Insulators, typically composed of insulating components (such as porcelain or glass pieces) and metallic fittings (like steel legs, iron caps, flanges, etc.), are either bonded with adhesive or mechanically clamped together. Insulators are widely used in power systems, generally serving as external insulation and operating under atmospheric conditions. They are essential for supporting the external 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 electrical potentials.