Title :
Fundamentals-a useful index for estimating residual life of motor insulation
Author :
Kimura, K. ; Iwabuchi, T. ; Morooka, K. ; Ishikawa, Y.
Author_Institution :
Mitsubishi Electr. Corp., Tokyo, Japan
Abstract :
During the period from 1955 to 1978, the insulation system of choice for motor windings in Japan was predominantly of the polyester type. Since there are still a number of polyester-insulated motors in the field, there is a demand for a reliable means of evaluating the residual life of these units, the ultimate goal being standardization acceptable to the industry. The present state of this effort in Japan is briefly reviewed. A simple but effective procedure for the diagnostic evaluation of motor life is offered. It is based on tests easily performed on the insulation and within the scope of the average motor repair shop facilities.<>
Keywords :
electric motors; insulation testing; life testing; machine insulation; organic insulating materials; polymers; Japan; motor insulation; motor life; motor repair shop facilities; motor windings; polyester; residual life; standardization; Aging; Coils; Dielectrics and electrical insulation; Failure analysis; Induction motors; Insulation testing; Life estimation; Mechanical factors; Power cables; Standardization;
Journal_Title :
Electrical Insulation Magazine, IEEE
