Weighting Characteristic For Kraft Paper Immersed In Mineral And Vegetable Insulation Oil

Nornazurah, Nazir Ali (2015) Weighting Characteristic For Kraft Paper Immersed In Mineral And Vegetable Insulation Oil. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 pages) Weighting Characteristic For Kraft Paper Immersed In Mineral And Vegetable Insulation Oil 24 Pages.pdf - Submitted Version Download (424kB)

Abstract

Insulation plays a very important role in an oil-filled transformer. In fact, the importance is undeniable since insulations can determine the lifespan of a transformer. Insulations failure has been reported as the leading cause for transformer failure occurrences. Damage in insulation part might affect the performance of the power transformer and hence the transformer life. Hence having a proper Kraft Paper thickness and insulations oil is the key in obtaining a transformer with great performance and longer lifespan. Thus, this research is particularly purposed to be studied. The objectives of this research are to study the effect of thickness of Kraft Paper with its absorption rate and to verify the absorption rate of Kraft Paper after being immersed in mineral and vegetable insulation oil. The performance of Kraft Paper will be analysed using three different thicknesses which are 0.7mm, 1.4mm and also 2.1mm and two types of insulations oil which are Hyrax Hypertrans a mineral oil and the Palm Fatty Acid Ester (PFAE) a vegetable oil. The performance of the Kraft Paper will be observed by their absorption rate. It is found that the difference in thicknesses do effect the absorption rate of the Kraft Paper, the higher the thicknesses the longer the time taken to reach concentration. In 0.7mm, not many differences were observed in the absorption ratio and the difference can be considered small. However, in 1.4mm, the Kraft Paper has 9.4% higher absorption ratio at the concentration state compared to mineral oil. This is further supported with the higher initial intake for Kraft Paper in PFAE with value of 0.0136%/s compared to 0.0117%/s for Hyrax Hypertrans. In 2.1mm, the absorption ratio of vegetable oil is also higher than mineral by 0.7%.The vegetable oil also achieved concentration faster than mineral oil. This is further supported with higher initial rate intake of vegetable oil with value of 0.0075%/s compared to only 0.0065%/s in mineral oil. Hence it is proven that Kraft Paper immersed in vegetable oil has better performance compared to the one immersed in mineral oil.

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