The Effect Of Moisture On AC Breakdown Voltage Of Synthetic Ester Oil Undegone Different Moisture Removal Methods

Mat Isa, Syaharil (2016) The Effect Of Moisture On AC Breakdown Voltage Of Synthetic Ester Oil Undegone Different Moisture Removal Methods. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

Text The Effect Of Moisture On AC Breakdown Voltage Of Synthetic Ester Oil Undegone Different Moisture Removal Methods - Syaharil Mat Isa - 24 Pages.pdf - Submitted Version Download (254kB)

Abstract

Transformer is one of the valuable assets which used to deliver the electricity power to the whole nations. Inside the transformer is containing oil which its function is to cool down transformer from overheating and act as insulation for the windings. Generally, the mineral oil is used as the liquid insulator for the insulation purpose to prevent the transformer from breakdown. But unfortunately there are several weaknesses for the mineral oil. The weakness is not biodegradable, low moisture tolerance and also flammable. The ester oil has become one of the alternative ways to overcome the weakness of the mineral oil. The advantage of the ester oil is more biodegradable, excellent fire resistance and high dielectric strength. However, the occurrence of the moisture inside the transformer will affect the breakdown voltage of the insulation liquid to protect the transformer. This project will measure the effect of different moisture level on the ester oil in terms of its breakdown voltage by using breakdown tester set (OTS60PB) and also study on necessary method of the moisture removal technique in order to decrease the moisture contents inside the ester oil. The breakdown measurement comply with ASTM D1816 standard is used. For the moisture removal method, there are three techniques that been used which are by using vacuum, air ventilation and nitrogen gas treatment. Karl Fischer titration device is used to determine the water contents for those different techniques. From the analysis that been done, it is clearly shown that the breakdown strength decreases as the moisture contents increases. The breakdown voltage is the highest when nitrogen treatment is used compared to vacuum and air ventilation method. By doing this research, it is obvious that removing the moisture from the insulation oil will make the oil have great potential in overcoming electrical stress.

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