Power Systems quality

An existing dry type transformer with a rated full-load current of 600 A is used to supply a non-linear load. The harmonic spectrum is given in Figure 4. The transformer winding eddy current loss under rated conditions at the point of maximum loss density is 15% of the local I 2R loss.

A). Determine the maximum loading of the transformer when supplying the given nonlinear load. Use the order harmonics up to 15th .

B). If K-rated transformer is used, what is the K-rating of the transformer?

Sample Solution

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