More From Chris Werstiuk

The Relay Testing Handbook #7: End-to-End Testing By Chris Werstiuk
Paperback: $33.95
Prints in 3-5 business days
This package provides an overview of End-to-End testing and answers the most common questions a relay tester should ask before performing their first End-to-End test. A basic introduction of this... More > test technique is followed by a step-by-step procedure for performing a successful end-to-end test. This package also includes an overview of the most common communication-assisted protection schemes to help the reader understand how these schemes operate. Go to for more information. This paper will NOT be part of the final Relay Testing Handbook.< Less
The Relay Testing Handbook: Principles and Practice By Chris Werstiuk
Hardcover: $159.95
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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 for more information.< Less
The Relay Testing Handbook: Simplified Motor Relay Testing - Paperback By Chris Werstiuk
Paperback: $129.95
Prints in 3-5 business days
The Relay Testing Handbook: Simplified Motor Testing The Relay Testing Handbook:Principles and Practice introduced you to relay testing and gave you the theory for the most common protective relay... More > elements used in the power system along with step-by-step testing instructions. Motor relays may be the most common protective relay out in the world, but relay testers are often frustrated when they try to test them using standard relay testing techniques because you cant assign a pickup to an output to perform your tests. Motor relays require you to perform dynamic testing to get pickup and timing test results. This book will show you how to test any motor relay with any test-set through these motor topics:  Introduction to motors  Understanding motor connections and controls  How to connect your test-set  General motor testing principles< Less
The Relay Testing Handbook #8: Testing Differential Protection (87) By Chris Werstiuk
Paperback: $33.95
Prints in 3-5 business days
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 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 for more info.< Less

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