Application of multifunction generator protection systems

The introduction of microprocessor technology enabled multiple protection f unctions to be integrated into a common protection platform which has advan tages when applied to generator protection. This paper provides an insight into industry application experience in using multifunction generator prote ction systems on various sizes and types of generators. Included are discus sions on application and performance differences between multifunction prot ection systems and single function static and electromechanical relaying de vices. Also included is a summary of the various types of tests performed o n 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.