Study Of Electrical Discharge Effect On The Natural Ester Insulating Oils Properties

Azmi, Mohd Aizzat (2018) Study Of Electrical Discharge Effect On The Natural Ester Insulating Oils Properties. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) Study Of Electrical Discharge Effect On The Natural Ester Insulating Oils Properties.pdf Download (427kB)

Abstract

Natural Ester Insulating oil NEI is an environmental friendly source due to its high rate biodegradability which is very environmental friendly. Although, the cooling properties of the natural ester oil are poorer than mineral oil it is still widely used because of its flash point and fire point and lower fire risk. The natural ester insulating (NEI) oil PFAE and Midel eN had been chosen to investigate the effect of electrical discharge. In this research work, the oil sample need to pass the initial condition by following ASTM D974, D6871, D1816 and D1533 standards in terms of acidity, moisture and breakdown (BDV) before proceed to the next stage. Hence, the treatment process will be performed if the moisture content of the oil sample does not achieve the standard. Next, partial discharges inception voltage (PDIV) will be tested on the test cell to determine the PDIV value of oil sample. All the equipment and setup for PDIV is according to IEC 61294 standard. Next, the electrical discharges will apply from 200 until 1000 discharges with a constant voltage based on the PDIV value. Electrical discharge is the emission and transmission of electricity in an electric field applied to the medium such as liquid. Hence, this study will determine the effect of the electrical discharge to the physicochemical properties in terms of moisture content, acidity level and breakdown voltage of the Midel eN and PFAE. The properties of PFAE and Midel eN after electrical discharge test also will be analyzed to compare with initial properties of natural ester insulating (NEI) oil. According to the experiment conducted, the PFAE oil change is not significant in terms moisture content, acidity and breakdown voltage (BDV) compared to Midel eN oil. This result is due to its saturated fatty chain acid with good oxidation stability. The BDV of PFAE oil also not much affected by the high electrical discharges. Hence, it shows that PFAE has better performance in terms of good oxidation stability and also the BDV value that can withstands.

Actions (login required)

View Item