Design Manufacture Testing Supply and Retro-filling of FR3 Natural Ester oil to the in-service 7 Nos of Power Transformers of capacity 100MVA 220/110 KV including necessary modifications to the existing transformers & OLTCs conforming to KPTCL specifications & commissioning and buy back of released mineral oil from the transformer on TTK basis at various sub stations pertaining to various Division of Transmission Operation Zone Bagalkot