Switching devices for guiding and switching load currents

Abstract

A switching device (1, 2) for guiding and switching a load current comprises: a movable switching component (100), the movable switching component having a first movable contact (10) and a second movable contact (20); and a first fixed contact (30) and a second fixed contact (40). The switching device (1, 2) comprises a supporting device (200) for supporting the switching component (100). The switching component (100) is arranged so that the switching component moves between an on state and an off state at least by a rotational movement of the switching component and a translational movement of the supporting device (200).

Description

Technical Field

[0001] The present disclosure relates to a switching device for conducting and switching load currents (eg high DC currents), in particular for applications in the field of electric vehicles. Background Art

[0002] In order to be able to safely switch off short-circuit currents in the range of 10 kA or more, it is crucial that the arc generated by the short-circuit current has an impact on the switching device for as short a duration as possible, especially in the case of compact switching devices, such as are required for driving and charging operations of electric vehicles.

[0003] For switching nominal currents with a large number of switching cycles, the service life of the switching device depends mainly on the ability of the switching device to quickly move the arc generated during the opening of the switching contacts away from the surface of the switching contacts and to extinguish the arc as quickly as possible. The basic elements for achieving these requirements are: a fast switching drive with a switching drive that can achieve fast opening of contacts with a sufficiently large opening distance (for example, greater than 5 mm), an arc driver device based on an arc guide, an efficient magnetic deflection field arrangement and a suitable arc extinguishing system.

[0004] In the event of a short circuit, especially with high short-circuit currents, the switching contacts may experience a rapid dynamic opening / breaking due to the high current forces. The high energy content of the arc generated by the short-circuit current and detectable during the opening of the switching contacts may destroy the switching device. Furthermore, if it is not constructively ensured that the arc energy can be dissipated within a short time and that the arc can therefore be extinguished quickly, the required galvanic isolation of the switching paths of the switching device will no longer occur.

[0005] In addition to the above-mentioned characteristics of the switching device under nominal current conditions, an essential criterion for meeting this requirement is the structural configuration of the fixed and movable switching components of the switching device so that a strong dynamic magnetic blow field is established in the event of a short circuit.

[0006] EP 2131377 A1 relates to a relay having a magnetic drive. The magnetic drive comprises an armature which engages with a slide to move a contact spring in a corresponding relay position. US 4,048,600 A relates to a power relay comprising a pivoting armature on which a contact bridge having two contacts is mounted, the two contacts cooperating with contacts on a fixed contact carrier. US 2014 / 0360982 A1 relates to a switching device comprising an arc guide assembly provided for guiding an arc generated between a first contact and a second contact towards an extinguishing device. US 2014 / 0061160 A1 shows a circuit breaker having a DC arc extinguishing trough comprising a plurality of arc splitter plates.

[0007] It is desirable to provide a short-circuit proof, polarity independent, remotely controlled, compact switching device capable of performing a large number of switching operations, especially for DC currents, preferably greater than 100A and voltages up to about 1000V. Summary of the invention

[0008] The present disclosure describes a switching device for directing and switching of load current, wherein the switching device can reliably handle a large number of switching operations.

[0009] According to a possible embodiment, the switching device comprises a movable switching component, the movable switching component having a first movable contact and a second movable contact. The switching device further comprises a first fixed contact and a second fixed contact. The switching device comprises a supporting device to support the switching component. In the on state of the switching component, the first movable contact contacts the first fixed contact, and the second movable contact contacts the second fixed contact. In the off state of the switching component, the first movable contact is electrically separated from the first fixed contact, and the second movable contact is electrically separated from the second fixed contact. In addition, the switching component is arranged so that the switching component moves between the on state and the off state at least by a rotational movement of the switching component and a translational movement of the supporting device. The switching component has a supporting location, and the switching component is rotatably arranged at the supporting location. The switching component is mechanically coupled to the supporting device at a force application area of ​​the switching component, wherein the position of the force application area is different from the position of the supporting location.

[0010] The proposed switching device is implemented as a remote-controlled compact DC switching device, which is used to conduct and switch bidirectional load currents greater than 100A and bidirectional overcurrents, in particular short-circuit currents, and is capable of performing a large number of switching operations under nominal load conditions, for example, more than 100.000 switching operations.

[0011] The remote control feature of the switching device can be achieved by using an actuator, such as a magnetic actuator, to move the switching assembly. Therefore, the switching device does not require a mechanical lock or a manual switch to move the switching assembly between the off and on states.

[0012] According to one embodiment of the switching device, the movable switching assembly does not perform a purely linear movement during the switching operation, but rather a rotational movement or a combined linear and rotational movement via a suitable connection or joint (e.g., a ball joint support), so that a lever effect is generated for a quick disconnection of the contacts with an enlarged disconnection distance, and an additional lever effect is provided to break one or both welding contact pairs to reduce the welding tendency when switching high currents. By including a rotating assembly in the movement of the movable switching assembly, a faster disconnection can be achieved. This may result in a reduced welding tendency of the switching contacts.

[0013] According to one embodiment of the switching device, the movable switching assembly is substantially implemented as an E-shaped assembly to generate an efficient dynamic magnetic deflection blow field, the E-shaped assembly comprising two outer limbs and a middle limb. The end portion of the middle limb can be implemented as a joint, for example, a ball joint, which is used to realize the combined linear and rotational switching movement of the movable switching assembly.

[0014] According to an embodiment of the switching device, a common arc guide is provided for two of the movable contacts. The common arc guide has no physical fixed connection with the movable switching assembly to reduce the moving mass.

[0015] According to another embodiment, a switching device provides a compact arc driver arrangement and arc extinguishing arrangement including only one pair of arc guides and only one deionization extinguishing chamber per contact pair, respectively.

[0016] According to another embodiment of the switching device, the arc extinguishing arrangement is implemented as an assembly in which each contact pair includes two or more identical, serially arranged and inclined deionization chambers, wherein the side of the chamber facing the arc is arranged parallel to the arc, and the arc protrudes along the moving direction of the arc in the magnetic deflection field.

[0017] According to another embodiment, the switching device includes an arc extinguishing arrangement, wherein each contact pair of the arc extinguishing arrangement includes a corresponding long deionization-extinguishing chamber, wherein the individual extinguishing plates of the chamber are offset and / or tilted relative to each other in such a way that the side of the extinguishing chamber facing the arc is oriented parallel to the arc, and the arc protrudes along the movement direction of the arc in the magnetic deflection field.

[0018] Additional features and advantages are set forth in the detailed description which follows, and in part will be apparent to those skilled in the art from the description or learned by practicing the embodiments as described in the written description and claims hereof and the accompanying drawings. It should be understood that both the foregoing general description and the following detailed description are merely exemplary and are intended to provide an overview or framework for understanding the nature and character of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate one or more embodiments and, together with the detailed description, are used to explain the principles and operations of the various embodiments. Thus, the present disclosure will be more fully understood from the following detailed description in conjunction with the accompanying drawings, in which:

[0020] Figure 1 A first embodiment of a switching device for directing and switching a load current is shown;

[0021] Figure 2 A simplified view showing a movable switching assembly and a magnetic actuator of a switching device for directing and switching load current;

[0022] Figure 3 Demonstrating the current path occurring in the on state of the movable switching component of the switching device to create a dynamic magnetic blow field; and

[0023] Figure 4 A second exemplary embodiment of a switching device for directing and switching a load current is shown. DETAILED DESCRIPTION

[0024] A first embodiment of a switching device for guiding and switching a load current is described below in conjunction with Figures 1 to 3 Explained.

[0025] The switching device 1 for conducting and switching a load current comprises a movable switching assembly 100 having a first movable contact 10 and a second movable contact 20. The switching device further comprises a first fixed contact 30 and a second fixed contact 40. The switching device 1 further comprises a supporting device / bridge 200 to support the switching assembly 100. In the on-state of the switching assembly 100, the first movable contact 10 is in contact with the first fixed contact 30, and the second movable contact 20 is in contact with the second fixed contact 40. Furthermore, in the off-state of the switching assembly 100, the first movable contact 10 is electrically separated from the first fixed contact 30, and the second movable contact 20 is electrically separated from the second fixed contact 40. The switching assembly 100 is arranged so that the switching assembly moves between the on-state and the off-state by a rotational movement of the switching assembly 100 and a translational movement of the supporting device 200.

[0026] The switching assembly 100 has a supporting location 101, at which the switching assembly 100 is rotatably arranged. The switching assembly 100 is mechanically coupled to the supporting device 200 at a force application area 102 of the switching assembly. The position of the force application area 102 is different from the position of the supporting location. The switching assembly 100 is arranged so that the switching assembly moves between an on state and an off state by a rotational movement of the switching assembly 100 around the supporting location 101 and a translational movement of the supporting device 200. The translational movement of the supporting device acts on the switching assembly 100 in the force application area of ​​the switching assembly 100. Therefore, the supporting location of the switching assembly is maintained in a fixed position relative to the translational movement of the force application area 102 of the switching assembly, that is, the supporting location does not move translationally.

[0027] According to a possible embodiment, the switching device 1 comprises a magnetic actuator. The support device 200 and the magnetic actuator 300 are configured such that a translational movement of the support device 200 is caused by activation of the magnetic actuator 300 .

[0028] The switching assembly 100 is effective as a lever which is configured such that when the magnetic actuator 300 applies a force to the force application area 102 of the switching assembly 100 , the switching assembly performs a rotational movement about the bearing location 101 .

[0029] According to a possible embodiment of the switching device, the force application area 102 of the switching assembly 100 is arranged relative to the support location 101 and the virtual connection line between the first movable contact 10 and the second movable contact 20, so that the rotational movement of the force application area 102 of the switching assembly 100 causes the rotational movement of the first movable contact 10 and the second movable contact 20. The rotational movement of the first movable contact 10 and the second movable contact 20 is greater than the rotational movement of the force application area 102 of the switching assembly 100.

[0030] This means that the force application area is arranged at the rotatably implemented switching assembly 100, so that the switching assembly 100 is provided with a mechanical movement translation. The magnetic actuator 300 or the support device 200 acts on a short lever between the bearing position 101 and the force application area 102, so that a small (translation) movement of the magnetic actuator 300 / support device 200 causes a large (rotation) movement of the movable contact 10, 20.

[0031] according to Figures 1 to 3 In one embodiment of the switching device 1 shown, the switching assembly 100 is implemented as an E-shaped assembly having a first outer limb 110, a second outer limb 120 and an intermediate limb 130. The intermediate limb 130 is arranged between the first outer limb 110 and the second outer limb 120. The intermediate limb 130 is longer than the first outer limb 110 and the second outer limb 120. The first movable contact 10 is arranged at the end portion of the first outer limb 110. The second movable contact 20 is arranged at the end portion of the second outer limb 120. The support position 101 of the switching assembly 100 is arranged at the end portion of the intermediate limb 130.

[0032] According to a possible embodiment of the switching device 1 , the force application area 102 is arranged at a location of an intermediate limb 130 between the support location 101 and an imaginary connecting line between the first movable contact 10 and the second movable contact 20 .

[0033] According to Figures 1 to 3 In another embodiment of the switching device 1 shown, the switching assembly 100 is rotatably coupled to the holding device 400 via a ball joint 140 placed at the support location 101 of the switching assembly. The end portion of the intermediate limb 130 is rotatably and tiltably arranged at a socket of the supporting device 400, which is part of the inner housing of the switching device 1. In order to minimize friction, the ball joint can be permanently provided with a suitable lubricant or made of a suitable material with minimal surface friction, for example, Teflon.

[0034] The force transmission of the magnetic actuator 300 to the movable switching assembly 100 occurs at the force application area 102 via a rotatable pawl connection. During the force transmission of the actuator 300 to the force application area 102, the socket of the retaining device 400 and the supporting location 101 of the switching assembly 100 remain in an unchanged / fixed location. The force application area 102 is positioned between the ball joint 140 and the virtual connection line, which is located between the first movable contact 10 and the second movable contact 20. This gives the intermediate limb 130 the characteristics of a lever arm, which provides a rotational movement component during the switching operation when the contacts move in the open and closed state. According to a possible embodiment, the force application area 102 can be positioned approximately in the middle between the ball joint 140 and the virtual connection line, which is located between the first movable contact 10 and the second movable contact 20.

[0035] Thus, a faster switching movement and an increased disconnection distance between the movable contact and the fixed contact are achieved compared to a purely linear movement of the switching assembly 100. The switching device enables a large disconnection path between the movable contact and the fixed contact within a short disconnection time of, for example, 2 milliseconds. Since the mobility of the switching arc also increases with increasing distance between the fixed contact and the movable contact, the switching device allows the arc to move away from the switching contacts as early as possible. In addition, by increasing the total disconnection distance between the switching contacts 10, 30 or 20, 40, the risk of reignition of an already extinguished arc is also reduced.

[0036] The switching drive of the switching device 1 further allows to prevent welding of the switching contacts. When high currents are switched on, the movable switching assembly 100 can experience a short-term rebound during the first mechanical contact between the fixed contact and the movable contact, resulting in the risk of contact welding, which is associated with the formation of a short-term so-called bounce arc when switching under load. If the arc power is high enough, the switching contacts can melt at certain points, which can lead to contact welding when the contacts are immediately reclosed.

[0037] Contact welding may also occur in the event of a short-circuit current. When the contacts are open, a short-term breakage of the switching contacts may occur. This is caused by the dynamic magnetic force of the short-circuit current caused by the E-shaped form of the movable switching assembly 100. The E-shaped form will guide the current in the outer limbs 110, 120 of the movable switching assembly 100 in a way that makes the current flow in the opposite direction to the terminal contact rails 50, 60. This will cause a disconnection force on the movable switching assembly. Since the switch drive is still in the "on state" when the short-circuit arc is extinguished and the dynamic disconnection force gradually weakens, the resulting high-energy arc will cause the contact surface of the switching contact to melt, which usually leads to welding in the event of a rapid reclosure of the switching contacts.

[0038] according to Figures 1 to 3In the embodiment of the switching device 1 shown, in the case of contact welding, a torque is effective at the movable switching assembly 100 and generates a force in the movement direction of the magnetic actuator 300 during the disconnection of the switching assembly 100. The torque is caused by the forces of the magnetic actuator 300 and the support device 200, which act on the force actuation area 102 of the intermediate limb 130. The torque promotes the breaking of the already welded switching contacts.

[0039] Basically, the rotational movement component of the switching assembly 100 can also be realized, for example, by means of an annular bearing support or by means of a cylindrical or cylindrical-conical support placed at the bearing location 101 of the switching assembly 100 .

[0040] In order to minimize friction, the support may be provided with a suitable lubricant or made of a suitable material with minimal surface friction, such as Teflon.

[0041] The ball joint mounting suspension of the switching assembly provides the advantage of additional leverage to break contact welds. For example, due to slightly different contact topography during re-contact under load, if welding occurs on only one of the two contact pairs and not on the other contact pair, the ball joint suspension 140 of the switching assembly 100 creates an increased leverage on the welded contact pair along the virtual connection line between the ball joint and the welded contact, which enables breaking the weld.

[0042] For fast switching off of nominal current as well as overcurrent and short circuit current, it is advantageous to reduce moving mass during switching operation.For most conventional switching devices with arc driver assembly and arc extinguishing assembly, the movable switching assembly 100 is provided with guide rails for fast arc extraction.

[0043] According to an embodiment of the switching device 1, the switching device comprises a common arc guide 500 for the first movable contact 10 and the second movable contact 20, such as Figure 1 The common arc guide rail 500 does not contact the switching assembly 100 when the switching assembly is in the on state, and contacts the switching assembly 100 only when the switching assembly is in the off state. The common arc guide rail 500 includes a first arc guide rail portion 511, a second arc guide rail portion 521, and a connecting portion 501 connecting the first arc guide rail portion and the second arc guide rail portion.

[0044] The switching device 1 comprises a first arc extinguishing chamber 600 and a second arc extinguishing chamber 700. A first pair 510 of arc guides are arranged between the first arc extinguishing chamber 600 and a pair of first movable contacts 10 and first fixed contacts 30. A second pair 520 of arc guides are arranged between the second arc extinguishing chamber 700 and a pair of second movable contacts 20 and second fixed contacts 40.

[0045] like Figure 1 As shown, the first pair 510 of arc guides includes a first arc guide portion 511 disposed between the first movable contact 10 and the first arc extinguishing chamber 600. The second pair 520 of arc guides includes a first arc guide portion 521 disposed between the second movable contact 20 and the second arc extinguishing chamber 700. The first arc guide portion 511 of the first pair 510 of arc guides and the first arc guide portion 521 of the second pair 520 of arc guides are formed as part of a common arc guide 500.

[0046] according to Figure 1 In the illustrated possible embodiment of the switching device 1, the first arc guide portion 511 of the first pair 510 of arc guides is formed as an extension of the extinguishing plate 601 of the first arc extinguishing chamber 600. The first arc guide portion 521 of the second pair 520 of arc guides is formed as an extension of the extinguishing plate 701 of the second arc extinguishing chamber 700. The first arc guide portion 511 of the first pair 510 of arc guides and the first arc guide portion 521 of the second pair 520 of arc guides are not in contact with the switching assembly 100 in the switched-on state of the switching assembly.

[0047] The arc guide rail of the movable contact is not directly connected to the movable switching assembly 100 to reduce the moving mass of the movable switching assembly 100. The first arc guide rail parts 511 and 521 are connected by the connecting part 501 and are thus formed as a single piece with a substantially U-shaped profile. The outer ends of the arc guide rail parts 511 and 521 are directly connected to the end extinguishing plates 601 and 701. The outer ends of the arc guide rail parts 511 and 521 are designed to be located at the end of the two arc extinguishing chambers 600 and 700.

[0048] An arcuate common arc guide 500 comprising guide rail portions 511 and 521 and a connecting portion 501 is permanently connected to the housing of the switching device. In the on state of the switching assembly 100, there is no physical connection between the common arc guide 500 and the movable switching assembly 100. The upper surface of the movable switching assembly 100 is in physical contact with the arcuate inner portion of the arc guide 500 only in the off state of the movable switching assembly 100. Therefore, the arc generated in the magnetic blow field between the disconnected contacts can move toward the arc extinguishing chambers 600 and 700 in the same manner as in the case of a fixed and rigid connection between the arc guide 500 and the movable switching assembly 100.

[0049] like Figure 3As best shown, the switching device 1 comprises a first terminal contact rail 50 and a second terminal contact rail 60. The first fixed contact 30 is placed on the first terminal contact rail 50 and the second fixed contact 40 is placed on the second terminal contact rail 60. In the switched-on state of the switching assembly 100 or when switched off and when a conductive arc occurs between the first outer limb 110 of the switching assembly and the first terminal contact rail 50, a first current path is formed and is formed in a U-shape. Similarly, a U-shaped second current path is formed between the second outer limb 120 of the switching assembly 100 and the second terminal contact rail 60.

[0050] In order to achieve a high dynamic magnetic field strength in the event of a short circuit, the movable switching assembly 100 is implemented with an E-shaped profile, as explained above. Due to this shape of the movable switching assembly 100, the first current path and the second current path generated by the formation of an arc in the switched-on state of the switching assembly 100 or when a switching arc occurs are respectively U-shaped. In the event of a short-circuit current, these U-shaped loops generate both a dynamic disconnection force and a strong dynamic blow field on both sides, which causes the arcs of the two contact pairs 10, 30 and 20, 40 to move rapidly in the direction of the corresponding arc extinguishing chambers 600 and 700 independently of the direction of the current flow.

[0051] For arc extinguishing at nominal current, each of the two contact pairs of contacts 10, 30 and 20, 40 and the arc guide portions 511, 521 are arranged inside the permanent magnet drive arrangement 800. Figure 1 As shown, the permanent magnet drive device 800 comprises a centrally arranged rectangular permanent magnet 810 with a lateral pole plate 820. The desired distance between these pole plates 820 and the movable contacts 10 and 20 can be adjusted by rectangular flux-conducting ferromagnetic spacers or spacers 830, the side surfaces of which are each in contact with one of the poles 810 and the pole plates 820 over their entire surface.

[0052] In the permanent magnetic blow field established in this way, one of the two arcs moves in the direction of one of the arc extinguishing chambers 600, 700, while the other of the arcs moves in the opposite direction toward the wall of the switching chamber of the switching device when the movable switching assembly 100 moves to the off state under load according to the direction of the current. The wall of the switching chamber is made of an insulating material with sufficient thermal stability at least in this area.

[0053] It is possible that the arc running in the direction towards the switching chamber wall does not come into direct contact with the chamber wall, because the other of the arcs running simultaneously towards one of the arc extinguishing chambers is extinguished immediately upon reaching the extinguishing chamber. This is achieved by the fact that these so-called deionized extinguishing chambers 600 and 700 are equipped with a large number of extinguishing plates 601, 701, so that in this way, a high total arc voltage is formed very quickly due to the division of the arc into a corresponding number of partial arcs. The high total arc voltage ensures that both arcs are extinguished quickly when the total arc voltage is higher than the drive voltage applied between the first terminal contact rail 50 and the second terminal contact rail 60.

[0054] In the case of a short circuit current, the magnetic field strength of the dynamic blow field generated by the shape of the movable switching assembly 100 exceeds the strength of the permanent magnetic field. Therefore, each of the arcs will always be driven in one of the arc extinguishing chambers 600, 700 independently of the direction of current flow, so that the partial arc formed by the two arcs in the arc will generate a high total voltage very quickly.

[0055] In this way, the switching device 1 allows the realization of an arc driver and an arc extinguishing arrangement which is implemented as a compact switch for high switching powers with only two deionized arc extinguishing chambers. The limitation of only two contact pairs provides the additional advantage that the heat dissipated from the contact pairs is low when conducting large currents, which in turn contributes to the realization of a compact switching device.

[0056] Figure 4 A second embodiment of a switching device 2 is shown. The switching assembly 100 is moved by a translational and rotational movement of the switching assembly. In order to move the switching assembly 100 from the off state to the on state, the support device 200 supporting the switching assembly 100 is moved by a translational movement downwards. The translational movement of the support device 200 is caused by the activation of the magnetic actuator 300. When the movable contacts 10, 20 are in contact with the fixed contacts, the support device 200 is further moved downwards by the translational movement, which causes the switching assembly 100 to perform a rotational movement about the bearing point 101.

[0057] according to Figure 4 In the advantageous embodiment of the switching device shown, the first arc extinguishing chamber 600 and the second arc extinguishing chamber 700 comprise at least a first partial extinguishing plate 610, 710 and at least a second partial extinguishing plate 620, 720. Figure 4 As shown, the first partial extinguishing plates 610 , 710 are inclined toward the switching assembly 100 relative to the second partial extinguishing plates 620 , 720 .

[0058] according to Figure 4In the embodiment of the switching device 2 shown, the arc extinguishing device comprises two separate, identical extinguishing chambers 600 and 700 connected in series for each of the contact pairs. When the movable switching assembly 100 is moved in the fully switched-off state, the two upper subchambers 610 and 620 facing the movable switching assembly 100 are tilted relative to the lower subchambers 620 and 720 in such a way that the distance between the uppermost extinguishing plates 601 and 701 of the two upper extinguishing subchambers 610 and 710 and the ends of the arc guide rail sections 511 and 521 is only small in each case. The inclined arrangement of the arc extinguishing chambers 600 and 700 allows to reduce the length of the arc guide rail sections 511 and 521 on one side of the movable switching assembly 100, which leads to a rapid entry of the arc into the extinguishing chambers 600 and 700.

[0059] A further advantage of the inclined arc extinction chamber is that the outer edge of the arrangement of the extinction plates substantially has the profile of a convex arc which is convex in the magnetic blow field in the direction of movement of the arc. This is particularly advantageous for deionization chambers equipped with a large number of extinction plates, the entire arc front running into the extinction system at the same time and thus extinguishing the arc quickly.

[0060] As an alternative to tilting two identical deionization chambers, the arc extinguishing system may include an arrangement of several identical short deionization chambers, each tilted at a small angle to one another.

[0061] According to another embodiment of the switching device, the first arc extinguishing chamber 600 and the second arc extinguishing chamber 700 respectively include a plurality of extinguishing plates. The extinguishing plates are displaced or tilted relative to each other so that the corresponding sides of the first arc extinguishing chamber 600 and the second arc extinguishing chamber 700 are placed parallel to the arc, which is bent along the running direction of the arc in the magnetic blow field of the switching device. This embodiment of the extinguishing system includes only one long extinguishing chamber, the respective extinguishing plates of which are displaced and / or tilted relative to each other so that the front of the extinguishing chamber facing the front of the arc is substantially parallel to the raised arc in the magnetic blow field, which is not shown in the figure.

[0062] For embodiments of a tilted extinguishing chamber or a tilted and / or shifted extinguishing plate, the short arc guide rails 511, 521 on one side of the movable switching assembly 100 can be fixed to the movable switching assembly 100, or can form a common part with the movable switching assembly 100 in the form of an extended end of the movable switching assembly 100.

[0063] Reference numerals list

[0064] 1. First Embodiment of Switching Device

[0065] 2. Second Embodiment of Switching Device

[0066] 10 First movable contact

[0067] 20 Second movable contact

[0068] 30 First fixed contact

[0069] 40 Second fixed contact

[0070] 50 First terminal contact rail

[0071] 60 Second terminal contact rail

[0072] 100 Removable Switch Components

[0073] 101 Support positioning

[0074] 102 Force application area

[0075] 110 First external limb

[0076] 120 Second external limb

[0077] 130 Intermediate limb

[0078] 140 Ball joint

[0079] 200 Fixed contact bridge

[0080] 300 Magnetic Actuator

[0081] 400 Support device

[0082] 500 Arc Guide

[0083] 501 A connecting portion between the first arc guide portion and the second arc guide portion

[0084] 510 The first pair of arc guide rails

[0085] 511 First arc guide rail part

[0086] 520 Second pair of arc guide rails

[0087] 521 Second arc guide rail part

[0088] 600 First Arc Extinction Chamber

[0089] 601 Extinguishing Board

[0090] 610 Extinguish the first part of the board

[0091] 620 Extinguish the second part of the board

[0092] 700 Second arc extinction chamber

[0093] 701 Extinguishing Board

[0094] 710 Extinguish the first part of the board

[0095] 720 Extinguish the second part of the board

[0096] 800 Permanent Magnet Drive Arrangement

[0097] 810 permanent magnet

[0098] 820 Plate

[0099] 830 Spacer

Claims

1. A switching device for guiding and switching a load current, the switching device comprising: - a movable switching assembly (100), the movable switching assembly having a first movable contact (10) and a second movable contact (20), - a first fixed contact (30) and a second fixed contact (40), - a supporting device (200), the supporting device supporting the switching assembly (100), - a magnetic actuator (300), - wherein in the switched-on state of the switching assembly (100), the first movable contact (10) is in contact with the first fixed contact (30), and the second movable contact (20) is in contact with the second fixed contact (40), - wherein in the off state of the switching assembly (100), the first movable contact (10) is electrically separated from the first fixed contact (30), and the second movable contact (20) is electrically separated from the second fixed contact (40), - wherein the switching assembly (100) is arranged such that the switching assembly moves between the on-state and the off-state at least by a rotational movement of the switching assembly and a translational movement of the support device (200), - wherein the support device (200) and the magnetic actuator (300) are configured such that the translational movement of the support device (200) is caused by activation of the magnetic actuator (300), - wherein the switching assembly (100) has a bearing location (101), at which the switching assembly is rotatably arranged, - wherein the switching assembly (100) is mechanically coupled to the support device (200) at a force application area (102) of the switching assembly, wherein the position of the force application area (102) is different from the position of the support location (101), It is characterized in that The switching assembly (100) is implemented as an E-shaped assembly having a first outer limb (110) and a second outer limb (120) and an intermediate limb (130), wherein the intermediate limb is arranged between the first outer limb (110) and the second outer limb (120) and is longer than the first outer limb (110) and the second outer limb (120). The first movable contact (10) is arranged at an end portion of the first outer limb (110), and the second movable contact (20) is arranged at an end portion of the second outer limb (120), The support position (101) of the switching assembly (100) is arranged at an end portion of the intermediate limb (130), and the force application area (102) is arranged at a position of the intermediate limb (130) between the support position (101) and a virtual connecting line, wherein the virtual connecting line is located between the first movable contact (10) and the second movable contact (20).

2. The switching device according to claim 1, The switching assembly (100) is effective as a lever, which is configured so that when the magnetic actuator (300) applies a force to the force application area (102) of the switching assembly (100), the switching assembly performs the rotational movement around the support position (101).

3. The switching device according to claim 1, The force application area (102) of the switching component (100) is arranged relative to the support position (101) and the virtual connection line between the first movable contact (10) and the second movable contact (20), so that the rotational movement of the force application area (102) of the switching component (100) causes the rotational movement of the first movable contact (10) and the second movable contact (30), and the rotational movement of the first movable contact and the second movable contact is greater than the rotational movement of the force application area (102) of the switching component (100).

4. The switching device according to claim 2 or 3, The switching assembly (100) is rotatably coupled to a holding device (400) via a ball joint (140) placed at the supporting position (101) of the switching assembly (100).

5. The switching device according to claim 1, comprising: A common arc guide rail (500) is used for the first movable contact (10) and the second movable contact (20), wherein the common arc guide rail (500) has no contact with the switching component (100) when the switching component is in the on state.

6. The switching device according to claim 1, comprising: A first arc extinguishing chamber (600) and a second arc extinguishing chamber (700).

7. The switching device according to claim 6, comprising: - a first pair (510) of arc guides, said first pair of arc guides being arranged between said first arc extinction chamber (600) and a first pair of said first movable contact (10) and said first fixed contact (30), - a second pair (520) of arc guides, said second pair of arc guides being arranged between said second arc extinction chamber (700) and a second pair of said second movable contact (20) and said second fixed contact (40).

8. The switching device according to claim 7, - wherein the first pair (510) of arc guides comprises a first arc guide portion (511), the first arc guide portion being arranged between the first movable contact (10) and the first arc extinction chamber (600), - wherein the second pair (520) of arc guides comprises a first arc guide portion (521), the first arc guide portion being arranged between the second movable contact (20) and the second arc extinction chamber (700), - wherein the first arc guide portion (511) of the first pair (510) of arc guides and the first arc guide portion (521) of the second pair (520) of arc guides form part of a common arc guide (500) for the first movable contact (10) and the second movable contact (20), wherein the common arc guide (500) has no contact with the switching assembly (100) in the switched-on state of the switching assembly.

9. The switching device according to claim 8, - wherein the first arc guide portion (511) of the first pair (510) of arc guides is formed as an extension of the extinguishing plate (601) of the first arc extinguishing chamber (600), - wherein the first arc guide portion (521) of the second pair (520) of arc guides is formed as an extension of the extinguishing plate (701) of the second arc extinguishing chamber (700).

10. The switching device according to claim 1, comprising: - a first terminal contact rail (50) and a second terminal contact rail (60), - wherein the first fixed contact (30) is placed on the first terminal contact rail (50) and the second fixed contact (40) is placed on the second terminal contact rail (60).

11. The switching device according to claim 6, - wherein the first arc extinguishing chamber (600) and the second arc extinguishing chamber (700) comprise at least a first partial extinguishing plate (610, 710) and at least a second partial extinguishing plate (620, 720), - wherein the first partial extinguishing plate (610, 710) is inclined toward the switching assembly (100) relative to the second partial extinguishing plate (620, 720).

12. The switching device according to claim 6, - wherein the first arc extinguishing chamber (600) and the second arc extinguishing chamber (700) respectively comprise a plurality of extinguishing plates, - wherein the extinguishing plates are displaced or tilted relative to each other so that the respective sides of the first arc extinguishing chamber (600) and the second arc extinguishing chamber (700) are placed parallel to the arc, which is bent in the magnetic blow field of the switching device along the running direction of the arc.

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