Theory & DesignCâu 86 / 110
In a three-phase, four-wire wye system serving nonlinear loads, which harmonic order adds arithmetically in the neutral?
a.2nd
b.3rd
c.5th
d.7th
Giải thích
Triplen harmonics, principally the 3rd, are in phase across all three phases and add in the neutral rather than canceling.
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