Which type of bushing is commonly used in electrical systems?

The condenser type of bushing is commonly used in electrical systems because it is specifically designed to support electrical conductors while allowing for insulation and safety. This type of bushing integrates the capability of a capacitor, which provides a means to manage electric fields and minimize electrical losses. Condenser bushings are essential in high-voltage applications, as they can effectively handle the electrical stress and maintain the integrity of the insulation system, preventing failures that could arise from electrical discharge.

The other options do not offer the same level of performance or suitability for electrical applications. For example, paper insulated bushings may not provide the necessary durability and moisture resistance needed in many electrical environments. Plastic bushings, while more widely used in less critical applications, often lack the strength and electrical properties required for high voltage. Wooden bushings are not used in modern electrical systems because they do not offer the necessary insulation properties and can degrade over time, leading to reliability concerns.