The increase of voltage, specific power, and efficiency in electrical assets, especially in electrified transportation and renewable generation, is requiring new electrical insulation system designs and reliability/risk/aging evaluations. This includes the use of power electronics, hybrid supply (AC and modulated AC), higher electric field and operating temperature, and packaging with reduced insulation size. This system focuses on the design of the surface insulation sub-system of components such as spacers, bushings, cable accessories, power electronics boards, PCB, and laminated busbars (LBB). The system is designed for the insulation and connectors/electrodes in a way that the surface partial discharge inception voltage (SPDIV) is not exceeded, under any operation condition and for any level of surface contamination.
