Electrical assembly comprising an integrated electromagnetic shielding component

Abstract

The invention relates to an electrical assembly housed in an electrical device, comprising: a first sub-assembly (1) comprising a first socket (11) and an active part (12); a second sub-assembly (2) comprising a second socket (21) and an electronic card (22); and a third sub-assembly (3) comprising a third socket (35), the second sub-assembly (2) attaching the third sub-assembly (3) and the first sub-assembly (1) attaching the second sub-assembly (2) to form an integral electrical assembly (100), the electrical assembly comprising a first housing (A) and a second housing (B), the first housing holding the electronic card (22) interposed between the third socket (35) and the second socket (21), the second housing (B) holding the active part (12) interposed between the second socket (21) and the first socket (11), wherein the housings (A, B) are delimited by walls (211, 212, 311, 150, 250) generating an electromagnetic shield belonging to the first socket (11), the second socket (21) and the third socket (35).

Description

TECHNICAL FIELD

[0001] The present invention relates to the field of electrical equipment, in particular high-voltage electrical equipment, and in particular inverters. The present invention more particularly relates to electrical assemblies in such electrical equipment comprising integrated electromagnetic shielding means. BACKGROUND

[0002] At the state of the art, it is known to assemble electrical devices, in particular inverters, for vehicle motor systems. In particular, such electrical devices comprise electronic cards (control cards, driver cards and filter cards), electrical conductor bars, capacitive elements and filtering devices, housed in a cell closed by a cover plate.

[0003] The electrical components in which the current flows, in particular with high power levels, generate magnetic fields that can interfere with the operation of other components. The operation of each of these components can be affected by such electromagnetic disturbances. Of course, it is necessary to reduce these disturbances.

[0004] Thus, it is known that such electrical devices must have a required electromagnetic compatibility performance. In other words, it is necessary to first ensure that the electrical device is able to operate without disturbances in its electromagnetic environment, and secondly that the electrical device is able to operate without causing electromagnetic disturbances that can compromise the required operation of other electrically proximately located electrical equipment.

[0005] For this purpose, it is known to include in such electrical equipment electromagnetic shielding support plates, in particular made of aluminum. Typically, the electronic cards are housed on the surface of said plates. In particular, such electromagnetic barrier support plates separate the electromagnetic power modules on one side from the electronic cards on the other side to control said electronic power modules.

[0006] This makes it possible to provide electromagnetic shielding that is resistant to the electromagnetic disturbances generated by the electronic power modules in the electronic control cards. However, this type of electrical equipment includes many other sources of electromagnetic disturbances that persist or are generated in particular in the area of the electrical busbars. At the state of the art, in order to ensure a required electromagnetic shielding, specific shielding elements are used, such as mechanical elements. Electromagnetic shielding is thus added in various points in the equipment to provide shielding for certain components.

[0007] However, the addition of such specific shielding elements is not desirable, in particular since this involves more operations in the manufacture of such electrical devices.

[0008] The object of the present invention is therefore to propose an electrical device structure that itself comprises electromagnetic shielding elements, by means of structural features of the elements that make up such an electrical device. SUMMARY

[0009] For this purpose, it is an object of the present invention an electrical assembly intended to be installed in an electrical device, wherein said electrical assembly comprises: a first sub-assembly comprising a first socket and an active part; a second sub-assembly comprising a second socket and an electronic card configured to control said active part, wherein said electronic card is installed on said second socket; and a third sub-assembly comprising a third socket, wherein said second sub-assembly is attached to the third sub-assembly and the first sub-assembly is attached to the second sub-assembly so as to form an integral electrical assembly, wherein said assembly comprises a first housing holding the electronic card interposed between the third socket and the second socket, and a second housing holding the active part interposed between the second socket and the first socket, wherein said housings are delimited by walls that generate electromagnetic shielding, wherein said walls belong to the first socket, the second socket and the third socket.

[0010] According to one embodiment, at least one of said sockets comprises a tray, and at least one wall extends orthogonally towards the nearest socket, thereby at least partially delimiting one of said housings.

[0011] According to one embodiment, the second socket comprises at least one first low wall extending orthogonally from a second tray of the second socket towards the first socket, to provide electromagnetic shielding for the second housing.

[0012] According to one embodiment, the third socket comprises at least one second low wall extending orthogonally from a third tray of the third socket towards a lower surface of the second tray of the second socket, to provide electromagnetic shielding for the first housing.

[0013] According to one embodiment, at least one of said housings is at least partially delimited by walls extending from adjacent sockets, said adjacent sockets thus facing each other in a direction orthogonal to the two walls.

[0014] According to one embodiment, the first socket has a first peripheral rib disposed in a lower surface of a first tray of said first socket, said first peripheral rib extending towards the second socket and being positioned behind at least one first low wall with respect to an edge of the second tray, such that said first peripheral rib is positioned opposite at least one portion of at least one first low wall, wherein a height of said at least one first peripheral rib is greater than a distance between said portion of at least one first low wall and an internal surface of the first tray.

[0015] According to one embodiment, the second socket has a second peripheral rib disposed in a lower surface of the second tray, said second peripheral rib extending towards the third socket and being positioned behind at least one second low wall relative to the edge of the second tray, such that said second peripheral rib is positioned opposite at least one portion of the at least one second low wall, wherein the height of said second peripheral rib is greater than the distance between said portion of the at least one second low wall and the inner surface of the second tray.

[0016] According to one embodiment, the second socket comprises at least one third low wall extending from the second tray towards the third socket, to facilitate electromagnetic shielding of the first enclosure.

[0017] According to one embodiment, the at least one second low wall and the at least one third low wall are positioned in staggered rows.

[0018] According to one embodiment, the at least one second low wall and the at least one third low wall comprise overlapping portions.

[0019] According to one embodiment, the first sub-assembly comprises at least one first electrical conductor rod intended to connect said active portion to an electrical device, wherein said active portion and said first electrical conductor rod are disposed on said first socket.

[0020] According to one embodiment, the third sub-assembly comprises a second electrical conductor rod, wherein said second electrical conductor rod is disposed on said third socket, and wherein said at least one first low wall is interposed between the active portion and the second electrical conductor rod.

[0021] According to one embodiment, said third socket forms a cover plate of a housing of an electrical device.

[0022] According to one embodiment, the electrical assembly comprises a housing delimiting a cavity and comprising an aperture, and the electrical assembly comprises a first sub-assembly, a second sub-assembly and a third sub-assembly, and is positioned in said cavity such that the third socket closes said aperture of said housing, thereby forming a cover plate of an electrical device.

[0023] Another object of the application is an electrical power system comprising a first electrical device as briefly described above, wherein the housing of the first electrical device comprises a second cavity housing a second electrical device.

[0024] According to one embodiment, the first electrical device forms an inverter and the second electrical device forms an electric motor intended to be controlled by said inverter. BRIEF DESCRIPTION OF DRAWINGS

[0025] The application will be better understood on reading the following description, given solely as an example, and on examining the appended drawings that are given as non-limiting examples and in which:

[0026] FIG. 1A represents a first electrical device sub-assembly according to one example of the application.

[0027] FIG. 1B represents a second electrical device sub-assembly according to one example of the application.

[0028] FIG. 1C represents a third electrical device sub-assembly according to one example of the application.

[0029] FIG. 2 illustrates an assembled electrical device according to one example of the application.

[0030] FIG. 3 shows an electromagnetic barrier in an electrical assembly formed by low walls and ribs disposed on stacked receptacles according to one example of the application.

[0031] FIG. 4 illustrates an arrangement of staggered rows with low walls derived from stacked receptacles in an electrical assembly according to one example of the application.

[0032] FIG. 5 shows an electromagnetic barrier in an electrical assembly formed by an overlap between low walls formed on stacked receptacles according to one example of the application.

[0033] It should be noted that the figures explain the application in detail in order to implement the application and, if applicable, said figures can of course be used to improve the definition of the application. DETAILED DESCRIPTION

[0034] In the description that will be given hereafter, the application will be described mainly for the purpose of generating an inverter, intended in particular to power a rotating electric machine of a motor system of a vehicle. However, another object of the application is all compatible electrical devices of the structure formed by the three sub-assemblies described hereafter.

[0035] Referring to FIGS. 1A-1C , the three sub-assemblies 1, 2, 3 represented as illustrations form an electrical assembly according to one example of the application.

[0036] FIG. 1A shows a first sub-assembly 1 comprising a first receptacle with a first cradle 110, in particular a cooling module 11 according to the example represented, to which a part 12 of the electrical device is adhered. The cooling module 11 can be an active module comprising a network of cooling liquid flowing through it, for example a water box. In particular, the active part 12 can comprise an electronic power module of an inverter.

[0037] An electronic power module is in particular an assembly comprising a plurality of semiconductor chips forming an enclosed circuit in a same housing. In particular, in the present document, an electronic power module can be an assembly comprising components through which energy is transferred for powering an electric machine, such as an electric motor system, wherein the components are in particular intended to convert direct current into alternating current, or vice versa. Such an electronic power module is configured to enable a controlled passage of electrical energy between a high voltage power cell and the electric machine.

[0038] The first sub-assembly 1 can also comprise stabilizing means 13 to stabilize the signal, in particular the voltage, supplied to the active part 12. In particular, the stabilizing means 13 is a DC link capacitor. The filtering means 13 are for example screwed to the cooling module 11 to which the active device 12 is adhered.

[0039] The first sub-assembly 1 can also comprise a first electrical conductor bar 14, also called "busbar". In particular, the electrical assembly can be a sub-assembly of an inverter for powering a multi-phase electric motor. In this case, the active part 12 is an electronic power module, as explained above, and such a first electrical conductor bar 14 connected to the electronic power module is configured to accommodate a phase connector of the electric motor system in order to provide energy to the electric motor system. The expression "AC busbar" is thus used to refer to the first electrical conductor bar 14.

[0040] FIG. 1B A second sub-assembly 2 comprising a second socket 21 is shown. In particular, an electronic card 22 is adhered, in particular screwed, to the second socket 21. The electronic card 22 can be an electronic card for controlling the inverter, and in particular the electronic power module 12. In particular, this part of the second sub-assembly 2 comprising the electronic card 22 is a low voltage part of the electrical device.

[0041] In particular, the second socket 21 acts as an electromagnetic shield, in particular to protect the electronic card 22 from the electromagnetic environment of which it is, in particular of the electronic power module 12. The second socket 21 is for example a casting composed of a material capable of acting as a barrier against electromagnetic disturbances. The second socket 21 is for example made of aluminum.

[0042] According to the invention, the second socket 21 comprises a second planar cradle 210 from which a low wall 211, a low wall 212 can extend, and a second peripheral rib can be formed in, wherein after the sub-assembly has been assembled as described below in this document, the second rib and the low walls are positioned to improve the electromagnetic shielding of the electrical assembly, as will be described in detail below. In particular, the electronic card 22 is seated on the cradle 210.

[0043] FIG. 1CA third sub-assembly 3 is shown comprising a third socket 35 with a third carrier 310, wherein said third socket 35 is for example intended to act as a cover plate for electrical devices. The third sub-assembly 3 can also comprise a second electrical conductor bar 30 adhered, for example screwed, to said third socket 35.

[0044] By way of example, the second electrical conductor bar 30 can comprise an electrical conductor 300, also called a "lead frame", through which an electrical power signal is transmitted. The signal, in particular the power signal, transmitted through said electrical conductor is for example a voltage delivered by a high voltage power cell.

[0045] The second electrical conductor bar 30 can comprise elements for filtering said power signal, namely in the example represented at least one electromagnetic filtering ring 302, an electromagnetic filtering ring 303 and at least one discharge capacitor 304, 305. The filtering elements filter said power signal if the second electrical conductor bar 30 receives a power signal delivered by a high voltage power cell.

[0046] The second electrical conductor bar 30 can also comprise a fuse 301 to stop the conduction of the power signal in case of failure. The third socket 35 can also comprise electrical connectors 351, 352.

[0047] The third socket 35 can comprise at least one second low wall 311 extending orthogonally to the third carrier 310. This at least one third low wall 311 contributes to the electromagnetic shielding of the electrical assembly, as will be described in detail below.

[0048] As FIG. 2 The first sub-assembly 1, the second sub-assembly 2 and the third sub-assembly 3 are stacked and attached to each other, as represented in the middle. In particular, the third sub-assembly 3 houses the second sub-assembly 2, which houses the first sub-assembly 1.

[0049] More particularly, the second socket 21 is attached to the third socket 35. For this purpose, in particular the at least one second low wall 211 extending from the third socket 35 to the second socket comprises a cylinder 355 in which a screw is screwed to attach the second socket 21 to the third socket 35.

[0050] In a similar manner, the first socket 11 is attached to the second socket 21, for example by means of a screw screwed in a cylinder 255 formed in the at least one first low wall 211 extending from the second socket 21 to the first socket 11.

[0051] With reference to FIG. 2This positioning makes it possible to form a first housing A and a second housing B. In particular, said first housing A and second housing B comprise electronic components. The first housing A can in particular comprise at least one electronic control card 22. The second housing B can comprise an electronic power module 12. Said electronic control card 22 and said electronic control module 12 are thus positioned on either side of the second socket 21. In particular, the electronic control card 22 is attached to the second socket 21 so that said electronic control card 22 is positioned on the side of the third socket 35 and the electronic power module 12 is attached to the first socket 11 so that said electronic power module 12 is positioned on the side of the second socket 21.

[0052] In order to improve the electromagnetic compatibility performance, it is necessary to protect the electrical device (and in particular the electronic card 22) from electromagnetic disturbances coming from the active part 12, from the electrical conductor bar 14, the electrical conductor bar 30 or from the environment of said electrical assembly, in particular caused by other electrical devices intended to be operated in close proximity.

[0053] To this end, the second socket 21 comprises in particular FIG. 1B 、 FIG. 2 、 FIG. 3 、 FIG. 4 and FIG. 5 at least one low wall 211 extending from the second bracket 210 of the second socket 21, as represented in Figure 2, to facilitate the electromagnetic shielding of the second housing B.

[0054] According to one embodiment, at least one third low wall 212 extends from the second bracket 210 of the second socket 21 in a direction opposite to the direction in which the at least one low wall 211 extends. The at least one low wall 211 thus extends towards the cooling module (first socket) 11 and the at least one third low wall 212 extends towards the cover plate (third socket) 35.

[0055] Thus, for example, the electronic card 22 is stuck on one side of the second socket 21 and is thus located in the first housing A. In this case, the at least one first low wall 211 extends orthogonally to the second bracket 210 in a direction opposite to the side on which the electronic card 22 is positioned; the at least one second low wall 212 extends orthogonally to the second bracket 210 on the side on which the electronic card 22 is positioned.

[0056] The at least one first low wall 210 thus facilitates the electromagnetic shielding of the second housing B and the at least one third low wall 212 facilitates the electromagnetic shielding of the first housing A.

[0057] As FIG. 1C 、 FIG. 2 、 FIG. 3 、 FIG. 4 and FIG. 5As represented in Figure 2, at least one second low wall 311 extends from the third seat 35 of the third ledge 310 towards the second seat 21.

[0058] The at least one first low wall 211 and the at least one second low wall 311 are positioned to provide electronic shielding for the components present in said second housing B and first housing A, respectively.

[0059] According to FIG. 3 According to one embodiment represented in Figure 2, the at least one second low wall 311 extends from the third seat 35 cooperating with a second peripheral rib 250 formed by the lower surface of the second ledge 210 of the second seat 21, in other words on the side of the second ledge 210 opposite the third seat 35.

[0060] The at least one second low wall 311 extending from the third seat 35 is extended so as to be in contact or close proximity with the lower surface of the second ledge 210 of the second seat 21. Said second peripheral rib 250 and said at least one second low wall 311 are positioned so as to form a meander which resists electromagnetic fields coming from the outside and which seek to penetrate the first housing A, and vice versa.

[0061] The second peripheral rib 250 placed on the lower surface of the second ledge 210 of the second seat 21 is thus configured so as to be positioned in close retreat from the at least one third low wall 311 with respect to the edge of the second ledge 210, so as to prevent any propagation of electromagnetic disturbances inside the first housing A.

[0062] Indeed, as represented in Figure 2, the path of access to the inside of the first housing A forms a meander so that the electromagnetic fields outside the first housing A cannot penetrate to the inside thereof, and vice versa. FIG. 3

[0063] Thus, even if there is a space between the at least one second low wall 311 and the lower surface of the second ledge 210, the presence of the second peripheral rib 250 in retreat makes it possible to prevent the propagation of electromagnetic disturbances from the first housing A or the propagation of electromagnetic disturbances to said first housing A. This makes it possible to correct any surface defects of the lower surface of the second ledge 210 of the second seat 21. For this purpose, the second peripheral rib 250 extends from the lower surface of the second seat 21 towards the third seat 35, in slight retreat with respect to the at least one second low wall 311 extending from the third seat 35 towards the second seat 21, and the height of said second peripheral rib 250 is greater than the distance between the at least one second low wall 311 and said lower surface of the second ledge 210 of the second seat 21.

[0064] ​In the represented example, the cover plate (third socket) 35 of the electrical device thus comprises at least one second low wall 311 raised towards the second socket 21. Said second socket 21 comprises a second peripheral rib 250 extending from the lower surface of the second cradle 210 towards the cover plate 35, slightly set back with respect to said at least one second low wall 311, configured to reach the lower surface of the second socket 21 or at a smaller distance than the height of said second peripheral rib 250.

[0065] In a similar manner, the electromagnetic shielding of the second enclosure B is provided by at least one first low wall 211 extending from the second socket 21 to the first socket 11, wherein according to one embodiment, said at least one first low wall 211 cooperates with a first peripheral rib 150 formed by the lower surface of the first cradle 110 of the first socket 11, wherein said first peripheral rib 150 extends towards the second socket 21.

[0066] The at least one first low wall 211 extending from the second socket 35 is extended so as to be in contact or close proximity with the lower surface of the first cradle 110 of the first socket 11. Said first peripheral rib 150 and said at least one first low wall 211 are positioned so as to form a meander which resists electromagnetic fields coming from the outside and trying to penetrate the second enclosure B and vice versa.

[0067] The first peripheral rib 150 resting on the lower surface of the first cradle 110 of the first socket 11 is thus configured so that it is positioned closely set back with respect to the edge of the first cradle 110 from the at least one first low wall 211, so as to prevent any spreading of electromagnetic disturbances inside the second enclosure B.

[0068] Indeed, similarly to the figure of FIG. 3 the path of access to the inside of the second enclosure B forms a meander so that electromagnetic fields outside the second enclosure B cannot penetrate to its inside and vice versa.

[0069] Thus, even if there is a space between the at least one first low wall 211 and the lower surface of the first cradle 110, the presence of the set back first peripheral rib 150 makes it possible to prevent the spreading of electromagnetic disturbances from the second enclosure B or the spreading of electromagnetic disturbances to said second enclosure B. This makes it possible to correct any surface defects of the lower surface of the first cradle 110 of the first socket 11. For this purpose, the first peripheral rib 150 extends from the lower surface of the first cradle 110 of the first socket 11 towards the second socket 21, which is slightly set back with respect to said at least one first low wall 211 extending from the second socket 21 towards the first socket 11, and the height of said first peripheral rib 150 is greater than the distance between said at least one first low wall 211 and said lower surface of the first cradle 110 of the first socket 11.

[0070] In the represented example, the second socket 21 of the electrical assembly thus comprises at least one first low wall 211 raised towards the cooling module (first socket) 11. Said cooling module 11 can comprise a first peripheral rib 150 from the lower surface of the first bracket 110 towards the second socket 21, which is slightly set back with respect to said at least one first low wall 211, said first low wall 211 being configured to reach the lower surface of the cooling module 11 or at a smaller distance than the height of said first peripheral rib 150.

[0071] As FIG. 4 indicated in

[0072] Furthermore, according to one embodiment, as FIG. 5 indicated in

[0073] In other words, an overlapping portion between the third low wall 212 of the second socket 21 and the second low wall 311 of the third socket 35 can be designed, wherein said second socket 21 and third socket 35 are stacked. For example, the at least one second low wall 311 extending from the third socket 35 can have a Z-shaped portion configured so that a portion of said portion of the at least one second low wall 311 is placed with respect to the third low wall 212 extending from the second socket 21, in other words, it has a shape with an alignment discontinuity, and thus creates said overlap.

[0074] It should be noted that an aperture can be formed in the low walls to allow passage of equipment, such as an electrical wire or a connector.

[0075] It is also possible for at least one portion of the at least one second low wall to extend beyond the second bracket of the second socket to facilitate electromagnetic shielding of the second enclosure.

[0076] Also according to the objective of improving electromagnetic compatibility, according to one embodiment, there is preferably no through cylinder connecting said three sub-assemblies 1, 2, 3. Thus, on the one hand, a cylinder enables the second sub-assembly 2 to be attached to the third sub-assembly 3, and the other cylinder enables the first sub-assembly 1 to be attached to the second sub-assembly 2. The absence of a through cylinder from the first sub-assembly 1 to the second sub-assembly 2 passing through (precisely) the second socket 21 belonging to the third sub-assembly 3 makes it possible to minimize the spread of the magnetic field from the active part 12 to the second electrical conductor rod 30, which is a source of electromagnetic disturbance, and vice versa.

Claims

1. An electrical assembly configured to be disposed in an electrical device, wherein the electrical assembly comprises: a first sub-assembly (1) comprising a first socket (11) and an active part (12); a second sub-assembly (2) comprising a second socket (21) and an electronic card (22) configured to control the active part (12), wherein the electronic card (22) is disposed on the second socket (21); and a third sub-assembly (3) comprising a third socket (35), wherein the second sub-assembly (2) is attached to the third sub-assembly (3) and the first sub-assembly (1) is attached to the second sub-assembly (2) so as to form an integrated electrical assembly (100), wherein the electrical assembly comprises a first housing (A) holding the electronic card (22) interposed between the third socket (35) and the second socket (21), and a second housing (B) holding the active part (12) interposed between the second socket (21) and the first socket (11), wherein the first housing (A) and the second housing (B) are delimited by walls (211, 212, 311, 150, 250) generating electromagnetic shielding, wherein the walls belong to the first socket (11), the second socket (21) and the third socket (35), wherein at least one of the second socket (21) and the third socket (35) comprises a second ledge (210) and a third ledge (310), wherein at least one wall (211, 311) extends orthogonally towards the nearest socket, thereby at least partially delimiting one of the first housing (A) and the second housing (B), wherein the second socket (21) comprises at least one third low wall (212) extending from the second ledge (210) towards the third socket (35) to facilitate the electromagnetic shielding of the first housing (A), wherein the third socket (35) comprises at least one second low wall (311) extending orthogonally from the third ledge (310) of the third socket (35) towards a lower surface of the second ledge (210) of the second socket (21) to provide electromagnetic shielding for the first housing (A), and wherein the at least one second low wall (311) and the at least one third low wall (212) are positioned in staggered rows.

2. The electrical assembly configured to be disposed in an electrical device according to claim 1, wherein the second socket (21) comprises at least one first low wall (211) extending orthogonally from the second ledge (210) of the second socket (21) towards the first socket (11) to provide electromagnetic shielding for the second housing (B).

3. The electrical assembly configured to be disposed in an electrical device according to claim 1, wherein at least one of the first housing (A) and the second housing (B) is at least partially delimited by walls extending from adjacent sockets, which are thus facing each other in a direction orthogonal to the two walls. ​ 4. The electrical assembly configured to be disposed in an electrical device according to claim 3, wherein the first socket (11) has a first peripheral rib (150) disposed in a lower surface of the first cradle of the first socket (11), the first peripheral rib (150) extending towards the second socket (21) and positioned behind the at least one first low wall (211) relative to an edge of the second cradle (210) such that the first peripheral rib (150) is positioned opposite at least one portion of the at least one first low wall (211), wherein a height of the at least one first peripheral rib (150) is greater than a distance between the portion of the at least one first low wall (211) and an inner surface of the first cradle (110).

5. The electrical assembly configured to be disposed in an electrical device according to claim 3, wherein the second socket (21) has a second peripheral rib (250) disposed in a lower surface of the second cradle (210), the second peripheral rib (250) extending towards the third socket (35) and positioned behind the at least one second low wall (311) relative to an edge of the second cradle (210) such that the second peripheral rib (250) is positioned opposite at least one portion of the at least one second low wall (311), wherein a height of the at least one second peripheral rib (250) is greater than a distance between the portion of the at least one second low wall (311) and an inner surface of the second cradle (210).

6. The electrical assembly configured to be disposed in an electrical device according to claim 1, wherein the at least one second low wall (311) and the at least one third low wall (212) comprise overlapping portions.

7. The electrical assembly configured to be disposed in an electrical device according to claim 1, wherein the first sub-assembly (1) comprises a first electrical conductor rod (14) intended to connect the active portion (12) to at least one first terminal of the electrical device, wherein the active portion (12) and the first electrical conductor rod (14) are disposed on the first socket (11).

8. The electrical assembly configured to be disposed in an electrical device according to claim 2, wherein the third sub-assembly (3) comprises a second electrical conductor rod (30), wherein the second electrical conductor rod (30) is disposed on the third socket (35), and wherein the at least one first low wall (211) is interposed between the active portion (12) and the second electrical conductor rod (30).

9. The electrical assembly configured to be disposed in an electrical device according to claim 1, wherein the third socket (35) forms a cover plate of a housing of an electrical device.

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