Clamping device

Abstract

A clamping device, in particular in the form of a connection terminal (10) for a transformer, having a clamping body (12) which has individual contact-making points in the form of receptacles (14, 15) for electrical conductors (16), such as transformer candles (18) and connection cables (20), which are at least partially introduced into boundary walls (22) which are arranged between two mutually opposite boundary walls (24) of the clamping body (12), the mutually opposite boundary walls being kept free of receptacles (14, 15) passing into the clamping body, characterized in that - at least one receptacle (14) for introducing a conductor (16), such as a transformer candle (18), is provided in each of two mutually adjacently adjoining boundary walls (22a, b), and - at least one further receptacle (15) for a further conductor (16), such as a connection cable (20), is provided in boundary walls (22c, d, e, f), which are situated opposite said boundary walls (22a, b) with the respective introduction receptacle (14).

Description

[0001] 40rrp / 131950AVO

[0002] PFISTERER CONTACT SYSTEMS GMBH

[0003] Rosenstraße 44, 73650 Winterbach, Germany

[0004] Clamping device

[0005] The invention relates to a clamping device, in particular in the form of a terminal block for a transformer, with a clamping body having individual contact points in the form of receptacles for electrical conductors, such as transformer plugs and connecting cables, which are at least partially inserted into boundary walls arranged between two opposing boundary walls of the clamping body, which are held free of such receptacles.

[0006] EP 2 063 491 B1 discloses a terminal block for a transformer, in particular for a transformer for transforming a voltage to low voltage, comprising a clamping body having a threaded bore for screwing the clamping body onto a terminal bolt of the transformer, wherein the clamping body is slotted in the area of ​​the threaded bore and has means for adjusting the clamping body areas located in the area of ​​the slot for clamping the clamping body and terminal bolt, and comprising at least one device for clamping at least one connecting conductor, wherein an earthing bolt is connected to the terminal block, and the at least one device for clamping the at least one connecting conductor has an attachment 40rrp / 131950A / VO

[0007] 2. The terminal plate has at least two projections, each projection serving to attach a conductor terminal and the terminal plate being connected to the terminal body.

[0008] During installation and maintenance work, personnel can directly connect the earthing bolt they carry to the terminal block and attach an earthing cable to the earthing bolt. This allows any third person working on the system to see at a glance that the transformer is de-energized and that it is therefore safe to work on the electrical system.

[0009] EP 1 638 166 A1 discloses an arrangement for fastening connecting cables to the low-voltage connection of a power supply unit, which is formed by a threaded bolt at the terminal end of an insulating candle, on which the fastening side of a terminal block is fixed by means of a screw nut, wherein the terminal block has paired penetrating bores at its end facing away from the fastening side, at least one of which is designed as a threaded bore for screwing in an associated clamping screw, the screw head of which acts on a connecting cable inserted into the other bore.The terminal clamp has a through-hole on its mounting side of at least the size of the nominal diameter of the threaded bolt, and by means of opposing axial clamping devices to be attached to both sides at the ends of the through-hole on the threaded bolt, the terminal clamp can be fixed on the threaded bolt in any rotational position and at the same time in any height position.

[0010] The familiar terminal block can therefore be initially mounted on the threaded bolt 40rrp / 131950A / VO in both a rotational and a vertical position.

[0011] 3 of the insulation candle are positioned so that the connecting cable can be easily inserted into the corresponding hole, and is then fixed in place using a clamping screw.

[0012] Based on this state of the art, the invention aims to further improve known clamping devices in such a way that more degrees of freedom are available for optimizing electrical and mechanical conductor contact.

[0013] A clamping device with the features of claim 1 in its entirety solves such a problem.

[0014] By providing, according to the characterizing part of claim 1, that at least one receptacle for inserting a conductor, such as a transformer plug, is provided in each of two adjacent boundary walls, and that at least one further receptacle for a further conductor, such as a connecting cable, is provided in boundary walls opposite these boundary walls with the respective insertion receptacle, a so-called bidirectional conductor exit is achieved; in particular, a bidirectional pluggable plug connection is enabled, so that the clamping device with its clamping body can be easily placed onto a transformer plug in two independent insertion or insertion directions, which increases the variability of the connection solution with the clamping device according to the invention.Since the size of transformers is becoming increasingly smaller, and thus the distances between the feedthroughs are also reduced, the clamping width available for installation or mounting is also reduced, and with the solution according to the invention it is possible to use larger clamping devices with larger openings for widening cable cross-sections or possibly 40rrp / 131950A / VO.

[0015] Four additional cables or conductors can be mounted at the same spacing as before. In particular, the clamping device can be mounted on the respective transformer socket in different installation directions, thus increasing the possibility of routing the connecting cables from different directions and securely fixing them to the clamping device.

[0016] The ability to selectively insert a transformer terminal into the corresponding receptacle of a pair of adjacent receptacles along different surfaces of the clamping device by simply plugging it in not only simplifies assembly but also disassembly of the clamping device. Previously, to unscrew a clamping body from the transformer bushing, all other conductors, such as connecting cables, had to be disconnected first; however, with the clamping device according to the invention, the entire clamp, including the connected conductors, can simply be pulled off the transformer bushing of the respective transformer terminal after the clamp is released. Such disassembly is necessary, for example, when the current-carrying or voltage-carrying phases need to be replaced or when a defective transformer needs to be replaced as a whole.

[0017] In a preferred embodiment of the clamping device according to the invention, the free diameter of the receptacles for inserting a conductor, such as a transformer core, is adjustable by means of a clamping device in the clamping body. It is further preferred that the receptacles with their adjustable diameters serve for inserting, in particular, the respective conductor, especially in the form of the transformer core, which can be releasably secured in the respective receptacle by means of the clamping device. With only a single clamping device and its central actuation, the free diameters of both receptacles intended for a transformer core can be freely adjusted, which helps to reduce the effort required for operation.In particular, very little assembly time is required to use the clamping device to position the clamping body on the free end of a transformer candle in different directions as needed and to fix it in place.

[0018] It is preferably provided that the adjacent insertion or insertion receptacles open into a common slot opening, which extends through the clamping body and has a connection to the outside. This slot opening is penetrated by a clamping screw within the clamping body, which, as part of the clamping device, varies the size of the slot opening. In this way, the clamping body can be selectively and reliably attached to an associated transformer candle in preferably two mutually perpendicular directions using a single clamping screw.

[0019] In a further preferred embodiment of the clamping device according to the invention, the wall thickness of the wall boundaries of the respective insertion recess, which transition into the two opposing boundary walls, is uniform and preferably thin-walled, and / or a further material reduction occurs in the clamping body in addition to the slot opening, in particular in the form of at least one additionally arranged slot and / or a material reduction on the clamping body provided for clamping. This makes it possible to actuate the clamping screw on the clamping body for a clamping operation with only one predefinable torque value, regardless of the size of the clamping body.For example, if the material thickness of a clamping body is chosen to be very large due to connection requirements, the proposed material weakening, be it in the form of slots, material removal or a suitable material selection, can still be achieved with single and 40rrp / 131950A / VO.

[0020] 6. The same tightening torques can be achieved for a clamping operation using the same adjustment mechanism or clamping device as for a smaller clamping body. Therefore, a large number of clamping connections for individual conductors with various clamping devices can be reliably produced according to this technical principle using only one operating tool, such as a torque wrench with a preset tightening torque.

[0021] In a further preferred embodiment of the clamping device according to the invention, the additional receptacles are grouped in pairs and each have a receiving channel for inserting an additional conductor, such as a receiving cable, and a securing channel for inserting a securing element, such as a securing screw, to secure the additional conductor in the receiving channel of that pair. The receiving channel for inserting the additional conductor or receiving cable is provided with grooves on its inner circumference or is smooth. The securing channel, on the other hand, is provided with an internal thread for screwing in a corresponding securing screw, which extends at least partially through the receiving channel with its free end face along a passage for the purpose of releasably clamping the additional conductor in the receiving channel.

[0022] In an alternative embodiment, both the receiving channel and the securing channel may preferably each have an identical internal thread, so that the function of the receiving channel and securing channel is interchangeable as needed. This means that the additional conductor or connecting cable can be clamped in the securing channel of the clamping device by screwing the securing screw into the thread of the receiving channel, thereby clamping the conductor in the securing channel via a corresponding opening in the receiving channel. This would allow the functions of the receiving channel and securing channel to be interchangeable within this pair of receiving channels. This allows for [40rrp / 131950A / VO]

[0023] 7 pairs of receptacles are again provided in the further boundary walls and preferably perpendicular to each other, serving from one side for the insertion of a further conductor, such as a receiving cable, which is then fixed from the other side, i.e., receptacle, by means of a fixing means in the assignable receptacle for a current- or voltage-carrying transition with the transformer candle.

[0024] Preferably, at least one of the further receptacles is provided with an internal thread into which a clamping or locking screw, as the locking element, can be releasably screwed with its external thread. It is possible to select the same diameters for all further receptacles, as well as for the diameters of the locking screws and the internal threads of the receptacles and external threads of the locking screws that form a threaded section together.

[0025] In a particularly preferred embodiment, the clamping body is designed in the form of an angled polyhedron, resulting in an L-shaped profile. This allows for the connection of individual conductors to the clamping body from various directions. The body thus formed fulfills Euler's polyhedron theorem.

[0026] Preferably, a body is formed in which the two opposing boundary walls receive the slot opening between them and are penetrated by the clamping device, wherein the two adjacent boundary walls meet at right angles along an edge between these two boundary walls, and wherein the respective insertion recess for the respective conductor, such as a transformer candle, merge into each other at their ends, perpendicular to each other, so that a "good leverage effect" is created for the clamping device for securing conductors in the respective insertion recesses.

[0027] In a further advantageous embodiment of the clamping device, the boundary walls with the additional receptacles are arranged at least partially at right angles to one another and offset from each other in such a way that at least four additional receptacles are created for receiving conductors and / or securing means, and that in each angled section of the polyhedron formed by the boundary surfaces, at least two receptacles for one additional conductor, such as a receiving cable, point in the same direction. This creates a kind of block structure for the clamping device as a whole, which can be widened accordingly to receive additional conductors, so that in directions transverse to the insertion direction of the additional conductors, the boundary surfaces can be enlarged such that at least in one direction more than one additional conductor can be received in the associated receptacle, for example, groups of 2, 4, 6, 8...More ladders seen in one direction.

[0028] The clamping device according to the invention will now be explained in more detail with reference to embodiments shown in the drawing. Figures 1 to 3 show different perspective views of the device in a general and not to-scale representation.

[0029] Clamping device as a whole, with Figure 3 showing a longitudinal section;

[0030] Figure 4 shows a modified embodiment, provided for the connection of four connecting cables, in a corresponding representation as shown in Figure 1;

[0031] Figures 5 and 6 show different embodiments relating to a material weakening in the clamping body; and 40rrp / 131950A / VO

[0032] 9

[0033] Figures 7 to 10 show different ladder configurations

[0034] Clamping body of the clamping device in various perspective bottom views and side views.

[0035] The clamping device shown in the figures is designed as a terminal block 10 for a transformer (not shown). It is understood that the clamping device is also suitable for other applications where a large number of identical or different conductors of a connecting cable need to be secured.

[0036] The terminal block 10 has a clamping body 12 which has individual contact points in the form of receptacles 14, 15 for electrical conductors such as transformer plugs 18 or connecting cables 20. These receptacles 14, 15 are provided in individual boundary walls 22 a, b, c, d, e, f, which are arranged between two opposing boundary walls 24 of the clamping body 12. These two parallel, opposing boundary walls 24 of identical design are continuous and free of receptacles 14, 15.

[0037] In two adjacent boundary walls 22a, b, a receptacle 14 for inserting an associated conductor 16, such as the transformer candle 18, is provided on the rear side of each. In the further boundary walls 22c, d, e, f, located opposite the boundary walls 22a, b with their respective insertion receptacles 14, at least one further receptacle 15 for an associated additional conductor 16, in particular in the form of a connecting cable 20, is provided. The connecting cable 20 is shown only partially and in sections with its front end in the figures and concentrically surrounds the associated additional conductor 16 with cable insulation. 40rrp / 131950A / VO

[0038] 10

[0039] The two receptacles 14 consist of hollow cylindrical bores whose longitudinal axes are perpendicular to each other and which open to the outside at their respective free ends, as shown in Figure 2. On the opposite side, the two bores open with smooth bore walls onto adjacent wall surfaces of the clamping body 12. The free diameter of the receptacles 14 for inserting a conductor 16, such as a transformer plug 18, can be changed by means of a clamping device 26 in the clamping body 12. Thus, the receptacles 14 with their variable diameters serve to insert the respective conductor 16, in particular in the form of the free end of the transformer plug 18, whereby the conductor 16 can be releasably secured in the respective receptacle 14 by means of the clamping device 26.In this way, the clamping body 12, with its lower limiting wall 22b and the associated lower recess 14, can be placed from above onto the partially shown transformer bushing 18, as illustrated in Figures 7 and 8. The bushing 18 can also be designed in the form of a so-called transformer bushing. The bushing 18 is designed in the form of a cylindrical bolt, as shown. In any case, the transformer bushing 18 can be provided with an external thread in the connection area, although this is not mandatory and is not shown. The term "transformer bushing" shall be used for all these embodiments.

[0040] If the terminal block 10 or the clamping body 12 is rotated from its position according to Figures 2, 7 and 8 into a position according to the illustration according to Figures 9 and 10, the rear boundary wall 22 a then forms the underside and can then be placed on the transformer candle 18 or transformer bushing at the end with its associated receptacle 14.

[0041] As can be seen from Figures 2, 7 and 9, the adjacent insertion or plug-in receptacles 14 lead into a common 40rrp / 131950A / VO

[0042] 1 1

[0043] A slot opening 28, which partially penetrates the center of the clamping body 12, provides a connection to the outside or the surrounding environment. This slot opening 28 is located adjacent to a transverse edge 30, at which the two adjacent boundary walls 22a and 22b meet at right angles. A clamping screw 32, part of the clamping device 26, penetrates the slot opening 28, which has a partially cuboidal cross-section. The screw head 34 rests parallel to a front boundary wall 24, as shown in Figure 2. The external thread of the clamping screw 32 engages, at least at its end, in a corresponding screw receptacle 36 with a corresponding internal thread in the clamping body 12. By applying a predetermined tightening torque to the screw head 34, the slot opening 28 can be reduced to secure the transformer candle 18 in the respective receptacle 14.By turning the clamping screw 32 in the opposite direction, it can also be loosened again, for example during disassembly. For this purpose, the clamping screw 32 has a suitable geometry at its head 34, for example in the form of an internal hexagon, for engaging an actuating tool such as an Allen key. Furthermore, the free end of the clamping screw 32 extends to the opposite boundary wall 24, which is located opposite the boundary wall 24 with the screw head 34.

[0044] All boundary walls 22 a, b, c, d, e, f are perpendicular to the parallel lateral boundary walls 24, so that a polyhedron is realized for the clamping body 12 as a whole, with a total of eight boundary walls 22, 24 or boundary surfaces in the form of polygons. Furthermore, in its idealized L-shaped state, without including the relief or transverse channel 38, the polyhedral body has a total of twelve vertices and eighteen lateral edges, including 40rrp / 131950A / VO

[0045] 12 of edge 30. In an alternative embodiment not shown, edge 30 can also be provided with a chamfer or a rounded edge, which applies to all edges occurring on the clamping body 12. The clamping body 12 itself is composed of two cuboid base bodies 40, 42, which have the two receptacles 14 in the area of ​​their angled housing transition 44. In the embodiment according to Figures 1 to 3, the two cuboid base bodies 40, 42 are in any case cube-shaped and the housing transition 44 is perpendicular. Thus, the clamping body as a whole fulfills Euler's polyhedron formula: E - K + F = 2 with E = 12 vertices, K = 18 edges and F = 8 faces.

[0046] Each cuboid base body 40, 42, here in cube form, has further receptacles 15, which are grouped in pairs and each have a receiving channel 46 for inserting an additional conductor 16, in particular in the form of a receiving cable 20, and each have a retaining channel 48 for inserting a retaining element 50 to secure the respective additional conductor 16 in the receiving channel 46 of this pair. For this purpose, as shown in Figure 3, the receiving channel 46 is provided with a contact groove design 49 with parallel grooves partially incorporated on its inner circumference, and the retaining channel 48 for inserting a retaining element 50 has a corresponding internal thread 52. Both the receiving channel 46 and the retaining channel 48 are components of a pair of receptacles 15 as shown.The respective receiving channel 46 as well as the respective fixing channel 48 of a pair in a cuboid base body 40, 42 are perpendicular to each other with their longitudinal axes, as is the groove design 49 or internal thread 52 assigned to them.

[0047] Preferably identically designed fixing screws 54 serve as fixing means 50, which are inserted with their external thread (not shown) into the respective 40rrp / 131950A / VO

[0048] The 13 internal threads 52 are screwed in and out. As shown in Figures 7 and 8, a conductor 16 in the form of a connecting cable 20 (only partially shown) is inserted from the left free end face of the clamping body 12 into the free opening in the form of the receiving channel 46 and clamped from above in the receiving channel 48 in the corresponding receptacle 15 by means of the pressure or locking screw 54. Viewed from the direction of Figures 7 and 8, the lower connecting cable 20 with its conductor 16 is inserted laterally first, and the corresponding adjacent locking element 50 in the form of the pressure screw 54 clamps the connecting cable with its conductor 16 from above in the lowest receptacle 15 of the cuboid base body 42. The connecting cable 20 arranged above it is then secured with its associated pressure screw 54 in the securing channel 48.Both connecting cables 20 preferably run parallel to each other, as do the two pressure screws 54, which, in the fixed state, are positioned with their screw-in axes perpendicular to the insertion device of the two connecting cables 20. Furthermore, the connecting cables 20, with their conductors 16 kept free of insulation at their ends, run perpendicular to the transformer candle 18.

[0049] In the correspondingly tilted or pivoted position of the clamping body 12 as shown in Figures 9 and 10, the transformer socket 18 or the transformer bushing engages in the clamping body 12 via the respective lower receptacle 14, viewed from below in the direction of view of Figures 7 to 10; however, the further receptacles 15 for the connecting cables 20 "move" from their front-end arrangement according to Figures 7 and 8 to an engagement arrangement vertically from above, whereby the longitudinal axes of the transformer socket 18 and the connecting cables 20 are now arranged in the same direction, preferably parallel to each other. As shown in Figures 9 and 10, the 40rrp / 131950A / VO is initially viewed from below in the direction of view of the figures.

[0050] 14 The upper right connecting cable 20 with its conductor 16 is fixed from the left side via the associated pressure screw 54 and then, after releasing the entry path or the receiving channel 46 for the upper left connecting cable 20, the fixing is carried out via the lower left pressure screw 54 to be fixed.

[0051] As can be further seen from Figure 4, the cuboid base bodies 40, 42 can be varied in their dimensions in such a way that several further mounts 15 can be arranged side by side in a linear arrangement within the clamping body 12.

[0052] In the basic design according to Figures 1 to 3 and 7 to 10, the wall thickness of the lateral wall boundaries 56 for the respective insertion receptacle 14, which transition into the two opposing, parallel boundary walls 24, is of the same design and preferably chosen to be so thin-walled that the width of the slot opening 28 for clamping operations can be easily adjusted by means of the clamping device 26.However, if the clamping body 12 is significantly wider than the previously described connection configuration, as shown in Figure 4, it is advantageous if, as shown in Figure 5, a further slot 58 in the form of a relief slot is provided parallel to the slot opening 28, which allows the wall thickness of the wall boundaries 56 to be explicitly defined in such a way that, preferably always with one and the same tightening torque applied via the clamping screw 32, a defined clamping force can be exerted for all clamping configurations.If there is insufficient space to install an additional relief slot 58, as illustrated by example in Figure 6, material weakening can also be achieved from the outside by removing material 60 in the circular arc shape shown by way of example, so that even with a reduced width of the existing slot opening 28, a clamping process can again be achieved with a defined, preferably the same, clamping force. It would also be conceivable to use a modified housing material 40rrp / 131950A / VO.

[0053] 15 in this area (not shown) a material weakening for the clamping body 12 within the desired range for a constant clamping force effect by means of the clamping screw 32, which is not shown in Figures 5 and 6 for the sake of simplicity.

[0054] The clamping device according to the invention achieves a kind of two-directionality, determined by the polyhedral shape of the clamping body 12 and no longer by a conductor contact. This allows for greater freedom in optimizing the electrical and mechanical conductor contact. Furthermore, due to the angular shape of the clamping body 12, the respective conductor 16, 18, 20, or receiving channel 46 can be extended so that the conductor 16 to be contacted lies completely beneath the contact area of ​​the pressure screw 54. This ensures that the pressure force is not applied to the conductor 16 across its entire clamping surface. Consequently, a requirement frequently imposed by customers that the conductor 16 must be cut at a 90-degree angle at its end is eliminated. The conductor channel or receiving channel 46 is thus also optimized with regard to the desired line contacts due to the groove design 49.

[0055] Because the bore in the form of the receptacles 14 in the clamping body 12 is deformed after the bolt-shaped transformer plug 18 or transformer bushing has been fully inserted by means of the clamping device 26, an electrically reliable contact is achieved over a considerable distance between the transformer plug 18 and the terminal 10 with its clamping body 12. The transformer plug 18 or the transformer bushing can also have an external thread (not shown), in which case the aforementioned electrically reliable contact is achieved via the inner wall of the bore and the adjacent threaded section of the transformer plug 18. In this respect, it is only necessary to ensure that 40rrp / 131950A / VO

[0056] 16 the free diameter, which is dimensioned larger than the (threaded) outer diameter of the transformer candle 18 taking into account a predefinable mounting clearance.

[0057] In contrast to known solutions where the clamping slot is formed transversely to a bore axis, thus limiting electrical contact to small deformed thread portions in the area of ​​the slot, the invention now places the slot opening 28 in the longitudinal axis of the respective bore or receptacle 14, or in the direction of both alternatively usable receptacles 14 with their associated bores. Nevertheless, the slotted plate associated with the groove or slot opening 28, formed by components of the clamping body 12, is designed to be so robust that a sufficiently rigid bending beam is created which cannot be plastically deformed in the described application. This creates a multitude of potential electrical contact points for current transfer along the entire clamped area of ​​the transformer candle 18.The slotted clamping screw, in the form of the clamping screw 32, engages far to the outside of the aforementioned bending beam in order to better utilize the resulting clamping effect. The free shank of the screw body 34, between the bearing surface of the screw head 34 on the associated boundary wall 24 and the screw receptacle 36 in the form of the internal thread in the clamping body 12, acts as an expansion screw when engaged, thus providing an elastic adjustment reserve for the pre-tensioned slotted clamp. The aforementioned bidirectional plug-in capability of the terminal block 10 creates a one-piece assembly that significantly reduces assembly time, as the clamping body 12 no longer needs to be screwed onto a transformer plug 18, but rather simply pushed onto it.Accordingly, replacing the pressure screws 54 to change the cable exit direction with the connecting cables 20 is not 40rrp / 131950A / VO.

[0058] 17 more are needed. Rather, as shown, only the terminal block 10 needs to be "tilted" after being pulled off and then put back on to achieve the desired repositioning.

[0059] Preferably, at least four transformer bushings with terminals 10 are arranged in a row on a transformer (not shown). Transformers are becoming increasingly smaller in size, which also reduces the spacing between the bushings. Previously, the so-called "wrap circle" was important for mounting, determined when screwing on each terminal to ensure sufficient space for side-by-side installation. With the pluggable solution presented here, only the terminal width is relevant, allowing for closer spacing between the bushings. Consequently, larger terminals with larger cable cross-sections or additional cables can be mounted on the transformer with the same bushing spacing as before.

[0060] The aforementioned pluggable design not only simplifies assembly but also disassembly of the terminal block 12. Previously, all conductors had to be disconnected before the terminal block could be unscrewed from the transformer socket 18. With the terminal block 10 presented here, however, the entire terminal block 12, along with any connected conductors 16 of the connecting cables 20, can be pulled off the respective transformer bushing. Furthermore, since only one central clamping screw 32 needs to be actuated or tightened, the otherwise necessary alternating tightening of at least two clamping screws, as required in known solutions, is eliminated. This has no equivalent in the prior art.

Claims

rrp / 131950A / VO 18 P a t e n t a n s p r ü c h e 1. A clamping device, in particular in the form of a terminal block (10) for a transformer, comprising a clamping body (12) having individual contact points in the form of receptacles (14, 15) for electrical conductors (16), such as transformer plugs (18) and connecting cables (20), which are at least partially embedded in boundary walls (22) arranged between two opposing boundary walls (24) of the clamping body (12), which are free of such receptacles (14, 15), characterized in that at least one receptacle (14) for inserting a conductor (16), such as a transformer plug (18), is provided in each of two adjacent boundary walls (22 a, b), and at least one further receptacle (15) for a further conductor (16) is provided in boundary walls (22 c, d, e, f) opposite these boundary walls (22 a, b) with the respective insertion receptacle (14). such as a connecting cable (20).

2. Clamping device according to claim 1, characterized in that the free diameter of the receptacles (14) for inserting a conductor (16), such as the transformer candle (18), can be changed by means of a clamping device (26) in the clamping body (12).

3. Clamping device according to claim 1 or 2, characterized in that the receptacles (14) with their variable diameters serve for the insertion, in particular the insertion of the respective conductor (16), in particular in the form of the transformer candle (18), which can be fixed in the respective assignable receptacle (14) by means of the clamping device (26) in a releasable manner.

4. Clamping device according to one of the preceding claims, characterized in that the adjacent insertion or insertion receptacles (14) open into a common slot opening (28) which extends through the clamping body (12) and has a connection to the outside and is penetrated by a clamping screw (32) in the clamping body (12) which, as part of the clamping device (26), varies the size of the slot opening (28).

5. Clamping device according to one of the preceding claims, characterized in that the wall thickness of the wall boundaries (56) of the respective insertion recess (14), which transition into the two mutually adjacent boundary walls (22), is the same and preferably thin-walled and / or that a further material weakening occurs in the clamping body (12) in addition to the slot opening (28), in particular in the form of at least one additionally arranged slot (58) and / or a material removal (60) on the clamping body (12).

6. Clamping device according to one of the preceding claims, characterized in that the further receiving devices (15) are grouped in pairs and each have a receiving channel (46) for inserting a further conductor (16), such as a connecting cable (20), and each have a fixing channel (48) for inserting a fixing means (50), such as a fixing screw, for fixing the further conductor (16) in the receiving channel (46) of this pair.

7. Clamping device according to one of the preceding claims, characterized in that the respective receiving channel (46) has a groove design (49) and the respective fixing channel (48) has an internal thread (52).

8. Clamping device according to one of the preceding claims, characterized in that the clamping body (12) is designed in the form of a polyhedron in an angular shape.

9. Clamping device according to one of the preceding claims, characterized in that the two opposing boundary walls (24) receive the slot opening (28) between them and are penetrated by the clamping device (26), that the two adjacent boundary walls (22 a, b) meet each other at right angles along an edge (30) between these two boundary walls (24), and that the respective insertion receptacle (14) for the respective conductor (16), such as a transformer candle (18), merge into each other at their ends at a predetermined angle, preferably perpendicular to each other.

10. Clamping device according to one of the preceding claims, characterized in that the boundary walls (22 c, d, e, f) with the further receptacles (15) are arranged at least partially at right angles to each other and offset from each other in such a way that at least four further receptacles (15) are created for receiving conductors (16) and / or fixing means (50), and that in each angled section of the polyhedron formed from the boundary surfaces (22, 24) at least two receptacles (15) for each further conductor (16), such as a receiving cable (20), point in the same direction.

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