I have removed a UPS transformer. It is a Class B Viking transformer. Its primary side has 4 wires coloured black, green, blue and yellow. I found resistance as follows- 1. Black to Green - 17 ohm 2. Black to blue - 14 ohm 3. Black to yellow - 15 ohm The secondary side have 2 thick wires and it's resistance is 0.5 ohm
Now my question is if I hook up 230 V between black and green will it draw 13.5 Amperes? I don't think that much current will be drawn. Where I am wrong? Actually, I want to calculate the secondary winding's max current output but my multimeter doesn't read Amperes. But by transformer formula, I can find secondary current if the primary current is known. As Vp/Vs = Is/Ip = Np/Ns
My calculation - V=IR I = 230/17 = 13.5 A Seeking help, Thanks.
Edit - For 230V input Secondary gives 6 Volts.