Harmonics in the exciting current of transformers . degrees . PIFTH HARMONIC . 50 0 i 0 cos50I icos5©0 sin5©0 isin500 50 - ^ 5 -8 2 cos5©.139 - 4 ) cccos(595 5 .284 50 .643 .766 -32 .848 100 - .97 .984 18 .951 150 .5 68 .375 .767 200 118 250 168 300 .5 218 350 .984 268 - .0717 400 .766 .64 2 318 .743 450 12 0000 0000 368 .99 5C0 .643 418 .53
Harmonics in the exciting current of transformers . degrees . PIFTH HARMONIC . 50 0 i 0 cos50I icos5©0 sin5©0 isin500 50 - ^ 5 -8 2 cos5©.139 - 4 ) cccos(595 5 .284 50 .643 .766 -32 .848 100 - .97 .984 18 .951 150 .5 68 .375 .767 200 118 250 168 300 .5 218 350 .984 268 - .0717 400 .766 .64 2 318 .743 450 12 0000 0000 368 .99 5C0 .643 418 .53 550 468 - .631 600 . 518 650 .342 568 700 .9 39 618 - .766 750 .866 .5 668 .616 800 .173 .88 .984 718 .035 .0717 850 .766 768 .669 900 000 - 0000 818 - .284 a = .205 p v , c = , 5 tantf = 5 , 4 = 5 82 degrees .. 30 CONCLUSIONS. From the study of the harmonics it is seen that the wattless or magnetizingcomponent of the exciting current is what causes the distortion of the wave, and thehigher the density at which the transformer is worked the greater the distortion .The maximum value of the exciting current depends upon the position of the harmonicsrelative to the fundamental . It was found that the magnitude of the triple harmonicin the delta secondary connection of three transformers v/as dependent upon the kindof connection made in the primaries , that is , whether star or delta . The magnitu-de of the effective value of the triple in the case of the star primary was much gre? ?ater than in the case of the delta primary because there was no path for the triplein the star primary and it had to flow in the delta secondary while in the deltaprimary connection and delta secondary there are two paths for the triple . It wasalso shown that no matt
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1912
