DIMENSIONS OF A THANSFO11MKR 



43 



tin- deductions which must he made on account of the space 

 occupied hy insulation when plates ol' dilleient thickness 

 employ, d are as >et forth in TahK 1. 



- ... r. i rn:i. I:Y IN-I-I. \TI..\ ,,\ T 



i: V.MMors mi. K\ I, (iM.Mi N 



IN y 



values for core plates as given in Table 4, as also 



represent lues when <xile insiilutinn and paper insula- 



.1, are plotted in the three curves of 1 i . I 1 .'. 



\Vli.-n thr eoiv plates have a thickness <>f 0,.~>0 nun, 



A ill, according to tin- CUTT in Kig. 19, only 



f the gross core length. ( 'ons .jucntly \\- sliall he 



\\.-ll si.h- in all..winu r lo :. lh. n,-t core 



length (A/i) should thus he taK.-n a^ O.:M) ,,t th. -jross* core 



length (\g). Ai. i- i-ati..n is that the thinm-r the 



core plate, t: t-rcentage which the skin 



.tie quality hrars to the total thickness of 



:<>n, for it is wrll-known that the pernirahility is 



illy louer th- h-s- tli. thickness of the core plat. . 



f material. re the costs of the laniina- 



- themse' i the outlay for the lah.m Ling their 



asseinhly, increase with decreasing thickness. e most 



.esses of laminations used in transformer manu- 

 ,111 and O,:>0 linn, the hitt- 



