Each disk of a porcelain or glass suspension insulator is rated at how many kV?

In the context of porcelain or glass suspension insulators used in electrical power systems, each disk is commonly rated at 11 kV. This rating indicates the maximum voltage that the insulator can safely handle without suffering breakdown or flashover, making it suitable for high-voltage applications in transmission lines.

The 11 kV rating is widely recognized and utilized in various electrical engineering applications, ensuring that the insulators provide adequate insulation under normal operating conditions. Understanding this rating is crucial for engineers and designers when selecting insulators for different voltage levels in power systems, as it helps in maintaining safety and reliability in electrical transmission.

The other voltage ratings, while potentially relevant in other contexts or for different insulator designs, do not reflect the standard rating for a single disk of porcelain or glass suspension insulators in most applications. Therefore, the choice reflecting 11 kV aligns with industry standards and practices.