html{display:none} APP 351: SEL-351 Protection System | Schweitzer Engineering Laboratories

APP 351: SEL-351 Protection System

PDHs: 15

Course Base Fees: $1,000*
* Plus Applicable Tax


Course Information

This is a two-day course.

Course Base Fees: $1,000 USD

APP 351 provides comprehensive application training for the SEL-351 Protection System, an extremely flexible protective relay used by utilities worldwide, in multiple applications. Working in groups of two, students gain hands-on experience in communicating, setting, metering, monitoring, retrieving event reports, and performing control functions by working directly with the SEL-351S Relay.


This course is designed for utility and industrial protection engineers and power system consultants.


Day 1

  • SEL-351 Relay Family Overview
  • SEL-4000 Relay Test System: SEL-AMS and SEL-5401 Software
  • Using acSELerator QuickSet SEL-5030 Software With the SEL-351S
  • Front-Panel Targets and Display
  • SELogic Control Equations (includes a hands-on exercise)
  • Relay Settings Overview
  • Overcurrent Elements
  • Best Choice Ground Directional Element
  • Voltage and Frequency Elements
  • Relay Logic and Settings

Day 2

  • SEL-351S Front-Panel Large Operator Controls (includes a hands-on exercise)
  • Hands-On Exercise: Part 1
  • Breaker Monitor
  • Retrieving, Understanding, and Analyzing Event Report Information
  • Optional:
    • Mirrored Bits Communications (includes a hands-on exercise)
    • Data Acquisition and Control Via Distributed Network Protocol (DNP)
    • SEL-351R Recloser Control
    • Hands-On Exercise: Part 2

Course Objectives

At the conclusion of this course, students can:

  • Apply the SEL-351S Relay protection, monitoring, and control features.
  • Communicate with the relay through the front panel and serial port.
  • Use QuickSet to apply relay settings, program SELogic control equations, and analyze fault records and the relay element response.
  • Analyze Sequential Events Recorder (SER) reports.
  • Implement relay-to-relay logic communications via the Mirrored Bits communications protocol.
  • Identify multiple applications for the SEL-351 Relay family.
  • Differentiate between SEL-351, SEL-351A, and SEL-351S Relay features.

Student Background and Knowledge

Before you attend this class, we recommend that you:

  • Have basic familiarity with protective relaying, SELogic control equations, QuickSet, front-panel controls, and the SEL‑4000 Relay Test System.
  • Have the ability to set up relay communications using acSELerator QuickSet SEL-5030 Software.
  • Complete CBT 101: Introduction to SEL Relays (highly recommended).

Available Courses

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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.