KPTCL to replace mineral oil with ester oil in high-capacity transformers across Karnataka

As part of its modernisation strategy, the utility has already replaced conventional mineral oil with ester oil in 45 high-capacity transformers. | Photo Credit: FILE PHOTO Despite the price of ester oil being higher than mineral oil, Karnataka Power Transmission Corporation Limited (KPTCL) has planned to replace mineral oil with ester oil in high-capacity transformers across the State in the next one year.A senior official from the KPTCL said, “The ester oil is derived from vegetables, and it acts as a coolant and because of its high flash point, the transformer resists ignition. It is also highly biodegradable, non-toxic, and helps extend the lifespan of the transformer. Rather than incurring substantial capital expenditure on replacing ageing transformers during rains, the KPTCL has ado