DE1253333B - Arc extinguishing chamber with deion plates - Google Patents

Description

GERMAN # | # PATENT OFFICE

German class: 21 c - 35/06

EDITORIAL

Number: 1253 333

File number: St 22987 VIII d / 21 c

1233 333 filing date: November 23, 1964

Open date: November 2, 1967

In the case of arc extinguishing chambers, especially those with deion plates, at a high Cut-off current, metal vapors and melting points formed on the contacts and deion plates. the Metal fumes precipitate on the cold walls of the chambers and form in disadvantageous Way electrically conductive bridges. The melting points, in particular the deionized sheets, become compact ones Metal particles torn out, which then form metal beads on the walls or the cold parts The deion plates usually do not adhere well and are lying around loosely in the arc chamber. they are uncontrollable in their position and can fall between the contacts or into the switching mechanism and give rise to electrical or mechanical disturbances. This danger is particular then given when the arc extinguishing chamber is a closed chamber.

If the arc quenching chamber is open on the front side, the metal parts and arc gases are ao thrown outwards. In addition to the deficiency that the metal deposit cannot be controlled, there is also the fact that this design requires additional free space outside the arc extinguishing chamber because of the hot gases. In order to avoid this, it is known to redirect the gases with the aid of a closed end wall and to blow them off to the side. This baffle consists of insulating material, so that the gases are only cooled down over a long distance, which makes the arc extinguishing chamber very expensive.

The invention serves to remedy these deficiencies. It relates to an arc extinguishing chamber with Deionbleche and a wall arranged behind it at a distance and consists in that an electrically conductive catch plate, isolated from the deion plates, for metal vapors and melted ones Metal particles arranged at the end of the arc chamber and on the narrow sides up to The height of the contacts is pulled down, which encloses the Deionbleche at a distance.

By arranging a catch plate in the arc extinguishing chamber, not only are the Metal parts located in the arc gas are caught, rather it is caused by the deflection of the gas the catch plate and its weather management along the catch plate caused such an intimate contact, that the arc gas is cooled and deionized to such an extent on the highly thermally conductive catch plate, that it can be made to circulate within the arc extinguishing chamber without the danger arc re-ignition occurs.

Arc extinguishing chamber with deion plates

Applicant:

Stotz contact G. mb H.,
Mannheim-Käfertal, Kallstadter Str. 1

Named as inventor:

Ulrich Diekhans, Plankstadt;
Theodor Große-Kreul, Diehlheim

This design thus enables a high switching capacity with the smallest space requirement and the arrangement of arc extinguishing chambers directly next to each other.

In order to make the catch plate particularly suitable for its purpose, a material with a low Find melting point use, which advantageously has a high thermal conductivity. To enlarge the cooling surface, the catch plate can be roughened, corrugated or perforated.

An embodiment of the invention is shown in the drawing in FIGS. 1 and 2 shown.

The arc extinguishing chamber 1 is closed at the front. The contacts 2, 3 extend into the area of the deion plates 4, above which the catch plate 6 is arranged insulated from the deion plates while maintaining a gap 5. The catch plate 6 is pulled down on the narrow side 7 of the arc extinguishing chamber 1 to the level of the contacts 2, 3 . The catch plate 6 is mounted in a groove 8 of the arc extinguishing chamber 1 made of plastic or ceramic and occupies the entire inner width of the closing end wall 9 of the arc extinguishing chamber.

Of course, the exemplary embodiment does not represent the scope of the invention. The end wall 9 can thus be formed by the catch plate 6. The catch plate can also be roughened or have bores or slots, which expediently lie in the extension of the spaces between the deion plates, but it can also be designed as a sieve. A space can be provided behind the catch plate in which the metal parts entrained by the gases and thrown through the openings are deposited. The catch plate can consist of an easily weldable material into which the

709 680/303

Claims (4)

Metal parts burn in and adhere. This material can be a plastic. Patent claims: 1. Arc extinguishing chamber with deion plates and a wall arranged behind it at a distance, characterized in that an electrically conductive, from the deion plates (4) insulated catch plate (6) for metal vapors and melted metal particles on the arc extinguishing chamber (1) is arranged on the front side and on the narrow sides (7) is pulled down to the level of the contacts (2, 3) , which surrounds the DeionbIeche at a distance. 2. arc extinguishing chamber according to claim 1, characterized in that the catch plate (6) consists of a material with high thermal conductivity. 3. Arc extinguishing chamber according to claim 1, characterized in that a material with a low melting point is used as the catch plate (6). 4. arc extinguishing chamber according to claim 1 to 3, characterized in that the catch plate (6) is roughened, perforated or corrugated. Considered publications:
German patents No. 288 308, 760 936,
738, 893 826; German exploratory documents No. 1054 140,
1104019. 1 sheet of drawings 709 680/303 10.67 ® Bundesdruckerei Berlin