n 



duction t tin practical tic-signing of transformers, and then -a 

 should realise that there are many matter^ of gn-at importance 

 which have not been included. '1 he briefest description of these 

 numerous v TV important subjects, such as the mechanical 

 ~ses in the windings, the insulation of extra -high -pressure 

 transform, rs, the design of terminals and hu>hin_:s, corona 

 phenonu na. tin- t-'-tinu -I' iheel steel for transformer cores, the 



!ig of transformer oil, the extra in-ulation of the end turns 

 (which arc suhjcctcd to excess pressures at the instant of 



hing in), ground shields and oilier protective devices, tin 

 <pi -tion of employing three single-phase or one three-phase 

 transformer, the use of the "delta" or "Y "-connection of 

 three-phase tran>formers, and the subject of single-coil 

 transformers (sometimes known as compel r auto-ti 



f>riii(r>. a> di>tinguisln-d from transformers with distinct 

 in-imiiry and secondary windin-js. \\ould have necessitated a 

 treati-.- far lai-.-r and more expensive than this little intro- 

 ductory volume. I have confined my discu^i.m of the sir 



ints regarding whicli a reasonable approach to 

 definite di^i.u f nin_r methods is practicable, and 1 believe t 



liave siippli. -d a link which has not uy rate in a 



form which has m< t the needs of ^ludmts, uho, althou-h | 

 understand the underlying tl: I loSfl ho\ v t 



\\hen culled upon to work out an actual design. \Vitli a 

 to facilitating th- further study of the static transform. T. I am 

 this introductory chapter \sith a brief bibliography 

 ofsoin.' u-efiil papers n the subject, and I am of ..pinion that 



r completing his study of th- itiae, th.- r- 



will be in a position to consult with advantage the |>;, 

 th.-n-in mention 



^, ,.,,... I ' 

 PROPERTY 



