438 



ELECTRICAL EQUIPMENT 



between angle irons, and are insulated from the windings by oil 

 ducts and cylindrical insulating tubes 



FIG. 276. 5000-Kv.A. Circular Disc-coil, Core-type, Three-phase Trans- 

 former, Facing Low-voltage Side. 



The windings of shell-type transformers consist of rectan- 

 gular shaped coils, while, for the core-type design these have a 



