DE102016214377B4 - Contact arm arrangement for a high-voltage switching device and its use - Google Patents

Abstract

Contact arm arrangement (2) for a high-voltage switching device (1), having at least two contact arms (7), which are arranged in pairs and at least one joint (10) movable relative to each other, and which each have a contact arm upper part (8) and a contact arm -Unterteil (9), wherein in each case the contact arm upper part (8) has at least one recess which is adapted for receiving a contact element (17), characterized in that the contact arm lower part (9) and / or the contact arm upper part (8) comprises at least two profile bars (13), which are in particular rigidly connected to one another via spacer elements (15).

Description

The invention relates to a contact arm arrangement for a high-voltage switching device and its use, wherein the contact arm assembly comprises at least two contact arms, which are arranged in pairs and at least one joint relative to each other movable, and each comprising a contact arm upper part and a contact arm lower part.

High-voltage switchgear devices are used in the high-voltage range, ie from a voltage of 1000 V. High-voltage switchgear devices are z. B Disconnectors, in particular single-column disconnectors, which are used to visibly disconnect a current path, or earthing switch. High-voltage switchgear devices may be constructed in the manner of a pantograph, such. B. from the DE 32 31 170 A1 is known. In this case, a typical structure comprises at least one contact with a movable and a fixed contact piece. The solid contact piece, ie the fixed contact is z. B is a spatially fixed cylindrical metal tube or cable. The contact piece is made of a material such. B copper, which conducts electricity well, and / or aluminum, for high mechanical strength.

The movable contact piece comprises z. B a contact arm arrangement with at least two contact arms, which are arranged in pairs and at least one joint movable relative to each other, analogous to a pantograph. The contact arms each include a contact arm top and a contact arm bottom. When electrically connected to the fixed contact piece, the contact arm tops of the respective contact arm pair are moved towards each other, d. H. connected via the joint moves analogous to the closing of a pair of scissors, wherein the fixed contact piece is clamped between the contact arm tops. In this case, the electrical contact between the fixed and the movable contact pieces via the contact arm tops is made in conjunction with the fixed contact piece.

When opening the current path via the contact arrangement, the contact arm upper parts of the respective contact arm pair are moved away from each other, d. H. moved in accordance with the opening of a pair of scissors, wherein the fixed contact piece between the contact arm tops is released from the contact arm tops. The contact arms can z. B consist of tubular metal pieces, z. B made of copper and / or aluminum tubes.

In the connected or switched state of the high-voltage switching device, a good electrical contact between the fixed contact and the movable contact arms is necessary to conduct lossless or at least low-loss electrical current through the contact.

So that the separation distance z. B is clearly visible on disconnectors and earthing switches to the outside, and for reasons of space, the switch is usually not encapsulated and not installed in a housing. Thus, the elements or parts of the high-voltage switching device may be exposed to the weather. Wind and / or ice load can lead to an unwanted movement of the movable contact pieces, in particular to a movement away from the fixed contact, which deteriorates the electrical contact and thus leads to higher electrical losses over the contact away. In extreme cases, a separation of the current path can take place, unintentionally and with negative consequences for the connected power grid.

In a short circuit, high currents can cause forces, eg. B about changing magnetic fields around the current-carrying parts, d. H. induced by forces, which can lead to a movement of the movable contact arms away from the fixed contact. Like weather, this can degrade the electrical contact and thus lead to higher electrical losses across the contact. In extreme cases, an unintentional disconnection of the current path can take place.

By the problems described above, the reliability of the high-voltage switching device is limited, and high electrical losses can lead to high costs. Safe, controlled disconnection and connection of the electrical contacts may be limited or impossible. An adaptation of the contact surfaces between the movable and fixed contact pieces is expensive and possibly associated with a high cost of materials, since the contacts must be changed and adapted as a whole. So z. B for a higher current flow with low resistance Pipe pieces are designed as a whole with a larger cross section, with more material and / or as a rectangular rod with a contact surface adapted profile. This increases costs and reduces design freedoms, e.g. B the adaptation of the profile to mechanical stability requirements.

The object of the present invention is the avoidance or reduction of the problems described above. In particular, it is an object to provide a contact arm arrangement for a high-voltage switching device and its use, which enable a reliable function, in particular with low electrical losses in the connected state of the high-voltage switching device, and a cost-effective, the requirements allow adapted, especially modular design.

The stated object is achieved by a contact arm for a high-voltage switching device with the features according to claim 1 and / or by the use of Kontaktarmanordnung according to claim 8. Advantageous embodiments of the contact arm arrangement according to the invention for a high-voltage switching device and / or the use of the contact arm arrangement are specified in the subclaims. In this case, the subject matter of the main claim with the features of the subclaims and features of the dependent claims can be combined with each other.

A contact arm arrangement according to the invention for a high-voltage switching device comprises at least two contact arms, which are arranged in pairs and at least one joint movable relative to each other, and each having a contact arm upper part and a contact arm lower part. The contact arm upper part has in each case at least one or exactly one recess, which is designed to receive a contact element.

Due to the recess in the contact arm upper part, in each case one contact element can be fastened in a stable and electrically conductive manner to the contact arm in a simple and cost-effective manner. About the recess contact elements with a predetermined, favorable shape and made of a suitable material, regardless of the shape and the material of the contact arm shell, be attached to the contact arm shell, tailored to the application of the high-voltage switching device. The shape of the contact arm upper part is independent of the shape of an electrical contact surface for an electrical contact between the contact arm and fixed contact. It can z. B T-shaped contact elements are used, which are selected according to the voltage ranges and currents through the contact. Thus, T-shaped contact elements with respect to a tubular, d. H. O-shaped contact piece to produce a larger contact area between movable contact pieces and fixed contact, which allows a more reliable current flow with lower electrical losses in the closed state of the high-voltage switching device. It can contact elements made of copper with or without coatings z. B made of silver, or erosion-resistant materials for a long-term stable, good electrical contact. The contact elements can provide a good electrical contact in the closed state of the high-voltage switching device, with low electrical losses and low resulting costs, especially in adverse weather conditions such. B in wind and ice formation and / or short circuits in the network.

Compared with contact arm tops from one piece, especially from a round tube, z. B contact elements are used with a T-profile, which have an elongated contact surface on a tubular fixed contact. In contrast, cylindrical contact arm tops without a contact element, in conjunction with a tubular, d. H. cylindrical fixed contact, only a punctiform contact surface. A higher reliability of the contact during movement of a contact piece along the longitudinal axis of the opposite contact piece is given by the larger support surface, since the contact may be only locally along the longitudinal axis and not completely interrupted. A larger footprint also results in a better flow of current, with lower electrical losses.

The formation of the contact arm upper parts each with a recess for receiving a contact element, allows a modular structure of the contact arm and a simple exchange of contact elements. The latter can be selected independently of the remaining structure of the Kontaktarmanordnung, optimized in shape and material for a good electrical contact, according to the required current and voltage range of the high-voltage switching device. When worn, the contact elements can be easily removed from the recess and replaced with new contact elements. The contact arm design with the exception of the recess is independent of the contact element, and can with respect to material and shape on properties such. B be optimized mechanical stability and cost reduction.

The high-voltage switching device may be a high-voltage circuit breaker, in particular a pantograph-type circuit breaker, or the high-voltage switching device may be a high-voltage grounding switch, in particular a pantograph-type grounding switch. The high-voltage switching device may be designed in the manner of a single-column switching device. The advantages of the contact arm arrangement described above are given in particular in disconnectors and earthing switches as well as single-column switching devices and switching devices, which are constructed in the manner of a pantograph.

A number of contact arms may be included in the contact arm arrangement, which is dependent on parameters of the power network to which the high-voltage switching device is connected, in particular depending on the operating current and / or short-circuit current. For larger, maximum occurring currents and / or voltages, can a larger number of contact arms are used. The number can also be selected depending on the shape and shape of the contact arms, especially when reducing the Kontaktarmquerschnitts a higher number of contact arms can be used. The flexibility in the design of the contact arm assembly can result in cost reductions, enable safe operation, and / or maintain or reduce maximum occurring electrical losses across the contact.

According to the invention, the contact arm lower part and / or the contact arm upper part comprises at least two profile rods, which are in particular rigidly connected to one another via spacer elements. This allows a mechanically stable contact arm arrangement with good electrical properties, which has recesses. Parts such as B contact elements and areas of the other contact arms can be partially or completely arranged in the recesses. A contact arm, z. B the contact arm upper part can be in another contact arm, z. B are arranged in the contact arm lower part, in particular in a joint area, whereby a scissor-like movement is easily possible.

The recess for receiving a contact element of the contact arm upper part may be elongated along the longitudinal axis of the contact arm upper part, in particular in the manner of a gap. In the gap, the contact element can be easily arranged and fixed. The elongated design allows the arrangement of an elongate contact element, in particular with a large contact surface and / or rectangular contact surface, for good contact properties z. B when moving contact pieces against each other.

The respective recess of a contact arm upper part may be in the form of a groove in a profile bar, in particular a rectangular profile bar with rounded corners and edges. At least one contact element, in particular in T-shape, can be at least partially embedded in the recess, in mechanical and electrical contact with the profile bar. Grooves are easy and inexpensive to produce, for. B by milling, laser cutting, embossing. A T-shaped contact element can be easily and mechanically stable inserted into a groove, in particular with mechanical and electrical contact with the material of the contact arm shell. Thereby, the contact arm arrangement can be constructed in a simple and cost-effective manner with contact elements, with good electrical properties for contact between contact pieces. Rounded corners and edges reduce or prevent corona and flashovers.

The respective recess of a contact arm upper part may alternatively or additionally be formed in the form of a slot between at least two rectangular profile bars, which are spaced from one another via spacer elements attached to each other. In particular, rectangular profile bars with rounded corners and edges can be arranged at a distance. At least one contact element, in particular in T-shape, can be at least partially embedded in the recess between the profile bars, in mechanical and electrical contact with the profile bars. About spaced profile rods can be easily and inexpensively slots or recesses for contact elements are formed. As a result, as described above, the contact arm arrangement can be constructed in a simple and cost-effective manner with contact elements, with good electrical properties for contact between contact pieces. Rounded corners and edges of rectangular profile bars lead to a reduction or avoidance of corona phenomena and flashovers.

At least one fixed contact may be comprised by the contact arm arrangement, which in the closed state of the current path of the high-voltage switchgear is in electrical contact with the at least two contact arms. A hard contact is easy and inexpensive to implement. Alternatively, a movable contact may be used, which moves to close the contact towards contact arm tops.

Two contact arm pairs, each with two contact arms, may be comprised by the contact arm arrangement, in particular two contact arm pairs arranged parallel to one another, which are mechanically connected to one another via at least one connecting element, in particular via a connecting element arranged in the region of the joints. The structure described results in a mechanically stable, inexpensive to produce Kontaktarmanordnung, which can be used in particular in the manner of a pantograph, and which has a high reliability in producing and holding the electrical contact over the two contact arm pairs, with high current carrying capacity over a total of four contact arms ,

In a Kontaktarmanordnung with contact arms as described above, there is a good electrical contact without high losses in the on state of the high-voltage switching device, in particular with T-shaped contact elements of the respective movable contact arm in electrical and mechanical contact with a fixed contact, in particular in a cylindrical tube shape.

Upon movement of a contact arm on the fixed contact, in particular in the event of a short circuit and / or in wind and / or ice load, a rolling of the contact can be done on the fixed contact, wherein the contact surface between the fixed contact and T-shaped contact element, in particular the surface on the upper side of the horizontal web of the T-shaped contact element, by the rounding of an electrical contact continuously receives, with a constant effective contact area between contact and fixed contact.

A use according to the invention of the contact arm arrangement described above comprises that the contact arm arrangement is used in a high-voltage switching device in the manner of a pantograph. Pantographs can form a good contact by clamping at least one contact piece between mating contact pieces, which is mechanically and electrically stable, with low electrical losses. A scissor-like movement of contact pieces of the pantograph can be done easily, with little drive power, reliable without jamming of contacts, resulting in a high reliability and low electrical losses in the on state of the high voltage switching device.

The high-voltage switching device can be covered by a high-voltage electrical network and / or electrically connected to it, in particular a high-voltage network with voltages from 1000 V operating voltage. The advantages described above are positive in particular in a high-voltage network.

The advantages of the use according to the invention of the above-described contact arm arrangement according to claim 8 are analogous to the previously described advantages of the contact arm arrangement for a high-voltage switching device according to claim 1 and vice versa.

In the following, embodiments of the invention are schematically illustrated in FIGS 1 to 7 shown and described in more detail below.

• 1 schematisch in Seitenansicht ein Hochspannungs-Schaltgerät 1 nach Art eines Pantographen mit einer erfindungsgemäßen Kontaktarmanordnung 2, und
• 2 die Kontaktarmanordnung 2 der 1 in mehr Detail, mit zwei Kontaktarmen 7 eines Kontaktarm-Paares, welche jeweils ein Kontaktarm-Oberteil 8 und ein Kontaktarm-Unterteil 9 über ein Gelenk 10 verbunden umfassen, und
• 3 zwei parallele Kontaktarm-Paare mit Kontaktarmen 7 der 2, starr verbunden über Verbindungselemente 11, und
• 4 ein erstes Ausführungsbeispiel eines Kontaktarm-Oberteils 8 mit Nut 12 als Ausnehmung für ein Kontaktelement, und
• 5 ein zweites Ausführungsbeispiel eines Kontaktarm-Oberteils 8 mit einer Ausnehmung für ein Kontaktelement, ausgebildet zwischen zwei Profilstangen 13 beabstandet durch Abstandselemente 15, und
• 6 ein Kontaktarm-Oberteil 8 nach 4, mit einem Kontaktelement 17 in der Nut 12 als Ausnehmung angeordnet, und
• 7 ein Kontaktarm-Oberteil 8 nach 5, mit einem Kontaktelement 17, angeordnet in der Ausnehmung zwischen den zwei Profilstangen 13.

The show

• 1 schematically in side view a high-voltage switching device 1 in the manner of a pantograph with a contact arm arrangement 2 according to the invention, and
• 2 the contact arm 2 of the 1 in more detail, with two contact arms 7 of a contact arm pair, each comprising a contact arm upper part 8 and a contact arm lower part 9 connected via a hinge 10, and
• 3 two parallel contact arm pairs with contact arms 7 of the 2 , rigidly connected via connecting elements 11, and
• 4 a first embodiment of a contact arm shell 8 with groove 12 as a recess for a contact element, and
• 5 a second embodiment of a contact arm upper part 8 with a recess for a contact element, formed between two profile bars 13 spaced by spacers 15, and
• 6 a contact arm upper part 8 after 4 , arranged with a contact element 17 in the groove 12 as a recess, and
• 7 a contact arm upper part 8 after 5 , with a contact element 17, arranged in the recess between the two profile bars 13.

In 1 is a high voltage switchgear 1 represented in the manner of a pantograph as a single-column circuit breaker. The high voltage switchgear 1 has a contact arm arrangement according to the invention 2 on which on a support frame assembly 5 with insulators 4 is arranged. In the illustrated embodiment of the single-column circuit breaker, is on a support frame assembly 5 , executed analogous to a base, a contact arm arrangement 2 with contact arms 7 arranged in the manner of a pantograph, which in the closed state of the current path of the high-voltage switching device 1 in electrical and in particular mechanical contact with a mating contact 3 , designed as a fixed contact stands. The current path, z. B in a high-voltage power grid, is via the high-voltage switching device 1 shown closed, with an electrical contact between fixed contact 3 and contact arms 7 , Dashed the open state is shown, with dashed trajectory of the contact arms 7 , wherein the current path between fixed contact 3 and contact arms 7 is interrupted.

The movement of the contact arms 7 or the switching between the open and closed state of the high-voltage switching device 1 is driven by a drive 6 on the support frame assembly 5 , The movement is from the drive 6 via a kinematic chain with z. B elements like insulators 4 or waves in the insulators 4 on the contact arm arrangement 2 transfer. The drive 6 can z. B be a motor, in particular an electric motor or a spring-loaded drive. Elements such. B gears, pulleys and / or shafts may be included in the kinematic chain.

In 2 is a side view of the contact arm assembly 2 of the 1 shown in more detail, with a plane of movement of the contact arms 7 in the drawing plane.

The two contact arms 7 of the contact arm pair shown each comprise a contact arm top 8th and a contact arm base 9 , which have a joint 10 connected to each other. The two contact arms 7 of the contact arm pair, connected via a joint 10 , are movably mounted. The joints 10 allow a movement in which the contact arm tops 8th in the upper area, above the joint 10 between two contact arms 2 , when closing the current path of the high-voltage switching device 1 move towards each other and move away from each other when opening. The contact arms 7 form over the joint 10 between the two contact arms 7 a kind of pair of scissors, between their thighs the mating contact 3 is mechanically clamped when closing the current path. The counter contact 3 is in for simplicity 2 not shown.

The contact arm shell 8th and the contact arm base 9 a contact arm 7 are about a joint 10 each movably connected. By connecting two contact arms 7 or two contact arm tops 8th about a joint 10 Performs a movement in which the joints 10 , each the contact arm lower part 9 and the contact arm top 8th connect at one end, away from one another, to open through the contact arm tops 8th formed scissors. This is the joint 10 for connecting the two contact arms 7 or two contact arm tops 8th moved down.

In this position, the current path is over the high-voltage switching device 1 open.

A movement of the contact arms 7 takes place in each case by turning the contact arm lower parts 9 about an axis perpendicular to the plane of the 2 , wherein the axis of rotation at the end of the respective contact arm lower part 9 is arranged, which is the end of the contact arm lower part 9 with jointed 10 opposite. The rotational movement of the contact arm lower part 9 its bottom end is by the drive 6 , transmitted via the kinematic chain causes. To open the flow path, the contact arm lower parts 9 rotated in opposite directions away from each other, ie the right contact arm lower part 9 clockwise and the left contact arm base 9 counterclockwise. To close the current path, the contact arm lower parts 9 rotated in opposite directions towards each other, ie the right contact arm lower part 9 counterclockwise and the left contact arm lower part 9 in a clockwise direction.

Analogous to a pantograph, the rotational movement of the two contact arm lower parts causes 9 around the axis at the end of the contact arm parts 9 , a movement of the contact arm tops 8th , A movement of the contact arm parts 9 with a movement of the joints 10 that the contact arm bottoms 9 with the contact arm tops 8th Connect, away from each other, moves the lower and upper ends of the contact arm tops 8th away from each other. The scissors or the contact to the mating contact 3 is opened and the current path is interrupted. This is the joint 10 The contact arm tops 8th the two contact arms 7 connecting with each other, moving down. The ends of the contact arm tops 8th are moved down and the freely movable end of the two contact arm parts 9 is moved downwards. The end of the contact arm base 9 , on which the axis of rotation is located, each changes its height or position to the support frame assembly 5 Not.

A movement of the contact arm parts 9 with a movement of the joints 10 that the contact arm bottoms 9 with the contact arm tops 8th Connecting, towards each other, moves the lower and upper ends of the contact arm tops 8th also to each other. The scissors or the contact to the mating contact 3 is closed and the current path is closed, ie the mating contact 3 gets between the upper ends of the contact arm tops 8th trapped electrically conductive. This is the joint 10 The contact arm tops 8th the two contact arms 7 connecting with each other, moving upwards. The ends of the contact arm tops 8th are moved upwards and the freely movable end of the two Kontaktarm-lower parts 9 is moved upwards. The end of the contact arm base 9 , on which the axis of rotation is located, each changes its height or position to the support frame assembly 5 Not.

The contact arm tops 8th can, as in 2 is shown to have a kink. This makes them upper ends of the contact arm tops 8th bent towards each other. When closing the contact or the current path is the mating contact 3 trapped between the upper ends of the contact arm tops 8th before getting the lower ends of the contact arm tops 8th or the upper ends of the contact arm lower parts 9 or the joints 10 , which respectively the contact arm tops 8th and bottoms 9 connect with each other, touch each other. A good clamping of the mating contact 3 can be achieved without any contact with the contact arm tops during clamping 8th or the lower parts 9 at their ends or the connecting joints 10 takes place and the clamping is hampered thereby. Overlapping hook-shaped structures at the upper ends of the contact arm tops 8th can the degrees of freedom of movement of the contact arms 7 reduce in the clamped state. This will hold the closed state of the high voltage switchgear 1 z. B is improved in weather conditions such as wind or short circuits.

In 3 are two parallel contact arm pairs with contact arms 7 of the 2 , rigidly connected via fasteners 11 shown. The connecting elements 11 are z. B in the form of waves or rods perpendicular to the plane of the drawing 2 in 3 arranged between the contact arm pairs. The connecting elements 11 are each at the joints 10 arranged, and each connect two equivalent joints 10 the opposite contact arm pairs with each other. The three connecting elements 11 are the same length, whereby the contact arm pairs are arranged parallel to each other. A tubular mating contact 3 is with its longitudinal axis parallel to the longitudinal axes of the connecting elements 11 arranged. For the sake of simplicity, the mating contact 3 in 3 not shown.

The contact arm arrangement of 3 , with two mutually parallel contact arm pairs of 2 with contact arms 7 , allows for improved clamping with lower electrical losses compared to clamping the mating contact 3 with only one contact arm pair. It is generated in the closed state of the high-voltage switching device 1 four contact points between contact arm tops 8th or contact arms 7 and the mating contact 3 , The flow of current through four contact points with less resistance or lower losses compared to two contact points when using only one contact arm pair, and the clamping is more reliable and mechanically stable.

In 4 is an upper end of a contact arm shell 8th in the 1 to 3 illustrated contact arms 7 shown. The dashed line 16 represents the previously described kink axis or kink in the contact arm tops 8th An elongated recess in the contact arm upper part 8th is through an elongated groove 12 along the longitudinal axis of the contact arm upper part 8th educated. The groove 12 can through the entire cross section of the contact arm shell 8th or only in a surface area up to a certain depth, e.g. B in the range of centimeters in the contact arm shell 8th be educated.

In 5 is an alternative embodiment of the in 4 illustrated contact arm shell 8th shown. The recess is between two parallel profile bars 13 through spacers 15 between the profile bars 13 educated. The distance between the profile bars 13 or the width of the spacer elements 15 gives the width of the recess and the distance of the spacer elements 15 each other gives the length of the recess along the longitudinal axis of the contact arm shell 8th , The spacers 15 can z. B by screws and / or welding and / or soldering and / or gluing on the two profile bars 13 the contact arm shell 8th be attached. They hold the two profile bars 13 to a particular constant distance from each other along the longitudinal axis of the profile bars 13 or the contact arm shell 8th , fasteners 14 can along the longitudinal axis of the profile bars 13 or the contact arm shell 8th be arranged around the two profile bars 13 stable mechanical and in particular electrically connect with each other. Analogous to the contact arm upper part 8th can the contact arm bases 9 be constructed of two profile bars 13 with fixing 14 and / or spacers 15 ,

In 6 is a contact arm shell 8th to 4 , with a contact element 17 in the groove 12 arranged as a recess, shown in sectional view.

The contact arm shell 8th , which in the embodiment of the 6 is formed with a rectangular cross section, has a profile bar 13 and a spatially and electrically conductive with the profile bar 13 connected contact element 17 on. The profile bar 13 with wall 20 is hollow inside, and rod-shaped with a rectangular cross-section perpendicular to the rod longitudinal axis. The edges of the profile bar 13 are rounded to prevent surges on corners and edges. On one side, in 6 the top of the profile bar 13 , Is a groove or through recess through the wall 20 arranged. The groove is linear, along the longitudinal axis of the profile bar 13 trained, and connects the inner and outer space of the profile bar 13 ,

In the groove is a contact element 17 arranged or positively inserted. The contact element 17 is rod-shaped, ie elongated, in particular without being hollow inside. The contact element 17 has a T-shape in cross-section and is formed analogously to a rail. Laterally are holes through the contact element 17 continuous, on a vertical surface 19 arranged, which holes in a lateral surface of the profile bar 13 assigned. screw 14 and / or bolts can be passed through the holes of the contact element 17 on the profile bar 13 mechanically stable and / or good electrically conductive fasten. To achieve greater mechanical stability and better electrical conductivity, can along the fastener 14 in the interior of the profile bar 13 , between the wall of the profile bar 20 and the contact surface 19 , Spacers 21 be inserted.

The profile bar 13 can z. B made of copper, and / or made of aluminum. The contact element 17 Can be made of copper for good electrical conductivity and good electrical contact exist, and is about the profile bar 13 mechanically stable. The illustrated construction is a contact arm upper part 8th described, with high mechanical stability and good electrical contact properties in contact with the fixed or mating contact 3 , The contact arm lower part 9 of the contact arm 7 can analogous to the contact arm shell 8th be constructed, only without a groove 12 and / or contact element 17 ,

In 7 is a contact arm shell 8th to 5 shown in section, with a contact element 17 , arranged in the recess between the two profile bars 13 ,

The contact arm shell 9 of the 7 instead of a profile bar 13 with rectangular cross section, as in the 6 is shown, two parallel to each other profile bars 13 with an oval cross section. The oval cross section or the wall 20 a profile bar 13 is composed of two flat, parallel sides, which are centered on a perpendicular to the sides connecting web 18 which extends along the length of the profile bars 13 extends, are mechanically connected to each other, and two semicircles of radius r, which respectively the opposite ends of the planes parallel to the connecting web 18 connect with each other.

The two profile bars 13 are spaced, arranged parallel to each other, whereby a gap or a recess between the profile bars 13 is trained. In the gap is a T-shaped contact piece 17 , analogous to the contact piece 17 in the groove in the 6 arranged. fasteners 14 In particular screws, rivets and / or bolts can be used to profile bars 13 with each other and with the contact piece 17 mechanically stable to connect. The screws 14 with nuts, as in 7 is shown, over the outer sides of the contact arm shell 8th or the two profile bars 13 , the contact arm shell 8th hold together and / or press together. Alternatively or alternately, the screws 14 with nuts on inner surfaces of the profiled bars 13 act to the contact arm or the profile bars 13 and the contact piece 14 to hold together and / or to squeeze.

spacers 15 with a thickness like the contact elements 17 in the lower area, can between the profile bars 13 especially in the field of fasteners 14 to be ordered. Through the contact element 17 in the upper part of the profile bars 13 between the profile bars 13 arranged, and the spacers 15 in the lower part of the profile bars 13 between the profile bars 13 arranged, the two profile bars 13 the contact arm shell 8th parallel, fixed relative to each other. The contact arm lower part 9 of the contact arm 7 can analogous to the contact arm shell 8th be constructed, only without contact element 17 and with spacers 15 instead of contact element 17 in the upper part of the profile bars 13 ,

It can be the contact arms 7 z. B in various types of high voltage switchgear 1 be used. It can z. B disconnector or earthing can be used, in particular in the manner of a pantograph. It can use single-pole high-voltage switchgear instead 1 also high-voltage switchgear 1 be used with several, in particular movable columns. The high voltage switchgear 1 can be used for one or more phases in the power grid.

The profile bars 13 can have different shapes. So can profile bars 13 z. B rectangular, with rounded edges, as in 6 is shown formed with one or more slots or grooves, or the profile bars 13 can z. B oval, as in the 7 is shown with one or more recesses between a plurality of profile bars 13 be educated. In or in the recesses may be one or a respective contact element 17 be arranged. It can also have two or more profile bars 13 , in particular be arranged parallel to each other, as in 7 is shown, and the contact element 17 or the contact elements 17 can be between or between each profile bar 13 be arranged. This can profile bars 13 Cross sections such. B rectangular, oval and / or elliptical oval. In each case all profile bars 13 may be formed with the same cross section or with different cross sections, in particular with different shape. Combinations of the embodiments of the 6 and 7 be used with contact elements 17 between profile bars 13 and in recesses of the respective profile bar 13 arranged.

It can for the contact arm arrangement 2 two, four or more contact arms 7 be used. These can be arranged parallel and / or at an angle to each other. The contact arm tops 8th and the contact arm bottoms 9 can z. B the shape as in 6 have shown, or the shape as in 7 shown, or combinations of shapes. It can be electrically conductive or non-conductive fasteners 11 between the contact arms 7 be arranged. It can, as in 3 is shown, five connecting elements 11 used, or a smaller or larger number of fasteners 11 , joints 10 For example, shafts and / or bearings and optionally additional power transmission elements made of highly conductive materials such as copper or aluminum may be included.

The contact elements 17 and profile bars 13 can be done by screws 14 , Rivets or bolts z. B be joined together by welding or gluing. contact elements 14 and / or profile bars 13 may be coated for better electrical conductivity, e.g. B be silvered. In particular, contact surfaces between parts or elements of the contact arms 7 can be coated. profile bars 13 and / or contact elements 17 can be made of a material, in particular a good conductive material such. B copper, or mechanically stable materials such. B steel or aluminum, and / or may have different materials and / or alloys.

LIST OF REFERENCE NUMBERS

1

High-voltage switchgear

2

Contact arm assembly

3

countercontact

4

insulator

5

Support frame arrangement

6

drive

7

contact

8th

Contact shell

9

Contact-base

10

joint

11

connecting member

12

groove

13

section bar

14

fastener

15

spacer

16

bending axis

17

contact element

18

web

19

Contact surface contact element

20

Wall profile bar

21

spacer

Claims (9)

Contact arm arrangement (2) for a high-voltage switching device (1), having at least two contact arms (7), which are arranged in pairs and at least one joint (10) movable relative to each other, and which each have a contact arm upper part (8) and a contact arm -Unterteil (9), wherein in each case the contact arm upper part (8) has at least one recess which is adapted for receiving a contact element (17), characterized in that the contact arm lower part (9) and / or the contact arm upper part (8) comprises at least two profile bars (13), which are in particular rigidly connected to one another via spacer elements (15). Contact arm arrangement (2) according to Claim 1 , characterized in that a number of contact arms (7) is included, which is dependent on parameters of the power grid connected to the high-voltage switching device (1), in particular depending on the operating current and / or short-circuit current. Contact arm arrangement (2) according to one of Claims 1 to 2 , characterized in that the recess for receiving a contact element (17) of the contact arm upper part (8) along the longitudinal axis of the contact arm upper part (8) is elongate, in particular in the manner of a gap. Contact arm arrangement (2) according to one of Claims 1 to 3 , characterized in that the respective recess of a contact arm upper part (8) in the form of a groove (12) in a profile bar (13), in particular a rectangular profile bar is formed with rounded corners and edges, and / or at least one contact element (17) in particular in T-shape at least partially embedded in the recess (12), in mechanical and electrical contact with the profile bar (13). Contact arm arrangement (2) according to one of Claims 1 to 3 , characterized in that the respective recess of a contact arm upper part (8) is formed in the form of a slot between at least two rectangular profile bars (13) which are spaced from each other via spacers (15) attached to each other, in particular rectangular profile bars (13) with rounded corners and Edges, and / or wherein at least one contact element (17), in particular in T-shape at least partially embedded in the recess between the profile bars (13), in mechanical and electrical contact with the profile bars (13). Contact arm arrangement (2) according to one of Claims 1 to 5 , characterized in that at least one mating contact (3), in particular fixed contact is included, which in the closed state of the current path of the high-voltage switching device in electrical contact with the at least two contact arms (7). Contact arm arrangement (2) according to one of Claims 1 to 6 , characterized in that two contact arm pairs each with two Contact arms (7) are included, in particular two mutually parallel contact arm pairs, which are mechanically connected to each other via at least one connecting element (11), in particular via a respectively in the region of the joints (10) arranged connecting element (11). Use of the contact arm arrangement (2) according to one of Claims 1 to 7 , characterized in that the contact arm arrangement (2) in a high-voltage switching device (1) is used in the manner of a pantograph. Use of the contact arm assembly (2) according to Claim 8 , characterized in that the high-voltage switching device (1) is comprised of a high-voltage electrical network and / or is electrically connected thereto, in particular a high-voltage network with voltages in the range from 1000 V operating voltage.

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