bids are invited for testing service for on-board /commissioned equipment/ instrument related to plant residual life assessment test of 50 mvar bus reactor (bhel make, s.i. 6005432)” at 400 kv sub-station, moradabad. residual life assessment by solid insulation testing / electrical testing of transformer:-  insulation resistance (ir value)  polarization index value (pi value)  polarity test  magnetizing current test  voltage ratio test  checking of prv, oti/wti and buchhloz relay  tan delta and capacitance test of winding  tan delta and capacitance test of bushing  di-electric frequency response analysis (dirana)  sweep frequency response analysis (sfra)  • degree of polymerization test total quantity :