| Zugriffsnummer | 14461 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | The phenomenon of "flame transmission" : Progress in the explanation phenomenon |
| Autor(in); Institution |
Beyer, Michael; 3.33, Physikalische Zündvorgänge, PTB-Braunschweig
Klausmeyer, Uwe; 3.41, Druckfeste Kapselung, PTB-Braunschweig
Markus, Detlef; 3.41, Druckfeste Kapselung, PTB-Braunschweig
Wehinger, Hans; 3.4, Explosionsschutz elektrischer Betriebsmittel, PTB-Braunschweig
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| Quelle/Jahr | Ex-magazine:(2001), 27, 23 - 27 |
| ISSN | 0176-0920 |
| Freie Schlagworte | flame transmission ; explosion protection ; flameproof enclosure |
| Zusammenfassung | The confinement of operational ignition sources in a flameproof enclosure as an explosion protection measure has a long tradition and was first described by Beyling at the turn of the century. As a result of extensive scientific investigations and numerous explosion experiments with electrical equipment, the generally recognised basis for the approval of equipment are currently the Standards EN 50018 or IEC 60079-1 resprectively. The results are predominantly phenomenological. Until now, it has not been possible to consider the physical-chemical relationship due to the complexity of the problems involved. Thus the current procedure used for flame transmission tests still comprises the stages "try, observe and vary", with the objective of withstanding the number of explosion tests specified in the standard. However, flame transmission repeatedly occurs during the tests. This exposes manufactures to higher production costs arising from the need to further reduce the length or the gap of the flameproof joint. The "Explosion Protection of Electrical Equipment" sector of the Physikalisch-Technische Bundesanstalt (PTB) includes a "Flameproof Enclosure" technical laboratory. Its aim is to explain the causes and dependencies of the phenomenon of flame transmission to provide more assistance to manufactures during the design of flameproof enclosures than previously. During the basic research work, an attempt was made to determine the physical-chemical dependencies during flame transmission using mordern laser-optic methods and numerical simulation. Here, the objective is to explain the causes and mechanisms of the flame transmissions from the safety aspect. |
