ELECTRICAL INSULATION FOR ROTATING MACHINES Design, Evaluation, Aging, Testing, and Repair by GREG C. STONE EDWARD A. BOULTER IAN CULBERT HUSSEIN DHIRANI
CONTENTS:
1 Rotating Machine Insulation Systems
2 Evaluating Insulation Materials and Systems
3 Historical Development of Insulation Materials and Systems
4 Stator Winding Insulation Systems in Current Use
5 Rotor Winding Insulation Systems
6 Core Laminations and Their Insulation
7 General Principles of Winding Failure, Repair and Rewinding
8 Stator Failure Mechanisms and Repair
9 Rotor Winding Failure Mechanisms and Repair
10 Core Lamination Insulation Failure and Repair
11 General Principles of Testing and Monitoring
12 Off-Line Rotor and Stator Winding Tests
13 In-Service Monitoring of Stator and Rotor Windings
14 Core Testing
15 Acceptance and Site Testing of New Windings
16 Maintenance Strategies
PREFACE:
This book arose out of the conviction that both designers and users of large motors and generators would appreciate a single reference work about the electrical insulation systems used in rotating machines. We also wanted to document how and why the insulation systems in current use came to be. Since rotating machine insulation is not the most glamorous field of study in the engineering world, it is sometimes treated as an afterthought. The result has been a gradual loss of knowledge as innovators in the field have retired, with few new people specializing in it. We hope that the archiving of the information in this book will slow this gradual loss of knowledge and be a useful starting point for future innovations. This book is unique in that two of the authors (Alan Boulter and Ian Culbert) have a machine design background, whereas the other two have experience as primarily users of machines. With luck, both users and manufacturers of machines can find their interests represented here. Collectively, three of us (Greg Stone, Ian Culbert, and Hussein Dhirani) want to thank Ontario Hydro (now Ontario Power Generation) for enabling us to become specialists in this field. It seems that the current business climate enables few engineers to become as specialized as we were allowed to be. We would also like to thank John Lyles, Joe Kapler, and Mo Kurtz, all former employees of Ontario Hydro, who taught us much of what we know. EPRI, and Jan Stein in particular, are acknowledged for allowing the three of us to have a “dry run” at this book when they sponsored the writing of a handbook in the 1980s.
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