"These oil-based transformers are being replaced with their dry counterparts in several residential and commercial buildings, keeping the safety, environmental concerns and fire hazards in mind," said a BYPL official.
He said oil-based transformers have been replaced already with the safer dry transformers in 35 group housing societies and commercial buildings in East and Central Delhi.
"The dry transformers have many advantages � both for the consumers and the discom - over their oil-based counterparts. Main among them is elimination of fire hazards. As the name suggests, 'oil-based' transformers contain mineral oils, which are combustible in nature and any leakage can be a potential fire-hazard," the official said.