EP3327742B1 - Dispositif d'extinction d'un arc électrique et disjoncteur électromécanique - Google Patents

Dispositif d'extinction d'un arc électrique et disjoncteur électromécanique Download PDF

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Publication number
EP3327742B1
EP3327742B1 EP17195570.1A EP17195570A EP3327742B1 EP 3327742 B1 EP3327742 B1 EP 3327742B1 EP 17195570 A EP17195570 A EP 17195570A EP 3327742 B1 EP3327742 B1 EP 3327742B1
Authority
EP
European Patent Office
Prior art keywords
quenching
arc
plates
switching device
protective switching
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.)
Active
Application number
EP17195570.1A
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German (de)
English (en)
Other versions
EP3327742A1 (fr
Inventor
Winfried Vierling
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
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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 EP3327742A1 publication Critical patent/EP3327742A1/fr
Application granted granted Critical
Publication of EP3327742B1 publication Critical patent/EP3327742B1/fr
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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
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts
    • H01H9/362—Mounting of plates in 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
    • 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
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • 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

Definitions

  • the invention relates to an arc extinguishing device for an electromechanical protective switching device, which is preferably designed as a circuit breaker, as a circuit breaker or as a residual current circuit breaker.
  • the arc extinguishing device is designed to extinguish an arc that arises when a switching contact of the protective switching device is opened and for this purpose has an extinguishing chamber in which a predefined number n of extinguishing plates in a stacking direction R are spaced apart from one another and can be arranged parallel to one another.
  • the arc extinguishing device has at least one stack of quenching plates which is arranged in the quenching chamber and has a predefined number m of quenching plates arranged parallel to one another and which are kept apart from one another in the stacking direction R by means of a holding device.
  • the invention relates to a protective switching device which is designed, for example, as a circuit breaker, a line circuit breaker or a residual current circuit breaker and has such an arc extinguishing device for extinguishing an arc which arises when a switching contact of the protective switching device is opened.
  • circuit breakers include, for example, circuit breakers, miniature circuit breakers or residual current circuit breakers. They are used in particular as switching and safety elements in electrical power supply networks and are used to monitor and protect an electrical circuit. Circuit breakers are specially designed for high currents.
  • a circuit breaker which is also referred to as a "miniature circuit breaker” (MCB)
  • MBC miniature circuit breaker
  • MCA miniature circuit breaker
  • Circuit breakers and miniature circuit breakers guarantee safe disconnection in the event of a short circuit and protect consumers and systems against overload. In this way, for example, electrical lines are protected from damage caused by excessive heating as a result of excessive electrical current.
  • the respective protective switching device is electrically conductively connected to an electrical line of the circuit to be monitored via two connecting terminals in order to interrupt the electrical current in the respective line if necessary.
  • the protective switching device has a switching contact with a fixed contact and a movable contact movable relative to it.
  • the moving contact can be actuated via a switching mechanism of the protective switching device, so that the switching contact is opened and closed can.
  • a predefined state for example a short circuit or an electrical overload
  • the switching mechanism is activated and the switching contact is thus opened in order to interrupt the electrical line and thus separate the monitored circuit from the electrical line network.
  • Such protective switching devices are also known in the field of low voltage technology as modular devices.
  • the DE 10 2008 021 025 A1 an arc quenching assembly for an electrical switch.
  • arc-quenching plates are arranged in at least two groups, the distance of the quenching plates delimiting the respective group from the respectively adjacent group or a respectively adjacent arc guide rail being greater than the spacing of the quenching plates within a group.
  • Two groups or three groups of quenching plates can be provided, each with the same number of quenching plates per group.
  • the EP 2 608 234 A1 a switching device suitable for direct current operation.
  • a first erasing device can be arranged vertically above a first contact pair and a second erasing device can be arranged vertically above a second contact pair.
  • the first quenching device comprises first quenching plates which are arranged parallel to one another.
  • the two extinguishing devices are constructed identically to one another.
  • a circuit breaker which has a fixed contact piece and a movable contact piece.
  • the fixed contact piece merges into a first arc guide plate and a second arc guide plate is provided parallel to the first arc guide plate.
  • the arc quenching device according to the invention for an electromechanical protective switching device has a quenching chamber area in which a predefined number n of quenching plates are spaced apart from one another in a stacking direction R and can be arranged parallel to one another. Furthermore, the arc extinguishing device has a quenching plate stack which is arranged in the quenching chamber region and has a predefined number m of quenching plates arranged parallel to one another, which are kept apart from one another in the stacking direction R by means of a holding device, the number m of the quenching plates forming a quenching plate stack being smaller is the number n of quenching plates that can be arranged in the quenching chamber area.
  • two quenching plate packs are arranged side by side in the stacking direction R in the quenching chamber area, the number m 1 of the quenching plates of the first quenching plate stack and the number m 2 of the quenching plates of the second quenching plate stack satisfying the condition m 1 + m 2 ⁇ n.
  • the phrase “next to one another in the stacking direction R” can also be used.
  • the arrangement of two quenching plate packs in the quenching chamber area already enables variants to be formed. Since the two quenching plate packages have a different number of quenching plates, three variants of the arc quenching device can be implemented.
  • the arc quenching device according to the invention can also be implemented with more than two quenching plate packages.
  • the number n which describes the maximum number of quenching plates that can be arranged in the quench chamber area, has a limiting effect. It should be noted, however, that the sum of the number m i of the extinguishing plates of the i extinguishing plate packages is at most as large as the number n of the maximum extinguishing plates that can be arranged in the area of the extinguishing chamber. In this way, further configurations of the arc extinguishing device and of the electromechanical protective switching device can be implemented.
  • the electromechanical protective switching device has an insulating material housing in which the components of the protective switching device are received and held, and an arc extinguishing device of the type described above. Furthermore, the insulating material housing has a preconfigured area which is designed to accommodate the arc extinguishing device.
  • the arc extinguishing device is accommodated in the insulating material housing in a predefined manner.
  • This area is designed in such a way that it is suitable for accommodating the arc extinguishing device independently of the number i of the extinguishing plate packs used to implement the arc extinguishing device and the number m of extinguishing plates per extinguishing plate packet.
  • the quenching chamber area is formed in the insulating material housing, the insulating material housing having at least one receiving element for receiving and holding the at least one quenching plate package.
  • the quenching plate stack or the quenching plate packages are received and held in a predefined manner in the insulating material housing.
  • the quenching plate stack (s) are positioned in a predefined position in the quenching chamber area by the receiving element (s), i.e. recorded and held - regardless of the number i and size m of the individual quenching plate packages.
  • the at least one quenching plate stack is arranged centrally in the stacking direction R in the quenching chamber area, such that further quenching plates or quenching plate packs can be arranged in the quenching chamber region both above and below the quenching plate pack.
  • the central arrangement makes it easy to add additional quenching plate packages, but also individual quenching plates.
  • FIGS 1 to 3 show the schematic structure of a protective switching device 1 with an arc extinguishing device 10, as are known from the prior art.
  • Figure 1 shows a side view of the protective switching device 1 with the arc extinguishing device 10 in a schematic representation;
  • Figures 2 and 3 the structure of a quenching plate stack 12 of the arc quenching device 10 is shown schematically in a side view or in a perspective view.
  • the protective switching device 1 has an input connection 3-1 and an output connection 3-2, which are received and held in an insulating housing 2 of the protective switching device 1.
  • the input connection 3-1 and the output connection 3-2 are designed for contacting the protective switching device 1 with an electrical line (not shown) and each have a clamping screw 3-3 for clamping the electrical connection conductors.
  • the input connection 3-1 is electrically conductively connected via an electrical coil 8 to a fixed contact 4 arranged in a fixed manner in the insulating material housing 2.
  • the fixed contact 4 forms, together with a movable contact 5 movably mounted relative thereto, a switching contact which can be opened and closed in order to interrupt or enable the current flow between the input connection 3-1 and the output connection 3-2.
  • the moving contact 5 is fastened to a moving contact carrier 6 rotatably mounted in the insulating material housing 2.
  • the moving contact carrier 6 is in turn electrically connected to the output connection 3-2.
  • the insulating housing 2 has an actuating element 9 on a front side, which is in operative connection with the moving contact carrier 6. In this way, the switching contact can be opened and closed manually using the actuating element 2.
  • the high short circuit current flows through the coil 8.
  • This high short-circuit current is used to open the switching contact by pulling a plunger (not shown) movably mounted in the coil due to the magnetic effect of the coil current into the coil 8.
  • This movement of the ram acts on the moving contact carrier 6, whereby the moving contact 5 moves away from the fixed contact 4.
  • an arc 7 arises, which initially burns between the fixed contact 4 and the moving contact 5. If the moving contact 5 moves away from the fixed contact 4, the increasing arc voltage as the length of the arc 7 increases means that the arc 7 commutates from the moving contact 5 onto a guide rail 15 which is arranged below the opening switching contact.
  • the first end of the guide rail 15 is guided to the lower end of an arc extinguishing device 10.
  • the second end of the guide rail 15 is electrically conductively connected to the output connection 3-2.
  • the arc quenching device 10 has a quenching plate packet 12, which consists of a plurality of quenching plates 13 arranged parallel to one another and which are held at a distance from one another in a stacking direction R by means of a holding device 14. An upper end of the arc extinguishing device 10 is electrically conductively connected to the fixed contact 4.
  • the electro-magnetic forces occurring due to the high short-circuit current interact with the arc 7 in such a way that it is moved away from the opening switching contact.
  • the arc 7 is initially driven in the direction of a so-called prechamber region 16, which is located below the switching contact in front of the arc extinguishing device 10.
  • the arc 7 is then finally pushed into the quenching plate packet 12 of the arc quenching device 10.
  • the arc 7 strikes the quenching plates 13, as a result of which it breaks down into a corresponding plurality of partial arcs electrically connected in series. Due to the resulting higher arc voltage, the arc 7 finally breaks off and goes out.
  • the arc extinguishing device 10 has an extinguishing chamber region 11 in which a predefined number n of extinguishing plates 13 can be arranged in a stacking direction R parallel to one another and at a distance from one another, i.e. can be arranged. Furthermore, the arc extinguishing device 10 has at least one quenching plate packet 12, which is arranged in the quenching chamber region 11 and in turn has a predefined number m of quenching plates 13 arranged parallel to one another, which are held apart from one another in the stacking direction R by means of a holding device 14.
  • FIG. 4 to 9 A non-claimed embodiment of the electromechanical protective switching device 1 with the arc extinguishing device 10 is shown schematically.
  • the electromechanical protective switching device 1 has a preconfigured area which is designed to accommodate a different, ie differently designed, arc extinguishing device 10:
  • the holding device 14 is also formed from an insulating material in order to isolate the individual quenching plates 13 from one another.
  • Figure 4 shows an arc extinguishing device 10 which is arranged in the insulating housing 2 of the protective switching device 1 and has only one quenching plate packet 12 which is formed from only six individual quenching plates 13.
  • This one quenching plate stack 12 is arranged centrally in the quenching chamber region 11, such that either one or more individual quenching plates 13 or also another quenching plate stack 12 can be arranged both above and below.
  • a total of six further quenching plates - individually or packaged - could be arranged in the quenching chamber area 11.
  • the assigned quenching plate package 12 is in the Figures 5 and 6 shown schematically.
  • FIG 7 shows the protective switching device 1 with an arc extinguishing device 10, which two quenching plate packages 12-1 and 12-2 (see detailed representations Figures 6 and 7 ) which are arranged next to one another in the stacking direction R, that is to say they lie one above the other.
  • Both quenching plate packages 12-1 and 12-2 are - similar to that in the Figures 4 to 6 shown quenching plate package - formed from six individual quenching plates 13.
  • the illustrated embodiment is characterized in that two different configurations for the arc extinguishing device 10 are possible with the aid of a single type of quenching plate pack (with a number of six quenching plates per quenching plate pack): those in FIGS Figures 3 to 6 First configuration option shown with a quenching plate package 12, and in the Figures 7 to 9 Second configuration option shown with the two identical quenching plate packages 12-1 and 12-2.
  • This makes it possible to implement different types of devices for different currents, which differ only in terms of their maximum short-circuit switching capacity due to the different number of quenching plates.
  • This variant can be implemented without additional parts or components, which has a cost-reducing effect on storage and logistics costs.
  • FIG. 10 shows the electromechanical protective switching device 1 according to the invention with an arc extinguishing device 10, which is arranged in the insulating housing 2 of the protective switching device 1 and has only one quenching plate package 12, which is formed from only five individual quenching plates 13, which are held apart in the stacking direction R by means of a holding device 14.
  • the corresponding quenching plate stack 12 is in the Figures 11 and 12 shown schematically.
  • Figure 13 shows the electromechanical protective switching device 1 according to the invention with an alternative arc extinguishing device 10, which is likewise arranged in the insulating housing 2 of the protective switching device 1 and has only one quenching plate package 12, which is formed from only seven individual quenching plates 13, which are held apart from one another in the stacking direction R by means of a holding device 14 are.
  • a further configuration for a protective switching device 1 with a medium nominal current strength and a correspondingly medium short-circuit switching capacity can thus be implemented.
  • the corresponding quenching plate stack 12 is in the Figures 14 and 15 schematically shown in a side view and in a perspective view.
  • the two quenching plate packs 12-1 and 12-2 thus have twelve quenching plates 13 which can be secured by means of the receiving elements 17 (see Figures 10 and 13 ) are received and held in the arcing chamber area 11.
  • FIG. 19 shows the electromechanical protective switching device 1 according to the invention with an arc extinguishing device 10, which is arranged in the insulating material housing 2 of the protective switching device 1 and has only one quenching plate packet 12, which is formed from only four individual quenching plates 13, which are held apart from one another in the stacking direction R by means of a holding device 14.
  • This enables a configuration for a protective switching device 1 with an extremely low nominal current strength - and thus with a correspondingly lower maximum short-circuit switching capacity - to be implemented.
  • the corresponding quenching plate stack 12 is in the Figures 20 and 21 shown schematically.
  • Figure 22 shows the electromechanical protective switching device 1 according to the invention with an alternative arc extinguishing device 10, which is likewise arranged in the insulating material housing 2 of the protective switching device 1 and has only one quenching plate package 12, which is formed from only eight individual quenching plates 13, which are held apart from one another in the stacking direction R by means of a holding device 14 are.
  • a further configuration for a protective switching device 1 with a medium nominal current strength and a correspondingly medium short-circuit switching capacity can thus be implemented.
  • the corresponding quenching plate stack 12 is in the Figures 23 and 24 schematically shown in a side view and in a perspective view.
  • FIG 25 shows - corresponding to the representations of Figures 19 and 22 -
  • the first quenching plate stack 12-1 is arranged at the upper end of the quenching chamber region 11 and corresponds to that in FIGS Figures 22 and 24 shown quenching plate packet 12, which is formed from eight individual quenching plates 13, which are held apart from one another in the stacking direction R by means of the holding device 14.
  • the second quenching plate stack 12-2 is arranged below the first quenching plate stack 12-1, and thus at the lower end of the quenching chamber region 11, and corresponds to that in FIGS Figures 19 to 21 shown quenching plate packet 12, which is formed from four individual quenching plates 13, which are held apart from one another in the stacking direction R by means of the holding device 14.
  • which to represent the Figure 25 corresponding detailed representation of the arc extinguishing device 10 with the two quenching plate packs 12-1 and 12-2 is in the Figures 26 and 27 schematically shown in a side view and in a perspective view.
  • the claimed invention is not limited to the arrangements or possible combinations shown in the exemplary embodiments. It is of course also possible to combine the quenching plate packages shown differently than shown in the figures. For example, two of the in Figure 11 or Figure 20 illustrated and described quenching plate packs 12 (each with five or four individual quenching plates) can be combined, the maximum possible number n of quenching plates 13 not being arranged in the quenching chamber region 11.
  • quenching plate packages with a different number m of quenching plates and to combine them with existing or the newly designed quenching plate packages - always provided that the number of quenching plates arranged in the extinguishing chamber area 11, whether individually or to form quenching plate packages - Is less than or equal to the maximum number of extinguishing plates that can be arranged in the extinguishing chamber area 11.
  • the individual quenching plates 13 are cut into a V-shape. This represents a common, since advantageous embodiment. However, it is also possible to use differently designed quenching plates according to the invention.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (5)

  1. Dispositif d'extinction d'arc (10) pour un disjoncteur de protection électromécanique (1), comprenant
    - une région de chambre d'extinction (11), dans laquelle un nombre prédéfini (n) de tôles d'extinction (13) peuvent être disposées de façon écartée l'une de l'autre et parallèlement l'une à l'autre dans une direction d'empilement (R),
    - au moins un empilement de tôles d'extinction (12) qui est disposé dans la région de chambre d'extinction (11) et qui comprend un nombre prédéfini (m) de tôles d'extinction (13) disposées parallèlement l'une à l'autre, qui sont maintenues à distance l'une de l'autre au moyen d'un dispositif de support (14) dans la direction d'empilement (R),
    - dans lequel le nombre (m) de tôles d'extinction (13) formant un empilement de tôles d'extinction (12) est inférieur au nombre (n) de tôles d'extinction pouvant être disposées dans la région de chambre d'extinction (11), de telle manière qu'au moins une autre tôle d'extinction individuelle ou un autre empilement de tôles d'extinction peut être disposé(e) au-dessus et/ou en dessous du au moins un empilement de tôles d'extinction (12),
    caractérisé en ce que le dispositif d'extinction d'arc (10) comprend au moins deux empilements de tôles d'extinction (12) distincts comportant un nombre différent de tôles d'extinction (13), dans lequel les empilements de tôles d'extinction (12) peuvent être disposés de façon alternative ou en commun dans la région de chambre d'extinction (11).
  2. Dispositif d'extinction d'arc (10) selon la revendication 1, caractérisé :
    - en ce que deux empilements de tôles d'extinction (12-1, 12-2) sont disposés dans la région de chambre d'extinction (11) l'un à côté de l'autre dans la direction d'empilement (R), et
    - en ce que le nombre (m1) des tôles d'extinction (13) du premier empilement de tôles d'extinction (12-1) et le nombre (m2) de tôles d'extinction (13) du second empilement de tôles d'extinction (12-2) satisfont à la condition m1 + m2 ≤ n.
  3. Dispositif d'extinction d'arc (10) selon la revendication 1, caractérisé en ce qu'un nombre i > 2 d'empilements de tôles d'extinction (12) sont disposés dans la région de chambre d'extinction (11) l'un à côté de l'autre dans la direction d'empilement (R), qui satisfait à la condition ∑ mi ≤ n.
  4. Disjoncteur de protection électromécanique (1) comprenant :
    - un boîtier en matériau isolant (2), dans lequel les composants du disjoncteur de protection (1) sont logés et sont supportés, et
    - un dispositif d'extinction d'arc (10) selon l'une des revendications 1 à 3,
    caractérisé en ce que le boîtier en matériau isolant (2) comprend une zone préconfigurée pour loger le dispositif d'extinction d'arc (10).
  5. Disjoncteur de protection (1) selon la revendication 4, caractérisé en ce que la région de chambre d'extinction (11) est formée dans le boîtier en matériau isolant (2), dans lequel le boîtier en matériau isolant (2) comprend au moins un élément de réception (17) permettant de loger et supporter le au moins un empilement de tôles d'extinction (12, 12-1, 12-2).
EP17195570.1A 2016-11-29 2017-10-10 Dispositif d'extinction d'un arc électrique et disjoncteur électromécanique Active EP3327742B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016223620.2A DE102016223620A1 (de) 2016-11-29 2016-11-29 Lichtbogenlöschvorrichtung und elektromechanisches Schutzschaltgerät

Publications (2)

Publication Number Publication Date
EP3327742A1 EP3327742A1 (fr) 2018-05-30
EP3327742B1 true EP3327742B1 (fr) 2020-04-29

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Application Number Title Priority Date Filing Date
EP17195570.1A Active EP3327742B1 (fr) 2016-11-29 2017-10-10 Dispositif d'extinction d'un arc électrique et disjoncteur électromécanique

Country Status (3)

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EP (1) EP3327742B1 (fr)
CN (1) CN108122698B (fr)
DE (1) DE102016223620A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3660876B1 (fr) * 2018-11-29 2022-05-11 ABB Schweiz AG Plaque de séparation, chambre d'extinction d'arc et dispositif de commutation

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Publication number Priority date Publication date Assignee Title
DE3042168A1 (de) * 1980-11-08 1982-06-16 Brown, Boveri & Cie Ag, 6800 Mannheim Leitungsschutzschalter
US5504292A (en) * 1994-01-13 1996-04-02 Square D Company Arc stack for a circuit breaker
DE19735522C1 (de) * 1997-08-16 1999-01-28 Kloeckner Moeller Gmbh Halterung für Löschbleche einer Lichtbogenlöscheinrichtung
DE10242310A1 (de) * 2001-11-16 2003-07-10 Abb Patent Gmbh Lichtbogenlöschanordnung für ein elektrisches Schaltgerät
DE102008021025B4 (de) * 2007-04-28 2024-07-18 Abb Ag Lichtbogenlöschblechanordnung und ein Installationsschaltgerät mit solch einer Lichtbogenlöschblechanordnung
CN201655592U (zh) * 2009-05-30 2010-11-24 Abb股份公司 用于电设备开关器的灭弧片装置和设备开关器
DE102011002714B4 (de) 2011-01-14 2021-01-14 Siemens Aktiengesellschaft Schutzschaltgerät
EP2608234A1 (fr) * 2011-12-22 2013-06-26 Eaton Industries GmbH Disjoncteur à courant continu
EP3053177A1 (fr) * 2013-10-29 2016-08-10 Eaton Industries (Austria) GmbH Insert de chambre d'extinction d'arc

Non-Patent Citations (1)

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Title
None *

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Publication number Publication date
CN108122698B (zh) 2020-10-20
DE102016223620A1 (de) 2018-05-30
CN108122698A (zh) 2018-06-05
EP3327742A1 (fr) 2018-05-30

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