Development of inspection and preventive maintenance Systems for transformers: A case study of food processing factory Minburi 2

Abstract

In the food processing factory Minburi 2, transformers are important electrical devices. Since the transformers had stopped working because of breakdown, the production would be stopped which caused to be unable to produce continuously and deliver the goods to customer on time. Moreover, the maintenance cost was very high as well. Therefore, the cost and time of preventive maintenance were chosen as indicators. From the study of the current situation, the real root cause was insufficiency of the details of checklist for preventive maintenance. From the improvement of the preventive maintenance checklist details, they could be divided into 3 groups which were checklist for external parts, internal parts and electrical tests. From the result of improvement, it was found that the effective preventive maintenance reduces 96.42% of maintenance cost and 94.40% of maintenance time, respectively.