Home › Electrical Engineering Forum › General Discussion › 3 phase load loss of YNyn0 transformer › Re: 3 phase load loss of YNyn0 transformer
2011/10/01 at 11:48 am #12540
Spir Georges GHALI
the 3 phase power tansformer load loss measured by 3 wattmeter method. the total losses is sumation of w1+w2+w3=total losses
but as 3 kimbs of transformer is identical but w1 w2 w3 are not identical why this happens
You talk about the ” Copper Losses “, and we know that losse for each coil is : I² x R, that means the value is depending on 2 factors. Assume now that R has the same value for all coils ( it's 100% theoric ) the values for W1, W2, & W3 are depending on the circulated current in each coil, so, even if the currents are the same the R1, R2, R3 haven't 100% the same value.