Tempered glass insulators are used for insulation and suspension of conductors in high-voltage and ultra-high-voltage AC and DC transmission lines. Initially used primarily on utility poles, they have gradually evolved into key components of high-voltage transmission lines. Their disc-shaped structure significantly increases creepage distance. They are constructed from an iron cap, tempered glass components, and steel feet, bonded together with cement. The cylindrical head design combines small head size, light weight, and high mechanical strength, 1-2 times higher than porcelain insulators.
The product's zero-value self-breakage characteristic allows for direct observation and fault identification, reducing the intensity of inspection and maintenance. Even after self-breakage, the remaining iron cap can still maintain line operation, eliminating the need for pole-climbing and piece-by-piece inspection. Tempered glass insulators possess excellent arc and vibration resistance, strong self-cleaning properties, and stable electromechanical performance after long-term use. Types include standard, pollution-resistant, and DC types. Production utilizes automated processes; for example, Shandong Ruitai Glass Insulator Co., Ltd., equipped with a German kiln control system and automated production line, produces over 6 million disc-type suspension tempered glass insulators annually. The pollution-resistant products, with their optimized umbrella-shaped structure, are suitable for power transmission environments in areas with moderate to heavy pollution.
