122 THE DESIGN OF STATIC TRANSFORMERS 



Curve- A = /7/7,0/ Tem/oerAGure ff/se /n rf/r 

 B = Jem/oewfare ffiffe <a/uer OS/own? //? 

 C ** f~in<a/ 7em/3e/~<0fare ffise /A &//. 

 FIG. 80. Curves showing temperature rise of transformers in air and in oil. 



Iii Fig. 80 are given curves showing the final tempera- 

 ture rise in air, the rise after eight hours in air and the rise 

 in oil, for a line of oil-immersed transformers comprising 



