Introduction to Industrial Automation


   Specific Solenoid Actuators



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Introduction to Industrial Automation by Stamatios Manesis, George

2.3.5   Specific Solenoid Actuators

General purpose solenoid actuators were described in Section 2.1.11, where their operation prin-

ciple was explained. These actuators are able to convert electric energy into a mechanical pulling 

force able to open or close valves or similar devices. In this section, solenoid actuators of the 

same operation principle and produced force are presented, but for specific use in power circuit 

breakers. Circuit breakers for industrial use are automatic, three-phase switches that can interrupt 

load currents under fault conditions. They are equipped with a complex over-toggle mechanism, 

operating either manually (handle) or remotely (motor and gear train) for closing or opening their 

contacts. In both cases, a strong spring is compressed and stores energy that can be released during 

Magnet


Reed switches


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