html{display:none} WBT 351: SEL-351 Relay Coordination Techniques | Schweitzer Engineering Laboratories

WBT 351: SEL-351 Relay Coordination Techniques


Course Information

This is a two-day course.

Course Base Fees: $470 USD

In WBT 351, learn how to apply techniques for coordinating an SEL-351 Directional Overcurrent and Reclosing Relay with upstream and downstream devices. Real-world SEL-351 applications provide you with an ideal learning environment for practicing step-by-step settings calculations.


This course is for protection engineers and technicians who want to enhance their knowledge of relay coordination techniques.


Day 1

  • Introduction to Coordination: Distribution System Faults
  • SEL-351 Protection Overview
  • Coordination Strategies

Day 2

  • Coordination Pairs: Calculating Pickup and Time Dial Settings
  • SEL-351 Coordination Application Examples

Course Objectives

At the conclusion of this course, students can:

  • Describe the basic overcurrent device coordination goals, principles, and strategies.
  • Identify common coordination pairs.
  • Describe the basic SEL-351 protection and coordination settings, including phase and ground instantaneous, phase and ground definite-time, phase and ground time-overcurrent, and reclosing settings.
  • Determine SEL-351 coordination settings using provided calculation methods and/or criteria to coordinate with upstream and downstream devices.
  • Apply coordination strategies to real-world application examples.

Student Background and Knowledge

Before you attend this class, we highly recommend that you complete CBT 351: Introduction to SEL-351 Relays.

Course Information
Course Base Fees: $470 USD*

CEUs: 0.5
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Course Preparation

Digital course materials: A link to download the digital course materials will be sent via email 2 weeks prior to the course, and a workbook will be provided on the first day.

Please ensure that your laptop does not have any installation blocks before you come to class.

Additional information is on the Course Policies page.