Pole fire
As rod fire the most is signified leakage triggered fire wooden power poles .
Pole fires are rare these days and are sometimes only discovered as smoldering fires after several days. At the time of the expansion of the first high-voltage lines around the turn of the 19th and 20th centuries, they were more common. In his work Der Weg der Elektrotechnik , Georg Siemens (1882–1977) mentions the difficulties that arose in 1895 when supplying the city of Grünberg (today Zielona Góra ) in Lower Silesia with a 10,000 volt three-phase current line caused by pole fires. The "energetic Grünberger fire brigade " trained a special fire fighting team for pole fires. These fires resulted from flashovers due to the "still imperfect insulators ".
The Liechtenstein ordinance on parallel routings and crossings of electrical lines with each other and with railroads of August 7, 1984 stipulates that underground lines when transferring high-voltage over low-voltage lines to wooden high-voltage support structures are to be designed in such a way “that pole fires in the event of damage to insulators are possible be prevented ”.
Individual evidence
- ↑ Pole fire in the Bogental . Primeo energy. August 7, 2014. Accessed January 16, 2020.
- ↑ a b Georg Siemens: The way of electrical engineering. History of Siemens. Volume 1: The time of free enterprise, 1847-1910 . 2nd, significantly revised edition. Verlag Karl Alber, Freiburg / Munich 1961, p. 221 .
- ↑ Ordinance of August 7, 1984 on parallel guides and crossings of electrical lines between themselves and with railways . In: Liechtensteinisches Landesgesetzblatt . Provincial administration, Principality of Liechtenstein. May 30, 1985. Retrieved January 16, 2020.