Transformer Magnetizing Reactance

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darkwhite87
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In the case of an open-circuit test of transformer, when I increase the supply voltage, i realize the magnetising reactance (Xm) decreases, why does this happen?
 
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darkwhite87 said:
In the case of an open-circuit test of transformer, when I increase the supply voltage, i realize the magnetising reactance (Xm) decreases, why does this happen?

You might be saturating it.