Transformer tests Home › Electrical Engineering Forum › General Discussion › Transformer tests This topic has 0 replies, 1 voice, and was last updated 13 years, 4 months ago by raghvendraprasad. Viewing 1 post (of 1 total) Author Posts 2010/12/14 at 5:58 pm #10305 raghvendraprasadParticipant IN oc test why Hv is left open? Why LPF wattmeter is used UPF in sc test why LV is shorted?Why UPF wattmeter is used? Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In