Turnkey contract for installation of 14 nos. of additional 5 mva departmental power transformer along with associated 33 kv & 11 kv protection system and 11 kv bay at different power sub station in electric supply circle begusarai, darbhanga, saharsa, kishanganj and purnea under package-3 envelope under o&m capital head/internal resource fund (irf), o&m department, nbpdcl