EP0335823A1 - Combination of switching apparatuses comprising a low-tension power circuit breaker and a current-limiting switching device - Google Patents

Combination of switching apparatuses comprising a low-tension power circuit breaker and a current-limiting switching device Download PDF

Info

Publication number
EP0335823A1
EP0335823A1 EP89730055A EP89730055A EP0335823A1 EP 0335823 A1 EP0335823 A1 EP 0335823A1 EP 89730055 A EP89730055 A EP 89730055A EP 89730055 A EP89730055 A EP 89730055A EP 0335823 A1 EP0335823 A1 EP 0335823A1
Authority
EP
European Patent Office
Prior art keywords
current
switching device
circuit breaker
limiting
housing
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.)
Withdrawn
Application number
EP89730055A
Other languages
German (de)
French (fr)
Inventor
Karl-Heinz Manthe
Bernhard Dr. Pfeiffer
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 EP0335823A1 publication Critical patent/EP0335823A1/en
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • H01H77/10—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 electrodynamic opening

Definitions

  • the invention relates to a switchgear and controlgear assembly consisting of a low-voltage circuit breaker with a current-limiting contact arrangement and an additional current-limiting switching device that is electrically connected in series with the circuit breaker.
  • a switchgear assembly of this type is known from US-A-4 458 224.
  • the current intensity at which an electrodynamic opening of the contact arrangement of the circuit breaker and the contact arrangement of the current-limiting switching device takes place can be selected to be the same or different. It is essential, however, that the response current of the instantaneous release of the circuit breaker is set lower or at most equal to the response value for the electrodynamic contact opening.
  • the effectiveness of the current-limiting switching device is increased by the invention in that the current-limiting switching device is arranged next to the part of the circuit breaker containing the arc extinguishing device and has a channel for passing the switching gases of the circuit breaker. In this way it is achieved that the switching gases arising in the current-limiting switching device are discharged more quickly than in the known switching device combination mentioned, in which the current-limiting switching device is located at the opposite end of the circuit breaker, namely where the area of the release is located. The switching gases of the circuit breaker and the current-limiting switching device are removed completely independently of one another.
  • the Arrangement according to the invention ensures the flow of the switching gases emerging from the circuit breaker for a gas flow also in the housing of the current-limiting switching device, which causes a faster dissipation of the switching gases generated there. This accelerated removal of the switching gases improves the extinguishing effect of the current-limiting switching device and thus also its switching performance.
  • the arrangement according to the invention also eliminates an additional thermal load on a thermal release due to current heat losses in the current-limiting switching device. This influence requires at least one other adjustment of the thermal release in the known arrangements.
  • the housing of the current-limiting switching device can be designed to be flush with the housing of the circuit breaker.
  • connection devices When installing a current-limiting switching device on a circuit breaker, it is customary to provide connecting pieces on the current-limiting switching device that are suitable in shape and arrangement for direct engagement in the connection devices of the circuit breaker.
  • connection devices Above the connection devices is the outlet opening for the switching gases of the circuit breaker and, according to the embodiment of the invention explained above, the inlet opening in the housing of the current-limiting switching device.
  • the passage openings which are arranged in the housing for a tool provided for operating the connecting devices, can be closed by a cover member. This prevents a pressure loss from occurring when the switching gases pass from the circuit breaker into the current-limiting switching device. At the same time, protection against touching live parts is improved.
  • the channel provided for the passage of the switching gases through the housing of the current-limiting switching device can be formed according to a further embodiment of the invention in that the contact arrangement and the arc-quenching device of the current-limiting switching device are arranged within the associated housing at a distance such that a gas flow essentially can take place without redirection. As a result, the flow losses are kept low.
  • the drive and current rail parts belonging to the current-limiting switching device are enclosed by a hood-like wall part which is shaped to be flow-friendly and which limits the channel within the housing of the current-limiting switching device and that the switching gases of the current-limiting switching device are introduced off the channel.
  • the switching gases of the current-limiting switching device are detected and carried in a manner similar to that of a steam or gas jet pump, without the switching gases used for generating the gas jet of the circuit breaker additionally impinging on the arc extinguishing device of the current-limiting switching device.
  • FIG. 1 shows in a longitudinal section a switchgear and controlgear assembly which consists of a low-voltage circuit breaker in a compact design with an insulating housing and a current-limiting switching device.
  • FIG. 2 shows a top view of the switchgear combination according to FIG. 1, the current-limiting switching device being shown partly in section.
  • the assignment of the view or section planes D, E and F can be seen directly from the comparison with FIG. 1.
  • the switchgear and controlgear assembly 1 shown in FIGS. 1 and 2 consists of a three-pole low-voltage circuit breaker 2 in a compact design with an insulating material housing 3 and also a three-pole current-limiting switching device 4 with its own insulating material housing 5. Both devices are mounted directly adjacent to one another and have the same profile. Therefore, in comparison to the circuit breaker 2, additional space need only be kept free in the longitudinal direction for the switchgear combination 1.
  • the circuit breaker 2 is equipped with a current-limiting contact system.
  • This is a U-shaped fixed contact piece 10 and a contact lever 11 are provided, which can be moved about a hinge pin 12 independently of a drive mechanism designated as a whole by 13 into the open position shown in dashed lines. This happens abruptly when the current forces acting on the contact lever 11 become so high that a compression spring 14 arranged on the back of the contact lever 11 is overcome.
  • the contact lever 11 is provided with a cam 16 against which a rounded cap 15 of a plunger 17 acted upon by the compression spring 14 acts.
  • the normal switching on and off can be carried out manually by means of an actuating handle 20 which actuates a toggle lever mechanism 23 via a drive lever 21 and an over-center spring 22.
  • the toggle lever mechanism is supported on a main pawl 24, which is latched to a locking tab 25 in the position shown in FIG. 1. If the locking tab 25 is released in a known manner by a trigger, the main pawl 24 and thus the toggle lever system 23 loses its support, as a result of which the contact lever 11 automatically reaches its switched-off position.
  • the relative position of the bolt 17 and the nose 16 of the contact lever 11 remains unchanged since these parts are moved together by a switching shaft 18.
  • the drive mechanism 13 is assigned to the middle pole of the circuit breaker 2, in the plane of which the switching device combination is shown in section in FIG. 1.
  • the current-limiting switching device 4 is electrically connected in series with the main current path of the circuit breaker 1.
  • an angled outer end 30 of a busbar 31 is connected to an associated connection device 32 of the circuit breaker 2 for each pole.
  • This opening and the adjacent openings of the two outer poles of the power switches 2 are closed by a closing plate 35 such that the switching gases emerging from an arc chamber 40 of the circuit breaker 2 can only flow via a closing grid 37 and an outlet opening 41 in the direction of the current-limiting switching device 4.
  • the housing 5 has an inlet opening corresponding to the outlet opening 41.
  • the current-limiting switching device 4 contains in its housing 5 a channel 43 extending from the inlet opening 42 for the passage of the arc gases that arise in the arc chamber 40 of the circuit breaker 1 during the extinguishing process.
  • the course of the gas flow is indicated in FIG. 1 by arrows 70, 71, 72 and 73.
  • the flow path of the switching gases emanating from the circuit breaker 2 runs according to the arrows 70 and 71 without any appreciable deflection from the inlet opening 42 to an outlet opening 44 which is arranged at the opposite end of the housing 5 and is covered by a perforated plate 45.
  • An assembly designated as a whole by 46, which comprises switching elements, drive parts and quenching plates, is arranged in the housing 5 to form the channel 43 at a corresponding distance and is also enclosed by a flow-shaped, hood-like wall part 47, around which the circuit breaker 1 starts To oppose gas flow as little resistance as possible.
  • the assembly 46 of the current-limiting switching device 4 has two fixed switching pieces 50 and 51, the switching piece 50 being attached to the busbar 3 already mentioned.
  • the further stationary contact piece 51 is located on another, approximately in the same way as the busbar 31 mirror-symmetrically shaped busbar 52.
  • Movable contact pieces 53 and 54 interacting with these fixed contact pieces are guided on both sides of an insulating partition 55 in a straight line and by a flexible one Current band 56 connected to each other such that they can be moved together as a bridge contact.
  • the position of the parts is shown in dashed lines, which results under the influence of a high, in particular a short-circuit current.
  • the flexible current band 56 expands due to the electrodynamic loop effect and lies against the inner walls of the wall part 47.
  • Each of the two switching points is assigned an arc quenching chamber 57 or 58 formed in a known manner from quenching plates. Both quenching chambers are located near the bottom wall 60 of the housing 5, so that the switching gases emanating from the inside are indicated off the channel 43 in the interior of the housing 5.
  • the housing 5 of the current-limiting switching device 4 comprises three individual pole housings 80, 81 and 82, which each have the same structure, but are provided with separate reference numerals in view of the different drawings.
  • Each of the pole housings consists of two shell-like housing parts 83 and 84, which accommodate the current path parts, connecting devices and the aforementioned channel between them.
  • the pole housing 80 is shown cut in the plane DD corresponding to the right part of FIG. 1.
  • the built-in parts are omitted, so that the shape of the housing parts 83 and 84 is clearly recognizable.
  • the housing part 83 has a projecting wall part which forms the hood-like wall part 47 shown in FIG. 1. Furthermore, the insulating partition 55 is also molded onto the housing part 83. This engages in a groove 85 of the housing part 84, while the hood-like wall part 47 engages in recesses 86 which are formed by projecting wall parts 88. As a result, the wall parts are reliably supported against mechanical forces and the pressure of the switching gases. At the same time this design contributes to the mutual alignment of the housing parts 83 and 84.
  • the pole housing 81 is shown in the sectional plane E-E, specifically with the built-in parts explained with reference to FIG. 1.
  • both legs of the flexible current band 56 can be seen in section, as well as two pairs of coil springs 87, which are provided on both sides of the insulating partition 55.
  • the perforated plate 45 and an external connection device 90 can be seen in section, which can have the same structure as the connection device 32 of the circuit breaker 2.
  • spaces 91 and 92 can be seen, into which the switching gases from the quenching plate stacks 57 and 58 reach, from where they are discharged via the channel 43.
  • the third pole housing 82 is shown in plan view corresponding to the plane F-F shown in FIG. 1.
  • a cover plate 93 can be seen here, which extends over the openings 94 above the connection devices 90.
  • the three adjacent pole housings 80, 81 and 82 can be connected in a suitable manner, for example by connecting pins or bolts which extend through aligned openings 95, which can be arranged in accordance with FIG. 1 in the bottom walls and front walls of the housing parts of the housing 5.
  • the current-limiting switching device 4 is only effective when the switching device combination consisting of the series connection of the circuit breaker 1 and the switching device 4 is subjected to a short-circuit current of a certain level.
  • the contact system of the circuit breaker 1 responds and ignites a switching arc in the quenching chamber 40, as a result of which the flow of switching gases indicated by the arrows 70 and 71 through the channel 43 is brought about.
  • the contacts 50 open, 53 and 51, 54 of the current-limiting switching device 4, whereby switching gases are also released, the flow of which is indicated by the arrows 72 and 73.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

By means of the described arrangement, it is intended to increase the power capability of the current-limiting switching device without changing its dimensions. The current-limiting switching device (4) is subsequently arranged on that part of the power circuit breaker (2) which contains the arc extinguishing device (40). Furthermore, the current-limiting switching device (4) has a channel (43) through which the switching gases (70, 71) of the power circuit breaker (2) are conducted. The switching gases (72, 73) of the current-limiting switching device (4) are introduced off from the channel (43) such that they are acquired and driven along by the gas flow in the channel (43) in the manner of a gas or vapour booster pump. The invention is suitable for low-voltage power circuit breakers of compact construction, with dielectric material housings and a current-limiting additional apparatus of corresponding design. <IMAGE>

Description

Die Erfindung betrifft eine Schaltgerätekombination, bestehend aus einem Niederspannungs-Leistungsschalter mit strombegrenzen­der Kontaktanordnung und einer zusätzlichen mit dem Leistungs­schalter elektrisch in Reihe geschalteten strombegrenzenden Schalteinrichtung.The invention relates to a switchgear and controlgear assembly consisting of a low-voltage circuit breaker with a current-limiting contact arrangement and an additional current-limiting switching device that is electrically connected in series with the circuit breaker.

Eine Schaltgerätekombination dieser Art ist durch die US-A-4 458 224 bekannt geworden. Die Stromstärke, bei der eine elektrodynamische Öffnung der Kontaktanordnung des Leistungs­schalters und der Kontaktanordnung der strombegrenzenden Schalt­einrichtung stattfindet, kann gleich oder unterschiedlich ge­wählt sein. Wesentlich ist jedoch, daß der Ansprechstrom des unverzögerten Auslösers des Leistungsschalters niedriger oder höchstens gleich dem Ansprechwert für die elektrodynamische Kontaktöffnung eingestellt ist.A switchgear assembly of this type is known from US-A-4 458 224. The current intensity at which an electrodynamic opening of the contact arrangement of the circuit breaker and the contact arrangement of the current-limiting switching device takes place can be selected to be the same or different. It is essential, however, that the response current of the instantaneous release of the circuit breaker is set lower or at most equal to the response value for the electrodynamic contact opening.

Durch die Erfindung wird die Wirksamkeit der strombegrenzenden Schalteinrichtung dadurch gesteigert, daß die strombegrenzende Schalteinrichtung anschließend an den die Lichtbogenlöschein­richtung enthaltenden Teil des Leistungsschalters angeordnet ist und einen Kanal zur Durchleitung der Schaltgase des Leistungsschalters aufweist. Auf diese Weise wird erreicht, daß die in der strombegrenzenden Schalteinrichtung entstehenden Schaltgase rascher abgeführt werden als bei der erwähnten bekannten Schaltgerätekombination, bei der sich die strombe­grenzende Schalteinrichtung am gegenuberliegenden Ende des Leistungsschalters befindet, nämlich dort, wo sich der Bereich des Auslösers befindet. Die Abführung der Schaltgase des Leistungsschalters und der strombegrenzenden Schalteinrichtung erfolgen hierbei vollkommen unabhängig voneinander. Bei der Anordnung nach der Erfindung sorgt demgegenüber die Strömung der aus dem Leistungsschalter austretenden Schaltgase für eine Gasströmung auch in dem Gehäuse der strombegrenzenden Schaltein­richtung, die eine raschere Abführung der dort entstehenden Schaltgase bewirkt. Diese beschleunigte Abführung der Schalt­gase verbessert die Löschwirkung der strombegrenzenden Schalt­einrichtung und damit auch deren Schaltleistung. Ebenfalls ent­fällt durch die Anordnung nach der Erfindung eine zusätzliche thermische Belastung eines thermischen Auslösers durch Strom­wärmeverluste der strombegrenzenden Schalteinrichtung. Dieser Einfluß erfordert bei den bekannten Anordnungen mindestens eine andere Justage des thermischen Auslösers.The effectiveness of the current-limiting switching device is increased by the invention in that the current-limiting switching device is arranged next to the part of the circuit breaker containing the arc extinguishing device and has a channel for passing the switching gases of the circuit breaker. In this way it is achieved that the switching gases arising in the current-limiting switching device are discharged more quickly than in the known switching device combination mentioned, in which the current-limiting switching device is located at the opposite end of the circuit breaker, namely where the area of the release is located. The switching gases of the circuit breaker and the current-limiting switching device are removed completely independently of one another. In the Arrangement according to the invention, on the other hand, ensures the flow of the switching gases emerging from the circuit breaker for a gas flow also in the housing of the current-limiting switching device, which causes a faster dissipation of the switching gases generated there. This accelerated removal of the switching gases improves the extinguishing effect of the current-limiting switching device and thus also its switching performance. The arrangement according to the invention also eliminates an additional thermal load on a thermal release due to current heat losses in the current-limiting switching device. This influence requires at least one other adjustment of the thermal release in the known arrangements.

Es ist an sich bekannt, eine strombegrenzende Schalteinrichtung einem kompakten Leistungsschalter mit Isolierstoffgehäuse in der Weise zuzuordnen, daß die Schalteinrichtung der Licht­bogenlöschkammer des Leistungsschalters vorgelagert ist. Da der Leistungsschalter jedoch ein normaler, d. h. nicht strom­begrenzend wirkender Leistungsschalter ist, spricht stets zu­nächst die strombegrenzende Schalteinrichtung an, wenn der Strom auf eine entsprechende Höhe angestiegen ist. Infolge der erst verzögert einsetzenden Kontaktöffnung des Leistungs­schalters kann somit eine Strömung von Schaltgasen in Richtung der strombegrenzenden Schalteinrichtung erst dann einsetzen, wenn diese den Unterbrechungsvorgang im wesentlichen bereits abgeschlossen hat. Zu einer Unterstützung der Gasabführung aus der strombegrenzenden Schalteinrichtung durch die Schalt­gase des Leistungsschalters kann es daher infolge des zeit­lich gestaffelten Ansprechens des Leistungsschalters und der strombegrenzenden Schalteinrichtung nicht kommen.It is known per se to assign a current-limiting switching device to a compact circuit breaker with an insulating housing in such a way that the switching device is arranged upstream of the arc quenching chamber of the circuit breaker. However, since the circuit breaker is a normal, i.e. H. circuit breaker which does not have a current-limiting action, always responds first to the current-limiting switching device when the current has risen to a corresponding level. As a result of the contact opening of the circuit breaker which only begins with a delay, a flow of switching gases in the direction of the current-limiting switching device can only start when the latter has already essentially completed the interruption process. The gas discharge from the current-limiting switching device is not supported by the switching gases of the circuit breaker because of the staggered response of the circuit breaker and the current-limiting switching device.

Wie dies an sich bekannt ist, kann das Gehäuse der strombe­grenzenden Schalteinrichtung an das Gehäuse des Leistungs­schalters bündig anschließend gestaltet sein. In Verbindung hiermit ist es vorteilhaft, an dem Gehäuse der strombegrenzenden Schalteinrichtung eine mit der Austrittsöffnung für Schaltgase des Leistungsschalters korrespondierende Eintrittsöffnung für die Schaltgase vorzusehen. Hierdurch wird ein verlustarmer Übergang der Gasströmung von dem Leistungsschalter zu der strombegrenzenden Schalteinrichtung ermöglicht.As is known per se, the housing of the current-limiting switching device can be designed to be flush with the housing of the circuit breaker. In connection with this, it is advantageous to have on the housing of the current-limiting switching device one with the outlet opening for switching gases of the circuit breaker corresponding entry opening for the switching gases. This enables a low-loss transition of the gas flow from the circuit breaker to the current-limiting switching device.

Beim Anbau einer strombegrenzenden Schalteinrichtung an einen Leistungsschalter ist es üblich, an der strombegrenzenden Schalteinrichtung Anschlußstücke vorzusehen, die nach Form und Anordnung für den direkten Eingriff in die Anschlußvor­richtungen des Leistungsschalters geeignet sind. Oberhalb der Anschlußvorrichtungen befindet sich dabei die Austrittsöffnung für die Schaltgase des Leistungsschalters und entsprechend der vorstehend erläuterten Ausgestaltung der Erfindung die Ein­trittsöffnung im Gehäuse der strombegrenzenden Schalteinrichtung. Gemäß einer Weiterbildung dieser Anordnung können die Durch­trittsöffnungen, die im Gehäuse für ein zur Bedienung der An­schlußvorrichtungen vorgesehenes Werkzeug angeordnet sind, durch ein Abdeckorgan verschließbar sein. Hierdurch wird ver­mieden, daß ein Druckverlust beim Ubertritt der Schaltgase aus dem Leistungsschalter in die strombegrenzende Schalteinrichtung auftritt. Gleichzeitig wird der Schutz vor einer Berührung spannungführender Teile verbessert.When installing a current-limiting switching device on a circuit breaker, it is customary to provide connecting pieces on the current-limiting switching device that are suitable in shape and arrangement for direct engagement in the connection devices of the circuit breaker. Above the connection devices is the outlet opening for the switching gases of the circuit breaker and, according to the embodiment of the invention explained above, the inlet opening in the housing of the current-limiting switching device. According to a further development of this arrangement, the passage openings, which are arranged in the housing for a tool provided for operating the connecting devices, can be closed by a cover member. This prevents a pressure loss from occurring when the switching gases pass from the circuit breaker into the current-limiting switching device. At the same time, protection against touching live parts is improved.

Der für die Durchleitung der Schaltgase durch das Gehäuse der strombegrenzenden Schalteinrichtung vorgesehene Kanal kann nach einer weiteren Ausgestaltung der Erfindung dadurch gebildet sein, daß die Kontaktanordnung und die Lichtbogenlöschein­richtung der strombegrenzenden Schalteinrichtung innerhalb des zugehörigen Gehäuses mit einem Abstand derart angeordnet ist, daß eine Gasströmung im wesentlichen ohne Umlenkung stattfinden kann. Hierdurch werden die Strömungsverluste gering gehalten.The channel provided for the passage of the switching gases through the housing of the current-limiting switching device can be formed according to a further embodiment of the invention in that the contact arrangement and the arc-quenching device of the current-limiting switching device are arranged within the associated housing at a distance such that a gas flow essentially can take place without redirection. As a result, the flow losses are kept low.

Gleichfalls wirkt es sich günstig auf die Strömungsverhältnisse aus, wenn die zu der strombegrenzenden Schalteinrichtung ge­hörenden Antriebs- und Strombahnteile von einer strömungs­günstig geformten haubenartigen Wandteil umschlossen sind, die den Kanal innerhalb des Gehäuses der strombegrenzenden Schalt­einrichtung begrenzt und daß die Einleitung der Schaltgase der strombegrenzenden Schalteinrichtung abseits des Kanals erfolgt. Auf diese Weise werden die Schaltgase der strombegrenzenden Schalteinrichtung in ähnlicher Weise wie bei einer Dampf- oder Gasstrahlpumpe erfaßt und mitgeführt, ohne daß die zur Er­zeugung des Gasstrahls benutzten Schaltgase des Leistungs­schalters die Lichtbogenlöscheinrichtung der strombegrenzenden Schalteinrichtung zusätzlich beaufschlagen.Likewise, it has a favorable effect on the flow conditions if the drive and current rail parts belonging to the current-limiting switching device are enclosed by a hood-like wall part which is shaped to be flow-friendly and which limits the channel within the housing of the current-limiting switching device and that the switching gases of the current-limiting switching device are introduced off the channel. In this way, the switching gases of the current-limiting switching device are detected and carried in a manner similar to that of a steam or gas jet pump, without the switching gases used for generating the gas jet of the circuit breaker additionally impinging on the arc extinguishing device of the current-limiting switching device.

Die Erfindung wird im folgenden anhand des in den Figuren dargestellten Ausführungsbeispieles näher erläutert.The invention is explained below with reference to the embodiment shown in the figures.

Die Figur l zeigt in einem Längsschnitt eine Schaltgerätekom­bination, die aus einem Niederspannungs-Leistungsschalter in kompakter Bauart mit Isolierstoffgehäuse und einer strombe­grenzenden Schalteinrichtung besteht.FIG. 1 shows in a longitudinal section a switchgear and controlgear assembly which consists of a low-voltage circuit breaker in a compact design with an insulating housing and a current-limiting switching device.

In der Figur 2 ist die Schaltgerätekombination gemäß der Figur 1 in der Draufsicht dargestellt, wobei die strombegrenzende Schalteinrichtung teilweise im Schnitt gezeigt ist. Die Zu­ordnung der Ansichts- bzw. Schnittebenen D, E und F ist aus dem Vergleich mit der Figur 1 unmittelbar ersichtlich.FIG. 2 shows a top view of the switchgear combination according to FIG. 1, the current-limiting switching device being shown partly in section. The assignment of the view or section planes D, E and F can be seen directly from the comparison with FIG. 1.

Die in den Figuren 1 und 2 gezeigte Schaltgerätekombination 1 besteht aus einem dreipoligen Niederspannungs-Leistungsschalter 2 in kompakter Bauform mit einem Isolierstoffgehäuse 3 sowie einer ebenfalls dreipoligen strombegrenzenden Schalteinrichtung 4 mit eigenem Isolierstoffgehäuse 5. Beide Geräte sind unmittel­bar aneinandergrenzend montiert und weisen das gleiche Profil auf. Daher braucht für die Schaltgerätekombination 1 im Ver­gleich zu dem Leistungsschalter 2 nur in der Längsrichtung zu­sätzlicher Raum freigehalten zu werden.The switchgear and controlgear assembly 1 shown in FIGS. 1 and 2 consists of a three-pole low-voltage circuit breaker 2 in a compact design with an insulating material housing 3 and also a three-pole current-limiting switching device 4 with its own insulating material housing 5. Both devices are mounted directly adjacent to one another and have the same profile. Therefore, in comparison to the circuit breaker 2, additional space need only be kept free in the longitudinal direction for the switchgear combination 1.

In bekannter Weise ist der Leistungsschalter 2 mit einem strom­begrenzend wirkenden Kontaktsystem ausgerüstet. Hierzu ist ein U-förmig gebogenes feststehendes Schaltstück 10 sowie ein Kon­takthebel 11 vorgesehen, der um einen Gelenkbolzen 12 unab­hängig von einem als Ganzes mit 13 bezeichneten Antriebsmecha­nismus in die gestrichelt gezeigte Öffnungsstellung bewegt werden kann. Dies geschieht sprungartig, wenn die auf den Kon­takthebel 11 wirkenden Stromkräfte so hoch werden, daß eine am Rücken des Kontakthebels 11 angeordnete Druckfeder 14 überwun­den wird. Hierzu ist der Kontakthebel 11 mit einem Nocken 16 versehen, gegen den eine abgerundete Kappe 15 eines durch die Druckfeder l4 beaufschlagten Stößels 17 wirkt.In a known manner, the circuit breaker 2 is equipped with a current-limiting contact system. This is a U-shaped fixed contact piece 10 and a contact lever 11 are provided, which can be moved about a hinge pin 12 independently of a drive mechanism designated as a whole by 13 into the open position shown in dashed lines. This happens abruptly when the current forces acting on the contact lever 11 become so high that a compression spring 14 arranged on the back of the contact lever 11 is overcome. For this purpose, the contact lever 11 is provided with a cam 16 against which a rounded cap 15 of a plunger 17 acted upon by the compression spring 14 acts.

Die normale Ein- und Ausschaltung kann von Hand mittels eines Betätigungshandgriffes 20 vorgenommen werden, der über einen Antriebshebel 21 sowie eine Übertotpunktfeder 22 einen Knie­hebelmechanismus 23 betätigt. Der Kniehebelmechanismus stützt sich dabei an einer Hauptklinke 24 ab, die in der in der Figur 1 gezeigten Stellung an einer Sperrlasche 25 verklinkt ist. Wird die Sperrlasche 25 in bekannter Weise durch einen Aus­löser freigegeben, so verliert die Hauptklinke 24 und damit das Kniehebelsystem 23 seine Abstützung, wodurch der Kontakt­hebel 11 selbsttätig in seiner Ausschaltlage gelangt. Die relative Stellung des Bolzens 17 und der Nase 16 des Kontakt­hebels 11 bleibt dabei unverändert, da diese Teile gemeinsam durch eine Schaltwelle l8 bewegt werden. Der Antriebsmechanis­mus 13 ist dem mittleren Pol des Leistungsschalters 2 zugeord­net, in dessen Ebene die Schaltgerätekombination in der Figur 1 geschnitten gezeigt ist.The normal switching on and off can be carried out manually by means of an actuating handle 20 which actuates a toggle lever mechanism 23 via a drive lever 21 and an over-center spring 22. The toggle lever mechanism is supported on a main pawl 24, which is latched to a locking tab 25 in the position shown in FIG. 1. If the locking tab 25 is released in a known manner by a trigger, the main pawl 24 and thus the toggle lever system 23 loses its support, as a result of which the contact lever 11 automatically reaches its switched-off position. The relative position of the bolt 17 and the nose 16 of the contact lever 11 remains unchanged since these parts are moved together by a switching shaft 18. The drive mechanism 13 is assigned to the middle pole of the circuit breaker 2, in the plane of which the switching device combination is shown in section in FIG. 1.

Die strombegrenzende Schalteinrichtung 4 ist mit der Haupstrom­bahn des Leistungsschalters 1 elektrisch in Reihe geschaltet. Hierzu ist je Pol ein abgewinkeltes äußeres Ende 30 einer Strom­schiene 31 mit einer zugehörigen Anschlußvorrichtung 32 des Leistungsschalters 2 verbunden. Zu einer Klemmschraube 33 der Anschlußvorrichtung 32 besteht Zugang durch eine Öffnung 34 in dem Gehäuse 3 des Leistungsschalters 2. Diese Öffnung und die benachbarten Öffnungen der beiden äußeren Pole des Leistungs­ schalters 2 (vgl. Figur 2) sind durch eine Verschlußplatte 35 derart abgeschlossen, daß die aus einer Lichtbogenkammer 40 des Leistungsschalters 2 austretenden Schaltgase nur über ein Abschlußgitter 37 und eine Austrittsöffnung 41 in Richtung der strombegrenzenden Schalteinrichtung 4 strömen können. Das Ge­häuse 5 besitzt hierzu eine mit der Austrittsöffnung 41 korres­pondierende Eintrittsöffnung.The current-limiting switching device 4 is electrically connected in series with the main current path of the circuit breaker 1. For this purpose, an angled outer end 30 of a busbar 31 is connected to an associated connection device 32 of the circuit breaker 2 for each pole. There is access to a clamping screw 33 of the connection device 32 through an opening 34 in the housing 3 of the circuit breaker 2. This opening and the adjacent openings of the two outer poles of the power switches 2 (see FIG. 2) are closed by a closing plate 35 such that the switching gases emerging from an arc chamber 40 of the circuit breaker 2 can only flow via a closing grid 37 and an outlet opening 41 in the direction of the current-limiting switching device 4. For this purpose, the housing 5 has an inlet opening corresponding to the outlet opening 41.

Die strombegrenzende Schalteinrichtung 4 enthält in ihrem Ge­häuse 5 einen von der Eintrittsöffnung 42 ausgehenden Kanal 43 zur Durchleitung der Lichtbogengase, die bei dem Löschvorgang in der Lichtbogenkammer 40 des Leistungsschalters 1 entstehen. Durch Pfeile 70, 71, 72 und 73 ist in der Figur 1 der Verlauf der Gasströmung angedeutet. Wie man erkennt, verläuft der Strömungsweg der von dem Leistungsschalter 2 ausgehenden Schalt­gase entsprechend den Pfeilen 70 und 71 ohne nennenswerte Um­lenkung von der Eintrittsöffnung 42 zu einer am gegenüber­liegenden Ende des Gehäuses 5 angeordneten Austrittsöffnung 44, die durch eine gelochte Platte 45 abgedeckt ist. Eine als Ganzes mit 46 bezeichnete Baugruppe, die Schaltstücke, Antriebsteile und Löschbleche umfaßt, ist in dem Gehäuse 5 zur Bildung des Kanals 43 mit einem entsprechenden Abstand angeordnet und ist ferner von einem strömungsgünstig geformten haubenartigen Wand­teil 47 umschlossen, um der von dem Leistungsschalter 1 aus­gehenden Gasströmung einen möglichst geringen Widerstand ent­gegenzusetzen.The current-limiting switching device 4 contains in its housing 5 a channel 43 extending from the inlet opening 42 for the passage of the arc gases that arise in the arc chamber 40 of the circuit breaker 1 during the extinguishing process. The course of the gas flow is indicated in FIG. 1 by arrows 70, 71, 72 and 73. As can be seen, the flow path of the switching gases emanating from the circuit breaker 2 runs according to the arrows 70 and 71 without any appreciable deflection from the inlet opening 42 to an outlet opening 44 which is arranged at the opposite end of the housing 5 and is covered by a perforated plate 45. An assembly, designated as a whole by 46, which comprises switching elements, drive parts and quenching plates, is arranged in the housing 5 to form the channel 43 at a corresponding distance and is also enclosed by a flow-shaped, hood-like wall part 47, around which the circuit breaker 1 starts To oppose gas flow as little resistance as possible.

Die Baugruppe 46 der strombegrenzenden Schalteinrichtung 4 weist zwei feststehende Schaltstücke 50 und 51 auf, wobei das Schaltstück 50 an der bereits erwähnten Stromschiene 3 ange­bracht ist. Das weitere ortsfeste Schaltstück 51 befindet sich an einer weiteren, etwa in gleicher Weise wie die Stromschiene 31 spiegelsymmetrisch geformten Stromschiene 52. Mit diesen ortsfesten Schaltstücken zusammenwirkende bewegbare Schalt­stücke 53 und 54 sind beiderseits einer isolierenden Trennwand 55 geradlinig verschiebbar geführt und durch ein biegsames Stromband 56 miteinander derart verbunden, daß sie als Brücken­schaltstück gemeinsam bewegbar sind. Gestrichelt ist die Lage der Teile gezeigt, die sich unter dem Einfluß eines hohen, insbesondere eines Kurzschlußstromes ergibt. Das biegsame Stromband 56 weitet sich aufgrund der elektrodynamischen Schleifenwirkung aus und legt sich gegen die Innenwände des Wandteiles 47. Aufgrund der Verformung werden die bewegbaren Schaltstücke 53 und 54 von den ortsfesten Schaltstücken 50 und 51 schlagartig abgehoben. Jeder der beiden Schaltstellen ist eine in bekannter Weise aus Löschblechen gebildete Lichtbogen­löschkammer 57 bzw. 58 zugeordnet. Beide Löschkammern befinden sich nahe der Bodenwand 60 des Gehäuses 5, so daß die von innen ausgehenden Schaltgase abseits des Kanals 43 in den Innenraum des Gehäuses 5 angegeben werden.The assembly 46 of the current-limiting switching device 4 has two fixed switching pieces 50 and 51, the switching piece 50 being attached to the busbar 3 already mentioned. The further stationary contact piece 51 is located on another, approximately in the same way as the busbar 31 mirror-symmetrically shaped busbar 52. Movable contact pieces 53 and 54 interacting with these fixed contact pieces are guided on both sides of an insulating partition 55 in a straight line and by a flexible one Current band 56 connected to each other such that they can be moved together as a bridge contact. The position of the parts is shown in dashed lines, which results under the influence of a high, in particular a short-circuit current. The flexible current band 56 expands due to the electrodynamic loop effect and lies against the inner walls of the wall part 47. Because of the deformation, the movable contact pieces 53 and 54 are suddenly lifted off the fixed contact pieces 50 and 51. Each of the two switching points is assigned an arc quenching chamber 57 or 58 formed in a known manner from quenching plates. Both quenching chambers are located near the bottom wall 60 of the housing 5, so that the switching gases emanating from the inside are indicated off the channel 43 in the interior of the housing 5.

Weitere Einzelheiten der strombegrenzenden Schalteinrichtung 4 sind aus dem rechten Teil der Figur 2 zu entnehmen. Zunächst ist zu erkennen, daß das Gehäuse 5 der strombegrenzenden Schalt­einrichtung 4 drei einzelne Polgehäuse 80, 81 und 82 umfaßt, die jeweils den gleichen Aufbau besitzen, mit Rücksicht auf die unterschiedliche zeichnerische Darstellung jedoch mit ge­sonderten Bezugzeichen versehen sind. Jedes des Polgehäuse besteht aus zwei schalenartigen Gehäuseteilen 83 und 84, die zwischen sich die Strombahnteile, Anschlußvorrichtungen sowie den erwähnten Kanal aufnehmen. Das Polgehäuse 80 ist in der Ebene D-D entsprechend dem rechten Teil der Figur 1 geschnitten gezeigt. Hierbei sind die Einbauteile fortgelassen, so daß die Gestalt der Gehäuseteile 83 und 84 deutlich erkennbar ist. Das Gehäuseteil 83 besitzt ein vorspringendes Wandteil, welches das in der Figur 1 gezeigte haubenartige Wandteil 47 bildet. Ferner ist die isolierende Trennwand 55 gleichfalls an den Gehäuseteil 83 angeformt. Diese greift in eine Nut 85 des Gehäuseteiles 84 ein, während das haubenartige Wandteil 47 in Rücksprünge 86 ein­greift, die durch vorspringende Wandteile 88 gebildet sind. Hierdurch werden die Wandteile gegenüber mechanischen Kräften und dem Druck der Schaltgase zuverlässig abgestützt. Zugleich trägt diese Gestaltung zur gegenseitigen Ausrichtung der Ge­häuseteile 83 und 84 bei.Further details of the current-limiting switching device 4 can be found in the right part of FIG. 2. First of all, it can be seen that the housing 5 of the current-limiting switching device 4 comprises three individual pole housings 80, 81 and 82, which each have the same structure, but are provided with separate reference numerals in view of the different drawings. Each of the pole housings consists of two shell-like housing parts 83 and 84, which accommodate the current path parts, connecting devices and the aforementioned channel between them. The pole housing 80 is shown cut in the plane DD corresponding to the right part of FIG. 1. Here, the built-in parts are omitted, so that the shape of the housing parts 83 and 84 is clearly recognizable. The housing part 83 has a projecting wall part which forms the hood-like wall part 47 shown in FIG. 1. Furthermore, the insulating partition 55 is also molded onto the housing part 83. This engages in a groove 85 of the housing part 84, while the hood-like wall part 47 engages in recesses 86 which are formed by projecting wall parts 88. As a result, the wall parts are reliably supported against mechanical forces and the pressure of the switching gases. At the same time this design contributes to the mutual alignment of the housing parts 83 and 84.

Das Polgehäuse 81 ist in der Schnittebene E-E gezeigt, und zwar mit den anhand der Figur 1 erläuterten Einbauteilen. Von diesen sind im Schnitt beide Schenkel des biegsamen Strombandes 56 er­kennbar sowie zwei Paare von Schraubenfedern 87, die beiseitig der isolierenden Trennwand 55 vorgesehen sind. Ferner ist im Schnitt die Lochplatte 45 und eine äußere Anschlußvorrichtung 90 erkennbar, die den gleichen Aufbau wie die Anschlußvor­richtung 32 des Leistungsschalters 2 besitzen kann. Beidseitig der geschnittenen Schenkel des haubenartigen Wandteiles 47 sind Räume 91 und 92 erkennbar, in welche die Schaltgase aus den Löschblechstapeln 57 und 58 gelangen, von wo sie über den Kanal 43 abgeführt werden.The pole housing 81 is shown in the sectional plane E-E, specifically with the built-in parts explained with reference to FIG. 1. Of these, both legs of the flexible current band 56 can be seen in section, as well as two pairs of coil springs 87, which are provided on both sides of the insulating partition 55. Furthermore, the perforated plate 45 and an external connection device 90 can be seen in section, which can have the same structure as the connection device 32 of the circuit breaker 2. On both sides of the cut legs of the hood-like wall part 47, spaces 91 and 92 can be seen, into which the switching gases from the quenching plate stacks 57 and 58 reach, from where they are discharged via the channel 43.

Das dritte Polgehäuse 82 ist entsprechend der in der Figur 1 eingezeichneten Ebene F-F in der Draufsicht gezeigt. Erkennbar sind hierbei eine Abdeckplatte 93, die sich über die Öffnungen 94 oberhalb der Anschlußvorrichtungen 90 erstreckt. Die drei benachbarten Polgehäuse 80, 81 und 82 können in geeigneter Weise, verbunden sein, beispielsweise durch Verbindungsstifte oder Bolzen, die sich durch fluchtende Öffnungen 95 erstrecken, die entsprechend der Figur 1 in den Bodenwänden und Frontwänden der Gehäuseteile des Gehäuses 5 angeordnet sein können.The third pole housing 82 is shown in plan view corresponding to the plane F-F shown in FIG. 1. A cover plate 93 can be seen here, which extends over the openings 94 above the connection devices 90. The three adjacent pole housings 80, 81 and 82 can be connected in a suitable manner, for example by connecting pins or bolts which extend through aligned openings 95, which can be arranged in accordance with FIG. 1 in the bottom walls and front walls of the housing parts of the housing 5.

Aufgrund ihrer Bemessung ist die strombegrenzende Schaltein­richtung 4 nur dann wirksam, wenn der durch die aus der Reihen­schaltung von Leistungsschalter 1 und Schalteinrichtung 4 be­stehende Schaltgerätekombination mit einem Kurzschlußstrom bestimmter Höhe beaufschlagt ist. Hierbei spricht zunächst das Kontaktsystem des Leistungsschalters 1 an und zündet einen Schaltlichtbogen in der Löschkammer 40, wodurch die mit den Pfeilen 70 und 71 angedeutete Strömung von Schaltgasen durch den Kanal 43 bewirkt wird. Gleichzeitig oder aufgrund ent­sprechender Bemessung verzögert öffnen sich die Kontakte 50, 53 sowie 51, 54 der strombegrenzenden Schalteinrichtung 4, wo­durch gleichfalls Schaltgase freigesetzt werden, deren Strömung mit den Pfeilen 72 und 73 kenntlich gemacht ist. Diese Schalt­gase werden von der Gasströmung entsprechend den Pfeilen 70 und 71 nach Art einer Gas- oder Dampfstrahlpumpe erfaßt und be­deutend rascher aus dem Gehäuse 5 abgeführt, als dies bei her­kömmlicher Anordnung der strombegrenzenden Schalteinrichtung 4 am anderen Ende des Leistungsschalters 2 der Fall wäre. Auf diese Weise wird bei gleichem Volumen der strombegrenzenden Schalteinrichtung 4 ein verbessertes Schaltvermögen erzielt.Because of its dimensioning, the current-limiting switching device 4 is only effective when the switching device combination consisting of the series connection of the circuit breaker 1 and the switching device 4 is subjected to a short-circuit current of a certain level. First, the contact system of the circuit breaker 1 responds and ignites a switching arc in the quenching chamber 40, as a result of which the flow of switching gases indicated by the arrows 70 and 71 through the channel 43 is brought about. At the same time or delayed due to appropriate dimensioning, the contacts 50 open, 53 and 51, 54 of the current-limiting switching device 4, whereby switching gases are also released, the flow of which is indicated by the arrows 72 and 73. These switching gases are detected by the gas flow according to the arrows 70 and 71 in the manner of a gas or steam jet pump and discharged from the housing 5 significantly faster than would be the case with a conventional arrangement of the current-limiting switching device 4 at the other end of the circuit breaker 2. In this way, an improved switching capacity is achieved with the same volume of the current-limiting switching device 4.

Claims (5)

1. Schaltgerätekombination (1), bestehend aus einem Nieder­spannungs-Leistungsschalter (2) mit strombegrenzender Kontakt­anordnung (11) und einer zusätzlichen mit dem Leistungsschalter (2) elektrisch in Reihen geschalteten strombegrenzenden Schalt­einrichtung (4) , dadurch gekennzeichnet, daß die strombegrenzende Schalteinrichtung (4) anschließend an den die Lichtbogen­löscheinrichtung (40) enthaltenden Teil des Leistungsschalters (2) angeordnet ist und einen Kanal (43) zur Durchleitung der Lichtbogengase (70, 71) des Leistungsschalters (2) aufweist.1. Switchgear combination (1), consisting of a low-voltage circuit breaker (2) with a current-limiting contact arrangement (11) and an additional with the circuit breaker (2) electrically connected in series current-limiting switching device (4), characterized in that the current-limiting switching device (4 ) is then arranged on the part of the circuit breaker (2) containing the arc quenching device (40) and has a channel (43) for the passage of the arc gases (70, 71) of the circuit breaker (2). 2. Schaltgerätekombination nach Anspruch 1, dadurch gekennzeichnet, daß das Gehäuse (5) der strombegrenzenden Schalteinrichtung (4) an das Gehäuse (3) des Leistungsschalters (2) bündig anschließend gestaltet ist und eine mit der Austrittsöffnung (41) für Schaltgase des Leistungsschalters (2) korrespondierende Eintrittsöffnung (42) für die Schaltgase besitzt.2. Switchgear and controlgear assembly according to claim 1, characterized in that the housing (5) of the current-limiting switching device (4) on the housing (3) of the circuit breaker (2) is then designed flush and one with the outlet opening (41) for switching gases of the circuit breaker ( 2) has a corresponding inlet opening (42) for the switching gases. 3. Schaltgerätekombination nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß für die Bedienung von zwischen dem Leistungsschalter (2) und der strombegrenzenden Schalteinrichtung (4) angeordneten An­schlußvorrichtungen (32) vorgesehene Durchtrittsöffnungen (34) des Gehäuses (3) des Leistungsschalters (2) durch ein Abdeck­organ (35) verschließbar sind.3. Switchgear assembly according to claim 1 or 2, characterized in that for the operation of between the circuit breaker (2) and the current-limiting switching device (4) arranged connection devices (32) provided through openings (34) of the housing (3) of the circuit breaker (2) can be closed by a cover member (35). 4. Schaltgerätekombination nach einem der vorangehenden An­sprüche, dadurch gekennzeichnet, daß die Kontaktanordnung (46) und die Lichtbogenlöschein­richtung (57, 58) der strombegrenzenden Schalteinrichtung (4) innerhalb des zugehörigen Gehäuses (5) mit einem Abstand derart angeordnet ist, daß eine Gasströmung (70, 71) im wesentlichen ohne Umlenkung stattfinden kann.4. Switchgear and controlgear assembly according to one of the preceding claims, characterized in that the contact arrangement (46) and the arc quenching device (57, 58) of the current-limiting switching device (4) is arranged within the associated housing (5) at a distance such that a gas flow ( 70, 71) can take place essentially without deflection. 5. Schaltgerätekombination nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß zu der Kontaktanordnung (46) der strombegrenzenden Schalteinrichtung (4) gehörende Antriebs- und Strombahnteile (53, 54, 56) von einem strömungsgünstig geformten haubenartigen Wandteil (47) umschlossen sind, die den Kanal (43) innerhalb des Gehäuses (5) der strombegrenzenden Schalteinrichtung (4) begrenzt und daß die Einleitung der Schaltgase (72, 73) der strombegrenzenden Schalteinrichtung (4) abseits des Kanals (43) erfolgt.5. Switchgear assembly according to one of the preceding claims, characterized in that to the contact arrangement (46) of the current-limiting switching device (4) belonging drive and current path parts (53, 54, 56) are enclosed by a streamlined hood-shaped wall part (47) which limits the channel (43) within the housing (5) of the current-limiting switching device (4) and that the switching gases (72, 73) of the current-limiting switching device (4) are introduced away from the channel (43).
EP89730055A 1988-03-28 1989-03-01 Combination of switching apparatuses comprising a low-tension power circuit breaker and a current-limiting switching device Withdrawn EP0335823A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883810978 DE3810978A1 (en) 1988-03-28 1988-03-28 SWITCHING DEVICE COMBINATION OF LOW-VOLTAGE CIRCUIT BREAKER AND CURRENT-LIMITING SWITCHING DEVICE
DE3810978 1988-03-28

Publications (1)

Publication Number Publication Date
EP0335823A1 true EP0335823A1 (en) 1989-10-04

Family

ID=6351150

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89730055A Withdrawn EP0335823A1 (en) 1988-03-28 1989-03-01 Combination of switching apparatuses comprising a low-tension power circuit breaker and a current-limiting switching device

Country Status (2)

Country Link
EP (1) EP0335823A1 (en)
DE (1) DE3810978A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2704352A1 (en) * 1993-04-20 1994-10-28 Merlin Gerin Plug-in circuit breaker with offset plug-in socket fixing plane
FR2811136A1 (en) * 2000-07-03 2002-01-04 Schneider Electric Ind Sa MODULE ASSOCIATED WITH AN ELECTROMAGNETIC SWITCHING APPARATUS
WO2011098903A1 (en) * 2010-02-11 2011-08-18 Eaton Corporation Limiter including a number of gas channels and electrical switching apparatus employing the same
DE102011086308A1 (en) 2011-11-14 2013-05-16 Siemens Aktiengesellschaft Multi-pole electrical switch

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3136921A (en) * 1957-12-10 1964-06-09 Westinghouse Electric Corp Circuit breakers
EP0102867A1 (en) * 1982-08-06 1984-03-14 Telemecanique Modular current limiting means
EP0212197A2 (en) * 1985-07-30 1987-03-04 Westinghouse Electric Corporation Circuit breaker with arc gas vent baffle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3136921A (en) * 1957-12-10 1964-06-09 Westinghouse Electric Corp Circuit breakers
EP0102867A1 (en) * 1982-08-06 1984-03-14 Telemecanique Modular current limiting means
EP0212197A2 (en) * 1985-07-30 1987-03-04 Westinghouse Electric Corporation Circuit breaker with arc gas vent baffle

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2704352A1 (en) * 1993-04-20 1994-10-28 Merlin Gerin Plug-in circuit breaker with offset plug-in socket fixing plane
FR2811136A1 (en) * 2000-07-03 2002-01-04 Schneider Electric Ind Sa MODULE ASSOCIATED WITH AN ELECTROMAGNETIC SWITCHING APPARATUS
US6515850B2 (en) 2000-07-03 2003-02-04 Schneider Electric Industries Sa Module combined with an electromagnetic switch appliance
DE10131926B4 (en) * 2000-07-03 2010-06-17 Schneider Electric Industries S.A. Control module for three-phase motors
WO2011098903A1 (en) * 2010-02-11 2011-08-18 Eaton Corporation Limiter including a number of gas channels and electrical switching apparatus employing the same
DE102011086308A1 (en) 2011-11-14 2013-05-16 Siemens Aktiengesellschaft Multi-pole electrical switch
US9000870B2 (en) 2011-11-14 2015-04-07 Siemens Aktiengesellschaft Multipolar electrical switch
DE102011086308B4 (en) 2011-11-14 2022-03-17 Siemens Aktiengesellschaft Multi-pole electrical switch

Also Published As

Publication number Publication date
DE3810978A1 (en) 1989-10-12

Similar Documents

Publication Publication Date Title
DE2808602A1 (en) SWITCHING DEVICE WITH ANTIPREL LOCKING
EP0309386B1 (en) Multi-pole low-voltage circuit breaker with an insulating case and an arc quencher
EP0752153A1 (en) Arc quenching chamber with three barriers for the passage of arc gasses
DE2158749B2 (en) CIRCUIT BREAKER
EP0039096A2 (en) Puffer type gas-blast circuit interrupter
WO1984001663A1 (en) Electric safety switch for apparatus
DE3840940C2 (en)
EP1301935B1 (en) Arc extinguisher with an attachment for low voltage switchgear
EP0049209B1 (en) Protective switch of compact construction with a tripping pin
EP0335823A1 (en) Combination of switching apparatuses comprising a low-tension power circuit breaker and a current-limiting switching device
DE939460C (en) Electric switch
EP0959483B1 (en) Load break switch with arc extinguishing chamber
EP0744759A1 (en) H.T. circuit breaker with a fixed heating chamber
EP0617836A1 (en) Automatic cutout with an arc extinguishing chamber.
DE2811510C2 (en) Electric pressure gas switch
DE717219C (en) Installation auto switch
DE2828773C2 (en) Auto-pneumatic pressure gas switch
DE3443122A1 (en) DEVICE FOR INTERRUPTING CIRCUITS
DE102005007303B4 (en) Electrical installation device with arc prechamber space, arc guide rails and current limiting arc quenching device
EP0290950A1 (en) Pressurized-gas circuit breaker
DE69836900T2 (en) Circuit breaker with coverable housing for additional devices and accessories with locking and pull tab
DE3810977C2 (en) Current-limiting switching device with electrodynamically opening switching elements
EP0164632B1 (en) Arc extinguishing device
EP0028012A1 (en) Low-tension circuit breaker
DE3729741C2 (en) Multipole circuit breaker

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE FR IT SE

17P Request for examination filed

Effective date: 19891026

17Q First examination report despatched

Effective date: 19920219

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19920602