Condition monitoring for small class 1E components

Early detection of degradation of electrical and mechanical parameters are essential to avoid expensive failures of a system. Extensive on-line monitoring of key auxiliary system components can allow effective and reliable plant operation. The key components are determined to be motors, cables, circuit breakers, solenoids, and transmitters. Presently surveillance is performed on these components to maintain a high degree of reliability of the plant. A cost effective and justified condition monitoring can alleviate some of the surveillance cost and increase the reliability further. In order to cost effectively apply the condition monitoring, the number of components to be monitored should be minimized. The selection of components can be made by event-tree method.