Influence of Gelling in Natural Esters Under Open Beaker Accelerated Thermal Aging

Rao, U. Mohan; Fofana, I.; Rózga, Paweł; Picher, P.; Sarkar, Dilip; Karthikeyan, R.

doi:10.1109/tdei.2022.3217995

Cited by 15 publications

(1 citation statement)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is counterpoised by adding electronic scavengers to the liquid [22]. Due to less oxidation stability and glycerin concentration, application of esters in cold climatic regions is questionable [24]. The popular approach to improve oxidation stability and reduce the pour point is to add inhibitors and pour point depressants, respectively, into the liquid.…”

Section: Discussionmentioning

confidence: 99%

Analysis of Breakdown Voltage of Low Pour Point Synthetic Ester Insulating Liquids Under Lightning Impulse Voltage of Both Polarities

Jayasree,

Fofana,

Rozga

et al. 2024

IEEE Trans. Dielect. Electr. Insul.

Self Cite

View full text Add to dashboard Cite

In this article, lightning impulse breakdown behaviour of two low pour point synthetic ester liquids is presented in comparison to a typical synthetic ester at both positive and negative polarities. Traditional mineral insulating oil has been also considered for reference purposes. A detailed breakdown behaviour analysis of the four test liquids under a non-uniform field (medium gap, point-plane electrode system) and quasi-uniform field (smaller gap, U-plane electrode system) is envisaged. The lightning impulse breakdown measurements based on the source voltage waveforms and light activity during the discharge process are presented. The Weibull breakdown failure rates and streamer velocity during the breakdown of different liquids for all the cases (+/-polarities and both electrode configurations) are reported in support of the discussions. In the case of non-uniform fields, the lightning breakdown voltage of the low pour point liquids is found to be higher than typical synthetic esters and is comparable to mineral oil under both polarities. While in the case of quasiuniform field, the lightning breakdown voltage of the low pour point liquids is found to be lower than mineral oil and comparable to the typical synthetic ester under both polarities. These findings add to limited knowledge on the application of esters in cold countries and allow insulation designers to estimate the behaviour of the low pour point synthetic ester liquids under lightning conditions.

show abstract

Section: Discussionmentioning

confidence: 99%