DE1066259B - - Google Patents

Description

Applicant:

LICENTIA Patent-Verwaltungs-G.m.b.H., ° Hamburg 36, Hohe Bleichen 22

Dipl.-Ing. Fritz Eiserlo, Kassel, has been named as the inventor

Shaped arcing chamber shown. Located within the extinguishing chamber 1 with an expanded space 2 the fixed switch contact 3 and the movable switch contact 4. The one between these two drawn arc releases gases from the gas-emitting walls of the arcing chamber, which are in the Room 2 are pressurized and then at high speed at the zero crossing of the arc Escape into the open via the cooler 5 through the outflow opening 6 and the re-ignition prevent the arc by entraining the ionized switching gases and metal vapors. Before this, however, these gases still have to pass through the textile fabric 7, due to its effect the formation of an explosive gas mixture is avoided.

The invention can also be used in such liquid switches where the arc A decomposition of the liquid takes place, leading to explosive gas mixtures with the oxygen Air leads.

Patent λ x claims:

1. High-voltage switch with self-generated gas or vapor extinguishing agent, in which the arc within a closed except for the outflow opening of the switching gases Extinguishing chamber is pulled and blown, in which the outflow opening through a metallic cooler is completed, characterized in that behind the metallic A textile fabric is arranged in the cooler.

909 630/246

Claims (1)

In the case of high-voltage switches that use self-generated gaseous or vaporous extinguishing agents work that is cleared from the arcing chamber walls by the cut-off arc, it can Explosive ignitions occur outside the extinguishing chamber, which is the case with multi-pole switches Cause phase flashovers and thus destruction through short-circuit arcs. These ignitions are due to the fact that explosive mixtures, in particular by combining from Urea resins or melamine resins form hydrogen released with the oxygen in the air. It It has been shown that a cooler and damper made of metal, as it is in compressed gas switches with externally generated Pressurized gas is used, cannot prevent such ignitions. The invention relates to a high-voltage switch with self-generated gas or Vaporous extinguishing agent, in which the arc is closed within one up to the switching gases The quenching chamber is pulled and blown. To the above-mentioned disadvantageous in such a switch To avoid phenomena, the outflow opening for the switching gases is next to a metallic cooler still completed according to the invention by a textile fabric arranged behind it. As such, tissue linen or cotton is particularly suitable. This fabric prevents the switching flame from leaking out from the extinguishing chamber completely and thus also suppresses that resulting from an explosion Switching noise. Without the textile fabric, there is a dark space above the wall of the extinguishing chamber a bright gas population stands at a certain distance. One can assume that at this point the exiting Hydrogen-containing gases reach a critical mixture with the oxygen in the air and then explode due to their still considerable temperature. The textile fabric causes a very fine subdivision of the exiting gas jets over a relatively large area, which immediately swirls them intensely with the air above the tissue, so that they become cannot form a critical mixture with the oxygen in the air. Also occurs at the same time a strong Subcooling of the hot switching gases. The Gevvebe is not affected by this, as one, direct contact with the arc is prevented by the metallic cooler. It is useful to protect the textile fabric from mechanical damage placed between solid layers of wire. The Jirfiudung is strength in the l ^T. I and. 2 of the drawing on a longitudinal and cross-section of a slot high-voltage switch
with self-generated extinguishing agent