Failure identification and analysis for high-voltage induction motors in the petrochemical industry

This paper gives a synopsis of condition monitoring methods, both as a diag nostic tool and as a technique for failure identification in high-voltage i nduction motors in industry. New operating experience data for 483 motor un its consisting of 6135 unit years are registered and processed statisticall y to ascertain the connection between motor data, protection, and condition monitoring methods, maintenance philosophy, and different types of failure s. The different types of failures are further analyzed to determine the fa ilure initiators, contributors, and underlying causes. The results have bee n compared with those of a previous survey, the "IEEE Report of Large Motor Reliability Survey of Industrial and Commercial Installations, 1985," In t he present survey, the motors range From 100 to 1300 kW; 47% of them are be tween 100-500 kW.