EP1513226A1 - Device for electrically connecting at least two isolated main conductors of a power supply cable, in particular cable tapping clamb - Google Patents

Abstract

At least one contact element (8,9) is provided in a housing part (6,7) for each connection that is to be made between a main conductor (2,3) of a cable and an associated branch conductor (4,5). A connecting screw (10) is arranged between the two contact elements, and when it is turned, the contact element penetrates both the insulation of the main conductor and the insulation of the branch conductor.

Description

The invention relates to a device according to the preamble of Claim 1.

Generic devices are for example from the DE 100 58 736 A1. In the known device is first the branch conductor is clamped in a contact body of the device and thereby also electrically contacted. Then penetrate the positive connection of the housing halves of the device Cutting contact means of the contact body, the insulation of the main conductor and make an electrical connection to this. Connecting the Contact body with the branch conductor and connecting the Contact body with the main conductor is therefore consecutively. In particular, first all branch conductors with the respective Contact body connected and then the housing halves joined together and thereby the connection between the Contact bodies made with the respective associated main conductor.

The invention is based on the problem, a generic To provide device which has even better properties. In particular, the assembly of the device is further simplified and the Safety during assembly should be further increased. The device should after as before a lasting and good electrical connection between the Main conductor and the respective branch conductor ensure. The Dimensions of the cable branch terminal and thus the volume of in to introduce a sleeve closing the cable branch terminal Potting compound should continue for economic and ecological reasons be minimized.

The problem is solved by the device defined in claim 1. Particular embodiments of the invention are in the subclaims certainly.

Because of the connecting screw between the two Contact elements is arranged, in particular between transversely to Screw axis adjacent main or branch conductors, the Screwing be initiated particularly favorable in the device, especially evenly on the contact elements or the main and Branch conductors are distributed. According to the size ratios of each conductor to be contacted, the distribution of the screwing force also can be predetermined uneven, for example by an eccentric Arrangement of the connecting screw. In many applications will be However, a centric arrangement of the connecting screw advantageous be. It is particularly advantageous that when screwing the Connecting screw the contact element both the isolation of Main conductor as well as the insulation of the branch conductor penetrates. Thereby the assembly work is reduced and the mounting safety increased.

The power supply cable is preferably a multi-conductor cable, as is customary, for example, for domestic connection lines with a cross-sectional area of the main conductor of, for example, about 150 mm ² and of the branch conductor of, for example, about 50 mm ² . The main conductors and / or branch conductors may be single or multi-wire. A typical application of the device according to the invention is in a three- or four-phase (including earth) power supply cable with operating voltages less than 1000 V of the low-voltage power supply network.

The inventive device is also for underground laid cable used. In this case, the device after the electrical connection closed with a sleeve and cast resin poured therein. The Housing parts of the device according to the invention are preferably made of electrically insulating plastic, in particular a fiber-reinforced Plastic, and it is preferably with mounted device and closed connection between the main and branch conductors from the outside no live parts can be felt. Preferably lead Voltage loads of 5000 V between old metal parts that no Have connection, not to an insulation breakdown.

In a particular embodiment of the invention, the contact element slidably disposed in the housing part from a starting position. This is in addition to the pure closing of the two Housing parts a relative movement between branch conductor, Contact element and main conductor possible. This can, for example also different cross-sectional shapes and cross-sectional areas of Conductor be contacted reliably.

Preferably, the contact element in the housing part by latching means fixed in the starting position, for example against falling out secured the device and on the other hand against falling into the Device and especially against accidental penetration of the Isolation of the main conductor also secured.

In a particular embodiment of the invention, the contact element plate-shaped, and preferably formed as a stamped part. For some In applications it may be advantageous to use the contact element as For example, form U-shaped punched / bent part. As a material is preferably a high-strength copper alloy used, for example a CuFe2P alloy that has a high electrical conductivity of for example, more than 32 MS / m with good mechanical strength preferably has a Vickers hardness HV greater than 140. Typical Material thicknesses are in the range between 0.5 and 5 mm, in particular about 1 to 2 mm. To improve the electrical contact properties and / or to prevent electrolytic corrosion, for example in In contact with aluminum conductors, the surface of the Contact elements with a preferably galvanically applied Tin pad provided with a layer thickness of 3 to 20 microns, in particular about 5 microns.

In a particular embodiment of the invention, the device at least two contact elements per connection of a main conductor with an associated branch conductor. Preferably, the distance is the Contact elements to each other in the longitudinal direction of the conductor to be contacted as large as possible to contact in the contact area Switch in parallel and thus the total resistance of the arrangement to lower. In addition, in multi-stranded ladders under consideration the twist of the cable ladder ensured by the axially spaced Contact elements contacted different individual wires of the conductors become.

The shape of the cutting and contact means of the contact element, For example, a tooth shape is chosen so that the associated conductors according to their nominal cross-section, their cable insulation, for example PVC, PE, any other plastic or paper wrap, theirs Conductor material, such as copper or aluminum, their conductor design, for example, round, sector-shaped or stranded, and their possible Installation position in the terminal for sector-shaped branch conductors provides permanently stable electrical contact. For this it is advantageous if by the contact force occurring a predetermined penetration of the Cutting agent in the conductor is achieved, for example, insulating To cut through surface layers, as in particular at Aluminum occur as a control material. On the other hand, the penetration depth not too large, so that not individual conductors of the ladder be severed.

In many applications, due to the invention Contact elements over the prior art, a smaller number be provided by contact points, whereby the closing force for the Device reduced when merging the two housing parts is. This can make the mechanical construction of the device more efficient be executed, the number of connecting screws can be reduced be, and the amount of torque required Connection screw can be selected lower. This is the result Assembly easier, safer and faster. At the same time they are System costs for the installation of a sleeve reduced.

In a particular embodiment of the invention, the Connecting screw on a predetermined tear-off torque on. Preferably, in particular the screw head tears after exceeding of the tearing torque. It becomes possible for many applications be the device with a single central connecting screw equip. If necessary, several can Be provided connecting screws, in particular in the direction of contacting main conductor or branch conductor in succession and / or be arranged side by side. According to a special one Embodiment, the device through the connecting screw contrary to the prior art, not up to a positive connection screwed, but up to a predetermined torque. This predefinable torque depends on the geometry of the contact elements, the insulating material of the main or branch conductor, the Conductor cross-section, as well as the geometry of the housing parts from. Especially can by the predetermined breakaway torque one and the same Device for different conductor cross sections are used.

In a particular embodiment of the invention has at least one Housing part between the contact elements a preferably sleeve-shaped separating element for receiving the connecting screw on. The separating element itself can preferably be made of electrical Insulate plastic, preferably in one piece from the Housing half formed. The separating element also serves a separation the inserted in the device main conductor and can for this purpose especially in cross section not only circular, but for example be elliptical, thereby the swirl of the power supply line to match and the merging of the housing parts with less To allow effort. In the separating element, an inner sleeve be used with an internal thread, preferably elongated is to engage the connecting screw at a relatively large To allow opening of the two housing parts.

In a particular embodiment of the invention, the two are Housing parts connected by a pivot joint. there can the open position of the device by appropriate locking means be tool-releasably lockable. In this open position, the Device for example on the freed from the jacket insulation and Pre-spread power supply cables are placed. Subsequently can the two housing parts from the latched open position in a Closed position to be transferred. For this purpose, the two housing parts preferably cooperating locking means, which in the closed position engageable with each other. This is a placement of Device on the power cable possible without the Contact elements of the device in conjunction with the main conductor or are the branch conductor. This pre-assembly may preferably without tools, in particular without screwing the Connecting screw. For power supply cables with larger Diameter can be pre-assembled using a suitable Tool done, such as a pair of pliers, wherein the housing parts have corresponding tool engagement surfaces. The solubility off This pre-assembly position is preferably not possible without tools. In this pre - assembly position is excluded that the isolation of the Main conductor of metallic components of the cable branch terminal can be penetrated.

By the device according to the invention is in particular a work Under tension possible, preferably even without personal Protective gear. For this purpose it is ensured that in every phase of the assembly the live parts are always covered safe to touch. This also includes protection against direct contact in case of false Handling of tools. There is no bridging option of live parts due to incorrect handling of a Tool. A stripping of the branch conductor is not required why the Absetzmaß for stripping the insulation no error may appear to bare after closing the device could lead to protruding vein ends, which then lead to tension.

In a particular embodiment, the device is in a Parting plane of the two housing parts on a supporting wedge, the one preferably forms elastically deformable abutment for the main conductor. As a result, the required contact force is also at Temperature cycling permanently guaranteed.

In a particular embodiment of the invention, the support wedge has a Stop surface for a in the placement of the device on the Power supply cable suitable for spreading the main conductors Spreading wedge on. This is the exact positioning of the main conductor in Referring to the device and in particular with respect to the Guaranteed contact elements.

In a particular embodiment, the device has at least a screw end a pressure plate for introducing the screwing in the device on. As a result, the screwing force can be specified, especially evenly, are introduced into the housing part and in particular the occurrence of bending forces in the plastic housing parts be reduced to an uncritical level.

Fig. 1

zeigt eine perspektivische Ansicht eines ersten Ausführungsbeispieles einer erfindungsgemäßen Vorrichtung,

Fig. 2

zeigt die Kabelabzweigklemme der Fig. 1 in einem früheren Stadium der Montage,

Fig. 3

zeigt eine perspektivische Ansicht eines Kontaktelements,

Fig. 4

zeigt eine perspektivische Ansicht des Gehäuseteils,

Fig. 5

zeigt eine perspektivische Ansicht der weiteren Druckplatte,

Fig. 6

zeigt eine Unteransicht der Druckplatte, und

Fig. 7

zeigt eine perspektivische Ansicht eines zweiten Ausführungsbeispieles.

Further advantages, features and details of the invention will become apparent from the dependent claims and the following description in which several embodiments are described in detail with reference to the drawings. The features mentioned in the claims and in the description may each be essential to the invention individually or in any desired combination.

Fig. 1

shows a perspective view of a first embodiment of a device according to the invention,

Fig. 2

shows the cable branch terminal of Fig. 1 at an earlier stage of assembly,

Fig. 3

shows a perspective view of a contact element,

Fig. 4

shows a perspective view of the housing part,

Fig. 5

shows a perspective view of the further printing plate,

Fig. 6

shows a bottom view of the printing plate, and

Fig. 7

shows a perspective view of a second embodiment.

Fig. 1 shows a perspective view of a first Embodiment of a device according to the invention for electrical connection of at least two insulated main conductors 2, 3 a power supply cable, each with at least one isolated Branch conductor 4, 5, wherein the main and branch conductors 2, 3, 4, 5 only are shown schematically, with a housing, the at least two by a connecting screw 10 connectable housing parts 6, 7th wherein, for each connection to be made between a Main conductor 2, 3 and the associated branch conductor 4, 5 at least one Contact element 8, 9 is arranged in a housing part 6. The Connecting screw 10 is between the two contact elements 8, 9th arranged. When screwing the connecting screw 10 penetrates the Contact element 8, 9 both the insulation of the main conductor 2, 3 and the Isolation of the branch conductor 4, 5. The housing halves 6, 7 are preferably produced as an injection molded part.

The illustrated embodiment may have a total of four main conductors 2, 3 record, and connect each with a branch conductor 4, 5. The housing halves 6, 7 are made of a fiber-reinforced plastic. In the parting plane of the two housing halves 6, 7 is a support wedge 11th arranged to penetrate the usually soft, non-pressure resistant Isolation of the main conductors 2, 3, for example made of PVC consists. The task of the supporting wedge 11 is to provide a mechanical pressure-resistant, electrically insulating and, if necessary, spring-force-storing To obtain support on the metallic conductor, preferably by means Cutting 12 or tips, which the insulation of the main conductor 2, 3rd penetrate, and with between the tips or cutting 12 arranged spaces that the displaced insulation material take up.

The main conductors 2, 3 are between the support wedge 11 and the Contact elements 8, 9 clamped. The branch conductors 4, 5, the opposite the main conductor 2, 3 usually a smaller cross-sectional area have, between the contact element 8, 9 and the pressure plate 13 clamped. The pressure plate 13 has on the branch conductor 4, 5th facing surface also according to the support wedge 11 cutting 14th or tips which penetrate the insulation of the branch conductor 4, 5 and rest on the metallic ladder. By the pressure plate 13 the screwing force on the branch conductor 4, 5 in the clamping compound initiated. The pressure plate 13 has an internal thread for receiving the Connecting screw 10 on.

Near the screw head 15 of the connecting screw 10 is another Pressure plate 16 is arranged, which is constructed substantially identical as Basically, it would be possible, the pressure plates 13, 16 integrally formed, for example by a suitable ceramic, or a thermoset or thermoplastic with high fiber addition of for example, long glass fibers. In the illustrated embodiment however, the pressure plates 13, 16 are designed in two parts, in particular consisting of a thermoplastic plastic part 17, for example made of polyamide with a glass fiber content of 30%, and a Reinforcement 18, for example made of sheet steel or one Coated non-ferrous metal, for introducing the screwing force into the Plastic part 17.

In the Armierungsteil the pressure plate 13 is a sleeve with internal thread for receiving the connecting screw 10 is pressed. In the Arming part 18 of the further pressure plate 16 is a support for the Screw head 15 incorporated. Preferably, the connecting screw 10 connected to the plastic part 17 by a captive. The Connecting screw 10 also has a tearing torque, in illustrated embodiment formed by a puncture 19 close the screw head 15. There are other alternatives to the realization of the Abreißdrehmomentes conceivable, for example, the provision of a Plastic cap on the screw head 15 with an outside accessible tool engagement surface. After tearing off the Screw head 15 is the connecting screw 10 in any case with the same tool can not be solved again.

Fig. 2 shows the cable branch terminal 1 of FIG. 1 in a opposite the position shown in FIG. 1 earlier stage of assembly. The two housing parts 6, 7 are by means of a pivot joint 20th connected with each other. By pivoting the two housing parts 6, 7 can the cable branch terminal 1 in the position shown in FIG be placed on the power cable, the support wedge 11 between the previously spread by means of a wedge 41 main conductor is introduced, wherein the expanding wedge 41 substantially at right angles to the longitudinal axis of the main conductors 2, 2a, 3, 3a and / or at right angles to Longitudinal extent of the support wedge 11 extends. The support wedge 11 forms preferably in one piece a contact surface 21, which when placing the Cable branch terminal 1 on the power supply cable in contact with the inserted spreading wedge 41 is brought, the gestalt in Fig. 2 is shown. The position of the contact surface 21 with respect to the support wedge 11 ensures the correct positioning of the main conductors 2, 3 in relation on the contact elements 8, 9 within the cable branch terminal. 1

In the illustrated starting position, the contact elements 8, 9 by preferably integrally formed by the housing part 7 locking means 22, 23 secured against falling out of the cable branch terminal 1, in illustrated embodiment by a deflectable retaining finger, which engages in a corresponding bore in the contact element 8, 9. at the later final assembly by screwing the connecting screw 10th if the locking effect of these locking means 22, 23 is canceled, for example, by the stationary with respect to the housing part 6, 7 Arretierungsmittel 22, 23 due to the movement of the contact elements 8, 9th with respect to the housing part 6, 7 cancel.

For pre-assembly, the cable branch terminal 1 from that in FIG. 2 shown position by closing the two housing parts 6, 7 to the Main conductor 2, 2a, 3, 3a closed. For this purpose, the housing parts 6, 7 cooperating locking means 24, 25 which engage with each other can be brought. After closing and locking the housing parts 6, 7 there is a setting process of the main conductor 2, 2a, 3, 3a, which is form fit to the housing parts 6, 7 create. Also when screwing the Connecting screw 10 for closing the cable branch terminal 1 it comes to setting operations between the strained main and Branch conductors 2, 2a, 3, 3a, 4, 5 with the support wedge 11, the Contact elements 8, 9 and the pressure plates 16, 17. The time required and the way for screwing the connecting screw 10 is preferably so chosen that the setting operations until the positive attachment of all involved plastic parts depending on the geometry and the materials the main and branch conductor 2, 2a, 3, 3a, 4, 5 is completed before the Tightening torque for electrically permanently safe contact is reached.

Optionally, the placement of the cable branch terminal 1 on the Power supply cable by means of a percussion tool, for example by means of a hammer, and the pivot joint 20 has a striking surface 26 for this purpose. In addition, the swivel joint has 20 cooperating with the housing parts 6, 7 stop surfaces, which prevents it from opening beyond a maximum open position is.

The support wedge 11 preferably has with the housing parts 6, 7th cooperating latching means, through which the in Fig. 2 illustrated open position of the cable branch terminal 1 are releasably fixed can. Preferably, the support wedge 11 is exchangeable, in particular in terms of its dimensions to different cross-sectional areas the main conductor 2, 3 customizable.

Fig. 3 shows a perspective view of a contact element 8, the is formed substantially as a stamped part of a trapezoidal shape correspondingly suitable copper alloy with sufficient conductivity and at the same time sufficient strength. The side surface with the smaller teeth 27 is associated with the branch conductor 4, while the Side surface with the larger teeth 28 is associated with the main conductor 2. The tips of the teeth 27, 28 are each on a curved line 29, 30, which, for example, simulates the contour of the conductor to be contacted. Furthermore, the contact element 8 has a bore 31 for engagement of the locking means 22. In addition, the contact element 8 with a the housing part 6 cooperating sliding surface 32 on which the Contact element 8 in the housing part 6 is slidably displaceable.

Fig. 4 shows a perspective view of the housing part 6. For each Pair of main and branch conductors 2, 4 to be connected together or 3, 5 are a total of 4 receptacles 33 for contact elements 8, 9th intended. In each receptacle 33 is of the housing part 6 in one piece a nose 34 is formed between two teeth 28 of the Contact element 8 engages and falling into the contact element 8 in Direction to the main conductor 2, 3 prevented.

The position assurance of the contact elements 8, 9 by means of the lugs 34 and / or the locking means 22, 23 (Fig. 2) is preferably not by hand force to overcome and therefore also prevents accidental Penetrating the insulation of the conductors, in particular the under electrical Tensioned main conductor 2, 3 during the placement of the Branch conductor 4, 5. Preferably in each receptacle 33 on each side opposite at least one nose 34 is formed to also a tilting or jamming of the contact element 8 in the Intake 33 to prevent. During final assembly by screwing in the Connecting screw 10, the position backup is canceled, for example, by breaking off the noses 34.

The housing part 6 further integrally forms a cross-section in the essential elliptical or diamond-shaped separator 35 for the Recording the connecting screw 10 or the pressure plates associated sleeves. The ellipse or diamond shape bears that of Cable to cable different swirl in the ladder network bill. In addition, this is the connecting screw 10 to the main and Branch conductors 2, 3, 4, 5 out additionally covered by insulating material. Furthermore, characterized have the mutually associated locking means 24, 25 of the Housing parts 6, 7 sufficient movement play that they are safe with each other hook and form a stable positive engagement.

Each receptacle 33 forms a slideway 36, on which the sliding surface 32 of the contact element 8 can be brought into abutment. When mounting the Cable branch terminal 1 move the contact elements 8 with their Sliding surface 32 along the slide 36. The angle between the Longitudinal axis of the connecting screw 10 and the slide 36 is preferably several degrees, for example between 2 and 25 °, preferably between 5 and 15 ° and in particular about 10 °. By an externally visible gap can also be visually inspected be whether the contact elements 8, 9 sufficient during assembly were lowered, d. H. sure a contact between the branch conductor 4, 5 and the main conductor 2, 3 have made. By lowering the Contact elements 8, 9 within the housing part 6 is also the Guaranteed contact safety in the assembled state.

FIG. 5 shows a perspective view of the further pressure plate 16 with the connecting screw 10 before tearing off the screw head 15. It is on the visible in FIG. 1 metallic reinforcing member 18th an electrically insulating cover 37 mounted, preferably made a soft elastic deformable material. After tearing off the Screw head 15 thus results in a relatively smooth Surface without live parts, especially without touchable metallic parts.

The deformable insulating cover 37 of the further pressure plate 16, which may accordingly be provided for the pressure plate 13, closes after tearing off the screw head 15, the remaining Opening in any case so that no metallic parts are touched; for example, the degree of protection IP2 is achieved, i. safe against one Finger touch. On the pressure plate 13 is replaced by the corresponding insulating cover covered any screw overhang.

Fig. 6 shows a bottom view of the pressure plate 13, the plastic part preferably in one piece a pin with elliptical base forms, in which a metallic threaded sleeve 38 is pressed to Recording the connecting screw 10. Also on the pressure plate 13 is a preferably soft elastic deformable cover can be placed.

The elliptical base of the pressure plates 15, 16 fit positively into the recess of the separating element 35 of FIG. 4. The printing plates 15, 16 can be loose in the delivery state of the cable branch terminal 1 be enclosed and without likelihood of confusion depending on the advantageous Mounting position from above or from below into the housing parts 6, 7th be used. The elliptical shape facilitates the alignment of the Parts to each other even without visual contact to the bottom of the Cable branch terminal 1. When screwing in the connecting screw 10 in the threaded sleeve 38, the parts center each other in the intended positive end position. Both the elliptical base as Also, the separator can be made of electrically insulating plastic be made to additional insulating barriers between the To provide metal parts of the screw and cable ladders.

Fig. 7 shows a perspective view of a second Embodiment of a cable branch terminal according to the invention 101. The pressure plate 113 and the further pressure plate 116 respectively preferably integrally formed arcuate insertion aids 139 for the branch conductor on. The of the housing parts 106, 107 together with the pressure plate 113, 116 radially limited insertion channels are axially through an integrally formed from the housing part 106, 107 wall 140th limited. This is a touch of a stressed Branch conductor 4, 5 in the assembled state of the cable branch terminal 101 prevented. At the same time, the distance of the receptacle 133 for the Contact elements 8, 9 selected from the wall 140 so large, for example a few millimeters, especially about 7 mm, thus dimensional variations when cutting the branch conductors 4, 5 can be tolerated without the contact is impaired.

In the position shown in Fig. 7 are the printing plates 113, 116 with respect to the respective associated housing part 107, 106 in a starting position or open position, which they also in the in Fig. 2 shown position of the cable branch terminal 1 can take. This starting position can by cooperating locking means to the Pressure plates 113, 116 and the housing parts 106, 107 releasably latched. The of the pressure plates 113, 116 and the housing parts 106, 107 limited insertion channels are open laterally in this starting position, so that, for example, less rigid branch conductors 4, 5 during assembly can be inserted laterally into the insertion channels.

In a further embodiment of the invention, the housing parts Means for fixing the introduced into the insertion channel branch conductor 4, 5th although fixed, but not contacted electrically. The Means for fixing, for example, by commercial Cable tie may be formed by integrally from the housing parts 6, 7th trained eyelets are guided while a loop for the Passage of the branch conductor 4, 5 form, the eyelets and the may have associated latching means. Preferably is for everyone Branch conductor 4, 5 provided an individual means for fixing.

Claims (15)

Device for electrically connecting at least two insulated main conductors (2, 3) of a power supply cable, each having at least one insulated branch conductor (4, 5), in particular cable branch terminal (1, 101), with a housing which can connect at least two connecting screws (10) Housing parts (6, 7, 106, 107), wherein for each connection between a main conductor (2, 3) and the associated branch conductor (4, 5) at least one contact element (8, 9) in a housing part (6, 7; 106, 107), characterized in that the connecting screw (10) between the two contact elements (8, 9) is arranged, and that when screwing the connecting screw (10), the contact element (8, 9) both the insulation of the main conductor ( 2, 3) and the insulation of the branch conductor (4, 5) penetrates. Apparatus according to claim 1, characterized in that the contact element (8, 9) from a starting position displaceable in the housing part (6, 7, 106, 107) is arranged. Apparatus according to claim 1 or 2, characterized in that the contact element (8, 9) by a locking means (22, 23, 34) releasably in a starting position in the housing part (6, 7) is held. Device according to one of claims 1 to 3, characterized in that the contact element (8, 9) is planar or curved flat, in particular plate-shaped. Device according to one of claims 1 to 4, characterized in that the device comprises at least two contact elements (8, 9) per connection main / branch conductor. Device according to one of claims 1 to 5, characterized in that the connecting screw (10) has a predetermined Abreißdrehmoment. Device according to one of claims 1 to 6, characterized in that at least one housing part (6, 7; 106, 107) between the contact elements (8, 9) has a separating element (35) which separates adjacent main conductors (2, 3). Device according to one of claims 1 to 7, characterized in that the two housing parts (6, 7; 106, 107) are interconnected by a pivot joint (20). Device according to one of Claims 1 to 8, characterized in that the two housing parts (6, 7; 106, 107) have cooperating latching means (24, 25). Device according to one of claims 1 to 9, characterized in that the device in the parting plane of the two housing parts has a support wedge (11). Apparatus according to claim 10, characterized in that the support wedge has a stop surface (21) for a in the placement of the device on the power cable for spreading the main conductors (2, 3) usable expanding wedge (41). Device according to one of claims 1 to 11, characterized in that the device has at least one end of a screw a pressure plate (13, 16, 113, 116) for introducing the screwing force into the device. Apparatus according to claim 12, characterized in that the pressure plate (13, 16, 113, 116) with the housing part (6, 7, 106, 107) cooperating latching means, through which the pressure plate (13, 16, 113, 116) in a starting position is detachably durable. Device according to one of claims 1 to 13, characterized in that the housing part (6, 7) comprises means for fixing, through which the introduced into an associated insertion channel branch conductor (4, 5) can be fixed in a pre-assembly of the device. Device according to one of claims 1 to 14, characterized in that by multiple nesting of insulating materials on the components of the device in cooperation with the isolation of the main conductors (2, 3) and branch conductors (4, 5) in each phase of the assembly of the device energized main conductors (2, 3) the contact safety and bridging security is given.

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