Three-phase asynchronous motor – Read motor nameplate

3-phase-induction motor plate - the most important informations (according to IEC 60034)

General information

Motor plate 3 phase induction motor

1.   Shaft power P in kW with a nominal load
2.   Power factor cos φ
3.  IP- International Protection , also called Ingress Protection, classifies and rates the degree of protection of casings and enclosures.  and water by   The IP code is indicated by 2 numbers: First number: Degree of protection provided against intrusion, second number: Protection against water.
4. Nominal rotational speed
5. Rated voltage and electrical connection. Here, the motor may be connected to delta at 400 V mains voltage.
6. Phase current at nominal speed
7. Rated frequency
8. Insulation class - specifies the thermal resistance of the motor winding.

Exercises

Which statement about the specifications on the motor plate is correct?

 The motor rating plate indicates the mechanical output power, the torque and the phase current.

 The motor nameplate indicates the rated electric power, the rated voltage and rated rpm.

 The motor nameplate indicates the mechanical output power, the rated voltage and current in the line.

 The motor nameplate indicates the rated electric power, the rated voltage and rated torque.

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Work order: Calculate the necessary electrical power, the torque and the efficiency at nominal range from the specifications of the motor plate shown above!

IEC = International Electrotechnical Commission