Electric Motor Control- numerous control schematics and wiring diagrams are included to help those new to the world of motor control in understanding and interpreting the function of a control circuit- different types of control circuits are introduced and illustrated, providing readers with a complete understanding of how control components operate as well as their intended uses |
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Allen-Bradley amperes applications armature automatic autotransformer button is pressed capacitor connected contactor control circuit control relay counter emf Cutler-Hammer dashpot dc motor de-energized disconnect drive dynamic braking elementary diagram equipment float switch flux frequency relay full voltage heater horsepower induction motor installed interlock limit switches line voltage load low-voltage machine magnetic starter mechanical motor accelerates motor control motor starter nameplate normally closed contact normally open contact OBJECTIVES After studying OL'S operation overload relay phase pilot devices poles position power factor pressure switches protection push button r/min reduced voltage relay coil reset resistor rheostat selector switch sequence shown in figure shunt field single-phase solenoid Square D squirrel cage motors starting current starting resistance starting torque stator stop button STUDY/DISCUSSION/TEST QUESTIONS studying this unit synchronous motor three-phase three-wire control timer tion torque troubleshooting TWO-WIRE CONTROL valve voltage starting volts wiring diagram wound rotor motors