[mcnaughton] 



ELECTRIC SERIES TRANSFORMERS 



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lation of E.M.F. to Cunent in the Secondary Winding- with the Pri- 

 mary open. From this is obtained the Impedance curve by dividing 

 Volts by the corresponding Amperes. 



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These curves show the low part of the Saturation Curve on which 

 the Iron of industrial Series Transformers is usually worked and also 

 the marked increase of Inductance with Current. 



