12 
ALTERNATING GENERATORS AND SYNCHRONOUS MOTORS. 
18, means the waste of precious winding space, which 
would be taken up by unnecessary insulation material. 
The greater the space, in percentage of the whole machine 
body, occupied by the active material, the more efficient 
and economical will be the machine. 
Lae A > 
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Fie. 6.—REVOLVING FIELD TyPpE, 50 CycLE, PoLYPHASE 
ALTERNATOR OF EUROPEAN DESIGN. (See Table 3.) 
TABLE 3.—DIMENSIONS Gr REVOLVING FIELD TYPE, 50 
CYCLES, POLYPHASE ALTERNATORS. (SEE FIG. 6.) 
KVA. np, Welent A B C D K F G H J 
45 | 1,000 | 4,000 | 623”| 3937 | 178’ | 3437] 927 | 1237/18” |16” | 34” 
60 750 | 4,800/654 | 444 |172 |372 [11 |/14 |18 |18 |40 
80 750 5,400 | 68+ 444 18} 38 fed 16 194 18 40 
150 600 8.100 | 78 594 194 424 16 214 25 254 53 
} 200 500 | 11,000 | 82 594 18 44 [17° /234 |274 | 254 153 
. 275 430 | 14,900 | 99 79 || 202-1549 129 -]—~ fete 18 
350 430 | 19.100 | 99 rq 201 1544 |22 |— |— ° |37) 173 
550 375 | 28,200 | — 910° Pe Ree ae eee ee 
. 780 300 | 47,200 | — 123 — o7 —- — —_ —_ — 
2%. Dimensions of Generators. 
For general guidance, the 
accompanying Tables, 3, 3a and 4, when applied to Figs. 
6, 6a and 7 respectively, will give the overall dimensions 
of two lines of machines, one of European (Continental) 
and the other of. English-American make. 
