120° ALTERNATING GENERATORS AND SYNCHRONOUS MOTORS. 
trical machines it is customary to apply the rule 
KVA'X Constant =D? * DX Ne ee ee (39) 
as a guide for the approximately correct proportioning 
of the alternator. 
t.70 
60 
8 
\ 
‘KW 
| 
| 
| 
OUTPUT CHFFYCLENT. 
S 
3 
Qe 700 200 300 400 500 600 yoo 800 900 1000 
WIPUT LV KTA. 
Fie. 64.—OutTputT COEFFICIENTS OF STANDARD POLYPHASE 
ALTERNATORS. 
Fig. 64 indicates the values of the constant or factor f for 
various sizes of generators. 
Z 
Fie. 65.—LEADING DIMENSIONS OF ALTERNATORS. 
Table 16, applied to Fig. 65, gives the leading dimensions 
