- Time：2026/4/4 posted：Kehong Enterprises Co.,Ltd.
As the lifeline of urban energy transmission, overhead power lines are confronted with complex safety challenges during long-term operation. Driven by accelerated urbanization, the distances between power lines and environmental elements such as buildings, tunnels, elevated roads, trees and fishponds have been continuously reduced. Coupled with the impacts of natural factors including wind, rain, thunder and lightning, bird hazards, dust and fouling, potential safety hazards such as short circuits, current leakage and electric shock have become increasingly prominent, posing a severe threat to power grid stability and public security.
The safety hazards of overhead power lines are diverse: construction activities may cause mechanical damage, tree growth easily triggers line short circuits, bird nesting leads to insulator flashover, lines above fishponds suffer accelerated aging due to moisture and salt spray erosion, and intersections of tunnels and elevated roads increase fault risks owing to limited space. These hazards not only impair power supply reliability but also may induce major safety accidents, thus creating an urgent demand for efficient and reliable comprehensive insulation protection schemes.As a professional solution provider for cable accessories, Guangzhou Kehong has launched a three-in-one insulation protection system integrating snap-on insulating protective sleeves, silicone self-amalgamating tapes and protective boxes to address the complex protection requirements of overhead power lines, equipping power lines with an all-round "safety coat". The scheme features three core advantages:
Snap-on insulating protective sleeves: Made of high-elastic silicone rubber, they enable rapid installation without hot work and tightly wrap bare conductors to form an insulation barrier. Suitable for 10–35 kV urban and rural power grid lines, they effectively isolate lines from the external environment, prevent windage short circuits, foreign object contact, acid-alkali corrosion and other faults, and are particularly applicable to line protection in complex crossing areas.
Silicone self-amalgamating tapes: Serving as the sealing and reinforcing layer for protective sleeves, they possess excellent insulation, water resistance and self-bonding properties. Wound around both ends and joints of protective sleeves during construction, they form a seamless seal to block the intrusion of moisture, dust and fouling, enhance the mechanical strength of the insulation structure, and adapt to harsh environments such as high and low temperatures and ultraviolet radiation.
Protective boxes: Designed for key parts such as line joints and branches, they are fabricated from high-strength insulating materials to provide dual guarantees of mechanical protection and insulation. Featuring detachability, protective boxes facilitate later overhaul and maintenance without damaging the insulation structure, realizing convenient "install-and-use, disassemble-and-repair" operation and significantly reducing operation and maintenance costs.
This solution has been successfully applied in multiple power grid projects, effectively lowering line fault rates and improving power supply reliability. Guangzhou Kehong has long been committed to the development and application of new electrical insulation materials, and has established extensive industry-university-research cooperation with scientific research institutions including the Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Lanzhou University of Technology and Soochow University, developing high-performance insulation products relying on cutting-edge technologies. All the company’s products have obtained authoritative certifications such as ISO 9001, UL and RoHS. The company promotes the progress of the power insulation protection field through technological innovation, providing solid support for the construction of a safe, efficient and intelligent modern power grid.