Transformer Losses

[Omer]

The total loss at full load of a single phase transformer is estimated to be 2000 W. The transformer maximum efficiency occurs at 45% of the full load. The estimated no load loss of the transformer is approximately?

 

[rg1]

At Max eff. the core losses are equal to copper losses. Start from assuming core losses to be equal to x. You must each the answer. Okay I will do it. 

Let I be the full load current

At max eff (.45I)**2 X R=x

This gives me Full load losses= I**2 X R=4.94x

Now total losses at full; load= I**2 X R +x= 4.94x+x=5.94x=2000, gives me x= 336.8 and that is the answer. 

 

[Jbone27 PE]

These can almost always be traced back to Decepticons