296 



Table 318. 

 ENERGY LOSSES IN TRANSFORMER STEELS. 



Determined by the wattmeter method. 



Loss per cycle per cc = AB'-^-bnBv, where ^ = flux density in gausses and « = frequency in 



cycles per second, x shows the variation of hysteresis with B between 5000 and loooo gausses, 



and y the same for eddy currents. 



German. 



t English. 



t In order to make a fair comparison, the eddy current loss has been computed for a thickness of 0.0357 cm. (Gage 

 No. 2g), assuming the loss proportional to the thickness. 



Lloyd and Fisher, BuU. Bur. Standards, 5, p. 453 j 1909. 



Smithsonian Tables. 



