In-service early indication of 500 kV circuit breaker function loss operated in PLN P3B Jawa Bali - Indonesia

Since year of 2004 PLN P3B Jawa Bali has been changing its maintenance strategy from time based to the combinations of time-based and condition-based maintenance. Currently, as part of the new strategy PLN P3B Jawa Bali has been implementing a visual inspection and early indication of equipment function loss by using visual inspection, in-service monitoring and on-line measurement. This early indication uses critical failure modes of visual inspection item and thermovision as its input. The critical failure modes are identified by using FMEA/FMECA which were developed based on statistical data and engineering senses. The output of the early indication are either 1,6 or 9 in which 1 represents bad, 6 fair and 9 good conditions. By using this in-service early indication of function loss, we will able to obtain symptoms to equipment failure earlier.