FOU< BD-COOLBD TRANSFORM] 



I'i. <>YI;I;.U.L I)IMK\MM\- i .\n:-l!i..\<T TI:AN>; 



In I i'_ f . '.'- is shown a view of a 50-cycle 



trjiii>tnrinT l'..r ",50 kva supplird to the Iiri<Jit.n 



1 -r 



al)o\c sonic % 20 000 volts it is not desirable to 



A erg. 



loy air-l.la>t ti-ansformers, as the design d' tin- insulation 

 for pressures above liO ts may \><- malf much D 



effective when the trantfonnei l I'.T >il inun. -1^1, ,n. 



as shown in Fig. 98, usually 



ill<l in rows, over a loiigitu-ir ii wliicli 



flows to tin- Iran-!'.. i-iii-rs. In Pig, '.'I ar. sli..wn niiu- 



rmera a> n at a sub-station of tin- 



