eRLY 101: Introduction to SEL Relays

This complimentary eLearning course introduces essential SEL protective relay concepts and definitions of terms. It describes how SEL relays function and use logic to make protection decisions. In addition to covering the various hardware platforms and software applications, the basics of relay data capture, event analysis, and testing are also addressed.  

---

Audience

This course is intended for new users of SEL relays and those who want to become more familiar with SEL relays. 

---

Agenda

• SEL Relay Basics
• SEL Relay Functionality
• SEL Relay Identifiers
• Requirements to Interface with SEL Relays
• Relay Logic Basics
• SEL Relay Data Capture, Analysis, and Testing Basics

---

Learning Outcomes

At the conclusion of this course, you will be able to:

• Demonstrate understanding of what SEL relays do.
• Identify protection elements in SEL relays.
• Obtain useful data about SEL relays from relay identifiers.
• Recall the access levels, software, and cables necessary to use SEL relays.
• Define common SELogic terminology.
• Examine how SEL relays capture real-time and historical data for analysis and testing.

---

Student Background and Knowledge

We recommend you have a basic understanding of the power system.