Performance evaluation based on symptom, failed-type and obsolescence criteria of high voltage circuit breaker

The requirement to renovate the deteriorated and aging electrical asset is now playing a significant role on the quality of electrical supply. Thus this paper presents the performance evaluation of 115 kV circuit breaker in power substation. The degraded high voltage circuit breakers should be assessed and clearly identified as supported reasons for planning the renovation task of electrical asset. This performance assessment based on symptom, failed-type and obsolescence criteria are used to clearly identify the visible deterioration. The proposed method was implemented with sixteen circuit breakers in two high voltage substations in Thai electrical utility as examples for illustrating the application of the method. The results show that performances of high voltage circuit breakers are in three stages for healthy, moderate, and risk performance. In the risk stage, the circuit breaker should be intensively cared. The proposed method can be further adapted to other high voltage equipment in power substation.