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

APP 351: SEL-351 Protection System


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

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.


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 acSELerator QuickSet SEL-5030 Software 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
Course Information
Course Base Fees: $USD950*

CEUs: 1.4
Available Courses

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


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Course Requirements


Before you attend this class, you must meet the following requirements:

  • Basic familiarity with protective relaying, SELogic control equations, acSELerator QuickSet SEL 5030 Software, front-panel controls, and the SEL‑4000 Relay Test System
  • Ability to operate a personal computer and set up a communications session
  • Completion of CBT 101: Introduction to SEL Relays (highly recommended)

Course Preparation

Please check the General Course Information page for what you should bring to class. In addition, please make sure that the laptop you bring to class has the following software/features:

  • acSELerator QuickSet SEL-5030 Software with the SEL-351 driver and instruction manual, installed and updated through SEL Compass
  • SEL-5401 Software
  • SEL-C662 USB Driver