142 



Electric Transformers. 



No 50648 



Transformers for connecting up to Single Phase Alternating 



Current Networks. 



Alternating-Direct Current Transformers for Constant Voltage (Figure on p. 139), for connecting 

 up to 100 500 volts Alternating Current, 50 cycles per second: comprising an Alternating Cur- 

 rent Motor with Squirrel-cage Rotor*) coupled to a Direct Current Compound wound Dynamo (the 

 compound winding of which may be switched out) for 65 volts pressure, mounted on one 

 base plate. 



The speed at no-load is 1500 r. p. m., when the load is being taken up this speed drops to the values shown 

 in the table. 



A Phase Rheostat with switch is required for starting and a Shunt Regulator for regulating the 

 voltage. 



When ordering, kindly state the frequency of the A. C. network. 



The preceding, Alternating Current Motor with Slip Ring Rotor. 



A Starting Rheostat is necessary for starting the transformer, and a Shunt Regulator for regulating the 

 voltage. 



*) In places where it is forbidden to connect up motors with squirrel-cage rotors and of the HP. efficiencies up 

 to those mentioned in the table, a transformer should be selected from those listed further on, the 3-phase motors of which 

 have rotors with slip rings. 



