44 THE DESIGN OF STATIC TRANSFORMERS 



i-yi'ii a still ^riaUT thickness bring quite appropriate with 

 modern alloyed steel. 



FIG. 19. Curves showing the effect of various kinds of core insulation on the 

 nett effective iron in transformer cores for various thicknesses of stampin 



Dipping tanks and drying ovens are essential adjuncts to the 

 manufacture of transformers, and my opinion is that when all 

 these facts are considered, it is hest practice to insulate the 



