Abstract
A switching device arrangement has a first contact set and a second contact set. The first contact set includes a first electric arc contact element and a first nominal current contact element. The first nominal current contact element can be moved relative to the first electric arc contact element. A first transmission is introduced in a kinematic chain in order to generate a relative movement of the first nominal current contact element and the first electric arc contact element. The first transmission is operationally connected between a stationary counter bearing and the first electric arc contact piece.
Claims
1. A switching device arrangement, comprising: a first contact set and a second contact set, said first contact set being disposed for movement relative to said second contact set in order to produce a switching contact between respective contacts; said first contact set having an arcing contact piece and a nominal current contact piece movably disposed relative to one another; a kinematic chain connected to said nominal current contact piece configured to impress a movement onto said nominal current contact piece; a stationary counter bearing; and a gearing forming an operative connection between said stationary counter bearing and said arcing contact piece, wherein a relative movement is effected between said nominal current contact piece and said arcing contact piece via said gearing; said stationary counter bearing being coupled to said gearing via a slotted guide path.
2. The switching device arrangement according to claim 1, wherein said stationary counter bearing is configured to control a transmission behavior of said gearing.
3. The switching device arrangement according to claim 1, wherein said gearing is mounted on said first contact set.
4. The switching device arrangement according to claim 3, wherein said gearing is mounted on said nominal current contact piece.
5. The switching device arrangement according to claim 1, wherein said nominal current contact piece is mounted movably in relation to said stationary counter bearing.
6. The switching device arrangement according to claim 1, wherein said gearing includes a control element guided on said stationary counter bearing.
7. The switching device arrangement according to claim 1, wherein the gearing comprises a pivot element pivotally attached to said nominal current contact piece.
8. The switching device arrangement according to claim 1, wherein said gearing comprises a lever arrangement.
9. The switching device arrangement according to claim 1, wherein said gearing is a first gearing and said kinematic chain comprises a second gearing for coupling in a movement at said nominal current contact piece.
10. The switching device arrangement according to claim 9, wherein said second gearing is stationarily mounted.
11. The switching device arrangement according to claim 1, wherein said kinematic chain includes an electrically insulating transmission element.
12. The switching device arrangement according to claim 11, wherein said electrically insulating transmission element is an insulating nozzle protruding into a clearance between the contacts.
13. The switching device arrangement according to claim 1, which comprises a common drive apparatus commonly driving said first and second contact sets.
14. The switching device arrangement according to claim 1, wherein said gearing is a first gearing and said kinematic chain includes a second gearing, and wherein said first gearing and said second gearing are arranged in succession in a direction of a flow of force.
15. The switching device arrangement according to claim 14, wherein said second gearing includes a stationarily mounted rotation element.
16. The switching device arrangement according to claim 15, wherein said rotation element is a gearwheel.
17. The switching device arrangement according to claim 15, wherein said rotation element is a pivot lever.
18. The switching device arrangement according to claim 14, wherein one of said first and second gearings is configured to convert a driving movement into an oppositely directed driven movement and a respectively other gearing is configured to amplify the oppositely directed movement.
19. The switching device arrangement according to claim 14, wherein said second gearing converts the driving movement into the oppositely directed driven movement and said first gearing amplifies the oppositely directed movement.
Description
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
(1) FIGS. 1 to 5 show a first variant of a switching device arrangement,
(2) FIGS. 6 to 10 show a second variant of a switching device arrangement,
(3) FIGS. 11 to 12 show a third variant of a switching device arrangement,
(4) FIGS. 13 to 14 show a fourth variant of a switching device arrangement, and
(5) FIGS. 15 to 16 show a fifth variant of a switching device arrangement.
DESCRIPTION OF THE INVENTION
(6) FIGS. 1 to 16 illustrate different variants of switching device arrangements. Here, the switching device arrangements are constructed identically in principle. However, the respective functional modules (for example gearings) may be embodied differently. The differently embodied functional modules can each be replaced for one another in the individual variants of the switching device arrangements. The primary structure and the primary mode of operation of a switching device arrangement in a first variant will be described firstly with reference to FIGS. 1 to 5. The second variant shown in FIGS. 6 to 10, the third variant shown in FIGS. 11 and 12, and the fourth variant shown in FIGS. 13 and 14 and the fifth variant shown in FIGS. 15 and 16 differ from one another with regard to the design of individual functional modules, wherein the function and structure are maintained in principle. Individual functional modules (for example gearings) of the different variants can be exchanged for one another.
(7) The first variant of a switching device arrangement shown in FIG. 1 has an encapsulating housing 1. The encapsulating housing 1 is formed in the present case from electrically conductive materials, wherein the encapsulating housing itself is grounded. However, the encapsulating housing may also be formed at least in portions or completely from an electrically insulating material. The encapsulating housing 1 forms a barrier around an internal volume in order to enclose an electrically insulating fluid within the encapsulating housing 1. This electrically insulating fluid should preferably be present in the gaseous state. It is thus advantageous by way of example to enclose a gas such as sulfur hexafluoride, nitrogen or CO.sub.2 in the interior of the encapsulating housing 1. Alternatively, however, the interior of the encapsulating housing 1 may also be filled with an insulating liquid, such as an insulating oil or an insulating ester. In order to increase the electrical insulation of the fluid in the interior of the encapsulating housing 1, it is advantageous to subject the fluid to an overpressure, such that the encapsulating housing 1 is to be formed as a pressure vessel, which withstands a differential pressure between the interior and the exterior of the encapsulating housing 1. Atmospheric air is preferably located outside the encapsulating housing 1 and is below atmospheric pressure.
(8) An interrupter unit of the switching device arrangement is arranged within the encapsulating housing 1. The interrupter unit is supported in an electrically insulated manner with respect to the encapsulating housing 1. In order to support the interrupter unit, solid insulators can be used by way of example, which provide a supporting effect in relation to the encapsulating housing 1. For reasons of clarity, in FIG. 1 an illustration of the support of the interrupter unit there in the interior of the encapsulating housing 1 has been omitted.
(9) Merely an individual interrupter unit or a number of interrupter units electrically insulated with respect to one another may be arranged in the interior of the encapsulating housing 1. It is thus possible, by way of example, to arrange a plurality of interrupter units within a common encapsulating housing, which serve to switch a plurality of phases of a polyphase electrical energy transmission system. With an arrangement of an individual interrupter unit within an individual encapsulating housing 1 (as illustrated in FIG. 1), a plurality of encapsulating housings 1 are to be provided accordingly with a plurality of interrupter units in order to form a switching device arrangement that can also switch polyphase electrical energy transmission systems.
(10) The interrupter unit, as shown in FIG. 1 ff., is an interrupter unit of a high-voltage circuit breaker, which serves to interrupt an electrical current. The interrupter unit according to FIG. 1 ff. serves to interrupt or to establish a current path. The interrupter unit has a clearance between contacts 2. The clearance between contacts 2 divides the interrupter unit into a first contact side 3 and a second contact side 4. The two contact sides 3, 4 are arranged here substantially coaxially with a longitudinal axis 5. The two contact sides 3, 4 each comprise parts of the current path to be interrupted, wherein the electrically conductive parts of the respective contact sides 3, 4 preferably permanently convey the same electrical potential. The two contact sides 3, 4 are electrically insulated from one another at the separation point of the clearance between contacts 2, such that a potential difference can be kept electrically insulated via the clearance between contacts 2. In order to incorporate the interrupter unit of the switching device arrangement, the first contact side 3 is connected to a first connection line 6. Similarly, the second contact side 4 is also connected to a second connection line 7. The two connection lines 6, 7 are each guided through a wall of the encapsulating housing 1 in a manner electrically insulated via connection pieces arranged on the circumferential side in the encapsulating housing 1. Bushing modules not shown in the figures are arranged on the connection pieces. It is thus possible to introduce a connection line 6, 7 through an electrically conductive encapsulating housing 1 into the interior of the encapsulating housing 1. It is thus possible to incorporate the current path, which can be switched via the interrupter unit, into an electrical energy transmission network outside the encapsulating housing 1. For this purpose, outdoor bushings can be arranged for example on the connection pieces of the encapsulating housing 1 as bushing modules and can be connected to corresponding overhead lines via overhead conductors.
(11) The first contact side 3 has a first armature body 8. The first armature body 8 is formed in the present case from a number of parts, wherein the first armature body 8 is a substantially hollow rotation body, which is oriented coaxially with the longitudinal axis 5. In its interior, the first armature body 8 has a receiving space, in which a gearing can be arranged, for example. The interior of the first armature body 8 is dielectrically shielded, since the first armature body 8 is formed from an electrically conductive material. Alternatively to a multi-part embodiment, the first armature body 8 may also be formed in one part. The first connection line 6 is connected to the first armature body 8, such that an electrical potential can be transmitted to the first armature body 8 and the first armature body 8 is part of a switchable current path. The first armature body 8 is mounted in a stationary manner and forms a stationary base.
(12) The second contact side 4 has a second armature body 9. The second armature body 9 deviates in terms of its shaping from the first armature body 8. However, the second armature body 9 is also formed in a number of parts, similarly to the first armature body 8, wherein the second armature body 9 is also formed preferably as a substantially rotationally symmetrical hollow body, which has in its interior a receiving space. The second armature body 9 should be oriented with its axis of rotation coaxial with the longitudinal axis 5. Here, end faces of the first armature body 8 and the second armature body 9 should face toward one another. It may be that the end faces facing toward one another of the two armature bodies 8, 9 are interconnected via an electrically insulating component 10. The electrically insulating component 10 may produce, for example in the form of one or more insulating bars, a mechanical stiffening between the two armature bodies 8, 9 of the first contact side 3 and of the second contact side 4. In addition, the electrically insulating component 10 may also be arranged coaxially with the longitudinal axis 5 for example in the manner of a pipe, wherein the end faces of a pipe of this type facing away from one another are connected to the first and to the second armature body 8, 9 respectively. However, deviating shapings of the electrically insulating component 10 may also be provided. By way of example, ceramic materials, glass fiber-reinforced plastics, insulating resins, etc. are suitable as electrically insulating materials for forming the electrically insulating component 10. A closed switching device can be formed on the interrupter unit of a switching device arrangement by an electrically insulating component 10.
(13) The two armature bodies 8, 9 of the first and the second contact side 3, 4 each delimit the outer enveloping contour of the interrupter unit. The two armature bodies 8, 9 are arranged at a fixed angle to one another and form a stationary base. The two armature bodies 8, 9 are preferably formed from an electrically conductive material, for example aluminum or copper, which on the one hand form a current path portion of the switchable current path and on the other hand provide mechanical stabilization of the interrupter unit. A first contact set 11 and a second contact set 12 are mounted movably on the first armature body 8 and on the second armature body 9. The two contact sets 11, 12 are each connected electrically conductively to the respective armature body 8, 9. The first contact set 11 has a first nominal current contact piece 13. The first nominal current contact piece 13 is substantially tubular and is arranged coaxially with the longitudinal axis 5. Furthermore, the first nominal current contact piece 13 is mounted on the first armature body 8 so as to be displaceable along the axis 5. The first armature body 8 thus forms a stationary base for the first nominal current contact piece 13. At its end facing toward the second armature body 9, the first nominal current contact piece 13 is equipped with flexibly deformable contact fingers 13a. The flexibly deformable contact fingers 13a are designed to pass over a contact piece formed in a mirror-inverted manner. A contact piece of this type formed in a mirror-inverted manner is formed on the second contact arrangement 12 in the form of a substantially tubular second nominal current contact piece 14. In the present case both the first nominal current contact piece 13 and the second nominal current contact piece 14 are mounted movably, such that, during a switching movement of the interrupter unit of the switching device arrangement, the two nominal current contact pieces 13, 14 are moved. The second nominal current contact piece 14 is formed here substantially rotationally symmetrically and is arranged coaxially with the longitudinal axis 5. The circumferential-side cross section of the second nominal current contact piece 14 is formed here in a mirror-inverted manner in relation to the flexible contact fingers 13a of the first nominal current contact piece 13, such that the contact fingers 13a can slide over the outer circumferential side of the substantially tubular nominal current contact piece 14. The second nominal current contact piece 14 is guided displaceably in a tubular neck of the second armature body 9 along the longitudinal axis 5. The tubular neck of the second armature body 9 is thickened in a bead-like manner at its end facing toward the first armature body 8, such that a dielectrically shielding shaping is attained in the region of the clearance between contacts 2. Similarly, on the outer circumference of the first nominal current contact piece 13 in the region of the flexible contact fingers 13a, a toroidal widening is provided on the first nominal current contact piece 13 and serves to dielectrically shield the clearance between opening contacts 2.
(14) The first nominal current contact piece 13 is assigned a first arcing contact piece 15. Here, the first arcing contact piece 15 is pin-shaped and is mounted slidingly on the first nominal current contact piece 13. The first nominal current contact piece 13 surrounds the first arcing contact piece 15, wherein the first arcing contact piece 15 and the first nominal current contact piece 13 are oriented coaxially with one another and with the longitudinal axis 5. In order to guide the first arcing contact piece 15 in a sliding manner, the first nominal current contact piece 13 is equipped with a guide bush 16. The second nominal current contact piece 14 is equipped with a second arcing contact piece 17. The second arcing contact piece 17 is formed in a substantially bush-like manner and is arranged in a mirror-inverted manner with respect to the pin-shaped first arcing contact piece 15. It is thus possible for the pin-shaped first arcing contact piece 15 to enter the bush opening of the second arcing contact piece 17. The second arcing contact piece 17 is arranged coaxially with the longitudinal axis 5 and coaxially with the second nominal current contact piece 14. Here, the second arcing contact piece 17 conveys the same electrical potential as the second nominal current contact piece 14. In the present case the second nominal current contact piece is connected at a fixed angle to the second arcing contact piece 17. The first nominal current contact piece 13 and the first arcing contact piece 15 are arranged movably relative to one another and permanently convey the same electrical potential. An insulating nozzle 18 is attached to the second nominal current contact piece 14. The insulating nozzle 18 is secured to the second nominal current contact piece 14 on the inner circumferential side and surrounds the contact region of the second arcing contact piece 17. Here, the insulating nozzle 18 is formed as a rotationally symmetrical body and has an insulating nozzle channel, within which part of the clearance between contacts 2 extends. The contact region of the first arcing contact piece 15 also protrudes into the insulating nozzle channel, wherein the end of the insulating nozzle 18, which protrudes in the direction of the second armature body 9, is in turn surrounded at least in portions by the first nominal current contact piece 13. An annular coupling element 19 is also arranged on the insulating nozzle 18. A drive apparatus is attached to the second arcing contact piece 17 or to the second nominal current contact piece 14 and can displace the second nominal current contact piece 14 and the second arcing contact piece 17 in the direction of the longitudinal axis 5. In order to transfer the interrupter unit from the switch-off position shown in FIG. 1 into a switch-on position (see FIG. 5), an axial movement of the second arcing contact piece 17 or of the second nominal current contact piece 14 is performed in the direction of the second armature body 9. The first and the second armature body 8, 9 here remain still and each form the base for the movable parts, which are arranged on/in the first and second armature body 8, 9.
(15) A movement of the second nominal current contact piece 14 is also transmitted to the insulating nozzle 18. The insulating nozzle 18 is in turn coupled to a connecting rod 20, which transmits an axial movement of the insulating nozzle 18. Via its end facing away from the insulating nozzle 18, the connecting rod 20 is connected to a pivot element 21 of a second gearing. The pivot element 21 or rather the second gearing is mounted here in a stationary manner on the first armature body 8. In the present variant a pivot point (shaft bearing) of the pivot element 21 is for this purpose to be mounted on the first armature body 8 in a manner electrically insulated via an insulating body 22. The insulating body 22 is substantially conical, wherein it is arranged coaxially with the longitudinal axis 5. A pivot point of the pivot element 21 of the second gearing is arranged perpendicularly on the longitudinal axis 5. The connecting rod 20 is connected to a lever arm of the pivot element 21, such that a movement of the nominal current contact piece 14 in the direction of the longitudinal axis 5 can be converted via the insulating nozzle 18 and the connecting rod 20 attached to the insulating nozzle 18 into a pivot movement of the pivot element 21. The pivot element 21 has a slotted guide path 23, with which a pin engages. The pin, which engages with the slotted guide path 23, is oriented transversely to the longitudinal axis 5 and is displaceable in the direction of the longitudinal axis 5. The pin engaging with the slotted guide path 23 is connected here to a sleeve 24 of the first nominal current contact piece 13 at a fixed angle. The sleeve 24 forms a fixed-angle unit together with the first nominal current contact piece 13. It is thus possible to convert an axial movement of the second nominal current contact piece 14 via the connecting rod 20, the pivot element 21 and the slotted guide path 23 into a pivot movement and to convert this pivot movement in turn into a linear movement of the sleeve 24 or of the first nominal current contact piece 13. The second gearing with the pivot element 21 thus converts the linear movement starting from the second nominal current contact piece 14 into a linear movement with a reversed direction. Due to the shaping of the slotted guide path 23, this is associated with a gearing down of the movement, such that the oppositely directed movement, which is transmitted to the first nominal current contact piece 13, has a varying movement profile compared with the movement profile of the second nominal current contact piece 14.
(16) In order to assist the linear guidance of the sleeve 24 and of the first nominal current contact piece 13, the first armature body 8 is equipped with an auxiliary console 25. The auxiliary console 25 of the first armature body 8 forms a stationary counter bearing, similarly to the first armature body 8 itself. A linear slotted guide path 26 is arranged in the auxiliary console 25, which path is engaged by guide elements of the sleeve 24, such that the sleeve 24 is linearly displaceable. The guide elements may preferably be formed as pins, which protrude into the same slotted guide path 26 and are distanced from one another. Accordingly, the two pins constitute stops, such that the axial displaceability of the sleeve 24 (and therefore of the first nominal current contact piece 13) is limited.
(17) Two parallel sliding surfaces 27, 28 are arranged in the sleeve 24 and are oriented in opposite directions to one another and in line with the longitudinal axis 5. A hammerhead 29 of the first arcing contact piece 15 is arranged in the sleeve 24. The hammerhead 29 travels over the two sliding surfaces 27, 28 and guides the first arcing contact piece 15 jointly with the guide bush 16 and ensures a linear movement of the first arcing contact piece 15 along the longitudinal axis 5. In order to enforce a movement of the first arcing contact piece 15 relative to the first nominal current contact piece 13, a second gearing is provided. The second gearing is mounted on the first nominal current contact piece 13, in particular on the sleeve 24 of the second nominal current contact piece 14. There, a pivot point is attached, in which a pivot element in the form of a fork lever 30 can be moved. The fork lever 30 protrudes freely via its fork end into the space, wherein the fork end of the fork lever 30 is designed to engage with a stationary counter bearing 31. The fork end acts as a slotted guide path. The stationary counter bearing 31 is embodied in the form of a pin, which is attached to the auxiliary console 25 in a manner oriented perpendicularly to the longitudinal axis 5. The fork lever 30 is guided displaceably via its second end in a slot of the hammerhead 29. The slot of the hammerhead 29 is oriented here substantially transversely to the longitudinal axis 5, such that it is possible to compensate for an overstroke of the fork lever 30.
(18) A transfer of the switching device arrangement shown in FIG. 1 from its switch-off position (FIG. 1) into its switch-on position (FIG. 5) will be described hereinafter with reference to the sequence of FIGS. 1, 2, 3, 4 and 5. A movement of the second nominal current contact piece 14 or rather of the second arcing contact piece 17 is first performed by means of a drive apparatus (not illustrated in FIG. 1) in the direction of the first nominal current contact piece 13 and of the first arcing contact piece 15. During this movement the insulating nozzle 18 is also moved and transmits its linear movement via the connecting rod 20 to the pivot element 21 of the second gearing. A movement is transmitted to the first nominal current contact piece 13 via the pivot movement of the pivot element 21 of the second gearing. The insulating nozzle 18 thus bridges the clearance between contacts between the two contact sides 3, 4 in an electrically insulated manner and acts as an electrically insulating element in a kinematic chain, which serves to initiate a movement of the first nominal current contact piece 13. With a movement of the second nominal current contact piece 14 towards the first nominal current contact piece 13, the contacting speed is increased by the oppositely directed movement of the first nominal current contact piece 13. Since the annular coupling element 19 is connected to the insulating nozzle 18, the annular coupling element 19 is also moved with the insulating nozzle 18. Due to the rotatable mounting of the pivot element 30 on the first nominal current contact piece 13, the first gearing is also moved with the movement of the first nominal current contact piece 13. Here, the stationary counter bearing 31 located on the auxiliary console 25 slides in the form of a pin through the fork end of the fork lever 30. The fork lever 30 is moved past the stationary counter bearing 31 and in so doing is rerouted by the operative connection between stationary counter bearing 31 and the first gearing. Accordingly, on account of the connection of the fork lever 30 to the hammerhead 29 of the first arcing contact piece 13, the movement of the stationary counter bearing 31 relative to the first nominal current contact piece 13 is converted into a movement of the first arcing contact piece 15. On account of the displaceable mounting of the first gearing, the movement of the first arcing contact piece 15 superimposes the movement of the first nominal current contact piece 13, such that the speed of the movement of the first arcing contact piece 15 with respect to the base of the stationary counter bearing 31 or rather of the first armature body 8 or of the second armature body 9 is greater than the speed of the movement of the first nominal current contact piece 13.
(19) A progression of the movement of the second nominal current contact piece 14 and of the second arcing contact piece 17 is shown in FIG. 2. The insulating nozzle 18, via the connecting rod 20, has pushed the pivot element 21 around to such an extent that the first nominal current contact piece 13 has already moved out from its rest position. The stationary counter bearing 31 is engaged with the pivot element 30 of the first gearing. A movement of the first arcing contact piece 15 progresses, superimposing the movement of the first nominal current contact piece 13. FIG. 3 shows a further progression of the relative movement of the nominal current contact pieces 13, 14 and of the arcing contact pieces 15, 17. The fork lever 30 serving as pivot element is turned. The two arcing contact pieces 15, 16 have already contacted one another. Proceeding from the initial bringing of the two nominal current contact pieces 13, 14 toward one another, a leading contacting of the arcing contact pieces 15, 17 is ensured by a superimposition of the additional movement of the first arcing contact piece 15. Once the arcing contact pieces 15, 17 have been contacted, the relative movement, i.e. the bringing of the nominal current contact pieces 13, 14 toward one another, is continued. A further transmission of an additional movement to the first arcing contact piece 15 via the first gearing is no longer necessary, since the arcing contact pieces 15, 17 have already been contacted. The first gearing can be fixed in this position, such that the first arcing contact piece 15 cannot move unintentionally. The fork of the fork lever 30 acts as a slotted guide path. As the movement continues further, the counter movement of the first nominal current contact piece 13 is advanced further via the second gearing. FIG. 4 illustrates the moment at which the nominal current contact pieces 13, 14 contact one another. A further continuance of the movement of the nominal current contact pieces 13, 14 leads to a movement of the second gearing into an extended position. The pin of the counter bearing 31 still lies in the fork of the fork lever 30, such that the position of the first nominal current contact piece 13 is secured via the first gearing.
(20) FIGS. 6, 7, 8, 9 and 10 illustrate a second variant of a switching device arrangement. Apart from the embodiment of the first gearing, the mode of operation and the course of movement correspond to those described previously with reference to FIGS. 1 to 5. Only the deviating embodiment of the first gearing will therefore be discussed hereinafter.
(21) In the second variant an alternative embodiment of an auxiliary console 25a and of a sleeve 24a is provided. The sleeve 24a in accordance with the second variant is equipped with a bearing point, which lies outside the encasement of the sleeve 24a. An L-shaped lever 32 is mounted at this bearing point and has a first and a second lever arm. Via its first lever arm, which is longer than the second lever arm, the L-shaped lever is connected to a slot of the hammerhead 29 of the first arcing contact piece 15. In order to positively influence the transmission behavior of the first gearing, the second lever arm, which is shorter than the first lever arm of the L-shaped lever 32, is guided in a slotted guide path 33 of the auxiliary console 25a. For this purpose, the second lever arm is equipped with a pin, which protrudes into the slotted guide path 33 of the auxiliary console 25a. Here, the slotted glide path 33 is stepped, wherein a gradation occurs transversely to the longitudinal axis 5, such that, at the start of a movement of the first nominal current contact piece 13 (course of movement from FIG. 6 to FIG. 7), there is initially no transmission of an additional movement by the first gearing to the first arcing contact piece 15. As the step is passed, a movement of the first gearing on the stationary counter bearing (here the slotted guide path 33 of the auxiliary console 25a) is transmitted to the first arcing contact piece 15. Once the two arcing contact pieces 15, 17 have been contacted, the slotted guide path is formed in such a way that there is no further transmission of a movement via the L-shaped lever 32 of the first gearing. The first arcing contact piece 15 remains still relative to the first nominal current contact piece 13 and is moved together therewith. FIGS. 11 and 12 show a development of the second variant of a switching device arrangement, wherein the first gearing retains the use of an L shaped lever 32 (two-armed lever) and also of the auxiliary console 25a, wherein now, however, the embodiment of the second gearing varies. The insulating nozzle 18 is connected at a fixed angle to a first toothed rack 34. The first toothed rack 34 is guided linearly displaceably parallel to the longitudinal axis 5, such that a displacement of the insulating nozzle 18 is accompanied by a displacement of the first toothed rack 34. The linear movement of the first toothed rack 34 is converted into a pivot movement via a first gearwheel 35 of the stationary second gearing. The first gearwheel 35 or the shaft of the first gearwheel 35 is thus a pivot element. In order to transmit the movement, a second gearwheel 36 is provided, which has a reduced diameter compared with the diameter of the first gearwheel 35. The movement delivered from the first toothed rack 34 can thus be transmitted via a rigid coupling of the two gearwheels 35, 36. A second toothed rack 37 couples in a movement, picked up by the second gearwheel 36, at the first nominal current contact piece 13 or at a sleeve 24b of the first nominal current contact piece 13. The first and the second toothed rack 35, 37 are each engaged with the respective gearwheel 35, 36 in a diametrically opposed manner, such that the direction of movement of the insulating nozzle 13 or of the second arcing contact piece 17 or of the second nominal current contact piece 14 is reversed via the pivot element of the second gearing. In the third variant according to FIGS. 11 and 12, the L-shaped lever 32 is in turn used at the first gearing. However, the embodiment and use of a pivot element may be provided in an alternative form. By way of example, a fork lever 30, as in the first variant, can also be used in the third variant according to FIGS. 11 and 12.
(22) FIG. 13 shows a third variant of a switching device arrangement. By contrast with variants one, two and three according to FIGS. 1 to 12, however, the use of the insulating nozzle 18 as an electrically insulating element in a kinematic chain for driving the first nominal current contact piece 13 or the first arcing contact piece 15 is omitted here. Instead, a movement is already decoupled on the second contact side 4 via a second gearing, which has a pivot element 38, wherein the stationary base (second armature body 9) of the first contact side 3 and of the second contact side 4 (first armature body 8) can be used synonymously. A movement is coupled in at the second nominal current contact piece 14 and the second arcing contact piece 17. A linear movement is converted via the pivot element 38 of the second gearing into a rotary movement from the coupling-in point at the second arcing contact piece 17 and at the second nominal current contact piece 14. Due to the embodiment of the pivot element 38 as a two-armed lever, a movement coupled in at the first lever arm can be decoupled at the second lever arm in the opposite direction. An electrically insulating rod guided parallel to the longitudinal axis 5 and likewise mounted displaceably transmits the movement in parallel beside the interrupter unit within the encapsulating housing 1. The movement is coupled in at the first nominal current contact piece 13 via the electrically insulating rod. The first nominal current contact piece 13 and the rod coupled to the pivot element 38 are connected to one another at a fixed angle, such that the electrically insulating rod and the first nominal current contact piece 13 perform the same movement. The first nominal current contact piece 13 in turn has a sleeve 24c, in which the hammerhead 29 of the first arcing contact piece 15 is guided axially displaceably. An L-shaped lever 32a is supported rotatably on the sleeve 24c of the first nominal current contact piece 13. The L-shaped lever 32a is guided slidingly via its first lever arm in a slotted guide path 33a. The slotted guide path 33a forms a stationary counter bearing for the first gearing. The pivot element in the form of the L-shaped lever 32a is guided via its other lever arm in a slot of the hammerhead 29 of the first arcing contact piece 15. A movement of the first nominal current contact piece 13, which is transmitted via the pivot element 38 of the second gearing, leads to a movement of the pivot point of the pivot element 32a of the first gearing relative to the stationary counter bearing. The stationary counter bearing in the form of the slotted guide path 33a creates an operative connection between the stationary counter bearing and the first gearing. Here, the first armature body 8 can be understood to be a stationary counter bearing, wherein the first armature body 8 and the second armature body 9 are coupled to one another at a fixed angle and thus define the same stationary base. Similarly to the deflection of the L-shaped lever 32 known from variants two and three, the L-shaped lever 32a according to the fourth variant is operatively connected to the stationary counter bearing in the form of a slotted guide path 33a. The movement of the first nominal current contact piece 13 is superimposed by a movement of the arcing contact piece 15 driven additionally by the first gearing. As can be seen in FIG. 14, the slotted guide path 33a is provided at the end of a switching (on) movement with a course running substantially parallel to the longitudinal axis 5, such that there is no further transmission of a movement to the first arcing contact piece 15 in this dead-time element.
(23) In the fifth variant of a switching device arrangement shown in FIGS. 15 and 16, an alternative to the first gearings known from FIGS. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 and 14 is used. The fifth variant uses, for the first gearing, a lever arrangement having a two-armed lever 32b, which is part of a scissor gear. A scissor gear is a lever arrangement which has a plurality of levers coupled rotatably to one another, which axially displace points of articulation of the levers. The first gearing/the lever arrangement is connected in a stationary manner to the first contact side 3, in particular to the first nominal current contact piece 13. A two-armed lever 32b is shown in FIGS. 15 and 16, of which the central pivot point is guided axially displaceably in a slotted guide 33. The slotted guide 33 has a linear form and is oriented parallel to the movement axis of the first arcing contact piece 15. A central scissor of the scissor gear, which comprises the two-armed lever 32b, is coupled at the end to further levers, which define the central scissor. The end levers define the central scissor in the manner of toggle mechanisms. Two parallelograms are thus formed adjacently to the central scissor, which comprises the two-armed lever 32b, and can vary their inner angle with constant side lengths. Due to be crossed connection of levers within the scissor gear, a linear extension of the scissor gear is made possible. Here, a coupling point between levers of the scissor gear is mounted in a stationary manner/at a fixed angle with the first nominal current contact piece 13. This coupling point should lie on an axis of the linear path of displacement of the scissor gear. The coupling point mounted in a stationary manner is connected in a stationary manner to the first nominal current contact piece 13 of the first contact side 3. A parallelogram-like termination of the scissor gear at the end is positioned in a stationary manner on the first nominal current contact piece at the end on the side facing away from the first arcing contact piece 15. The first arcing contact piece 15 is connected to the scissor gear (to the parallelogram-like termination of the scissor gear facing toward the first arcing contact piece 15). The advantage of a construction of this type is that the first arcing contact piece 15 can be coupled to the scissor gear at a swivel joint since the scissor gear couples in a linear movement at the first arcing contact piece 15. The scissor gear is connected via the levers there in a stationary manner to the first nominal current contact piece 13 or to the first contact side 3. In order to actuate the scissor gear during the course of a movement of the first nominal current contact piece 13, at least one of the scissor elements (two-armed lever 32b) is guided in a control slotted guide 34, which is positioned in a stationary manner on an auxiliary console. Here, the auxiliary console remains unmoved, independently of a movement of the nominal current contact pieces 13, 14 and of the arcing contact pieces 15, 17. With a movement of the first contact side 3 or rather of the first nominal current contact piece 13, the scissor gear together with the levers of the scissor gear (due to the stationary mounting thereof in a stationary manner on the first nominal current contact piece 13) is also moved initially with the nominal current contact piece 13. Due to the control slotted guide 34, an extension of the scissor gear is enforced during the course of a switch-on movement, i.e. the first arcing contact piece 15 is moved from a separated position into a contacting position. Conversely, when the arcing contact pieces 15, 17 or the nominal current contact pieces 13, 14 are distanced, the extension of the scissor gear is reversed. Proceeding from the movement (switch-on or switch-off movement) of the first nominal current contact piece 13, an additional movement at increased speed is enforced at the first arcing contact piece 15. The control slotted guide 34 is for this purpose oriented substantially in line with the movement axis of the first arcing contact piece 15 and runs in a manner reducing the distance between the movement axis, at least in portions, dropping in the direction of the movement axis of the first nominal current contact piece 15. A lever 32a of the scissor gear travels through the control slotted guide, such that the traveling articulation point is displaced in the control slotted guide 34 transversely to the linear displacement axis of the first arcing contact piece 15 and a pivoting of the lever 32a is enforced. Due to the transverse displacement, the scissor gear is extended/contracted, wherein articulation points (scissor articulations) are displaced linearly. Articulation points (outer articulations) on the levers of the scissor gear movable transversely to the longitudinal axis 5 are moved in the axial direction and additionally transversely to the longitudinal axis 5. In FIG. 15 the fifth variant of a switching device arrangement is shown in the switch-on position, i.e. the arcing contact pieces 15, 17 contact one another. The nominal current contact pieces 13, 14 also contact one another. The first gearing, here in the form of a scissor gear, is in an extended position. In a switch-off position according to FIG. 16 the first gearing is in a contracted position, such that the nominal current contact pieces 13, 14 and also the arcing contact pieces 15, 17 are separated from one another. When passing from a switch-on position (FIG. 15) into a switch-off position (FIG. 16), a movement is transmitted via an insulating nozzle 18 to a second gearing. The second gearing corresponds to the second gearing of the third variant illustrated in FIGS. 11 and 12. The second gearing drives the first nominal current contact piece 13. The first gearing mounted in a stationary manner on the first nominal current contact piece 13 is also moved with the first nominal current contact piece 13. By means of a relative movement between the auxiliary console and the control slotted guide 34 located thereon, an extension or contraction of the scissor gear/first gearing is enforced depending on the direction of movement of the first nominal current contact piece 3. The control slotted guide 34 serves here as a stationary counter bearing. The scissor gear/a control element of the first gearing is coupled to the stationary counter bearing.
(24) Similarly to the above exemplary embodiments, it should also be noted here that the first gearing and the second gearing according to the fifth variant can also be used in the further variants 1, 2, 3 and 4, such that different embodiments of the first gearing and also different embodiments of the second gearing can be combined with one another arbitrarily.
