The Relay Testing Handbook: Testing Differential Protection (87) provides step-by-step procedures for testing the most common differential protection applications.
This volume is designed to help... More > you: Understand the basic characteristics of differential protection; Develop effective and efficient testing 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. Go to http://valenceonline.com for more info.< Less
This hardback book includes most of the volumes in the The Relay Testing Handbook series and includes: Electrical fundamentals; Relay testing fundamentals; How to translate digital logic used by... More > relay manufacturers into familiar concepts; and Best practices for creating and implementing test plans.
Entire chapters are dedicated to the most commonly used protective elements including: Overvoltage, undervoltage, and frequency (59/27/81); Time, instantaneous, and directional overcurrent (51/50/67); Simple and transformer differential (87) testing with three or six current channels; and Line distance (21) testing using realistic test plans to minimize setting changes.
Each protective element chapter includes: A description of operation written for a relay tester, not for a design engineer; Step-by-step test techniques that maximize your effectiveness and efficiency; Realistic examples from various relay manufacturers and models.
Go to http://valenceonline.com/ for more information.< Less
