bids are invited for transformer 500 kva - supplying, installing, testing and commissioning of ac 3 phase 50 hz 500 kva capacity transformer step down, indoor type 11000/433 volts (at no load) all as per is:1180, copper wound, oil immersed, naturally cooled with external cooling tubes, core type, delta connected on primary (hv) side and star connected on secondary (lv) side in accordance with vector symbol dyn-11 (vector group-4) with neutral brought on secondary (lv) side & having tappings in equal steps of 2.5 % from (+) 5% to (-) 7.5% on primary side by means of hand operated off load tap changing gear, so as to change/correct l.t voltage on secondary side including provision of all necessary / standard fittings and fixtures as specified in technical specification and as directed by consignee. , dismantling existing transformers - dismantling of existingtransformer of capacity 500 kvafromsub station anddepositing to mes store yardall as directed by engr-in-charge. note - quoted rate is deemed to be inclusive of charges recurring in to & fro of transformer and t&p required for dismanting of transformer. total quantity : 1