EP1313117B1 - Dispositif d'extinction d'arc pour un interrupteur électronique - Google Patents

Dispositif d'extinction d'arc pour un interrupteur électronique Download PDF

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Publication number
EP1313117B1
EP1313117B1 EP02024168.3A EP02024168A EP1313117B1 EP 1313117 B1 EP1313117 B1 EP 1313117B1 EP 02024168 A EP02024168 A EP 02024168A EP 1313117 B1 EP1313117 B1 EP 1313117B1
Authority
EP
European Patent Office
Prior art keywords
arc
plate
arrangement according
quenching
quenching arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02024168.3A
Other languages
German (de)
English (en)
Other versions
EP1313117A3 (fr
EP1313117A2 (fr
Inventor
Klaus Dipl.-Ing. Kling
Richard Dipl.-Ing. Kommert
Alexander Rab
Jürgen Dipl.-Ing. Hofmann
Patrick Claeys
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB AG Germany
Original Assignee
ABB AG Germany
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE10242310A external-priority patent/DE10242310A1/de
Application filed by ABB AG Germany filed Critical ABB AG Germany
Publication of EP1313117A2 publication Critical patent/EP1313117A2/fr
Publication of EP1313117A3 publication Critical patent/EP1313117A3/fr
Application granted granted Critical
Publication of EP1313117B1 publication Critical patent/EP1313117B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/302—Means for extinguishing or preventing arc between current-carrying parts wherein arc-extinguishing gas is evolved from stationary parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/025—Constructional details of housings or casings not concerning the mounting or assembly of the different internal parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate

Definitions

  • the invention relates to an arc extinguishing arrangement for an electrical switching device according to the preamble of claim 1.
  • An electrical switching device comprises a Isolierstoffgeophuse, which is composed of a lower and a top in a plane parallel to its broad sides, and input and output terminals, between which there is a current path with at least one contact point, in the event of an overcurrent or a short-circuit current must be opened.
  • a in the contact point which may have either a fixed and a movable contact piece or two spaced-apart fixed contact pieces and a contact bridge with movable contact pieces, resulting arc in a Ausschalte für is supplied to an arc splitter stack in which the arc is deleted.
  • a contact point wherein the movable contact piece is arranged on a contact lever;
  • motor protection switches are two fixed contact pieces, which are bridged by means of a contact bridge.
  • the arc splitter stack has a plurality of arc quenching plates, which are held by means of an insulating paper at a distance from each other; Due to the individual arc quenching plates, the arc is transformed into small individual arcs divided, whereby an increased arc voltage is generated, which counteracts the mains voltage and provides for a current limit. The higher the number of sheets, the greater the arc voltage can be.
  • the coating material is a gaseous material
  • the gas pressure inside the splitter stack can be increased, which also increases the arc voltage, because there is a gas atmosphere between the coated arc quench plates, which can serve to increase the arc voltage present there.
  • the FR 2 584 230 shows an arc extinguishing arrangement without arc guide rails, in which the arc is formed directly in the area within the quenching plates.
  • the EP 0 051 756 shows an arc extinguishing arrangement in which a splitter stack is surrounded by a sheath, and in which the lateral legs of the enclosure may be formed as a plate, the Einlistergstellen Schl, however, is closed to the contact point
  • the FR 2 348 559 A shows an arc extinguishing arrangement with an arc splitter, which is covered with an insulating layer, wherein the occupancy can also be effected by a plate.
  • the DE 32 47 681 A1 shows an arc extinguishing arrangement in which the splitter stack with insulating material may be wholly or partially coated.
  • the US Pat. No. 3,706,868 shows an arc extinguishing arrangement without guide rails, and with quenching plates and an insulating plate whose openings are not open to the contact point.
  • the object of the invention is to further improve the arc extinguishing arrangement of the type mentioned.
  • the conditions within the arc splitter stack can be better controlled or the individual parameters can be tuned to one another more favorably.
  • an optimized gas pressure can be generated within the arc splitter stack, so that the arc voltage between the quenching plates is increased, but without the arc is passed through too high gas pressure back to the contact point.
  • the stable burning of the arc within the arc splitter stack is better controllable, the arc voltage is increased, thereby limiting the prospective short-circuit current better and safer.
  • the outgassing is optimal for purposes of arc extinguishing.
  • the inlet locating area may have rectilinear boundary edges; but he could also expand V-shaped to the contact point.
  • the extended region of the inner recess may have an approximately rectangular or possibly also an approximately circular inner contour.
  • the inner recess has a keyhole shape.
  • the at least one plate is mounted so that it limits the arc splitter stack on one side.
  • a further embodiment of the invention provides that the at least one plate of insulating material is completely or partially formed on the inside of at least a portion of the insulating material of the electrical switching device.
  • the assembly offers the advantage that a standard arc splitter stack can be used, which is inserted into the housing so that the integrally formed on the inside of the housing plate, the arc splitter stack bounded on one side.
  • the arc splitter package itself need not be changed, because the plate of insulating material is formed as part of the housing on the inside.
  • a particularly advantageous embodiment of this inventive attachment of the plate provides that the plate is divided along a parallel to their longitudinal sides and extending therebetween dividing axis in two halves, wherein each half is formed on the inside of one of the two Isolierstoffgeophusemaschine.
  • the two plate parts When joining the Isolierstoffgeophuses from the upper and lower part, the two plate parts then join together along the pitch axis seamlessly to the complete plate.
  • the two plate parts fit together in particular so that from the juxtaposition of their outer contours, the inner contour of the inner recess is formed in the plate.
  • the particular advantage of the invention is then that the switching capacity is improved and increased or the turn-off is stabilized;
  • the air and creepage distances can be increased in an arrangement with an arc extinguishing chamber between the contact pieces serving as a guide rail extension.
  • the invention can be used in all switching devices in which a resulting in a switching operation arc is extinguished with a quenching device or used to stabilize the arc at a certain point.
  • the Fig. 1 shows a circuit breaker 10, in which the invention is applied by way of example.
  • a switching mechanism 11 shown only schematically, which is coupled on the one hand with a switch knob 12 and on the other hand with a movable contact lever 13 to which a movable contact piece 14 is attached.
  • the circuit breaker 10 further comprises an electromagnetic release 15 whose armature 16 spends the contact lever 13 in the open position in the event of a short circuit.
  • the plunger 16 is connected to the switching mechanism 11, via a lever 17, so that after opening the contact lever 13, the switching mechanism 11 keeps the contact lever permanently open.
  • a bimetallic strip 18 which serves as a thermal release and the via a slide 19 acts on the switch lock, so that in this way the contact lever 13 is opened permanently.
  • the movable contact piece 14 cooperates with a fixed contact piece 20 and at a Ausschalemaschine, so with a movement of the contact lever 13 in a clockwise direction, formed between the movable contact piece 14 and the fixed contact piece 20, an arc 21, the Lichtbogenleitbleche .schienen 22 and a Horn 23 is supplied to an arc splitter stack 24.
  • the arc guide rail 22 is associated with the movable contact piece 14, the arc horn 23 the fixed contact piece.
  • the arc splitter stack 24 is in the FIGS. 2 to 4 shown in more detail. It has a plurality of arc quenching plates 25, according to the embodiment Fig. 3 a total of 11, which, like out Fig. 2 can be seen, having a substantially rectangular shape, wherein at the contact point 14, 20 assigning narrow side edge 26, an approximately V-shaped cutout 27 is provided, the parallel edges 28 and 29, which open into the narrow side edge 26, and v-shaped has facing edges 30 and 31. The tip of the V-shape of the cutout 27 has a nose 32 which faces away from the contact point.
  • the arc splitter stack 24 is covered by an insulating paper 33.
  • each arc quenching plate has a recess 36, 37 which is slightly larger than the thickness of the insulating paper 33 and lugs 38 and 39 which engage in corresponding openings 40 on the insulating paper 33 and so for fixing the Arc quenching plates 25 serve.
  • a plate 41 is made of insulating material, the peripheral contour 42 corresponds to the peripheral contour of the quenching plates 25; it has an internal recess 44 having an inlet locating area 45 and an enlarged area 46, the inlet locating area 45 opens V-shaped to the contact point.
  • the V-shape of the V-shape of the recess 27 is adapted.
  • the plate 41 is made of a gassing plastic, namely Ultramid (A3 Sk) or PA (6-6).
  • the Fig. 5 shows a plate 50 having a rectangular outer contour 51 with two parallel longitudinal sides 52 and 53 and transversely extending narrow side edges 54 and 55 and an inner recess 56th
  • the inner recess 56 has an inlet locating portion 57 open to the contact point 14, 20 and an enlarged portion 58.
  • the inlet frame portion 57 has parallel inner edges parallel to the longitudinal edges 52 and 53; the inner contour of the extended area 58 is rectangular.
  • the Einlä ingstellen Scheme 56 and the extended portion 58 includes, it should be indicated by the closed thin lines that these areas may have other shapes.
  • the Fig. 4 shows a shape; the two edges of the terminal area 57 can likewise extend in a straight V-shape, and the inner contour of the widened area 58 could also have a circular arc shape approximately.
  • the Fig. 6 shows a sectional view along the section line VI-VI of Fig. 5 , with two adjacent arc quenching plates 25 '25 ", between which the plate 50 is disposed, through the widened region 58 the arc 21 burns and acts on the material of the plate 50, causing it to outgas and change the atmosphere in the arc quenching chamber or a change in the gas pressure generated.
  • the Fig. 9 shows a perspective view of the inside of a portion of the insulating housing 10a.
  • the receiving means for the various components of the service switching device which have already been described above, provided in the form of recesses and bulges of different geometries.
  • the receiving space 100 for the splitter stack It is a substantially rectangular recess in the inside of the housing part.
  • protruding ribs 106 are integrally formed from the inside, wherein the spaces between the ribs of the thickness of the quenching plates of the splitter stack correspond, so that when inserting a splitter stack in the receiving space 100, the quenching plates of the splitter stack between the ribs 106 recording and out there and are held.
  • a longitudinal side 101 of the receiving space 100 is bounded by an integrally formed on the inside of the housing part half 150a of an insulating plate 150.
  • the upper outer contour line 150b of the plate half 150a is shaped so that when mirroring the outer contour line, this and its mirror image to the inner contour line of the recess 58, 46 of an insulating plate 50, 41 according to 4 and 5 or the recess 158, 146 of an insulating plate 150, 141 (see Fig. 10 to 13 ).
  • the mirror axis is an imaginary line 149 which extends parallel to the projection line of the inner contour line 150b on the broad side of the housing part 10a and by the furthest from the inside of the housing part portion 150c of the contour line 150b.
  • Fig. 11 shows in cross-section the assignment of an arc splitter plate package 124 to the integrally formed on the Isolierstoffgekoruseinnenseite insulating plate 141.
  • the arc splitter plate 124 in Fig. 11 is in accordance with the arc splitter stack 24 in Fig. 3 built up. Equivalent parts are in Fig. 11 with opposite Fig. 3 provided by 100 increased reference numerals.
  • the plate 141 in Fig. 10 consists of two halves 141 a and 141 b, which are arranged in mirror image to the axis 149. Each of the two halves 141 a and 141 b is integrally formed on one of the inner sides 10 a, 10 b of the insulating material.
  • the peripheral contour 142 of the so when assembling the insulating housing resulting insulating plate 141 corresponds to the peripheral contour of the quenching plates 125; it has an internal recess 1 44 which has an inlet locating area 145 and an enlarged area 146, the inlet locating area 145 opening in a V-shape to the point of contact.
  • the V-shape of the V-shape of the recess 27 in Fig. 2 customized.
  • the plate 141 is like the plate 41 of a gassing plastic, namely PA 6 or PA (6-6).
  • the Fig. 12 shows a plate 150, whose outer and inner contours are similar to those of the plate 50 in Fig. 5 ; however, the plate 150 is formed of two mirror-image equal halves 150a and 150b which contact each other at the mirror axis 149, each of the two halves 150a and 150b being formed on the inside of one of the two insulating housing parts 10a, 10b.
  • the contour parts, side parts and recesses of the plate 150 in Fig. 12 otherwise correspond to those of the plate 50 in FIG Fig. 5 , the respective reference numerals are opposite to those Fig. 5 increased by 100 each.
  • the Fig. 13 equals to Fig. 6 and shows a sectional view along the section line XIII-XIII of Fig. 12 , with two adjacent arc quenching plates 125 '125 ", between which the plate 150 is arranged, through the widened region 158, the arc 121 burns and acts on the material of the plate 150, so that this ausastast and a change in the atmosphere in the arc quenching chamber or produces a change in the gas pressure.
  • the Fig. 7 shows an equivalent circuit of an arc extinguishing chamber with u s (t) as the driving voltage, u- b (t) as the arc voltage and i ks (t) as a short-circuit current.
  • I ks and r ks denote inductance and resistance, respectively.
  • the Fig. 8 shows a representation of the voltage u and the current i over the time t.
  • the dashed line u s is the mains voltage and u b is the arc voltage. It can be seen that after opening of the contact point and inlet of the arc in the quenching chamber, the arc voltage oscillates in the range 60 until it re-enters the curve of the mains voltage u s after deletion of the arc (see below).
  • a short circuit occurs, with the prospective short circuit current being ip.
  • the arc voltage u b rises sharply in the region 61, and then passes into the region 60; This period of time is referred to as so-called arc voltage rise time.
  • the current ip is limited according to the line i ks .
  • the maximum value of the current i ks is the forward current, which the switch still lets in after the occurrence of the short circuit.
  • the forward current i d is limited.
  • the plate or plates may be latched to the guide rail or to the solid contact piece subsequent serving as a horn rail.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (10)

  1. Dispositif d'extinction d'arc pour un interrupteur électrique (10), l'interrupteur électrique (10) présentant un boîtier en matériau isolant qui est assemblé à partir d'une partie inférieure et d'une partie supérieure dans un plan parallèle à ses côtés larges, le dispositif d'extinction d'arc comprenant :
    - un élément de contact fixe (20),
    - un élément de contact mobile (14),
    - une chambre d'extinction dans laquelle, dans le cas d'une opération de commutation entre l'élément de contact fixe (20) et l'élément de contact mobile (14), un arc électrique est produit,
    - un paquet de tôles d'extinction d'arc (24) qui présente plusieurs tôles d'extinction d'arc (25),
    - des rails de guidage (22) qui guident l'arc électrique dans le paquet de tôles d'extinction d'arc (24),
    caractérisé en ce
    qu'au moins une plaque (41, 50) en matériau isolant dégageant un gaz est disposée dans le paquet de tôles d'extinction d'arc (24) à la place de l'une des tôles d'extinction, la périphérie extérieure de ladite plaque correspondant à la périphérie extérieure des tôles d'extinction d'arc (25), et la plaque présentant un évidement interne (44, 56), l'évidement interne (44, 56) présentant une région de rétrécissement d'entrée (45, 57) et une région élargie (46, 58) dont la région de rétrécissement d'entrée (45, 57) est ouverte vers le point de contact (14, 20).
  2. Dispositif d'extinction d'arc selon la revendication 1, caractérisé en ce que la région de rétrécissement d'entrée (57) présente des arêtes de limitation rectilignes.
  3. Dispositif d'extinction d'arc selon la revendication 1, caractérisé en ce que la région de rétrécissement d'entrée (45) s'élargit en forme de V vers le point de contact.
  4. Dispositif d'extinction d'arc selon l'une quelconque des revendications précédentes, caractérisé en ce que la région élargie (58) présente un contour interne approximativement rectangulaire.
  5. Dispositif d'extinction d'arc selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la région élargie (46) présente un contour interne approximativement circulaire.
  6. Dispositif d'extinction d'arc selon l'une quelconque des revendications précédentes, caractérisé en ce que l'évidement interne présente une forme en trou de serrure.
  7. Dispositif d'extinction d'arc selon l'une quelconque des revendications précédentes, caractérisé en ce que l'au moins une plaque (41, 50) limite d'un côté le paquet de tôles d'extinction d'arc (24).
  8. Dispositif d'extinction d'arc selon l'une quelconque des revendications précédentes, caractérisé en ce que l'au moins une plaque (41, 50) est façonnée entièrement ou au moins en partie au niveau du côté intérieur d'au moins une partie du boîtier isolant de l'interrupteur électrique.
  9. Dispositif d'extinction d'arc selon la revendication 8, caractérisé en ce que l'au moins une plaque (41, 50) est divisée en deux moitiés le long d'un axe de séparation s'étendant parallèlement à ses côtés longitudinaux et entre ceux-ci, chacune des deux moitiés étant façonnée au niveau du côté intérieur d'une des deux parties de boîtier isolant, de sorte que les deux moitiés, après l'assemblage du boîtier isolant constitué de la partie inférieure et de la partie supérieure, se réunissent le long de l'axe de séparation pour former l'au moins une plaque (41, 50).
  10. Dispositif d'extinction d'arc selon l'une quelconque des revendications précédentes, caractérisé en ce que le matériau isolant dégageant un gaz est du PA 6 ou du PA (6-6).
EP02024168.3A 2001-11-16 2002-10-30 Dispositif d'extinction d'arc pour un interrupteur électronique Expired - Lifetime EP1313117B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10156519 2001-11-16
DE10156519 2001-11-16
DE10242310A DE10242310A1 (de) 2001-11-16 2002-09-12 Lichtbogenlöschanordnung für ein elektrisches Schaltgerät
DE10242310 2002-09-12

Publications (3)

Publication Number Publication Date
EP1313117A2 EP1313117A2 (fr) 2003-05-21
EP1313117A3 EP1313117A3 (fr) 2005-02-16
EP1313117B1 true EP1313117B1 (fr) 2014-06-04

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EP02024168.3A Expired - Lifetime EP1313117B1 (fr) 2001-11-16 2002-10-30 Dispositif d'extinction d'arc pour un interrupteur électronique

Country Status (2)

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US (1) US6717090B2 (fr)
EP (1) EP1313117B1 (fr)

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CN107731595B (zh) * 2017-11-01 2019-07-23 广州紫研电气科技有限公司 一种基于齿轮的电力断路器的灭弧机构
CN107731596B (zh) * 2017-11-01 2019-11-12 江苏一开电力科技有限公司 一种采用齿轮的电力断路器的灭弧机构
CN107742599B (zh) * 2017-11-01 2020-03-31 国网湖北省电力有限公司随州供电公司 一种具有齿轮的电力断路器的灭弧机构
CN107785197B (zh) * 2017-11-01 2019-10-18 安徽龙和电力集团有限公司 一种基于弧形导轨的电力断路器的灭弧机构
CN107622898B (zh) * 2017-11-01 2019-09-27 明光诚信电子贸易有限公司 一种具有弧形导轨的电力断路器的灭弧机构
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Publication number Publication date
EP1313117A3 (fr) 2005-02-16
EP1313117A2 (fr) 2003-05-21
US20030094439A1 (en) 2003-05-22
US6717090B2 (en) 2004-04-06

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