DE102008058849B4 - Connection device with phase selection - Google Patents

Abstract

The connection device (1) has a rotating phase-selection element (2) and a receptacle for the phase-selection element, where a tapping unit is arranged in an eccentric arrangement on the phase selection element. The phase-selection element and receptacle are formed complementary to each other, where a phase selection is possible in three-rotational positions of the phase selection element.

Description

The The invention relates to a connection device for stripping-free Tapping contact of a multi-phase flat cable, which makes it possible to tap only one of the veins belonging to the different phases, ie to make a "phase selection".

Connection devices with which a continuous flat cable with several in-plane power cores (eg for 380 V three-phase current) can be tapped without separating the wires and without removing wire and cable insulation have been known for over 30 years. An early publication in this respect from the applicant's home is, for example, the German patent application DE-AS 2 206 187 , Tapped screws are used as tapping contacts. The connection is made by the connecting device with its housing - initially without the contact screws - placed on the cable and then the cable is also enclosed on the back of a housing plate. Finally, the tap is done by the guided in the housing with internal threads contact screws are screwed into the flat cable. They penetrate with their tip, first the outer insulation of the flat cable, then the respective core insulation, and finally penetrate with the tip in the head of each vein. This contacts the relevant wire.

One Three-phase consumer must be connected to all three phase conductors; single-phase However, consumers are only connected to a phase conductor (and the neutral conductor as the return conductor). To load the three-phase system symmetrically, the different ones are single-phase consumers of a consumption unit (eg a building) with approximately uniform distribution to connect to the three phase conductors.

Conceivable would it be, therefor corresponding to three different prefabricated types of connection devices each type being connected to a particular one Phase conductor allowed. To avoid such effort, but still at the installation site flexible a particular phase conductor choose to be able to if a connection device is desirable, in which the tapable wire is not fixed, but the it allows the installer the wished Phase conductor only during installation by a corresponding setting to choose the device.

There are for this in the prior art already various proposals.

In the aforementioned DE-AS 2 206 187 already mentioned the possibility, if necessary, to tap only the wire of one of the three phase conductors by screwing in only the corresponding contact screw (hereinafter the wire forming a phase conductor is also called "phase wire" for short).

In a known type of connection device, a contact slide is provided as a phase selector. This can be moved linearly to select the desired phase across the cable (at a 90 ° angle or slightly inclined to the cable length direction) (see eg WO 00/41277 . DE 196 15 597 . DE 197 46 493 . DE 41 27 899 ),

A second known type, on the other hand, has a bridge-type swivel arm for phase selection (see, for example, FIG. DE 199 43 734 and DE 38 18 078 ),

Switches are also known from the field of socket technology, with the aid of which a socket of a socket can be connected either to a permanently current-carrying current conductor or to a conductor which can be switched off or switched on by means of a socket-external switch. The switches are designed for example as a sliding or rotary switch (see DE 299 17 323 U1 ),

These known connection devices are partly in terms of operation not yet considered optimal, partly they are structurally relative consuming. The aim of the present invention is to develop one in this regard Connection device with phase selection to provide.

The Connecting device according to the invention for stripping-free tapping of a multiphase flat cable has a rotatable phase selector and a receptacle for the phase selector on. On the phase selector is in eccentric arrangement a Tapping arranged. The phase selector and the recording are complementary to each other in a 120 ° rotational symmetry (hereinafter abbreviated to "120 ° symmetry"). Through this 120 ° symmetry contacting one of the plurality of phase conductors with a tap contact, So a phase selection, in three predetermined rotational positions of the phase selector allows.

The connecting device according to the invention is designed to permit the tapping of a continuous flat cable with a plurality of power cores (eg for 380 V three-phase current) lying in one plane without separation of the wires and without removal of wire and cable insulation. The term "tapping device" stands here as a generic term for various possibilities of embodiment. As will be explained in more detail below, the tapping device z. B. as a guide for a tapping contact which is movable in the tapping direction, into which the tapping contact has already been inserted and only has to be moved in order to tap the flat cable. It is also conceivable that the tapping contact is not yet inserted into the guide, so that the guide alone forms the tapping device. Furthermore, the tapping device can also be designed as a tapping contact fixed in the tapping direction or as a loading element for a tapping contact. For example, sharpened screws can serve as tapping contacts that are movable in the tapping direction. The preparation of a connection then takes place, for example, by the fact that the contact screw is screwed into the flat cable. It penetrates with its tip, first the outer insulation of the flat cable, then the core insulation of the selected phase core, and finally penetrates with the tip in the head of the selected phase wire and contacts them hereby.

The Connecting device according to the invention thus allows on-site phase selection (i.e., at the point of manufacture connection) by means of the rotatable phase selector. The tapping device is arranged eccentrically to the axis of rotation of the phase selector. at the "rotation axis" can do it act around the imaginary axis to which the phase selector to Reaching the various phase selection positions is to turn or a structurally available axis with which the phase selector is stored on the recording. Through to the axis of rotation of the phase selector eccentric arrangement of the tap leads the rotation of the phase selector to a movement of the tapping device along a circular path around the axis of rotation, and thus also to the necessary displacement transversely to the cable longitudinal direction, to the desired To be able to contact the phase conductor. Here is the eccentricity, So the distance d the tapping device of the rotation axis, so chosen that said circular path at least to the farthest from the axis of rotation remote selectable Phase vein (or veins) reaches. With an odd number of phases (i.a., three phases) is the axis of rotation, for example, over the arranged in the middle phase core. In this case, the eccentricity has at least the size of the distance between the middle phase conductor and the farthest one Phase conductor.

The complementary Formation of phase selector and recording in the 120 ° symmetry is such that the recording the phase selector only in certain Can record rotational positions, and only in three rotational positions, which are 120 degrees apart from each other are spaced. Only in one of these rotational positions is it possible to do that Phase selector z. B. in the recording and thus to make a phase selection. The mentioned 120 ° symmetry relates functionally on the ability of the phase selector to be placed in a position that it allowed to penetrate into the flat cable with the tap contact. The outer shape from phase selector and / or recording can - if they are not for this Function is determinative - of the 120 ° symmetry differ. For example, could when recording in the form of an equilateral triangle in the complementary to it Phase selector be cut off one of the corners of the triangle. As far as pure (non-functional effective) shaping is concerned, would be present broken the 120 ° symmetry given the missing corner. Here but even with the cut off corner the said function would be maintained that the phase selector only in one of the three spaced apart by 120 ° angular positions can be brought into contacting position, the 120 ° symmetry preserved in the functional sense underlying here.

Strictly speaking represents the fact that only a single eccentrically arranged Tap device is present, a refraction of the 120 ° symmetry (with strict 120 ° symmetry would have three Such facilities may be provided). But the fact that on the 120 ° -symmetric phase selector only exactly such a device is available, just leads just to get that out of three possible ones Only one phase selected can be.

On other parts of the phase selector and pickup that are not directly their interaction relates to the demand for the 120 ° -symmetric Training not; so they can asymmetric with respect Be 120 °. For example, in some embodiments, the phase selector is on a handle (for example, a kind of twist grip) formed, the no 120 ° symmetry having.

In similar functional Way the term "complementary" is to be understood. He should express that Phase selector and recording fit together so that said Function is achieved, so contact (only) in the three positions is possible. "Complementary" means but not about that shaping of phase selector and recording must be the same, as the above example with the cut corner shows.

In the flat cable are (at least) the selectable for contacting phase conductors equally spaced. It is namely a property of the 120 ° symmetry that, in an arrangement of the phase selector, wherein the axis of rotation is disposed above the middle of the three selectable phase conductors and in one of the three selectable angular positions, the eccentric tapping means over the middle phase core, the device in the two other possible angular positions at the same distance left or right of the center line to lie (the three contact positions lie on the corners of an equilateral triangle). The 120 ° symmetry of the fully (ie by 360 °) rotatable phase selector thus forms the geometric equivalent of the equal spacing of the phase conductors in the cable. A flat cable of the type mentioned are, for example, from the document mentioned above DE-AS 2 206 187 known.

The Connection device has through the 120 ° symmetry of the phase selector a relatively simple structure and at the same time allows an intuitive-simple and safe on-site phase selection. Compared to the previously known Phase selectors that work with linear displacement will with her no additional Space needed in cable transverse direction. The aforementioned prior art connectors with swivel bridges or Fork contacts are structurally relatively expensive; as well with them all phase artery - too the ultimately unelected - with each tapped into a tap contact while in the present connection device, only the core of the selected phase conductor needs to be tapped; d. H. there is only a puncture the isolation of one, viz the actual selected Phase leg.

at an optional embodiment of the invention, the limitation of Anzapfmöglichkeit on the only three said angular positions achieved by that the receptacle is formed as a recess, and the phase selector only in the three by the 120 ° symmetry allowed rotational positions can be used in the depression. For example can the recess and the phase selector essentially the form of an isosceles triangle, relative to the flat cable is oriented so that the projection of one of its bisectors perpendicular to the cable coincides with the middle of the three phase conductors. That in this case only one of the phase conductors can be contacted, based the fact that the phase selector has only one tapping device.

at an embodiment of the connecting device, it may be in the eccentrically arranged on the phase selector tap device, for example for a tour for one Tapping and the tap itself act, the Tapping contact - as below even closer explained will - in the direction designed to be movable to the cable core is (for example in the manner of a screw-in contact screw). The Connecting device is thus z. B. already used in the leadership Tapping contact supplied, allowing the installer during their installation the tapping contact no longer in a separate operation in the leadership must use. Thus the tapping contact - for example, during transport of the connection device or while their installation - not out of the lead fall out can do this a loss protection be provided. This can be designed in this way be that the inner geometry of the guide is approximately complementary to the outer geometry of the Tapping contact is and also the inner surface of the guide at least partially off an elastic material, so that by the resulting Frictional force the movement of the tap contact in the guide to is inhibited to some degree, turning in the tap contact Tapping direction possible, however is. Other variants of such a loss-protection are also conceivable, such as a closable Cover the guide or another solvable Bracket. These variants could z. B. then come into use when leadership and tapping contact not complementary are formed, but the inner geometry of the guide greater than the outer geometry of the Tapping contact is and the lead the tapping contact does not lead in a specified direction, but Accordingly, only as "implementation" for the tap is trained.

Of the Tapping contact does not necessarily need to be eccentric arranged tapping device, but it can also only his leadership be provided. In such an embodiment of the tapping device would the phase choice by rotation of the phase selector even without tapping contact performed, and only in the next Step would the tap contact is used (eg the contact screw inserted into the guide). The connection device is so here, for example, without tap delivered so that the latter only at a later date (eg the installation) in the lead is used. This can be useful, for example, if the connection device for various types of tapping contacts is prepared and initially open should stay, what kind actually should be used.

alternative the tapping device may also be fixed in the tapping direction To be designed tap contact, in which case no guide for this must be provided. In yet another alternative in the connection device for every tapable phase a tap contact in "waiting position" available. After phase selection (i.e., rotation of the phase selector in FIG the relevant angular position) is by applying a eccentrically arranged on the phase selector member applying element only to the chosen one Phase conductor belonging Tap contact pressed into the cable, so that also only the selected phase core will be contacted. The apply element is z. B. a guided in the phase selector ram.

In another embodiment, the possibility of penetration of the tap contact is characterized limited to the three said rotational positions that the recording has three openings for the tapping contact in 120 ° symmetry. These can be configured for example as threaded holes and allow the passage of the tap contact to the flat cable and thus the contacting of the selected phase core only in one of the three rotational positions. This measure can be provided in embodiments with recording in the form of a 120 ° -symmetric recess (as stated above); but it is possible that the 120 ° -symmetrical arrangement of the passages mentioned here alone ensures that the tap can only take place in one of the three said rotational positions.

at an optional embodiment is the phase selector in the course the phase selection, namely after the rotation of the phase selector and if necessary, press it down lockable in the recording in one of the three said rotational positions. The lock ensures that the phase selector does not back from the chosen one Position releases. With her so a lock is made in terms of phase selection. Furthermore In some embodiments, it may represent a possibility, such as the phase selector can absorb the reaction force that the flat cable the tap contact when impressed opposes.

at one embodiment, the locking is done by locking the Phase selector in the recording. For this purpose, for example, to phase selector and receiving a detent undercut arrangement Be provided when inserting the phase selector in the phase selection well of the recording initially elastically deformed and then it locks in place.

at an optional further embodiment, the lock is non-destructive not solvable, so that the once made phase selection non-destructive non-reversible is. That means, for example, that the phase selector after making the phase selection no longer can be removed from the receptacle without the connecting device destroyed (i.e., significantly impaired in terms of their functionality or unusable). In embodiments with locking is For example, a detent undercut arrangement self-locking executed, so that the catch when violently pulling out the phase selector breaks and thus in a possible attempt to return it to the recording to use, the locking function is no longer available. Through these measures is (largely) prevented from being on the spot once Tapping a particular phase wire - with the associated Violation of the isolation of this vein - tapped another phase vein can be. This helps avoid being near a tap of a phase wire the isolation of another phase vein may be injured (whole exclude can this measure such a "phase selection change" but not because an installer after a first tapping attempt a virgin connection device for the could use repeated installation, and another Phase than the first try could; but at least that's the possibility excluded with the connection device used first). This measure serves safety, since such insulation injury is a reduction would represent the effective creepage distance.

In spite of irreversibility the phase selection is not the connection device in some embodiments unusable once the phase has been selected (eg the phase selector pressed into the recording and was locked in it. Rather, the connection device even after making the selected phase non-destructive removed from the flat cable be and z. B. at another, offset in the longitudinal direction point of the flat cable - under Retention of the already made phase selection - to be reused. For example has the phase selector rotatable in the three angular positions guide and the inclusion in said angular positions three passages with female threads for the Tapping element in the form of a contact screw. The real one Tapping contact takes place after the (first) phase selection, in which the phase selector irreversibly in one of the three rotational positions was locked in the receptacle, by screwing in the contact screw. The connection device can after unscrewing the contact screw taken off the flat cable and in another place in Cable longitudinally be attached to this again. At this new location then To contact again the same phase conductor, it requires only the renewed Screwing in the contact screw (no further phase selection).

According to one optional design is complementary to the recording part of the phase selector mainly formed as a rotatable plate which is oriented perpendicular to the axis of rotation is.

at the axis of rotation may be - like already mentioned above became an imaginary axis. The installer would be in this Case the phase selector "free flying "in rotate the angular position corresponding to the desired phase, and insert it in this position in the receptacle.

In order to facilitate the phase selection, however, there are embodiments in which the axis of rotation is structurally defined. It is in Ausgestaltun conditions in which the phase selector can be inserted into the receptacle to an axially displaceable pivot bearing. For example, in one of these embodiments for defining the axis of rotation of the phase selector member, an axially displaceable stub axle stub bearing arrangement is provided between the phase selector and the receptacle. For example, the stub axle at the bottom of the receptacle may be arranged directed in the center of the phase selector; the bearing for this stub axle z. B. in the form of a stub shaft complementary bore with sufficient length for the axial displacement is then in the phase selector. In other embodiments, conversely, the phase selector is equipped with the stub axle; in the bottom of the recording is then z. B. a bore forming the bearing.

alternative or in addition to the stub axle-stub bearing arrangement has in other embodiments the connection device for defining the axis of rotation of the phase selector a circular depression on. This leads the phase selector rotatably over the Admission. The inner radius of the circular recess preferably corresponds the largest radial Extension of the cooperating with the depression area of the Phase selector (ie at a phase selector in the form of an equilateral Triangle, for example, the distance of the corners of the triangle from Pivot point). Such causes an axis definition, analogous to the stub axle stub bearing arrangement. In addition, the circular depression facilitates the management of the phase selector element over the Recording during the rotation.

at an optional embodiment is a handle on the phase selector intended. This makes it easier for the installer to turn the phase selector and if necessary to be able to use it in the recording. Advantageously, the Handle in each of the three possible Turning on a marker on which the relevant phase features. From this is the respectively selectable or already selected phase readable, which helps to avoid confusion in the phase selection or to check the phase selection made. For example, the Handle have a shape reminiscent of a pointer (or it may be attached to her a pointer icon). The pointer points depending on the rotational position of the phase selector on the relevant phase marker.

at another embodiment has the - of insulating material manufactured - handle alternatively or in addition the function of a contact protection. And that encloses they at least partially the tap. Especially with versions with a tap contact in the form of a contact screw it encloses the Screw head, z. B. in the manner of a tube. When screwing the lowers Screw head, so that at the moment of contacting a protruding insulating apron is surrounded. This provides some protection against accidental contact with the then possibly live Screw head. Incidentally, has the skirt also the function to guide the contact screw when screwing.

at some embodiments is - how already mentioned was - the Tapping contact a screwable in tapping contact screw made of conductive material (eg metal). The thread of the screw device Turning her in contact with the also electrically conductive Internal thread of the respective passage opening. The internal thread of the Through openings in turn, are electrically conductive z. B. with a leading through the connection device Connecting bar connected. The connecting bridge ensures the passage of electricity z. B. to a outgoing terminal on the housing of the connecting device. The internal thread of the passage opening In addition, it absorbs the reaction force that causes the flat cable to tap opposes it when turning it (so that in this variant this Function not of the o. G. Snap is perceived). As an alternative to threads in the passage openings can also already in the lead for the tapping contact be provided an internal thread, which is electrically conductive z. B. is connected to the stub axle of the phase selector. In this Case is the stub axle stub bearing assembly designed as a rotary electrical connection, so that the current transition from the rotatable phase selector to an outgoing connection.

In a configuration with contact screw, there are various possibilities for the order of the individual operations during installation of the connection device. For example, first of all the connecting device can be placed on the flat cable to be tapped on the point of the flat cable provided for the connection. Then the installer can make the phase selection by rotation of the phase selector, pushing in and possibly locking in the recording. The order of these two steps can also be reversed. In general, only then the contact screw is screwed in and thus tapped the selected phase wire. Because if the phase selector is already in its final position immediately above the phase core, the contact screw is well managed and therefore will hit the core exactly in the middle. The tapping of the flat cable is thus decoupled from the phase selection. Alternatively, however, embodiments are possible in which first the contact screw is screwed and then the phase selector member is depressed. In this case, the tapping of the selected phase artery occurs simultaneously with the phase selection (this corresponds to the procedure in embodiments with festste Hend Tapping - see below). Finally, it is also possible, with not yet attached to the cable connecting device already make the phase selection (and in versions with contact screw this already screwing it in), and press the housing part with the out standing contact screw (or out standing fixed blade contact) on the flat cable , and thereby make the contact.

at the de-installation of the connection device can then first the Unscrew the contact screw and then the connecting device from the Flat cables are removed. As already mentioned above, the connection device in those embodiments in which the phase selection nondestructive is not reversible, at another point of the flat cable again attached and the contact screw while maintaining the phase once selected be screwed in again for tapping. Is provided, however, that the phase selection is reversible, so the phase selector can be removed from the recording and another phase chosen become. In this case, the reinstallation can be analogous to the first Installation done.

In another embodiment of the connection device, however, the tap contact is designed as a contact blade fixed relative to the phase selection element (the fixed tap element referred to herein as a "contact blade" can also be conical, ie more in the form of a "contact mandrel"). Stripping-free tap with the help of such, at least in the direction of tap fixed contact blades is for example from EP 0 726 623 A1 to which reference is hereby made for further details of the contact blades. In this embodiment, the tapping of the flat cable z. B. made in the course of the phase selection with the depression and locking of the phase selector. Alternatively, as mentioned above, the phase selection may be made with the connection device not yet pressed onto the cable, and only then the connection device pressed onto the cable. A guide ensures (similar to the guide for the contact screw), even in these two embodiments, that the fixed contact blade not only penetrates just above the wire to be contacted, but is also moved exactly in the direction of the wire to meet the conductor in the middle. For example, forms in a pivotally aufdrückbaren contact housing part according to the EP 0 726 623 A1 the housing pivot bearing such a guide.

Theoretically needs a three-phase cable only three phase conductors, so that a to be tapped Flat cable with only three power conductors and a trained for this purpose Connection device are conceivable. As a rule, but is a neutral conductor (also neutral) required, and usually also a separate protective conductor, so that the flat cable to be tapped has four or five power cores. Corresponding has the connection device in such embodiments in addition to the tapping device at the phase selector further tapping contacts for contacting the Neutral and protective conductor.

In some embodiments, the flat cable eventually additionally comprises one or more data lines, as for example in the EP 0 665 608 B1 is described. For stripping-free tap also the data line, this embodiment is also equipped with special tap contacts for the data line.

The described connecting device is particularly suitable for large installations, z. B. at large Office buildings, at whom it is especially on low workload for initial installation and flexibility in terms of possible subsequent installations arrives.

Various embodiments The invention will now be described by way of example with reference to the accompanying drawings described. Show:

1 an overall perspective view of a first embodiment of the connection device with locking at the corners of the phase selector, wherein the phase selector member is in a contacting the phase conductor permitting rotational position;

2 a plan view of the connection device of 1 , wherein the phase selector in the same position as in 1 is;

3 a plan view accordingly 2 However, the phase-selecting element is in a rotational position between two rotational positions allowing a contacting;

4 an overall perspective view of the connecting device of 1 after impressing and locking the phase selector in the receptacle;

5 a cross section through the connecting device of 1 wherein the phase selector is in a rotational position permitting contacting, but not yet pressed into the receptacle;

6 a cross section accordingly 5 but now with pressed into the recording and locked in this phase selector;

7 a cross section accordingly 6 but now with screwed contact screw;

8th an overall perspective view of another embodiment with a circular recess for guiding the rotatable phase selector and latching on the leg portions thereof;

9 a plan view of the connection device of 8th , corresponding to a position of the phase selector 8th ;

10 a cross section through a connecting device according to 8th with a representation of the current flow from the contacted flat cable conductor to the outlet connection;

11 an enlarged cross-section of a connecting device according to 10 ,

Both embodiments of the connection device 1 according to 1 to 9 have a phase selector 2 in the form of a rotatable plate. On this is a sleeve 12 arranged in which a phase selection tap contact 3 is housed. The latter is exemplified in the embodiments shown in the figures as a movable, rotatable in the direction of tap contact screw. The tap contact 3 is eccentric to at 11 lying axis of rotation ( 2 . 3 . 5 - 7 . 9 ) arranged parallel to this and initially above the rotatable plate, in the case of the screw embodiment shown here in a guide in the phase selector 2 , Upon rotation of the phase selector 2 The tap contact moves on a circular path around the axis of rotation 11 of the phase selector 2 , The sleeve 12 is extended to the axis of rotation and runs to the opposite leg of the phase selector 2 pointed together. It thus forms a handle, or a "handle", for easy operation (turning, pushing) of the phase selector 2 serve.

The phase selector 2 and the recording 4 are shaped complementary to each other in 120 ° symmetry. This symmetry requires that the phase selector 2 for the purpose of phase selection in exactly three rotational positions in the recording 4 can be depressed. Before pressing in, the phase selector is located 2 still above the picture 4 ( 1 . 3 . 5 . 8th ); it is then still rotatable. Only in one of the three rotational positions permitted by the 120 ° symmetry can it be in the recording 4 be pressed. The 1 . 2 . 8th . 9 show such a rotational position, but with not yet depressed phase selector 2 , This is in the 1 and 8th Recognizable that the phase selector 2 not yet in the recording for the phase selector 4 has been pressed down. 3 shows, however, a rotational position in which the phase selector 2 can not be pushed in.

The shape shown in the figures of phase selector 2 and recording 4 reflects the 120 ° symmetry: the rotatable plate has the shape of an equilateral triangle with truncated ( 1 - 4 ) or rounded ( 8th . 9 ) Corners. The recording 4 has the complementary shape. However, such complementarity in the strict sense is not necessarily required to achieve the phase selection function. For example, it would be possible without affecting the function, one of the corners of the phase selector 2 to shorten.

In the first embodiment ( 1 - 4 ) are at the cut corners of the triangular plate of the phase selector 2 locking lugs 6 arranged. Upon depression of the phase selector 2 they engage in corresponding undercuts 10 ( 5 - 7 ) at the recording 4 and latch so phase selector 2 and recording 4 ,

The phase selector 2 is with an axially displaceable pivot bearing in the connection device 1 stored. And that serves a stub axle-stub bearing arrangement 17 . 18 at the reception 4 , This defines the axis of rotation 11 , In the embodiments illustrated in the drawing ( 5 - 7 ) extends the stub axle 17 from the ground in the center of the picture 4 , The axle stub bearing 18 is a hole through the center of the phase selector 2 , which is sufficiently long to the axial displacement of the phase selector 2 when pressing into the receptacle 4 to allow. The stub axle 17 extends so far over the bottom of the recording 4 In addition, he is not even in the recording 4 Pressed phase selector 2 into the hole of the axle stub bearing 18 engages and hereby the axis of rotation for the phase selector 2 defined in the not yet depressed state.

A cross section of the 5 - 7 illustrated ring with tapered cross-section ensures in conjunction with an output-side constriction of the Achstummellagerbohrung 18 for that phase selector 2 also not yet in the recording 4 pressed state is captively connected to the connection device.

At the reception 4 are labels 7 to mark the belonging to the different rotational positions phase conductor applied. The tapered sleeve 12 also serves as a pointer, depending on the selected rotational position on the relevant label 7 has. In 1 So it was the phase L2, and in 11 chosen the phase L3.

The connection device 1 has a recording room 5 for the flat cable on. The flat cable itself is not shown in the figures, but the inner contour of the receiving space 5 is formed complementary to the outer contour of the flat cable, for the contacting of the connection device is determined. In the embodiments shown in the figures is the contour of a flat cable with five equally spaced power conductors and a two-core shielded data line, all lying in one plane. On one side of the cable, the three phase wires are gathered, on the other side is the data line, and between them are the neutral conductor and the protective conductor (in this arrangement, the distance between the live phase conductors and the data line is greatest, thereby causing crossovers in the Data line are relatively low). Such a flat cable is for example from the EP 0 665 608 B1 known. The flat cable to be contacted has no symmetry against rotation by 180 ° (see DE-AS 2 206 187 and EP 0 665 608 B1 ), so that it can only be contacted in one of the two basically possible orientations. This avoids unintentional swapping of, for example, phase, protection, neutral and possibly data conductors.

The connection device 1 also each has a tap contact 8th . 9 , for the neutral conductor and the protective conductor. Both contacts - the z. B. in turn have the form of contact screws - are each housed in an insulating sleeve. These contacts 8th . 9 are not rotatable on a phase selector o. Ä., But firmly in the housing of the connection device 1 arranged, because neutral conductor and protective conductor are always contacted - regardless of the phase to be selected.

Finally, the connection device 1 three outlet connections 16 on, which are electrically connected to the selected phase, the neutral conductor or the protective conductor. The outlet connections 16 allow thus z. B. the connection of a single-phase electrical load. The in the 10 and 11 shown current path leads from the selected phase conductor 19 over the tip of the tapping contact formed by the contact screw 3 through this, then on the external thread of the contact screw and engaging in this internal thread of the threaded hole 13 , from there via the connecting bridge 20 to the phase conductor outgoing contact (one of the three 16 ),

In the following, we will now describe the different positions that the connection device undergoes in the course of a phase selection. First, let's look at the eccentric arrangement of the single tap contact 3 with respect to the axis of rotation 11 pointed out, which is particularly good in the plan views of 2 and 9 is visible.

First, the installer becomes the phase selector 2 ia turn to the position corresponding to the desired phase. In 3 For example, such a rotation is illustrated to bring the pointer to the "L2" position. In the illustration is the phase selector 2 just in an angular position between two "allowed" positions, and therefore can not be there in the recording 4 be pressed (because the cut corners of the phase selector 2 not above the corresponding corners of the picture 4 lie).

Then one of the 120 ° symmetry allowed rotational position is reached, z. B. in the 1 and 2 shown position "L2". The phase selector 2 is not yet in the recording 4 pressed in, so it is still in a plane above the recording 4 as in the 1 . 2 . 5 and 8th is shown.

Then the installer presses it into the receptacle 4 , The locking lugs 6 deform elastically, around the undercuts 10 to pass through, and finally take it up ( 4 and 6 ), This is the phase selector 2 in the recording 4 locked. The tap contact 3 is now above one of the three threaded holes 13 (due to the 120 ° symmetry of the threaded holes 13 is in the cross sections of the 5 - 7 only one opening at a time).

Finally, the installer turns the tap contact 3 forming contact screw. She engages in the threaded hole 13 arranged internal thread into it. Its tip then penetrates the cable sheath and the core insulation of the selected phase core and finally penetrates into the conductor. It takes the internal thread of the threaded holes 13 the reaction force of the contact screw in the flat cable pushing force. 7 shows the corresponding end position of the contact screw.

In the embodiments shown, the locking lugs 6 and undercuts 10 shaped so that the phase selector 2 and / or the recording 4 deform elastically when pressed in order to allow the snapping, while attempting the locking z. B. by train on the phase selector 2 to solve again, but break. This is due to different angles between the surfaces which engage with each other during latching and (attempted) disengagement. Such as B. the 5 and 6 show when snapping relatively acute angle relative to the direction of movement that the engagement surfaces slide past each other; In the (attempted) disengagement, on the other hand, surfaces with angles are used which are almost at right angles to the Be direction of movement, so that then there is self-locking. When self-locking the surfaces do not slide past each other, no matter how large the force is. With increasing force, the locking lugs break 6 and / or undercuts 10 so that the lock could no longer work in any further phase selection attempt. The connection device 1 is no longer usable. Once a phase selection has been made, it is non-destructive and non-destructive.

In the second embodiment shown in the drawing ( 8th - 11 ) of the connection device 1 is at the recording 4 a circular depression 14 provided opposite the surrounding level of the housing bottom. The cut off corners of the phase selector 2 are complementarily rounded off. The depression 14 forms a guide surface that rotates the phase selector 2 and reaching the allowed angular positions easier. The actual 120 ° -symmetrical recording 4 lies in the bottom of the depression 14 ,

Another difference from the first embodiment lies in the arrangement and design of the locking lugs 6 , These are not at the (cut) corners, but on the legs of the equilateral triangle of the phase selector 2 arranged. Complementary to this, the recording 4 recesses on their thighs 15 on, through which the locking lugs 6 pass under elastic deformation, then elastically return to their original shape and thereby the wall of the recording 4 engage behind at the thighs.

The locking lugs 6 are in this second embodiment in cross-section hook-shaped with an opening to the rear-engaged wall. This is followed, for example, by a complementary bead into which the hook engages. In an attempt after latching the phase selector 2 again from the recording 4 to pull out breaks the hook-shaped latch 6 from. A new phase selection is thereby avoided.

Claims (15)

Connection device ( 1 ) for the stripping-free tapping of a multiphase flat cable, - a rotatable phase selector ( 2 ) and a recording ( 4 ) for the phase selector ( 2 ), - wherein at the phase selector ( 2 ) in an eccentric arrangement a tapping device is arranged, and - wherein the phase selection element ( 2 ) and the recording ( 4 ) are shaped complementarily to each other in 120 ° symmetry such that contacting one of the plurality of phase conductors with a tap contact ( 3 ), that is to say a phase selection, in the three predetermined rotational positions of the phase selection element permitted by the 120 ° symmetry ( 2 ) is possible. Connecting device according to claim 1, wherein the receptacle ( 4 ) is formed as a recess, and the phase selector ( 4 ) can be used only in the three said rotational positions in the depression. Connecting device according to one of the preceding claims, wherein the tapping device as a guide for a tapping in the movable direction ( 3 ) with a corresponding tap contact ( 3 ) or as such a guide without a tap contact ( 3 ) or as a tapping contact fixed in the tapping direction ( 3 ) or as a loading element for a tapping contact ( 3 ) is trained. Connecting device according to one of the preceding claims, wherein the receptacle ( 4 ) Passages ( 13 ) for the tapping contact ( 3 ) in 120 ° symmetry, which is a passage of the bleed contact ( 3 ) allow for the flat cable and thus the contacting of the selected phase core only in one of the three said rotational positions. Connecting device according to one of the preceding claims, wherein the phase selection element ( 2 ) in the course of the phase selection in the recording ( 4 ) can be locked in one of the three said rotational positions with respect to the phase selection made. Connecting device according to claim 5, wherein the phase selector ( 2 ) by locking in the receptacle ( 4 ) is lockable. Connecting device according to claim 5 or 6, wherein the catch is not non-destructive is solvable, so that the once made phase selection non-destructive non-reversible is. Connecting device according to claim 7, wherein the connecting device ( 1 ) nonetheless destructively separable from the flat cable after making the phase selection and reusable while maintaining the once made phase selection. Connecting device according to one of the preceding claims, wherein the device for receiving ( 4 ) complementary part of the phase selector ( 2 ) is designed mainly as a rotatable plate. Connecting device according to one of the preceding claims, wherein for defining the axis of rotation ( 11 ) of the phase selector ( 2 ) between phase selector ( 2 ) and recording ( 4 ) A stub axle stub bearing arrangement is provided. Connecting device according to one of the preceding claims, wherein for defining the axis of rotation ( 11 ) of the phase selector ( 2 ) the connection device ( 1 ) a circular depression ( 14 ) comprising the phase selector ( 2 ) rotatable about the receptacle ( 4 ) leads. Connecting device according to one of the preceding claims, wherein at the phase selector ( 2 ) a handle ( 12 ) is provided to rotate the phase selector and possibly in the recording ( 4 ), and the handle ( 12 ) in each of the three possible rotational positions on a marking marking the phase in question ( 7 ) points, so that from each of the selected phase is readable. Connecting device according to one of the preceding claims, wherein at the phase selector ( 2 ) a handle ( 12 ) is provided to the phase selector ( 2 ) and if necessary into the recording ( 4 ), and the handle ( 12 ) the tapping contact ( 3 ) at least partially surrounds to form a contact protection. Connecting device according to one of the preceding claims, wherein the tap contact ( 3 ) is formed as screwed in tapping screw or as fixed with respect to the tapping knife. Connecting device according to one of the preceding claims, wherein the connecting device ( 1 ) also comprises further tap contacts for connecting neutral and / or protective conductors and / or one or more data lines.

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