| 摘要 |
<p>PCT No. PCT/FR85/00105 Sec. 371 Date Dec. 31, 1985 Sec. 102(e) Date Dec. 31, 1985 PCT Filed May 3, 1985 PCT Pub. No. WO85/05218 PCT Pub. Date Nov. 21, 1985.The disclosure relates to a switching device which comprises a casing provided with an input terminal, an output terminal and, therebetween, an electric circuit including at least two separable contacts as well as a rotary screen presenting an interposable annular sector between the contacts and displaceable vis-a-vis a wall comprising an opening for the passage of at least one of the contacts. The wall delimits in the casing two volumes as well as a lamellar space enabling to provide for the rolling and cooling of the arc. The space communicates with a chamber which enables the gas expulsion with expansion to the chamber. The invention enables to obtain a simple and inexpensive way of reliably breaking the arc.</p> |
