Implementation of Certainty Level (CL) to Condition Assessment Factor (CAF) Index on High-Voltage Circuit-Breaker (HVCB) on Sulmapana Region

Abstract

Condition assessment factor (CAF) for the high voltage circuit breaker (HVCB) developed by the PT PLN Transmission Division of Sulawesi, Maluku, Papua and Nusa Tenggara is an HVCB condition assessment method based on its periodic maintenance data. CAF HVCB uses 6 parameters, which are Contact Resistance, CB Timing, Insulation Resistance, Insulation Quality Test, Anomaly and CB Accessories. Each parameter produce score level and aggregate with different weighting factor to generate CAF value. According on actual conditions, one of the obstacles to generate CAF value is the incomplete of periodic maintenance data. Certainty Level (CL) needed to be included as information with CAF to overcome the problem of incomplete data. CAF and CL are implemented for 185 HVCB based on periodic maintenance data in 2021. The results of the CAF value show that most of the HVCB are in good condition with a high CF value and CL value. On the other hands, vigilance for low CAF and CF values needs to be exercised to ensure that the HVCB maintenance or rescheduling strategy is effective and well planned.