RELAYS AND RELATED MECHANISMS 



T' 



XI 



(a) 



L 1 1- 



X H 



Y 



Z 



(b) 



Figure 34.26 High-speed relay scale-of-two: {a) circuit; 

 (b) contact sequence diagram 



L 

 A 

 B 



(b) 

 Figure 34.27 Ring-of-three : (a) circuit; (b) contact sequence diagram 



530 



