“Supply of 400 KVA, 3Ⴔ, 50Hz, 11/0.433 KV, Dyn – 11, outdoor type copper wound Transformer as per IS: 1180 Level - I and 11 KV, 3 Ⴔ, 50 Hz Oil immersed, indoor type, floor mounted, HT isolator switch fuse unit with auto trip arrangement at River Research Institute, Haringhata, Dist.:- Nadia ". (EXPIRED)