html{display:none} TST 700G: Testing SEL-700G Generator Protection Relays | Schweitzer Engineering Laboratories

TST 700G: Testing SEL-700G Generator Protection Relays


TST 700G is intended for utility and plant technicians, operators, and system consultants with an interest in relay testing and commissioning.

In this hands-on course, you will test, commission, and troubleshoot SEL-700G Generator Protection Relays and define basic generator protection testing principles. In groups of two, students will work directly with an SEL-700G Generator Protection Relay to simulate operations and to test the relay’s protection settings.


In Sections 1–7, you will test the relay’s fault protection elements. You will test abnormal conditions in Sections 8–14. Finally, you will use Sections 15–16 to test the generator’s backup protection elements.

Day 1
  • Getting Started
  • Differential (87) Element Testing
  • Ground Differential (87N) Element Testing
  • Stator Ground (64G) Testing
  • Restricted Earth Fault (REF) Testing
  • Residual Overcurrent Directional (67G) Testing (Optional)
  • Loss-of-Field (40) Element Testing
Day 2
  • Negative-Sequence Current Unbalance (46) Testing
  • Thermal Overload (49T) Testing
  • Overexcitation Volts/Hertz (24C) Testing
  • Out-of-Step (78) Element Testing
  • Power Element (32) Testing
  • Over- and Undervoltage Elements (59/27) Testing (Optional)
  • Frequency Element (81) Testing
  • Voltage-Based Time-Overcurrent (51C, 51V) Testing
  • Distance Backup (21) and Loss-of-Potential Testing

Course Objectives

At the conclusion of this course, students can:

  • Test, commission, and troubleshoot SEL generator protection
  • Establish communication with an SEL generator relay using SEL software
  • Equate Relay Word bits and SELogic control equations to traditional relay element outputs and contact diagram logic
  • Interpret system one-line diagrams for common protection applications
  • Develop effective element testing procedures
  • Calculate relay test points
  • Apply current to validate element operation and time delays
  • Retrieve and analyze data recorded by SEL relays
  • Ensure relay settings are functioning correctly and protection schemes work
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:

  • Completion of CBT 101: Introduction to SEL Relays
  • OR
  • Familiarity with protective relaying, SELogic control equations, front-panel controls, and the SEL-4000 Relay Test System
  • Ability to operate a personal computer

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-700G driver and instruction manual, installed and updated through SEL Compass
  • SEL-5401 Software
  • SEL-C662 USB Driver