tender for supply & retrofitting of numerical bus bar protection system at 400 kv sub-station, unnao - supply, retrofitting & erection, testing & commissioning of numerical bus bar protection system on 400 kv two main and transfer bus scheme (complete work in all respect) at 400 kv sub-station, unnao. as per details given below :- 2 supply of numerical bus bar protection system (centralized type) suitable for 18 bays (2m+t bus scheme) at 400 kv level ( non-redundant). 3 retrofitting, erection, testing & commissioning of relays along with testing kit andall consumables like lugs/control wires/ferules/ retrofit plate /blanking plate etc