html{display:none} EPROT 401: Protecting Power Systems for Engineers | Schweitzer Engineering Laboratories

ePROT 401: Protecting Power Systems for Engineers

Single-User Training

CEUs: 3.9
PDHs: 39

Course Base Fees: $1,950 USD*
* Plus Applicable Tax


PROT 401
Course Information

ePROT 401 provides an overview of the principles and schemes for protecting power lines, transformers, buses, generators, and motors, and introduces the fundamentals of wide-area protection. The course provides basic guidelines for relay application and settings calculation. It also reviews basic power system concepts and describes instrument transformers.

This self-paced virtual course combines instruction from SEL University instructors with exercises and provides opportunities to connect with instructors when you have questions or need further guidance. eLearning licenses will expire one year from the purchase date.

The online course format has two folders of content:

  • Sections—recordings of the lecture and downloadable exercise files
  • Resources—course manual with notes, solutions to the exercises, additional links, and a link to email instructors for help


CEUs or PDHs will be available on a section basis. A link to the certificate will appear next to each section once that section is complete.


Engineers who need a comprehensive understanding of the challenges and solutions for protecting electrical power systems would benefit from this online, self-paced, eLearning course.


  • Power System Basics
  • Power System Balanced Faults
  • Class Exercise: Power System Balanced Faults
  • Symmetrical Components
  • Class Exercise: Symmetrical Components
  • Power System Unbalanced Faults
  • Class Exercise: Power System Unbalanced Faults
  • Relaying Fundamentals
  • Instrument Transformers
  • Line Overcurrent Protection
  • Class Exercise: Overcurrent Protection Coordination
  • Line Directional Overcurrent Protection
  • Class Exercise: Line Directional Overcurrent Protection
  • Line Distance Protection
  • Class Exercise: Line Distance Protection
  • Line Pilot Protection
  • Transformer Protection
  • Class Exercise: Transformer Differential Protection
  • Class Exercise: Transformer Overcurrent Protection
  • Bus and Breaker Failure Protection
  • Class Exercise: Bus Protection
  • Generator Protection
  • Class Exercise: Generator Protection
  • Motor Protection
  • Class Exercise: Motor Protection
  • Wide-Area Protection

Note: This course teaches fundamental knowledge but does not provide hands-on experience with SEL relays.

Course Objectives

At the conclusion of this course, students can:

  • Identify the challenges and solutions to power system protection problems.
  • Select the appropriate protection schemes for various applications.
  • Analyze power system faults for balanced and unbalanced conditions using symmetrical components.
  • Describe current and voltage transformers and their impact on protection scheme performance.
  • Identify, apply, and calculate settings for distribution and transmission line protection schemes, including overcurrent, directional overcurrent, distance, and pilot protection schemes.
  • Identify, apply, and calculate settings for transformer, bus, and breaker failure protection schemes.
  • Identify, apply, and calculate settings for generator and motor protection schemes.
  • Identify and apply wide-area protection schemes, such as power swing blocking, out-of-step tripping, and load shedding.

Student Background and Knowledge

A degree in electrical engineering or equivalent experience is recommended. In addition, we recommend that you have:

  • A basic knowledge of power systems.
  • A working knowledge of ac three-phase electrical circuits, trigonometry, basic calculus, complex numbers, and phasor concepts.

Recommended reading:

  • Any electric machinery book of your choosing that covers transformers, synchronous generators, and induction motors.
  • Any power system analysis book of your choosing that covers per-unit quantities, symmetrical components, and fault analysis.

Available Courses

Single-User Training

SEL University Training Question


Course Preparation

Additional information is on the Course Policies and FAQ pages.