In distribution network design, the classification and function of insulators are crucial for ensuring the safe and reliable operation of the power system. Main Functions of Insulators: Provide electrical isolation to prevent current leakage and short circuits. Provide mechanical support to withstand tension and environmental forces. Resist pollution, high temperatures, and aging to ensure long-term reliability and safety. Types of Insulators: Material: Glass, porcelain, and composite. Structure: Disc, pin, suspension, and tension insulators. Use: Suspension, pin, and tower insulators. Voltage Level: Low, medium, and high-voltage insulators.