Enhancing The Breakdown Voltage Of Mineral Oil Mixed With Natural Ester Oil

Hashim, Ahmad Firdaus (2017) Enhancing The Breakdown Voltage Of Mineral Oil Mixed With Natural Ester Oil. Technical Report. UTeM, Melaka. (Submitted)

Text Enhancing The Breakdown Voltage Of Mineral Oil Mixed With Natural Ester Oil - Ahmad Firdaus Hashim - 24 pages.pdf - Submitted Version Download (456kB)

Abstract

Insulating liquid in the power transformer applications functioning as a coolant and an insulator. Till now many researcher do many research and find an alternative in replacement of conventional Mineral Oil (MO) that usually used in the transformer. Besides that, Palm Fatty Acid Ester (PFAE) oil is one of the Natural Ester Oil (NEO) that offers many advantages and because of that reason, PFAE oil is preferred and suggested to be used in mixed with MO in order to enhance the breakdown voltage (BDV) for this project. Thus, the main objective in this study is to obtain the best ratio of mixed insulating oil between MO and PFAE oil without reducing too much quantity of MO in order to enhance the BDV and ensuring the best ratio is non-corrosive and has great flash point. The BDV test is carried out using Megger OTS60PB in accordance with the ASTM D1816 standards with 1 mm electrode gap and Coulometric Karl Fischer Titration in accordance with the ASTM D1533 standard is used for the water measurement. Hence, the measurement of corrosive sulfur is performed using Method B from ASTM D1275 standard while Pensky-Martens closed cup tester according to ISO 2719:2002 standard is used for flash point measurement. Throughout the experiment that conducted, the ratio of 70% MO + 30% PFAE represents the best ratio in enhancing the BDV with the properties for flash point which is 156°C. Besides that, the ratio of 70% MO + 30% PFAE has great properties for corrosive sulfur where the copper strip that immersed in insulating oil for this ratio shows slight tarnish or other word is non-corrosive. Hence, it is take into account of 30% of ester content of PFAE oil can improve the dielectric strength without degrade the heat transfer and gives less significantly BDV when presence of moisture content as well as non-corrosive with great the flash point measurement.

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