EP0720772A1 - Sectionneur de puissance pourvu d'un systeme d'extinction d'arc electrique - Google Patents

Sectionneur de puissance pourvu d'un systeme d'extinction d'arc electrique

Info

Publication number
EP0720772A1
EP0720772A1 EP94927482A EP94927482A EP0720772A1 EP 0720772 A1 EP0720772 A1 EP 0720772A1 EP 94927482 A EP94927482 A EP 94927482A EP 94927482 A EP94927482 A EP 94927482A EP 0720772 A1 EP0720772 A1 EP 0720772A1
Authority
EP
European Patent Office
Prior art keywords
flow channel
circuit breaker
arc extinguishing
extinguishing device
contact 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.)
Granted
Application number
EP94927482A
Other languages
German (de)
English (en)
Other versions
EP0720772B1 (fr
Inventor
Karl-Heinz Manthe
Guenter Seidler-Stahl
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0720772A1 publication Critical patent/EP0720772A1/fr
Application granted granted Critical
Publication of EP0720772B1 publication Critical patent/EP0720772B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342—Venting arrangements for arc chutes
    • 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
    • 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
    • H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber
    • 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
    • H01H2009/348—Provisions for recirculation of arcing gasses to improve the arc extinguishing, e.g. move the arc quicker into the arcing chamber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H2077/025—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with pneumatic means, e.g. by arc pressure
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/1009—Interconnected mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition

Definitions

  • the invention relates to an electrical circuit breaker
  • a switching contact arrangement which has a fixed and a movable contact part
  • An arc extinguishing device having quenching plates with an inlet opening facing the contact parts and an outlet opening facing away from the contact parts and
  • a circuit breaker of this type is known from DE-C-1 619 463.
  • the additional chamber is arranged in this circuit breaker in the direction of the switching movement of the movable contact part to the arc extinguishing device and contains a perforated plate or sieve through which the switching gases must pass before they pass through a blowout opening into the open air. This measure, however, only reduces the blow-out space of the circuit breaker, while increasing the switching capacity is not one of the development goals of this circuit breaker.
  • the arc quenching chamber is subdivided by insulating plates running transversely to the quenching plates in such a way that a central space provided for the running of the switching arc and two lateral spaces delimited by the walls of the arc quenching device are formed. In these side rooms, air flows in the direction of the contact arrangement into the negative pressure area behind the arc, thus reducing pressure opposites and the risk of reignition.
  • the switchgear according to DE-B-1 185 269 belongs to the type of circuit breakers, the switching capacity of which is adapted to the task, to cables leading to end users in building installations against damage
  • circuit breakers must be able to cope with the short-circuit power which is higher by an order of magnitude and which occurs at the feed-in points of entire dining areas of public energy supply or in large industrial plants.
  • circuit breakers are therefore not simply circuit breakers that are enlarged several times. Rather, each of the switch types mentioned represents an independent development. Therefore, measures which have proven to be favorable for the switching capacity in one switch type cannot be transferred with certainty to the other switch type with certainty.
  • the invention has for its object to make the principle of pressure compensation applicable to a circuit breaker of the type mentioned.
  • the aforementioned additional chamber is designed as a flow channel which directs the switching gases to the side of the contact parts facing away from the inlet opening of the arc extinguishing device and in that the insulating material housing which accommodates the switch contact arrangement, the arc extinguishing device and the flow channel form a gas space which is essentially closed off from the outside of the circuit breaker.
  • the circuit breaker according to the invention is not only characterized by the desired increased switching capacity, but also does not require any distance from earthed components because no switching gases can escape.
  • the main task of the separate flow channel which is to provide a fluidic feedback from the outlet of the arc quenching device to the switch contact arrangement, can have further features which are suitable for increasing the switching capacity or expanding the area of application of the circuit breaker.
  • a device for further deionization of the switching gases can be arranged in the flow channel.
  • This device can be used in perforated plates, wire mesh or similar means are known to be suitable which, with the lowest possible flow resistance, are suitable for cooling the switching gases and neutralizing charge carriers.
  • a valve which is effective in the direction of the flow of the switching gases can be arranged in the flow channel on the side of the contact parts facing away from the inlet opening of the arc extinguishing device.
  • the valve thus keeps the flow channel closed as long as there is no flow and if a pressure wave occurs on the contact parts when the switching arc is ignited.
  • the valve thus has the effect that the part of the pressure wave acting on one side is used to drive the switching arc in the direction of the arc extinguishing device.
  • the valve can be opened by the switching gases and under the influence of
  • a movable trigger element acting on the drive device in the sense of the opening of the contact parts can be arranged in the flow channel.
  • the trigger element can be connected to the trigger shaft in the circuit breaker of the circuit breaker.
  • Circuit breakers of the type considered here generally have a configuration that takes into account the thermal lift of a switching arc.
  • a section of the flow channel adjoining the arc quenching device can be arranged in be upstream of the direction of the switching movement of the movable contact part of the arc extinguishing device, a further section of the flow channel being arranged upstream of the switching contact arrangement and being flush with the first section of the flow channel.
  • the switching gases can be arranged in the gas duct deflecting the flow channel at the outlet opening of the arc extinguishing device and the flow channel can have a contour that encompasses the switching contact arrangement approximately in an arc shape. As a result, the flow losses are kept low, so that the cross section of the flow channel can be relatively small.
  • an advantageous design is that the flow channel is arranged next to the arc quenching device or next to the switch contact arrangement with respect to the level of the switching movement of the movable contact part of the switch contact arrangement.
  • the space requirement for the flow channel affects the depth of the circuit breaker.
  • each pole of a multi-pole circuit breaker has a pole carrier with a cross-sectional shape corresponding approximately to an asymmetrical "H", with a larger space through the crossbar of the "H" shape in connection with the wall parts closing the pole carrier to accommodate the switch contact arrangement and a smaller space for forming at least a part of the flow channel is formed.
  • the pole carrier can, however, be dimensioned at a lower height than the common height of
  • Switch contact arrangement and arc extinguishing device corresponds.
  • the arc quenching device and a first section of the flow channel can be accommodated in a common quenching chamber housing to be placed on the pole carrier.
  • FIG. 1 shows, as a first exemplary embodiment, a low-voltage circuit breaker with an insulating housing, partly in a lateral section.
  • FIG. 2 shows the pole unit according to FIG. 1, partially cut in the direction of an arrow II in FIG. 1.
  • Figure 3 shows a schematic representation of the switching poles of a three-pole low-voltage circuit breaker.
  • FIG. 4 shows the top view of the pole units according to FIG. 3 with the arc quenching device removed.
  • the pole unit of a low-voltage circuit breaker shown in FIG. 1 and designated as a whole by 1 has a common insulating housing 2 for one as a whole at 3 designated switch contact arrangement and an arc extinguishing device also designated as a whole with 4.
  • the switch contact arrangement 3 located in the lower part of the insulating material housing 2 has a movable contact part 5 designed as a contact lever, which can be pivoted about a pivot bearing 6.
  • the switch-off position is brought about in a known manner by pivoting the contact part 5 around the rotary bearing 6 in a clockwise direction.
  • the movable contact part 5 cooperates with a fixed contact part 7, which is directly on a wall of the
  • Isolierstoffgeophuses 2 attached to the outside of the connecting rail 10 is attached.
  • the pole unit 1 has a lower connecting bar 11, the inner end of which is connected to the movable contact part 5 by means of a flexible current band 12.
  • the movable contact part 5 is actuated in a manner not shown by a schematically indicated drive device 8 for switching the pole unit 1 on and off.
  • the already mentioned arc quenching device 4 is located in the insulating housing 2 above the switch contact arrangement 3. It has its own quenching chamber housing 13 which can be inserted into the insulating housing 2 of the pole unit 1 from above and connected to it.
  • the arc extinguishing device 4 has, in a known manner, quenching plates 14 arranged parallel to one another and two arc guide rails 15 and 16 delimiting the arrangement of the quenching plates 14, of which the arc guide rail 15 is connected to the fixed contact part 7.
  • An inlet opening of the arc quenching device is designated 17, an outlet opening 18.
  • An essential further feature of the pole unit 1 is a flow channel 19, the first, upper section 20 of which is contained in the arcing chamber housing 13, while a second, lower section 21 only of wall parts of the insulating material housing 2 is limited.
  • the flow channel 19 is thus upstream of the switch contact arrangement 3 and the arc quenching device 4, if one looks at the pole unit 1 in the direction of the arrow II in FIG. 1, which corresponds to the direction of view of a complete circuit breaker.
  • the quenching chamber housing 13 is provided in the region of the outlet opening 18 with gas guide pieces 22 and a rounded wall part 23.
  • a device 24 for deionizing and cooling the switching gases can be an arrangement of perforated sheets, expanded metal, wire mesh or similar means.
  • the lower part of the second section 21 of the flow channel 19 is designed in the shape of an arc or trough.
  • a rib 25 in the insulating material housing 2 ensures that the air or switching gases are guided up to approximately the pivot bearing 6 of the movable contact part 5 and due to the relative proximity of the end of the gas guide rib 25 and the pivot bearing 6 there is no significant leak due to the pivoting movement of the movable contact part 5 arises.
  • the flow channel 19 is supplemented by a nozzle section 26, which is located below the fixed contact part 7 and which is more or less completely closed by a valve 27 designed to be pivotable in the state of rest of the pole unit 1.
  • the valve 27 assumes the rest position shown under the influence of gravity and can be moved by a pivot bearing 30 up to the dash-dotted end position, which is sufficiently distant from an upright dead center position.
  • the switch contact arrangement 3 is connected to a drive device 8. As indicated in FIG. 1, this can preferably be arranged in front of the insulating material housing 2 on the right-hand side in FIG. 1 and can be connected to the movable contact part 5 by means of a coupling rod.
  • a coupling rod 31 can reach through a shaft 32, as is indicated schematically in FIG. 2. Since the coupling rod 31 is only a narrow component, the space requirement of the shaft 32 is also small, so that the flow channel 17 is only slightly narrowed.
  • the flow channel 19 can also contain a triggering element 33 designed as a swing flap, which is suitable for the particularly rapid triggering of the switching lock of a current-limiting circuit breaker. This is indicated in FIG. 1 by a dash-dotted connection 34 between the trigger element 33 and the drive device 8.
  • valve 30 reflects the pressure wave and thereby exerts an additional propulsive force on the switching arc in the direction of the arc extinguishing device 4. Due to the substantially larger cross section of the arc extinguishing device 4 compared to the space below the contact parts 5 and 7 the pressure wave can propagate in the direction of the arc quenching device 4 essentially unhindered. A gas flow occurs there, in particular after the switching arc has passed onto the arc guide rails 15 and 16 and the associated extension and contact with a larger air volume, which is deflected by the gas guide pieces 22 into the flow channel 19.
  • Quenching plates 14 are accelerated and the arc quenching is thereby favored because the arc base points are guided more quickly over cold sections of the quenching plates 14. This results in a significantly increased switching capacity of the new arrangement. At the same time, no gas is ejected because the air used as an extinguishing agent is expanded and cooled in a closed circuit.
  • FIGS. 1 and 2 To build a multi-pole circuit breaker, several of the pole units 1 shown in FIGS. 1 and 2 can be arranged next to one another, as is indicated by dash-dotted lines in FIG. 2. Another exemplary embodiment suitable for the construction of multi-pole circuit breakers will now be explained with reference to FIGS. 3 and 4.
  • Each of the pole units 40 according to FIG. 3 has a pole carrier 41 which essentially has a schematically indicated switch contact arrangement 42 and on which an arcing chamber unit 43 is placed.
  • each of the pole carriers 41 has the shape of an asymmetrical "H" in cross section, a larger space 45 for receiving the switch contact arrangement 42 and a smaller space 46 being formed by the crosspiece 44 of the H shape.
  • the rooms 45 and 46 are closed off by side end walls 47 and intermediate walls 50.
  • a flow channel 51 is arranged on the side of the switch contact arrangement 42.
  • a first upper section 52 of the flow channel 51 is contained in the quenching chamber housing 43, in addition to an actual arc quenching device 53.
  • a second, lower section 54 of the flow channel 51 is wholly or partly formed by the smaller space 46 in the pole carrier 41.
  • FIGS. 3 and 4 permits the construction of circuit breakers with any number of pole units, both the number of poles and the number of units connected in parallel per pole being selectable.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)

Abstract

L'invention concerne un sectionneur de puissance qui comporte une unité polaire (1) pourvue d'un dispositif de commutation (3), à pièce de contact d'un dispositif d'extinction d'arc électrique (4) et d'un canal de dégagement (19). Les gaz de commutation qui sortent du système d'extinction d'arc électrique (4), passent par le canal d'écoulement (19) et sont acheminés, après refroidissement, jusqu'au côté du dispositif de commutation (3), qui est opposé au dispositif d'extinction d'arc électrique (4). Le compartiment à gaz dans son ensemble est sensiblement fermé. Le canal de dégagement (10) peut contenir un clapet (27) et un système (24) de désionisation.
EP94927482A 1993-09-24 1994-09-16 Sectionneur de puissance pourvu d'un systeme d'extinction d'arc electrique Expired - Lifetime EP0720772B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4333278 1993-09-24
DE4333278A DE4333278A1 (de) 1993-09-24 1993-09-24 Leistungsschalter mit einer Lichtbogenlöscheinrichtung
PCT/DE1994/001110 WO1995008832A1 (fr) 1993-09-24 1994-09-16 Sectionneur de puissance pourvu d'un systeme d'extinction d'arc electrique

Publications (2)

Publication Number Publication Date
EP0720772A1 true EP0720772A1 (fr) 1996-07-10
EP0720772B1 EP0720772B1 (fr) 1997-04-02

Family

ID=6499035

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94927482A Expired - Lifetime EP0720772B1 (fr) 1993-09-24 1994-09-16 Sectionneur de puissance pourvu d'un systeme d'extinction d'arc electrique

Country Status (5)

Country Link
US (1) US5731561A (fr)
EP (1) EP0720772B1 (fr)
JP (1) JPH09503090A (fr)
DE (2) DE4333278A1 (fr)
WO (1) WO1995008832A1 (fr)

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DE19643607A1 (de) * 1996-05-13 1997-11-20 Siemens Ag Leistungsschalter für Niederspannung mit Anschlußschienen
FR2750531B1 (fr) * 1996-06-28 1998-08-07 Schneider Electric Sa Dispositif de desionisation des gaz notamment des gaz de coupure dans une chambre d'extinction d'arc d'un disjoncteur basse tension a boitier moule et chambre d'extinction d'arc equipee de ce dispositif
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US6144540A (en) 1999-03-09 2000-11-07 General Electric Company Current suppressing circuit breaker unit for inductive motor protection
US6157286A (en) 1999-04-05 2000-12-05 General Electric Company High voltage current limiting device
DE19920042C1 (de) 1999-04-23 2001-01-18 Siemens Ag Schaltgasdämpfer für Niederspannungs-Leistungsschalter
US6373357B1 (en) * 2000-05-16 2002-04-16 General Electric Company Pressure sensitive trip mechanism for a rotary breaker
DE10131560C1 (de) * 2001-06-29 2003-02-06 Aeg Niederspannungstech Gmbh Ausblassystem für eine Plug-in-Komponente
DE10149019C1 (de) * 2001-09-28 2003-06-18 Siemens Ag Lichtbogenlöscheinrichtung für Niederspannungs-Schaltgeräte
FR2839195B1 (fr) 2002-04-29 2004-07-23 Schneider Electric Ind Sa Appareillage electrique de coupure comportant une chambre d'extinction d'arc munie d'ailettes de desionisation
DE102004058764A1 (de) * 2004-11-30 2006-06-01 Siemens Ag Anschlussschiene für flexible elektrische Leiter
FR2879016B1 (fr) * 2004-12-06 2007-02-09 Schneider Electric Ind Sas Dispositif electrique de coupure avec recyclage des gaz de coupure
US20060213873A1 (en) * 2005-03-23 2006-09-28 Eaton Corporation ARC chute assembly and electric power switch incorporating same
US7750770B2 (en) * 2006-09-25 2010-07-06 Rockwell Automation Technologies, Inc. Gas diverter for an electrical switching device
RU2556240C2 (ru) 2009-09-18 2015-07-10 Шнейдер Электрик Эндюстри Сас Коммутационное устройство, имеющее, по меньшей мере, один однополюсной отключающий блок, содержащий контактный мостик, и прерыватель цепи, содержащий одно такое устройство
EP2561534B1 (fr) * 2010-04-19 2018-07-11 CARLING TECHNOLOGIES, Inc. Interrupteur de circuit à capacités améliorées d'extinction d'arc
US8866034B2 (en) 2011-04-14 2014-10-21 Carling Technologies, Inc. Arc runner with integrated current path that develops a magnetic field to boost arc movement towards splitter plates
WO2013087700A1 (fr) 2011-12-13 2013-06-20 Abb Technology Ag Environnement de convertisseur haute tension rendu étanche et isolé au gaz pour plateformes en mer
FR2986659B1 (fr) * 2012-02-02 2014-02-14 Schneider Electric Ind Sas Bloc de coupure unipolaire et dispositif de coupure comportant un tel bloc
DE102014002902B4 (de) 2014-02-27 2019-08-01 Schaltbau Gmbh Löschkammer für ein Schütz und ein Schütz zum Löschen von Lichtbögen
EP3439004A1 (fr) * 2017-08-01 2019-02-06 Siemens Aktiengesellschaft Élément de déclenchement d'un déclencheur par pression, déclencheur par pression doté d'un tel élément de déclenchement et commutateur électrique
FR3073974B1 (fr) * 2017-11-23 2019-12-20 Schneider Electric Industries Sas Disjoncteur multipolaire a basse tension
DE102017131442B4 (de) * 2017-12-29 2023-11-23 Eaton Electrical Ip Gmbh & Co. Kg Ein- oder mehrpoliger Leistungsschalter und modulares System umfassend einen solchen Leistungsschalter
CN113593994B (zh) * 2018-06-15 2023-05-05 上海电器科学研究所（集团）有限公司 一种具有优良磁吹效果的导电回路系统
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KR102542379B1 (ko) * 2020-03-03 2023-06-12 엘에스일렉트릭(주) 아크 소호 조립체
CN114256010B (zh) * 2021-11-15 2024-04-09 双杰电气合肥有限公司 常压密封开关用极柱及常压密封开关
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Also Published As

Publication number Publication date
EP0720772B1 (fr) 1997-04-02
DE4333278A1 (de) 1995-03-30
US5731561A (en) 1998-03-24
DE59402317D1 (de) 1997-05-07
WO1995008832A1 (fr) 1995-03-30
JPH09503090A (ja) 1997-03-25

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