as rubber clamping blocks, can further reduce the dynamic bending stress of the cable at the suspension point, making it less prone to fatigue strand breakage and providing good protection for the cable.
● Excellent Mechanical and Durability Properties:
✔ High-Quality Materials: The preformed wire is usually made of materials that match or are compatible with the cable, such as high-strength aluminum alloy. These materials have excellent elasticity, hardness, and strong corrosion resistance, are not prone to rust and aging, and can adapt to various harsh natural environments, significantly extending the service life of the suspension clamp.
✔ Strong Fatigue Resistance: Since no bolts directly act on the cable, stress concentration on the cable by the fittings is reduced. Coupled with its reasonable structural design, preformed suspension clamps have strong fatigue resistance and can maintain stable performance under long-term dynamic loading.
● Superior Electrical Performance:
✔ Reduced Corona Discharge: The ends of the preformed wire are usually rounded and have a smooth surface, effectively avoiding corona discharge. This is especially suitable for ultra-high voltage (220kV and above) lines, reducing electromagnetic losses, improving power transmission efficiency, and minimizing electromagnetic interference to the surrounding environment.
● Convenient and Efficient Installation:
✔ No Special Tools Required: During installation, preformed suspension clamps do not need any complex installation tools and can usually be operated by hand, which is simple and convenient. It saves a significant amount of installation time and labor costs, improves construction efficiency, and is particularly advantageous in emergency repairs or large-scale engineering constructions.
● Strong Adaptability:
✔ Wide Application Range: It is suitable for power lines of various voltage levels and different types of conductors and optical cables, such as ADSS optical cables and OPGW optical cables. It can also be used in different tower types and operating environments, including straight towers and angle towers.
✔ Good Angle Adaptability: The double-supported preformed suspension clamp can be used on long-distance transmission lines across rivers and towers with large angles (30° - 60°), meeting the needs of some special tower positions and line routings.
● Low Maintenance Cost:
✔ Preformed suspension clamps have good stability and reliability. They are not prone to loosening or damage during normal use and generally require little frequent maintenance and replacement. This reduces the line's maintenance cost and workload, minimizes power outage time due to maintenance and inspection, and improves the reliability and continuity of power supply.
