SU928435A1

SU928435A1 - Arc-extinguishing device

Info

Publication number: SU928435A1
Application number: SU782695325A
Authority: SU
Inventors: Юрий Афанасьевич Шамро
Original assignee: Предприятие П/Я А-7809
Priority date: 1978-12-13
Filing date: 1978-12-13
Publication date: 1982-05-15

Description

(54) ДУГОГАСИТЕЛЬНОЕ УСТРОЙСТВО(54) DIGITAL DEVICE

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Изобретение относитс к электротехнике и может быть использовано дл гашени электрической дуги, возникающей между контактами коммутационных аппаратов.The invention relates to electrical engineering and can be used to extinguish an electric arc that occurs between the contacts of switching devices.

Известно дупогасительное устройство, в котором дл перемещени и удлинени электрической дуги в щелевом канале требуетс спещ1альна система магнитного дуть с магнитопроводом , охватывающим пакет изол ционных пластин в зоне гашени дуги 1 .A backup device is known in which to move and lengthen the electric arc in the slotted channel, a special magnetic blowing system with a magnetic core is required that encloses a package of insulating plates in the quenching zone of the arc 1.

Недостатком известного устройства вл етс то, что в наиболее важный дл гашени дуги промежуток времени - околонулевой период - дуга останавливаетс в щелевой канале .A disadvantage of the known device is that in the most important period for extinguishing an arc, a period of time close to zero, the arc stops in a slotted channel.

Наиболее близким по технической сущности к изобретению вл етс дугогасительное устройство, содержащее образующие между собой щели ,изол ц юнные пластины с вырезами со сторюны входа дуги, смещенными в смежных изол ционных пластинах в противоположны стороны от плоскости их симметрии , и электроды в виде замкнутого контура , расположенные между смежными изол ционными пластинами. В этом устройстве у начала вырезов в изол ционных пластинах установлены токопровод щне детали, служащие дл делени дуги на части и перемещени по ней дуги, а над этими детал ми установлены электроды в виде замкнутых контуров , которые служат дл дальнейшего перемещени дуги и закручивани ее в петлю (2.The closest to the technical essence of the invention is an arcing device containing interstitial gaps, insulating plates with cuts from the arc entrance side displaced in adjacent insulating plates opposite to their symmetry plane, and electrodes in the form of a closed contour, located between adjacent insulating plates. In this device, at the beginning of the cuts in the insulating plates, the conductor of the part's chimney is installed to divide the arc into parts and move the arc along it, and above these parts there are electrodes in the form of closed circuits that serve to further move the arc and twist it into a loop (2.

Недостатком этого устройства вл етс то, что в нем взаимодействие тока дуги с током в замкнутом контуре начинаетс лишь после вхождени дуги в щели, что приводит к ухудшению условий гашени дуги.The disadvantage of this device is that in it the interaction of the arc current with the current in a closed circuit begins only after the arc enters the gap, which leads to deterioration of the arc extinction conditions.

Цель изобретени - упрощение конструкции и улучшение условий гашени дуги.The purpose of the invention is to simplify the design and improve the arc extinction conditions.

Claims

The goal is achieved by the fact that in an arc-suppressing device containing insulating plates that form interstices with each other, with notches on the arc entrance side, are displaced in adjacent insulating plates in opposite directions from their plane of symmetry, and electrodes are in the form of a closed circuit, located between adjacent insulators. These electrodes are installed at the beginning of the cutouts in the insulation plates. FIG. I shows a stack of insulation plates; FIG. 2 is a sectional view of A-Ana of FIG. in fig. 3 shows a section BB in FIG. 1. The arc-clamping device contains insulating plates 1 and 2 with sides of 3 edges, assembled into a bag and forming gaps between them 4. Instead of sides 3, spacers can be installed between the plates. On the side, the arc entrance in the plates is made notches 5 and 6 displaced in adjacent plates in the opposite side from the plane of symmetry of the plate pack. Between adjacent isoli The electrode plates 1 and 2 place the electrode 7 in the form of a closed contour at the beginning of the cuts in the insulating plates. Electro 7 can be made whole or from several parts connected by welding, soldering, etc. Electrode 7 can be installed between plates 1 and 2 or in the groove of one of the plates. Arcing device operates as follows. The electric arc arising from the opening of the contacts of the switching apparatus is prestressed and blown into the channel formed by the notches 5 and 6 and the slits 4 between the insulating plates 1 and 2. When the arc moves, it contacts the electrodes 7 and divides them into segments . The reference points and 1 (j junction of short arc segments move, along the electrodes 7 to the top of the cutouts, deviate from the plane of symmetry of the plate pack to the right and left, respectively. In the slit 4 segments of the jets extend inside the arc-suppressing device in the form of loops 8. Current. From one the loop 8 of the arc to the adjacent loop flows mainly through the lower part of the electrode 7 (broken line | e). Only a small part of the current branch off to the upper part of electrode 7, since its resistance to the reference points of the arc 7 and ig is significant but greater than The lower part. Loops 8 of the arc with the lower parts of the electrodes 7 connected in series form an electric current circuit in the form of a spiral. The arc current excites its own magnetic field. The magnetic flux Φ generated by this current inside the spiral increases the size of the loops and the total arc length What is needed is dd quenching. When the current in the arc decreases and approaches zero, the magnetic flux induced by the arc circuit decreases accordingly. This change in flux causes the appearance of a current i 3 in the ring circuit of the electrode 7, which excites the second component of the magical flux F in the same direction as FD. These currents add up, and as a result, the magnetic blast in the most important period for extinguishing the arc — the near-zero period — is intensified. At the same time, the magnetic blast is also maintained at the moment of current transition through zero, therefore the arc does not stop and deionizes efficiently, moving to the unheated parts of the gap. If the current in the arc loop of the spiral arcing circuit rises (for example, the current of a half-wave of alternating current), then an increasing flow of the arc spiral excites a current in the ring circuit of the electrode 7 with a current opposite to the current in the arc loop. Therefore, the current induced in the electrode 7 pushes away the arc stem, and the possibility of its ejection beyond the allowable range of travel is also limited. Thus, using the invention allows, while simplifying the construction, to improve the conditions for quenching dzti by more fully utilizing the interaction of the arc circuit and the closed circuit of the electrode. Claims arc suppressor device containing insulating plates forming between gaps with cuts from the entrance side arcs offset in adjacent nzolation plates to opposite sides from the plane of their symmetry, and electrodes in the form of a closed contour located between adjacent insulating plates about different By the fact that, in order to simplify the construction and improve the arc extinguishing conditions, these electrodes are installed at the beginning of the cuts in the insulation plates. Sources of information taken into account in the examination 1. US Patent No. 2611058, cl. 200-144, 1968.

2. USSR author's certificate number 518813, class., H 01 H 9/30, 1974 (prototype).

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