Insulators, typically composed of insulating components (such as porcelain or glass) and metal accessories (like steel legs, iron caps, flanges, etc.), are either bonded with adhesive or mechanically secured. Insulators are widely used in power systems, generally serving as external insulation and operating under atmospheric conditions. They are necessary to support the external live conductors of overhead transmission lines, power plants, transformer stations, and various electrical equipment, ensuring they remain insulated from the ground (or grounding objects) or other conductors with differing potentials.