Starting currents of transformers : with special reference to transformers with silicon steel cores . Of 90 /80° 270 360 4S0 540 €30 Fig. 9. Rush of Current on Closing the Primary Circuit of Transformer closed at 0° point of the e. m. f. wave. Residual magnetism equals — 20 X if. * [8 ILLINOIS LNGIN LICKING LXPERIMLNT STATION. ^-/2 -60 90 /80 630 e70° T60 450 S40 Fig. io. Rush of Current on Closing the Primary Circuit of Transformer closed at go point of the e. m. f. wave. Residual magnetism =— 20 X K. In Fig. 11 are plotted the calculated values of current, flux andimpress
Starting currents of transformers : with special reference to transformers with silicon steel cores . Of 90 /80° 270 360 4S0 540 €30 Fig. 9. Rush of Current on Closing the Primary Circuit of Transformer closed at 0° point of the e. m. f. wave. Residual magnetism equals — 20 X if. * [8 ILLINOIS LNGIN LICKING LXPERIMLNT STATION. ^-/2 -60 90 /80 630 e70° T60 450 S40 Fig. io. Rush of Current on Closing the Primary Circuit of Transformer closed at go point of the e. m. f. wave. Residual magnetism =— 20 X K. In Fig. 11 are plotted the calculated values of current, flux andimpressed e. m. f. for the various conditions, to the same scale, inorder to compare readily the effect of the closing point and the resi-dual magnetism. Fig. 11 is a summary of Fig. 6 to 10 inclusive andTable 3. 11a corresponds to Table 3, Columns 4-7, and Fig. corresponds to Table 3, Columns 12-15, and Fig. corresponds to Table 3, Columns 16-19, and Fig. corresponds to Table 3, Columns 20-23, and Fig. 10. lie represents the condition in which the circuit is closed at the900 point of the e. m. f. wave with no residual magnetism. This is thecondition for normal closing, since the flux and current then will enterat once upon their normal path. The same result would be obtainedunder conditions of Fig. no. if the initi
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1912
