EP0621615B1 - Disjoncteur basse tension - Google Patents

Disjoncteur basse tension Download PDF

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Publication number
EP0621615B1
EP0621615B1 EP94105111A EP94105111A EP0621615B1 EP 0621615 B1 EP0621615 B1 EP 0621615B1 EP 94105111 A EP94105111 A EP 94105111A EP 94105111 A EP94105111 A EP 94105111A EP 0621615 B1 EP0621615 B1 EP 0621615B1
Authority
EP
European Patent Office
Prior art keywords
contact
arc
plate
section
stationary contact
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
EP94105111A
Other languages
German (de)
English (en)
Other versions
EP0621615A1 (fr
Inventor
Francesco Perdoncin
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 SACE SpA
Original Assignee
ABB SACE SpA
SACE SpA
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
Application filed by ABB SACE SpA, SACE SpA filed Critical ABB SACE SpA
Publication of EP0621615A1 publication Critical patent/EP0621615A1/fr
Application granted granted Critical
Publication of EP0621615B1 publication Critical patent/EP0621615B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46Means for extinguishing or preventing arc between current-carrying parts using arcing horns
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34Stationary parts for restricting or subdividing the arc, e.g. barrier plate

Definitions

  • the invention is based on a low-voltage switch according to the preamble of patent claim 1.
  • a switch of the type mentioned with a fixed and a movable contact is known from US 2,467,937 A.
  • the power supply 4 for the fixed contact 13 is expanded in a U-shape and the two legs 11 of the U are bridged at their free ends by a yoke 12.
  • An arcing horn 9 with two plate-shaped sections arranged at an angle to one another is attached to the yoke.
  • the first section that adjoins the yoke and is inclined relative to the U carries the fixed contact 13.
  • the second section that adjoins the first is arranged parallel to the U and serves to guide a base point of a switching arc.
  • a plate 17 made of gas-emitting insulating material is arranged between the U and the arcing horn 9, a plate 17 made of gas-emitting insulating material is arranged.
  • the formation of the power supply 4 together with magnetic elements 22 and 29 causes the switching arc to migrate from the fixed contact 13 to the arcing horn 9, which makes it easier to extinguish the switching arc. Emigration is supported by gas, which is emitted by the insulating material when the arc is applied. Since the insulating material is arranged on the side of the fixed contact 13 or the arcing horn 9 facing away from the base point of the switching arc, that of the switching arc is in the region of the fixed contact 13 caused gas formation weak and affects the switching capacity of the switch only slightly.
  • the invention as defined in claim 1, is based on the object of increasing the switching power in a switch of the type mentioned.
  • the switch according to the invention is characterized by a low contact erosion and low wear of the arcing chamber with a high switching capacity. This is achieved in that the extinguishing gas emerging from the insulating part under the influence of an arc flows specifically in the direction of the quenching plate package, and that the base point of the switching arc rooted at the fixed contact is guided particularly quickly into the quenching plate package by this gas flow and by the force of the magnetic field of the current to be switched off .
  • the multi-pole switch shown in Figure 1 has a housing 1 made of insulating material.
  • the housing 1 comprises - separately for each pole - a predominantly plate-shaped, fixed contact 2 and a movable contact 3 which can be pivoted about a fixed axis 4 and which is connected to a flexible power connection.
  • Both contacts 2, 3 are in an arc quenching chamber 5 containing a quenching plate package 6 guided.
  • a recess 23 provided in the housing 1 enables a pivoting movement of the movable contact 3.
  • the size of the recess 23 is advantageously chosen such that it is hardly larger than the thickness of the movable contact 3.
  • the fixed contact 2 which can be seen more clearly from FIGS. 2 and 3, has a power supply with an opening 10 which is delimited by two legs 11 of equal size and a yoke 12.
  • the supplied current I is divided at the opening 10.
  • Half the current I / 2 flows through each leg 11.
  • the two streams I / 2 are brought together again in the yoke 12.
  • the yoke 12 continues in a contact tongue 13 which is slightly inclined with respect to the plate-shaped fixed contact, typically by approximately 10 to 30 °, and which is directed into the arc quenching chamber 5.
  • the opening 10 creates two turns in the power supply of the fixed contact 2.
  • the magnetic field generated by the current I / 2 flowing in these turns acts on an arc-extinguishing chamber on the contact tongue 13 in an electrically conductive manner, for example by riveting and / or soldering Extension piece 14, which extends the contact tongue 13 in the direction of the baffle plate 6 and together with the contact tongue 13 a plate-shaped Conductor forms.
  • the extension piece 14 is formed on the base of the contact tongue 13 on the yoke 12 as a contact element 7. In the switched-on position of the switch, this contact element 7 contacts an unspecified contact element of the movable contact 3.
  • An insulating part 15 made of a material that emits extinguishing gas when the arc occurs, such as preferably polytetrafluoroethylene, polyamide or polyoxymethylene, forms a side wall of the arc extinguishing chamber 5 that shields the current supply of the fixed contact 2 against the thermal effect of a switching arc.
  • the insulating part 15 has an opening 16 through which the formed by the contact tongue 13 and the extension piece 14 is passed. The lateral boundary surfaces of the opening 16 rest on the narrow side surfaces of the contact tongue 13 and thus make it more difficult for gas to pass from the arc quenching chamber 5.
  • the insulating part 15 On the arc extinguishing chamber side, the insulating part 15 has two wedge-shaped lugs 18.
  • the tips 19 of the lugs 18 start in the area of the contact element 7.
  • a section 20 of the bridge of the nose which attaches to the tip 19 of each nose 18 rises at an angle corresponding to the inclination of the contact tongue 13.
  • the bridge of the nose Above the contact element 7 in the end section of the extension piece 14, the bridge of the nose has a section which is formed parallel to the plate-shaped part of the fixed contact 2 and which is increasingly moving away from the part of the extension piece 14 which is guided through the opening 16.
  • the two sections 20 of the lugs 18 and a part 17 of the insulating part 15 connecting the two lugs at their tips 19 protrude considerably beyond the contact element 7 and a section of the extension piece 14 adjoining the contact element 7 and thus form a groove-shaped depression 21, the base of which is from the contact element 7 and the adjoining section of the extension piece 14 is formed Fig.1).
  • the function of the switch according to the invention is now as follows: In the switched-on state, the current I flows in a current path which leads from the current supply of the fixed contact 2 with the two legs 11 and the contact tongue 13 via the contact element 7 and the movable contact 3 to the flexible current connection of the movable contact.
  • the current I at the opening 10 in the two U-shaped legs 11 is divided into two half-size currents I / 2 flowing parallel to one another.
  • the two currents I / 2 are brought together again in the yoke 12 and conducted in the contact tongue 13 as current -I with a practically reversed direction of direction relative to the current I running in the plate-shaped part of the current supply to the contact element 7.
  • Each of the two legs 11 is in each case part of one of two windings provided in the power supply to the contact element 7, in which the contact tongue 13 is also contained.
  • the contact tongue 13 with the contact element 7 and the movable contact 3 form an upwardly extending loop in this current path.
  • the movable contact 3 When switched off, the movable contact 3 is pivoted to the right into the position shown in FIG. 1 and an arc is formed which is based on the contact element 7 and the contact element (not shown) of the movable contact 3.
  • the swiveling movement is supported by the magnetic field of the current to be switched off, which widens the loop formed by the contact tongue 13, the arc and the movable contact 3 and thereby leads the movable contact 3 to the right.
  • the magnetic field of the current flowing in the loop drives the arc to the arc stack 6.
  • the base point of the arc burning on the contact element 7 also heats up the surrounding material of the insulating part 15 in the region of the lugs 18 and the connecting part 17, whereby this material releases extinguishing gas. Because the base and a part of the arc starting at the base point is practically surrounded by insulating material, the arc releases a large part of its energy to the insulating material. In this way, relatively large amounts of extinguishing gas are formed from the insulating part 15 even with small flows. At the same time, it is ensured that this quenching gas has a preferential flow directed towards the quenching plate packet 6, which drives the base point of the arc rooted on the contact element 7 into the extension piece 14.
  • a third force on the arc exerts the magnetic field of the current flowing through the two windings provided in the current supply of the fixed contact 2. This field supports the extinguishing gas flow when the arc base point is shifted from the contact element 7 to the extension piece 14.
  • the combined action of these forces leads the arc very quickly and safely into the arc stack 6 and extinguishes it there.
  • the extinguishing gas outgassed from the insulating part 15 ensures that the extinguishing sections delimited by the extinguishing plates are free of ionized particles, so that the extinguishing sections solidify rapidly very rapidly and, even when switching high currents in the n / a range, undesired reignitions are eliminated.
  • it is particularly advantageous here that contact erosion and wear of the arc quenching chamber 6 are drastically reduced.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Claims (3)

  1. Disjoncteur basse tension muni d'un contact fixe (2) et d'un contact mobile (3) et d'une chambre d'extinction (5) de l'arc électrique logeant les deux contacts ainsi qu'un paquet de tôles d'extinction (6), avec laquelle une section en forme de plaque d'une arrivée de courant du contact fixe (2) est étendue en forme de U, les deux extrémités libres des deux branches (11) du U sont court-circuitées par une traverse (12) et une pièce conductrice est montée sur la traverse (12), laquelle pièce conductrice est formée par une languette de contact (13) du contact fixe (2) et d'une pièce de prolongation (14) fixée sur celle-ci, laquelle pièce conductrice est inclinée par rapport à la section en forme de plaque de l'arrivée de courant dans le sens du paquet de tôles d'extinction (6) et agit conjointement avec une pièce isolante (15) en un matériau émettant du gaz d'extinction sous l'effet de l'arc électrique, laquelle pièce isolante protège la section en forme de plaque de l'arrivée de courant du contact fixe (2) par rapport à la chambre d'extinction (5) de l'arc électrique, caractérisé par le fait que la pièce isolante est réalisée en forme de plaque, que la pièce de prolongation (14) s'étend en direction du paquet de tôles d'extinction (6), que la pièce isolante (15) est munie d'un orifice (16) rectangulaire et présentant des surfaces de délimitation latérales, orifice au travers duquel la pièce conductrice en forme de plaque est guidée de telle façon que les surfaces de délimitation reposent sur les minces surfaces latérales de la languette de contact (13), et que la pièce isolante (15) et le contact fixe (2) forment un enfoncement en forme de rainure du côté de la chambre d'extinction dans le fond duquel est disposé un élément de contact (7) du contact fixe (2) agissant conjointement avec le contact mobile (3) en position enclenchée du disjoncteur.
  2. Disjoncteur selon la revendication 1, caractérisé par le fait que l'enfoncement est délimité latéralement par deux mentonnets (18) de la pièce isolante (15), lesquels s'étendent en direction du paquet de tôles d'extinction (6) et présentent à chaque fois une première section (20) avec un dos de mentonnet disposé parallèlement à la pièce de prolongation (14).
  3. Disjoncteur selon la revendication 2, caractérisé par le fait que les mentonnets (18) présentent à chaque fois une deuxième section rattachée à la première (20), laquelle s'étend parallèlement à la section en forme de plaque de l'arrivée de courant du contact fixe (2) et dans la zone de laquelle la pièce de prolongation (14) dépasse de la pièce isolante (15).
EP94105111A 1993-04-21 1994-03-31 Disjoncteur basse tension Expired - Lifetime EP0621615B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT93MI000789A IT1264164B1 (it) 1993-04-21 1993-04-21 Interruttore di bassa tensione in scatola isolante
ITMI930789 1993-04-21

Publications (2)

Publication Number Publication Date
EP0621615A1 EP0621615A1 (fr) 1994-10-26
EP0621615B1 true EP0621615B1 (fr) 1997-02-12

Family

ID=11365838

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94105111A Expired - Lifetime EP0621615B1 (fr) 1993-04-21 1994-03-31 Disjoncteur basse tension

Country Status (6)

Country Link
US (1) US5475193A (fr)
EP (1) EP0621615B1 (fr)
DE (2) DE4332546A1 (fr)
ES (1) ES2102088T3 (fr)
IT (1) IT1264164B1 (fr)
ZA (1) ZA942756B (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5761025A (en) * 1995-02-13 1998-06-02 Iversen; Arthur H. Low cost power switchgear
US5734547A (en) * 1995-02-13 1998-03-31 Iversen; Arthur H. Power switchgear
FR2788372B1 (fr) * 1999-01-11 2001-02-23 Schneider Electric Ind Sa Chambre d'extinction d'arc dont les parois laterales sont en materiau composite, et appareillage de coupure comportant une telle chambre
US6392512B1 (en) 1999-11-05 2002-05-21 Siemens Energy & Automation, Inc. Stationary line bus assembly
IT1314358B1 (it) * 1999-12-31 2002-12-09 Abb Ricerca Spa Camera d'arco per interruttori di bassa tensione
FR2803687B1 (fr) * 2000-01-07 2002-02-22 Schneider Electric Ind Sa Pole pour disjoncteur electrique, muni d'une chambre d'extinction d'arc large
US6926547B2 (en) 2001-07-06 2005-08-09 Delphi Technologies, Inc. Electrical connector
DE102005007303B4 (de) * 2005-02-17 2013-03-21 Abb Ag Elektrisches Installationsgerät mit Lichtbogen-Vorkammerraum, Lichtbogenleitschienen und strombegrenzender Lichtbogenlöscheinrichtung
US7551050B2 (en) * 2006-09-22 2009-06-23 Rockwell Automation Technologies, Inc. Contactor assembly with arc steering system
US7716816B2 (en) * 2006-09-22 2010-05-18 Rockwell Automation Technologies, Inc. Method of manufacturing a switch assembly
US7863537B2 (en) * 2007-10-09 2011-01-04 Eaton Corporation Gassing insulator assembly, and conductor assembly and electrical switching apparatus employing the same
AT509277A1 (de) 2008-03-05 2011-07-15 Moeller Gebaeudeautomation Gmbh Schaltgerät
JP5856426B2 (ja) * 2011-10-07 2016-02-09 富士電機株式会社 接点装置及びこれを使用した電磁接触器
CN104538250B (zh) * 2015-02-03 2016-08-24 佛山市川东磁电股份有限公司 一种磁力开关
FR3040238B1 (fr) * 2015-08-18 2019-01-25 Schneider Electric Industries Sas Disjoncteur electrique
EP3772742A1 (fr) * 2019-08-05 2021-02-10 ABB S.p.A. Pôle de commutation basse tension
FR3107395B1 (fr) * 2020-02-19 2022-12-30 Socomec Sa Chambre de coupure à soufflage magnétique pour un appareil de coupure électrique et appareil de coupure électrique équipé d’une telle chambre

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US3818165A (en) * 1972-06-09 1974-06-18 Gen Electric Electric circuit interrupter
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Also Published As

Publication number Publication date
ES2102088T3 (es) 1997-07-16
ZA942756B (en) 1996-02-16
ITMI930789A0 (it) 1993-04-21
DE59401787D1 (de) 1997-03-27
US5475193A (en) 1995-12-12
DE4332546A1 (de) 1994-10-27
ITMI930789A1 (it) 1994-10-21
IT1264164B1 (it) 1996-09-17
EP0621615A1 (fr) 1994-10-26

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