Effective Lightning Protection Strategies Using 110kV Composite Jacket Arresters
Release time:
2025-08-07
110kV composite jacket arresters are designed based on the non-linear characteristics of metal oxide varistors, typically zinc oxide (ZnO).
Lightning strikes pose a significant threat to the reliable operation of 110kV power systems. These strikes can induce high-voltage surges, leading to insulation breakdown, equipment damage, and power outages. 110kV composite jacket arresters have emerged as a crucial component in safeguarding power systems against lightning-related hazards. This paper delves into the various strategies for effectively using these arresters to enhance lightning protection.
110kV composite jacket arresters are designed based on the non-linear characteristics of metal oxide varistors, typically zinc oxide (ZnO). In normal operating conditions, when the voltage across the arrester is within the system's rated voltage range, the arrester exhibits a high resistance. As a result, only a negligible leakage current flows through it, ensuring that it does not interfere with the normal operation of the power system.

However, during a lightning strike, a high-voltage surge is introduced into the power line. Once the voltage across the arrester exceeds its set threshold, the arrester's resistance rapidly decreases. This allows a large current to flow through the arrester, diverting the lightning current safely to the ground. By doing so, the arrester effectively limits the voltage surge on the power line, protecting downstream equipment such as transformers, switches, and insulators from the damaging effects of lightning overvoltages. The composite jacket of the arrester offers several advantages. It provides excellent mechanical strength, protecting the internal components from physical damage during installation, operation, and in harsh environmental conditions. Additionally, the composite material has good electrical insulation properties, which helps in maintaining the integrity of the arrester's performance. It also offers enhanced resistance to moisture, pollution, and ultraviolet radiation, making it suitable for use in a wide range of geographical locations.
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