Model Approach to the Static Electrification Phenomena Induced by the Flow of Oil in Large Power Transformers

Static electrification phenomena induced by the flow of oil have been studied using a model duct of a forced oil cooled power transformer. The discharge observed in full scale model transformers at an excessive flow rate of oil was reproduced in the model duct. The leakage current to the ground induced by the flow of oil is a practical measure of the static electrification process.