FR3060223A1 - MODULAR COUNTER TO BE POWERED BY A POWER COMB AND ELECTRICAL ASSEMBLY COMPRISING SUCH A COUNTER AND A DEVICE FOR LOCKING THE COMB IN THE CONNECTION POSITION - Google Patents

Abstract

The invention relates to a modular meter (1) of electrical energy adapted to be powered by at least one feed comb, said modular counter comprising an insulating casing (20) of generally parallelepiped shape having two opposite main lateral faces (22). joined by a transverse upper face (23), wherein said transverse upper face comprises at least three openings each giving access to a separate electrical terminal, a first and a second of these openings (5A, 5B) giving access to an electrical terminal of phase and being arranged on a first row (R1) extending in a direction perpendicular to said main lateral faces of the housing, the third of these openings (15) giving access to an electrical neutral terminal and being arranged on a second row (R2 parallel to said first row, and in which there is further provided an insulating wall (40) which raises perpendicularly from said transverse upper face into the space separating said first and second openings. According to the invention, said transverse upper face comprises at least one blind hole (45) aligned with said third opening on said second row, the third opening and said blind hole being spaced so that they are adapted to receive a tooth connection of a standardized feed comb, and in that said insulating wall has a length such that it leaves free the space provided between said third opening and said blind hole.

Description

Holder (s): LEGRAND FRANCE Public limited company, LEGRAND SNC General partnership.

Extension request (s)

Agent (s): JACOBACCI CORALIS HARLE Simplified joint-stock company.

MODULAR COUNTER TO BE SUPPLIED BY A SUPPLY COMB AND ELECTRICAL ASSEMBLY COMPRISING SUCH A COUNTER AS WELL AS A DEVICE FOR LOCKING THE COMB IN THE CONNECTION POSITION.

FR 3 060 223 - A1 (5 // The invention relates to a modular electrical energy meter (1) adapted to be supplied by at least one supply comb, said modular meter comprising an insulating housing (20) of generally shaped parallelepiped having two opposite main lateral faces (22) joined by a transverse upper face (23), in which said transverse upper face has at least three openings each giving access to a separate electrical terminal, a first and a second of these openings (5A , 5B) giving access to an electrical phase terminal and being arranged in a first row (R1) extending in a direction perpendicular to said main lateral faces of the housing, the third of these openings (15) giving access to an electrical terminal of neutral and being arranged in a second row (R2) parallel to said first row, and in which a wall is further provided t insulator (40) which rises perpendicularly from said transverse upper face in the space separating said first and second openings.

According to the invention, said transverse upper face comprises at least one blind hole (45) aligned with said third opening on said second row, the third opening and said blind hole being spaced such that they are adapted to receive a tooth connecting a standardized supply comb, and in that said insulating wall has a length such that it leaves free the space provided between said third opening and said blind hole.

Technical field to which the invention relates

The present invention relates generally to the field of modular electrical appliances.

It relates in particular to a modular counter adapted to be supplied by at least one supply comb.

More specifically, it relates to a modular electrical energy meter adapted to be supplied by at least one supply comb, said modular meter comprising an insulating housing of generally parallelepipedal shape having two opposite main side faces joined by a transverse upper face, in which said transverse upper face has at least three openings each giving access to a separate electrical terminal, a first and a second of these openings giving access to an electrical phase terminal and being arranged in a first row extending in a direction perpendicular to said faces main side of the housing, the third of these openings giving access to an electrical neutral terminal and being arranged in a second row parallel to said first row, and in which there is further provided an insulating wall which rises perpendicularly from said transverse upper face in the es pace separating said first and second openings.

Technological background

Conventionally, a modular meter is known that is electrically powered by electrical supply cables directly connected to the electrical terminals of this modular meter.

Such a modular meter is impractical to install because its connection requires being able to access above and to the rear of its housing, which is all the more difficult when the modular meter is installed on a mounting rail between several devices. modular electrical units in the same row of an electrical panel. In addition, the installer must individually connect each cable with one or more corresponding electrical terminals, which is tedious and can lead to connection errors.

There is also known a modular meter as described in the introduction, integrated on a row of an electrical panel between a differential circuit breaker and other modular electrical devices. This modular meter is supplied by a comb specially designed for this supply so as to guarantee the correct electrical connection of the modular meter.

However, such a modular meter is necessarily arranged adjacent to the differential circuit breaker, which constrains the organization of the row of the electrical panel. In addition, it requires the use of a specific comb, which multiplies the manufacturing references and increases the cost of installation.

Object of the invention

In order to overcome the aforementioned drawbacks of the state of the art, the present invention provides a modular electric energy meter, the installation of which is simplified by the connection of one or more standardized combs of electrical supply.

More particularly, according to the invention, there is proposed a modular counter as defined in the introduction, in which said transverse upper face comprises at least one blind hole aligned with said third opening on said second row, the third opening and said blind hole being spaced so that they are adapted to receive a connection tooth of a standardized supply comb, and in which said insulating wall has a length such that it leaves free the space provided between said third opening and said hole one-eyed.

Thus, the configuration of the module of the modular meter according to the invention, providing a blind hole on the neutral current supply row and an insulating wall on the phase current supply row, avoids any connection error of the combs standardized: the installer inserts the last tooth of a phase input comb into the first opening, the first tooth of a phase output comb into the second opening, and any two teeth of a single neutral comb in the third opening and the blind hole.

Advantageously, the phase current is therefore forced to pass through the modular meter before supplying the modular electrical appliances of the row of the electrical panel located downstream of said modular meter, so that this modular meter counts the energy consumed in these electrical appliances modules located downstream. On the contrary, thanks to the blind hole, the neutral current feeds indifferently the modular electrical appliances of the row of the electrical panel situated upstream and downstream of said modular meter, via a single standardized comb.

Other non-limiting and advantageous characteristics of the modular counter according to the invention are as follows:

the transverse upper face comprises a second blind hole aligned with said third opening on said second row, said third opening and said blind holes being spaced such that said third opening and one of the two blind holes are each adapted to receive a connecting tooth of said standardized supply comb;

- the main side faces of the housing are distant by a value equal to an integer multiple of a predetermined base width;

- Said first, second and third openings each belong to a separate pair of openings giving access to a double electrical terminal, the openings of the first and second of these pairs of openings being regularly spaced and all arranged on said first row , and the openings of the third of these pairs of openings being arranged on said second row.

The invention also provides an electrical assembly comprising a modular meter as mentioned above and a device for locking said standardized supply comb in the connection position on said modular meter, said locking device comprising:

- a fixed part adapted to be linked to said standardized feed comb,

a movable part mounted to move on said fixed part and having a hooking position, and

a locking element movably mounted on said movable part between an unlocked position in which it allows the displacement of said movable part relative to the fixed part, and a locked position in which it blocks said movable part in its hooking position, said movable part comprising a passage conduit for an inextensible tamper-evident element, this passage conduit extending across the place of movement of said locking element, the distance separating said locking element in the locked position and said passage conduit being strictly less than the travel of said locking element between its locked position and its unlocked position.

Thus, once the standardized power supply combs are locked in the connection position on the modular meter, and the inextensible tamper-evident element introduced into the passage duct, the locking of said standardized combs is made inviolable since the disconnection of these this requires placing the locking element in the unlocked position, which is either prevented by the inextensible tamper-evident element, or made visible by the degradation of the latter.

The inextensible tamper-evident element is for example made up of a wire element placed in the passage duct and then sealed by means of a weld. It can be an inextensible inviolability element already commonly used on general electric meters. Conventionally, the inextensible tamper-evident element can be a metal cable sealed by a metal weld commonly known as "lead". It can also be a relatively rigid plastic wire, in particular plastic, sealed by a plastic weld.

Advantageously, the electrical assembly according to the invention thus makes it possible to reliably count the energy consumed in a power line in a reliable and non-falsifiable manner. This electrical assembly also complies with the standards in force (in particular the "MID" directives) so that it can be used for energy billing.

Other non-limiting and advantageous characteristics of the electrical assembly according to the invention are as follows:

- Said passage duct is formed by through holes, arranged opposite one another and having a common axis extending through said place of movement of the locking element;

- Said movable part is adapted to slide between its hooking position and a free position in which it authorizes the withdrawal of the standardized feed combs, and in which said locking element is movable in sliding in a direction perpendicular to the direction of sliding of said mobile part, between its locked position where it is interposed between said fixed part and said mobile part and its unlocked position where it projects through said passage duct;

- Said fixed part of the locking device comprises a retaining cover adapted to span said standardized comb of electrical supply in the connection position on said modular meter, said retaining cover comprising a front wall and a rear wall joined by two side walls, a lower edge forms a stop element opposing the withdrawal of said comb, the front face of said front wall of said retaining cover carrying a mounting platform for said movable part;

- Said cover for holding the locking device comprises at least one pin adapted to engage in an empty housing provided in the housing of the modular counter, through an orifice provided in the transverse upper face of said housing to adjust the position of said holding cover on said housing, said pin further forming a stop element for the movable part of the locking device;

- Said empty housing is further adapted to receive a hooking means of the movable part of the locking device placed in the hooking position as well as a part of the locking element placed in the locked position, this part being positioned between said pin and said attachment means.

Detailed description of an exemplary embodiment

The description which follows with reference to the appended drawings, given by way of nonlimiting examples, will make it clear what the invention consists of and how it can be carried out.

In the accompanying drawings:

- Figure 1 is a schematic perspective view of a modular meter according to the invention arranged on a row of modular electrical devices, supplied in single phase by standardized combs of electrical supply;

- Figure 2 is a schematic perspective view of the modular meter of Figure 1;

- Figure 3 is a schematic exploded perspective view from above of the modular meter of Figure 2;

- Figure 4 is a schematic perspective view from above of an electrical assembly according to the invention, in which the locking device is about to be mounted on the modular meter;

- Figure 5 is a front perspective view of the electrical assembly of Figure 4 mounted in a row of modular electrical devices, in which the locking device is tamper-proof secured on the modular meter;

- Figures 6 and 7 are exploded front perspective views, respectively from above and from below, of the locking device of the electrical assembly of Figure 4;

- Figure 8 is a rear perspective view of the movable part of the locking device of Figures 6 and 7; and,

- Figures 9 to 12 are sectional views of four stages of assembly, attachment, locking and tamper-proof securing of the electrical assembly of Figure 5.

By convention, in the following description, the terms "front" and "rear" will be defined in relation to the gaze of the user turned towards a modular meter in the normal position of use in a cabinet or electrical cabinet. Thus, the term "front" will denote the side of the modular counter facing the user, while the term "rear" will denote the side of the modular counter facing away from it.

The terms “upstream” and “downstream” will be defined in relation to the order of supply of modular electrical appliances of the same row of an electrical panel.

In FIGS. 1 to 3, there is shown a modular electrical energy meter 1 adapted to receive standardized combs 50 of electrical supply which distribute the current in single phase to different modular electrical devices 2 of the same row of a table electric housed in an electrical box or an electrical cabinet.

The modular meter 1 comprises an insulating housing 20 housing an electrical phase input terminal 7A (shown in FIG. 3) adapted to receive a phase current and an electrical phase output terminal 7B (represented in FIG. 3) by which outputs the phase current to be distributed to the modular electrical devices 2 located downstream of said modular meter 1, in the same row. The modular counter 1 counts down here the phase current consumed in the line of the electrical circuit located downstream of it, by measuring the potential across a shunt resistor of known value, connected, on one side, to said electrical terminal input phase 7A and, on the other, to said phase output electrical terminal 7B.

In practice, as shown in FIGS. 1 and 2, the housing 20 of the modular meter 1 has a generally parallelepiped shape. It has two main lateral faces 22, a rear face 24 provided with a horizontal groove 26 for mounting on a rail (not shown) of the electrical panel, a front face 21 which has projecting, in its median zone, a part of front 28 through which the housing 20 is intended to emerge from a front plate (not shown) of an electrical cabinet or cabinet, when it is placed on the rail, and two transverse upper and lower faces 23, 25 .

The counter is said to be “modular” in the sense that its main lateral faces 22 are distant from an integer multiple of a basic module M of 18 mm. Here, the modular meter 1 has a width equal to two basic modules M. The main side faces 22 of the housing 20 are intended to be brought into contact with the main faces of other modular electrical devices 2, for example those of modular circuit breakers , to form the row of the electrical panel (see figure 1).

As shown in Figure 2, the front portion 28 of the front face 21 of said housing 20 has a recess 28A in which are provided openings 28B, 28C intended to accommodate a screen 27 displaying the energy consumption and two buttons 29 accessible to the user to program the functionality of said modular counter 1 and / or modify the display of the screen (see figure 1).

As shown in Figure 1, the upper face 23 of said housing 20 is intended for the electrical connection of the modular meter 1 with the combs 50 standardized power supply.

The combs 50 are in themselves quite conventional and will not be described in detail. They are clearly visible in FIG. 4, and for the most part, each comb 50 comprises a metal connection bar, good conductor of electricity, housed in an insulating profile 51 (see FIGS. 9 to 12). Each connection bar comprises connection teeth 53 which project from this insulating profile 51. The combs 50 are "standardized" in that the connection teeth 53 of the same connection bar are spaced apart by a corresponding regular pitch P at the standardized distance from a basic module M, so that a comb 50 can supply several modular electrical devices 2 arranged on the same row of the electrical panel. Here, as shown in FIG. 1, the row of the electrical panel comprising the modular counter 1 is supplied by a single comb 50 standardized for neutral current supply, disposed at the rear of said modular counter 1, and by two combs 50 standardized phase current supply, arranged at the front of said modular meter 1 and separated by an insulating wall 40. The combs 50 are all identical here, but, for convenience, in the following description, the standardized comb d the neutral current supply will be designated by “neutral comb” and the standard phase supply supply combs will be designated by “phase combs”.

In practice, the upper face 23 of said insulating housing 20 is arranged to receive the connection teeth 53 of said neutral and phase combs 50. For this purpose, as shown in FIG. 2, said upper face 23 has a first opening 5A and a second opening 5B giving respectively access to the electrical phase input terminal 7A and to the electrical phase output terminal 7B (see FIG. 3). The first and second openings 5A, 5B are arranged on a first row R1 extending in a direction perpendicular to said main lateral faces 22 of said housing 20, and each of the first and second openings 5A, 5B is intended to receive one of the connection teeth 53 of one of the phase combs 50, so that this connection tooth 53 is brought into contact with the branches of a cell of the corresponding phase input or output electrical terminal 7A, 7B.

As shown in Figures 1 and 2, the insulating wall 40 rises perpendicularly from said upper face 23 of said housing 20 in the space separating said first and second openings 5A, 5B. Here, the insulating wall 40 is perpendicular to the first row R1, and has a height slightly greater than the height of the connection teeth 53 projecting from the insulating profile 51 of the phase combs 50, so that said connection teeth 53 of a phase comb 50 which is disposed astride the insulating wall 40 could not be inserted into said first and second openings 5A, 5B. Thus, thanks to the insulating wall 40, it is impossible to connect two connection teeth 53 of the same phase comb 50 in said first and second openings 5A, 5B.

Thus, the phase input electrical terminal 7A is intended to receive the last connection tooth 53 of the input phase comb 50 supplying the modular electrical devices 2 located upstream of the modular meter 1, and the electrical output terminal of phase 7B is intended to receive the first tooth of the output phase comb 50 supplying the modular electrical appliances 2 located downstream of the modular meter 1.

Thus, the phase current supplied to the phase 7A electrical input terminal of the modular meter 1 by the input phase comb 50 is forced to pass through the shunt resistor of the modular meter 1 before coming out through the electrical terminal of phase output 7B connected to the output phase comb 50 which distributes this phase current to the modular electrical devices 2 located downstream of said modular meter 1.

As shown in Figure 2, said upper face 23 of the housing 20 of the modular meter 1 also includes a third opening 15 giving access to an electrical neutral terminal 17 housed in said housing 20 (see Figure 3). This third opening 15 is arranged on a second row R2 parallel to said first row R1. It is intended to receive one of the connection teeth 53 of the neutral comb 50, so that this connection tooth 53 is brought into contact with the branches of a cell of the neutral electrical terminal 17. The second row R2 is placed behind the first row R1 in the sense that it is located closer to the rear face 24 of the housing 20 of the modular meter 1 than said first row R1 which is in turn located closer to the front face 21 of said housing 20.

Remarkably, said upper face 23 further comprises at least one hole 45 opening onto an empty insulating cavity of the housing 20, aligned with said third opening 15 on said second row R2, and said insulating wall 40 leaves the space provided between said third opening 15 and said hole 45, said hole 45 being disposed at a distance such from said third opening 15 that they are each adapted to receive a connection tooth 53 distinct from the neutral comb 50.

The connection tooth 53 of said neutral comb 50, inserted into said hole 45, is not brought into contact with any electrical terminal, and, for convenience, said hole 45 will hereinafter be called a blind hole.

Thus, once the neutral comb 50 is connected to the row of the electrical panel, the neutral current is indifferently distributed to the modular meter 1 and to the modular electrical devices 2 located upstream and downstream from it.

As shown in FIG. 2, said upper face 23 here comprises a second blind hole 45 aligned with said third opening 15 on said second row R2. This second blind hole 45 forms with the first blind hole 45 a pair of blind holes. The distance separating said third opening 15 and one of the blind holes 45 is equal to the pitch P of regular spacing of the connection teeth 53 of the neutral comb 50. Thus, said third opening 15 and one of the two blind holes 45 are each adapted to receive a connection tooth 53 of this single neutral comb 50.

The two blind holes 45 are here associated with the same empty insulating cavity of the housing 20 (see FIG. 3), which advantageously simplifies the manufacture of the housing 20, but it would be conceivable that they lead to two separate empty insulating cavities.

As a variant, it could also be envisaged that the two blind holes are joined together to form a single blind hole having a greater width in the second row R2. The distance between said third opening 15 and this single blind hole would then be such that they would each be adapted to receive a connection tooth from the single neutral comb.

As shown in Figure 2, each of the first, second and third openings 5A, 5B, 15 here belongs to a separate pair of openings. Each pair of openings 5A, 5B, 15 gives access to a double electrical terminal for phase input 7A, phase output 7B or neutral 17 (see FIG. 3). The openings of each pair of openings are arranged in a single row, side by side. In particular, the first and second openings 5A, 5B are regularly spaced on said first row R1, and the insulating wall 40 then separates the openings 5A from the first pair of openings from the openings 5B from the second pair of openings. The openings 15 of the third of the pairs of openings are arranged side by side on said second row R2.

Advantageously, the connection tooth 53 of each phase and neutral comb 50 to be connected to the electrical terminal for phase input, phase output or neutral 7A, 7B, 17 can either be inserted in one or the other. other of the openings 5A, 5B, 15 of the same pair of openings. This increases the number of connection possibilities, without modifying the operation of the modular counter 1.

Structurally, as shown in detail in FIG. 3, the housing 20 is formed by the assembly of a front part 32, a rear part 31, and two insulating parts 38 housed in said rear and front parts 31, 32. Each of these elements is made of an insulating material, for example plastic, by molding.

More precisely, as shown in FIG. 3, the rear part 31 of the housing has a bottom 31A forming the rear wall of the housing 20, the external face of which forms the rear face 24 of said housing 20. Said bottom 31A is bordered by two side walls 31 B, an upper wall 31C and a lower wall 31 D, extending forward, perpendicular to said bottom 31 A. An intermediate wall 31E extends from the upper wall 31 C, towards the inside of the housing 20, parallel to said side walls 31 B, in an upper region of said rear part 31 of the housing. This intermediate wall 31E separates the upper region of the rear part 31 of the housing into two housings adapted to receive the two insulating parts 38. The intermediate wall 31E bears on each of these lateral faces, near the upper wall 31C and the wall before 31 A, a pin facing a pin carried by the internal face of each side wall 31 B, said pins being adapted to snap into a complementary means of mounting the insulating parts 38, for fixing said insulating parts 38 on the rear part 31 of the housing. Each side wall 31B of said rear part 31 of the housing also carries on its internal face a slide 39 adapted to receive a complementary means for sliding the insulating parts 38 to guide the positioning of said insulating parts 38 when they are fixed to the rear part 31 of housing. Each side wall 31B is finally provided on its external face with two snap-fit teeth 33 adapted to snap into complementary arrangements 34 of the front part 32 of the housing for assembling said rear and front parts 31, 32 of the housing.

As shown in FIG. 3, the front part 32 of the casing has a front wall 32A forming the front of the casing 20, the external face of which forms the front face 21 of said casing 20. The front part 32 of casing 20 further comprises two walls side 32B, an upper wall 32C and a lower wall 32D which extend rearward, perpendicular to said front wall 32A. An intermediate wall 32E extends from the upper wall 32C, towards the inside of the housing 20, parallel to said side walls 32B, in an upper region of said front part 32 of housing. This intermediate wall 32E separates the upper region of the front part 32 of the housing into two housings adapted to receive the two insulating parts 38. The intermediate wall 32E bears on each of these lateral faces, near the upper wall 32C and the wall before 32A, a pin (not visible in the figure) opposite a pin carried by the internal face of each side wall 32B, said pins being adapted to snap into a complementary means of mounting the insulating parts 38, for fixing said insulating parts 38 to the front part 32 of the housing. Finally, the side walls 32B have on their external face, near their free edge, slots 34 adapted to receive by snap-fastening said snap-fit teeth 33 of the rear part 31 of the housing for the assembly of said front and rear parts 31 , 32 of housing.

As shown in FIG. 3, a first of the two insulating parts 38 of the housing 20 delimits two distinct housings 36A, 37 intended to receive the double electric terminals of phase input 7A and neutral 17 in isolation. The other of the two parts insulators 38 delimits a housing 36B intended to receive the double electrical phase output terminal 7B in isolation, and another housing 47 which forms the empty insulating cavity of the housing 20 associated with said blind holes 45. Each insulating part 38 has on its upper wall two slots FA, F7, respectively FB, F, leading to said housings 36A, 37, respectively 36B, 47. Each insulating part 38 comprises at the rear two mounting ears 38A each carrying a hole intended to receive by snap-fastening one of the pins of the rear part 31 of the housing, and, at the front, a mounting part 38B carrying two holes intended to receive by snap-fastening two of the pins of the front part 32 of the housing (see FIG. 3). Each insulating part 38 also carries, at the rear, a slide 38D intended to engage in the slide 39 of the rear part 31 of the housing to guide the positioning of the insulating parts when they are attached to said rear part 31 of the housing. (see figure 3).

In practice, the insulating parts 38 are first mounted on the front part 32 of the housing so that the slides 38D of said insulating parts 38 serve as a guide for attaching the front part 32 of the housing to the rear part 31 of the housing. Once the rear and front parts 31, 32 of the housing are added to one another, the insulating parts 38 are located directly under the upper wall of said rear part 31 of the housing, and the slots FA, F7, FB, F said insulating parts 38 are located opposite the openings 5A, 5B, 15 and the holes 45 provided in the upper wall 31C of the rear part 31 of the housing, so that the double electrical terminals for phase input 7A, output of phase 7B and neutral 17, as well as the empty insulating cavity of the housing 20 are accessible from the outside of said housing 20. The upper walls 31 C, 32C of said rear and front parts 31, 32 of the housing as well as the upper wall of the parts insulators 38 then together form the upper wall of the housing 20 of the modular meter 1, the external face of which forms the upper face 23 of said housing 20.

Each of the double electrical input phase 7A, phase output 7B, and neutral 17 electrical terminals here comprises two adjacent lyre electrical terminals electrically connected by their base.

As shown in FIG. 3, the double electrical terminals for phase input 7A and phase output 7B are connected to a printed electronic circuit 30 which carries on its underside the shunt resistor (not visible). More specifically, said electrical phase input and output terminals 7A, 7B are connected to each other by means of this shunt resistor. The printed electronic circuit 30 is controlled by a main circuit 35 connected to the neutral electrical terminal 17 and to the phase input electrical terminal 7A so that this main circuit 35 is supplied by a normalized potential difference, from order of 230V in France.

The modular counter 1 presented in Figures 1 to 3 is a single-phase modular counter, insofar as it receives a neutral current and a single phase current, and that it counts the single phase current consumed.

As a standard, the 1-phase modular meter 1, like the 2-phase modular electrical devices 2, receives the neutral current at the rear of the upper face of their casing, and the phase current at the front of the said upper face. One could however choose that they receive the neutral current at the front and the phase current at the rear. In this case, the first and second rows should be inverted, and the insulating wall should be shifted backwards so that it always rises between the first and second openings in the first row.

It would also be quite possible for the modular meter to be a three-phase modular meter. In this case, the upper face of the housing has, from the front to the rear of said housing, three rows of parallel phase current supply, identical to the first row R1 described above, and a row of current supply neutral parallel to these three rows and identical to the second row R2 described above.

In this case, the insulating wall extends perpendicular to the three rows of phase, in the space separating the openings giving access to the electrical phase input terminals and the openings giving access to the electrical phase output terminals. It leaves the space provided between the openings and the blind holes in the neutral row.

The three-phase modular meter is then adapted to receive, on the neutral current supply row, a single neutral comb, and, on the three rows of phase current supply, three input phase combs, d 'one side of the insulating wall, and three output phase combs, on the other side of the insulating wall.

As a variant, the three-phase modular meter could also be adapted to receive a standardized comb for supplying three-phase input current and a standardized comb for supplying three-phase output current, instead of the three input phase combs and three output phase combs. Standardized three-phase power supply combs include a single insulating profile housing three separate, parallel metal connection bars, each with connection teeth that protrude from the insulating profile.

Advantageously, as shown in FIG. 4, whether it is single-phase or three-phase, the modular counter 1 according to the invention participates in an electrical assembly 1000 comprising a locking device 10 for said phase and neutral combs 50 in the position of connection to said modular meter 1.

The modular counter 1 is adapted to receive said locking device 10 on the upper face 23 of its housing 20.

To this end, as shown in Figures 2 to 4, the upper face 23 of the housing has mounting holes 6A, 6B opening onto empty housings 9A, 9B of said housing 20 adapted to receive complementary positioning means of said locking device 10. Here, the upper face 23 has four openings 6A regularly spaced along a front row RA parallel to said first and second rows R1, R2 and located at the front of said first row R1 on said housing 20, and two openings 6B arranged on a rear row RB parallel to said first and second rows R1, R2 and situated at the rear of said second row R2. Here, only the two central holes 6A are used for mounting the locking device 10.

As shown in FIG. 3, the orifices 6A are carried by the front part 32 of the housing, while the orifices 6B are carried by the rear part 31 of the housing. When the housing 20 is assembled, said orifices 6B open into an empty space left between the two mounting ears 38A of the insulating parts 38. The orifices 6A open as for them into orifices 38C carried by the upper wall of the mounting part 38B of said insulating parts 38. The orifices 38C of the insulating parts 38 have a shape similar to said orifices 6A.

More particularly, the locking device 10 comprises a fixed part 100 adapted to be linked to said phase and neutral combs 50, a movable part 200 adapted to move relative to this fixed part 100 and which has an attachment position on the housing 20 of the modular counter 1, and a locking element 300 itself movable on the movable part 200 and which has an unlocked position in which it allows the displacement of said movable part 200 relative to the fixed part 100 and a position locked in which it blocks said movable part 200 in its hooking position.

Here, as shown more particularly in Figures 6 and 7, the fixed part 100, the movable part 200, and the locking element 300 of the locking device 10 are three independent parts adapted to be attached to each other to form the locking device 10 assembled in FIG. 4. Each of the three parts is here produced in one piece, by molding an insulating plastic material.

The fixed part 100 is in the form of a retaining cover 100 adapted, on the one hand, to cooperate with the modular counter 1, and, on the other hand, to receive a cap 200 (forming the movable part 200) so that the cap 200 can slide on the retaining cap 100 along a sliding direction X (see FIG. 6). The cap 200 receives the locking element 300 from above. This locking element 300 is movable by sliding on the cap 200, in a direction Y perpendicular to the sliding direction X of the cap 200 (see FIG. 6).

Advantageously, the cap 200 comprises a passage conduit 250 for an inextensible tamper-evident element 400 (shown in FIGS. 5 and 12), this passage conduit 250 extending across the place of movement of said locking element 300 , here along an axis Z (see FIG. 6), so that, once the locking element 300 placed in the locked position on the cap 200, the inextensible tamper-evident element 400 introduced into this passage conduit 250 prohibits the movement of said locking element 300 from its locked position to its unlocked position.

More precisely, the distance which separates said locking element 300 in the locked position on the cap 200 and said passage duct 250 is strictly less than the travel of said locking element 300 between its locked position and its unlocked position.

The inextensible tamper-evident element 400 is for example constituted by a wire element introduced into said passage duct 250 and then sealed on itself by a weld. The wire element is advantageously a link whose free ends are welded. This link can be made of metallic or plastic material, and the welding is therefore metallic or plastic.

Due to the advantageous arrangement described above, the introduction of an inextensible tamper-evident element 400 into the passage duct 250 prevents the locking element 300 from being unlocked, therefore the locking device 10 being disassembled and therefore disconnected. the phase or neutral combs 50 which are held on the modular counter 1 by this locking device 10. At the very least, the disassembly of the locking device 10 is made visible by the degradation of the inextensible tamper-evident element 400 necessary for unlocking the locking element 300.

In the following description, the different parts of the locking device 10 will be described in more detail, and their orientation will be given in correspondence with the orientation of the modular counter 1 on which it is sought to lock the phase and neutral combs 50 inviolably.

As shown in Figures 5 and 9 to 12, the holding cover 100 of the locking device 10 is adapted to span the phase and neutral combs 50 in the connection position on the modular counter 1, and thus prevents their disconnection.

As shown more precisely in Figures 4, 6 and 7, the retaining cover 100 has a generally parallelepiped shape having an inverted U-shaped profile. It comprises a front wall 101 and a rear wall 104, joined by two side walls 102 and by an upper wall 103. The total width of the retaining cover is less than or equal to the width of the modular counter 1, the retaining cover 100 being the widest part of the locking device 10.

Each side wall 102 has a height such that, when the retaining cover 100 spans the phase and neutral combs 50, its lower edge 106 forms a stop element opposing the withdrawal of said phase and neutral combs 50 (see figure 5).

To reinforce the retaining cover 100, the front wall 101 has three stiffening ribs 107 on its front face 101A and the rear wall 104 has two stiffening ribs 107 on its rear face 104B (see FIG. 6).

Furthermore, the front wall 101 of the retaining cover 100 carries, projecting and cantilevering from its front face 101 A, a platform 150 for sliding mounting of the cap 200.

As shown more precisely in FIG. 7, this platform 150 comprises a base wall 151 which extends from the lower edge 105 of the front wall 101, generally perpendicular to this front wall 101 and parallel to the upper wall 103 of the cover retaining 100. Two side blanks 152 rise from this base wall 151 perpendicular thereto, and parallel to the side walls 102 of the retaining cover 100. These side blanks 152 serve as guides for the sliding of the cap 200 on the retaining cover 100.

The base wall 151 of the platform 150 is pierced with two slots 153 adapted to be traversed by means for hooking the cap 200 (see FIG. 7). As will be described in more detail later, the hooking means of the cap 200 are intended to engage in the empty housing 9A of the housing 20 of the modular meter 1 to hang under the upper wall of this housing 20 (see figures 9 to 12). The slots 153 allow the movement of the attachment means between the attachment position of the cap 200, in which these attachment means block the retaining cover 100 on the modular counter 1 to prevent disconnection of the phase and neutral combs 50 of said modular counter 1, and a free position in which the retaining cover 100 can be separated from the modular counter 1 to disconnect said phase and neutral combs 50.

As shown in FIGS. 6 and 7, the platform 150 also comprises sliding means adapted to receive complementary means for sliding the cap 200.

These sliding means comprise a sliding ramp 155 extending on the base wall 151 in a central region thereof, parallel to the side blanks 152. The sliding ramp 155 has a T-profile and thus laterally defines two grooves 154 which constitute a slide for the cap 200.

The sliding means also comprise two horizontal grooves 156 hollowed out in the external faces 152A of the side blanks 152 of the platform 150. Each groove 156 has one end attached to the front wall 101 of the retaining cover 100 and has a length corresponding to the sliding stroke of the cap 200 on the retaining cap 100.

As shown in FIGS. 6 and 7, the retaining cover 100 also carries means for signaling to the installer the correct position for attaching the cap 200 to the modular meter 1. These signaling means comprise two vertical grooves 157 hollowed out on the external faces 152A of the side blanks 152 of the platform 150. Each groove 157 is adapted to cooperate by snap-fastening with a corresponding rib 207 of the cap 200 (see FIG. 7).

Finally, the retaining cover 100 includes pins 110, 160 for positioning on said modular counter 1.

As shown in FIG. 7, the retaining cover 100 here comprises two pins 110 which extend from the lower edge 108 of the rear wall 104 of the retaining cover 100, in the extension of the axis of extension of the ribs 107 of this rear wall 104. Each pin 110 is adapted to engage in the empty housing 9B of the housing 20 of the modular meter 1, via the orifice 6B opening onto the upper face 23 of said housing 20 (see FIG. 4).

According to a variant not shown, it could be provided that the lower edge of the rear wall of the retaining cover does not carry any pin, so that, when the cover spans the combs, said lower edge bears directly on the upper face of the housing of the modular counter.

As shown in FIG. 7, the retaining cover 100 here comprises two other pins 160 which extend from the lower face 151A of the base wall 151 of the platform 150. Each pin 160 is intended to engage in the empty housing 9A of the housing 20 of the modular counter 1, via the orifice 6A opening on the upper face 23 of said housing 20 (see FIG. 4). Advantageously, the rear face of each pin 160 is adapted to abut against a hook 8 provided in said orifice 6A. Said pins 160 thus have a keying function and only allow one mounting position of the retaining cover 100 on the housing 20.

Advantageously, these pins 160 extend in front of the slots 153 of the platform 150, so that they also form a stop element for the means for hooking the cap 200 passing through the slots 153 of said platform , when said cap 200 is in place in the free position on the retaining cap 100 (see FIG. 9).

As shown in Figures 6 to 8, the cap 200 comprises two side walls 202 connected by an upper wall 203 and a front wall 201 so as to be able to cover said platform 150 of the retaining cover 100, the internal faces 202B of the side walls 202 of the cap 200 then flush with the external faces 152A of the side blanks 152 of said platform 150.

The hooking means of the cap 200 comprise two hooks 205 which extend downwards, from the upper wall 203 of said cap 200, in the extension of the rear edge of this upper wall 203. These hooks 205 project under the front and side walls 201, 202 of the cap 200.

As shown in Figures 7 and 8, each hook 205 has a leg 205A which extends parallel to the side walls 202 of the cap 200, and a foot 205B which extends perpendicular to the leg 205A, opposite the wall front 201 of the cap 200.

In the free position, for example shown in FIG. 9, the back of each hook 205 is placed in abutment against the corresponding pin 160 of the retaining cover 100.

In the hooking position, for example shown in FIG. 10, the foot 205B of each hook 205 engaged in the housing 9A of the housing 20 of the modular meter 1 cooperates with retention with the upper wall of said housing 20, directly above the front wall 101 of the retaining cover 100. The rear face of the leg 205A of each hook 205 has a notch 205C which rests, on the one hand, against the edge of the orifice 6A of said housing 9A, and, on the other hand, against the edge of the slot 153 of the base wall 151 of said platform 150 of the retaining cover 100.

As shown in FIGS. 7 and 8, the complementary means for sliding the cap 200 comprise two opposite legs 210 which extend inside said cap 200 from the upper wall 203, parallel to the hooks 205 , in a central region of said cap 200. Each tab 210 carries at its free end a tooth 211 turned towards the other tab 210. These tabs 210 provided with their tooth 211 form a slide adapted to slide in the grooves 154 of said ramp sliding 155 of the retaining cover 100.

As shown in FIG. 8, the complementary means for sliding the cap 200 further comprise two horizontal teeth 206, turned towards the inside of said cap 200, each carried by the internal face 202B of one of the side walls 202, in a region lower and rear of said cap 200. These teeth 206 are adapted to snap into the two horizontal grooves 156 of the side blanks 152 of the platform 150 to ensure the correct assembly of the cap 200 on the retaining cap 100 and guide the sliding of said cap 200 on platform 150.

The internal face 202B of each side wall 202 also carries the vertical rib 207, placed near the front wall 201 of said cap 200 and adapted to snap into the corresponding vertical groove 157 of the retaining cap 100, when the cap 200 reaches its hooking position from its free position.

There is also provided, on the external face 202A of each of said side walls 202 of the cap 200, a gripping area 204 of this cap 200 which includes non-slip means, for example in the form of ridges or ribs, to facilitate its grip. hand, especially to move it between its free position and its hanging position.

As shown in FIG. 6, each of said side walls 202 is extended by an upright 252 which projects above the upper wall 203 of said cap 200. The two uprights 252 are parallel and delimit between them an external part of the place of movement of the locking element 300. Each upright 252 is here terminated in its upper part by an ear which carries a through hole 251. The through holes 251 are arranged opposite one another and thus form the passage conduit 250 of axis Z extending through the place of movement of the locking element 300.

Here, as shown in FIG. 6, the Z axis of the through holes 251 extends in a direction perpendicular to the direction Y of sliding of the locking element 300 in the cap 200.

The locking element 300 is here formed of a nail which has the shape of a jumper. As shown in Figures 6 and 7, the nail 300 more specifically comprises a head 310 from which extend two legs 320 parallel. Each tab 320 is adapted to engage through an opening provided in the upper wall 203 of the cap 200, between the two uprights 252, and to slide in a slide of the latter leaning against said hook 205. The head 310 remains accessible to the user between the two uprights 252 of the cap 200, whatever the position of the nail 300 in the cap 200.

In practice, each tab 320 slides in the internal space defined between (see FIG. 8) the internal face 202B of one of the side walls 202, one of the hooks 205 and one of the legs 210 of said cap 200. This internal space constitutes the slide described in the previous paragraph.

In the locked position, shown in FIGS. 11 and 12, the head 310 of the nail 300 is housed between the two uprights 252 of the cap 200, against the upper face 203 of this cap 200. In this locked position, the tabs 320 of the nail 300 pass through the slot 153 of the platform 150 of the retaining cover 100 to be interposed between the hook 205 of the cap 200 and the pin 160 of the retaining cover 100. The tabs 320 thus block any sliding movement of the hooks 205 in the slots 153 of the platform 150. Advantageously, in this locked position, the head 310 of the nail 300 is located below the passage duct 250 in which the inextensible tamper-evident element 400 is threaded (see FIGS. 11 and 12). It will therefore be understood that the inextensible tamper-evident element 400 positioned in the passage duct 250 (see FIG. 12) will prohibit the withdrawal of the nail 300 from its locked position, since said inextensible tamper-evident element 400 extends near said nail 300 and that it will prevent the displacement of the nail 300 from its locked position to its unlocked position. Indeed, the distance separating the inextensible tamper-evident element 400 positioned in the passage duct 250 and the head 310 of the nail 300 is less than the travel of displacement of said nail 300 between its locked position and its unlocked position.

In the unlocked position, for example shown in FIGS. 9 and 10, the free end of each tab 320 of the nail 300 is positioned set back from the slot 153 of the retaining cover 100, and the head 310 of the nail 300 projects through of the passage duct 250 carried by the uprights 252 of the cap 200. In this unlocked position, the nail 300 releases the slots 153 and authorizes the sliding movement of the legs 250A in said slots 153. The cap 200 thus slides freely on the platform 150 of the retaining cover 100.

Each tab 320 of the nail 300 also includes fitting means adapted to block the movement of said nail 300 in each of its locked and unlocked positions.

More specifically, as shown in Figures 6 and 7, said interlocking means comprise two notches 321 on each tab 320 of said nail 300 which cooperate alternately with an edge 209 of the opening provided in the upper wall 203 of the cap 200 and giving access to the slide of the cap 200 (see figure 9).

In FIGS. 9 to 12, there is shown the sectional views of the stages of assembly, attachment, locking and tamper-proof securing of the phase and neutral combs 50 on the modular counter 1 arranged in the row of electrical devices. modular 2 of figure 5.

An installer connects the neutral comb 50 in all of the modular electrical appliances 2 in the row so that a connection tooth 53 of said neutral comb 50 is inserted into one of the third openings 15 of the housing 20 and that the next tooth of said neutral comb 50 is inserted into one of the blind holes 45. It brings the connection tooth 53 of the neutral comb 50 into contact with the branches of the corresponding double electric neutral terminal 17 of the modular counter 1 , and the annoying connection tooth 53 in the blind hole 45, so that the connection of the modular electrical devices 2 located downstream is not disturbed. The installer connects the input phase comb 50 to all of the modular electrical devices 2 in the row located upstream of the modular meter 1 so that the last connection tooth 53 of this input phase comb 50 s 'inserted into one of the first openings 5A to bring this tooth into contact with the corresponding branches of the double phase input electrical terminal 7A. Similarly, the installer pushes the first connection tooth 53 of the output phase comb 50 into one of the second openings 5B to bring this tooth into contact with the branches of the corresponding double phase output electrical terminal 7B, the others teeth of the output phase comb 50 supplying the modular electrical devices 2 located downstream of the modular meter 1 in the same row of the electrical panel. The two input and output phase combs 50 are thus separated by the insulating wall 40, so that the installer is assured of having correctly connected said phase combs 50 to the modular counter 1, which will then count reliably the phase current consumed in the supply line located downstream of said modular counter 1. The underside of the profile 51 of each phase and neutral comb 50 then adjoins the upper face 23 of the housing 20 of the modular counter 1.

The installer then pre-assembles the locking device 10 before mounting it on the modular counter 1 (see Figure 4). To do this, it attaches the three parts of this locking device 10 to each other. More specifically, it introduces the hooks 205 of the cap 200 into the slots 153 of the platform 150 of said retaining cap 100. In doing so, the tabs 210 terminated by the teeth 211 of the cap 200 are snapped into the grooves 154 of the sliding ramp 155 of said platform 150, and the teeth 206 of the side walls 202 of said cap 200 are snapped into the horizontal grooves 156 of said platform 150. The tabs 320 of the nail 300 are then inserted into the slides of the cap 200 via the openings provided in the upper wall 203 of said cap 200, until the lower notches 321 of these tabs 320 meet the edges 209 of said openings. The nail 300 is in the unlocked position: its head 310 then rises above the passage duct 250, and its legs 320 extend through the slides of said cap 200 with their end set back from the slots 153 of the platform 150 , so that it allows the displacement of the cap 200 on the retaining cap 100 along the sliding direction X.

The installer brings back the locking device 10 pre-assembled on the upper face 23 of the housing 20 of the modular meter 1. To do this, as shown in FIG. 9, the cap 200 is placed in its free position, on the hood of holding 100, and said holding cover 100 spans the phase and neutral combs 50 so that the lower edge 106 of each of its side walls 102 is positioned above said phase and neutral combs 50. The correct positioning of the retaining cover 100 is ensured by the engagement of the pins 110, 160 in the empty housings 9A, 9B corresponding to the housing 20 of the modular meter 1, through the orifices 6A, 6B of the upper face 23 of said housing 20. By this engagement , part of the hooks 205 of the cap 200 is introduced through the corresponding orifices 6A, as far as the empty housings 9A of said housing 20.

As shown in FIG. 10, to hang the locking device 10 on the modular counter 1, the installer slides the cap 200 along the direction X, towards the front wall 101 of the retaining cover 100, from its free position towards its hanging position. Each hook 205 slides in the corresponding empty housing 9A as well as in the slot 153 of the platform 150 and the orifice 6A of said housing 20, so that the foot 205B of each hook 205 engages under the upper wall of the housing 20. The cap 200 is then in abutment against the retaining cap 100, and the installer is warned of the correct hooking position of said cap 200 by the sound produced when the ribs 207 of the cap 200 are snapped into the vertical grooves 157 of the cap. holding 100. The free ends of the legs 320 of the nail 300 are then located opposite two free spaces, above the slots 153 of the platform 150 and the orifices 6A which open into the empty housings 9A.

As shown in FIG. 11, the installer then presses on the head 310 of the nail 300 to release the hooking of the lower notches 321 of the tabs 320 of the nail 300 on the edges 209 of said openings of the cap 200. The tabs 320 of the nail 300 slide along direction Y, so that the free ends of said tabs 320 pass through the slots 153 and the orifices 6A to engage in the empty housings 9A. The nail 300 is then in the locked position and the upper notches 321 of said tabs 320 are hooked on the edges 209 of said openings of the cap 200. The free end of each tab 320 of the nail 300, adjacent to the rear face of one of the pins 160, thus stands between the edge of the corresponding slot 153 and the front face of the corresponding hook 205. The tabs 320 of the nail then block any movement of the hooks 205 in the corresponding empty housing 9A, in the slots 153 of the platform 150 and in the orifices 6A of the housing 20. Each hook 205 is therefore blocked, engaged under the upper wall of the housing 20. The phase and neutral combs 50 are thus connected and locked on the modular counter 1. In addition, the head 310 of the nail 300 is then located below the passage conduit 250, so that this passage conduit 250 is released for the introduction of the inextensible tamper-evident element.

Finally, as shown in FIG. 12, to secure the connection of the phase and neutral combs 50 on the modular counter 1 in a tamper-proof manner, the installer introduces the inextensible tamper-evident element 400 into the passage conduit 250 of the cap. 200. As explained above, the inextensible tamper-evident element 400 is sealed on itself by means of a weld (not shown). The inextensible tamper-evident element 400 then extends above the head 310 of the nail 300, through the place of movement of said nail 300, in the immediate vicinity of said head 310. More precisely, it extends at a distance such of said head 310 that it prevents reverse movement of the nail 300 towards its unlocked position. In other words, the distance between the inextensible tamper-evident element 400 threaded into the passage duct 250 and said head 310 is less than the displacement travel of said nail 300 between its locked position and its unlocked position. In practice, it is therefore here less than the distance separating said upper and lower notches 321 provided on each of the tabs 320 of the nail 300.

The electrical assembly 1000 thus secured in a tamper-proof manner guarantees a reliable and non-falsifiable statement of the energy consumed in the phase current line. This electrical set 1000 also complies with the standards in force (in particular the "MID" directives) so that it can be used for energy billing.

To unlock the connection of the phase and neutral combs 50 on the counter 1, it is necessary to destroy the inextensible tamper-evident element, for example by breaking the weld, in order to be able to remove it from the passage conduit 250. Advantageously, the disconnection of the phase and neutral combs 50 after the installation of the modular meter 1 on a row of the electrical box is therefore made visible.

Advantageously, there is provided here on the upper wall 203 of the cap 200, a notch 208 (see FIG. 6), in correspondence with a notch 308 provided on the underside of the head 310 of the nail 300, so that a space is left free between said upper wall 203 and said head 310 of the nail in the locked position (see FIG. 12). The installer can then insert the tip of a tool (such as a screwdriver) into this space and unlock the nail by releasing the cooperation between the nail 300 and the cap 200 by leveraging. The removal of the phase and neutral combs 50 is then done easily, according to steps reverse to those described above.

Claims (10)

1. Modular electricity meter (1) adapted to be supplied by at least one supply comb (50), said modular meter (1) comprising an insulating housing (20) of generally parallelepiped shape having two main lateral faces ( 22) opposite joined by a transverse upper face (23), in which said transverse upper face (23) comprises at least three openings (5A, 5B, 15) each giving access to a separate electrical terminal (7A, 7B, 17), a first and a second of these openings (5A, 5B) giving access to an electrical phase terminal (7A, 7B) and being arranged in a first row (R1) extending in a direction perpendicular to said main lateral faces (22) of the housing, the third of these openings (15) giving access to an electrical neutral terminal (17) and being arranged in a second row (R2) parallel to said first row (R1), in which it is further provided an insulating wall (40) which rises perpendicularly from said upper face (23) transverse in the space separating said first and second openings (5A, 5B), characterized in that said upper face (23) transverse comprises at least one blind hole (45) aligned with said third opening (15) on said second row (R2), the third opening (15) and said blind hole (45) being spaced so that they are adapted receiving a connection tooth (53) from a standardized supply comb (50), and in that said insulating wall (40) has a length such that it leaves free the space provided between said third opening (15 ) and said blind hole (45). 2. Modular counter (1) according to claim 1, in which the upper transverse face (23) comprises a second blind hole (45) aligned with said third opening (15) on said second row (R2), said third opening (15 ) and said blind holes (45) being spaced such that said third opening (15) and one of the two blind holes (45) are each adapted to receive a connection tooth (53) of said comb (50) standardized by 'food. 3. modular meter (1) according to one of claims 1 and 2, wherein the main lateral faces (22) of the housing (20) are spaced by a value equal to an integer multiple of a base width (M ) predetermined. 4. Modular counter (1) according to one of claims 1 to 3, in which said first, second and third openings (5A, 5B, 15) each belong to a separate pair of openings giving access to a double electrical terminal ( 7A, 7B, 17), the openings (5A, 5B) of the first and second of these pairs of openings being regularly spaced and all arranged on said first row (R1), and the openings (15) of the third of these pairs of openings being arranged on said second row (R2). 5. Electrical assembly (1000) comprising a modular counter (1) according to one of claims 1 to 4 and a locking device (10) of said comb (50) standardized supply in connection position on said modular counter (1 ), said locking device (10) comprising: - a fixed part (100) adapted to be linked to said comb (50) standardized supply, - a mobile part (200) mounted to move on said fixed part (100) and having a hooking position, and - a locking element (300) movably mounted on said movable part (200) between an unlocked position in which it allows the displacement of said movable part (200) relative to the fixed part (100), and a locked position in which it blocks said mobile part (200) in its hooking position, said mobile part (200) comprising a passage conduit (250) for an inextensible tamper-evident element (400), this passage conduit (250) extending across the place of movement of said locking element (300), the distance separating said locking element (300) in the locked position and said passage duct (250) being strictly less than the travel of said locking element (300) between its locked position and its unlocked position. 6. An electrical assembly (1000) according to claim 5, wherein said passage conduit (250) is formed by through holes (251), arranged opposite one another and having a common axis (Z) s extending through said displacement place of the locking element (300). 7. Electrical assembly (1000) according to one of claims 5 and 6, wherein said movable part (200) is adapted to slide between its hooking position and a free position in which it allows the withdrawal of the combs (50) standardized supply, and wherein said locking element (300) is movable in sliding in a direction (Y) perpendicular to the sliding direction (X) of said movable part (200), between its locked position where it s' interposes between said fixed part (100) and said movable part (200) and its unlocked position where it projects through said passage duct (250). 8. Electrical assembly (1000) according to one of claims 5 to 7, in which said fixed part (100) of the locking device (10) comprises a retaining cover (100) adapted to span said comb (50) standardized by power supply in connection position on said modular meter (1), said retaining cover (100) comprising a front wall (101) and a rear wall (104) joined by two side walls (102) including a lower edge (106 ) forms a stop element opposing the withdrawal of said comb (50), the front face (101 A) of said front wall (101) of said retaining cover (100) carrying a platform (150) for mounting said movable part (200). 9. An electrical assembly (1000) according to claim 8, wherein said retaining cover (100) of the locking device (10) comprises at least one pin (160) adapted to engage in an empty housing (9A) provided in the housing (20) of the modular counter (1), through an orifice (6A) provided in the upper transverse face (23) of said housing (20) to adjust the position of said retaining cover (100) on said housing ( 20), said pin (160) further forming a stop element for the movable part (200) of the locking device (10). 10. An electrical assembly (1000) according to claim 9, wherein said empty housing (9A) is further adapted to receive an attachment means (205) of the movable part (200) of the locking device (10) placed in hooking position and part of the locking element (300) placed in the locked position, this part being positioned between said pin (160) and said hooking means (205). 1/7 2/7 31C 32D 3/7