Special Relay can be used for alternating operation of motor drives.
There are 2 products of Special-purpose.
 Ratchet Relay
            
            
                G4Q
            
            
               Ratchet Relay
            
            
                G4Q
            
        
    Unique Ratchet Mechanism Assures Positive Alternate Transfer/Switching Operation
 Stepping Relay Unit
            
            
                G9B
            
            
               Stepping Relay Unit
            
            
                G9B
            
        
    Ideal for Controlling Pumps and Production Lines with Six or Twelve Stepping Circuits