Transcription of Electric Motor Controls - Process Control and …
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Electric Motor Controls - Process Control and …
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 Operational ControlSpeed ControlReversingJoggingSequence Control An understanding of each of these areas is necessary to effectively apply Motor controlprinciples a
3 Figure 26. Manual Starter There are two different types of common “across the line” starters including 1. Manual Motor Starters 2. Magnetic Motor Starters
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