32 ELECTRICAL ENGINEERING PROBLEMS 



R = 0.4 and R, = 80. Plot this curve and from it the total 

 characteristic. (10 ram.) 



13. Plot the external straight-line characteristic of a 550-volt 

 (at full load), 110-kw., compound-wound, short-shunt generator, 

 over-compounded 10%. If R fl = 0.09, R/ = 0.04, R, = 100, plot 

 also the total characteristic. (10 ram.) 



14. A 450-kw., compound generator, long shunt (85 r.p.m.), 

 gives 500 volts on no load and is over-compounded 10%. R a = 

 0.018, R/ = 0.0055. The full-load shunt current is 10.5 amperes. 

 Construct the external and total characteristics. (10 ram.) 



