SU1247960A1 - Device for extinguishing electric arc - Google Patents

Abstract

The invention relates to electrical engineering and can be used in devices for extinguishing an electric arc. The aim of the invention is to increase the arc efficiency. The device contains a package of insulation plates (PI) 1.2 with cut-outs 3.4 from the input side of an electric arc, which are located in adjacent PIs on opposite sides of an axis. a-uto a-zoah. JL ± A Between the IL there are gaps and Conductive plates (TP) 6, and each PI with the same cutout location has a longitudinal insulating partition 7, which can be made integral with the PI, and the upper end of the isolation partition can be removed from base of PI on the distance equal to the area of burning of the electric arc and the spread of its flame. The electric arc, which occurs when the contacts are opened by the conductive plates 6, is divided into segments, which move along the TP, are pulled out in the form of loops, which under the action of the internal magnetic field are quickly drawn up, however, due to the insulating walls does not occur, and the products of combustion are thrown out through cuts and slots, which shortens the burning time and reduces the arc quenching efficiency, 3 hp. f-ly, 6 ill. а (Лю 4 ч1 со О5

Description

112

The invention relates to electrical engineering and can be applied in electrical switching devices, such as switches, or contactors.

The purpose of the invention is to increase the efficiency of the arc burner.

Fig. 1 shows an insulating plate with a notch shifted to the right from the axis of symmetry and with a conductive plate on it from the input side of the electric arc ;; in FIG. 2, an insulation plate with a notch offset to the left from the axis of symmetry and; on fig.Z - section aa on fig ,, 2; FIGURE 4 shows a series of (one after another) insulation plates 1 and 2; Fig. 3 is a section B-B in Fig. 4 (section of one pair of insulating plates 1 and 2 installed in a row); figure 6 - section bb In figure 4

The electric arc extinguishing device consists of a series of alternating insulating plates 1 (fig.) And 2 (fig2) with notches 3 and 4 in them on the side; electric arc inlets, smaggdens in adjacent insulating plates in opposite directions from the plane of symmetry of the device (Fig. 4). Gaps 5 (Fig. 5) are located between the installed insulating plates. On the input side of the arc between the insulating plates 1 and 2 of each pair, conductive plates 6 are located (Figs 1 and 4)

On. insulating plates 1 (fig. and 5} along the axis of their symmetry saicpaymeHbi. insulating partitions 1 .. They can be made as a separate part or as one piece with the insulating plate. The last option is more preferable

In a stack of insulated plates 1 and 2 (fig, 4), the isop and onboard partition 7 separates (isolates) two 3 and 4, from each other, the inner edges 8 and 9 of the cutouts are as close as possible to the center line of the plates parallel to the isol: the partition 7 and adjacent to it (Fig.,, 2 and 4) "As a result, the aerodynamic drag of the train in the device abruptly removes the shield: the upper edge 10 of the isolation partition is removed from the base 1 plate at a distance equal to the area of arc burning and distribution

its flame, which depends on the value of the voltage and the current to be switched off.

On the input side of the electric arc, between the insulating plates 1 and 2 of each pair, there are conductive plates 6 (FIG. 4).

The device for extinguishing an electric arc works as follows.

The electric arc that occurs when the contacts of the switching apparatus open is blown into

. E: CLEAR (lower software, 1, 2 and 4)

a part of the device with cutouts, where it is divided by conductive plates 6 into segments j that fit freely into wide cutouts,

It turns out that the arc has low aerodynamic drag. Each segment of the electric arc with its reference points (bases) moves in the cutouts along the conductive plates 6 and occupies position 12 (FIG. 6) in the form of a loop5 inside the arc quenching device. All loops of the electric arc are jointly connected by conductive

plates 6 and together with them form an arc arc contour. Under the action of an internal magnetic field and the resulting spiral current loop each arc of the electric arc is very quickly drawn upwards, and the voltage between the loops of the electric arc increases accordingly. However, they do not partially or completely overlap the meladu, since the electric arc loops are separated by insulating partitions (Fig 6). The electric arc burning products from the inside of each coil of the electric arc are efficiently ejected by heat fluxes through which the cutouts .a insulation partition 7, Horot. evacuation of hot gases from the middle part of the electric arc

50 contributes to that; that eliminating the overlap of the arc of an arc along a shorter path already traveled by the arc (resetting back) and their repeated elongation, this reduces the time of electric arc burning and increases the efficiency of extinguishing in the proposed device the overall length of the arc of an arc continuously increases

0

five

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melts when the current passes through zero

the residual arc gas column is deionized.

The proposed device improves the arc efficiency by improving the conditions for extinguishing an electric arc and reducing the time for extinguishing it.

Claims (4)

1. Device for extinguishing an electric arc, containing a package of insulating plates, in each of which cuts are made on the input side of the electric arc, located in adjacent insulating plates on different sides of their longitudinal axis, and between insulating plates there are gaps and conductive plates located on the input side of the electric arc between each Q and a pair of insulating plates, which is characterized by the fact that, in order to increase the efficiency of each of the insulating plates. Platinum with the same arrangement of leads is equipped with an insulating partition located along its longitudinal axis, 2. A device according to claim 1, characterized in that the insulating partition is made integral with the insulating plate. 3. The device according to paragraphs. 1 and 2, characterized in that the upper end of the insulating partition is removed from the base of the insulating plate by a distance equal to the burning area of the electric arc and the propagation of its flame. 4. The device according to claims 1 to 3, which is characterized by the fact that the inner edges of the cuts in the adjacent insulating plates are parallel to the insulating partition and are adjacent to it. fig .- / (Pus.3 Jf J. FIG. S