Introduction to AC Motor Controls
On-Site Class
8-hours/CEUs
Class covers manual starters, contactors, magnetic starters, overload devices, two wire control circuits, fuse checking, troubleshooting control circuits, control components, pilot devices, parallel stop-start stations, automatic control circuits, jogging circuits, circuit protection, reversing control circuits, electrical and mechanical interlocks, and reversing with time delays.
Course Outline:
Controllers
Manual Starters, Contactors, Magnetic Starters, Thermal Overload Devices,
Magnetic Overload Devices, Solid State Overload Devices, Starter Sizes,
Arc Suppression
Basic Control Circuits
Two Wire Control Circuits, Checking Fuses, Troubleshooting Control Circuits
Control Components
Contacts, Switch Basics, Single Pole Double Throw, Double Pole Double Throw, Special DPDT, Push Buttons, Selector Switches, Indicator Lights,
Limit Switches, Proximity Switches, Optical Limit Switches, Float Switch,
Liquid Level Switch, Flow Switch, Foot Switch, Pressure Switch, Temperature Switch, Drum Switch, Reed Switch, Liquid Level Switch,
Timing Devices
Using Pilot Devices for Motor Control
Parallel Stop-Start Stations, Pilot Lights in Control Circuits, Automatic Control Circuits, Jogging Circuits
Article 430 National Electrical Code7
Terminology, Motor Name Plates, Calculating Motor Circuit Conductors,
Branch Circuit Overcurrent Protective Devices, Motor and Branch Circuit Overload Protection, Shunting Overloads During Starting, Automatic Restart,
Supervised Alarm, Installation of Controllers and Disconnects, Motor Circuit Conductors, Feeders and Feeder Taps, Motor Circuit Calculations
Circuit Protection
Low Voltage Fuses, Types and Classes of Fuses, Standard Circuit Breakers,
Magnetic Only Circuit Breakers, Solid State Circuit Breakers, Phase Monitors, Separate Control Voltage, Overcurrent Protection, Grounded Control Circuits, Ground Detection Lamps
Reversing Control Circuits
Reversing Starters, Mechanical Interlock, Pushbutton Interlock, Reversing Using a Selector Switch, Reversing with Limit Switches, Reversing with Time Delays
Motor Deceleration/Stopping
Plugging, Anti-Plugging, Dynamic Braking, Electric Brakes
Sequence Control