Switching arrangement

Abstract

A switching configuration includes a first switching contact set having a rated current contact piece and an arcing contact piece. The arcing contact piece and the rated current contact piece of the first switching contact set are movable relative to one another through a transmission mechanism. The arcing contact piece is supported by a support element on a contact carrier of the rated current contact piece. The transmission mechanism has a transmission mechanism chassis which is supported, particularly directly, on the contact carrier.

Claims

1. A switching configuration, comprising: a first switching contact set having a rated current contact piece and an arcing contact piece being movable relative to one another; said rated current contact piece having a contact carrier with a cavity having an orifice opening, said arcing contact piece protruding into said cavity; a supporting element supporting said arcing contact piece on said contact carrier; and a transmission mechanism generating a relative movement between said arcing contact piece and said rated current contact piece, said transmission mechanism having a transmission mechanism chassis supported on said contact carrier; said transmission mechanism chassis having at least one bearing flank supported directly on and fixed to said contact carrier, said at least one bearing flank spanning said supporting element at a spacing, and said at least one bearing flank including a transverse crosspiece spanning and extending over said orifice opening.

2. The switching configuration according to claim 1, wherein: said contact carrier is substantially cylindrical; said at least one bearing flank includes first and second bearing flanks having front end faces supported on said substantially cylindrical contact carrier; and said transmission mechanism has moving parts received by a recess formed between said bearing flanks.

3. The switching configuration according to claim 1, wherein: said at least one bearing flank includes a plurality of bearing flanks; a guiding track is disposed on at least one of said bearing flanks; and a follower element follows said guiding track and is guided by said guiding track.

4. The switching configuration according to claim 1, wherein said at least one bearing flank includes a plurality of bearing flanks having a recess formed therebetween, and a guiding track for guiding said arcing contact piece is disposed in said recess.

5. The switching configuration according to claim 1, wherein a movable field control electrode is guided on said at least one bearing flank.

6. The switching configuration according to claim 1, wherein said at least one bearing flank includes a plurality of bearing flanks extending beyond said transverse crosspiece and beyond said contact carrier.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

(1) An exemplary embodiment of the invention is illustrated schematically herein under in a drawing and subsequently further described. In the drawings

(2) FIG. 1 illustrates a detail of a switching arrangement,

(3) FIG. 2 illustrates a first and also a second switching contact set of the switching arrangement that is disclosed in FIG. 1,

(4) FIG. 3 illustrates a perspective view of the first switching contact set having bearing flanks that are supported on a contact carrier.

DESCRIPTION OF THE INVENTION

(5) FIG. 1 illustrates a detail of a switching arrangement in the form of a high voltage circuit breaker. The switching arrangement comprises a fluid-tight encapsulating housing 1. The fluid-tight encapsulating housing 1 is in this case embodied as a pressure vessel that is filled in its interior with an electrically insulating fluid, preferably an electrically insulating gas such as sulfur hexafluoride. The fluid that is received within the encapsulating housing 1 is placed under excess pressure. Accordingly, in the assembled state, the interior of the encapsulating housing 1 is hermetically sealed. Furthermore, an interrupter unit of the switching arrangement is arranged within the encapsulating housing 1. In this case, the circuit breaker unit comprises a first switching contact set 3 and also a second switching contact set 4. The first and the second switching contact set 3, 4 are supported in each case by way of an insulating support 2a, 2b on ends that are remote from one another on the inner peripheral face of the encapsulating housing 1. The first switching contact set 3 comprises a first contact carrier 5. The second switching contact set 4 comprises a second contact carrier 6. A first rated current contact piece 7 of the first switching contact set 3 is supported by way of the first contact carrier 5. A second rated current contact piece 8 of the second switching contact set 4 is positioned on the second contact carrier 6. Furthermore, a first arcing contact piece 9 of the first switching contact set 3 is positioned on the first contact carrier 5. Furthermore, a second arcing contact piece of the second switching contact set 4 is positioned on the second contact carrier 6. The contact pieces of the switching contact sets 3, 4 are arranged coaxially with respect to one another.

(6) A contact element 11a, 11b is connected in an electrically conductive manner in each case to the first contact carrier 5 and also to the second contact carrier 6 and said contact elements render it possible to contact and integrate the switching contact sets 3, 4 of the contact carriers 5, 6 of the switching arrangement into a current path so that it is possible to switch in or alternatively switch out the current path by means of the switching arrangement. In this case, the two contact elements 11a, 11b of the first and the second contact carrier 5, 6 are arranged in each case on the outer peripheral face of an essentially hollow cylindrical shield bodies. The second contact carrier 6 is essentially embodied in a hollow cylindrical manner and at least in part surrounded by a hollow cylindrical shield body that supports a contact element 11b. The first contact carrier 5 is embodied in an essentially hollow cylindrical manner and is at least in part surrounded by a hollow cylindrical shield body that supports a contact element 11a.

(7) The hollow cylindrical shield body is used as a shielding cap in order to shield the contours of the contact carrier 5, 6 in a dielectric manner and also to connect connecting lines by way of the contact elements 11a, 11b. Connecting lines can be inserted into the interior of the encapsulating housing 1 by way of flanges 12a, 12b that are arranged on the encapsulating housing 1. The connecting lines that are to be inserted can be sealed on the flanges 12a, 12b in a fluid-tight manner and can be inserted into the interior of the encapsulating housing 1 in an electrically insulated manner so that it is rendered possible to close the interior of the encapsulating housing 1 in a hermetically sealed manner. By way of example, exterior bushings can be attached to the flanges 12a, 12b for the purpose of inserting connecting lines. A current path to the switching contact sets 3, 4 is embodied from the respective contact elements 11a, 11b by way of the respective shield body and the respective contact carrier 5, 6.

(8) The two contact carriers 5, 6 are constructed in an essentially hollow cylindrical manner, wherein the two contact carriers 5, 6 are essentially embodied with a circular cross section and are arranged with their front end faces lying opposite one another in a coaxial manner. Accordingly, the front end faces of the rated current contact pieces 7, 8 and also the arcing contact pieces 9, 10 of the two switching contact sets 3, 4 lie in the region of a clearance between open contacts. In this case, the second rated current contact piece 8 is constructed in a hollow cylindrical tubular manner. The first rated current contact piece 7 is embodied in the form of a bushing. As contact is made, the second rated current contact piece 8 can travel into the first rated current contact piece 7. The first arcing contact piece 9 is embodied in the form of a pin, wherein the second arcing contact piece 10 is constructed in the form of a bushing and is provided with resilient contact fingers so that the second arcing contact piece 10 can move over the outer peripheral face of the pin-shaped first arcing contact piece 9 in the switched-on state. The second arcing contact piece 10 and also the second rated current contact piece 8 are arranged coaxially with respect to one another, wherein the second arcing contact piece 10 is surrounded on its outer peripheral face by the second rated current contact piece 8, wherein the second rated current contact piece 8 is in turn encompassed on its outer peripheral face by the hollow cylinder shield body that supports a contact element 11b. The second rated current contact piece 8 and also the second arcing contact piece 10 are permanently contacted to one another in a galvanic manner so that these two contact pieces 8, 10 are permanently at the same electrical potential. The second rated current contact piece 8 and also the second arcing contact piece 10 are connected to one another in an angular rigid manner. The second rated current contact piece 8 is mounted within the hollow chamber of the hollow cylindrical shield body in such a manner that it can be axially displaced in a sliding manner and is connected to the hollow cylindrical shield body in an electrically conductive manner.

(9) It is possible, by way of a drive device (not illustrated) that is located outside the encapsulating housing 1, to transfer a switching movement initially to the second rated current contact piece 8 and the second arcing contact piece 10 while using a kinematic chain. For this purpose, a drive rod 13 is provided within the kinematic chain. The drive rod 13 is arranged by way of example in such a manner that it can be displaced in a linear manner, wherein the switching rod 13 is guided in a fluid-tight manner through the encapsulating housing 1. A linear movement of the second rated current contact piece 8 and the second arcing contact piece 10 can be initiated by way of the switching rod 13. Furthermore, an insulating material nozzle 14 is provided that is connected in an angular rigid manner to the second rated current contact piece 8 and also to the second arcing contact piece 10. The insulating material nozzle 14 extends through the clearance between open contacts of the switching arrangement and protrudes in the direction of the first switching contact set 3. The insulating material nozzle 14 can be axially displaced together with the second rated current contact piece 8 and also with the second arcing contact piece 10. A drive rod 15a, 15b of a transmission mechanism is connected to the insulating material nozzle 14. The transmission mechanism is used to transfer a movement of the insulating material nozzle 14 or rather of the second rated current contact piece 8 and also of the second arcing contact piece 10 to the first arcing contact piece 9, wherein the linear movement of the insulating material nozzle 14 is reversed in terms of its direction by means of the transmission mechanism and is transferred to the first arcing contact piece 9. It is intended to use for this purpose a fixedly-mounted two-armed lever 16 that on the one hand can be driven by way of a pin 17 that is located on a drive rod 15a and on the other hand can output a movement to an elongated hole that extends transversely with respect to the direction of movement of the first arcing contact piece 9.

(10) The construction of the transmission mechanism is further evident in FIG. 2. The first switching contact set 3 and also the second switching contact set 4 are illustrated in this figure.

(11) The pin 17 that is fastened to a drive rod 15a that is mounted in such a manner that it can move with respect to the contact carrier 5 can engage in a first lever arm of the two-armed lever 16. The pin 17 moves during a switching movement into an open fork of the first lever arm of the two armed lever 16 and pivots the two-armed lever 16 about its fixedly-mounted bearing. A second lever arm of the two-armed lever 16 engages in an elongated hole 18 of the first arcing contact piece 9. As a result of the design of an elongated hole 18, it is possible to allow a pin of the two armed lever 16, said pin being coupled to the second lever arm and the arcing contact piece 9, to engage in the elongated hole 18 and thus to compensate for an over-stroke of the lever 16 and to render possible a linear movement of the first arcing contact piece 9. Consequently, it is possible that a movement of the insulating material nozzle 14 by way of a deflection transmission mechanism, in particular by way of the two-armed lever 16, is transformed into a linear movement of the first arcing contact piece 9, said linear movement being directed in the opposite direction with respect to the second switching contact set 4.

(12) The arcing contact piece 9 is mounted in a supporting element 19. The supporting element 19 extends along a diameter within a cavity of the first contact carrier 5 and is embodied in accordance with a type of a connecting piece that extends from the inner peripheral face to the inner peripheral face of the cavity. A bushing is provided in a central area and the first arcing contact piece 9 is mounted within said bushing in such a manner that it can be displaced in an axial manner. The supporting element 19 is connected in an electrically conductive manner to the first contact carrier 5 and also is permanently connected to the first arcing contact piece 9 in an electrically conductive manner by way of a sliding contact arrangement. A transmission mechanism head 20 of the first arcing contact piece 9, in which the elongated hole 18 is arranged, is arranged on the end of the first arcing contact piece 9 that is remote from the second arcing contact piece 10. The transmission mechanism head 20 is guided in groove-shaped guiding tracks 21a, 21b that are aligned opposite one another in such a manner that said transmission mechanism head can be displaced in a linear manner. The transmission mechanism head 20 acts as a follower element of the guiding tracks 21a, 21b. The guiding tracks 21a, 21b are embodied in each case as grooves so that, by way of a transverse guiding arrangement of the transmission mechanism head 20 and therefore in cooperation with the bushing of the supporting element 19, a rotationally secured linear guiding arrangement of the first arcing contact piece 9 is provided by way of the associated groove flanks of the guiding tracks 21a, 21b.

(13) Furthermore, coupling elements 22a, 22b are arranged on the drive rods 15a, 15b. The coupling elements 22a, 22b connect the drive rods 15a, 15b in a pivotable manner to drive pins 23 and said driving rods are mounted in guiding tracks 24a, 24b in such a manner that they can be displaced. The guiding tracks 24a, 24b are embodied as connecting links (the recesses that run through the bearing flanks) that are integrated into bearing flanks 25a, 25b. The two bearing flanks 25a, 25b (as a result of the cut-away view only one bearing flank 25b is visible in FIG. 2) are embodied in a diametrically opposed manner. The bearing flanks 25a, 25b are used as a transmission mechanism chassis of the transmission mechanism to position by way of example the point of rotation of the two-armed lever 16, to guide the drive rods 15a, 15b in a linear direction, to position the guiding tracks 21a, 21b, 24a, 24b and to direct and guide the transmission mechanism head 20 of the first arcing contact piece 9. Moving parts of the transmission mechanism are arranged within a recess between the two bearing flanks 25a, 25b that complement one another. The bearing flanks 25a, 25b are part of an open transmission mechanism chassis. Both the first bearing flank 25a and also the second bearing flank 25b are screwed on their front end faces to the first contact carrier 5 (see arrow 26). For this purpose, the bearing flanks 25a, 25b comprise in each case a transverse crosspiece that extends over an issuing opening of the cavity of the first contact carrier 5 and render it possible to support the bearing flanks 25a, 25b and also the transmission mechanism directly on the first contact carrier 5 in such a manner that it is spaced to the supporting element 19.

(14) By way of the drive pins 23 that are guided in the guiding tracks 24a, 24b in a displaceable manner, in the case of movement of the drive rods 15a, 15b a lug 27 performs a synchronized movement therewith and the drive pins 23 are mounted in said lug in a displaceable manner in a transverse direction with respect to the movement direction of the insulating material nozzle 14. Accordingly, a movement of the drive rods 15a, 15b can be transferred to holding arms 28 that are attached to the lug 27, and a field control electrode 29 is arranged on said holding arms. Consequently, it is possible to transfer a movement of the drive rods 15a, 15b to the holding arms 28 in order to bring about a movement of the field control electrode 29. The guiding tracks 24a, 24b are in part embodied in a curved manner transverse with respect to the movement axis of the insulating material nozzle 14 so that a dead-time element is formed that brings about a temporal delay of the transfer of movement of the drive rods 15a, 15b to the holding arms 28 of the field control electrode. Consequently, it is possible to effect a movement of the second rated current contact piece 8 and also of the second arcing contact piece 10 and also of the insulating material nozzle 14, wherein initially both the field control electrode 29 and also the first arcing contact piece 9 remain idle and only in the case of a preceding movement of the insulating material nozzle 14 along with the second rated current contact piece 8 and second arcing contact piece 10 does the pin 17 move into the fork end of the two-armed lever 16 and a movement of the first arcing contact piece 9 occurs, wherein depending upon the position of the guiding tracks 24a, 24b for the drive pins 23, a lead or a temporal offset/a delay of a movement in the opposite direction of the field control electrode 29 occurs. The field control electrode 29 is moved out of the first rated current contact piece 7 so that in the region in which in the switched off state (cf. FIG. 2) the field control electrode 29 is idle, the second rated current contact piece 8 can now be moved in order to contact the two rated current contact pieces 7, 8 in a galvanic manner.

(15) FIG. 3 illustrates a perspective view of the end of the first contact carrier 5 that is remote from the second switching contact set 4. The supporting element 19 that is embodied in a connecting piece like manner is evident within a cavity of the first contact carrier 5 and said supporting element is pushed through in a central region (arrow 30) of the first arcing contact piece 9 that is not illustrated in FIG. 3. The supporting element 19 is spanned by the bearing flanks 25a, 25b that are connected on their front end faces to the first switching contact carrier 5. The bearing flanks 25a, 25b comprise a transverse crosspiece on their end that is facing the first contact carrier 5 in order to attach supporting feet to the front end face of the first contact carrier 5. The supporting feet are screwed to the first contact carrier 5, wherein the bearing flanks 25a, 25b extend over the issuing opening of the cavity into which protrudes the first arcing contact piece 9. A recess is formed between the bearing flanks 25a, 25b and the two armed lever 16 is mounted in said recess and the guiding tracks 21a, 21b are also arranged in the recess for the transmission mechanism head 20 of the first arcing contact piece 9. The bearing flanks 25a, 25b consequently form a transmission mechanism chassis for the transmission mechanism, wherein moving parts of the transmission mechanism are held within a recess between the bearing flanks 25a, 25b.