What are the three types of insulators used?

The correct answer identifies three key types of insulators commonly used in electrical applications: pin, suspension, and strain insulators.

Pin insulators are typically mounted on poles to support overhead lines and are designed to hold the wire securely while preventing electrical leakage. They are essential for low to medium voltage applications where the wire runs horizontally.

Suspension insulators are used in high voltage power transmission lines. Their design allows them to effectively hang and support the weight of the conductor while providing insulation from the supporting structure. They are often arranged in a series to provide the necessary insulation distance and can accommodate the flexing of the line due to wind or the weight of ice.

Strain insulators serve to manage the tension in the wire when pulling angles or supporting large spans are present. They are crucial in areas where the wire tension must be maintained without increasing the risk of mechanical failure at the junction points.

Understanding the functions of these insulators illustrates their importance in maintaining safety, performance, and reliability in electrical transmission systems.