Professional Answer: While porcelain insulators have a long history of reliability, composite insulators offer several key advantages. Their core is typically a fiberglass rod, providing high mechanical strength, while the silicone rubber shed provides excellent insulating properties. Key benefits include:

• Lighter Weight: Composite insulators are significantly lighter, making them easier and safer to transport, handle, and install.

• Superior Hydrophobicity: The silicone surface of composite insulators repels water, which minimizes the risk of flashovers in wet or polluted conditions.

• Better Vandalism Resistance: Unlike brittle porcelain or glass, composite insulators are less susceptible to damage from vandalism, such as being shot at or struck by objects.

• Enhanced Performance: They exhibit better performance in environments with high levels of pollution, salt spray, or dust, reducing the need for frequent cleaning.