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Home Excitation Characteristics of IronCore Reactors Effective Current  
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Effective Current
A nonsinusoidal current is expressed by Eq. 532 as follows
It should be remembered that the coefficients I_{1}, I_{2}, and I_{k} are the amplitudes of the various harmonic components in the current. If the current represented by Eq. 542 were passed through a noninductive resistance of R ohms, the voltage across that resistor would become
The average power, as read by an indicating wattmeter, consumed by the noninductive resistance R, can be expressed either as
or as
where I in Eq. 545 is the effective value of the current expressed by Eq. 542. Hence
which, from Eq. 538, becomes
or


Home Excitation Characteristics of IronCore Reactors Effective Current 