SU218981A1 - DIGITAL DEVICE - Google Patents

Description

Arcing resistors are known in particular for high voltage AC circuit breakers, comprising parallel arcing electrodes, main contacts and means for rotating the arc.

The proposed arcing device has a simpler design. Its peculiarity lies in the fact that parallel electrodes, along with the main contacts, are placed in a closed tank filled with an arc-suppressing medium. The electrodes are made in the form of a current-carrying heel, in which electrodynamic forces arise, which throw an arc when the main contacts open to the electrodes. The electrodes can also be bent in the form of concentric circles, or I) mark the shape of the coaxial cylinders, so that the outer electrode is at the same time a reservoir for the arcing medium. Electrodes can be shaped into closed-toroidal bodies, inserted one into the other. In this case, the external electrode serves as a reservoir, and the internal one directly at the current lead has an insulating gap.

FIG. 1 is a diagram of an arcing device with straight parallel electrodes in a section; on fig. 2 - the same, with electrodes made in the form of closed parallel curves; on fig. 3 - the same.

with electrodes in the form of coaxial cylinders; in fig. 4 - device with electrodes in the form of coaxial toroidal bodies.

The device contains a sealed tank 7 (insulating or metal) with current leads 2 and 5 and parallel extinguishing electrodes 4 and 5 (ohm. Fig. 1) attached to them, at which the main contact 6 is made with its actuator at some distance from the inputs.

When (the main contacts open, the arc arising between them is influenced by the magnetic lol created by the current, it is displaced by the arcing electrodes, along which it moves in the direction of increasing the current loop, actively interacting with the arcing medium filling the reservoir 7. When it moves through zero value , due to the effect, ktmvnoy de-arming of the arc gap, the arc is extinguished, and the full voltage is restored on the electrodes. The length of the parallel electrodes is chosen based on the condition of the passage and the current through the zero value when the arc moves along the electrodes.

Between the ends of the electrodes there is an insulating gap 7.

When open contacts are opened, the arcing arc, under the action of electrodynamic forces, moves along the electrodes and, before reaching their end, jumps along the beginning of the electrodes, continuing in one direction until the current will not go to zero and the arc will not go out.

A metal cavity / (see Fig. 3), having a cylindrical shape, can simultaneously serve as one of the electrodes.

The second electrode 5, also made in the form of a cylinder, is supplied from the current lead 3 through a solid lead 8, to which electrode 5 is directly attached. The second current lead is connected directly to the rivuar cut at the lead 8 to create a loop-like current loop with main contact 6, having a sealed drive. The device operates similarly to the device of FIG. one.

The metal reservoir / may be in the form of a hollow torus with a throat (see Fig. 4), in which a solid lead 8 with a current lead 3 and an insulating sealed insert 9 is fastened.

The toroidal part of the tank is simultaneously an external arc-suppressing electrode. Inside the tank / concentric is placed the second arc-supportive toroidal electrode 5, the beginning of which is attached directly to the input 3, and the end does not reach the beginning somewhat, thus forming an insulating gap 7. The main contact b is located at some distance from the input (the beginning of the electrodes ) and bridges the electrode 5 with the inner forming the outer electrode.

When the main contacts are opened, the arc moves under the action of the electrodynamic forces between the inner in-tip of the outer electrode and the inner generatrix of the electrode 5. When it reaches the end, doo, by inertia, the arc jumps through the insulating gap and moves again but until the electrodes go out.

Subject invention

Claims (4)

1. An arcing device mainly for high voltage AC switches, comprising parallel arcing electrodes, main contacts and means for rotating the arc, characterized in that, for the sake of simplicity, the parallel electrodes together with the main contacts placed in a closed tank filled with an arcing medium, and the electrodes are given the shape of a current-carrying loop, in which electrodynamic forces are generated, throwing an arc, causing the main contacts to open on the electrodes. 2. Device no. 1, characterized in that the electrodes are curved in the form of concentric circles. 3. An apparatus according to claim 1, characterized in that the electrodes have the shape of coaxial cylinders, wherein the outer electrode is simultaneously a reservoir for the arc extinguishing medium. 4. The device according to claim 1, characterized in that the arcing electrodes are made in the form of closed toroidal bodies inserted one into the other, the outer of which serves as a reservoir, and the internal electrode directly at the electrical power supply and has an isolating 1st break.