Devices and Circuits - Motor Direct-On-Line (DOL) Starter

Learn in depth about the most common motor starter solution with in depth explanations of the circuit diagram and circuit components.
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 What's included?


this is a course series I started to help various colleagues in the world of electrical engineering and industrial automation to understand and to be able to design and implement a most common motor starter for industrial automation applications - DOL motor starter.

Since this is a first course in the series, I start of not only by building a whole circuit diagram but also explaining in detail all the circuit components, both for power and control circuit.

You'll also learn how to properly dimension (size) all the power circuit components. In the following courses we will more concentrate on the control circuit since after this course you will understand:

  • the symbols (IEC/NFPA)
  • the power circuit components such as fuse, contactor, motor overload switch aka motor protection circuit breaker (MPCB)
  • the control circuit components such as START/STOP pushbuttons, emergency stop pushbutton, signal lamps (aka pilot lights), relay and it's role etc.

Regarding manual controls, that is, pilot devices, I will also publish soon 2 courses (one for Siemens devices and one for Allen Bradley) that will teach you how to efficiently plan those pilot devices such as START/STOP push buttons, emergency stop push button, selector switch (MAN-O-AUTO), twin push button, pilot lights (signal lamps).

So please refer to those respective courses if you want to learn in detail how to configure those devices which tend to get complicated since they normally constitute from many different parts/pieces which if properly configured then form a whole working component.

 Course Content

  • Power circuit
  • Control circuit
  • Signal circuit
  • Overload relay, fuse monitoring solution
  • Contactor VS Relay (with examples)
  • NFPA style symbols in this circuit diagram
  • Certificate of Completion
1 section • 6 lectures • 1h 0m total length

 Who Is This Course For

  • Electrical designer
  • Panel builder
  • Panel wireman
  • Electrical Engineering / Industrial Automation graduates
  • Students of electrical engineering / industrial automation
  • Maintenance
  • System integrator


  • Basic knowledge of electrical engineering
  • Basic understanding of electrical symbols
  • Working knowledge of some drafting software - to replicate what I do in the lectures

Ivan Vidovic

Graduated electrical engineer with more than 9 years of experience in the professional design of various industrial electrical and automation systems.
About Ivan
Ivan is a graduated electrical engineer with 10 years of professional experience in the electrical design of various industrial automation systems. On the one hand in the automotive industry (Daimler, VW etc.), on the other hand process industry (TEVA, Coca-Cola, Lactalis etc.). Professional experience from different industries, for example Oil & Energy, Food & Beverages, dairy factories, chemical industry, Automotive( car body manufacturing - Karosserierohbau and industrial paint shops - Lackieranlagen).
International working experience (Germany, Norway, Sweden, Russia, China) I have been working in EPLAN since 2010, since version 1.9.
Eplan Electric P8 Advanced User Certificate.