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Transformer's primary winding power consumption

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Tukan

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Hello, can somebody give me advice how to calculate the power consumption of the transformer's primary choke, when no load is applied to secondary winding please?

My transformer parameters are:

primary winding voltage rate = 230V
primary choke impedance = 2000 Ohms

I just know only abut this formula P = V * I * cos(phi) but this is probably unusable for me.

Many thanks.
 

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