Transcription of Electric Motor Controls - Process Control and Instrumentation
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Electric Motor Controls - Process Control and Instrumentation
1 Electric Motor CONTROLSOnce the proper Motor is selected, understanding the many various Control devices available andtheir uses and limitations becomes an important part related to reliable operation and protection ofthe Motor and the personnel using the Control TopicsThere are four major Motor Control topics or categories to consider. Each of these has severalsubcategories and sometimes the subcategories overlap to some extent. Certain pieces of motorcontrol equipment can accomplish multiple functions from each of the topics or four categories include:1) Starting the MotorDisconnecting MeansAcross the Line StartingReduced Voltage Starting2) Motor ProtectionOvercurrent ProtectionOverload ProtectionOther protection (voltage, phase, etc)Environment3) Stopping the MotorCoastingElectrical BrakingMechanical Braking4) Motor Operati
4 Figure 27. Magnetic Starter of contacts that energize and de-energize the circuit to the motor along with additional motor overload protection equipment.
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