EP3349230A1 - Arc extinguishing chamber for a protective switch and a protective switch for extinguishing arcing - Google Patents

Abstract

The present invention relates to a quenching chamber for a contactor, wherein the quenching chamber comprises at least one contact point with a fixed contact, at least one quenching device, and a blowing device for generating a magnetic blowing field, which blows arcs in the quenching device. The blowing device has at least one permanent magnet arranged adjacent to the contact point for generating a permanent magnetic blowing field and / or at least one coil arranged adjacent to the contact point for generating an electromagnetic blowing field, so that an arc arising when the contact point is opened is blown into the at least one extinguishing device. At least two magnetically conductive pole plates are arranged with intermediate storage of the permanent magnet and / or the coil parallel to each other, so that the blowing effect is amplified by magnetic fields for guiding the arcs. According to the invention it is provided that at least one of the pole plates is designed as a pivotable latch, by means of which the extinguishing chamber in an unlocked state of a base part of a contactor is detachably connected and positively connected in a locked state with the base part of the contactor.

Description

The invention relates to a quenching chamber for extinguishing arcs for a contactor with a quenching device, a blowing device which blows arcs in the quenching device, and a plurality of lamellar arc-extinguishing elements, between which flow channels are formed.

Contactors with such extinguishing chambers are used, for example, in railway operation for switching loads and for interrupting circuits with high currents and high voltages. In the switching operation, i. When opening contact points, an arc is created at the contact points. Through this arc, the current flow between contacts is maintained. In addition, the arc releases a large amount of heat, which leads to the burning of the contacts and thus can reduce the life of the contactor. In addition, the entire area affected by the influence of the arc is subjected to very high thermal loads. Therefore, a quenching chamber is used, leading to a rapid collapse of the arc.

In particular, it should be prevented for AC and DC operation that electrically conductive plasma collects in the extinguishing device, resulting in unfavorable switching behavior of the contactor. Thus, the plasma is blown with the arcs through the blowing device in the direction of the extinguishing device and the plasma released via flow channels into the environment.

In the known quenching chamber, the flow channels are parallel to each other and identical, so that the exiting plasma collects in the area at the outlet openings of the flow channels, and can lead to the thermal load of the quenching chamber and possibly to risk of arc leakage from the quenching chamber.

It is therefore an object of the present invention to provide a quenching chamber for a contactor, which has a long life and ensures increased safety.

For this purpose, the invention provides that the flow channels each have a scattering section, wherein the scattering sections of adjacent flow channels are formed differently inclined, so that the plasma occurring is deflected by the flow channels in different directions. As a result of the scattering of the exiting plasma, in particular the average temperature at the ends of the flow channels facing away from the contact region is markedly reduced, so that a plasma concentration is prevented and the thermal load is reduced.

The extinguishing device may in particular comprise one or more arc guide plates, which guide the arc of contact points in the extinguishing device when opening the contactor. Preferably, two arc guide plates are arranged, which form a V-shape. Preferably, at least one contact point is arranged with a fixed contact in the quenching chamber. The blowing device preferably generates a magnetic blowing field which blows arcs into the extinguishing device. This is preferably achieved in that the blowing device has at least one adjacent to the contact point arranged permanent magnet for generating a permanent magnetic blowing field and / or at least one adjacent to the contact point arranged coil for generating an electromagnetic blow field. The blower field can also be reinforced by magnetically conductive pole plates, which are preferably arranged in pairs parallel to each other with intermediate storage of the extinguishing device. Preferably, the contact point is also arranged between the pole plates, so that in the region around the contact point, namely the switching region substantially a homogeneous magnetic blown field is formed. The fixed contact and / or the Lichtleitleitbech are preferably arranged such that resulting arcs are aligned substantially perpendicular to the magnetic Blasfeld, so that the acting Lorenzkraft is maximized. Preferably, the flow channels are aligned substantially in the blowing direction, so that resulting plasma can be blown into the flow channels with a low resistance.

Furthermore, the quenching chamber can be integrally integrated into the contactor or formed as a removable part of the contactor.

According to a second aspect of the present invention, the flow channels extend in opposite directions. In this case, some scattering sections preferably extend at an angle inclined to the blowing direction, while other scattering sections extend at the same angle, but in an opposite direction and inclined on the same plane to the blowing direction. This arrangement is particularly advantageous when a plurality of elongated extinguishing chambers are arranged side by side, wherein the plasma exits each of the extinguishing chambers in their transverse direction. Since a plurality of juxtaposed extinguishing chambers and thus several contactors are usually not opened at the same time, the space is optimally used for cooling via the scattering sections of different extinguishing chambers.

According to a third aspect of the present invention, the extinguishing device has a plurality of arc extinguishing elements, which are arranged next to each other, so that at least one flow channel is formed between two adjacent arc extinguishing elements. Preferably, a flow channel is formed in each case between all adjacent arc-extinguishing elements. The arc-extinguishing elements may preferably be formed of ceramic, so that they can each be exposed to the outside with one of their ends. Thus, the arc extinguishing elements need not be protected to the outside by an additional electrically insulating cover, so that the cooling of the arc extinguishing elements is further improved. The flow channels may, but need not, each comprise an extinguishing section, which is arranged upstream in the blowing direction and forms part of the extinguishing device.

According to a fourth aspect of the present invention and to save costs, the arc extinguishing elements are formed identically, each two successive arc extinguishing elements are mounted rotated by 180 degrees to each other, the arc extinguishing elements each at least a first air deflecting recess on a first side surface and at least a second air deflecting recess having the first side surface opposite, the second side surface. In this case, the first and the second recesses are inclined and matched to one another in such a way that the first recesses each form a scattering section with the adjacent second recesses, wherein the scattering sections in each case deflect the air differently.

According to a fifth aspect of the present invention, the flow channels each have a cross-sectional change that separates the erase portion from the spreader portion. Thus, the plasma is prevented from leaving the quenching chamber at too high a rate without being cooled by the spreader portion.

According to a secondary aspect, the invention further relates to a fire extinguishing chamber for a contactor, wherein the extinguishing chamber comprises at least one contact point with a fixed contact, at least one extinguishing device, and a blowing device for generating a magnetic blow field, which blows arcs in the extinguishing device, wherein the blowing device at least one arranged adjacent to the contact point permanent magnets for generating a permanent magnetic blower field and / or at least one adjacent to the contact point arranged coil for generating an electromagnetic blower field, so that a resulting when opening the contact point arc is blown into the, at least one, extinguishing device, wherein at least two magnetically conductive pole plates with the intermediate storage of the permanent magnet and / or the coil are arranged parallel to each other, so that the blowing effect by magnetic fields for guiding the arcs in the v area is reached.

Such a quenching chamber is known from the prior art, for example from the EP 2 230 678 A2 known. A quenching chamber contains wearing parts, which must be checked frequently and replaced if necessary. Furthermore, such a quenching chamber with a permanent magnet and / or a coil is very heavy and thus must be mechanically connected to a base part.

It is therefore an object of the present invention to provide a quenching chamber, which is easily removable and at the same time against the base part of a contactor is well fastened.

The problem is solved in that at least one of the pole plates is designed as a pivotable latch, by means of which the quenching chamber in an unlocked state of a base part of a contactor is detachably and positively connected in a locked state with the base part of the contactor. Preferably, the pivotable pole plate has on the side facing the base part a hook or a projection, while the base part has a corresponding pin or a recess. In particular, the quenching chamber can have an insulating housing, wherein the pole plate is arranged outside the housing, so that the pole plate is magnetically but not electrically coupled to the current-carrying parts in the housing. Due to the size and stability of the pole plates, the strength of the lock is guaranteed without additional parts.

According to a seventh aspect of the present invention, a locking lever is eccentrically pivotally connected to the pivotable pole plate and held by a holder such that pivotal movement of the pole plate results in a translational movement of the locking lever. In this case, the pivot axis of the pole plate is spaced from the pivot axis of the locking lever, and thus provided eccentrically.

According to an eighth aspect of the present invention, the lock lever is pivotally connected at one end to the pole plate and held at the opposite, free end by the holder, which includes a movable safety latch, which in the locked state of the pole plate by a spring element into a locked position is pressed over the free end, so that the translational movement of the locking lever and thus also the pivoting movement of the pole plate is prevented by the safety lock. The holder may preferably be formed integrally on a housing half and with this. The free end is preferably the end facing away from the blowing device, so that the movable safety lock is easily accessible from the side facing away from the base part of the quenching chamber.

According to a ninth aspect of the present invention, a display element attached to the lock lever is visible in the unlocked state and is not visible in the locked state. Preferably, the free end of the locking lever is marked in accordance with color, which is covered in a locked state due to the movable safety lock and thus not visible.

According to a tenth aspect of the present invention, the pivotal movement of the pivotable pole plate in both directions is limited by a stopper surface. This will ensure that the pivotable pole plate does not undesirably come in contact with other parts during assembly or inspection.

According to an eleventh aspect of the present invention, the blowing device comprises both at least one coil having a pivotable first pole plate and at least one permanent magnet having a torsion-resistant second pole plate, wherein the first and second pole plates are separated from each other by an intermediate gap and mounted on a plane are,. Preferably, the pole plates are arranged in pairs in such a way that the coil between two pivotable pole plates and the permanent magnet between two torsion-resistant pole plates are arranged.

According to a twelfth aspect of the present invention, a stopper surface is formed by the housing of the quenching chamber.

According to another ancillary aspect of the present invention, the invention further relates to a fire extinguishing chamber for a contactor comprising at least one contact point with a fixed contact, a quenching device, and a blowing device, which blows arcs in the erasing device.

At the time of filing, there is a prejudice of the skilled artisan that mechanical contactors, in contrast to semiconductor contactors, do not require a heat dissipating heat sink. The thermal situation of mechanical contactors is usually kept in a frame by e.g. low limit powers are specified or contact plates are oversized. However, the inventors have surprisingly found that a higher effective power of a contactor can be achieved without great effort, that a heat sink is attached to the previously known quenching chamber, which is thermally conductively connected to the fixed contact. The fixed contact may in particular be sheet-shaped and thus have a large contact area in the switching area in the vicinity of the contact point. Thus, a cooling of the switching range can be achieved particularly efficient by the heat sink.

According to a fourteenth aspect of the present invention, the extinguishing chamber further comprises an electrically insulating housing, wherein the fixed contact passes through the housing and thus forms an electrical connection to which the heat sink is mounted.

According to a further independent aspect of the present invention, the invention further relates to a quenching chamber for a contactor comprising at least one contact point with a fixed contact, a quenching device with an arc guide plate, wherein an air gap is provided in the vicinity of the contact point between the arc guide plate and the fixed contact, and a Blowing device for generating a magnetic blowing field, which blows arcs in the erasing device, wherein the blowing device at least one adjacent to the contact point permanent magnet arranged to produce a permanent magnetic blowing field and / or at least one adjacent arranged to contact point coil for generating an electromagnetic blower field, so that an emerging when opening the contact point arc is blown into at least one extinguishing device, wherein a protective lining between the air gap and the permanent magnet and / or the coil is arranged and from the fixed contact to the Arc guide extends towards.

Such a quenching chamber is for example from the EP 2 230 678 A2 known. There, a protective cover is disclosed, which is glued to the housing.

It is therefore also an object of the invention to provide a quenching chamber, wherein the protective cover is securely attached and easily replaceable.

The problem is solved in that the protective covering is arranged in the direction of the extinguishing device inserted and thus also interchangeable. In particular, the protective cover is preferably under the arc guide from below, in the direction of the extinguishing device, be inserted.

According to a sixteenth aspect of the present invention, the protective cover is attached via a groove or projection, which groove or projection extends perpendicular to the surfaces of the fixed contact. The quenching chamber may further comprise a housing which has for receiving the permanent magnet or the coil inner boundary walls which are provided perpendicular to the side walls of the housing. Preferably, the protective shroud is attached via the groove or projection to such inner boundary walls and bounded in the direction of the magnetic blowing field or in the direction of the central axis of the coil or the south-north direction of the permanent magnet through the side walls of the housing.

Preferably, ceramic, e.g. Steatite or cordierite can be used as the material for the protective cover and / or the arc extinguishing elements to allow a simple design and a good protection against arc damage.

According to a further independent aspect of the present invention, the invention also relates to a contactor for DC and / or AC operation with at least one movable contact, wherein the contactor further comprises a quenching chamber according to one of the above aspects.

According to an eighteenth aspect of the present invention, the contactor has a base part with a locking mechanism which cooperates with the pivotable pole plate, so that the quenching chamber can be locked and unlocked with the base part.

Different embodiments can be combined with each other completely or in relation to other features, and an embodiment can also be supplemented by further described features.

Fig. 1

Vorderansicht eines Schützes mit einer Löschkammer und einem Basisteil in verriegeltem Zustand gem. einem ersten Ausführungsbeispiel,

Fig. 2

vergrößerte Darstellung des Verriegelungsmechanismus Fig. 3 perspektivische Ansicht einer Löschkammer gem. einem zweiten Ausführungsbeispiel mit zwei Kühlkörpern,

Fig. 4

perspektivische Teilansicht mit zwei beweglichen Sicherheitsriegelungen,

Fig. 5

Schnittdarstellung eines Schützes gem. dem ersten Ausführungsbeispiel,

Fig. 6

vergrößerte Darstellung der Details VI aus Fig. 5, und

Fig. 7

vergrößerte perspektivische Teilansicht eines Lichtbogenlöschelements mit einem Streuabschnitt.

In the following the invention will be explained in more detail with reference to the drawings. Show it:

Fig. 1

Front view of a contactor with a quenching chamber and a base part in the locked state acc. a first embodiment,

Fig. 2

enlarged view of the locking mechanism Fig. 3 Perspective view of a quenching chamber acc. a second embodiment with two heat sinks,

Fig. 4

partial perspective view with two movable safety locks,

Fig. 5

Sectional view of a contactor acc. the first embodiment,

Fig. 6

enlarged representation of the details VI Fig. 5 , and

Fig. 7

enlarged partial perspective view of an arc extinguishing element with a scattering section.

In Fig. 1 is a front view of a contactor 1 is shown. The contactor 1 comprises a base part 3 with a drive 5 for driving movable contacts, which in Fig. 1 are not shown. On the base part 3 and connected to this form-fitting an extinguishing chamber 7 is arranged. The quenching chamber 7 is constructed essentially mirror-symmetrically about a central axis 8 with two electrical connections 9a, 9b. Furthermore, the quenching chamber is also constructed symmetrically symmetrical, so that the illustrated front is identical to the back of the quenching chamber 7, not shown. The quenching chamber 7 further comprises four pivotable pole plates 11 and four fixed pole plates 13, which are arranged on a housing 15 of the quenching chamber 7 in pairs at the front and back. Only two pivotable and two fixed pole plates 11a, b, 13a, b are shown.

On the top side facing away from the base part 3, a holder 19a is further formed by the housing 15 of the quenching chamber 7, wherein two locking levers 17a, b are held between a half-round support plate 21a and the housing 15 by the holder 19a such that a translational movement the locking lever 17a, b is made possible along its longitudinal axis. At the ends facing away from the holder 19a, the locking levers 17a, b are each pivotally mounted about a pivot axis 18a, b on the respective pivotable pole plates 11a, 11b. The pivot axes 18 a, b of the locking levers 17 a, b are arranged in the vicinity of the central axis 8, while the pivot axes 12 a, b of the pivotable pole plates 11 a, b are respectively spaced from the central axis 8. Each pivotable pole plate 11a, b has a laterally projecting actuating lever 23a, b which is provided above the respective electrical connection 9a, b, so that the pivotable pole plates 11a, b can be more easily actuated by the actuating levers 23a, b. Thus, pivotal movements of the left pivotable pole plate 11a in the clockwise and the right pivotable pole plate 11b are limited counterclockwise. In the respective opposite direction, the pivoting movements by second abutment surfaces 31 a, b is struck on the housing (see Fig. 1 ). On the sides facing away from the second stop surfaces 31, a hook 33a, b is formed on each pivotable pole plate 11a, b. In the in Fig. 1 illustrated locked state engages in each case a bolt 35a, b of the base part 3 in one of the hooks 33a, b, so that the quenching chamber 7 is not removable from the base part 3 and connected to this form-fitting manner.

Fig. 2 shows an enlarged view of the locking mechanism, consisting essentially of the hooks 33a, b and the bolts 35a, b.

In the Fig. 3 a quenching chamber 7 is shown according to a second embodiment, wherein the chamber 7 of a quenching chamber according to the first embodiment as in Fig. 1 and 2 shown essentially only differs in that two heat sink 37a, b are provided on the electrical terminals 9a, b. In Fig. 3 are those parts having identical or similar function as in the first embodiment, provided with identical reference numerals, so that the above description to Fig. 1 and 2 also applies to the second embodiment.

The heat sinks 37a, b each have a number of cooling fins 39, which are arranged along the circumferential direction of the heat sinks 37a, b. A bolt designed as an electrical connection is received in each case in a central bore of the heat sinks 37a, b, so that the connection plane is increased by the thickness of the heat sinks 37a, b. On the lower side of the heat sink 37a, b, not shown, which are designed as electrical terminals 9a, b bolts are each attached to a trained as a fixed contact contact plate, which passes through the housing 15. By the heat sink 37a, b, the electrical connections 9a, b and the fixed contacts are cooled efficiently.

On the side remote from the base part, the upper side of the housing 15, an elongated, square free surface is provided so that lamellar arc extinguishing elements 41 are exposed upwards. Between the arc extinguishing elements 41 a plurality of outlet openings 43 are represented by flow channels, which are each formed between two adjacent arc extinguishing elements 41.

The housing 15 consists of two housing halves 15a, b, which are connected to each other via connecting bolts 45, each having an inner bore. On the upper side of the housing 15, two brackets 19 a, b are provided, each with a support plate 21 a, b, with respect to Fig. 4 be explained in more detail.

As in Fig. 4 1, each holder 19a, b initially comprises a semicircular holder plate 21a, b, which is fastened to the housing 15 by means of a screw with intermediate storage of the free ends of the locking levers 17a, b. The support plate 21a, b is configured with two lateral lugs 47, so that the locking levers 17a, b are limited in the circumferential direction and freely movable substantially along its longitudinal axis. In an unlocked state of the pivotal pole plate 11b, the free end of the corresponding locking lever 17b protrudes beyond the upper edge of the housing 15 so that the user can easily determine the condition due to the specific color coding of the locking levers 17a, b. In a locked state, the locking levers 17a, b extend only to the upper edge of the support plate 21a, b. In this case, a movable safety latch 49a, b by a spring element, not shown, in a locked position, namely of the in Fig. 4 shown position in the direction of the support plate 21 a, b pressed so that the movable safety latch 49 a, b, the free ends of the locking lever 17a, b covers. Thus, an unwanted translational movement of the locking lever 17a, b prevented by the safety latch 49a, b.

In Fig. 5 is a front sectional view of the interior of a contactor 1 according to the first embodiment shown. However, the following explanations also apply to the second embodiment. The contactor 1 comprises two contact points 52, 53 each having a fixed contact 54, 55 and a respective movable contact 56, 57. The movable contacts 56, 57 of the two contact points 52, 53 are arranged on a common contact bridge 58. The contact bridge 58 can be moved by a magnetic drive and from a closed state of the contactor 1, in which the movable contacts 56, 57 touch the fixed contacts 54, 55 and thus the contact points 52, 53 are closed, are transferred in an open position. In the open position, the movable contacts 56, 57 are separated from the fixed contacts 54, 55. Due to the high currents and high voltages that are switched with the contactor, arcing 65, 66 between the respective fixed contacts 54, 55 and the associated movable contact 56, 57 arise when opening the contact points 52, 53.

Adjacent to the fixed contacts 54, 55, an arc guide plate 59, 60 is arranged at each contact point 52, 53, wherein the Lichtbogenleitbleche 59, 60 are each isolated by an air gap 61, 62 of the respective fixed contact 54, 55. The Lichtbogenleitbleche 59, 60 are shaped so that they form between the contact points 52, 53 a Lichtbogenleitschacht 69 which is substantially perpendicular to the longitudinal extent of the contact bridge 58 and through which the arcs 65 or 66 (depending on the arc running direction) by means of the Blasfelder the permanent magnets 63, 64 and / or blowing coils 67, 68 are blown in the direction of a quenching device 74.

The blowing coils 67, 68 are disposed substantially between the pivotable pole plates 11a, b, while the permanent magnets 63, 64 are disposed substantially between the fixed pole plates 13a, 13b. The pole plates 11a, b, 13a, b are in Fig. 5 not shown. Thus, a homogeneous blowing field is generated in each case, which efficiently blows the arcs 65, 66 into the extinguishing device 74.

At each of the two contact points 52, 53 adjacent to the air gap 61, 62, a protective cover 75, 76 is arranged. The protective linings 75, 76 are each between the air gap 61, 62, the permanent magnet 63, 64, the fixed contacts 54, 55th and the arc guide plates 59, 60 are arranged and extend from the respective fixed contacts 54, 55 upwards to the respective arc guide plates 59, 60. Thus, a closed space through the shields 75, 76, the fixed contacts 54, 55 and the respective arc guide plates 59, 60, so that the permanent magnets 63, 64 and the blowing coils 67, 68 are protected from arcing and resulting plasma when arcs 65, 66 penetrate into the confined space upon activation of the blowing coils 67, 68. In order to secure the protective linings 75, 76, it is provided that each of the two cylindrical receptacles 77, 78 of the permanent magnets 63, 64 formed by the housing has a projection which extends in the direction of the magnetic blowing field or in the north-south direction. Direction of the permanent magnets 63, 64 extends. The protective linings 75, 76 each have a groove 79, via which the protective linings 75, 76 are held on the receptacles 77, 78. Thus, the protective panels 75, 76 are also inserted in the direction of the extinguishing device and interchangeable.

The protective coatings 75, 76 are formed of an arc-resistant material. Preferably, a ceramic material, in particular steatite or cordierite, is used for this purpose. These materials have a certain porosity, so that they are relatively stable even at temperature shocks. This is particularly necessary because the arc temperature is up to 20000 K.

In the quenching device 74 on the arc guide plates 59, 60 a plurality of arc extinguishing elements 41 are arranged in a lamellar. Between the arc extinguishing elements 41, flow channels which are to be explained in more detail are formed, which essentially extend upward in the vertical direction from the arc guide plates 59, 60. Thus, the air and optionally the plasma, which arise between the contacts 54, 55, 56, 57 and between the Lichtbogenleitblechen 59, 60 are blown into the flow channels, and thus cooled by the arc extinguishing elements 41.

Fig. 6 shows an enlarged view of the section VI Fig. 5 , The arc-extinguishing elements 41 and the flow channels 82 are each subdivided into a scattering section 80 and an extinguishing section 81, wherein the scattering section 80 is separated from the extinguishing section 81 by two separating ribs 83, respectively. In the erase section, a wedge 84 is provided in each case, which extends from the separating webs 83 in the direction of the arc guide plates 60 rejuvenated. An air-deflecting recess is formed on the side surface of the arc-extinguishing element 41 via the separating webs 83. A second air deflecting recess is also formed on the rear side, not shown, with the second recess extending in the opposite direction. The arc extinguishing elements 41 are arranged side by side stacked, with two successive arc extinguishing elements 41 are mounted rotated by 180 ° to each other. Thus, the arc-extinguishing elements 41 can be formed identically, forming two groups of scattering portions 80 in opposite directions. In the air deflecting recesses 87 deflecting webs 85 are each formed with a curvature, so that the air can be deflected more efficiently.

In Fig. 7 is an enlarged partial perspective view of the scattering portion 80. At the level of the separating webs 83, a change in cross section is formed by forming a depression 86 between the two separating webs 83. The change in cross section serves to cool and redirect the air or the plasma more efficiently.

Claims (13)

Extinguishing chamber (7) for a contactor, wherein the extinguishing chamber (7) at least one contact point (52, 53) with a fixed contact (54, 55), at least one extinguishing device (74), and a blowing device (63, 64, 67, 68) for generating a magnetic blowing field which blows arcs (65, 66) into the extinguishing device (74),
wherein the blowing device (63, 64, 67, 68) at least one adjacent to the contact point (52, 53) arranged permanent magnet (63, 64) for generating a permanent magnetic blowing field and / or at least one adjacent to the contact point (52, 53) arranged coil (67, 68) for generating an electromagnetic blowing field, so that an arc (65, 66) emerging upon opening of the contact point (52, 53) is blown into the at least one extinguishing device (74),
wherein at least two magnetically conductive pole plates (11, 13) with the intermediate storage of the permanent magnet (63, 64) and / or the coil (67, 68) are arranged parallel to each other, so that the blowing effect by magnetic fields for guiding the arcs (65, 66) is reinforced,
characterized,
in that at least one of the pole plates (11, 13) is designed as a pivotable latch, by means of which the quenching chamber (7) can be removed in an unlocked state from a base part (3) of a contactor (1) and in a locked state with the base part (3). of the contactor (1) can be positively connected. Extinguishing chamber (7) according to claim 1, characterized in that a locking lever (17) with the pivotable pole plate (11) is eccentrically pivotally connected and held by a holder (19) such that a pivoting movement of the pole plate (11) to a translational movement of the locking lever (17) leads. Extinguishing chamber (7) according to claim 2, characterized in that the locking lever (17) pivotally connected at one end to the pole plate (11) and is held at the opposite, free end by the holder (19), which comprises a movable safety latch (49) which is pressed in the locked state of the pole plate (11) by a spring element in a locked position above the free end, so that the translational movement of the locking lever (17) is prevented by the safety lock (49). Extinguishing chamber (7) according to claim 3, characterized in that a on the locking lever (17) mounted display element in the unlocked state is visible and not visible in the locked state. Extinguishing chamber (7) according to one of claims 1 to 4, characterized in that the pivoting movement of the pivotable pole plate (11) in both directions is limited in each case by a stop surface (33 with 35, 31). Extinguishing chamber (7) according to claim 5, characterized in that the blowing device (63, 64, 67, 68) both at least one coil (67, 68) with a pivotable first pole plate (11) and at least one permanent magnet (63, 64 ) with a torsion-resistant second pole plate (13), wherein the first and the second pole plate (11, 13) are separated from each other by an intermediate gap. Extinguishing chamber (7) according to claim 5 or 6, characterized in that a stop surface (33 with 35) is formed by a housing. Extinguishing chamber (7) according to one of claims 1 to 7, characterized in that the extinguishing chamber has a cooling body (37), which is thermally conductively connected to the fixed contact (54, 55). Extinguishing chamber (7) according to claim 8, characterized in that the extinguishing chamber further comprises an electrically insulating housing (15), wherein the fixed contact (54, 55) passes through the housing (15) and thus forms an electrical connection (9) which the heat sink (37) is mounted. Extinguishing chamber (7) according to one of claims 1 to 9, characterized in that the extinguishing device (74) comprises an arc guide plate (59, 60), wherein an air gap in the vicinity of the contact point (52, 53) between the arc guide plate (59, 60 ) and the fixed contact (54, 55) is provided, wherein a protective covering (75, 76) between the air gap and the permanent magnet (63, 64) and / or the coil (67, 68) is arranged and from the fixed contact (54 , 55) extends towards the arc guide plate (59, 60), and wherein the protective lining (75, 76) is arranged to be insertable in the direction of the extinguishing device (74) and thus exchangeable. Extinguishing chamber (7) according to claim 10, characterized in that the protective covering (75, 76) via a groove (79) or a projection is fixed, which or perpendicular to the surfaces of the fixed contact (54, 55) and / or of the arc guide plate (59, 60). Contactor for DC and / or AC operation with at least one movable contact (56, 57), characterized by an extinguishing chamber (7) according to one of claims 1 to 11. Contactor according to claim 12 having a quenching chamber according to one of claims 1 to 7, characterized in that the contactor (1) has a base part (3) with a locking mechanism, which cooperates with the pivotable pole plate (11), so that the quenching chamber (7 ) with the base part (3) is locked and unlocked.

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