supply of od type 3 phase 500 kva, 11/.433 kv cu wound transformer star-delta with first fillingof oil and the following addl. spares ht bushing with complete metal parts-3, lt bushing with complete metalparts-4 nos., gasket-01 no., silica gel breather with charge 01 no. complete etc as required. conf. to is:2026 orlatest, make-m.e.i., eastern transformer and ariva.