Cargando…
Electromagnetic compatibility in underground mining : selected problems /
Theoretical and technical problems of electromagnetic compatibility <RM>(EMC)</RM> in mining are covered in this volume. EMC is discussed in three main groups of problems: sources <RM>(generation)</RM> of interference, propagation of interference in mining conditions, the inf...
| Clasificación: | Libro Electrónico |
|---|---|
| Otros Autores: | , |
| Formato: | Electrónico eBook |
| Idioma: | Inglés Polaco |
| Publicado: |
Amsterdam ; New York : Warszawa :
Elsevier ; PWN, Polish Scientific Publishers,
1993.
|
| Colección: | Advances in mining science and technology ;
7. |
| Temas: | |
| Acceso en línea: | Texto completo Texto completo |
Tabla de Contenidos:
- 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.