## Power factor of a transformer at 80%

PF is P / S in general. If the transformer is running at 80.1% of full load, the PF should stay the same right since

PF = 0.801P / 0.801S
= P / S

since if the transformer is running at 80.1% full load, the output S and output P would both be 80.1% right? So basically, no matter what load, the PF is constant since the percentage of full load of the transformer cancels out?
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 Recognitions: Homework Help The power factor not being exactly unity is due to what, exactly? I'm trying to understand this. The units of S , are they volt-amperes? Is the load considered purely resistive in all of this? What is the equivalent circuit model you are using for your power transformers? Does this give you a clue?

Recognitions: