tender for supply of spare trolley mounted transformers of 250 kva & 400 kva capacity for haridwar/rishikesh/roorkee s/s. , 250kva transformer , 250 kva 11kv/433v 3 phase copperwound oil immersed outdoor type level 2 distribution transformer with +5% to -5% insteps of 2.5% by off circuit tap changer , supply, fixing and testing of ht cable, jointing kit outdoor type , cost of installation and testing of transformer , cost of trolley needed for mounting 250 kva transformer as above with proper fencing for safety , 400 kva transformer 400 kva 11kv/433v 3 phase copperwoung oil immersed outdoor type level 2 distribution transformer with +5% to -5% insteps of 2.5% by off circuit tap changer , supply, fixing and testing of ht cable, jointing kit outdoor type , cost of installation and testing of transformer , construction of fencing of transformer cost of trolley needed for mounting 400 kva transformer as above with proper fencing for safety