Valence Electrical Training Services

Introduction to Protective Relays Lesson is complete

The first lesson of the upcoming How to Test Basic Overcurrent Relays Online Seminar has been recorded, edited, and added to our upcoming How to Test Basic Overcurrent Relays (Introduction to Protective Relays) Online Seminar.

The Introduction to Protective Relays lesson includes more than two hours of training videos including the following topics:

  • History of Electrical Protection
  • What Are Relays For?
  • Introduction to Relay Inputs
  • Introduction to Current Transformer (CT) Theory
  • Introduction to Current Transformer Saturation
  • Current Transformer Nameplate and Specifications
  • Current Transformer Nameplate Burden and Saturation Voltage
  • IEC vs NEMA CT Nameplate Information
  • How Relays Protect Equipment
  • How Relays Ignore System Fluctuations
  • How Overcurrent Relays Coordinate
  • Introduction to Zones of Protection
  • Relay Output Basics

We are currently working on the next lesson about electro-mechanical overcurrent relay testing. What do you want to learn about this subject, or what do you think everyone should know about electro-mechanical relays? Write your suggestions in the comments below.

About the Author Chris Werstiuk

Chris is an Electrical Engineering Technologist, a Journeyman Power System Electrician, and a Professional Engineer. He is also the Author of The Relay Testing Handbook series and founder of Valence Electrical Training Services. You can find out more about Chris here.

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