This course explains how solenoids, solenoid valves, contactors and motor starters operate and are used in machine and motor control applications. The operation of various solenoid valve and motor starter circuits is explained in a very detailed “step by step” manner. Emphasis is placed on the construction, testing and troubleshooting of both motor power and control circuits.

Topics include solenoid operation, solenoid valves, contactors, NEMA and IEC devices, bimetallic, magnetic, melting alloy and solid state overload relays, .Heater selection and full voltage starters. Reduced voltage starters including primary resistor, autotransformer, wye-delta, part winding and solid state are also covered. Additional topics include selector switch jogging, pushbutton jogging, plugging, speed switches and anti-plugging.