Best-in-Class Stator Winding Insulation System for Large Rotating Machines with Enhanced Dielectric Performance

This paper provides an overview on stringent requirements for stator windings that are used in petrochemical, power utilities and nuclear plants. For nuclear applications, it is critical that a machine must be designed for a Design Basis Accident (DBA), refers to a specific accident scenario that a plant design must consider and prepare for, such as a Loss of Coolant Accident and built to withstand without loss to the systems, structures, and components necessary to ensure public health and safety. Stator winding insulation system can be quite complex due to the interactions of materials and geometry; therefore, testing is the most appropriate method for qualification. For utilities, Petroleum and Chemical Industry standards such as IEEE, IEC and API are followed to qualify a reliable system suitable for service life as specified in API. The proposed insulation systems (Best-in-Class) after going through stringent qualification program are also implemented for services industry with acceptable thermal, electrical and dielectric performance.