html{display:none} ME-PROT 407: Transmission Line Protection | Schweitzer Engineering Laboratories

ME-PROT 407: Transmission Line Protection


Engineers and power system consultants who need a comprehensive understanding of the design concepts and methods used in protecting high-voltage power transmission would benefit from this class.

PROT 407 provides an in-depth study of the methods used in designing protection for high-voltage power transmission lines.


  • Introduction to Transmission Line Faults
  • Transmission Line Protection Fundamentals
  • Traditional Transmission Line Protection Using Directional Overcurrent Elements
  • Class Exercise: Traditional Directional Relays
  • Modern Transmission Line Protection Using Directional Overcurrent Elements
  • Class Exercise: Modern Directional Relays
  • Transmission Line Protection Using Distance Relays
  • Class Exercise: Application and Coordination of Distance Protection
  • Distance Relay Polarizing
  • Transmission Line Protection Problems
  • Distance Relay Element Design
  • Directional Comparison Line Pilot Protection
  • Transmission Line Current-Only Differential Protection
  • Transient Stability and Power System Protection
  • Power Swings and Out-of-Step Protection
  • Series-Compensated Line 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:

  • Describe the protection requirements of modern power transmission lines
  • Identify the protection and fault location methods to apply in modern transmission lines
  • Identify the strengths and limitations of available tools to protect transmission lines against phase-to-phase and phase-to-ground faults
  • Define and address protection problems for high-voltage transmission lines
  • Implement modern directional and distance elements into existing protection
  • Select the best pilot protection schemes for transmission lines
  • Implement directional comparison pilot and line differential protection schemes
  • Explain the effects of reclosing (three-pole and single-pole) and breaker failure protection to preserve the stability of high-voltage transmission systems

For additional information and to register please contact:

Ali Omran    
Customer Service Supervisor    
SEL International Operations    
SEL Bahrain 
Phone: +973-1758-7077 


Course Requirements


A degree in electrical engineering or equivalent experience is required. In addition, PROT 407 requires completion of PROT 401: Protecting Power Systems for Engineers or the following:

  • Familiarity with transmission line characteristics
  • A basic knowledge of protective relay design, symmetrical components, and power system protection
  • A working knowledge of trigonometry, basic calculus, complex numbers, and phasor concepts

Course Preparation

Please check the General Course Information page, for what you should bring to class.

Course Information
Course Base Fees: $USD2,000*
Available Courses

There are currently no courses available. Request to be notified when this course is added to the schedule.



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