TST 101: SEL Relay Testing Basics

Course Length: 2 Days (PDHs: 15)
Course Based Fees: $1,000*
* Plus Applicable Tax


TST 101 provides a beginner-level introduction to testing SEL relays. Students will learn basic relay testing skills; acquire skills required to work with SEL relays, such as using Relay Word bits and relay event reports; and practice acquired skills by working with a phase and ground distance (SEL-311C) relay during the training.


This course is intended for relay technicians or protection engineers and system consultants with an interest in relay testing.


Day 1

  • Introduction to Relay Testing
  • Introduction to SELogic Control Equations
  • Introduction to Symmetrical Components
  • Using acSELerator QuickSet SEL-5030 Software With the SEL-311C
  • Testing Aids and Tools
  • SEL-311C Transmission Protection System Overview 
  • SEL-5401 Relay Test System Software
  • Introduction to Overcurrent Relay Testing (includes a hands-on exercise)

Day 2

  • Negative-Sequence Impedance Directional Element Testing (includes a hands-on exercise)
  • Distance Relay Testing (includes a hands-on exercise)
  • Interpreting Event Report Data
  • Reference: Creating Multistate Tests
  • Appendix: Basic Relay Communications

Learning Outcomes

At the conclusion of this course, students can:

  • Establish a serial communications link with an SEL relay using SEL software.
  • Enter settings into an SEL relay.
  • Equate Relay Word bits and SELogic control equations to traditional relay element outputs and discrete contact logic.
  • Test, commission, and troubleshoot using metering, sequential events recording, and event reporting features of SEL relays.
  • Analyze information recorded by the relay using SEL software.
  • Calculate relay test points to verify responses.
  • Find information in the SEL relay instruction manuals.

Course Preparation

Install or update the following software/files on the laptop you are bringing to class:

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

Additional information is on the Course Policies and FAQ pages.

Available Courses

Request onsite training for your company.