Application of multifunction generator protection systems

The introduction of microprocessor technology enabled multiple protection functions to be integrated into a common protection platform which has advantages when applied to generator protection. This paper provides an insight into industry application experience in using multifunction generator protection systems on various sizes and types of generators. Included are discussions on application and performance differences between multifunction protection systems and single function static and electromechanical relaying devices. Also included is a summary of the various types of tests performed on the multifunction protection systems by the user. The paper additionally addresses the need for application of redundancy and backup protection when applying multifunction generator protection systems on large or important generators.