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Electrical Design - Coordinated Power System Protection

Bijan Ghayour, P.E.

Course Outline

This online course provides an introduction to the selection and coordination of the protective devices for power systems protection. The course materials are based entirely on the Technical Manual of Department of the Army: TM 5-811-14: Electrical Design - Coordinated Power System Protection.

This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.

Learning Objective

The purpose of this course is to provide an understanding to the overall objective of protective relaying system:

At the conclusion of this course, the student will have a better understanding of the:

At the conclusion of this course, the student will be able to determine the need for a protective relaying system both in regards to specific equipment areas and for the overall distribution system.

Course Content

The course includes:

The course contains specific examples, with practical emphasis on coordination of protective relays and devices to achieve the desired balance between protection and continuity of service. The course also contains a brief section on the use of computers for analyzing complex systems.

You are required to study Chapters 1 through 5 of Technical Manual TM 5-811-14 of Departments of the Army USA.

Electrical Design - Coordinated Power System Protection

Table of Contents
Chapter 1- General Requirements
Chapter 2- Electrical Power System Overcurrents
Chapter 3- Overcurrent Protective Devices
Chapter 4- Protective Device Coordination
Chapter 5- Electrical System Protection Techniques
Appendix A- References
Appendix B- Typical Protective Device Settings
Appendix C- Typical Time-Current Characteristic Curves
Appendix D- Typical Device and Equipment Ratings
Appendix E- Partial Relay Device Numbers List
Appendix F- Representative Protective Device Operating Times
Appendix G- Coordination Examples
Appendix H- Computer Software Applications

Please click on the above underlined hypertext to view, download or print the document for your study. Because of the large file size, we recommend that you first save the file to your computer by right clicking the mouse and choosing "Save Target As ...", and then open the file in Adobe Acrobat Reader.


Once you finish studying the above course content, you need to take a quiz to obtain the PDH credits.

Take a Quiz

DISCLAIMER: The materials contained in the online course are not intended as a representation or warranty on the part of or any other person/organization named herein. The materials are for general information only. They are not a substitute for competent professional advice. Application of this information to a specific project should be reviewed by a registered professional engineer. Anyone making use of the information set forth herein does so at their own risk and assumes any and all resulting liability arising therefrom.