Abstract
Distribution Transformers are one of the imperative equipment in power system. The insulation design has an important role because it continuously energizes in a day. Due to electro mechanical stresses the operating temperature of distribution transformer will be increased which maintains with in limit using liquid dielectrics. Traditional mineral oil is used as liquid dielectrics in Distribution Transformer. Due to lack of fossil fuels and lesser biodegradability characteristics of mineral oil, the alternating liquid dielectrics are important. In this research work viscosity of pongamia pinnata oil is measured using PLINT TE 62 Bench Viscometer as per ASTM D445 standard .Water content analysis of the oil sample has to be measured by weight balance method and Breakdown strength of oil sample was measured by Nutronics oil test set as per IEC 60156. From the experimental analysis, the viscosity of pongamia pinnata oil is low as compared to RBDPO, Soyabean oil, Coconut oil and Sunflower oil. The moisture content of pongamia pinnata oil is significantly reduced during aging period and the average breakdown strength of pongamia pinnata oil is higher than that of conventionally used mineral oil.
Highlights
The first oil cooled Transformer was introduced by Brown of Germany in the year 1890 [1]
Several decades in the transformer mineral oil is used heat transfer and insulation medium, for the reason that of its physical and chemical properties is suitable for use as a liquid dielectrics availability and low cost of mineral oil
In this paper investigate the viscosity of pongamia pinnata oil as per ASTM D445 standards
Summary
The first oil cooled Transformer was introduced by Brown of Germany in the year 1890 [1]. First availability of fossil fuels because mineral oil is extracted from fossil fuels; a day’s natural resources of petroleum products are rapidly decreased. It has lesser biodegradability characteristics [6]. Because of mineral oils are made upon hydrocarbon components with different molecular structure which is resists degradation behaviors of mineral oil Due to such phenomenon several recharges are involves vegetable oils is used as a liquid dielectric in transformers. Because vegetable oils are more viscous than the conventionally used insulation oil This is used in reducing the fluid flow in the windings, cooling ducts and increases the operating temperature of the transformer. That breakdown strength test is conducted and compared with traditionally used mineral oil
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