Supply Of Set Of Bushing Porcelain Insulators(top & Bottom) For The Main Transformer 7775 Kva In 3-phase Locos As Follows. 1) Dt 3/2000 Of Abb Drawing No. Hstn 310508. Qty/set. = 20 Nos. 2) Dt 3/1000 Of Abb Drawing No. Hstn 310507. Qty/set. = 10 Nos. 3) Dt 3/630 Of Abb Drawing No. Hstn 310506. Qty/set. = 10 Nos. 4) Dt 1/250 Of Abb Drawing No. Hstn 310500. Qty/set. = 20 Nos.