Elektrospin

In the ever-evolving field of protective relay technology, an engineer’s personal preference and professional judgment are as important to power system protection as the physical relays used to detect and isolate abnormal conditions. Protective Relay Principles focuses on probable power system failure modes and important characteristics of the protective relays used to detect these postulated failures.

The basic operating principles of the most common types of protection relays have not changed for more than half a century. The relays measure the major attributes of power system fault signals, such as fundamental frequency component, harmonics, magnitude and phase angle of voltages and currents.

This book, with 16 chapters and five appendices, arguably may be the most comprehensive single volume on generator and motor protection on the market. "…this book presents to practicing utility engineers a wealth of information that should be included in their library. Even those not directly involved in protection should have available to them the theory and practices associated with the protection described here "…

IThe protection which is installed on an industrial power system is likely to be subjected to more difficult conditions than the protection on any other kind of power system. Starting with the many simple devices which are employed and covering the whole area of industrial power system protection, this book aims to help achieve a thorough understanding of the protection necessary.

Harmonic distortion problems include equipment overheating, motor failures, capacitor failure and inaccurate power metering. The topic of power system harmonics was covered for the first time 20 years ago and the first edition has become a standard reference work in this area.