Connector intended for the electrical connection of poles of a main power transmission cable to branch cables

Abstract

The invention relates to a connector (10) for the electrical connection of poles (101-104) of a main cable (100) for the transmission of electrical power to branch cables (110), said connector (10) comprising at least two connection sub-assemblies (1, 1'), respectively a first connection sub-assembly (1) and a second connection sub-assembly (1'), each of said connection sub-assemblies (1, 1') comprising: - a first clamping part (2a) and a second clamping part (2b) movable in translation relative to each other parallel to an axial direction (A), the approach of the first and second clamping parts (2a, 2b) relative to each other being achieved by means of at least one clamping screw (4), - a separator (5, 5') of insulating material disposed between the first and second clamping parts (2a, 2b),the poles (101-104) of the main cable (100) and the branch cables (110) being intended to be arranged between the clamping parts (2a, 2b) and the separator (5, 5'), - contact means (62) arranged to electrically connect the poles (101-104) of the main cable (100) to the branch cables (110) when the first and second clamping parts (2a, 2b) are brought together, the connector (10) further comprising connecting means (7, 55) intended to connect the first connection sub-assembly (1) and the second connection sub-assembly (1'), said connecting means (7, 55) being adapted to allow pivoting movement between said first and second connection sub-assemblies (1, 1') about a pivot axis (B) perpendicular to the axial direction (A). Figure 4,

Description

Title of the invention: Connector for the electrical connection of poles of a main power transmission cable to branch cables

[0001] The invention relates to a connector intended for the electrical connection of poles of a main electrical power transmission cable to derivative cables.

[0002] The invention relates more specifically to a branch connector for underground low voltage electrical cables, preferably multi-pole.

[0003] A connector of this type generally comprises a first clamping portion and a second clamping portion that are movable in translation relative to each other. The clamping portions are brought together relative to each other by means of at least one clamping screw. The clamping portions are separated from each other by means of one or more separators made of insulating material, the poles of the main cable and the branch cable being intended to be positioned between one of the clamping portions and a separator or between two separators. Each connector further comprises contact blades equipped with perforation teeth at the clamping portions and / or the separators, said teeth being arranged to electrically connect at least one of the poles of the main cable to the branch cable when the clamping portions are tightened.The clamping of the poles of the main cable and the secondary cable can be carried out simultaneously, or separate clamping means can be provided so as to clamp the poles of the main cable independently of the clamping of the secondary cable(s).

[0004] In the case of simultaneous tightening, the placement and securing of the poles or cables before tightening are delicate. It is necessary to coordinate the correct positioning of the four poles of the main cable and the additional branch cable(s) simultaneously before tightening.

[0005] State-of-the-art connectors allowing this simultaneous tightening have significant limitations that affect the reliability and performance of the connections.

[0006] One of the main difficulties lies in the imperfect penetration of the perforation teeth through the cable insulation. Indeed, current connectors are often designed for cables with poles of identical shape and size. However, in multicore cables, the poles can have varied geometries, notably with sector-shaped phases and smaller, circular neutrals. Furthermore, underground cables are manufactured with a helical structure, meaning that the poles wind in a helix, resulting in a variation in the apparent height of the poles along the cable. These combined factors can compromise the quality of electrical contact, some teeth failing to penetrate the conductors properly.

[0007] The proposed invention aims to overcome these drawbacks by introducing a connector capable of adapting to variations in cable helix and differences in pole shape and size.

[0008] To this end, the invention relates to a connector for the electrical connection of poles of a main power transmission cable to branch cables, said connector comprising at least two connection sub-assemblies, respectively a first connection sub-assembly and a second connection sub-assembly, each of said connection sub-assemblies comprising:

[0009] - a first clamping part and a second movable clamping part translation relative to each other parallel to an axial direction, the bringing together of the first and second clamping parts relative to each other being achieved by means of at least one clamping screw,

[0010] - a separator made of insulating material disposed between the first and second parts of clamping, the poles of the main cable and the branch cables being intended to be arranged between the clamping parts and the separator,

[0011] - contact means arranged to electrically connect the poles of the cable main to the cables derived during the coming together of the first and second clamping parts,

[0012] characterized in that the connector further comprises connecting means intended to link together the first connecting subset and the second connecting subset, said connecting means being capable of allowing pivoting movement between said first and second connecting subsets around a pivot axis perpendicular to the axial direction.

[0013] Thus configured, the connector according to the invention allows for finer adjustment to the actual geometry of the cables because it consists of two movable connection sub-assemblies rotating around a pivot axis. Each connection sub-assembly can therefore adopt a distinct inclination, which allows for optimal positioning of the contact means relative to the poles of the main cable, taking into account its helical shape. In particular, if the contact means have perforation teeth, it will be possible to orient the contact means so that the distance between the perforation teeth and the poles is as small as possible before the first and second clamping parts are brought together. Thus, during clamping, the teeth can penetrate sufficiently deep into each pole of the main cable to pass through the insulating sheath and reach the metallic conductive core.

[0014] According to other features, the connector according to the invention comprises one or more of the following optional features considered alone or in combination: - the connecting means include a connecting shaft aligned with the pivot axis, said connecting shaft comprising a first end fixed to the separator of one of the first and second connecting subsets and a second end pivotally connected to the separator of the other of the first and second connecting subsets. - each connection sub-assembly comprises a first contact block and a second contact block supporting the contact means, the first contact block being disposed between the first clamping part and the separator and the second contact block being disposed between the second clamping part and the separator. - the connector is of the four-pole type and, in each of the first and second connection sub-assemblies, two poles of the main cable are intended to be arranged between the first contact block and the separator and two other poles of the main cable are intended to be arranged between the second contact block and the separator, the associated derivative cables being intended to be arranged, respectively, between the first contact block and the first clamping part and between the second contact block and the second clamping part. - the first contact block, respectively the second contact block, is provided with two assembly plates extending parallel to the axial direction, said assembly plates being intended to connect said first clamping part, respectively said second clamping part, to the first contact block, respectively to the second contact block. - each assembly plate is provided with two parallel grooves on an inner face which is opposite an outer face of one of the clamping parts, said grooves having a shape complementary to two ribs formed on said outer face so as to allow a connection of said clamping part to one of the contact blocks when the ribs are housed in the grooves. - Each connecting subassembly comprises a spar extending parallel to the axial direction and having a first and a second end guided respectively in translation within a first opening formed in the first contact block and a second opening formed in the second contact block, each end of the spar comprising an impermeability stop preventing the exit of said end from the opening of the corresponding contact block. - the longeron is received in an opening made in the separator. - the spar of the first connecting sub-assembly and the spar of the second connecting sub-assembly are connected by a cross member extending perpendicularly to the axial direction, the cross member having a first section fixed to the spar of the first connecting sub-assembly and a second section fixed to the spar of the second connecting sub-assembly, said first and second sections being able to pivot relative to each other around an axis parallel to the pivot axis. - the crossbar includes elastic return means designed to separate the first and second clamping parts from each other. - the elastic return means are in the form of a first tube, respectively a second tube, made of elastic material, for example elastomer, arranged around the clamping screw of the first connection sub-assembly, respectively the second connection sub-assembly. - The contact means comprise contact blades housed in the first and second contact blocks, said contact blades having teeth capable of piercing the insulation sheaths of the cables and / or the corresponding poles

[0015] The invention will be better understood with the aid of the following description with reference to the attached figures representing, by way of non-limiting example, one embodiment of this connector.

[0016] [Fig-1] is a perspective view, in an assembled and tightened state, of a connector according to the invention.

[0017] [Fig.2] is an exploded perspective view of the connector of [Fig.1].

[0018] [Fig.3] is a front view of the connector of [Fig.1], before the installation of the main cable and branch cables.

[0019] [Fig.4] is a front view of the connector of [Fig.1], after the main cable and branch cables have been put in place.

[0020] [Fig.5] is an enlarged perspective view of the first clamping parts and the first contact blocks of the connector of [Fig.1] and after complete clamping of the connector.

[0021] [Fig.6] is an enlarged perspective view of the connection structure of the connector of [Fig.1].

[0022] [Fig.7] is an enlarged perspective view of the two separators of the connector of [Fig.1].

[0023] A four-pole connector 10 according to the invention is shown in Figures 1 to 4. This connector 10 is designed to connect several branch cables, such as the cables 110 shown in [Fig. 1], to a main electrical power distribution cable such as the cable 100 illustrated in [Fig. 1]. The main cable 100 has three phase poles 102, 103, 104 and one neutral pole 101.

[0024] The phase poles 102, 103, 104 have a sector-shaped profile, that is, an angular sector shape with a vertex angle of approximately 90°. The neutral pole 101 has a round profile with a smaller cross-section.

[0025] In cable 100, the phase poles 102-104 are arranged side-by-side so as to form an assembly having a sector profile extending overall over approximately 270° (three quarters of a round), the neutral pole 101 being arranged in the remaining quarter-round space.

[0026] Each of the poles 101-104 is formed of a conductive metallic core covered with an insulating sheath of plastic material.

[0027] In cable 100, poles 101-104 are wound in a helix. As explained previously, this helical arrangement generates a variation in the apparent height of the poles along the cable. Consequently, poles 101-104 have a variable orientation within connector 10, which can interfere with their electrical connection to the branch cables 110.

[0028] As shown in Figures 1 and 2, the connector 10 comprises a first and a second connection sub-assemblies 1, 1', said connection sub-assemblies being arranged contiguously along a longitudinal direction X. Each connection sub-assembly has the same structure. Each connection sub-assembly 1, 1' comprises a first and a second clamping parts 2a, 2b movable in translation relative to each other, the clamping parts being brought together relative to each other by means of a clamping screw 4. The clamping parts 2a, 2b are separated from each other by means of a separator 5 or 5' made of insulating material.Each connection sub-assembly 1,1' further comprises a first contact block 6a and a second contact block 6b supporting contact blades 62 having, at their lower and upper ends, teeth suitable for piercing the insulation sheaths of the poles of the main cable and the branch cables, the first contact block 6a being disposed between the first clamping part 2a and the separator 5 or 5' and the second contact block 6b being disposed between the second clamping part 2b and the separator 5 or 5'.

[0029] The first and second clamping parts 2a, 2b, respectively the first and second contact blocks 6a, 6b, have a similar structure. Only their arrangement in the connector 10 is reversed. Therefore, the explanations provided in the following paragraphs with reference to [Fig.5] therefore apply by analogy to the second clamping part 2b and the second contact block 6b.

[0030] As shown in [Fig. 5], the contact block 6a comprises a substantially flat base 61, in which a series of slots 65 are provided for housing, at least in part, the contact blades 62. The contact blades 62 are configured such that, once mounted in the base 61, their upper ends protrude from an upper face 611 of the base 61 towards the first clamping portion 2a and their lower ends protrude from a lower face 612 of the base 61 towards the separator 5. The contact block 6a is further provided with two mounting plates 63 extending parallel to an axial direction A. Each mounting plate 63 is provided with two parallel grooves 633 on an inner face 632 facing the clamping portion 2a.

[0031] The clamping part 2a has, in side view, a general trapezoidal shape comprising two external faces 21, extending substantially parallel to the axial direction A and spaced apart from each other in the longitudinal direction X. Each external face 21 has two ribs 23. These ribs 23 are intended to fit into the grooves 633 of the assembly plate 63 which is arranged opposite said external face 21, so that a sliding connection between the clamping part 2a and the contact block 6a is ensured by means of the two assembly plates 63 of the contact block 6a.

[0032] The clamping part 2a further has a central hole 22 centered on the axis A and intended for the passage of a nut 35 into which the clamping screw 4 is screwed. In an embodiment, this central hole 22 may have a general conical shape flaring out towards the upper face 24 of the clamping part 2a, so as to allow an angular movement of the clamping part 2a with respect to the screw 4, around the axis A.

[0033] As shown in [Fig. 2], the clamping screw 4 has a head 43 and a body 44, the free end of which is threaded and screwed into the nut 35. The head 43 has a generally square area 46, inserted into a correspondingly shaped recess in the second clamping portion 2b. In this way, the screw 4 is prevented from rotating relative to the second clamping portion 2b. The head 43 of the screw 4 is further covered by a protective plate 48, which is fixed to the second clamping portion 2b. The nut 35 is pivotally mounted in the first clamping portion 2a. Several metal thrust washers 39 are arranged between the nut 35 and the upper face 24 of the first clamping portion 2a. The nut 35 is surmounted by an actuating head 30 having a zone 31 in contact with the nut 35 so as to drive it and an actuating zone 32, intended to be actuated by an operator by means of a key.The actuation zone 32 and the zone of . The two sockets 31 are separated from each other by a smaller diameter zone 33, the dimensions of which are adjusted to form a breakable zone when the tightening torque exceeds a predetermined value. Thus, during tightening, the actuation zone 32 is separated from the socket zone 31, ensuring proper tightening of the connector. The socket zone 31 may include a serrated peripheral area, allowing, if necessary, the loosening of the screw 4 - nut 35 system using pliers. The socket zone 31 is arranged so that it is positioned on top during assembly, to facilitate connection operations for the operator.

[0034] As shown in Figures 2 and 7, the separator 5 of the first connecting sub-assembly 1, and respectively the separator 5' of the second connecting sub-assembly 1', comprise a first plate-shaped portion 51, 51', and 56 having a plurality of transverse grooves or ribs 56 on each of its walls, hereinafter referred to as lower and upper for convenience. Each separator 5, 5' further comprises a second portion 52, 52' intended to partially overlap the first portion 51, 51' so as to define a thicker area 57, as illustrated in [Fig. 3]. The first part 51, 51' is provided with a central hole 58, intended for the passage of the screw 4, and comprises an annular shape provided with an opening 54, along an external transverse edge 59 which is perpendicular to the longitudinal direction X. The opening 54 has a U-shaped profile.

[0035] The separators 5 and 5' are connected together by means of a connecting shaft 55. In the embodiment shown, the connecting shaft 55 is fixed to the separator 5' at one of its ends and extends from an internal transverse edge 59' of the first part 51' towards the other separator 5. Its other end is pivotally received in a bearing 53 protruding from the internal transverse edge 59' of the first part 51. Thus configured, the connecting shaft 55 will allow the parts 51 and 51' to pivot relative to each other about a pivot axis B, which is perpendicular to the axes A and A'. As explained later, this pivoting will allow the second connection subset 1' to be moved angularly relative to the first connection subset 1, such that their respective axes A and A' form an angle 0, as illustrated in [Fig.4].

[0036] As shown in Figures 1, 2 and 6, the connector 10 includes a connecting structure 7 for connecting together the first and second contact blocks 6a, 6b and the separators 5, 5' of the connection subassemblies 1, 1'. This connecting structure 7 includes a first spar 71 extending in a direction Al parallel to the axis A and a second spar 71' extending parallel to a direction A2 parallel to the axis A', said spars 71, 71' being connected by a cross member 72 extending perpendicularly to the directions Al and A2.

[0037] The first longitudinal member 71 has a U-shaped cross-section and is slidably received in the opening 54 of the separator 5. It further has a first end 71a which is slidably received in an opening 64 (visible in [Fig. 1]) provided in the base 61 of the first contact block 6a of the first connection sub-assembly 1 and a second end 71b which is slidably received in an opening 64 provided in the base 61 of the second contact block 6b of the first connection sub-assembly 1, said openings 64 having the same U-shaped profile as the opening 54. Each of the ends 71a, 71b of the longitudinal member 71 has a locking stop 74 preventing said end from exiting the opening 64 of the corresponding contact block.

[0038] Similarly, the second longitudinal member 71' has a U-shaped cross-section and is slidably received in the opening 54 of the separator 5'. It further has a first end 71a' which is slidably received in an opening 64 (visible in [Fig. 1]) formed in the base 61 of the first contact block 6a of the second connecting sub-assembly 1' and a second end 71b' which is slidably received in an opening 64 formed in the base 61 of the second contact block 6b of the second connecting sub-assembly 1', said openings 64 having the same U-shaped profile as the opening 54. Each of the ends 71a', 71b' of the longitudinal member 71' has a locking stop 74' preventing said end from protruding from the opening 64 of the corresponding contact block.

[0039] The cross member 72 comprises a first section 721 attached to the first longitudinal member 71 and a second section 722 attached to the second longitudinal member 71'. The first and second sections 721, 722 are connected together at their free ends, such that they can pivot relative to each other about an axis B' which is parallel to the pivot axis B. This pivoting connection between the two sections 721, 722 can be achieved by any means conceivable by those skilled in the art. In particular, as shown in [Fig. 6], this pivoting connection can be obtained by equipping one of the sections 721, 722 with a connecting rod 75, said connecting rod 75 being slidably received in a ring 76 supported by the other section 721, 722.

[0040] Each section 721, 722 further incorporates an elastomer tube 73 intended to surround the screw 4 of one of the connection sub-assemblies 1, 1', the tube 73 being disposed between the first contact block 6a and the separator 5, 5'. The tubes 73 will act as return means and will tend to separate the first and second clamping parts 2a, 2b from each other.

[0041] The operation of connector 10 will now be described in more detail with reference to figures 3 and 4.

[0042] In the position shown in [Fig. 3], the connector 10 is in a so-called pre-assembly position, before the main cable 100 and the branch cables 110 are installed. This position is characterized by a significant axial gap between, respectively, the first clamping portion 2a and the first contact block 6a, the first contact block 6a and the separator 5, 5', the separator 5, 5' and the second contact block 6b, and the second contact block 6b and the second clamping portion 2b. This significant gap will thus facilitate the installation of the poles of the main cable 100 and the branch cables 110. It should also be noted that, in this position, the axes A and A' of the clamping screws 4 of each connection sub-assembly 1, 1' are parallel to each other.

[0043] In the position shown in [Fig.4], the connector 10 is in its mounted position, after the main cable 100 and the branch cables 110 have been put in place and after the screws 4 have been tightened. This position is obtained by first positioning the poles 101 and 102 of the main cable 100 between the contact blocks 6a and the separators 5, 5' and the poles 103 and 104 of the main cable 100 between the contact blocks 6b and the separators 5, 5', and, subsequently, by positioning two branch cables 110 between the contact blocks 6a and the clamping parts 2a and two other branch cables 110 between the contact blocks 6b and the clamping parts 2b. Once this step has been completed, the operator can tighten each connection sub-assembly 1, 1' via the corresponding screw 4 - nut 35 systems, more particularly via the actuation area 32.During a preliminary tightening phase, the clamping parts 2a and 2b will first approach the contact blocks 6a and 6b respectively, thus pressing the derivative cables 110 against the upper teeth of the contact blades 62. This preliminary phase will therefore cause the contact blades 62 to pierce the insulation sheaths of the derivative cables 110. During an intermediate tightening phase, the clamping parts 2a and 2b exert a downward and upward force respectively on the contact blocks 6a and 6b, via the derivative cables 110. This force breaks a hard point that held the contact blocks 6a and 6b in position along the longitudinal members 71 or 71'. Thus, during a final tightening phase, the contact blocks 6a and 6b will approach the separators 5 or 5', thus pressing the lower teeth of the contact blades 62 against the poles 101 to 104 of the main cable 100.This final phase will therefore cause the contact blades 62 to pierce the insulation sheaths of poles 101 to 104. The use of two separate connection sub-assemblies 1, 1' allows the first sub-assembly 1 to be tightened first, then the second sub-assembly 1', so that the number of poles to be held in position during each tightening is limited, which facilitates the implementation of the electrical connection. Furthermore, since the main cable 100 has a helical structure, poles 101 to 104 have, before tightening, an orientation in the connection sub-assembly 1' that is different from . that in the connection sub-assembly 1. Consequently, when the screws 4 are tightened, a pivoting between the two connection sub-assemblies 1,1' around the pivot axis B will occur naturally due to their pivoting connection, such that the axes A and A' of their screws 4 ultimately form an angle 0, the angle 0 being configured to optimally orient the poles 101 to 104 relative to the contact blades 62. In particular, the angular offset between the two connection sub-assemblies 1,1' will allow the distance between the perforation teeth and the poles to be reduced as much as possible before the first and second clamping parts 2a, 2b are brought together. Thus, during tightening, the teeth will penetrate sufficiently deep into the insulating sheath of the poles to reach the metallic conductive core.

[0044] It goes without saying that the invention is not limited to the embodiment described above by way of example, but on the contrary embraces all conceivable variants.

Claims

Demands

1. Connector (10) for the electrical connection of poles (101-104) of a main power transmission cable (100) to branch cables (110), said connector (10) comprising at least two connection sub-assemblies (1, 1'), respectively a first connection sub-assembly (1) and a second connection sub-assembly (1'), each of said connection sub-assemblies (1, 1') comprising: - a first clamping part (2a) and a second clamping part (2b) movable in translation relative to each other parallel to an axial direction (A), the approach of the first and second clamping parts (2a, 2b) relative to each other being achieved by means of at least one clamping screw (4), - a separator (5, 5') of insulating material disposed between the first and second clamping parts (2a, 2b),the poles (101-104) of the main cable (100) and the branch cables (110) being intended to be arranged between the clamping parts (2a, 2b) and the separator (5, 5'), - contact means (62) arranged to electrically connect the poles (101-104) of the main cable (100) to the branch cables (110) when the first and second clamping parts (2a, 2b) are brought together, characterized in that the connector (10) further comprises connecting means (7, 55) intended to connect the first connection sub-assembly (1) and the second connection sub-assembly (1'), said connecting means (7, 55) being capable of allowing pivoting movement between said first and second connection sub-assemblies (1, 1') about a pivot axis (B) perpendicular to the axial direction (A).

2. Connector (10) according to claim 1, characterized in that the connecting means comprise a connecting shaft (55) aligned with the pivot axis (B), said connecting shaft (55) comprising a first end fixed to the separator (5') of one of the first and second connecting sub-assemblies (1, 1') and a second end pivotally connected to the separator (5) of the other of the first and second connecting sub-assemblies (1, 1').

3. Connector (10) according to claim 1 or 2, characterized in that each connection sub-assembly (1, 1') comprises a first contact block (6a) and a second contact block (6b) supporting the contact means (62), the first contact block (6a) being disposed between the first clamping part (2a) and the separator (5, 5') and the second contact block (6b) being disposed between the second clamping part (2b) and the separator (5, 5').

4. Connector (10) according to claim 3, characterized in that it is of the four-pole type and in that, in each of the first and second connection sub-assemblies (1, 1'), two poles (101, 102) of the main cable (100) are intended to be arranged between the first contact block (6a) and the separator (5, 5') and two other poles (103, 104) of the main cable (100) are intended to be arranged between the second contact block (6b) and the separator (5, 5'), the associated derivative cables (110) being intended to be arranged, respectively, between the first contact block (6a) and the first clamping part (2a) and between the second contact block (6b) and the second clamping part (2b).

5. Connector (10) according to claim 3 or 4, characterized in that the first contact block (6a), respectively the second contact block (6b), is provided with two assembly plates (63) extending parallel to the axial direction (A), said assembly plates (63) being intended to connect in a sliding manner said first clamping part (2a), respectively said second clamping part (2b), to the first contact block (6a), respectively to the second contact block (6b).

6. Connector (10) according to claim 5, characterized in that each assembly plate (63) is provided with two parallel grooves (633) on an inner face (632) which is opposite an outer face (21) of one of the clamping parts (2a, 2b), said grooves (633) having a shape complementary to two ribs (23) formed on said outer face (21) so as to allow a connection of said clamping part (2a, 2b) on one of the contact blocks (6a, 6b) when the ribs (23) are housed in the grooves (633).

7. Connector (10) according to any one of claims 3 to 6, characterized in that each connecting sub-assembly (1, 1') comprises a spar (71,71') extending parallel to the axial direction (A) and having a first and a second end (71a, 71b; 71a', 71b') guided respectively in translation in a first opening (64) made in the first contact block (6a) and a second opening (64) made in the second contact block (6b), each end (71a, 71b; 71a', 71b') of the spar (71, 71') having an impermeability stop (74, 74') preventing the exit of said end (71a, 71b; 71a', 71b') out of the opening (64) of the corresponding contact block (6a, 6b).

8. Connector (10) according to claim 7, characterized in that the stringer (71, 71') is received in an opening (54) provided in the separator (5, 5').

9. Connector (10) according to claim 7 or 8, characterized in that the spar (71) of the first connecting sub-assembly (1) and the spar (71') of the second connecting sub-assembly (1') are connected by a cross member (72) extending perpendicularly to the axial direction (A), the cross member (72) comprising a first section (721) integral with the spar (71) of the first connecting sub-assembly (1) and a second section (722) integral with the spar (71') of the second connecting sub-assembly (1'), said first and second sections (721, 722) being able to pivot relative to each other about an axis (B') parallel to the pivot axis (B).

10. Connector (10) according to claim 9, characterized in that the cross member (72) has elastic return means (73) intended to separate the first and second clamping parts (2a, 2b) from each other.

11. Connector (10) according to claim 10, characterized in that the elastic return means are in the form of a first tube (73), respectively of a second tube (73), made of elastic material, for example of elastomer, arranged around the clamping screw (4) of the first connection sub-assembly (1), respectively of the second connection sub-assembly (1').

12. Connector (10) according to any one of claims 3 to 11, characterized in that the contact means comprise contact blades (62) housed in the first and second contact blocks (6a, 6b), said contact blades (62) having teeth suitable for piercing insulation sheaths of the cables (110) and / or the corresponding poles (101-104).

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