WO2013171074A1

WO2013171074A1 - Electrical contact arrangement

Info

Publication number: WO2013171074A1
Application number: PCT/EP2013/059127
Authority: WO
Inventors: Thomas Hilker; Andre Singer; Horst Waage
Original assignee: Siemens Aktiengesellschaft
Priority date: 2012-05-15
Filing date: 2013-05-02
Publication date: 2013-11-21
Also published as: DE102012208140A1; EP2826049A1

Abstract

The invention concerns an electrical contact arrangement comprising a hollow cylindrical phase conductor (7, 8, 15, 21). The hollow cylindrical phase conductor (7, 8, 15, 21) is substantially hollow cylindrical. At least one aperture (11, 11a, 11b, 11c) penetrating a hollow cylinder wall of the phase conductor (7, 8, 15, 21) is disposed in the hollow cylinder wall. The aperture (11, 11a, 11b, 11c) lies in the area of intersection between a first drain (9, 9a, 9b, 9c) disposed on the inner casing side and a second drain (10, 10a, 10b, 10c) disposed on the outer casing side.

Description

Description / Description

The invention relates to an electrical contact arrangement comprising a substantially hollow-cylindrical phase conductor with a hollow cylinder wall and at least one opening passing through the hollow cylinder wall. US Pat. No. 6,175,167 B1 discloses an electrical contact arrangement. The electrical contact arrangement has a hollow-cylindrical phase conductor, which is used in an electrical switching device. The hollow cylindrical phase conductor is connected on the one hand to an overhead line and on the other hand to a switching element of an electrical switching device. The phase conductor also serves to hold and position the switching piece of the switching device. In a hollow cylinder wall of the hollow cylindrical phase conductor, a hollow cylinder wall passing through the opening is introduced. The opening in this case has comparatively large dimensions, so that rapid passage of a fluid, which is located on the inner shell side and outer shell side on the hollow cylindrical phase conductor, is made possible. The dimension of the opening is so great that the mechanical stability of the phase conductor is influenced. Accordingly, the remaining portions of the phase conductor are to be reinforced so that a sufficient mechanical strength of the phase conductor and further sufficient current carrying capacity are ensured.

Thus, it is an object of the invention to provide an electrical contact arrangement which on the one hand provides a sufficiently large cross-sectional area for the opening, the mechanical stability of the hollow-cylindrical phase conductor being only slightly influenced by the opening. According to the invention, this object is achieved in an invention of the type mentioned above in that the opening in the cutting region of a first inner shell side arranged sink and a second outer shell side arranged sink is arranged.

A hollow cylindrical phase conductor is part of an electrical contact arrangement which serves to guide an electric current. The phase conductor is correspondingly electrically contacted in order to be able to conduct an electrical current along the hollow-cylindrical phase conductor. Accordingly, an electrical potential difference has to be applied in the course of the phase conductor in order to drive an electrical current through the phase conductor.

A hollow cylindrical design of a phase conductor makes it possible, for example, to use extruded phase conductors which have an almost constant cross section over their axial extent (along the cylinder axis). It is advantageous if the phase conductor has a substantially rounded outer contour. In particular, elliptical or circular outer contours, which are designed free of jumps, have proven to be suitable. Optionally, the outer contour may have one or more recesses which undergo a dielectric shielding through the outer contour. Advantageously, the phase conductor has an annular cross-section, which can be penetrated by one depression or several depressions. The electrical contact arrangement with the hollow cylindrical

Phase conductors can be used, for example, to provide a current path to an electrical switching device or an electrical switchgear. Such a phase conductor arrangement can, for example, function as a busbar or be used as a connection current path for a further device. It can be provided that the hollow-cylindrical phase conductor is surrounded by a fluid both the inner shell side and the outer shell side. Gases like Sulfur hexafluoride or nitrogen or liquids such as insulating oils or insulating esters have been found to be suitable fluids. In particular, the fluid can be pressurized so that its electrical insulation strength is additionally enhanced. The phase conductor may be surrounded by an encapsulating housing within which the electrically insulating fluid is hermetically enclosed. A circulation of the hollow cylindrical phase conductor with the fluid thus serves on the one hand for electrical insulation of the phase conductor. On the other hand, current flow generated at the phase conductor, for example, can be dissipated and continued via flow and circulation of the phase conductor, so that inadmissible heating of the phase conductor is counteracted.

The phase conductor is per se electrically insulated from other electrical potentials, for example a ground potential. For storage, for example, a solid insulator or otherwise suitable device can be used.

The cross section of the hollow cylindrical phase conductor can be designed differently. In the axial course of a phase conductor also different cross sections can be present. For example, the phase conductor can be a hollow cylindrical

Have basic body, which may have different depressions only partially. For example, a cross-section on the inner jacket side and / or outer jacket side may have one or more depressions, which form incisions in the contour of the hollow-cylindrical phase conductor. For example, a depression may be embossed into a hollow cylindrical basic body of the hollow cylindrical phase conductor and may represent a corresponding recess in the inner shell-side or outer-shell-side surface. In particular, a depression can extend on the inner jacket side and / or outer jacket side substantially along the cylinder axis of the hollow cylinder. The depressions form cross-section-reduced sections in the hollow cylinder wall, so that the hollow cylinder sections wall is locally weakened. An indentation on the inner shell side or on the outer shell side does not yet lead to an opening in the hollow cylinder wall. When intersecting / crossing an inner shell-side and an outer-shell-side depression, drain bottoms can pass through one another, so that an opening is formed in the hollow cylinder wall in the overlap region of the two depressions. It is advantageous if the notch depth of the wells of an inner shell side and an outer shell side sink in sum is greater than the wall thickness of the hollow cylinder wall in the region of the intended opening. In particular, the hollow-cylindrical phase conductor may have substantially hollow circular-cylindrical or elliptical cross-sections, in the inner or outer contour of which corresponding depressions are embossed. The course of the depressions can be formed in different ways. For example, a depression can run in a spiral. To form an opening, the intersecting depressions should not be aligned congruently. In the overlap region of the inner direction on the inner jacket side and on the outer jacket side, the phase conductor notches depressions, an opening is formed which, depending on the profiling and notching depth of the respective sinks, may have differently shaped openings as an intersection. Profiles of a depression can, for example, be rectangular, trapezoidal, hemispherical, etc. When using multiple wells inside and outside sheath side, remain between the wells webs that separate the wells from each other. Webs can span a depression located in the opposite wall and form a stabilizing cross brace. Widening the webs can limit an opening.

By analogy, instead of the webs between the depressions remain stops which mark only a section of a trajectory of a sink. Just like the remaining webs, the stops can limit the free mobility of a component or serve as a guiding band. Advantageously, the sink can be aligned, in particular parallel to the hollow cylinder axis, so that for example in the context of a tensile or pressing process, a strand-shaped formation of the hollow cylindrical phase conductor (or a body) can be made. For example, a sink can run band-shaped z. B. in the form of a linearly stretched belt, which is arranged parallel to the cylinder axis. The band can also run helically wound and in particular encompass the cylinder axis. Thus, for example, at least one of the depressions can already be introduced into the phase conductor during extrusion of the phase conductor. Such a depression can advantageously extend in the form of a strip substantially in the direction of the cylinder axis of the hollow cylindrical phase conductor, in particular parallel to the cylinder axis or helically around the cylinder axis. A sink can be profiled as required (eg semicircular, trapezoidal, rectangular, dovetail, etc.). A further advantageous embodiment may provide that at least one of the depressions is formed as a groove in a hollow cylinder wall.

A groove has a groove profile which has a groove bottom (depression bottom) and groove flanks (guide strip). The groove forms a sink within a lateral surface. Accordingly, the groove is dielectrically shielded within the shell surface by the surface which scores it. The groove can be profiled variously. For example, the groove may be semicircular, rectangular, trapezoidal, etc. formed. The groove may extend, for example, in the direction of the cylinder axis of the phase conductor. However, it can also be provided that the groove extends substantially coaxially to the cylinder axis.

A further advantageous embodiment can provide that at least one, in particular the first and the second sink, each have a substantially strip-shaped course. , wherein the first and the second sink intersect in a projection.

A strip-shaped course of the depression makes it possible to form a depression which is impressed into the contour of the hollow-cylindrical phase conductor with relatively sharp edges. For example, in the case of a strip-shaped configuration, the extent of the depression in its longitudinal axis has a greater magnitude than the extent of the depression in its transverse direction. A strip may for example be linearly stretched parallel to the cylinder axis, closed in itself circumferentially around the cylinder axis or also helically stamped into an inner or outer circumferential surface of the phase conductor. In a projection whose projection axis differs from the cylinder axis, with a corresponding profile of the depressions, at least at one point in the hollow cylinder wall, there results a cutting region of a depression on the inner shell side and on the outer shell side into the hollow cylinder wall. With a corresponding notch depth of the depressions, the depressions overlap one another such that the depressions of the depressions pierce one another and thus an opening is formed in the hollow cylinder wall. Depending on the profiling of the sinks, so different opening cross-sections may result. For example, rectangular openings, elliptical openings, polygonal openings, etc., can result in the hollow cylinder wall, which pass through the hollow cylinder wall of the hollow cylindrical phase conductor essentially in the radial direction. Advantageously, a projection axis of a projection can cut the cylinder axis of the hollow cylindrical phase conductor.

Advantageously, for example, two oppositely helically coiled strip-shaped depressions on the inner shell side and outer shell side are arranged on the hollow cylindrical Phas senleiter, so that a multiple cutting of the inner and outer sheath side arranged depressions, so that symmetrically distributed openings in the hollow cylinder wall of the hollow cylindrical phase conductor arise. Gege- If appropriate, a plurality of helical depressions running parallel to one another can also be arranged on the inside and outside of the shell, so that the number of openings located in the hollow cylinder wall can be increased.

A further advantageous embodiment can provide that at least one groove-shaped depression is designed to be circumferentially closed around a cylinder axis of the hollow cylinder. A self-contained circulation of a sink should preferably take place azimuthally around the cylinder axis (longitudinal axis) of the hollow cylinder. An azimuthal circulation can be aligned perpendicular to the cylinder axis. A circulation can for example also take place obliquely about the cylinder axis. In this case, a closed circulation around the cylinder axis can be provided both on the inner shell side and on the outer shell side. By way of example, a depression running in the direction of the longitudinal axis forms an intersection with a self-contained depression, so that an opening is formed in the hollow cylinder wall in a simple manner. Furthermore, a plurality of axially encircling depressions can be arranged offset from one another on the phase conductor. A self-contained drain can intersect several further depressions, so that a plurality of openings are arranged in an azimuthal circulation. Thus, it is possible to convey an inflow or outflow of a fluid into or out of the phase conductor in different directions.

Furthermore, such an arrangement of depressions has the advantage that, for example, several depressions can extend parallel to the cylinder axis on the inner shell side, said depressions extending parallel to the cylinder axis being impressed into the phase conductor, for example by an extrusion process during production of a main body of the phase conductor can be. An azimuthal rotating

Depression can be introduced, for example by a cutting process, preferably outer jacket side, in the hollow cylindrical phase conductor. For example, in a Sense circular outer contour of the phase conductor is formed at a self-contained outer shell side circumferential sink a dielectrically shielded groove, which need not be further dielectrically shielded. For example, it may also be provided that further assemblies or components which are dielectrically shielded there may also protrude in such a dielectrically shielded depression. A further advantageous embodiment may provide that in an opening a bolt protrudes a component connected to the phase conductor.

A phase conductor represents a portion which serves to electrically conduct an electric current. As a rule, further components which can also be in direct contact with the hollow-cylindrical phase conductor, for example, are arranged on an electrical contact arrangement. As other components, for example, socket body, retaining fittings, guide fittings, insulators, drive elements, etc. are known. If one now uses an opening provided on the hollow-cylindrical phase conductor to allow a bolt of a component to protrude, it is possible to connect a component in a position-secure manner to the phase conductor. For example, the bolt may be complementary in shape to the cross section of the opening, so that a torsion and / or displacement safe storage of the component is given over the bolt. The bolt protrudes into the opening, so that a particular positive connection of phase conductor and component is given.

A further advantageous embodiment may provide that a securing nose of the bolt engages in a substantially opposite recess of the phase conductor.

To prevent the latch from sliding out of the opening, the latch can be equipped with a safety catch be. The securing lug is complementary in shape to a recess on the phase conductor, so that a form-fitting securing of the latch and thus of the component to the phase conductor can take place. The positive connection between the locking lug and the recess can also be superimposed by a frictional connection between the safety lug and the recess.

Furthermore, it can be advantageously provided that the opposite recess is made in a depression bottom of one of the depressions.

The opposite recess can be introduced, for example, in a sink bottom of the wells. The opposite recess can for example be formed such that in the hollow cylinder wall, a cavity is introduced, which is accessible after forming a sink, for example by means of a cutting process in the sink bottom. Thus, it is possible, for example, to extend one or more cavities provided parallel to the hollow recess of the hollow cylinder in an extrusion process in addition to the hollow recess of the hollow cylindrical phase conductor in the hollow cylinder wall. By introducing a depression on the inside of the shell or on the outside of the shell, access to the cavity located in the hollow cylinder jacket wall is made possible. By introducing a sink, whose sink bottom is lower than a wall bounding the inner cavity, creates an intersection, so that in a depression bottom of the sink a gegengleiche recess is formed, via which access to the cavity from the radial direction is possible. Thus, it is possible to let a bolt protrude through an opening of the phase conductor, wherein the latch engages with a securing lug in the opposite recess in the drain bottom. The cavity can, for example, have a circular cross-section. In order to remove the bolt from the opening, deflection or rebounding of the securing nose from the diametrically opposite recess in the phase conductor may be necessary. A further advantageous embodiment can provide that the component is surrounded by the phase conductor inside the inner shell side axially displaceable and is secured by a movement of the bolt, engaging in an azimuthal direction in an opening.

The component may extend substantially within the phase conductor, so that the phase conductor encompasses the component. Thus, on the one hand, the component is mechanically protected inside the phase conductor. On the other hand, there is the possibility to move the component axially in the hollow recess of the hollow cylindrical phase conductor. For this purpose, the phase conductor may for example have a receiving opening in which the component slides or on which the component is supported. This receiving opening may for example also be formed by a inner shell side arranged sink. Thus, the sink may serve to form an opening. On the other hand, the sink can additionally serve to guide the component. So it is easily possible to move a bolt to an opening, which is located in the serving as a receiving opening sink. Accordingly, by a movement of a bolt in the azimuthal direction, ie, in the circumferential direction of the phase conductor, the bolt can be moved into an opening, so that an axial displacement of the component is blocked. For this purpose, the bolt protrudes into an opening, wherein an axial displacement is prevented by the guide band / groove flank of the depression. In the sink bottom of an outer shell-side sink a gegengleiche recess is advantageously located, in which a locking lug of the bolt can engage. Accordingly, the bolt protrudes into the opening of the hollow cylindrical phase conductor. The assembly may have a cross-sectional shape of the hollow recess corresponding cross-section, in particular with a circular outer contour. Furthermore, it can be advantageously provided that the component is a cylindrical component. The component may in particular be a cylindrical component which can be inserted in alignment with the hollow recess of the hollow cylindrical phase conductor.

The component may for example have a substantially circular outer contour, wherein at least one in particular a plurality of symmetrically arranged hook-shaped undercuts are introduced on the circumference, so that at least one latch is formed on the outer circumference of the component. By a movement of the / the bolt (s) in the azimuthal direction can / the bolt / engage in an opening of the hollow cylinder wall and in particular cause an axial positional securing of the component.

A further advantageous embodiment may provide that the phase conductor has on the inner shell side at least one receiving opening into which a component is inserted.

An inner shell-side receiving opening can be formed, for example, by an inner shell-side depression. The depression may in particular extend in the axial direction, so that a component introduced into this depression, following the course of the depression, is arranged axially displaceable. However, it can also be provided that separate receiving openings are made on the inside of the casing. These receiving openings can, for example, also have a corresponding profiling, so that the component can be introduced into the hollow cylindrical recess of the hollow cylindrical phase conductor only in a single permissible manner. For example, a receiving opening may be introduced into the hollow cylindrical wall of the phase conductor on the face side, wherein the receiving opening extends in the direction of the axis of the hollow cylindrical phase conductor and the inner shell side is given access to the receiving opening. The up- receiving opening may extend, for example, slit-shaped in an inner circumferential surface of the phase conductor.

A further advantageous embodiment can provide that the component is mounted displaceably in the receiving opening.

A slidable mounting of the component makes it possible to arrange the component within the receiving opening at different positions. If necessary, it can be provided that, depending on requirements, a fixing of the component takes place in the receiving opening, so that its axial displaceability is limited. Furthermore, it can be advantageously provided that the receiving opening is different from a sink.

By using a sink as a receiving opening the possibility is given to dispense with additional cross-section reducing Aufnahmeoffnungen so that a sufficient cross-section is provided on the phase conductor to guide and conduct an electric current.

A further advantageous embodiment can provide that the component has at least one holding web, which engages complementary shape in the receiving opening.

A holding web is provided for guiding the component into a receiving opening in that the holding web engages in the receiving opening in a complementary shape. The receiving opening allows an axial displacement of the retaining web in the receiving opening, wherein a displacement and movement is prevented in a direction other than in the direction of the cylinder axis of the hollow cylindrical phase conductor. The receiving opening may extend, for example, like a blind hole, wherein an undercut in cross section takes place in the bottom area, so that pulling out of the holding bar from the emergency opening transversely is prevented to the cylinder axis of the hollow cylindrical phase conductor.

Furthermore, it can be advantageously provided that the phase conductor supports an interrupter unit of an electrical switching device.

An interrupter unit of a switching device is arranged in a phase conductor. By means of the interrupter unit, it is possible to generate a separation point in the phase conductor or to close this separation point. A phase conductor as well as the interrupter unit is part of the phase conductor train. As such, the phase conductor can serve as an electrical current path on the one hand and as a mechanical support element for the interrupter unit on the other hand. The interrupter unit can for example be designed substantially bottle-shaped, wherein at the end side of the interrupter unit at least on one side of a phase conductor, in particular on both sides mutually similar phase conductors are arranged. Thus, a phase conductor forms a bearing point for an interrupter unit of an electrical switching device.

Furthermore, it can be advantageously provided that the component supports a drive element of a kinematic chain of an electrical switching device.

The interrupter unit may have for producing or for canceling a separation distance relative to each other movable contact pieces. In this case, the switching pieces are to be removed from one another for generating an isolating distance and to move toward one another and to be galvanically connected in order to produce a continuous phase conductor trace. For moving at least one of the contact pieces, it is advantageous to use a kinematic chain to transmit a driving force to at least one of the contact pieces. This kinematic chain can, for example, have different machine elements. For example, waves, push rods, connecting rods, etc. can be used. If you now use the component to store operating element of the kinematic chain, so there is the possibility to take advantage of existing space within the phase conductor space to receive a drive element of the kinematic chain to guide and store. For example, this drive element may be designed in the form of a push rod, wherein the push rod is mounted displaceably substantially in the direction of the cylinder axis of the hollow cylindrical phase conductor. Accordingly, the component advantageously has a plain bearing, which allows an axial displacement of the drive element. The component may for example have an annular guide, wherein the annular guide is a bearing for a drive element in the form of a rod. A further advantageous embodiment can provide that the phase conductor is connected to the front side with a contact element which is pressed by means of a self-tapping screw against the phase conductor. To integrate the phase conductor in a phase conductor, it is advantageous to connect this with other contact elements. For example, the phase conductor may have an extruded basic body, wherein a corresponding contact element is to be flanged end-to-end for contacting the phase conductor. The contact element and the phase conductor can advantageously be screwed together by means of at least one self-tapping screw. In the hollow cylinder wall, recesses extending in the direction of the cylinder axis of the hollow cylindrical phase conductor may be provided for this purpose. The recesses may be formed in the manner of a blind hole or as a continuous recess. Advantageously, a recess provided for receiving a self-tapping screw can be used in order to also form a diametrically opposite recess for a securing nose of the bolt. In the following, an embodiment of the invention is shown schematically in a drawing and described in more detail below. FIG. 1 shows a section through an electrical contact arrangement with a first phase conductor, a second phase conductor and a first component; the

FIG. 2 is a perspective view of a third phase conductor; the

Figure 3 is a perspective view of a fourth phase conductor and a second component; Figure 4 is an end view of the fourth phase conductor with inserted second component in the displacement position; the

FIG. 5 shows the fourth phase conductor with the second inserted

Component in locking position; the

Figure 6 is an end view of a fifth phase conductor; Figure 7 is an end view of a third component;

the

FIG. 8 shows the third component used in the fifth phase conductor; the

FIG. 9 shows the third component in a perspective view;

the

FIG. 10 a perspective view of the fourth phase conductor with inserted third component in section.

FIG. 1 shows a section through an electrical switching device in the form of a high-voltage circuit breaker. provides. The high-voltage circuit breaker has an encapsulating housing 1, which receives in its interior an electrically insulating fluid, preferably an electrically insulating gas, in particular under overpressure. In the present case, the encapsulating housing 1 has a substantially tubular insulating body 2, which is delimited on the face side by a first socket body 3a and a second socket body 3b. The first socket body 3a closes one end face of the insulating body 2. The second socket body 3b makes it possible to connect a further component, for example a further insulating body, to the insulating body 2. Both via the first socket body 3 a and via the second socket body 3 b, electrical contacting of a sub-breaker unit arranged inside the encapsulating housing 1 is made possible. In the present case, the interrupter unit has a first contact piece 4 and a second contact piece 5. The switching pieces 4, 5 are movable relative to each other, wherein the first contact piece 4 socket-shaped and the second contact piece 5 is bolt-shaped, so that the second contact piece 5 for making an electrically conductive connection in the first contact piece 4 is retractable. The two switching pieces 4, 5 are in the contacted state by a relative movement of the switching pieces 4, 5 removed from each other, so that adjusts an isolating distance between the switching pieces 4, 5. In the present case, the two switching pieces 4, 5 are additionally equipped with arc switching pieces 6a, 6b, which serve to guide switching arcs and the switching pieces 4, 5 protect against contact erosion. For positioning of the two contact pieces 4, 5 and the

Arc switching pieces 6a, 6b, a first phase conductor 7 and a second phase conductor 8 are provided. The two phase conductors 7, 8 are each formed substantially hollow cylindrical. The two phase conductors have a substantially circular envelope contour. The cylinder axes of the hollow cylindrical phase conductors 7, 8 are aligned coaxially with each other, wherein the phase conductors 7, 8 are arranged spaced from each other end face. The first phase conductor 7 is at its end facing away from the switching pieces 4, 5 of the interrupter unit attached to the first socket body 3a and supported by the first socket body 3a, so that the first phase conductor 7 projects freely in the direction of the second phase conductor 8. The second phase conductor 8 is mounted at its end remote from the switching pieces 4, 5 end on the second socket body 3b, so that the second phase conductor 8 projects freely in the direction of the first phase conductor 7. At the mutually facing free ends of the two phase conductors 7, 8, respectively the switching pieces 4, 5 are positioned. The two phase conductors 7, 8 are stored stationary, so that only necessary for the production of a switching path or to cancel a switching path switching pieces 4, 5 and

Move arc contact pieces 6a, 6b.

The first phase conductor 7 has several similar depressions 9 on the inside of the casing. The depressions 9 are arranged on the inner shell side, and preferably formed with a rectangular or trapezoidal cross-section like a groove linearly stretched. The depressions 9 are aligned substantially parallel to the cylinder axis of the hollow cylindrical phase conductor 7. Furthermore, depressions 10 are arranged on the outer side of the first phase conductor 7. The outer shell-side depressions 10 are provided, for example, with a rectangular groove profile, wherein the outer shell-side depressions 10 circulate azimuthally closed around the cylinder axis of the hollow cylindrical phase conductor 7. The notch depth of the inner shell-side depressions 9 and the outer shell-side depressions 10 is greater in total than the wall thickness of the substantially hollow cylindrical phase conductor. In the region of the intersections of inner shell-side depressions 9 and outer shell-side depressions 10 thus the hollow cylinder wall of the first phase conductor 7 openings 11 are arranged. In the present case, both the inner shell side depressions 9 and the outer shell side depressions 10 are provided with a substantially rectangular groove profile, so that the forming openings 11 in the hollow cylinder wall of the first phase conductor 7 has a substantially rectangular cross section exhibit. Via the openings 11, it is possible to allow the fluid enclosed in the interior of the encapsulating housing 1 to pass through the first phase conductor 7. The second phase conductor 8 has a similar construction as the first phase conductor 7. Also, the second phase conductor 8 is formed substantially hollow cylindrical, with inner shell side depressions 9 are arranged. The inner-shell-side depressions 9 are, like the first phase conductor 7, linearly elongated grooves, which are aligned essentially parallel to the cylinder axis of the hollow-cylindrical phase conductor 8. Furthermore, outer jacket-side depressions 10 are also provided on the second phase conductor 8. The outer-side depressions 10 surround the second phase conductor 8 on the outer jacket side and run closed in the azimuthal direction. In one of the outer shell-side depressions 10 on the second phase conductor 8, a first component 12 is inserted. The first component 12 is inserted into the hollow recess of the second hollow-cylindrical phase conductor 8 and fixed in an outer casing-side depression 10 via a plurality of bars which pass through the openings (see analogous embodiment according to FIGS. 3, 4 and 5). The first component 12 has centrally a bearing opening 13. In the bearing opening 13, a shift rod 14 with complementary shape cross section to the bearing opening 13 is slidably mounted. The

Shift rod 14 has in the present case a hollow cylindrical profile, whose cylinder axis is aligned coaxially with the cylinder axis of the second hollow cylindrical phase conductor 8. Via the bearing opening 13 in the first component 12, a centric guidance of the axially movable switching rod 14 is made possible. Via the switching rod 14, a relative movement of the switching pieces 4, 5 to each other is initiated. The first component 12 is fixed in position on the second phase conductor 8. Between the several inner shell side and outer shell side arranged depressions 9, 10 remain webs. The webs separate the respectively adjacent inner and outer shell side arranged depressions 9, 10. In this case, the innenmantel- side webs, the outer shell-side depressions 10 and vice versa, the outer shell-side webs span the innenman- side troughs 9, with drain bottoms are each on the webs.

FIGS. 2 to 10 show various design variants of hollow-cylindrical phase conductors and of components. These design variants can be used, for example, in the electrical switching device according to FIG.

FIG. 2 shows a perspective view of a third phase conductor 15, which has a hollow-cylindrical shape and-like the first and second phase conductors 7, 8-has a substantially circular cross-section. The third phase conductor 15 extends coaxially to a cylinder axis 16, inner shell-side depressions 9a being arranged on the inner shell side on the third phase conductor 15. In the present case, the inner shell-side depressions 9a are configured as linear grooves which run parallel to the cylinder axis 16. Between the grooves 9a webs remain, in which the front side recesses 17 are introduced. The recesses 17 are used to connect the third phase conductor 15 as an electrical contact arrangement with other bodies, such as valve bodies or contact elements. The recesses 17 in the end face of the third phase conductor 15 may be threaded to connect further bodies to the third phase conductor 15. However, it can also be provided that self-tapping screws can be screwed into the recesses 17, so that a thread forms on the inner shell side of the recesses 17. A production of the third phase conductor 15 (as well as the other phase conductor configurations) can be carried out, for example, in the context of an extrusion process, so that the outer contour and the inner circumferential surface of the third phase conductor 15 are impressed in a working process. Likewise, the recesses 17 can be formed as part of an extrusion process. Depending on requirements, the profiling of the inner shell-side depressions 9a can be designed in various ways. In the present case, the inner casing-side depressions 9a have an approximately trapezoidal profile, wherein the inner casing-side depressions 9a can also be referred to as dovetail-shaped grooves.

On the outer shell side, azimuthal circumferential depressions 10a are introduced in the third phase conductor 15, which circumscribe themselves around the cylinder axis 16 on the outer jacket side. The outer shell-side depressions 10a have a substantially rectangular profile, with groove flanks of the outer shell-side depressions merging rounded into the remaining outer circumferential surface of the hollow-cylindrical phase conductor 15. The notch depth of the inner shell-side depressions 9a and the outer shell-side depressions 10a is in this case so large that openings IIa are formed in the region of the intersections of inner shell-side depressions 9a and outer-shell-side depressions 10a.

In the present case, the openings IIa each have a substantially rectangular cross-section, which allows flow of a fluid out of the hollow recess of the hollow-cylindrical third phase conductor 15 in its surroundings and vice versa. The webs 9a, 10a remaining between the inner and outer sheath side remaining webs are still materially connected to each other and stabilize each other. In particular, the webs extending in the axial direction on the inner shell side between the inner shell-side depressions 9a can serve to transmit an electric current. On the end faces a coupling or decoupling of a current flowing through the phase conductor 15 electrical current is made possible.

Deviating from the embodiment of the third phase conductor 15 shown in FIG. 2, FIG. 3 shows a fourth phase conductor 18, which is likewise essentially hollow cylindrical, wherein the profiling of the inner and outer jacket side arranged depressions 9b, 10b deviates. In the present case, the fourth phase conductor 18 is aligned coaxially with a cylinder axis 16. Inner shell side are axially extending inner shell-side depressions 9 b arranged, which extend parallel to the cylinder axis 16. On the outer shell side, an outer shell-side depression 10b is arranged by way of example in FIG. The outer shell-side depression 10b runs closed around the cylinder axis 16 in itself. In an intersection region between inner shell-side and outer-shell-side depressions 9b, 10b, openings IIb result. Recesses 17b are arranged in the end faces of the webs remaining between the inner shell-side depressions 9b. The recesses 17b protrude in the axial direction in the fourth phase conductor 18 and enforce it from its entire length. In the openings IIb delimiting webs, which remain as sink bottoms in the outer shell-side depression 10b, a radial access to the recesses 17b is given. Radially accessible counter-recesses 19 are thus formed in the depression bottoms of the outer shell-side depressions 10b.

The second component 12a shown in FIG. 3 is substantially cylindrically shaped, wherein the second component 12a has a circular outer contour. The circular outer contour is pierced by recesses on the shell side, so that the radial arms remaining between the recesses can be inserted complementary to the shape in the inner shell-side depressions 9b in the direction of the cylinder axis 16. The cylinder axis 1b of the second component 12a and the fourth phase conductor 18 are aligned coaxially. Centrically, the second component 12a is penetrated by a bearing opening 13. For the formation of radially outwardly projecting arms with bolts 20 recesses with undercuts are arranged on the outer circumference. The bars 20 are hook-shaped in the circumferential direction. At the free ends of the latch 20 locking lugs are attached in the form of thickening. Wherein the securing lugs form complementary to the opposite recesses 19 in the depression bottom of the outer shell-side depression 10b are configured. FIG. 4 shows an example of insertion of the second component 12a into the fourth phase conductor 18. The arms of the second component 12a are complementary in shape to the inside shell-side depressions 9b in the manner of a piston, so that the second component 12a can be displaced in the axial direction. With the achievement of an outer shell side arranged sink 10b, it is possible, the latch 20, which are located on the arms of the second component 12a, by rotation of the second member 12a about its cylinder axis through the openings IIb cross on the remaining between the inner shell side depressions 9b webs postpone. Accordingly, the locking lugs of the latch 20 engage in the local complementary recesses 19. Thus, an axial displacement of the second component 12a is prevented. The bars 20 project into the openings IIb in the cylinder wall of the fourth phase conductor 18. The locking lugs lie in the opposite recesses 19 (see Fig. 5).

FIG. 6 shows a further possibility of a cross-sectional configuration of a fourth phase conductor 21. The fourth phase conductor 21 has inner-shell-side depressions 9c, which have essentially dovetail-shaped cross-sections, the webs remaining between the inner-shell-side depressions 9c being provided with receiving openings 22. The receiving openings 22 extend in the axial direction through the respective web, wherein the recess is provided with an undercut. Such a construction can also be formed in the fourth phase conductor 21 in the context of an extrusion process for producing the fourth phase conductor 21, for example.

FIG. 7 shows a third component 12b, which can be produced, for example, as a one-piece cast part. The third component 12b may, for example, be made of a plastic as an electrically insulating component or of a metal casting as an electrically conductive component. In addition to a one-piece design of a component, a component may also have a plurality of substances, and constructed in several parts be. In the present case, the third component 12b is equipped with an inner circular cylindrical hollow cylinder, and equipped with an inner cylinder enclosing the inner circular cylindrical hollow cylinder. Inner cylinder and outer cylinder are arranged via webs coaxially to each other. On the outer circumference, the third component 12b is equipped with support arms 23 shaped in a shape complementary to the cross sections of the receiving openings 22. According to FIG. 8, the support arms 23 can be inserted in shape-complementary receiving openings 22 of the fourth phase conductor 21, wherein insertion from the frontal direction should take place in the direction of the cylinder axis of the fourth phase conductor 21. Thus, it is possible to slidably mount the third member 12b in the direction of the cylinder axis of the fourth phase conductor 21 and to pass it to its destination. Upon reaching the destination, the third component 12b can also be fixed in place. Deviating from this, in the exemplary embodiment according to FIGS. 3, 4 and 5, the inner sleeve-side recesses 9 b are used to form a receiving opening for guiding the components there in the axial direction to provide. FIG. 9 shows a perspective view of the third component 12b. It can be seen that the inner hollow cylinder has a smaller axial extension in the direction of its cylinder axis than the encompassing hollow cylinder, wherein the wall thickness of the inner hollow cylinder is greater than the wall thickness of the encompassing hollow cylinder.

FIG. 10 shows a section through the perspective view of the fourth phase conductor 21, wherein in the perspective view of FIG. 10 the layers of outer shell-side depressions 10c can be seen. Regardless of the use of the third component 12b would be a use of an analogous manner to the second component of the figures 3, 4 and 5 constructed component 12a on the fourth phase conductor 21 possible.

The embodiments shown in the figures represent purely borrowed schematically embodiments of the invention. In addition, modifications are possible. For example, the profile of the sinks can be made variable. Furthermore, the position of the depressions on the respective phase conductor can vary. Deviating from an orthogonal position to the cylinder axis, for example, self-contained countersinks can circulate on the outer conductor or on the inner jacket side on the phase conductor ("oblique rings".) In addition, the course of the depressions aligned in the axial direction can also be provided coiled. For example, provision may also be made for helically provided, strip-shaped depressions to be provided on both the inside and outside of the jacket, and corresponding openings are formed in the respective intersection regions, which allow a fluid to pass from the inner jacket side of the phase conductor to an outer jacket side of the phase conductor (and vice versa). enable.

Claims

Claims / Patent Claims

1. Electrical contact arrangement comprising a substantially hollow cylindrical phase conductor (7, 8, 15, 21) with a hollow cylinder wall and at least one hollow cylinder wall passing through the opening (11, IIa, IIb, 11c),

d a d u r c h e c e n c i n e s that

the opening (11, IIa, IIb, 11c) in the intersection of a first inner shell side arranged sink (9, 9a, 9b, 9c) and a second outer shell side arranged sink (10, 10a, 10b, 10c) is arranged.

2. Electrical contact arrangement according to claim 1

d a d u r c h e c e n c i n e s that

at least one of the depressions (9, 9a, 9b, 9c; 10, 10a, 10b, 10c) is formed as a groove in a hollow cylinder wall.

3. The electrical contact arrangement according to claim 1 or 2, characterized in that a

at least one, in particular the first and the second sink

(9, 9a, 9b, 9c; 10, 10a, 10b, 10c) each having a substantially strip-shaped course, wherein the first and second sink (9, 9a, 9b, 9c, 10, 10a, 10b, 10c) in a projection intersect each other.

4. Electrical contact arrangement according to one of claims 1 to 3,

d a d u r c h e c e n c i n e s that

at least one groove-shaped depression (10, 10a, 10b, 10c) closed in itself around a cylinder axis (16) of the hollow cylinder is formed.

5. Electrical contact arrangement according to one of claims 1 to 4,

d a d u r c h e c e n c i n e s that

in an opening (11, IIa, IIb, 11c), a bolt (20) of a with the phase conductor (7, 8, 15, 21) connected to the component (12, 12a, 12b) protrudes.

6. Electrical contact arrangement according to one of claims 1 to 5,

d a d u r c h e c e n c i n e s that

a securing nose of the bolt (20) engages in a substantially diametrically opposite recess (19) of the phase conductor (7, 8, 15, 21).

7. Electrical contact arrangement according to claim 6,

d a d u r c h e c e n c i n e s that

the diametrically opposite recess (19) is introduced into a depression bottom of one of the depressions (9, 9a, 9b, 9c; 10, 10a, 10b, 10c).

8. Electrical contact arrangement according to one of claims 5 to 7,

d a d u r c h e c e n c i n e s that

the component (12, 12a, 12b) of the phase conductor (7, 8, 15, 21) encompassed axially slidably guided on the inner shell side and by a movement of the bolt (20) in the azimuthal direction in an opening (11, IIa, IIb, 11c ) is comprehensively secured.

9. Electrical contact arrangement according to one of claims 5 to 8,

d a d u r c h e c e n c i n e s that

the component (12, 12a, 12b) is a cylindrical component (12, 12)

12a, 12b).

10. Electrical contact arrangement according to one of claims 1 to 9,

d a d u r c h e c e n c i n e s that

the phase conductor (7, 8, 15, 21) has on the inner shell side at least one receiving opening 22 into which a component (12, 12a, 12b) is inserted.

11. Electrical contact arrangement according to claim 10,

characterized in that the component (12, 12a, 12b) is displaceably mounted in the receiving opening (22).

12. An electrical contact arrangement according to claim 10 or 11, characterized in that a

the receiving opening (22) is different from a sink (9, 9a, 9b, 9c, 10, 10a, 10b, 10c).

13. Electrical contact arrangement according to claim 10 to 12, d a d e r c h e c e n e c i n e that t

the component (12, 12a, 12b) has at least one retaining web which engages complementary in shape in the receiving opening (22).

14. Electrical contact arrangement according to one of claims 1 to 13,

d a d u r c h e c e n c i n e s that

the phase conductor (7, 8, 15, 21) supports an interrupter unit of an electrical switching device.

15. Electrical contact arrangement according to one of claims 5 to 14,

d a d u r c h e c e n c i n e s that

the component (7, 8, 15, 21) supports a drive element (14) of a kinematic chain of an electrical switching device.

16. Electrical contact arrangement according to one of claims 1 to 15,

d a d u r c h e c e n c i n e s that

the phase conductor (7, 8, 15, 21) is frontally connected to a contact element which is pressed by means of a self-tapping screw against the phase conductor (7, 8, 15, 21).