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Record Nr. |
UNINA9910153758103321 |
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Autore |
Netzwerk Transkulturelle Verflechtungen |
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Titolo |
Transkulturelle verflechtungen : mediävistische perspektiven / / kollaboratov verfasst von Netzwerk Transkulturelle Verflechtungen ; Georg Christ [and eight others] |
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Pubbl/distr/stampa |
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Universitätsverlag Göttingen, 2016 |
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Göttingen : , : Universitätsverlag Göttingen, , 2016 |
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©2016 |
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Descrizione fisica |
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1 online resource (397 pages) : illustrations (some colour); digital file(s) |
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Collana |
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Open Access e-Books |
Knowledge Unlatched |
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Disciplina |
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Soggetti |
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Middle Ages - Historiography |
Middle Ages - Sources |
Culture |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Nota di bibliografia |
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Includes bibliographical references (pages [311]-359) and index. |
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Sommario/riassunto |
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Having elicited much attention in the humanities in recent years, transcultural phenomena will, in all probability, remain a topic of debate in the near future. Being the product of a collaborative act of writing involving nine authors with different specializations, this study is an introduction to the study of phenomena of transcultural entanglement as well as an effort at systematically exploring this field of research from different medievalist perspectives. |
Transkulturelle Phänomene haben in den letzten Jahren zunehmend die Aufmerksamkeit der Forschung auf sich gezogen und werden aller Voraussicht nach auch in den nächsten Jahren Gegenstand geisteswissenschaftlicher Debatten sein. Als Ergebnis eines kollaborativen Schreibaktes versteht sich der vorliegende Band sowohl als Einführung in die Untersuchung transkultureller Verflechtungsphänomene wie auch als Versuch einer systematischen Durchdringung dieses Forschungsfeldes aus unterschiedlichen mediävistischen Perspektiven. Er befasst sich zunächst auf |
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theoretischer Ebene mit der Entwicklung und den Entstehungshintergründen des transkulturellen Paradigmas. In zahlreichen Quellenstudien erörtert er ferner, wie transkulturelle Verflechtungsprozesse in mittelalterlichen Quellen unterschiedlicher Herkunft und Art benannt, beschrieben und bewertet werden. Auf dieser Grundlage wird der Versuch unternommen, unter Nutzung der Begriffe 'Netzwerk', 'Gewebe', 'rhizomatisches Geflecht' und 'Fusion' verschiedene Modelle transkultureller Verflechtung zu definieren und anhand der Quellen auszuarbeiten. Ergänzend erfolgt eine ebenfalls quellengestützte Beschäftigung mit den reziproken Beziehungen zwischen Verflechtungs- und Entflechtungsprozessen. Sie mündet in abschliessende Überlegungen zu der Frage, welchen methodischen Chancen und Risiken sich eine historisch arbeitende Forschung ausgesetzt sieht, die das transkulturelle Paradigma für die konkrete Arbeit an den Quellen nutzen möchte. Indem der Band die Genese aktueller methodischer Diskussionen nachzeichnet und diese anhand von mehr als fünfzig kurzen Quellenanalysen konkretisiert, eignet er sich in idealer Weise für den Einsatz in Studium und Lehre. Darüber hinaus bietet er durch die systematische Darstellung sowie die Reflexionen zu Theorie und praktischer Anwendung des transkulturellen Ansatzes zahlreiche Anregungen für die weitere Forschungsdiskussion. |
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2. |
Record Nr. |
UNINA9911007294903321 |
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Autore |
Bierals Gregory P. <1946-> |
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Titolo |
Overcurrent protection : NEC Article 240 and beyond / / Gregory P. Bierals |
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Pubbl/distr/stampa |
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[Place of publication not identified] : , : River Publishers, , 2021 |
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ISBN |
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1-00-320729-4 |
1-5231-4448-3 |
1-000-52149-4 |
87-7022-620-2 |
1-003-20729-4 |
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Edizione |
[First edition.] |
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Descrizione fisica |
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1 online resource (110 pages) |
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Disciplina |
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Soggetti |
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Electric power distribution |
Electric currents - Grounding |
Electric wiring - Safety measures |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Nota di contenuto |
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Cover -- Half Title -- Title Page -- Copyright Page -- Table of Contents -- Preface -- Chapter 1: Definitions -- Chapter 2: Conductor Insulation Withstand Ratings, Terminal Withstand Ratings, Conductor Fusing Currents, and Overcurrent Protection Over 1000 Volts -- Chapter 3: Motor Circuits -- Adjustable-Speed Drive Systems -- Chapter 4: Selective Coordination -- Circuit Breakers -- Chapter 5: A Comprehensive Analysis of a 3-Phase, 4-Wire Distribution System -- Overcurrent Protection - Questions -- Answer key -- Index -- About the Author. |
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Sommario/riassunto |
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An overcurrent is caused by a short-circuit, ground-fault, or an overload. A short-circuit may be hundreds or even thousands of times above the normal operating current. This type of fault may be an arcing fault between ungrounded conductors or between an ungrounded conductor and a grounded (usually, a neutral) conductor, a line-to-line arcing fault may produce a current of 74% of a 3-phase bolted fault. A line-to-neutral arcing fault will be somewhat less. A line-to-line bolted |
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fault, the equivalent, of the conductors bolted together, may be up to 100% of the available short-circuit current. A line-to-neutral bolted fault may be in excess of 100% of the 3-phase bolted fault at the source, but considerably less downstream. A ground-fault, that is, the equivalent of a connection between an ungrounded conductor and the equipment grounding system, will produce a current that may be 38% or higher of the 3-phase bolted fault current. These types of faults are typically arcing faults which normally are intermittent in nature. That is, they strike and restrike over time and may produce a short-circuit fault due to insulation damage. Once again, a line-to-equipment ground fault near the source may produce a fault current of over 100% of the 3-phase bolted fault, but considerably less downstream. An overload typically ranges from one to six times the normal current, and are normally caused by motor starting currents or transformer magnetizing currents. These conditions are of such short duration that the circuit components are not damaged. This book has a detailed analysis of these types of faults, along with explanations and examples of the various types of overcurrent protective devices to assure proper protection. This volume has extensive information on the application of overcurrent protection for conductors and equipment. The reader will be able to calculate fault currents as well as establishing the short-circuit withstand rating of conductor insulation and to determine the appropriate type of overcurrent devices based on circuit conditions. In addition, determining ground-fault currents for the purpose of selecting the proper size of equipment grounding conductors to establish an effective ground-fault current path is discussed in detail. Readership - Anyone involved with the design of overcurrent protection for electrical distribution systems from the system source to the electrical utilization equipment. The emphasis is placed on the design of the overcurrent protection for specific installations to assure proper protection for the circuit components regardless of the type of fault encountered. |
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