Insulators For High Voltages

This study of insulating materials examines such topics as the manufacture of tempered glass, the glass-fibre core, the polymeric housing, the physics of pollution flashover and contamination, remedies for flashover and the testing of insulators.

This book covers major components of a high voltage system and the different insulating materials applied in equipment, identifying measurable materials suitable for condition assessment, and also analyses insulation fault scenarios that may occur in power equipment.

High Voltage and Electrical Insulation Engineering A comprehensive graduate-level textbook on high voltage insulation engineering, updated to reflect emerging trends and techniques in the field High Voltage and Electrical Insulation Engineering presents systematic coverage of the behavior of dielectric materials. This classic textbook opens with clear explanations of fundamental terminology, electric-field classification, and field estimation techniques. Subsequent chapters describe the field dependent performance of gaseous, vacuum, liquid, and solid dielectrics under different classified field conditions, and illustrate the monitoring of electrical insulation conditions by both single and continuous online methods. Throughout the text, numerous tables, figures, diagrams, and images are provided to strengthen understanding of all material. Fully revised to incorporate the most current technological application techniques, the second edition offers an entirely new section on condition monitoring of electrical insulation. Updated chapters discuss recent developments in gas-filled power apparatus, present-day trends in the use replacement of liquid insulating materials, the latest applications of new solid dielectrics in high voltage engineering, vacuum technology and liquid insulating materials, and more. This edition features a brand-new case study exploring the estimation of clearance requirements for 25 kV electric traction. Readers will also find the new edition: Provides new coverage of advances in the field, such as the application of polymer insulators and the use of SF6 gas and its mixtures in gas-insulated systems/substations (GIS) Uses a novel approach that explores the field dependent behavior of dielectrics Explains the “weakly nonuniform field,” a unique concept introduced both conceptually and analytically in Germany A separate chapter provides the new approach to the mechanism of lightning phenomenon, which also includes the phenomenon of “Ball Lightning” The dielectric properties of vacuum and the development in the application of vacuum technology in power circuit breakers is covered in an exclusive chapter In-depth coverage of the performance of the sulphur-hexafluoride gas and its mixtures applicable to the design of Gas Insulated Systems including dry power transformers High Voltage and Electrical Insulation Engineering, Second Edition, remains the perfect textbook for graduate students, teachers, academic researchers, and utility and power industry engineers and scientists involved in the field.

The past decade has witnessed dramatic growth in the diversity and complexity of device applications where vacuum is required to support either high voltages or high electric fields. This is particularly true in thespace industry, specifically for the development of space-based pulse power systems. This book presents an overview of the technological advances that have occurred since the publication of the Editors earlier book High Voltage Vacuum Insulation: The Physical Basis. In this latest book, contributions from internationally recognized professionals and researchers in the field provide expanded treatment of the practical aspects of the subject. High Voltage Vacuum Insulation: Basic Concepts and Technological Practice provides a modern working manual for this specialized technology that is generic to a wide range of applications. The format makes the text suitable for use as a basis for special topic lecture courses at either the undergraduate or graduate level. Provides the fundamental physical concepts of the subject Focuses on practical applications Gives a historical survey of the field Includes a detailed account of system design criteria Reviews theoretical models developed to explain the pinhole phenomena Presents results of a series of experimental investigations on the subject

Insulation Co-ordination in High-Voltage Electric Power Systems deals with the methods of insulation needed in different circumstances. The book covers topics such as overvoltages and lightning surges; disruptive discharge and withstand voltages; self-restoring and non-self-restoring insulation; lightning overvoltages on transmission lines; and the attenuation and distortion of lightning surges. Also covered in the book are topics such as the switching surge designs of transmission lines, as well as the insulation coordination of high-voltage stations. The text is recommended for electrical engineering students and practitioners who would like to know more about the methods of insulation and their applications.

High-voltage electrophysical systems used for research in physics are becoming more and more common in engineering applications, as electrical insulation comprises one of the most important constituent components. This is the first monograph dealing comprehensively and on a scientific level with the insulation of such systems. In the first part of the book, the operating conditions and necessary requirements are analyzed, while the main insulation types are outlined. The second part describes the short- and long-term strengths of vacuums and gases, as well as liquid, solid, and hybrid dielectrics as functions of various influencing factors. The third and last part is devoted to the design of high-voltage insulation systems. The knowledge provided by this book will be useful to physicists designing experimental high-voltage devices as well as to electrical engineers in high-voltage technology, electrical insulation, and cable industries.

This short monograph is a sequel to the author's previous two reference books on the subject of High Voltage Vacuum Insulation, and will be of interest to all of those involved in both fundamental research and the technological development of practical high voltage devices. Its aim is to offer an improved understanding of the operational behaviour of the high voltage vacuum gap, with particular reference to the physical origin of the prebreakdown current-voltage characteristic, and the subsequent breakdown mechanism. It introduces a range of new insights into the fundamental physical processes that operate in an "open" vacuum gap, i.e. one that is not bridged by a solid insulator, and suggests a number of diagnostic techniques that could be used to investigate these processes. In particular, it highlights the important role played by the anode which, hitherto, has conventionally been seen as a relatively passive partner in the vacuum gap. A chapter has also been devoted to a discussion of the primary, particulate-based, field-induced electron emission mechanism which is widely believed to be the precursor of gap breakdown. Finally, consideration is given as to how these new insights might influence existing technological practice, and lead to new innovative approaches for improving the insulating performance of a vacuum gap. The book has drawn extensively on the material contained in the author's 1995 book "High Voltage Vacuum Insulation: Basic Concepts and Technological Practice", and has been written in a conceptual style that makes it comprehensive to a newcomer to the field.

Studies on new solutions in the field of high-voltage insulating materials are presented in this book. Most of these works concern liquid insulation, especially biodegradable ester fluids; however, in a few cases, gaseous and solid insulation are also considered. Both fundamental research as well as research related to industrial applications are described. In addition, experimental techniques aimed at possibly finding new ways of analysing the experimental data are proposed to test dielectrics.