A power transformer outage has a dramatic financial consequence not only for electric
power systems utilities but also for interconnected customers. The service reliability of this …

The development of reliable, environmentally safe and economic insulating oil for the
transformer is an endless effort of the electrical industry. Recent research is based on …

The effect of residual mineral oil on the AC breakdown strength of vegetable oil is widely
studied to understand vegetable oil's reliability and dielectric integrity in retro-fitting a …

Green insulating fluids are playing a vital role in insulation design of the distribution
transformers. Traditionally used mineral oil has lesser biodegradable and low fire resistant …

Thermal aging of natural ester oil shows drastic reduction in partial discharge inception
voltage (PDIV) and a significant variation is observed only above a certain aging time, under …

In this work, thermal aging aspects of mineral oil, ester oils (synthetic and natural), mixed oil
have been reported. All the samples were thermally stressed at 110° C, 140° C, 160° C, and …

This paper investigates the dissolved gases evolution in transformer oil under combined
DC/AC electrical-thermal stress. Dissolved gases detected in transformer aged insulation oil …

The intent of this work is to evaluate the influence of cellulose insulation paper on gassing
tendency of transformer oil under electrical discharge conditions. For comprehensive …

The dielectric performance of mineral oil and natural esters is still a challenge that has been
studied for many years to attain the best liquid insulation for power transformer. With the …

This study summarises the results of an experimental investigation on the stability of mineral‐
based oil mixtures when they are confronted with different ratios of synthetic ester under …