Allan Greenwood – författare
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2 produkter
2 produkter
3 108 kr
Skickas inom 5-8 vardagar
The principles of the First Edition--to teach students and engineers the fundamentals of electrical transients and equip them with the skills to recognize and solve transient problems in power networks and components--also guide this Second Edition. While the text continues to stress the physical aspects of the phenomena involved in these problems, it also broadens and updates the computational treatment of transients. Necessarily, two new chapters address the subject of modeling and models for most types of equipment are discussed. The adequacy of the models, their validation and the relationship between model and the physical entity it represents are also examined. There are now chapters devoted entirely to isolation coordination and protection, reflecting the revolution that metal oxide surge arresters have caused in the power industry. Features additional and more complete illustrative material--figures, diagrams and worked examples. An entirely new chapter of case studies demonstrates modeling and computational techniques as they have been applied by engineers to specific problems.
1 627 kr
Skickas inom 3-6 vardagar
This book provides a broad perspective of vacuum switchgear drawn from the author's many years of experience in this field. Allan Greenwood describes the development of the technology from the earliest beginnings to the most recent designs now on offer by leading companies around the world.The book starts with a solid foundation in the physics of the vacuum arc, in vacuum breakdown and in the fundamentals of current interruptions in vacuum. For the user there is an exhaustive chapter on applications, which spans all devices from contactors through switches and reclosers to power circuit breakers. Maintenance is also addressed. There are four chapters on different aspects of design and another on testing, which should appeal to the designer. The chapter on manufacturing concentrates on the interrupter as its manufacture is so entirely different from that required for oil and gas-blast circuit breakers. The treatment is comprehensive so the book will be useful to users, designers and manufacturers alike, and to students who wish to become acquainted with the subject.