{"id":7632,"date":"2025-10-28T03:10:36","date_gmt":"2025-10-28T03:10:36","guid":{"rendered":"https:\/\/www.raxpower.com\/?page_id=7632"},"modified":"2026-08-12T04:23:01","modified_gmt":"2026-08-12T04:23:01","slug":"zupfrisolator","status":"publish","type":"page","link":"https:\/\/www.raxpower.com\/de\/overhead-line-insulator\/stay-insulator\/","title":{"rendered":"Seilisolator"},"content":{"rendered":"
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Stay Insulator<\/h2>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>
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A stay insulator, also called a stay type insulator or egg insulator, is a low voltage insulator that fastens and counterweights dead-end poles by connecting with stay wires or guy grips. Its primary function is to prevent accidental electric conduction on stay wires, particularly when wires break or poles fall. Installed in the middle of stay wires, the insulator ensures the lower conductor portion remains voltage-free during pole failure, mitigating electrical hazards and enhancing system safety.<\/p>\n

Stay insulators are manufactured from glazed porcelain produced through wet processes, complying with standards such as British Standard (BS) 137. Porcelain provides high mechanical strength to handle conductor weight and tension, high dielectric strength to withstand voltage stress, and non-porous characteristics that resist moisture absorption. The material also resists temperature fluctuations, chemical exposure, and Ultraviolet (UV) radiation, ensuring consistent performance without degradation.<\/p>\n

Technical specifications include voltage ratings of 11kV and 33kV, tensile strength values from 44kN to 222kN, creepage distances from 41mm to 95mm, dry flashover voltages up to 40kV, and wet flashover voltages around 22kV for standard 11kV units. Operational temperature ranges span -50\u00b0C to +100\u00b0C, with capability to function in high humidity or wet conditions without flashover issues.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div>