Electric motors

1. What frequency does the electrical distribution network in Europe have?
2. Write what revolutions a synchronous motor with three pole shoes should have?
3. By what device would you increase or decrease the revolutions of an electric motor?
4. Write why it is not necessary to bring electric current to the rotor of an asynchronous electric motor.
5. Write what conditions must be met so that conveyor belt no. 3 can be turned on.
6. Draw the wiring diagram of a contactor for controlling an asynchronous motor with two buttons from three places including signalling. In the electrical diagram describe all elements.

Final Answer:

f =  50 Hz
n =  3000 RPM

Step-by-step explanation:

f=50=50 Hz
n=f 60=50 60=3000 RPM



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