Erection, testing, commissioning including Charging, Trial Operation and handing over to Customer of 20 (twenty) sets (including two sets of spares) of Generator Transformers(GT) with auxiliaries, 1 (one) set of Shunt Reactor(SR) with auxiliaries, 26 (twenty-six) nos. of Dry Type Transformers(DTT) with auxiliaries and 6 (six) sets Isolated Phase Bus Duct(IPBD) with auxiliaries at Underground Transformer Cavern, Power House Cavern, Pot Head Yard and other various locations along with Material Management(MM) including Receipt, Unloading, Handling, Verification of Material, Storage, Preservation (as applicable), Issue of material, Loading, Local Transportation to work front, Detailed Record keeping of MM, Handing over of Spares to Customer at 6X170 MW Punatsangchhu-II Hydroelectric Project, Wangdue Phodrong, Bhutan.