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

ePROT 401: Protecting Power Systems for Engineers

Single-User Training

CEUs: 5.1
PDHs: 51

Course Base Fees: $2,550 USD*
* Plus Applicable Tax


Course Information

ePROT 401 provides an overview of the principles and schemes for protecting power lines, transformers, buses, generators, and motors. 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.

CEUs or PDHs will be available on a chapter basis. A link to the certificate will appear next to each chapter once it 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 and Balanced Faults (with exercise)
  • Symmetrical Components (with exercise)
  • Power System Unbalanced Faults (with exercise)
  • Relaying Fundamentals
  • Instrument Transformers
  • Line Overcurrent Protection (with exercise)
  • Line Directional Overcurrent Protection (with exercise)
  • Line Distance Protection (with exercise)
  • Line Pilot Protection
  • Transformer Protection (with exercise)
  • Bus and Breaker Failure Protection (with exercise)
  • Generator Protection (with exercise)
  • Motor Protection (with exercise)

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 and apply power swing blocking and out-of-step tripping 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.

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.