T. DAVIES - Böcker
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4 produkter
4 produkter
812 kr
Skickas inom 7-10 vardagar
The 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.Vital aspects such as the modern cartridge fuse, types of relays, and the role of the current transformer are covered and the widely used inverse definite-minimum time overcurrent relay, the theory of the Merz-Price protection system and the development of the high-impedance relay system are critically examined. This new edition has come about in response to the dramatic change from the use of electro-magnetic relays to electronic and micro-processor relays which figure in practically all new installations. Therefore, although the theory and usage are the same, the application can be much improved owing to the increased range and accuracy and the added facilities provided with the modern relays. This book reflects the change and explains the technical advantages.
391 kr
Skickas inom 5-8 vardagar
280 kr
Skickas inom 5-8 vardagar
97 kr
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CELEBRATE THE MANAGER OF ENGLAND'S WORLD CUP FINALISTS!Is there anyone with a track record like Sarina Wiegman? Undefeated at any finals, she is the epitome of success, so shouldn't you... be more Sarina?Here are 80 scenarios in which Sarina would operate with flawless efficiency, such as:· Sarina would never wear a half-and-half scarf.· Sarina could design a VAR system that everyone was happy with.· Sarina could make cyclists and taxi drivers get along.· Sarina always believed it would take women to bring it home.Perfect for the footy fan in your life, Be More Sarina is the fun way to celebrate England's most successful football manager.