Hard gas
Under hard gas is meant in the electrical power engineering materials for deletion of switching arcs especially in electrical in electrical systems, circuit breakers are used.
functionality
If the arc is brought into close contact with the material used as hard gas, its components are broken down by the high temperatures into volatile components such as hydrogen . Hard gas switches allow only a limited number of switch-offs under load, as the material wears out.
materials
The materials that are used as hard gas must decompose soot-free and must not create any creepage paths for the arc. Urea or Plexiglas , for example , are suitable for this, but also other materials suitable for this application, such as polyamide 66 . For the purpose of fire protection , red phosphorus is added to the material .
literature
- Albert Keil: Electrical contacts, materials and applications: Fundamentals, technologies, test methods . Eduard Vinaricky. Springer, Berlin 2002, ISBN 3-540-42431-8 , pp. 438 .
Footnotes
- ↑ Dr. Dieter Volm: Circuit Breakers - The future belongs to direct current , In: Elektroniknet.de, October 23, 2013
- ↑ http://www.patent-de.com/20071004/DE102006015306A1.html