Electromagnetic Compatibility in Underground Mining
Elsevier Science Ltd (Verlag)
978-0-444-98670-2 (ISBN)
- Titel ist leider vergriffen;
keine Neuauflage - Artikel merken
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, and 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 systems which give to the dispatcher some information about mining hazards. The book should be of interest to mining and electrical engineers.
Part 1 General principles, concepts and terms: the technological environment - environmental protection; hazards and interferences induced by the use of electric mining equipments; the electromagnetic field; electromagnetic interferences - electromagnetic compatibility; the causes, nature and propagation of industrial electromagnetic interferences; general principles of electromagnetic interference measurement. Part 2 Electromagnetic interactions due to alternating current power network: types and range of interaction; theoretical principles of calculating the electromotive force of electromagnetic induction; principles of calculating the included voltages in auxiliary cores of mining power cables; values of voltages induced in the pilot (auxiliary) cores of power cables and flexible mining cables; the influence of screens used in power cables and flexible mining cables; the influence of the operation of thyristor convertors on interference in high-voltage power networks; examples of the results of measurements of electromagnetic interference in the underground low-voltage networks and their immediate vicinity. Part 3 Sources and propagation of electromagnetic interference in eletric traction networks: preliminary remarks; rectifier stations as sources of electromagnetic interference; electric locomotives as a source of interference; transmission of interference by contact lines; the storage-battery locomotive as a source of radio noise; the electric field of a contact wire in a heading; examples of the electric interaction of a contact line; the mutual impedance of earth return circuits; the influence of rails on the mutual impedance of earth return circuits in headings; the magnetic interaction between a traction (contact) line and the earth return circuit; the magnetic interaction between a contact line and a symmetrical line. Part 4 Electromagnetic interference in mine communications networks: communication and dispatching systems in underground mines; telephone communication; radio-telephone communication; wire teletransmission lines - types of cables used and principal parameters; circuit resistance and its asymmetry, and cable circuit insulation resistance; circuit resistance; circuit insulation resistance; attenuation and capacity asymmetry of a circuit; effective attenuation of circuits; cross-talk attenuation; asymmetry of circuit capacity; psophomatric voltages and their measurement in underground telephone networks and some requirements; internal interference in telephone communicaiton - cross-talk in call signals; the influence of dispatching alarm and warning systems on the level of the interference voltage in telecommunication lines; the influence of an electric mine traciton system on hte level of interference in telephone lines; interference produced by oepration of radiotelephones; the influence of electric trction systems on the level of the interference voltage in radio-telephone loop antennas. (Part contents)
| Reihe/Serie | Advances in Mining Science & Technology S. ; v. 7 |
|---|---|
| Zusatzinfo | references, index |
| Verlagsort | Oxford |
| Sprache | englisch |
| Themenwelt | Technik ► Bergbau |
| Technik ► Nachrichtentechnik | |
| ISBN-10 | 0-444-98670-7 / 0444986707 |
| ISBN-13 | 978-0-444-98670-2 / 9780444986702 |
| Zustand | Neuware |
| Haben Sie eine Frage zum Produkt? |
aus dem Bereich
