{"product_id":"the-relay-testing-handbook-principles-and-practice","title":"The Relay Testing Handbook: Principles and Practice","description":"\u003cp\u003eThe Relay Testing Handbook is an indispensable resource that every relay tester should keep at their fingertips. This book was written for relay testers  rather than design engineers  so you no longer have to decipher engineering textbooks when performing relay tests. 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 hardback book includes most of the volumes in the The Relay Testing Handbook series and includes:  Electrical fundamentals including three-phase electricity  phasor diagrams  and fault types  Relay testing fundamentals including what equipment you need and how to use it  The most commonly used testing philosophies  and the most efficient and effective ones  How to translate digital logic used by relay manufacturers into familiar concepts  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  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\u003c\/p\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":44946712264757,"sku":"ByrdShop_1934348201","price":300.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/8139\/0901\/files\/9781934348208.jpg?v=1769962622","url":"https:\/\/atxbooks.com\/products\/the-relay-testing-handbook-principles-and-practice","provider":"ATX Books","version":"1.0","type":"link"}