DE102017214607A1 - Bearing device for supporting a moving contact on an electrical component for a circuit breaker, circuit breaker and switchgear - Google Patents

Abstract

The invention relates to a bearing device (22) for supporting a moving contact (16) on an electrical component (12) for a circuit breaker (10) with at least one guide element which can be fastened to the component (12) for guiding the moving contact (16) in its linear position Movements relative to the component (12), wherein the guide element is formed as a membrane (24) which is formed as an electrical conductor and electrically connectable to the moving contact (16) and at least two membrane elements (28) arranged one above the other and at least one between the membrane elements ( 28) arranged spacer element (30).

Description

The invention relates to a bearing device for supporting a moving contact on an electrical component for a circuit breaker according to the preamble of claim 1 and a circuit breaker according to the preamble of claim 13. Furthermore, the invention relates to a switchgear.

From the general state of the art, storage facilities for storing respective moving contacts on respective electrical components for respective circuit breakers and circuit breakers, each having at least one such storage facility, are already well known. The circuit breaker comprises, for example, the electrical component and at least one fixed contact fixed to the component. In addition, the circuit breaker usually has said moving contact, which is also commonly referred to as a moving contact or moving contact. The moving contact is relative to the component and relative to the fixed contact between at least one contacting position of at least one also called interruption position separating position linearly or translationally movable. In the contacting position of the moving contact with the fixed contact is electrically connected, for example, by the moving contact touches the fixed contact. In the interruption position, however, the moving contact is electrically disconnected from the fixed contact.

The respective circuit breaker further comprises the respective bearing device, via which the moving contact is mounted linearly movably on the electrical component. In this case, the bearing device has at least one guide element fastened to the component, by means of which the moving contact is guided when the moving contact is moved linearly relative to the component.

Object of the present invention is to provide a storage facility, a circuit breaker and a switchgear, so that the moving contact can be stored in a particularly simple and advantageous manner.

This object is achieved by a storage device with the features of claim 1, by a circuit breaker with the features of claim 13 and by a switchgear with the features of claim 15. Advantageous embodiments with expedient developments of the invention are specified in the remaining claims.

A first aspect of the invention relates to a bearing device for supporting a moving contact on an electrical component for a circuit breaker. The moving contact is usually also referred to as a moving contact or moving contact. The bearing device has at least one fastened to the electrical component or fixed guide element for guiding the moving contact in its linear movements relative to the device. In other words, the moving contact, if it is moved linearly or translationally relative to the component, is guided by means of the guide element.

In order to be able to store the moving contact in a particularly advantageous and particularly simple manner, it is inventively provided that the guide element is formed as a membrane, which in turn is designed as an electrical conductor. Thus, the membrane is electrically conductive or designed to be traversed by electric current, so that electrical power can be transmitted by means of the membrane. The membrane is electrically connected or connected to the moving contact. Furthermore, the membrane has at least two membrane elements arranged one above the other and at least one spacer element arranged between the membrane elements, by means of which the membrane elements are held at a distance from one another. In particular, it is conceivable that the membrane has a plurality of spacer elements and a plurality of superimposed membrane elements whose number is greater than 2, wherein the membrane elements and the spacer elements are arranged one above the other and stacked, in particular such that the membrane elements and the spacer elements alternately one above the other are arranged or stacked. It is provided in particular that, for example, between exactly two of the membrane elements exactly one of the spacer elements is arranged. In particular, it is further provided that the at least one spacer element, the at least two membrane elements, between which the at least one spacer element is arranged, directly touched or contacted.

The moving contact is linearly or translationally movable, for example, stored or stored on the electrical component by mediation of the membrane, so that, for example, the membrane moves in translational relative movements between the moving contact and the electrical component at least partially with the moving contact. This results in particular in elastic deformations of the membrane. In other words, the membrane is at least partially, for example elastically deformable and moves in translational relative movements between the moving contact and the electrical component, for example, with the moving contact, whereby the membrane deforms elastically.

The membrane thereby enables a robust and thus durable mounting of the moving contact on the electrical component, wherein the membrane permits desired linear or translational relative movements between the moving contact and the electrical component in an advantageous manner. At the same time, the membrane can be used as an electrical contact element or as an electrical transmission element for transmitting electrical current, since the membrane is designed as an electrical conductor. The membrane thus has a dual function, since the membrane is used on the one hand for supporting or guiding the moving contact. On the other hand, the membrane is used, for example, to transmit electrical current from the moving contact, for example, to at least one component different from the moving contact and the component, such as a so-called installation and / or vice versa, so that the moving contact via the membrane is particularly advantageously electrically connected to the installation can be.

The invention is based in particular on the following knowledge: In switchgear, in particular in medium-voltage switchgear, usually at least one electrical component in the form of a vacuum tube is used, which has at least two electrical contacts. The two contacts provide a connection for electrical contact. The contacts are also referred to as contact elements and must be able to conduct, for example, electrical currents of several hundred amperes. Corresponding connection points of a network-side installation are usually realized as mechanically fixed points in the form of copper bars or rigid cables.

The vacuum tube has, for example, the aforementioned moving contact and at least one fixed contact, which is fixed to a fixed contact element and thereby, for example, on the vacuum tube simply referred to as a tube. For this fixed contact element in the form of the fixed contact, a connection of the fixed contact with the insulation can be realized, for example, simply by means of a screw connection. The moving contact is a second contact element, which can realize a physical separation in the form of a gap between the fixed contact and the moving contact via a connection to the installation or to a switching unit. For this purpose, for example, the moving contact is translational or linear relative to the fixed contact and in particular relative to the vacuum tube, which is for example the aforementioned electrical component, between at least one contacting position and at least one separation position movable. In the contacting position, the moving contact is electrically connected to the fixed contact, wherein, for example, the moving contact touches the fixed contact, in particular directly. In the disconnected position, for example, the moving contact is electrically separated from the fixed contact, in particular via the aforementioned gap. For example, to avoid excessive, resulting from a movement of the moving contact from the contacting position in the disconnected position arcs, such arcs are extinguished in the vacuum tube.

The moving contact is deflected for example at speeds of several meters per second by several millimeters and thereby moved between the contacting position and the disconnected position, in particular linear or translational. Accordingly, between the moving contact and the fixed connection point of the installation to provide a connecting element, which on the one hand carry the currents occurring or transmitted from the moving contact to the installation and accelerations that occur when moving the Bewegkontakts, permanently transmitted.

In order not to affect the dynamics of the moving contact as possible, so that the moving contact can be moved very quickly, the connecting element should ideally as low as possible rigidity, in particular along a direction of movement along which the moving contact linear or translational relative to the electrical component and relative to the fixed contact is movable, and have the lowest possible attenuation or a low mechanical friction and the smallest possible moving mass. These mechanical requirements are usually in contrast to the requirement for the lowest possible electrical resistance of the connecting element in order to realize a particularly advantageous power transmission can. This contrast results from the fact that the electrical resistance of a solid is proportional to its length and indirectly proportional to its cross-section. In mechanical stiffness, these two quantities are exactly in the reverse manner, that is proportional to the cross-sectional area and indirectly proportional to the length, whereby the design of the connecting element is always a compromise between these two targets. In addition, usually such fasteners be designed in terms of their property for several thousand cycles.

Conventionally, a stacked copper tape is used as the connector. The stacked copper tape includes, for example, stacked copper-formed single tapes having a thickness of, for example, 0.1 millimeter or less, the single tapes being connected together at their ends, in particular by welding or pressing, to form a stacking element in the form of the stacked copper tape. The individual strips are mounted so that the connection point to the vacuum tube or to the electrical component and the fixed connection point of the installation are at right angles to each other. The deflection of the moving contact is compensated accordingly by a change in the bending radius of the copper strip. Each individual belt is able to perform this movement or deformation over the required number of cycles. The stack of the many thin individual bands in this case has a significantly lower mechanical modulus of resistance against the deflection than a single band with equivalent cross-sectional area, since the thickness of the band is square in the surface support element. Due to the stacking of the individual bands, the per se too high individual resistances of the individual strips are connected in parallel, whereby the total resistance of the copper strip can be kept low.

From the practical application of the copper bands, however, it is known that the friction between the individual bands and their moving mass negatively influence the dynamic behavior or can lead to undesirable non-linear effects.

The aforementioned problems or disadvantages can be avoided by means of the bearing device according to the invention, since the membrane in the axial direction or along the direction of movement has a low rigidity. However, the membrane has a high lateral rigidity. In other words, the membrane along a direction perpendicular to the direction of movement direction has a particularly high rigidity, in particular in a plane which is perpendicular to the direction of movement of the moving contact and thus the membrane.

The direction of movement of the moving contact coincides, for example, with the axial direction of the membrane, so that the direction of movement is also referred to, for example, as the axial direction. The aforementioned direction, which is perpendicular to the direction of movement coincides, for example, with the radial direction of the membrane.

The idea underlying the invention is now to design the guide element in the form of the membrane so that the membrane next to the leadership of the trained, for example, as a plunger or such a plunger moving contact also takes on the task of a current guide. In this way, for example, electrical current can be conducted from the installation via the membrane to the plunger or to the moving contact and / or vice versa. The desire for this dual function of the membrane initially leads to contradictory requirements. For low axial stiffness, the membrane should have only a small thickness. However, in order to carry or carry electrical currents of several hundred amperes, the thickness of the membrane should not fall below a certain minimum thickness.

However, these contradictory requirements can now be solved in that the membrane or the guide element has a stacked structure or a stacked arrangement, in particular a stacked membrane arrangement, in which or the membrane elements and the spacer element are arranged one above the other and thus stacked , In this way, the moving contact can be stored particularly advantageous, wherein the membrane can transmit particularly advantageous even high electrical currents. The membrane element and the spacer element are preferably formed as separate from each other formed components.

It has proven to be particularly advantageous if the membrane has at least one terminal lug via which the membrane is electrically connectable to at least one contact element provided outside the component, in particular the said installation. The terminal lug projects, for example, in particular in the radial direction of the membrane from a basic body of the membrane, so that the membrane can be connected to the contact element in a particularly advantageous manner.

Another embodiment is characterized in that the terminal lug is formed by respective, arranged in mutual overlap flag portions of the membrane elements and the spacer element. As a result, particularly high electrical currents can be transmitted in an advantageous manner, wherein at the same time a particularly advantageous and dynamic storage can be realized.

In a further embodiment of the invention, the membrane elements and the Spacer element formed as a respective electrical conductor, so that, for example, electrical currents can be transmitted through the membrane elements and the spacer element itself. As a result, the number of parts and thus the weight and the cost of the membrane can be kept particularly low, so that a highly dynamic storage of the moving contact can be realized. As a result, the moving contact can be moved particularly quickly between the contacting position and the disconnected position.

Furthermore, it has proven particularly advantageous if the membrane elements and the spacer element are formed from the same material. In this way, a particularly advantageous and in particular low-resistance transmission of electrical currents can be ensured.

In a particularly advantageous embodiment of the invention, the respective membrane element and the spacer element each have a passage opening for at least partially receiving the moving contact. In other words, for example, the moving contact or the aforementioned plunger is at least partially received in the respective passage openings, whereby the moving contact can be particularly advantageous, in particular directly, connected to the membrane and stored highly dynamically over the membrane. In addition, a particularly advantageous electrical connection between the moving contact and the membrane can be ensured thereby. In this case, the passage openings are arranged in mutual overlap, so that the moving contact or the plunger, for example, particularly simple, especially in the axial direction of the membrane, inserted into the respective passage openings or can be inserted therethrough.

Another embodiment is characterized in that the respective passage opening is at least predominantly circular and has a respective circumference. In this case, the circumference of the passage opening of the respective membrane element is smaller than the circumference of the passage opening of the spacer element. In this way, for example, the actual storage of the moving contact on the membrane elements, which deform for example, thereby particularly advantageous elastic and thereby move with movements of the moving contact with these, so that the membrane elements are held by means of the spacer element in a particularly advantageous distance from each other. Thus, in particular, the membrane elements fulfill an actual supporting function for carrying and supporting the moving contact, wherein such a supporting function does not or only very slightly belongs to the spacer element.

In order to bind the moving contact particularly advantageously and thus highly dynamically to the membrane and thus to be able to support it via the membrane, it is provided in a further embodiment of the invention that at least one of the membrane elements and / or the spacer element has at least one projection projecting into the passage opening. The projection has, for example, a non-circular outer contour and can thus be used, for example, as a form-locking element in order to avoid undesired rotations of the moving contact relative to the membrane. Further, for example, the fact that the projection engages in a completely produced state of the circuit breaker in a corresponding recess of the plunger, a clear and defined alignment of the moving contact or the plunger are ensured relative to the membrane. For example, the projection has an at least substantially angular outer contour.

In order to realize a particularly advantageous and in particular highly dynamic mounting of the moving contact, it is provided in a further embodiment of the invention that at least one of the membrane elements, in particular both membrane elements, and / or the spacer element is slotted, whereby the at least one membrane element or the spacer element a Having a plurality of slots. The slots allow, for example, a particularly advantageous, in particular elastic, deformability of the membrane element or of the spacer element, so that the moving contact can be moved highly dynamically, that is to say at particularly high speeds between the contacting position and the disconnected position.

The slots are arranged in particular in a different area from the respective passage opening and from the respective terminal lug. This region is, for example, an annular region, to which, in particular in the radial direction of the membrane, inwardly, for example, the passage opening and, in particular in the radial outward direction, the connection lug adjoins.

In order to realize a particularly advantageous deformability of the membrane, the slots run, for example, in a straight line, in particular in the radial direction of the membrane, or arcuate, in particular involute.

In a further embodiment of the invention, the respective membrane element on the outer peripheral side is at least predominantly, that is to more than Half formed circular, so that a particularly advantageous and especially dynamic storage can be displayed.

Finally, it has proven to be particularly advantageous if the spacer element is formed on the outer peripheral side at least predominantly circular, whereby a particularly advantageous storage can be realized.

A second aspect of the invention relates to a circuit breaker, in particular for a switchgear and preferably for a medium-voltage switchgear. The circuit breaker comprises at least one electrical component, at least one fixed contact fixed to the component and at least one moving contact which is linearly or translatorily movable relative to the component and relative to the fixed contact between at least one contacting position and at least one disconnected position. In the contacting position of the moving contact with the fixed contact is electrically connected by, for example, the moving contact touches the fixed contact, in particular directly. In the disconnected position of the moving contact is electrically separated from the fixed contact, since, for example, in the disconnected position, a gap between the moving contact and the fixed contact is greater than in the contacting position.

The circuit breaker according to the invention further comprises a bearing device, in particular a bearing device according to the first aspect of the invention, via which the moving contact is mounted linearly or translationally movable on the electrical component. In this case, the bearing device has at least one guide element fastened to the component for guiding the moving contact in its linear movements relative to the component. The preceding and following statements on the bearing device according to the first aspect of the invention are readily applicable to the second aspect of the invention and vice versa.

In order to realize a particularly advantageous mounting of the moving contact, it is provided according to the invention in the second aspect of the invention that the guide element is designed as a membrane, which is designed as an electrical conductor and is electrically connected to the moving contact. In this case, the membrane has at least two membrane elements arranged one above the other or one above the other and at least one spacer element arranged between the membrane elements, by means of which the membrane elements are held at a distance from one another. Advantages and advantageous embodiments of the first aspect of the invention are to be regarded as advantages and advantageous embodiments of the second aspect of the invention, and vice versa.

In a particularly advantageous embodiment of the invention, the electrical component is designed as a vacuum tube, in which the fixed contact and the moving contact are arranged.

The membrane is arranged, for example, partially in the vacuum tube and partially outside the vacuum tube in order to be able to transmit electrical currents, for example via the membrane, between the moving contact and an installation arranged outside the vacuum tube.

A third aspect of the invention relates to a switchgear, in particular a medium-voltage switchgear, which has at least one bearing device according to the first aspect of the invention and / or at least one circuit breaker according to the second aspect of the invention. Advantages and advantageous embodiments of the first aspect and the second aspect of the invention are to be regarded as advantages and advantageous embodiments of the third aspect of the invention and vice versa.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawing. The features and feature combinations mentioned above in the description as well as the features and feature combinations mentioned below in the description of the figures and / or in the figures alone can be used not only in the respectively specified combination but also in other combinations or in isolation, without the scope of To leave invention.

• 1 ausschnittsweise eine schematische und geschnittene Perspektivansicht eines Leistungsschalters für eine vorzugsweise als Mittelspannungsschaltanlage ausgebildete Schaltanlage, mit einer erfindungsgemäßen Membran gemäß einer ersten Ausführungsform;
• 2 ausschnittsweise eine schematische Schnittansicht der Membran;
• 3 ausschnittsweise eine weitere schematische Schnittansicht der Membran;
• 4 eine schematische Draufsicht eines Membranelements der Membran gemäß einer zweiten Ausführungsform;
• 5 eine schematische Draufsicht eines Abstandshalteelements der Membran;
• 6 eine schematische Draufsicht des Membranelements der Membran gemäß einer dritten Ausführungsform;
• 7 eine schematische Draufsicht des Membranelements der Membran gemäß der ersten Ausführungsform; und
• 8 ausschnittsweise eine schematische Draufsicht des Membranelements der Membran gemäß der ersten Ausführungsform.

The drawing shows in:

• 1 a schematic and sectioned perspective view of a circuit breaker for a preferably designed as a medium-voltage switchgear switchgear, with a membrane according to the invention according to a first embodiment;
• 2 a fragmentary schematic sectional view of the membrane;
• 3 a section of another schematic sectional view of the membrane;
• 4 a schematic plan view of a membrane element of the membrane according to a second embodiment;
• 5 a schematic plan view of a spacer element of the membrane;
• 6 a schematic plan view of the membrane element of the membrane according to a third embodiment;
• 7 a schematic plan view of the membrane element of the membrane according to the first embodiment; and
• 8th a detail of a schematic plan view of the membrane element of the membrane according to the first embodiment.

In the figures, identical or functionally identical elements are provided with the same reference numerals.

1 shows a detail in a schematic and cut perspective view with a whole 10 designated circuit breaker for a switchgear, especially for a medium voltage switchgear. The circuit breaker 10 comprises at least one electrical component 12 which is in 1 only partially or partially shown and formed for example as a vacuum tube. The circuit breaker 10 has an in 1 particularly schematically illustrated and on the device 12 specified fixed contact 14 as the first contact. In addition, the circuit breaker indicates 10 at least one moving contact 16 on, which along a by a double arrow 18 illustrated movement direction relative to the device 12 and relative to the fixed contact 14 between at least one contacting position and at least one separating position linear, that is translationally movable. The moving contact 16 includes, for example, at least one plunger 20 or is by the pestle 20 formed, wherein the moving contact 16 a second contact of the circuit breaker 10 is. The contacts (fixed contact 14 and moving contact 16 ) are, for example, within the vacuum tube or the component 12 arranged or recorded. The moving contact 16 is also referred to as a moving contact or moving contact and is electrically in the contacting position with the fixed contact 14 connected, for example, the moving contact 16 the fixed contact 14 , in particular directly, touched. Thus, in the contacting position, electrical currents can be transferred between the contacts.

In the disconnected position, however, is the moving contact 16 electrically from the fixed contact 14 disconnected so that, for example, no electrical currents can be transferred between the contacts. In particular, in the disconnected position, for example, a gap between the contacts is greater than in the contacting position, in which the gap is reduced to zero, for example, or canceled.

The circuit breaker 10 also includes a storage facility 22 over which the moving contact 16 linearly or translationally movable on the component 12 is stored. The storage facility 22 includes at least one on the device 12 fixed guide element for guiding the moving contact 16 in its linear or translational movements relative to the component 12 , In other words, the moving contact becomes 16 by means of the guide element, in particular relative to the component 12 and relative to the fixed contact 14 , guided when the moving contact 16 along the direction of movement relative to the device 12 and relative to the fixed contact 14 linear, that is translationally moved.

To now a particularly advantageous storage of the moving contact 16 To be able to realize, the guide element is a membrane 24 formed, which is designed as an electrical conductor and thus can be traversed by electric current. This means that the membrane 24 is designed for guiding or transmitting electrical currents.

In 1 is particularly schematically one of the circuit breaker 10 different, outside the device 12 arranged component, which, for example, a network-side installation 26 is. As will be explained in more detail below, electrical currents between the moving contact 16 and the installation 26 over the membrane 24 be transferred, these currents may also be particularly high and thus may also have several hundred amperes.

The membrane 24 is electrically connected to the moving contact 16 , in particular with the plunger 20 , so that, for example, an electric current from the membrane 24 on the moving contact 16 or vice versa of the moving contact 16 on the membrane 24 can be transferred.

Especially good in conjunction with 2 and 3 it can be seen that the membrane 24 a plurality of membrane elements arranged one above the other in the form of membrane rings 28 whose number is greater than 2. In addition, the membrane includes 24 a plurality of stacked spacer elements in the form of spacer rings 30 , which are also referred to as spacer rings and in each case between the membrane rings 28 are arranged. In other words, between exactly two superimposed and thus successive membrane rings 28 at least or exactly a spacer ring 30 arranged, by means of which the superposed, respective membrane rings 28 are kept at a distance from each other. The respective spacer ring touches 30 the respective membrane rings 28 . between which the respective spacer ring 30 is arranged. While 1 . 7 and 8th a first embodiment of the membrane 24 illustrate, shows 4 a second embodiment and 6 a third embodiment of the membrane 24 , The membrane rings 28 For example, are arranged congruent to each other, wherein it is further provided that, for example, the spacer rings 30 are arranged congruent to each other.

Like, for example, very good 4 and 5 is recognizable, is the respective membrane ring 28 or the respective spacer ring 30 an at least substantially circular disc, wherein the respective membrane ring 28 and the respective spacer ring 30 a respective passage opening 32 respectively 34 having. Further, the membrane rings 28 and the spacer rings 30 formed as respective electrical conductors, wherein the membrane rings 28 and the spacer rings 30 are made of the same material. This material is preferably a metallic, electrically conductive material such as copper. The passage openings 32 and 34 are also referred to as center holes and are arranged in mutual overlap, so that, for example, the moving contact 16 , in particular the plunger 20 , especially easy in the through holes 32 and 34 inserted or can be inserted therethrough. In synopsis with 1 it can be seen that the moving contact 16 , in particular the plunger 20 , partially in the through holes 32 and 34 and thus in the membrane 24 total recorded, causing the moving contact 16 stored particularly advantageous and with the membrane 24 can be electrically connected. The said electric current can thus, for example, between the moving contact 16 and the installation 26 over the membrane rings 28 and the spacer rings 30 flow, whereby a particularly advantageous transmission of electrical currents can be realized.

The membrane rings 28 and the spacer rings 30 are along a in 2 and 3 shown and by a double arrow 36 Stacking direction stacked on each other or stacked one above the other, such that the membrane rings 28 and the spacer rings 30 each alternating or arranged alternately. The stacking direction coincides with the direction of movement of the moving contact 16 together, the direction of movement with the axial direction of the membrane 24 coincides. Due to the design of the guide element as the membrane 24 has the membrane 24 in their axial direction and thus along the direction of movement a sufficiently low rigidity, so that the moving contact 16 can be moved particularly quickly and thus dynamically between the contacting position and the disconnected position. In one with the radial direction of the membrane 24 however coincident, perpendicular to the direction of movement, the membrane has 24 a particularly high rigidity, so that the membrane 24 has a particularly high lateral stiffness. As a result, for example, unwanted relative movements between the moving contact 16 and the device 12 in the radial direction of the membrane 24 be avoided, so that the moving contact 16 by means of the membrane 24 is defined.

The membrane 24 has at least one connection lug 38 on, over which the membrane 24 electrically with the installation 26 , in particular with an outside of the component 12 arranged contact element 40 the installation 26 , can be connected. While the contacts and a first part 42 the membrane 24 in the device 12 are arranged, is a through the terminal lug 38 formed second part 44 the membrane 24 outside the device 12 arranged, whereby, for example, the moving contact 16 over the membrane 24 electrically with the contact element 40 and thus with the installation 26 can be connected.

Especially good 4 and 5 it can be seen that the connecting lug 38 the membrane 24 by respective, arranged in mutual overlap flag parts 46 the membrane rings 28 and the spacer rings 30 is formed, with the respective flag parts 46 are arranged congruently. The connection flag 38 stands in the radial direction of the membrane 24 from an at least substantially annular base body 48 the membrane 24 off, causing the terminal lug 38 from the component 12 can be led out.

The connection flag 38 or the respective flag part 46 has an at least substantially rectangular cross section in order to allow a particularly advantageous electrical contact.

Overall, it can be seen that the membrane 24 a double function. On the one hand, the membrane for storing and guiding the moving contact 16 used. On the other hand, the membrane 24 used to make electrical currents between the moving contact 16 and the installation 26 over the membrane 24 respectively. This is the membrane 24 designed as a bifunctional membrane or as a bifunctional bearing, guided by which electrical currents and the moving contact 16 on the device 12 is movably mounted.

Out 4 is recognizable by the body 48 which is at least substantially annular, an area in the form of a ring area 50 of the respective membrane ring 28 is formed. At the ring area 50 closes in the radial direction of the membrane 24 inside the passage opening 32 at. In the radial direction of the membrane 24 outward closes to the ring area 50 the connection flag 38 or the flag part 46 at.

Now to a particularly advantageous, in particular elastic, deformability of the membrane 24 to realize, whereby the moving contact 16 can be stored highly dynamic, is the respective membrane ring 28 slotted, whereby the respective membrane ring 28 an arrangement of several slots 52 having. The slots 52 are respective, elongate passage openings, which, for example, the ring area 50 in the axial direction of the membrane 24 penetrate. Through the slots 52 For example, a plurality of strips, in particular sheet metal strips, formed, via which, for example, an inner edge region 54 in the form of an inner ring, in particular the ring area 50 , with an outer edge area 56 in the form of an outer ring, in particular of the annular region 50 , connected is. Here are the in 4 denoted by 58 and in the radial direction of the membrane 24 or the respective membrane ring 28 between the border areas 54 and 56 arranged stripes 58 integral with the edge areas 54 and 56 educated. Furthermore, it is preferably provided that the strips, which are preferably designed as sheet metal strips 58 are the same shape. The respective stripes 58 the respective membrane rings 28 are stacked in alternation.

At the in 4 illustrated second embodiment, the slots extend 52 straight and in the radial direction of the membrane, so for example, the slots 52 star-shaped in the radial direction to the outside. Thus, the slots are 52 formed in the second embodiment by a radial slit.

Such an arrangement of slots 52 has the immediate advantage that by adjusting the thickness of the respective, individual membrane ring 28 the setting of the number of membrane rings 28 a balance of mechanical and electrical requirements can be realized, especially in terms of stiffness and conductivity. In other words, the stiffness of the membrane 24 be kept sufficiently low along the direction of movement, while at the same time a sufficient conductivity of the membrane 24 can be closed to over the membrane 24 To be able to transmit high electrical currents of, for example, several hundred amperes.

In the second embodiment, the slots are 52 formed as straight or rectilinear, strictly radially extending slots, for example with an angular difference of 10 degrees. In other words, for example, the slots point 52 in the circumferential direction of the membrane 24 in pairs a distance of 10 degrees to each other. Through such slots 52 will the stiffness of the membrane 24 significantly reduced, at the same time reduces the electrical conductivity of the membrane 24 from the outer edge area 56 to the inner edge area 54 not worth mentioning.

At the in 6 illustrated embodiment, the slots extend 52 straight or straight, but tangential and thus for example perpendicular to the radial direction of the membrane 24 , The influence of the slots 52 for stiffness and conductivity can be determined for example by simulation. A variety of other, different slot arrangements is conceivable, but not shown individually.

At the in 1 . 7 and 8th illustrated first embodiment, the slots extend 52 arcuate and involute so that involute slit is provided. The involute slot is a slot along an involute and results in webs through the involute slot 59 between the formed as an inner ring inner edge region 54 and formed as an outer ring outer edge region 56 arise, these webs 59 between the inner ring and the outer ring have a constant width. This makes their contribution to conductivity very easy to calculate. Regarding the rigidity of the membrane 24 This results in the very favorable situation that, for example, the webs 59 resulting in very long, thin arms, whose respective individual stiffness is very low due to their large length, so that the overall stiffness of the membrane 24 with the involute slit is considerably lower than that of a non-slotted, equally thick membrane. By varying the parameters of the involute and the respective individual width of the respective web 59 together with the particular in the axial direction of the membrane 24 extending thickness of the membrane 24 allow rigidity and conductivity of the membrane 24 or the respective, individual membrane ring 28 within very wide limits and thus adjust as needed, so that a consistent configuration of the storage facility 22 is achievable with respect to the desired low rigidity and desired high conductivity.

Due to the fact that the membrane rings 28 through the spacer rings 30 are spaced apart or separated, significant and uncontrollable friction effects, which occur for example in conventional contacts with copper balls, avoided since respective surfaces of the membrane rings 28 do not rub against each other and also excessive friction between the respective membrane ring 28 and the respective spacer ring 30 can be avoided. To avoid the friction between the respective diaphragm ring 28 and the respective spacer ring 30 To keep particularly low, has the respective passage opening 32 respectively 34 a circumference, in particular an inner circumference, on. In the embodiments illustrated in the figures, it is provided that the respective passage opening 32 respectively 34 is circular, so that the respective circumference, in particular inner circumference, with a respective diameter, in particular inner diameter, of the respective passage opening 32 respectively 34 correlated. Now to the friction between the respective diaphragm ring 28 and the respective spacer ring 30 To keep particularly low, is the circumference of the passage opening 32 much smaller than the circumference of the through hole 34 ,

In addition, it is provided that the respective membrane ring 28 or the respective spacer ring 30 outside circumference at least predominantly, that is formed to more than half circular, which in the membrane ring 28 through the main body 48 or the ring area 50 is realized. Also the respective spacer ring 30 has an at least substantially annular body 60 on which a ring area 62 forms. Here is the respective flag part 46 of the respective spacer ring 30 in the radial direction of the respective spacer ring 30 or the membrane 24 from the respective base body 60 , in particular to the outside, from.

• - elektrische Kontaktierungen der auch als Schaltröhre bezeichneten Vakuumröhre sowie Lagerung des mit dem Bewegkontakt 16 verbundenen oder zumindest einen Teil des Bewegkontakts 16 bildenden Stößels 20, wobei diese elektrische Kontaktierung sowie die Lagerung durch die Membran 24 realisiert und somit als eine funktionale Einheit ausgebildet sind
• - zur Kontaktierung des Bewegkontaktes 16 müssen keine Kupferbänder verwendet werden, die mit nicht genau bezifferbaren Beiträgen zur Steifigkeit und Dämpfung die Auslegung des Systems erschweren
• - elektrische Leitfähigkeit und Federsteifigkeit der als bifunktionales Lager ausgebildeten Membran 24 können über eine Vielzahl von Parametern bedarfsgerecht eingestellt und somit maßgeschneidert und zielgerichtet gestaltet werden. Dabei ist der Parameterraum sehr weit gefasst, sodass sich ein entsprechend großer Lösungsraum ergibt. Die Gefahr, dass grundsätzlich widersprechende Zielanforderungen zu keiner Lösung führen, ist damit minimal.

In particular, by the storage device 22 and in particular through the use of the membrane 24 the following advantages are realized:

• - Electrical contacts of the vacuum tube also referred to as a switching tube and storage of the moving contact 16 connected or at least part of the moving contact 16 forming plunger 20 , wherein this electrical contact as well as the storage through the membrane 24 realized and thus formed as a functional unit
• - For contacting the moving contact 16 It is not necessary to use copper strips which, with not exactly quantifiable contributions to stiffness and damping, make it difficult to design the system
• - Electrical conductivity and spring stiffness of the designed as a bifunctional bearing membrane 24 can be set according to requirements via a large number of parameters and thus made tailor-made and targeted. The parameter space is very broad, resulting in a correspondingly large solution space. The risk that fundamentally contradictory target requirements lead to no solution is therefore minimal.

For example, the respective membrane ring 28 one, in particular on the inner edge region 54 provided, projection 64 on, which, in particular in the radial direction of the membrane 24 or the respective membrane ring 28 , in the respective passage opening 32 protrudes. The projection has, for example, an angular, in particular rectangular, cross-section and thus an angular outer contour and is used, for example, as a positive-locking element. In fully manufactured condition of the circuit breaker 10 For example, takes the lead 64 in a corresponding recess of the moving contact 16 , in particular the plunger 20 , one, whereby the moving contact 16 or the plunger 20 positive fit with the membrane 24 interacts. As a result, for example, unwanted relative rotation between the membrane 24 and the pestle 20 or the moving contact 16 be avoided. In addition, a defined orientation of the moving contact 16 or the plunger 20 to the membrane 24 be guaranteed because the moving contact 16 or the plunger 20 only then or only in such a way in the through holes 32 and 34 can be inserted, if or that the projection 64 is inserted into the corresponding recess, in particular in the axial direction of the membrane 24 ,

Claims (15)

Bearing device (22) for supporting a moving contact (16) on an electrical component (12) for a circuit breaker (10), with at least one on the component (12) attachable guide member for guiding the moving contact (16) in its linear movements relative to the device (12), characterized in that the guide element as a membrane (24) is formed, which is formed as an electrical conductor and electrically connected to the moving contact (16) and at least two superposed membrane elements (28) and at least one between the membrane elements (28 ) arranged spacer element (30). Bearing device (22) according to Claim 1 , characterized in that the membrane (24) has at least one terminal lug (38) via which the membrane (24) is electrically connectable to at least one contact element (40) provided outside the component (12). Bearing device (22) according to Claim 2 , characterized in that the connecting lug (38) by respective, arranged in mutual overlap flag portions (46) of the membrane elements (28) and the spacer element (30) is formed. Bearing device (22) according to one of the preceding claims, characterized in that the membrane elements (28) and the spacer element (30) are formed as respective electrical conductors. Bearing device (22) according to one of the preceding claims, characterized in that the membrane elements (28) and the spacer element (30) are formed from the same material. Bearing device (22) according to one of the preceding claims, characterized in that the respective membrane element (28) and the spacer element (30) each have a passage opening (32, 34) for at least partially receiving the moving contact (16), wherein the passage openings (32 , 34) are arranged in mutual overlap. Bearing device (22) according to Claim 6 , characterized in that the respective passage opening (32, 34) has a respective circumference, wherein the circumference of the passage opening (32) of the respective membrane element (28) is smaller than the circumference of the passage opening (34) of the spacer element (30). Bearing device (22) according to Claim 6 or 7 , characterized in that at least one of the membrane elements (28) and / or the spacer element (30) has at least one projection (64) projecting into the passage opening (32, 34). Bearing device (22) according to any one of the preceding claims, characterized in that at least one of the membrane elements (28) and / or the spacer element (30) is slotted and thereby has a plurality of slots (52). Bearing device (22) according to Claim 9 , characterized in that the slots (52) rectilinear, in particular in the radial direction of the membrane (24), or arcuate, in particular involute, extend. Bearing device (22) according to any one of the preceding claims, characterized in that the respective membrane element (24) is formed on the outer peripheral side at least predominantly circular. Bearing device (22) according to any one of the preceding claims, characterized in that the spacer element (30) is formed on the outer peripheral side at least predominantly circular. Circuit breaker (10), comprising at least one electrical component (12), with at least one fixed contact (14) fixed to the component (12), with at least one moving contact (16) which is relative to the component (12) and relative to the fixed contact (14) between at least one contacting position, in which the moving contact (16) is electrically connected to the fixed contact (14), and at least one separating position is linearly movable, in which the moving contact (16) is electrically isolated from the fixed contact (14), and with a bearing device (22), via which the moving contact (16) is mounted linearly movably on the electrical component (12), wherein the bearing device (22) has at least one guide element fastened to the component (12) for guiding the moving contact (16). having in its linear movements relative to the component (12), characterized in that the guide element is formed as a membrane (24), which is designed as an electrical conductor and electrically connected to the moving contact (16) and at least two superposed membrane elements (28) and at least one between the membrane elements (28) arranged spacer element (30). Circuit breaker (10) after Claim 13 , characterized in that the electrical component (12) is designed as a vacuum tube, in which the fixed contact (14) and the moving contact (16) are arranged. Switchgear, in particular medium-voltage switchgear, with at least one bearing device (22) according to one of Claims 1 to 12 and / or with at least one circuit breaker (10) Claim 13 or 14 ,

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