Indonesia Conference Directory

Transformer had been widely used for supplying electric power to many motors, such as electric pumps, fans, or conveyors. The motor voltage may vary that is depending on its power and speed between one to another motor. The load needs the transformer which generate the proper voltage. Unfortunately, the working performance of transformer is decreasing because of its daily operation. In order to observe the working performance, the repetition of the transformer technical assessment is needed. This study provides the periodical inspection of high power transformer in maintenance and outage condition in the one of utility site in Indonesia. The checking activity maintains the eligible performance of the user device. The measurement of Sweep Frequency Response Analysis (SFRA) in the 5th unit had been done once in every six years. The measured result was obtained from 2007 until 2013. SFRA test diagnoses the characteristics of transformer winding and core by injecting low voltage at a certain frequency.