Optimum replacement cycle of DC high-speed circuit breaker parts

The replacement cycle of the equipment is usually decided by the technical specification provided by its manufacturer. However, it may vary according to the usage environment of equipments. Therefore, accumulated failure history of equipments in the field is important to determine their lifespans. In case equipments are deployed in many sites it is not hard to gather enough failure data in a short period of time. On the other hand, the equipment installed in a very limited industrial field requires a long period time to acquire the sufficient amount of accumulated failure data. In this study, we aim to analyze an optimal replacement cycle of 3 types of parts used in DC high speed circuit breaker using a statistical analysis based on the fault history. The results can be applied to set up an efficient maintenance plan to reduce the unnecessary labor and cost.