A Preventive Maintenance Program for Hydroelectric Generator Windings

This paper describes a program for the preventive maintenance of hydroelectric generator windings. The program has been developed strictly from the operator´s viewpoint. It is intended to provide a practical means of determining the condition and reliability of the winding insulation, and in addition, reveal maintenance techniques necessary to lengthen the winding life and to assure reliable operation from one test and maintenance period to another.