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Interpretation of the rating of a real transformer 
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#1
Aug1714, 03:50 AM

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The rating of a real transformer is 15 kVA , 2300/230V then can we say that the primary rms is 2300 V or can we say that the secondary rms is 230 V or both.
To clarify further, suppose to solve for certain characteristics of this transformer like primary current and secondary current i use the equivalent circuit equation of the transformer referred to the primary side as: Vp = aVs + Req*Ip + jXeq*Ip Then what should i use for Vp or Vs in the above equation looking at the rating of the transformer. 


#2
Aug1714, 06:43 AM

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Hi arpansen, welcome to the famous Physics Forums!
The primary would be 2300V and the secondary 230V. Possibly (though I'm not certain) there may be a convention that the specification follows the form primary:secondary. It would be logical to have such a convention, anyway. In practice, I can't think of a case where a power utility would need to step up from 230 to 2300. In the event of such a rare need, I'm sure this would be clearly spelled out in the specs. Power engineering is a very pragmatic field. You can work on the basis there's no one trying to trip you up. 


#3
Aug1714, 06:49 AM

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Usually.



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