Electric Motor Control
With a highly practical approach, ELECTRIC MOTOR CONTROL, 9E provides a useful and effective tool for anyone who will install, monitor, and/or maintain motor controls. The book begins by introducing the simplest of equipment and then builds upon this knowledge, step-by-step, enabling readers to learn how to draw and interpret motor control schematic diagrams. Subsequent units provide useful information on motor control components and how they are connected to form complete control circuits.
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Circuit Layout Connections and Symbols
Control Pilot Devices
Basic Control Circuits
AC Reduced Voltage Starters
ThreePhase Multispeed Controllers
Wound Rotor Slip Ring Motor Controllers
Synchronous Motor Controls
acceleration adjustable amperes applications armature automatic autotransformer auxiliary contact button is pressed connected in series contactor contacts close control circuit control relay DC motor de-energized Delmar/Cengage Learning direct current disconnect drive dynamic braking Eaton Corporation elementary diagram energized equipment float switch frequency heater horsepower induction motor input installed interlock limit switch line voltage load contacts machine manual starter mechanical module motor control motor starter movable contact normally closed contact Objectives After studying OL'S operation output overload relay phase pilot devices plugging poles position power factor pressure switch protection push button reduced voltage resistor reverse rheostat Rockwell Automation rotation Schneider Electric SCRs selector switch shaft shown in Figure shunt field single-phase solenoid solid-state Source speed control stator stop button Study Questions studying this unit symbols synchronous motor temperature terminal timer tion torque troubleshooting two-wire control variable-frequency drives volts wiring diagram wound rotor motors