Six Sigma Analysis of Electrical Motors in Refi neries Combining Criticality Index and Condition Monitoring of Motors using Vibration Analysis

To achieve the goals of management for six sigma level breakdowns, zero accidents, and zero effect on quality of product along with least maintenance cost, the concept of RCM had helped engineers a lot. The primary need for RCM is deciding criticality index number and CM and PM frequency are decided thereafter based on criticality score ensuring the coverage of all the critical equipment. As CM and PM of all equipment is time consuming, more concentration should be given to equipment with higher criticality. Electric motors have seen to be widespread adoption in every application and their condition monitoring has received considerable attention in recent years. Motor’s abnormal vibration signals include its fault information and these vibration signal analysis is used to monitor motors to predict and prevent major problems. Condition monitoring using vibration analysis has achieved meaningful results in successfully diagnosing motors problems. This paper introduces a way for risk assessment approach to decide criticality index of equipment in petroleum refi nery and combining the same with CM technique like vibration analysis for motors in petroleum refi nery for achieving zero breakdowns in motors with the results derived from the past 3 years.