N NissanTitan08 New member Nov 13, 2007 #1 I have a 480v 3p primary delta primary, 120/240 secondary Y transformer. Why am I only getting one leg working in the panel.
I have a 480v 3p primary delta primary, 120/240 secondary Y transformer. Why am I only getting one leg working in the panel.
charlie b Moderator Staff member Location Lockport, IL Occupation Semi-Retired Electrical Engineer Nov 13, 2007 #2 What are the symptoms? Just saying it doesn't work is not enough information for us to help you.
J jim dungar Moderator Staff member Location Wisconsin Occupation PE (Retired) - Power Systems Nov 13, 2007 #3 NissanTitan08 said: I have a 480v 3p primary delta primary, 120/240 secondary Y transformer. Why am I only getting one leg working in the panel. Click to expand... No you don't. You have either a delta-wye of 480-208Y/120 3PH 4w, a delta-wye of 480-240Y/136 3PH 4W, or a delta-delta of 480-240/120 3PH 4W. What 10 voltages are you getting? Vab Vbc Vca Van Vbn Vcn Vag Vbg Vcg Vng
NissanTitan08 said: I have a 480v 3p primary delta primary, 120/240 secondary Y transformer. Why am I only getting one leg working in the panel. Click to expand... No you don't. You have either a delta-wye of 480-208Y/120 3PH 4w, a delta-wye of 480-240Y/136 3PH 4W, or a delta-delta of 480-240/120 3PH 4W. What 10 voltages are you getting? Vab Vbc Vca Van Vbn Vcn Vag Vbg Vcg Vng