The high-voltage post insulator is composed of an iron cap, tempered glass parts, and steel feet, and is glued together with cement adhesive. All products adopt a cylindrical head structure, characterized by small head size, light weight, high strength, and large creepage distance, which can save metal materials and reduce circuit costs. To meet the needs of live working, traditional domestic structural shapes are adopted on the brim of the hat. High voltage post insulators are generally made of insulating components (such as porcelain parts) and metal accessories (such as steel feet, iron caps, flanges, etc.) glued with adhesive or mechanically clamped. Insulators are widely used in power systems and generally belong to external insulation, operating under atmospheric conditions. The external live conductors of overhead transmission lines, power plants and substations, as well as various electrical equipment, must be supported by insulators and insulated from the earth (or grounding objects) or other conductors with potential differences. Indoor post insulators are used for indoor power plants, substation distribution devices, and electrical equipment with a rated voltage of 6-35kV, to insulate and fix conductive parts. Insulators are suitable for environments with temperatures ranging from -40 ℃ to+40 ℃. The installation site has an elevation of no more than 1000m for ordinary types and no more than 4000m for plateau types. Insulators are divided into three structural types based on their adhesive structure: external adhesive, internal adhesive, and combined adhesive. Insulators are classified according to their rated voltage and bending strength level
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