supply of smps based ips conforming to rdso spec rdso spn 165 2023 version 4 0 amend ment 1 in re as per drg no sdo ips smps pi 4l re 002 warranty period 48 months after the date of deliv ery supply of smps based ips conforming to rdso spec rdso spn 165 2023 version 4 0 amend ment 1 in re as per drg no sdo ips smps pi 4l re 002 warranty period 48 months after the date of deliv ery installation testing and commissioning of smps based ips