Abstract

The distribution transformer is an important tool in the power system. During operation, the transformer produces vibrations indicated on its performance. Transformer monitoring based on the condition of the transformer becomes very important due to mechanical failure resulting in different vibration patterns caused by winding, cores or both. Differences in the design and placement of sensors used can give different vibration measurement results on the transformer. This research designs piezoelectric accelerometer sensors to detect vibrations in a 20kV distribution transformer tank. The results show that the piezoelectric accelerometer sensor design has a reading accuracy of 5 × 10-5 m/s? in positive or negative acceleration, with the measuring instrument of vibration meter Lutron VB-8200 and proves that the main source of vibration caused by winding and cores located 2/3 from the bottom to the middle on the measurement of vibration on the secondary side of the transformer tank.

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