Devices capable of withstanding voltage and mechanical stress between conductors installed at different potentials or between conductors and grounding components. Insulators come in a wide variety of types and shapes. While the structures and appearances of different types of insulators may vary greatly, they are all composed of two main parts: insulating components and connecting hardware.

Insulators are specialized insulation controls that play a crucial role in overhead transmission lines. In earlier years, insulators were commonly used on utility poles. Over time, they evolved to include many disk-shaped insulators mounted on the ends of tall, high-voltage transmission towers. These are designed to increase the creepage distance. Typically made of glass or ceramic, they are referred to as insulators. Insulators should not fail due to various mechanical and electrical stresses caused by changes in environmental and electrical load conditions, as this would negate their significant function and could damage the entire line's usability and operational lifespan.