Book excerpt: This is the only guide available on the techniques of monitoring the condition of electrical machinery on-line. Text explains the fundamentals of construction for rotating electrical machines, describes modes of failure for them, and gives comprehensive coverage of the methods that can be employed to detect incipient faults. Chapters cover current monitoring techniques--electrical, chemical, mechanical, and thermal--and also offer discussion of some of the new developments now being introduced. One section is devoted to case studies, including the monitoring of turbogenerators, large drives in the oil industry, and high integrity machines operating in a power station. Contains over 100 illustrations, 20 tables, and extensive references.