432 



ELECTRICAL EQUIPMENT 



tation of moisture from the enclosed air, which would take place, 

 due to unequal pressure and the resulting condensation, if adequate 

 facilities for breathing were not arranged. The chloride-filled 

 breather is generally considered the best type, its location being 

 shown in Fig. 276. 



The tanks may also be completely filled with oil and provided 



FIG. 271. 8000-Kv.A., 44,000-6600-Volt Radiator Type, Outdoor Trans- 

 former. 



with expansion tanks, thus giving the extreme protection against 

 moisture or the collection of explosive gases. 



Most tanks are suitable for indoor or outdoor service if proper 

 cover and bushing equipment is provided. 



In order to facilitate moving it may sometimes be advisable to 

 equip the transformers with wheels or trucks. If wheels alone are 



