EP3267534A1 - Connection adapter for connection of an electrical unit with connecting means of an electrical unit and corresponding system and electrical equipment - Google Patents

Abstract

The invention relates to a connection adapter (1) for connecting an electrical device, in particular a coupler for powerline communication, to a connection means (18) of an electrical system, wherein the connection adapter (1) has a base body (2). In the base body (2) a recess (3) for at least partially enclosing the connection means (18) and a device connection for connecting the electrical device are formed, wherein the device connection in a direction perpendicular to an axis (5) of the recess (3) of the recess (3) is spaced. In the recess (3) is a clamping tongue (4) is formed, which is formed with mounted connection adapter (1) for exerting a clamping force on the connection means (18).

Description

The present invention relates to a connection adapter for connecting an electrical device to a connection means of an electrical system, as well as a corresponding system and a corresponding electrical system.

In powerline communication systems, a power supply network is used to exchange communication signals between the participants in the system. The data to be transmitted is modulated in the higher frequency range on one or more lines of the power supply network, for example, a phase relative to the neutral or between two phases. For example, the broadband variant of Powerline Communication - Broadband Powerline (BPL) - often uses signal components in the frequency range between 1 and 30 MHz. For coupling the communication signals to the lines of the power supply network or for decoupling transmitted via the power supply network communication signals couplers are used, which also keep the relatively high line voltage of the power supply network of the communication unit. The couplers are usually capacitive couplers that are dimensioned so that the low-frequency network voltage of the power supply network is significantly reduced or even completely blocked and the communication signals are passed largely unchanged.

1. 1. Das Gewinde der Anschlussschraube muss ausreichend lang sein, um alle für den Anschluss notwendigen Komponenten tragen zu können.
2. 2. Das überstehende Gewinde muss nach vorne zeigen, d.h. es muss für die Installation des Kopplers zugänglich sein.

To connect such a coupler, it is widely used to connect the connection cable of the coupler with connection means of an electrical system, which in turn is connected to the power supply network. Frequently, a cable lug, usually a ring cable lug, attached to the respective connection cable of the coupler, which is connected to one of the terminals of the electrical system. For example, refer to a low-voltage high-performance fuse load bar - in short NH fuse load bar. Such a connection scenario is in the FIGS. 1 and 2 shown. The connection means is formed here by an M12 screw or an M12 threaded bolt or a nut screwed thereon, whereby other screw or thread sizes are common, for example M8. A cable lug (A) of a high-voltage cable (B) is connected to the M12 screw or M12 threaded bolt by means of a first nut (C). In Fig. 2 In addition, a second nut (D) is provided on the M12 screw / M12 threaded bolt securing the first nut (C). The connecting cable (E) of the coupler has a cable lug (F) attached with a special nut (G). All these components, ie the cable lug (A) of the high voltage cable (B), the first and second nuts (C, D), the cable lug (F) of the coupler connection cable (E) and the special nut (G) are on the M12 -Screw or the M12 threaded bolt arranged. It can be seen that two conditions must be fulfilled for this connection option:

1. 1. The thread of the terminal screw must be long enough to carry all components necessary for the connection.
2. 2. The protruding thread must point to the front, ie it must be accessible for the installation of the coupler.

In many installations, however, not both of these - trivial-sounding - requirements are met, since such systems are usually designed only for the connection of a high-voltage cable. So often the remaining thread is too short to ensure a secure and reliable attachment of the connection cable of the coupler to the screw. The second requirement is not met in many electrical systems, since the screws are installed in the direction of the electrical system and the thread is thus inaccessible for further installation. If only one of the two requirements is not fulfilled, extensive conversion measures are necessary to create the installation prerequisites. These conversion measures are time-consuming and therefore cost-intensive. Furthermore, the usual installation on a live system for safety reasons is excluded for the conversion, so that the electrical system for the renovation work must be turned off, which further increases the cost.

Another problem with using the special nut described above is the need for a relatively large amount of space. In addition to the space for the special nut space for the second nut is required. At the same time, a minimum distance to the housing wall, in the present case usually a housing door, must remain. This installation space is not available in all installation situations.

Although the above statements relate to the connection of a BPL coupler to a NH fuse-load bar, it will be appreciated by those skilled in the art that the above-described problem may arise in a wide variety of scenarios where an electrical device is connected directly or via electrical equipment attachment means a power supply network is to be connected. In this case, the power supply network can both low voltage, i. AC voltages up to 1000 V, as well as medium voltage, i. AC voltages above 1000 V to 52 kV lead. Also, the connection means need not necessarily be a screw connection, even if this has prevailed in the field of energy supply as a quasi standard. It is usually sufficient if the connection means is substantially prism-shaped, wherein the outer cross-section - to name just a few examples - can be round, hexagonal or square.

The present invention has for its object to provide a connection option for an electrical device to a connection means of an electrical system, which avoids complex reconstruction measures, has the smallest possible space and allows a simple and secure connection of the electrical device.

According to the invention the above object is solved by the features of claim 1. Thereafter, the connection adapter in question comprises a base body, wherein in the base body a recess for at least partially enclosing the connection means and a device connection for connecting the electrical device are formed, wherein the device connection is spaced in a direction perpendicular to an axis of the recess of the recess , wherein in the recess a clamping tongue is formed, which is formed with mounted connection adapter for exerting a clamping force on the connection means.

With regard to a system and an electrical system, the above object is achieved by the features of claims 12 and 16.

In accordance with the invention, it has initially been recognized that, even in very tight installation situations, there is always sufficient space for handling the connection means is available. In the case of an M12 screw or an M12 nut, this means that at least as much space is available that a suitable socket of a socket set can be placed on the M12 nut and thus the nut can be tightened or loosened. Since this space only has to be freely accessible when changes are made to the high-voltage cables connected to the connection means, this space is available for the connection of an electrical device. According to the invention, therefore, a connection adapter is provided which uses this space and allows the electrical device to be connected to the connection means.

According to the invention, the connection adapter has a base body in which a recess is formed. This recess is designed to at least partially enclose the connection means when the connection adapter is mounted. In this way - with a suitable adaptation of the recess on the connection means - a positive connection between the connection means and connection adapter can be achieved. This means that movements in directions perpendicular to an axis of the recess are largely prevented. In most cases, this axis will be parallel to the direction in which the connection means is guided in the recess during assembly. This axis can also be an axis of symmetry of the recess. For an M12 nut, for example, this axis may be a point symmetry axis.

For securely holding the connection adapter on the connection means, a clamping tongue is formed in the recess, which can exert a clamping force on the connection means in the case of a mounted connection adapter. As a result, in the mounted state of the connection adapter, a frictional connection between connection adapter and connection means can be produced.

For connecting the electrical device to the connection adapter, a device connection is formed on the base body. This device connection is formed in a direction perpendicular to the axis of the recess spaced from the recess. Thus, the extension of the terminal adapter in a direction parallel to the axis of the recess can be kept small. Overall, this results in a space-saving and at the same time secure connection possibility of the electrical device to the connection means of the electrical system.

The connection means of the electrical system can be formed in various ways. In principle, each electrically conductive body, which is part of the electrical system and is connected to a conductor of a power supply network, suitable as a connection means. However, prism-shaped connection means are particularly well suited, since a large contact area between connection means and connection adapter can be realized there. This in turn favors the frictional connection between connection means and connection adapter caused by the clamping tongue. In this case, this prism-shaped connection means may have smooth surfaces or be structured. The base of the prism-shaped connection means may be round, square or octagonal or have a different polygonal shape. However, particularly preferred connection means are formed by hexagonal screw heads, cylindrical screw heads (for example, hexagon socket screws) or hexagonal screws. Such a screw or nut may have a variety of dimensions. Metric screws are usable as well as Zöllische. Most preferably, however, the screws are metric screws, most preferably using an M12 or M8 screw.

The electrical system can be formed by a variety of systems. In this case, the electrical system should be connected to a power supply network, wherein the power supply network can be both a geographically widespread network and an island network. The power supply network may be a low voltage network or a medium voltage network. Most preferably, the electrical system is a system that is used in the distribution of electrical energy, such as a NH fuse load bar, a switchgear or a transformer.

Also with regard to the connectable electrical device, there is hardly any restriction. However, with regard to the current that flows via the connection adapter to or from the electrical device, a restriction makes sense. Usually the flowing streams should not be too big. For example, currents in the double-digit ampere range may be unfavorable in many application scenarios. Preferably, the connection adapter according to the invention is used for connecting a coupler for power line communication, in particular a BPL coupler, or a meter. There, the flowing streams are relatively small and usually move well below one ampere.

With respect to the material of the connection adapter as few requirements are required. It is essential that the connection adapter is made of a conductive material or that at least the inside of the recess and / or the clamping tongues is / are electrically conductively connected to the device connection. By way of example, but not limited to this list, attention is drawn to the use of steel, in particular 8.8 steel, aluminum, brass or a conductive polymer. In particular, when used with a BPL coupler or other electrical device that is to receive and / or transmit higher frequency signals, it is also recommended to avoid a jump in the characteristic impedance that the conductivity of the material of the connection adapter is approximately as large as the conductivity of the connection means. The conditions are particularly favorable if the connection adapter consists of the same material as the connection means. Since the connection adapter will usually be manufactured for known connection scenarios, the expected material of the connection means is usually known and thus easy to realize these conditions in practice. A similar material between connection means and connection adapter is also recommended for the prevention of galvanic corrosion, especially if the electrical system, for example, can be found in the outdoor area of a road distributor and a high humidity is expected.

In principle, the device connection for connecting the electrical device can be formed in various ways. It is essential only that the device connection allows a secure connection of the electrical device to the connection adapter. In a particularly preferred embodiment of the device connection, however, this is formed by a first bore in the base body. In this way, a connection cable of the electrical device can be connected by means of a screw to the connection adapter, so that in this way a device connection is formed. This succeeds particularly well if an internal thread is formed in the first bore, which extends at least over parts of the first bore. In this case, a screw for attaching a connecting cable of the electrical device screwed into this internal thread in the first hole and thus a particularly simple and secure connection of the Connecting cable of the electrical device can be achieved with the connection adapter.

The axis of such a first bore is preferably arranged substantially parallel to the axis of the recess. This arrangement results in very many installation scenarios, a particularly favorable handling of the connection adapter and it is a simple installation favors.

In the embodiment of the device connection through a first bore, the spacing of the device connection from the recess can be achieved in that the first bore and the recess do not intersect. In the case of a first bore formed parallel to the axis of the recess, this means that, in a plan view of the connection adapter, the recess and the first bore are separated from each other at least by a material web.

To secure the clamping tongue in the mounted state, a second bore may be formed on a side of the clamping tongue facing away from the recess, wherein an internal thread is formed at least in parts of the second bore. In this second hole, a screw, such as a grub screw can be screwed. This screw in the second bore can ensure that the clamping tongue can not be further moved away from the recess. In a particularly preferred embodiment, however, the side facing away from the recess of the clamping tongue is formed such that a screw screwed in the second bore screw moves the clamping tongue in the direction of the recess. In this way, the clamping force with which the connection adapter is held in a force-locking manner on the connection means can be increased. This can be achieved, for example, by thickening the clamping tongue from its base to its tip and thus tapering the second bore in the direction of the clamping tongue tip.

In a further development of the connection adapter according to the invention, the recess is substantially annular. This means that the border, which bounds the recess, is closed and possibly interrupted by the clamping tongue. In this way, particularly effective and reliable clamping forces can be applied to the connection means.

The recess may in principle be closed, i. There is a bottom formed in the recess, which completes the recess in one direction completely or at least largely. This embodiment offers the advantage that increased stability can be achieved. However, since in many installation situations, especially when mounting the connection adapter on a nut, the necessary "depth" of the recess for a reliable installation can not be estimated, the recess may be formed as a passage in a particularly preferred embodiment. In this embodiment, the expansion is open to both sides, i. both to the mounted in the state of the connection means side facing as well as the side facing away from the connection means. In this way, the connection adapter can fully encompass the connection means, while any existing threaded parts or other protruding elements can pass through the implementation.

To further favor the stability of the connection adapter this could be integrally formed. This means that the main body, the clamping tongue and the device connection are formed from a piece of conductive material. This can be achieved, for example, by milling out the connection adapter from a solid block. However, such a one-piece connection adapter can also be produced by injection molding. Various methods for producing such one-piece connection adapters are well known in practice. Which method of manufacture makes sense usually results from the number of adapters to be manufactured. For small quantities, for example, a production using CNC (Computerized Numerical Control) machines is recommended. For large quantities, the production of an injection molding tool is worthwhile because injection molding can be used much faster and more cost-effectively.

In principle, the clamping tongue could extend within the recess in a variety of ways. Thus, it would be conceivable that the clamping tongue extends along the edge of the recess. In a particularly preferred manner, however, the clamping tongue extends in a direction parallel to the axis of the recess. This means that the clamping tongue is connected on one side to the base body and spaced at the top of the "rest" of the body is. Preferably, the clamping tongue is spaced on the side facing the connection means in the assembled state of the connection adapter.

In one development, the main body has a lower side and an upper side, wherein the lower and upper sides are preferably arranged parallel to one another. In this case, lower and upper side are also preferably formed perpendicular to the axis of the recess. Such a configuration can be used as a feedthrough both in the case of a closed recess and in the case of an embodiment of the recess. In both cases, the connection adapter of this embodiment can be made particularly simple. In this case, preferably the underside in the mounted state faces the connection means or the electrical system, while the upper side points to "outside". The top would then in the assembled state, for example, in the Fig. 1 and 2 illustrated connection situations, remain visible.

If the clamping tongue extends in a direction parallel to the axis of the recess and at the same time the main body has an upper and a lower side, the clamping tongue is preferably connected at the top to the base body, while the clamping tongue spaced from the base formed at the bottom is. This means that the base of the clamping tongue is on the side of the clamping tongue, which is closer to the top, while the tip of the clamping tongue is in the region of the bottom.

The clamping tongue itself can be designed in various ways. It is essential that the clamping tongue is designed such that it can be brought at least slightly from a rest position to a tense position. The rest position is defined by the fact that no external force acts on the clamping tongue. The tensioned position is present when the clamping tongue exerts a force directed in the direction of the recess. In this way, a clamping force in the assembled state can be applied to the connection means. This directed in the direction of the recess force can be achieved in various ways. Thus, it is conceivable that a spring force with which the clamping tongue strives back from a deflected position into the rest position, this applied in the direction of the recess force applies. But it is also conceivable that directed in the direction of the recess force by screwing a Screw is applied in an existing at the clamping tongue second bore.

The shape of the clamping tongue is relatively arbitrary. Linear edges of the clamping tongue are just as conceivable as curved edges. It is essential that the clamping tongue is suitable for generating a sufficient clamping force on the connection means. Any shape of the clamping tongue that meets this requirement is thus - at least in principle - suitable. Preferably, however, the clamping tongue is substantially rectangular or trapezoidal in shape. In a trapezoidal configuration, the clamping tongue preferably tapers from the base of the clamping tongue to its tip.

To increase the holding force may be formed on the recess facing side of the clamping tongue profiling. The profiling can be formed in various ways. By way of example only, but not limited to, reference is made to the formation of a profiling by a series of teeth, strips, serrations or indentations. This profiling can help that a force acting on the connection adapter in the direction parallel to the axis of the recess force can be better dissipated and thus the connection adapter can not or significantly harder to pull from the connection means. On the other hand, the profiling can help to break any oxidation present on the connection means, so that the electrical contact between connection means and connection adapter is improved. This is especially advantageous in the case of high-frequency signals.

In addition, a corresponding profiling can be provided on the inside of the recess. It would be conceivable, for example, to provide a profiling on the side of the recess opposite the clamping tongue. The profiling on the recess can be configured identically to the profiling on the clamping tongue. However, there may also be applications in which the profiles deviate. Thus, for example, the clamping tongue having a profiling with a plurality of lozenge-shaped teeth, while the recess is profiled with lines that extend for example perpendicular to the axis of the recess.

To improve the mountability, a clamping nose can be formed at the tip of the clamping tongue. This clamping nose is preferably formed by a mandrel, a hook or a survey. In this case, the clamping lug is designed such that the clamping tongue increases in the region of the clamping lug in the direction of the recess, so that the distance formed between the clamping lug and the opposite wall of the recess is reduced. In this way it is possible, for example, to achieve an increased biasing force of the clamping tongue. For example, if the connection means is formed by a nut, so the clamping nose could be arranged such that the clamping lug is located in the region of an axial chamfer of the mother and thus favors after attaching the connection adapter to the nut clamping of the clamping tongue on the connection means.

To promote the smallest possible space requirement of the main body is preferably flat. This means that the base body has a significantly smaller extent in a first direction parallel to the axis of the recess than in a second direction perpendicular to the first direction. Preferably, the extent in the first direction is at least three times smaller than the extent in the second direction. If, for example, lower and upper side are formed on the connection adapter, this would mean that the distance between lower and upper side would amount to a maximum of one third of the extension in a direction parallel to the lower or upper side. In this way, a particularly space-saving connection adapter can arise.

To further increase the clamping action, the cross-section of the recess may be tapered in a direction parallel to the axis of the recess. This means, for example, that the connection means can still be received relatively easily on an underside of the connection adapter, while the boundary of the recess would approach closer to the connection means with increasing distance from the underside. The rejuvenation can take place continuously or in sections. Thus, a taper in the underside of the lead to the fact that the connection adapter can be particularly easily plugged onto the connection means and at the same time a reliable positive connection between the connection adapter and connection means is reached. A continuous taper means that even with very large tolerances of the connection means nevertheless a position can be found at which a positive fit or traction is possible.

Fig. 1

eine typische Installationssituation bei einer elektrischen Anlage,

Fig. 2

eine bekannte Anschlussmöglichkeit eines elektrischen Gerätes mit einer Spezialschraube gemäß Stand der Technik in der Installationssituation nach Fig. 1,

Fig. 3

eine Schrägansicht eines ersten Ausführungsbeispiels eines erfindungsgemäßen Anschlussadapters mit Blick von oben,

Fig. 4

eine andere Schrägansicht des erfindungsgemäßen Anschlussadapters gemäß erstem Ausführungsbeispiel mit Blick von unten,

Fig. 5

eine Draufsicht von oben auf einen erfindungsgemäßen Anschlussadapter gemäß einem zweiten Ausführungsbeispiel einschließlich einer beispielhaften Bemaßung,

Fig. 6

eine Draufsicht von unten auf den Anschlussadapter gemäß zweitem Ausführungsbeispiel,

Fig. 7

eine Seitenansicht des Anschlussadapters gemäß zweitem Ausführungsbeispiel einschließlich einer beispielhaften Bemaßung,

Fig. 8

eine andere Seitenansicht des erfindungsgemäßen Anschlussadapters gemäß zweitem Ausführungsbeispiel einschließlich einer beispielhaften Bemaßung,

Fig. 9

eine Schrägansicht eines dritten Ausführungsbeispiels eines erfindungsgemäßen Anschlussadapters, wobei im Vergleich zu dem zweiten Ausführungsbeispiel ergänzend auf der Klemmzunge eine Profilierung ausgebildet ist,

Fig. 10

eine Schrägansicht eines vierten Ausführungsbeispiels eines erfindungsgemäßen Anschlussadapters mit Blick von oben mit einer Klemmnase an der Spitze der Klemmzunge,

Fig. 11

eine andere Schrägansicht des Anschlussadapters gemäß viertem Ausführungsbeispiel mit Blick von unten,

Fig. 12

eine Draufsicht auf den erfindungsgemäßen Anschlussadapter gemäß viertem Ausführungsbeispiel von oben einschließlich einer beispielhaften Bemaßung,

Fig. 13

eine Draufsicht auf den erfindungsgemäßen Anschlussadapter gemäß viertem Ausführungsbeispiel von unten einschließlich einer beispielhaften Bemaßung,

Fig. 14

eine Seitenansicht des erfindungsgemäßen Anschlussadapters gemäß viertem Ausführungsbeispiel einschließlich einer beispielhaften Bemaßung,

Fig. 15

eine andere Seitenansicht des erfindungsgemäßen Anschlussadapters gemäß viertem Ausführungsbeispiel einschließlich einer beispielhaften Bemaßung,

Fig. 16

ein Schnitt durch den erfindungsgemäßen Anschlussadapter gemäß viertem Ausführungsbeispiel entlang Linie A - A,

Fig. 17

eine Ansicht eines erfindungsgemäßen Anschlussadapters mit montiertem Anschlusskabel zu einem elektrischen Gerät,

Fig. 18

eine andere Ansicht des Anschlussadapters aus Fig. 17 samt einem Anschlussmittel,

Fig. 19

eine Sprengzeichnung der Komponenten gemäß Fig. 19 samt Installationswerkzeug und

Fig. 20

eine Installationssituation des erfindungsgemäßen Anschlussadapters auf einem Anschlussmittel einer elektrischen Anlage.

There are now various possibilities for designing and developing the teaching of the present invention in an advantageous manner. For this purpose, on the one hand to the subordinate claims subordinate claims and on the other hand to refer to the following explanation of preferred embodiments of the invention with reference to the drawings. In conjunction with the explanation of the preferred embodiments of the invention with reference to the drawings, generally preferred embodiments and developments of the teaching are explained. In the drawing show:

Fig. 1

a typical installation situation with an electrical system,

Fig. 2

a known connection option of an electrical device with a special screw according to the prior art in the installation situation Fig. 1 .

Fig. 3

an oblique view of a first embodiment of a connection adapter according to the invention with a view from above,

Fig. 4

another oblique view of the connection adapter according to the invention according to the first embodiment with a view from below,

Fig. 5

4 is a top plan view of a connection adapter according to the invention according to a second exemplary embodiment including an exemplary dimension,

Fig. 6

a top view from below of the connection adapter according to the second embodiment,

Fig. 7

a side view of the connection adapter according to the second embodiment including an exemplary dimension,

Fig. 8

another side view of the connection adapter according to the invention according to the second embodiment including an exemplary dimension,

Fig. 9

an oblique view of a third embodiment of a connection adapter according to the invention, wherein in addition to the second embodiment in addition to the clamping tongue profiling is formed,

Fig. 10

an oblique view of a fourth embodiment of a connection adapter according to the invention with a view from above with a clamping lug at the tip of the clamping tongue,

Fig. 11

another oblique view of the connection adapter according to the fourth embodiment with a view from below,

Fig. 12

a top view of the terminal adapter according to the invention according to the fourth embodiment from above including an exemplary dimension,

Fig. 13

a plan view of the connection adapter according to the invention according to the fourth embodiment from below including an exemplary dimension,

Fig. 14

a side view of the connection adapter according to the invention according to the fourth embodiment including an exemplary dimension,

Fig. 15

another side view of the connection adapter according to the fourth embodiment of the invention including an exemplary dimension,

Fig. 16

a section through the connection adapter according to the invention according to the fourth embodiment along line A - A,

Fig. 17

a view of a connection adapter according to the invention with mounted connection cable to an electrical device,

Fig. 18

another view of the connection adapter Fig. 17 including a connection means,

Fig. 19

an exploded view of the components according to Fig. 19 including installation tool and

Fig. 20

an installation situation of the connection adapter according to the invention on a connection means of an electrical system.

To the Fig. 1 and 2 , which represent installation situations according to the prior art, has already been discussed in the introduction to the description. Therefore, this passage is no longer required.

The 3 and 4 show various oblique views of a first embodiment of a connection adapter according to the invention. Fig. 3 shows a view of the connection adapter 1 on the top, in Fig. 4 is a view from the bottom of the connection adapter 1 is shown. The connection adapter 1 comprises an integrally formed main body 2. The main body 2 may have been milled, for example, by a CNC machine from a block. In the base body 2, a recess 3 is formed, which is annular in this embodiment and designed as a passage. The recess 3 has a hexagonal cross-section, wherein the corners of the hexagon is widened by circular arcs. Thus, the recess 3 is adapted to a connection means in the form of a hexagon nut or a hexagonal screw head. The circular arc-shaped widening at the corners of the recess facilitates the production of the connection adapter by means of a CNC milling machine.

In the recess, a clamping tongue 4 is formed, which extends along an axis 5 of the recess. The clamping tongue 4 is formed by a cutout 6 on the bottom 7. Thus, the clamping tongue 4 is connected to the top 8 with the "rest" of the base body 2, while the clamping tongue 4 in the region of Bottom 7 spaced from the "rest" of the body 2 is formed. The axis of the recess is an axis of symmetry of the recess, along which the shape of the recess - apart from the region of the clamping tongue - is designed point-symmetrical.

In the base body 2, a first bore 9 is further formed, which serves as a device connection for connecting an electrical device. The axis of the first bore 9 is substantially parallel to the axis 5 of the recess 3. In at least parts of the first bore 9, an internal thread is formed, so that a screw for attaching a connection cable to the electrical device can be screwed. In the clamping tongue 4, a second bore 10 is further formed, which extends into the cutout 6. Also in the second bore 10, an internal thread is formed at least on parts, so that a screw for stabilizing the clamping tongue 4 and / or for increasing the clamping force can be screwed into the second bore 10.

In the FIGS. 5 and 6 are plan views of a second embodiment of a connection adapter according to the invention shown, wherein Fig. 5 a plan view of the connection adapter on the top 8 and Fig. 6 a top view on the underside 7 represents. The second embodiment corresponds largely to the first embodiment, wherein only the circular arc-shaped widenings are missing at the corners of the recess and thus the cross-section of the recess is a "real" hexagon. Such a connection adapter can be produced by injection molding, for example.

In the plan views it can be seen that the outer sides of the base body 2 is designed plan on two opposite sides and that two other outer sides are formed as circular arcs. The opposite parallel outer sides allow in principle a holding of the connection adapter by means of an open-end wrench, while, for example, a screw in the first bore 9 or in the bore 10 is tightened or loosened. It can also be seen that the recess 3 or its axis 5 is arranged slightly eccentrically in the base body 2, so that an axis of the main body 2 does not coincide with the axis of the recess 3. This eccentric arrangement increases the space that can be provided for the first and for the second hole.

In Fig. 5 In addition, exemplary dimensions are shown, which allow a size classification of the connection adapter. The width of the recess 3 is adapted to an M12 nut, so that the parallel sides of the hexagon have a distance of 19 mm. The distance between the two parallel side walls is 30 mm, so that the entire connection adapter can be held with a 30 mm socket wrench or a 30 mm socket.

In connection with the FIGS. 5 and 6 I would like to point out another detail. It can be seen that the second bore 10 does not extend completely along the clamping tongue 4. Rather, the second bore 10 has a tapering point 11, so that a screw screwed into the second bore 10 moves the clamping tongue 4 in the direction of the recess. In this way, by screwing a screw in the second bore 10, the clamping force of the clamping tongue can be increased to the connecting means. The configuration of the rejuvenation point 11 is associated with Fig. 16 even more clearly recognizable and will be taken up again in connection with this figure.

In the FIGS. 7 and 8 Side views of the second embodiment of the connection adapter according to the invention can be seen. It puts Fig. 7 a view of the connection adapter in the direction of Y from Fig. 5 while Fig. 8 a view in the direction of X also off Fig. 5 reproduces. In Fig. 7 is additionally represented by lines of cracks, as the recess 3, the clamping tongue 4, the tapering point 11 and the holes 9, 10 extend. From the example dimensions it can be seen that the largest dimension of the connection adapter is 33 mm, the thickness is 10 mm. The smallest extent in the region of the opposite circular arcs in this embodiment is 28.3 mm. The cutout 6 is made at a depth of 6 mm, so that the bridge between the clamping tongue 4 and the "rest" of the base body 2 is thus 4 mm thick.

Fig. 9 represents a perspective view of a third embodiment of a connection adapter according to the invention. The connection adapter of the third embodiment substantially corresponds to the connection adapter of the second embodiment, wherein in the third embodiment in addition to the clamping tongue 4 on the recess 3 side facing the clamping tongue 4 a Profiling 12 is formed. The profiling 12 is formed by intersecting parallel lines, wherein seven parallel lines of a first direction intersect with seven parallel lines of a second direction. When producing the profiling 12 by means of water jet cutting, sharp edges are produced which are able to pierce an oxide layer on the connection means when the connection adapter is mounted on a connection means.

The 10 to 16 show different views of a connection adapter according to the invention according to a fourth embodiment. The 10 and 11 are each oblique views overlooking the top 8 and the bottom 7 of the connection adapter. Fig. 12 provides a plan view of the top 8 and Fig. 13 a plan view of the bottom 7. Fig. 14 is a side view in the direction of the arrow Y off Fig. 12 and Fig. 15 a side view in the X direction Fig. 12 , Fig. 16 is a section along the line A - A from Fig. 12 ,

The connection adapter according to the fourth exemplary embodiment is largely identical to the connection adapter according to the first exemplary embodiment. In addition, a clamping lug 13 is formed at the tip of the clamping tongue 4, which extends in the form of a survey of the clamping tongue 4 in the direction of the recess 3. This clamping lug 13 results in a mounting of the connection adapter on a connection means that the clamping tongue 4 is bent away from the recess 3 and thereby gets under bias. In this way, the connection adapter clamps already without screwing a screw in the second bore 10 on the connection means, so that a safer installation is possible.

As already stated, the first and the fourth exemplary embodiment are similar, so that further explanations are largely unnecessary with respect to the fourth exemplary embodiment. However, it is again more accurate on the sectional view of Fig. 16 received, since the design of the clamping tongue is clearly visible here. At the top of the clamping tongue 4, the clamping nose 13 can be seen on the side facing the recess 3. On the side facing away from the recess 3, the rejuvenation point 11 can be seen. The tapering point 11 has in the form of a ramp, the clamping nose 13 is trapezoidal, wherein the tip of the clamping tongue 4 facing side of the clamping nose 13 a significantly flatter slope than the tip of the clamping tongue 4 opposite side of the locking lug 13th

In Fig. 17 is a perspective view of a connection adapter 1 with screwed connection cable 14 to an electrical device (not shown) to recognize. The connecting cable 14 has a cable lug 15, which is screwed with a screwed into the first hole hexalobular screw 16 (better known under the brand name Torx). In the second bore of the connection adapter 1, a grub screw 17 is screwed, which can move the clamping tongue 4 in the direction of the recess 3. In general, the connection adapter 1, which corresponds to Fig. 17 is shown, the first embodiment.

Fig. 18 represents a (non-assembled) system of connection adapter 1 and connection means 18, wherein the connection means 18 is formed here by an M12 nut. To attach the cable lug 15 in the first bore, a hexagon socket screw 19 is used here, the grub screw is also replaced by a hexagon socket screw 20.

In Fig. 19 a similar installation situation is shown in the form of an explosive drawing. In addition, here an installation tool 21 is shown with which the hexagon socket screws 19 and 20 can be tightened.

Fig. 20 shows an installation situation accordingly Fig. 1 in which the connection adapter 1 according to the invention is installed. The connection means 18 is again formed by an M12 nut, by means of which a cable thrust of a high-voltage cable is fastened on an M12 screw or an M12 threaded rod. Incidentally, the connection adapter 1, together with all elements shown and connected thereto corresponds to the in Fig. 17 represented elements.

1. 1. Die Ausnehmung in dem Grundkörper kann eine Innen-Sechskantform aufweisen.
2. 2. Der Anschlussadapter kann elektrische, hochfrequente Signale übertragen.
3. 3. Der Anschlussadapter kann über eine schraubbare Verfestigung verfügen sowie einen Anschluss für Spannungsabgriff.
4. 4. Die Kontaktflächen an der Ausnehmung können angeraut sein und "beißen" sich dadurch in die vorhandene Sechskantmutter (Anschlussmittel), um den Übergang zu reduzieren.
5. 5. Der Anschlussadapter kann mit Standardwerkzeug einfach installiert werden.
6. 6. Ein Federanschluss und eine Verjüngung (Klemmnase) kann vor dem "Anziehen" ein herausfallen verhindern.

In summary, the connection adapter according to the invention can have one or more of the properties described below:

1. 1. The recess in the base body may have an internal hexagonal shape.
2. 2. The connection adapter can transmit electrical, high-frequency signals.
3. 3. The connection adapter may have a screwable solidification and a connection for voltage tap.
4. 4. The contact surfaces on the recess may be roughened and thereby "bite" into the existing hex nut (connecting means) to reduce the transition.
5. 5. The connection adapter can be easily installed with standard tool.
6. 6. A spring connection and a taper (clamp nose) can prevent it from falling out before "tightening".

The material of the connection adapter is preferably equal to that of the connection point, usually a 8.8 galvanized steel. Described below is the connection example M12 screw DIN 24017 or M12 flange nut DIN 6923.

The recess of the connection adapter has an inside diameter that corresponds to the wrench size 19mm of an M12 nut. The tolerances in the production of the mother and weather-related deposits in the cable connection space on the nuts are compensated by the fact that by tightening a screw at the second hole in which a cone is incorporated, a movable edge is pressed inside the connection adapter inside. On a further connection (first bore), a cable lug can be placed and screwed to connect a BPL line or for making a voltage tap for supply and operation of electrical equipment, e.g. for measuring sensors. A cable lug can alternatively be clamped from the front between the flank to be moved in the second bore and the mother or creates a further movable edge of the same kind to the second bore and there has a Klemmmöglichkeit there for the cable lug.

Since system-related corroded surfaces at the connection point must be expected and the environment (street distributor) a treatment of the connection surface can not be expected, it is helpful to provide on the contact surfaces a profiling in the form of structures or bumps, as teeth, stripes, teeth , Notches or the like can be executed. When manufacturing the part, for example by means of water jet cutting, a roughening is given by the beam due to the manufacturing technology. By breaking the corrosion layer by means of a corresponding profiling can BPL signal are transmitted better and there are less high-frequency (1-30Mhz) reflections, which negatively affect the BPL signal.

When installing the connection adapter, a socket with insulated socket wrench can be used. Thus, the connection adapter can also be mounted in the live state of the electrical system. In addition, the use of such a standard tool simplifies installation in a tight environment and the risk of electric shock is reduced. When mounting to a live equipment normally insulated gloves should be used to make handling difficult. For positioning the connection adapter, a connection cable already provided with the connection adapter can also be used and routed. Depending on the angle of the cable, the positioning on the hexagon is easy to see and can then be pressed by the free hand or by guiding and pressing an insulated screwdriver.

When mounting is in the environment of bare multi-phase terminals and busbars falling or before fixing a plugging the connection adapter with a certain anti-slip measure low, for example, to ensure alignment. For this purpose, a mandrel / hook / elevation is attached to the position / side of the clamping tongue, which is smaller than the actual nut head. When mounting the terminal adapter, the clamping tongue may be exposed to the outside, i. away from the recess, pivot and hold the connection adapter on the connection means like a spring.

In addition, the flanks can be made to taper, i. the farther the hexagonal connector is pressed onto the nut the tighter it gets.

With regard to further advantageous embodiments of the connection adapter according to the invention and its use, reference is made to avoid repetition to the general part of the specification and to the appended claims.

Finally, it should be expressly noted that the above-described embodiments of the connection adapter according to the invention only serve to discuss the claimed teaching, but not limit these to the embodiments.

LIST OF REFERENCE NUMBERS

1

connection adapter

2

body

3

recess

4

clamping tongue

5

axis

6

countersink

7

bottom

8th

top

9

First drilling

10

Second hole

11

constriction point

12

profiling

13

clamping nose

14

Connection cable (to el. Device)

15

lug

16

Screw (for connection cable)

17

grub screw

18

connection means

19

Allen screw

20

Allen screw

A

lug

B

High voltage cables

C

First nut

D

Second nut

e

Connection cable (coupler)

F

Cable lug (for coupler)

G

Special nut

Claims (16)

Connection adapter for connecting an electrical device, in particular a coupler for power line communication, with a connection means of an electrical system, wherein the connection adapter (1) has a base body (2), wherein in the base body (2) has a recess (3) for at least partially enclosing the connection means (18) and a device connection for connecting the electrical device are formed, wherein the device connection in a direction perpendicular to an axis (5) of the recess (3) from the recess (3) is spaced, wherein in the recess (3) a clamping tongue (4) is formed, which is formed with mounted connection adapter (1) for exerting a clamping force on the connection means (18). Connection adapter according to claim 1, characterized in that the device connection by a first bore (9) in the base body (2) is formed, which is preferably parallel to the axis (5) of the recess (3), wherein preferably at least parts of the first bore (9) include an internal thread. Connection adapter according to claim 1 or 2, characterized in that on a side facing away from the recess of the clamping tongue (4), a second bore (10) is formed, wherein at least in parts of the second bore (10) has an internal thread and wherein the recess (3) side facing away from the clamping tongue (4) is preferably designed such that in the second bore (10) screwed screw (17, 20) moves the clamping tongue (4) in the direction of the recess (3). Connection adapter according to one of claims 1 to 3, characterized in that the recess (3) is substantially annular and / or formed as a passage. Connection adapter according to one of claims 1 to 4, characterized in that the connection adapter (1) together with the clamping tongue (4) is integrally formed. Connection adapter according to one of claims 1 to 5, characterized in that extending the clamping tongue (4) in a direction parallel to an axis (5) of the recess (3) and / or that the clamping tongue (4) is formed substantially rectangular or trapezoidal is. Connection adapter according to one of claims 1 to 6, characterized in that the base body (2) has a top (8) and a bottom (7), wherein the top and bottom (8, 7) preferably parallel to each other and perpendicular to an axis (5) of the recess (3) are formed. Connection adapter according to claims 6 and 7, characterized in that the clamping tongue (4) at the top (8) is connected to the base body (2) and at the bottom (7) spaced from the base body (2) is formed. Connection adapter according to one of claims 1 to 8, characterized in that on the recess (3) facing side of the clamping tongue (4) has a profiling (12) is formed, wherein the profiling (12) preferably by a plurality of teeth, lines, strips, Serrations or indentations is formed, and / or
in that a clamping nose (13) is formed on a tip of the clamping tongue (4), wherein the clamping nose (13) is preferably designed as a mandrel, hook or elevation. Connection adapter according to one of claims 1 to 9, characterized in that the base body (2) is flat, ie that the base body (2) in a first direction parallel to an axis (5) of the recess (3) has a significantly smaller extent as in a second direction perpendicular to the first direction, wherein the extent in the first direction is preferably at least three times smaller than the extent in the second direction. Connection adapter according to one of claims 1 to 10, characterized in that the cross section of the recess (3) tapers in a direction parallel to an axis (5) of the recess (3). System for connecting an electrical device, in particular a coupler for power line communication, comprising a connection means (18) and a connection adapter (1) according to one of claims 1 to 11, wherein the connection means (18) is part of an electrical system and preferably an electrical connection to having a power supply network. System according to claim 12, characterized in that the cross section of the recess (3) of the connection adapter (1) is adapted to the cross section of the connection means (18) such that a positive connection between the connection adapter (1) and the connection means (18) is formed is. System according to claim 12 or 13, characterized in that the recess of the connection adapter (1) is formed coaxially with the connection means (18), wherein the connection means (18) preferably a screw head or a nut, most preferably a hexagonal screw head or a hexagon nut , includes. System according to one of claims 12 to 14, characterized in that the clamping tongue (4) is adapted to the connection means (18) such that the clamping tongue (4) upon plugging the connection adapter (1) on the connection means (18) of the Connection means (18) is bent away and thus goes into bias. Electrical installation with a system according to one of Claims 16 to 19.

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