Different Moisture Contents of Pressboard Effect on Electrical and Chemical Characteristics of Liquid Insulation

Jongvilaikasen, K.; Pumyoy, Suparat; Jariyanurat, K.; Maneerot, Sakda; Pattanadech, Norasage

doi:10.1109/cmd.2018.8535873

Cited by 1 publication

(2 citation statements)

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“…There are several important properties such as dielectric strength, flash point, viscosity, specific gravity and pour point and all of them have to be considered when qualifying new oil as transformer oil [8], [11,12]. Moisture in oil is one of a factor that can decrease the life-span of high power transformer [13][14][15] and the water content in the oil need to be tested periodically. This is because the presence of large water content can causes many problems for a power transformer including electrical breakdown between either its windings or one winding with neutral, increase in the amount of partial discharge and sundry minor problems [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…Moisture in oil is one of a factor that can decrease the life-span of high power transformer [13][14][15] and the water content in the oil need to be tested periodically. This is because the presence of large water content can causes many problems for a power transformer including electrical breakdown between either its windings or one winding with neutral, increase in the amount of partial discharge and sundry minor problems [13][14][15][16][17]. However, the coconut oil able to absorbs much moisture compare to the mineral oil due to the content of fatty acid in it [4,6].…”

Section: Introductionmentioning

confidence: 99%

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Virgin coconut oil dielectrical properties as electrical insulation material

Sauki¹,

Muhamad²,

Rasid³

2019

Bulletin EEI

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Mineral oil played an important role as insulating liquid such as to reduce failure, ageing effect, increase the life span and heat transfer agent. Mineral oil had a good dielectric strength and cooling performance but it had serious negative environmental impact like non-biodegradable, non-renewable resource and difficult to dispose when it deteriorates completely. Hence, virgin coconut oil (VCO) was chosen as alternative to replace mineral oil since it biodegrades completely without toxic and easy to get in the tropical country. Three dielectric tests were conducted to investigate the dielectric properties of VCO. Those were breakdown voltage, water content and kinematic viscosity. A study about the effect of the moisture level of VCO on the breakdown voltage and kinematic viscosity was also presented. VCO and mineral oil also undergone heating process to reduce moisture in sample. The study showed that VCO has good potential breakdown voltage with the ability to absorb a lot of moisture keeping the KRAFT paper dry. However, VCO had very high kinematic viscosity compared to mineral oil. Further, the rate of breakdown voltage decreases with increasing of moisture of VCO was lower than mineral oil.

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