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Electromagnetic compatibility in underground mining
Wybrane zagadnienia kompatybilności elektromagnetycznej w górnictwie. English
1 online resource (viii, 202 pages) : illustrations
Theoretical and technical problems of electromagnetic compatibility (EMC) in mining are covered in this volume. EMC is discussed in three main groups of problems: sources (generation) of interference, propagation of interference in mining conditions, the influence of interferences on mining devices, particularly electronic devices used in deep coal mines. Propagation of interference and its influence on mining communication and signalling systems as well as on control systems of mining machines are discussed. Attention is paid to the influences of interference on dispatching sytems which give to the dispatcher some information about mining hazards. The book will be of interest to mining and electrical engineers.
Front Cover; Electromagnetic Compatibility in Underground Mining: Selected Problems; Copyright Page; Preface; Table of Contents; Chapter 1. Introduction; Chapter 2. General Principles, Concepts and Terms; 2.1 The technological environment-environmental protection; 2.2 Hazards and interferences induced by the use of electric mining equipment; 2.3 The electromagnetic field; 2.4 Electromagnetic interferences-electromagnetic compatibility; 2.5 The causes, nature and propagation of industrial electromagnetic interferences; 2.6 General principles of electromagnetic interference measurement.
Chapter 3. Electromagnetic Interactions Due to Alternating Current Power Networks3.1 Types and range of interaction; 3.2 Theoretical principles of calculating the electromotive force of electromagnetic induction; 3.3 Principles of calculating the induced voltages in the auxiliary cores of mining power cables; 3.4 Values of voltages induced in the pilot (auxiliary) cores of power cables and flexible mining cables and methods of reducing them; 3.5 The influence of screens used in power cables and flexible mining cables.
3.6 The influence of the operation of thyristor converters on interference in high-voltage power networks3.7 Examples of the results of measurements of electromagnetic interference in underground low-voltage networks and their immediate vicinity; Chapter 4. Sources and Propagation of Electromagnetic Interference in Electric Traction Networks; 4.1 Preliminary remarks; 4.2 Rectifier stations as sources of electromagnetic interference; 4.3 Electric locomotives as sources of interference; 4.4 Transmission of interference by contact lines.
4.5 The storage-battery locomotive as a source of radio noise4.6 The electric field of a contact wire in a heading; 4.7 Examples of the electric interaction of a contact line; 4.8 The mutual impedance of earth return circuits; 4.9 The influence of rails on the mutual impedance; 4.10 The mutual inductance of earth return circuits in headings; 4.11 The magnetic interaction between a traction (contact) line and an earth return circuit; 4.12 The magnetic interaction between a traction line and a symmetrical line; Chapter 5. Electromagnetic Interference in Mine Communications Networks.
5.1 Communication and dispatching systems in underground mines5.2 Wire teletransmission lines-types of cables used and principal parameters; 5.3 Circuit resistance and its asymmetry, and cable circuit insulation resistance; 5.4 Attenuation and capacity asymmetry of a circuit; 5.5 Psophometric voltages and their measurement in underground telephone networks and some requirements; 5.6 Internal interference in telephone communicationcross- talk in call signals; 5.7 The influence of dispatching alarm and warning systems on the level of the interference voltage in telecommunication lines.
Florian Krasucki [and others] ; edited by Florian Krasucki ; [translated by Adam Nieoczym].
Translation of: Wybrane zagadnienia kompatybilności elektromagnetycznej w górnictwie.
Master and use copy. Digital master created according to Benchmark for Faithful Digital Reproductions of Monographs and Serials, Version 1. Digital Library Federation, December 2002. http://purl.oclc.org/DLF/benchrepro0212 MiAaHDL
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Includes bibliographical references (pages 189-193) and index.
Amsterdam ; New York : Elsevier ; Warszawa : PWN, Polish Scientific Publishers, 1993
Advances in mining science and technology ; 7