Porcelain post insulators for high-voltage lines A line post insulator is a steel insulator consisting of one or more insulators permanently glued on a metal base, sometimes with a cap, and can be double mounted on a metal base. The head bolt or one or several bolts are rigidly mounted on the supporting structure. It is used for insulating and supporting wires in AC power lines with a nominal voltage higher than 1000V, a frequency not higher than 100Hz, and an altitude not higher than 1000m. between 40°C. Line (solid) post insulators can replace pin insulators. Pin insulators are B-type insulators, which are prone to breakdown and damage during operation. Toughened glass insulators will self-destruct at this time, while porcelain insulators will not. Therefore, the electric industry department will spend a lot of manpower and material resources to conduct electrical inspection and preventive tests on porcelain insulators, which has certain shortcomings in terms of economy and safe power supply. Therefore, with the development of manufacturing technology, line (solid) post insulators appeared. This insulator has a solid insulator and is a type A insulator, so there is no need to worry about breakdown along the interior of the insulator during operation, which is a major advantage of it. Line pillar porcelain insulators are divided into eight grades of 95, 105, 125, 150, 170, 200, 250 and 325kV according to the rated lightning impulse withstand voltage value; according to the rated bending failure load value, they are divided into 3, 5, 8 and 12.5kN Four grades; according to the installation method, it is divided into two types: vertical installation and horizontal installation; according to the connection method with high-voltage wires, it is divided into two types: top binding type and top clamp type; according to the connection method between the steel foot and the base, it is divided into detachable Type (threaded connection) and inseparable type two. Model description: PS——line post type porcelain insulator; J——clamp type, binding type is not indicated; N—longer creepage distance (normal creepage distance is not indicated); the number after "—" means lightning full wave Impulse withstand voltage value, kV; The number after "/" is the bending failure load value, kN; Z—upright installation, horizontal installation is not indicated; S—threaded connection. GB/T 21206-2007 standard stipulates: R——line post insulator; The number after R indicates the bending failure load value, kN; the subsequent letter E or J indicates the outer or inner plastic installation of the metal accessory; the subsequent letters T, C, and H indicate the top binding type and vertically installed top clamp respectively type or top clamp type installed horizontally; the suffix number indicates the specified lightning impulse withstand voltage value, peak kV. 1. The insulator machine has high strength, low dispersion, safe and precise operation. 2. The low-temperature machine performance of the insulator is good. 3. Excellent stain resistance. 4. High seismic performance. 5. Low radio interference.