FR2981213A1 - Electric connection device for feeding row of modular electrical devices in electrical box, has cover including cutouts for authorizing access to electrical connection pins of certain conductive bars while preventing access to other bars - Google Patents

Abstract

The device (100) has modular assemblies (10), each including a conductive bar (11) provided with electrical connection pins (111), and an insulating element (13) having a front wall (14) with access openings (15) to the electrical connection pins. The conductive bars include the same number of electrical connection pins, and a cover (50) covers the front walls of the insulating elements. The cover includes cutouts (52) authorizing access to electrical connection pins of certain conductive bars while preventing access to the other conductive bars.

Description

TECHNICAL FIELD TO WHICH THE INVENTION RELATES The present invention relates to an electrical connection device for supplying at least one row of modular electrical equipment. It relates more particularly to such a device comprising at least two modular assemblies each comprising, on the one hand, a conductive bar provided with a plurality of electrical connection tabs, and, on the other hand, an insulating element having a front wall provided with access openings to said electrical connection tabs. The invention finds a particularly advantageous application for the production of a horizontal distributor intended to be arranged in an electrical box. BACKGROUND OF THE INVENTION Document FR2936367 is already known such a connecting device, in which modular assemblies are assembled to each other to form a connecting device. Other known connection devices require the assembly of modular assemblies having different characteristics, especially in terms of the number of connection tabs of the busbars. It is therefore necessary to manufacture and assemble many different parts to produce them. OBJECT OF THE INVENTION In order to overcome the above-mentioned drawback of the state of the art, the present invention proposes a new type of connection device, the use of which is simplified and which can be manufactured from a limited number of rooms. More particularly, according to the invention, there is provided a connection device in which said busbars comprise an identical number of electrical connection tabs and in which there is provided a cover, made in one piece, which covers the front walls of said connectors. insulating elements and which includes cutouts allowing access to certain electrical connection tabs of one of said busbars which it prohibits access to the other busbar.

Other advantageous and non-limiting features of the device according to the invention are the following: the cover comprises, opposite the access openings of at least one of said modular assemblies, a plurality of first cutouts arranged to release one of two access ports of this modular assembly; - Each first cut releases a single access opening of the modular assembly; each first cut has a circular shape; Said first modular assembly comprises a conductive bar intended to be connected to a phase current; the cover comprises, opposite the access openings of at least one second of said modular assemblies, a plurality of second cutouts arranged so as to release all the access openings of this modular assembly; each second cut frees at least two successive access openings of the modular assembly; each second cut has an elongated shape; said second modular assembly comprises the conductive bar intended to be connected to the neutral current; each modular assembly comprises a spring blade associated with each connecting lug whose access is authorized by the hood and does not have a spring blade for the connection lugs whose access is prohibited by the hood; a base is provided inside which said modular assemblies are arranged and on which said cover is mounted; said cover comprises clipping lugs adapted to cooperate with receiving means of the base for its mounting thereon; said clipping tabs and said receiving means are arranged so that, when the hood is mounted on the base, at least part of the clipping tabs is concealed; - The cover is mounted manually unmountable on the base; - The cover has on its front face visible from the outside indicators indicating the electrical characteristics of the modular assemblies arranged under the hood. DETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT The following description with reference to the accompanying drawings, given as non-limiting examples, will make it clear what the invention consists of and how it can be achieved. In the accompanying drawings: - Figure 1 is an exploded view of the connecting device according to the invention - Figure 2 is an assembled view of the connecting device of Figure 1 - Figure 3 is a perspective view of the hood FIG. 4 is an enlarged view of a part of the base of the connecting device of FIG. 1; FIG. 5 is an enlarged view of the zone A of FIG. 1, and FIG. FIG. 6 is an enlarged view of the zone B of FIG. 1; FIG. 7 is an exploded view of a modular assembly of the device of FIG. 1, with a connecting arm devoid of a screw terminal. In Figures 1 and 2, there is shown the electrical connection device 100 according to the invention. This electrical connection device 100 is intended to supply at least one row of modular electrical equipment (not shown), for example in an electrical box accommodating such rows of modular electrical equipment.

The positioning and mounting of this connection device 100 in the electrical box will be explained later. The connection device 100 according to the invention comprises at least two modular assemblies 10 each comprising, on the one hand, a conductive bar 11 provided with a plurality of electrical connection tabs 111 (FIGS. 1, 5, 6 and 7) and on the other hand, an insulating element 13 having a front wall 14 provided with access openings 15 to said electrical connection lugs 111 (FIGS. 1, 5, 6 and 7). More specifically, in the example shown in the figures, the connection device 100 comprises four modular assemblies 10 (Figure 1).

Each conductive bar 11 is in the form of a comb of electrically conductive material, comprising a plate 112 (Figures 1, 6 and 7) of elongate shape along a longitudinal axis X and said electrical connection lugs 111 which extend transversely from this wafer 112 (see more particularly Figures 1, 5 and 7). The wafer 112 has two main faces connected by a side face corresponding to the edge of the wafer 112. The electrical connection lugs 111 extend from this side face, along one side of the wafer 112 called in FIG. following the front slice of the wafer.

Said electrical connection lugs 111 are distributed at regular intervals along the wafer 112. Each electrical connection lug 111 has a straight portion 113 which extends in the plane of the wafer 112 and a bent portion 114 which extends into a plane perpendicular to the plane of this plate 112 (Figure 7).

Each electrical connection lug 111 is preferably obtained in one piece with the wafer 112, by cutting and folding a portion of the wafer 112. All the bent portions 114 of the electrical connection lugs 111 extend towards the the same main face of the wafer 112.

The insulating element 13 is made in one piece in an electrically insulating material, for example plastic material. It is more particularly shown in Figures 5, 6 and 7. It comprises mounting means which will not be described in more detail here and which allow its attachment to the conductive bar 11.

The insulating element 13 at least partially covers the conductive bar 11, in an adjusted manner. Here, it completely covers the face of the conductive bar 11 on the side of which the bent portions 114 of the connecting lugs 111 protrude. The insulating element 13 here comprises two parts: an upper portion 131 which partially overlaps the electrical connection lugs 111 (Figures 5 to 7) and a lower portion 132 which partially overlaps the wafer 112 (Figures 6 and 7). More specifically, the upper portion 131 of the insulating member 13 is in the form of a generally parallelepipedal housing, comprising two longitudinal walls 18, 19 which extend parallel to the plane of the wafer 112 of the conducting bar 11, said front wall 14 and a rear wall 17 opposite to said front wall 14 (Figures 6 and 7). The front 14 and rear 17 walls extend perpendicularly to the longitudinal walls 18 and 19. One of the longitudinal walls 18 of the upper part 131 of the insulating element 13 has notches 181 which are partially closed by the conductive bar 11 ( see especially Figures 6 and 7). Indeed, as shown in FIG. 6, when the insulating element 13 is mounted on the conductive bar 11 to form the modular element 10, this longitudinal wall 18 of the upper part 131 of the insulating element 13 is located in the plane of the wafer 112 of the conducting bar 11, and the straight portions 113 of the electrical connection lugs 111 partially block the notches 181 of this longitudinal wall 18.

The curved portions 114 of the electrical connection lugs 111 are then housed inside the upper part 131 of the insulating element 13. The upper part 131 of the insulating element 13 extends approximately over the height of the connection lugs. 111. It thus covers the face of the electrical connection lugs 111 on the side of which the curved portion 114 of the electrical connection lugs 111 is folded. The front wall 14 of the insulating element 13 covers the portion of the edge of the electrical connection lugs 111 located opposite the wafer 112. Inside the upper part 131 of the insulating element 13, partitions support 20 (Figures 5 to 7) extend from the other longitudinal wall 19, perpendicularly thereto, towards the notches 181 of the longitudinal wall 18 opposite. These support partitions 20 are arranged close to the bent portion 114 of each electrical connection lug 111, and are adapted to each receive a spring blade 12 (FIGS. 5 to 7) associated with the electrical connection lug 111 of the conductive bar 11. corresponding to this curved portion 114. The leaf spring 12 forms a loop wound around the support partition 20, with a first leg 121 pressed against the bent portion 114 of the electrical connection lug 111, and a second leg 122 which extends above the bent portion 114 of the electrical connection lug 111 and has at its free end an orifice adapted to receive the stripped core of an electrical conductor for its electrical connection to said busbar 11 (Figures 5-7). The spring blade 12 and the electrical connecting lug 111 with which it is associated form an electrical connector of the modular assembly 10. The access openings 15 of the front wall 14 of the insulating element 13 allow the passage of the electrical conductor through the insulating element 13. They present here a circular shape. When the leaf spring 12 is inserted into the insulating member 13, the orifice 10 of the second leg 122 is disposed facing one of these access openings 15 of the front wall 14. The front wall 14 comprises in furthermore, near each access opening 15, an auxiliary opening 151 for the disconnection of the electrical conductor inserted into the spring blade 12. Each auxiliary opening 151 is arranged facing the loop of the spring blade 12, in such a way a tool inserted in this auxiliary opening 151 presses on this loop and moves said second branch 122 of the spring blade 12 so as to release the electrical conductor. The lower part 132 of the insulating element 13 comprises a flange 132A 20 extending from the rear wall 17 of the upper part 131 of the insulating element 13, parallel to the wafer 112 of the conducting bar 11, along of it (Figures 6 and 7). The lower part 132 of the insulating element 13 further comprises, along the free edge of the flange 132A, a return 132B (FIGS. 6 and 7) which covers the edge 25 of the wafer 112. The wing 132A and the 132B are arranged, with a close game, against the wafer 112 of the conducting bar 11. The lower part 132 of the insulating element 13 thus covers one of the main faces of the wafer 112, as well as the rear edge of the The four modular assemblies 10 provided here allow the realization of a four-pole connection device 100. Three of the modular assemblies 10 are thus intended to carry a phase current while the fourth modular assembly 10 is intended to convey a neutral current.

The four modular assemblies 10 used and shown in FIG. 1 are identical with the exception of the distribution of the leaf springs 12 in the insulating elements 13. In particular, the number of electrical connection lugs 111 carried by each conducting bar 11 is The only difference between these modular assemblies 10 lies in the distribution of the leaf springs 12 in these modular assemblies 10. In the three modular assemblies 10 for conveying a phase current, an electrical connection lug 111 of the conductive bar 11 on two is associated with a spring blade 12, while in the modular assembly 10 for conveying the neutral current, all the electrical connection lugs 111 of the conductive bar 11 are associated with a blade spring 12 (see Figure 6). It is thus possible to limit the number of leaf springs 12 of the connecting device 100, which is economically advantageous. Alternatively, it could be envisaged that all the modular assemblies are perfectly identical, with the same number of spring blades, and that some remain unused in the modular assemblies carrying a phase current. The conductive bar 11 of each modular assembly 10 is further connected at one of its longitudinal ends to a connecting arm 30, 31, 32, 33. This connecting arm 30, 31, 32, 33 extends here in a plane parallel to that of the wafer 112 of the conductive bar 11 and has a bent shape, such that this connecting arm 30, 31, 32, 33 is electrically connected at one of its ends to the wafer 112 and carries at its other end, at the same level as the electrical connection lugs 111 of the busbar 11, a screw terminal 301, 311, 321, 331 for connecting this busbar 11 to the electrical network. The connecting arms 30, 31, 32, 33 have different lengths, so that the screw terminals 301, 311, 321, 331 located at the free end of these connecting arms 30, 31, 32, 33 each open at a different distance from the longitudinal end of the corresponding conductive bar 11. Thus, the four modular elements 10 provided with their connecting arm 30, 31, 32, 33 can be joined to each other without the screw terminals 301, 311, 321, 331 interfering with each other. For this purpose, and so as to limit as much as possible the dimensions of the connecting device 100, the difference in length between the connecting arms 5 of two modular assemblies intended to be placed next to each other is equal to the width of the screw terminal. As shown in FIGS. 1 and 5, the connecting arms 30, 31, 32, 33 connected to the modular assemblies 10 preferably carry a mark indicating the nature of the current conveyed by the conducting bar 11 connected to this connecting arm. The markers L1, L2, L3 indicate the routing of a phase current while the mark N indicates the routing of a neutral current. Figures 5 and 6 each show a detail of two modular assemblies, one for conveying the phase current and the other for conveying the neutral current. Figure 7 is an exploded view of a modular assembly carrying the phase current, provided with its connecting arm. The connection device 100 according to the invention also comprises an insulating base 40 adapted to receive said modular assemblies 10 as well as the connecting arms 30, 31, 32, 33. The insulating base 40 is more particularly shown in FIGS. 4. It has a generally parallelepipedal shape, with a bottom from which rise two longitudinal lateral wings 41 parallel. The insulating base 40 is closed at one of its longitudinal ends by an end wall 42 perpendicular to the longitudinal lateral flanges 41. The bottom of the insulating base 40, a portion of the longitudinal flanges 41 and the end wall 42 form a first compartment 401 of the insulating base 40, adapted to receive the modular assemblies 10 contiguous to each other. The modular assemblies 10 are arranged in the first compartment 401 of the insulating base 40 so that the main faces of the wafer 112 of each conducting bar 11 are parallel to the longitudinal side walls 41 of this insulating base 40. The other end longitudinal of the insulating base 40 has a more complex shape, in staircase, and forms with a portion of the longitudinal side wings 41 a second compartment 402 of the insulating base 40, adapted to receive the connecting arms 30, 31, 32, 33 connected to the sets Modular 10. As explained in detail above, the insulating element 13 covers one face of the conductive bar 11 of each modular assembly 10, so as to be interposed between the conductive bars 11 of two adjacent modular assemblies 10 in the base 40. Consequently, there is no provision for an insulating separating partition between the modular assemblies 10 in the first compartment 401 of the base On the other hand, the second compartment 402 which accommodates the connecting arms 30, 31, 32, 33 comprises three partitions 403 intended to electrically isolate the connection arms with their screw terminal from one another. For this purpose, each partition 403 has a portion extending parallel to the longitudinal side wings 41 of the insulating base 40, intended to separate the connecting arms over their entire length from their end connected to the busbar 11 to the terminal to screw, and a portion extending perpendicularly to the longitudinal side wings 41 of the insulating base 40, for isolating the screw terminals 301, 311, 321, 331 from each other (Figure 4). At the second compartment 402, the shape of the insulating base 40 follows the geometry of the connecting arms provided with their screw terminal, in order to limit the bulk of the connection device 100 to the maximum (FIG. 4). The longitudinal walls 404 of this second compartment 402, which are in the extension of the longitudinal side wings 41 of the base 40 have access orifices 405 to the screw terminals 301, 311, 321, 331 (Figure 4). Remarkably, the connecting device 100 further comprises a cover 50, made in one piece, which covers the front walls 14 of said insulating elements 13 and which has cutouts 51, 52 allowing access to certain legs of electrical connection 111 of one of said busbars 11 which it prohibits access for the other busbars 11. 30 The cover 50 is shown in Figures 1, 2 and 3. It is in the form of a plate 53 which the dimensions and shape are adapted to close the opening of the insulating base 40. It is made in one piece, for example by molding a plastic material.

This plate 53 has an elongated rectangular shape, with at one of its longitudinal ends, a cut-out shape adapted to cover the second compartment 402 of the insulating base 40 which accommodates the connecting arms 30, 31, 32, 33 connected to the modular assemblies 10.

A front face 531 of the plate 53 is oriented towards the user when the cover 50 closes the insulating base 40, while a rear face 532 is then oriented towards the inside of the insulating base 40 (FIG. 3). The front face 531 of the plate 53, visible in FIGS. 1 to 3, comprises indicators 533 indicating the electrical characteristics of the modular assemblies 10 arranged under the cover 50. More specifically, the front face 531 of the cover 50 has lines illustrating the location of each modular assembly 10 under the cover 50 and, in correspondence with these lines, said indicators 533 which indicate the nature of the current carried by each modular assembly 10. Here the indicators 533 are the signs "L1", "L2", "L3" for the three modular assemblies 10 for conveying a phase current and the "N" sign for the modular assembly for conveying the neutral current. These indicators 533 are furthermore placed near an opening 534 of the cover plate 53 giving access to the screws of the screw terminals 301, 311, 321, 331 of the modular assemblies 10 (FIGS. 2 and 3). The installer's registration work is thus facilitated. As shown in Figure 3, the cutouts 51, 52 of the cover 50 are through. These cutouts 51, 52 are arranged opposite some of the access openings 15 of each modular assembly 10. More specifically, as shown in FIGS. 2 and 3, along the portion of the cover 50 covering the three modular assemblies 10 conveying the phase current, the plate 53 comprises a plurality of first cutouts 51 each providing a passage to a single access opening 15 of one of these three modular assemblies 10. Each first cut 51 has a shape for this purpose. circular. This circular shape as well as the dimensions of the first cutouts 51 are adjusted to the shape and dimensions of the access openings 15 of the modular assemblies 10. The first cuts 51 thus allow access to an access opening 15 on two of each of these three modular assemblies 10. The cover 50 closes the other access openings 15 of these three modular assemblies 10, prohibiting the introduction of an electrical conductor 5 in the space provided for disposing a spring blade therein possible. Advantageously, each modular assembly 10 comprises a spring blade 12 associated with each electrical connection lug 111 whose access is authorized by the cover 50 and is devoid of leaf spring 12 for the electrical connection lugs 111 whose access is prohibited by Thus, the electrical connection lugs 111 of the conductive bar 11 corresponding to the access openings 15 released by the blanks 51 of the cover 50 are associated with a spring blade 12 while the electrical connection lugs 111 of the conductive bar 11 corresponding to the access openings 15 closed by the cover 50 are free of leaf spring 12 (Figure 1 and 6). The number of spring blades is thus limited. Here, two successive access openings 15 of one of these three modular assemblies 10 are alternately released by a cutout 51 of the cover 50 and closed by this cover 50. Along the part of the cover 50 covering the modular assembly 10 20 conveying the neutral current, the cover 50 has second cutouts 52 whose arrangement is different. The second cutouts 52 open facing this modular assembly 10 conveying the neutral current indeed allow access to all the access openings 15 of this modular assembly 10.

The second cutouts 52 thus allow access to all the access openings 15 of this modular assembly 10 which correspond to the access openings 15 closed by the cover 50 for the other modular assemblies 10 of the electrical connection device 100. More precisely each second cut 52 of the cover 50 has here an elongated, preferably oblong, shape which frees two successive access openings 15 of the modular assembly 10 concerned. This arrangement has the advantage of making visible a part of the front wall 14 of the insulating element 13 of the modular assembly 10 conveying the neutral current, which is between the two successive access openings 15 released by the blank 52. On the other hand, the first cutouts 51 which give access to the access openings 15 of the modular assemblies 10 carrying the phase currents being fitted around the access openings 15, the color of the insulating element 13 of these modular assemblies 10 it will not be visible through the cover 50. An insulating element 13 having a color different from the front face of the cover 50 is preferably used. In practice, the color of the insulating element 13 is a blue color, usually used to designate the elements 10 carrying a current of neutral. The color of the insulating element 13 of the modular assembly 10 conveying the neutral current will therefore be visible from the outside, while it will be completely masked by the cover 50 for the other modular assemblies 10. 15 It is thus possible to use insulating elements 13 strictly identical to make all the modular assemblies 10 of the connecting device. Only the color of the insulating element 13 of the modular assembly 10 conveying the neutral current will be visible. This simplifies the manufacture and assembly of the modular assemblies 10, which are all identical to the number of spring blades close. The signage indicating to the installer which modular assembly conveys the neutral current is thus preserved despite the use of the cover 50. In a variant, it is of course conceivable that the cutouts of the cover releasing the access openings of the modular assembly conveying the neutral current has a shape adjusted to that of the access openings of this modular assembly, so as to release only one access opening, or on the contrary that they have a length adapted to release a greater number two access openings of this modular assembly. The cover 50 also comprises auxiliary cutouts 511, 521 (FIGS. 2 and 3) provided opposite the auxiliary openings 151 of each modular assembly 10. The auxiliary cutouts 511, 521 of the cover 50 release access to the auxiliary openings 151 associated with the access openings 15 released by each cut 51, 52.

Naturally, the cuts 52 releasing access to two successive access openings 15 of the modular assembly 10 conveying the neutral current, each of these cuts 52 also frees access to the auxiliary opening 151 associated with one of these two access openings 15.

The cover 50 further comprises mounting means on the insulating base 40, here clipping means. Alternatively, any other mounting means known to those skilled in the art may be considered. The mounting means by clipping the cover 50 on the insulating base 40 here comprise a plurality of clipping lugs 54, 55 (Figure 3). Each clipping lug 54, 55 extends along a longitudinal edge of the plate 53, perpendicularly to said plate 53, on the side of the rear face 532 of the cover 50. Two types of clipping lugs are provided here.

A first type of clipping tabs 54 is provided along the part of the cover covering the first compartment 401 and a second type of clipping tabs 55 is provided along the part of the cover 50 covering the second compartment 402 (FIG. 3). . Each clipping lug 54 of the first type is adapted to be inserted into a housing 411 (FIG. 4) arranged protruding outwardly from the insulating base 40, on one of the longitudinal lateral wings 41 of the insulating base 40. Each housing 411 comprises in particular here a wall parallel to the corresponding longitudinal side wing which comprises a slot 412 in which is housed a hooking tooth 541 of the clipping lug 54 (Figures 3 and 4). Advantageously, when the clipping lug 54 is inserted into the corresponding housing 411, it is hidden by this housing. Each clipping lug 55 of the second type comprises a hooking tooth on its inner face turned towards the base 40 and is adapted to cooperate with a slot 406 of one of the longitudinal walls of the second compartment 402 (FIG. 4). The cover 50 is thus retained on the insulating base 40. It is also manually removable. It is then necessary to use tools to unclip the hood, which prevents accidental removal.

As a variant, it can of course be envisaged that the connection device comprises only one or two modular assemblies conveying a phase current. The connection device is then bipolar or three-pole. In practice, the mounting and electrical connection of the connection device 100 is as follows. The modular assemblies 10 are arranged in the base 40. The cover 50 is snapped onto the base 40. The connection device 100 is disposed in an electrical box (not shown). The slides 420 (Figure 4) provided on the longitudinal side wings 41 accommodate means for mounting the device on a mounting rail. These are for example mounting feet known to those skilled in the art. The connection device 100 can thus be mounted in the electrical box, parallel to said mounting rail which also receives a row of electrical equipment. The power supply cables of the electrical box are inserted into the access ports 405 of the base 40 and thus introduced into the screw terminals 301, 311, 321, 331. The corresponding screws are tightened through the cover 50 of the device. connection through the openings 334 of the cover 50 giving access to these screws. Finally, the electrical equipment of the row is supplied by the connecting device by means of appropriate electrical conductors which are inserted through the cutouts 51, 52 of the cover 50 and the access openings 15 of the modular assemblies 10, in the orifice. the spring blade 12 of a connector of the conductive bar 11. This spring blade 12 then maintains the electrical conductor in contact with one of the electrical connection lugs 111 of the busbar 11 concerned.

Claims (15)

REVENDICATIONS1. Electrical connection device (100) for supplying at least one row of modular electrical equipment, comprising at least two modular assemblies (10) each comprising, on the one hand, a conductive bar (11) provided with a plurality of tabs electrical connection (111) and, on the other hand, an insulating element (13) having a front wall (14) provided with access openings (15) to said electrical connection tabs (111), characterized in that said busbars (11) comprise an identical number of electrical connection tabs (111) and that there is provided a cover (50), made in one piece, which covers the front walls (14) of said insulating elements ( 13) and which includes cutouts (52) allowing access to certain electrical connection lugs (111) of one of said busbars (11) which it prohibits access to the other busbar (11). 2. Electrical connection device (100) according to claim 1, wherein the cover (50) comprises, vis-à-vis the access openings (15) of at least a first of said modular assemblies (10), a plurality of first cutouts (51) arranged to release one of two access ports (15) of this modular assembly (10). An electrical connection device (100) according to claim 2, wherein each first cutout (51) releases a single access opening (15) from the modular assembly (10). 4. Electrical connection device (100) according to one of claims 2 and 3, wherein each first cut (51) has a circular shape. Electrical connection device (100) according to one of claims 2 to 4, wherein said first modular assembly (10) comprises a conductive bar (11) intended to be connected to a phase current. 30 6. Electrical connection device (100) according to one of claims 1 to 5, wherein the cover (50) comprises, vis-à-vis the access openings (15) of at least a second of said sets modular (11), a plurality of second cutouts (52) arranged to release all the access openings (15) of this modular assembly (10). 7. Electrical connection device (100) according to claim 6, wherein each second cutout (52) releases at least two successive access openings (15) of the modular assembly (10). 8. The electrical connection device (100) according to one of claims 6 and 7, wherein each second cutout (52) has an elongate shape. The electrical connection device (100) according to one of claims 6 to 8, wherein said second modular assembly (10) comprises the conductive bar (11) intended to be connected to the neutral current. 10. Electrical connection device (100) according to one of claims 1 to 9, wherein each modular assembly (10) comprises a leaf spring (12) associated with each electrical connection lug (111) whose access is authorized by the cover (50) and has no leaf spring (12) for 15 electrical connection lugs (111) whose access is prohibited by the cover (50). 11. Electrical connection device (100) according to one of claims 1 to 10, wherein there is provided a base (40) within which said modular assemblies (10) are arranged and on which said cover (50) has climbed. 20 12. Electrical connection device (100) according to claim 11, wherein said cover (50) comprises clipping tabs (54, 55) adapted to cooperate with receiving means (411, 406) of the base (40) for its mounting on this one. An electrical connecting device (100) according to claim 12, wherein said clipping tabs (54, 55) and said receiving means (411, 406) are arranged so that when the hood (50) is mounted on the base (40), at least a part of the clipping lugs (54, 55) is hidden. 14. Electrical connection device (100) according to one of claims 11 to 13, wherein the cover (50) is mounted manually unmountable on the base (40). 15. Electrical connection device (100) according to one of claims 1 to 14, wherein the cover (50) has on its front face (531) visible from outside indicators (533) indicating the electrical characteristics of sets modular modules (10) arranged under the hood (50).