replacement of 7.5 mva damaged transformer by new 10 mva transformer with allied electrical work at 100 kv substation, pise.-1 replacement of 7.5 mva damaged transformer by new 10 mva transformer 2 sitc of 10 mva transformer 3 400 sq mm 3 core aluminium armoured cable for 3.3 kv ( fresh stock ) 4 sitc of current transformer 5 lightning arrestors 6 sitc of latest fire protection system 7 2.5 sq mm copper armour control cables 8 aluminium tubular busbar 9 supply of transformer oil 10 testing of existing circuit breaker 11 supply of busbar clamps 12 buy back of old 7.5mva transformer with aluminium cable