The Relay Testing Handbook #8D: Testing Differential Protection (87)
Valence Electrical Training Services LLC, Nov 8, 2012 - Technology & Engineering - 160 pages
As modern protective relays become increasingly more powerful and complex, many relay testers continue to use test procedures and philosophies that are based on previous generations of relays and their limitations. Modern relays have very different characteristics that require a different testing philosophy to ensure that they will operate when required.
This volume is designed to help you:
Understand the basic characteristics of differential protection
Review the application and ensure that it has been applied correctly
Develop effective and efficient three- and six-phase test procedures that minimize setting changes
The following topics are described with realistic, practical examples and detailed instructions:
Understanding simple differential protection for motors and generators
Defining minimum pickup and slope
Determining which settings are most important
Understanding transformer differential protection
Determining correct phase shifts through transformers
Recommended steps to correctly calculate and test differential protection using six channels
Recommended steps to correctly calculate and test differential protection using three channels
Testing harmonic restraint
Tips and tricks to overcome common obstacles
This book is included in the hardcover book The Relay Testing Handbook: Principles and Practice, or it can be ordered by itself as a soft-cover book, Adobe Acrobat PDF digital download, or both.
Paperback: 160 pages
Trim Size: 8.5"x11"
Publisher: Valence Electrical Training Services LLC