EARTH ELEMENT FOR A BUSBAR MODULE"

TECHNICAL FIELD OF THE INVENTION

The present invention relates to an earth element for a busbar module.

The invention also relates to the use of an earth element for a busbar module for at least partial earthing at least one busbar module.

The present invention also relates to a device for earthing a busbar module and to a busbar module.

The present invention also relates to a process for making a device for earthing a busbar module.

The present invention also relates to a busbar module.

Some definitions are given below, useful to understand the present invention.

In the context of the present description, an earth element means an element configured for earthing a busbar module.

In the context of the present description, "earthing" means the operation of electrically earthing a component, such as a busbar module. Electrical earthing can also be generically defined as the set of actions, systems and/or means aimed to bring a component (preferably metal) to the electric potential of the ground.

In the context of the present description, a busbar module is a module provided with a box-shaped body, conductive bars arranged inside the box-shaped body and at least one earth element engaged to the box shaped body, preferably at one end of the box-shaped body.

PRIOR ART

Panels for earthing busbar modules are known.

Busbar modules are usually provided with a box-shaped body, conductive bars arranged inside the box shaped body and two pairs of panels. Each pair of panels is engaged frontally to the box-shaped body at a respective end of the box-shaped body. The panels laterally surround the conductive bars projecting outside the box-shaped body at the respective end of the box-shaped body. The panels are usually interposed between adjacent busbar modules and allow the busbar modules to be earthed.

In order to engage the panels with the box-shaped body of the busbar module, the prior art provides for the use of threaded connections. Basically, each panel is engaged to a respective side wall of the box-shaped body of the busbar module by screws.

The known panels also provide one or more through holes which allow the housing of as many screws.

According to the technical solution of the prior art, the screws are therefore responsible for the mechanical engagement between the panel and the box-shaped body and at the same time allow electrical continuity between the box-shaped body of the busbar module and the panel. Electrical continuity is necessary for earthing the busbar modules. The known panels for earthing busbar modules and the known methods of threaded engagement between panels and the box-shaped body of the busbar module have drawbacks and can be improved in several respects.

In the first place, the through holes that allow the housing of the screws structurally weaken the panel and involve waste.

Secondly, the screws constitute a mechanical connecting means which is not entirely reliable, since they do not have an optimal structural strength adapted to guarantee a firm and lasting engagement between the panel and the box-shaped body. For example, the screw does not have an optimal shear strength, i.e. a stress in the plane orthogonal to the main axis along which the screw extends.

Moreover, the screws constitute a removable mechanical connecting means which by its very nature can be subject to a loosening of the tightening torque. The undesired loosening of the tightening torque of the screws leads to a worsening of the mechanical performance of each screw and can even cause a detachment of the screw from the panel and/or from the box-shaped body of the busbar module.

Furthermore, in the event of loosening, damage, weakening or breakage of the screws connecting each panel to the respective box-shaped body, the electrical continuity between the box-shaped body and panel, and therefore the earthing of the busbar module, are affected; this can cause serious damage to the electrical system in which the busbar modules are installed, such as short circuits and fire hazards.

In particular, in the case of breakage of the screws, the aforementioned electrical continuity can be completely interrupted and therefore the earthing of the busbar module is also interrupted.

Damage, weakening and/or breakage of the screws also involves the interruption of the mechanical connection between the panel and the box-shaped body and consequently also causes a significant structural damage to the busbar module.

The consequences of loosening, damaging, weakening or breaking the screws are particularly burdensome even in terms of plant costs and downtime. In fact, the loosening, damage, weakening or breakage of the screws entails a downtime of the plant, whose duration depends on the extent of the intervention to be carried out, and also implies the relative maintenance and/or replacement of the components, necessary to restore the functionality of the busbar modules.

OBJECTS OF THE INVENTION

The main object of the present invention is to provide an earth element for a busbar module capable of overcoming one or more of the drawbacks described above in relation to the prior art.

An additional object of the present invention is to provide an earth element for a busbar module capable of making the connection between the box-shaped body of the busbar module and the earth element itself stabler and safer.

The object of the present invention is also to provide an earth element for a busbar module capable of ensuring better continuity or electrical connection between the box-shaped body and the earth element itself and between adjacent busbar modules. An additional object of the present invention is to provide an earth element for a busbar module for at least partial earthing of at least one busbar module that allows earthing at least one busbar module in safety and in an efficient and effective manner.

It is also an object of the present invention to provide an earthing device for a busbar module, a busbar module and an earthing assembly for at least one busbar module configured to provide a more stable engagement between the earth element and box-shaped body and at the same time a better and more efficient earthing of the busbar module.

Another object of the present invention is to provide a process for making a device for earthing a busbar module that allows a stable and long-lasting engagement between the earth element and the box-shaped body, suitable for ensuring the necessary electrical continuity for an efficient and safe earthing of the busbar module.

An additional object of the present invention is to provide a process for making an earth element for a busbar module which is rational, simple, effective and capable of minimizing waste.

An additional object of the present invention is to provide an assembly process for a busbar module which is rational, simple, effective.

The aforementioned and other objects are achieved by an earth element for a busbar module, by a use of an earth element for a busbar module, by a process for making an earth element for a busbar module, by a device for earthing a busbar module, by a process for making a device for earthing a busbar module, by using a device for earthing a busbar module, by an assembly for earthing at least one busbar module, by use of an assembly for earthing at least one busbar module, by a busbar module and by an assembly process of a busbar module according to the appended claims and/or to the following aspects, which can be taken independently of each other or in combination with any of the following aspects or in combination with the individual technical features described in a detailed description or in combination with any of the appended claims.

SUMMARY

In a first aspect, the invention relates to an earth element for a busbar module.

In one aspect, the earth element comprises a continuity portion intended to be placed in connection with a further earth element of a further busbar module to provide electrical continuity with said further earth element of said further busbar module.

In one aspect, the earth element comprises a constraining portion extending from the opposite side with respect to said continuity portion with reference to a development direction of said earth element and configured to be engaged to a side wall a box-shaped body of said busbar module.

In one aspect, an earth element means an element configured for earthing a busbar module.

In one aspect, "earthing" means the operation of electrically earthing a component, such as a busbar module. In one aspect, electrical earthing is defined as the set of actions, systems and/or means aimed to bring a component (preferably metal), such as a busbar module, to the electric potential of the ground. In one aspect, a busbar module is a module provided with a box-shaped body, conductive bars arranged inside the box-shaped body and at least one earth element engaged to the box-shaped body, preferably at one end of the box-shaped body.

In one aspect), the earth element is configured, in an operative condition in which it is permanently engaged in said side wall of said box-shaped body of said busbar module through said constraining portion and is at least partially placed in connection with a further earth element of a further busbar module through said continuity portion, to allow at least partially the earthing of said busbar module(s).

In one aspect, the earth element comprises a wall interposed between the continuity portion and the constraining portion with reference to a development direction of said earth element.

In one aspect, said wall develops transversely, in particular at least partially orthogonally, to the continuity portion and/or to the constraining portion,

In one aspect, the constraining portion protrudes from said wall on the opposite side with respect to said continuity portion.

In one aspect, the invention relates to an earth element for a busbar module comprising a constraining portion configured to be coupled in a non-removable manner to a box-shaped body of a busbar module, in particular at a side wall thereof.

In one aspect, the invention relates to an earth element for a busbar module provided with a constraining portion configured to be inserted at least partially, preferably by sliding insertion, in a box-shaped body of a busbar module, in particular at a side wall thereof.

In one aspect, the invention relates to an earth element for a busbar module comprising a constraining portion configured to be coupled to a box-shaped body of a busbar module, in particular at a side wall thereof, without the use of connecting means, in particular without using threaded or riveted connecting means or rivets.

In one aspect, the constraining portion is configured to be at least partially inserted in a seat of said side wall of said box-shaped body of said busbar module.

In one aspect, the constraining portion is configured to be at least partially inserted inside the box-shaped body, for example at a seat defined on a side wall of the box-shaped body.

In one aspect, said seat of said side wall comprises a groove.

In one aspect, the constraining portion comprises a substantially flat wall.

In one aspect, the constraining portion comprises an at least partially or predominantly flat wall.

In one aspect, the side wall of the box-shaped body at a portion intended to be coupled to the constraining portion of the earth element is substantially flat.

In one aspect, the side wall of the box-shaped body at a portion destined to be coupled to the constraining portion of the earth element is at least partially or predominantly flat.

In one aspect, the side wall and the constraining portion are at least partially shaped at respective contact portions or surfaces destined to come into contact with each other.

Advantageously, the side wall and constraining portion counter-shaping ensures contact between them on an extended contact surface and therefore ensures optimal electrical continuity. In one aspect, said substantially flat wall is configured to be slidingly inserted in a seat or groove of said side wall of said box-shaped body of said busbar module.

In one aspect, the constraining portion has a substantially flat contact surface.

In one aspect, the contact surface is destined to at least partially come into contact with a side wall of a box shaped body of a busbar module.

In one aspect, the contact surface is configured to allow electrical continuity between the earth element and the side wall of the box-shaped body to which the earth element is engaged.

In one aspect, the contact surface is configured to place or bring the earth element and the side wall of the box-shaped body to which the earth element is engaged to the same electrical potential, preferably to the earth potential.

Advantageously, the contact surface ensures the contact and therefore the electrical continuity between the earth element and the box-shaped body at an extended contact surface and not as in the prior art exclusively at single points (where the screws that engage the earth element to the side wall of the box -shaped body are arranged). In this way, since the contact surface between the earth element and the box-shaped body is more extended with respect to the accurate contact surface of the prior art, the earth element according to the invention ensures better and more efficient electrical continuity between earth element and box-shaped body. In one aspect, the contact surface is at least partially or predominantly flat.

In one aspect, the constraining portion is configured to be engaged in contact with said side wall of said box shaped body at said contact surface.

In one aspect, the constraining portion has a substantially flat contact surface.

In one aspect, the constraining portion is configured and/or shaped and/or destined to be engaged or arranged in contact with said side wall at said contact surface.

In one aspect, the constraining portion extends along a main development direction of the earth element by a length equal to at least one centimeter and/or at least two centimeters and/or at least five centimeters and/or at least ten centimeters and/or at least twenty centimeters.

In one aspect, the constraining portion develops along a main development direction of the earth element by a length equal to at least one tenth, or at least one eighth, or at least one sixth, or at least one quarter, or at least one half of an overall extension of the earth element, the overall extension of the earth element being defined along said main development direction.

In one aspect, the constraining portion is made of electrically conductive material.

In one aspect, the constraining portion is made of sheet material, in particular sheet metal.

In one aspect, the constraining portion is made of metal material.

In one aspect, the constraining portion is made of plastically deformable material.

In one aspect, the constraining portion is made of a material plastically deformable by clinching or crimping.

In the context of the present description, clinching means substantially a process of cold plastic deformation of materials. Clinching is basically carried out without the use of any electrical equipment, thermal shocks or rivets. Clinching allows the "sewing" of two materials, even different ones, through the use of special cold welders configured to create a pressure, in particular through compressed air, such as to penetrate like a punch in the matrix and create a button that serves as a junction for the same. The result, corresponding precisely to a cold welding, is an excellent and remarkable lasting joint between the aforementioned materials. In the context of the present description, crimping means substantially a process of plastic deformation whereby two parts or components are joined by modifying the edge of one in order to adhere to the other. Crimping may be cold.

In one aspect, the constraining portion is configured to be plastically deformed to be engaged in a non removable manner to said side wall of said box-shaped body of said busbar module.

In one aspect, the constraining portion and the side wall of the box-shaped body are made of a material plastically deformable by clinching or crimping.

In one aspect, the constraining portion develops seamlessly with respect to said wall.

In one aspect, the constraining portion emerges orthogonally with respect to said wall.

In one aspect, the continuity portion develops seamlessly with respect to said wall.

In one aspect, the constraining portion and the continuity portion protrude from opposite surfaces of said wall.

In one aspect, the continuity portion is made of electrically conductive material.

In one aspect, the continuity portion is made of sheet material, in particular sheet metal.

In one aspect, the continuity portion is made of metal material.

In one aspect, the earth element comprises a transition portion interposed between the wall and the continuity portion, the transition portion developing seamlessly with respect to said wall and the continuity portion developing seamlessly with respect to said transition portion.

In one aspect, the continuity portion develops transversely with respect to said transition portion.

In one aspect, the transition portion is at least partially transverse to the wall and/or to the continuity portion.

In one aspect, the transition portion defines an acute angle with the wall, preferably an acute angle and a conjugate angle with respect to said acute angle.

In one aspect, the transition portion defines with the continuity portion at least one obtuse angle, preferably an obtuse angle and a conjugate angle with respect to said obtuse angle.

In one aspect, the transition portion comprises a first fitting seamlessly joining the transition portion to the wall. In one aspect, the transition portion comprises a second fitting seamlessly joining the transition portion to the continuity portion.

In one aspect, the transition portion comprises an intermediate stretch joining the first fitting to the second fitting.

In one aspect, the intermediate stretch seamlessly develops between the first fitting and the second fitting.

In one aspect, with reference to a sectioning plane transverse to the transition portion, the intermediate stretch is substantially straight.

In one aspect, with reference to a sectioning plane transverse to the transition portion, the first fitting and the second fitting are at least partially curved. In one aspect, the earth element comprises a first end, a second end opposite with respect to said first end with reference to a development direction of said earth element and a central portion interposed between said first end and said second end.

In one aspect, the constraining portion develops at the first end.

In one aspect, the continuity portion develops at the second end.

In one aspect, said wall develops at the central portion and is interposed between the constraining portion and the continuity portion.

In one aspect, said transition portion develops at the central portion and is interposed between the constraining portion and the continuity portion.

In one aspect, the transition portion is interposed between the wall and the continuity portion.

In one aspect, the earth element comprises a recess configured to facilitate a mutual positioning and mounting of a plate of a junction block for busbar modules with respect to said earth element.

In one aspect, a junction block or junction box means a member configured to join contiguous busbar modules, mechanically and/or electrically.

In one aspect, the recess protrudes from said continuity portion, preferably in the vicinity of said wall and/or said transition portion.

In one aspect, the continuity portion comprises the recess.

In one aspect, the recess protrudes from a substantially flat wall of the continuity portion.

In one aspect, said recess is configured to cooperate in the engagement between a plate of a junction block and earth element.

In one aspect, the plate of the junction block is destined to be engaged in the vicinity of said recess.

In one aspect, the plate of the junction block is destined to be engaged at said recess.

In one aspect, said recess comprises an abutment or a groove.

In one aspect, the groove is configured to allow an insertion by sliding of said plate of said junction block with respect to said earth element.

In one aspect, the transition portion is interposed between the wall and the recess.

In one aspect, the constraining portion is configured to be stably engaged to said side wall of said box-shaped body.

In one aspect, the constraining portion is configured to be engaged in a non-removable manner to said side wall of said box-shaped body.

In one aspect, the constraining portion is configured to be plastically deformed together with a portion of said side wall of said box-shaped body, preferably by crimping or clinching.

In one aspect, the continuity portion is shaped to be arranged externally with respect to one or more conductive bars of said busbar module in such a way as to laterally confine said one or more conductive bars. In one aspect, the earth element is made of electrically conductive material.

In one aspect, the earth element is made of metal material.

In one aspect, the earth element is made of a plastically deformable material. In one aspect, the earth element is made of a material at least partially deformable plastically by clinching or crimping.

In one aspect, the earth element is in one piece.

In one aspect, the continuity portion is substantially flat or flat.

In one aspect, the continuity portion is made of sheet material, in particular sheet metal.

In one aspect, the constraining portion is substantially flat or flat.

In one aspect, the earth element is in a suitably shaped sheet material, in particular in a suitably shaped sheet metal.

In one aspect, the earth element has a transition portion arranged between said wall and said continuity portion with reference to a development direction of said earth element.

In one aspect, said transition portion is at least partially curved.

In one aspect, said transition portion is configured, in an operating condition in which said earth element is permanently engaged to said side wall of said box-shaped body of said busbar module by means of said constraining portion, in which said earth element is at least partially placed in connection with a further earth element of a further busbar module by means of said continuity portion and in which the continuity portion is arranged externally with respect to one or more conductive bars of said busbar module in such a way as to laterally confine said one or more conductive bars, to follow a profile of one or more conductive bars of said busbar module.

In one aspect, the main development direction of the earth element corresponds to the direction of insertion of the earth element into a seat or groove defined at a side wall of the box-shaped body.

In one aspect, the earth element has a constant height along its own development direction, preferably along its main development direction.

In one aspect, the earth element has an overall length or extension defined along its own development direction, preferably along its main development direction.

In one aspect, the earth element has a variable width defined along its own development direction, preferably along its main development direction.

In one aspect, the continuity portion and the constraining portion have a length substantially equal or comparable or of the same order of magnitude.

In one aspect, the wall is configured, in operating conditions of the earth element, to delimit at least partially, at an end portion of the busbar module, an interspace defined on one side of the box-shaped body of the busbar module.

In one aspect, the recess protrudes from the substantially flat wall of the continuity portion from a surface of the earth element destined, under operating conditions of the earth element, not to be facing the conductive bars.

In one aspect, the earth element is at the earth potential and/or is configured to be at earth potential.

In one aspect, the earth element is configured to place or bring the box-shaped body and/or the busbar module to the earth potential. In one aspect, the earth element is connected, directly or indirectly, to means configured to place the box shaped body and/or the busbar module to earth potential.

In one aspect, potential means electrical potential.

In one aspect, continuity means electrical continuity.

In one aspect, earthing means electrical earthing.

In one aspect, conductive material means electrically conductive material.

In a second aspect, the invention relates to a use of an earth element for a busbar module according to any one of the preceding aspects and/or according to any one of the appended claims for the at least partial earthing of at least one busbar module.

In a third aspect, the invention relates to a process for making an earth element for a busbar module, the earth element being according to any one of the preceding aspects and/or according to any one of the appended claims, comprising the steps of:

providing a semi-finished product,

making said constraining portion on said semi-finished product.

In one aspect, by semi-finished product it is meant a starting component or an intermediate product which needs further processing to reach the state and shape of final product; the final product corresponds to the earth element.

In one aspect, said semi-finished product comprises a first end, a second end and a central portion interposed between said first end and said second end along a development direction of said semi-finished product.

In one aspect, the step of providing a semi-finished product comprises a step of providing sheet material.

In one aspect, the step of providing a semi-finished product comprises a step of providing a sheet.

In one aspect, the step of making said constraining portion on said semi-finished product comprises a step of shaping said semi-finished product to make said constraining portion.

In one aspect, the step of shaping said semi-finished product to make said constraining portion is made at a first end of said semi-finished product.

In one aspect, the process comprises a step of making said continuity portion on said semi-finished product.

In one aspect, the step of making said continuity portion on said semi-finished product comprises a step of shaping said semi-finished product to make said continuity portion.

In one aspect, the step of shaping said semi-finished product to make said continuity portion is made at a second end of said semi-finished product.

In one aspect, the process comprises a step of making a wall on said semi-finished product.

In one aspect, the step of making a wall on said semi-finished product comprises a step of shaping or bending said semi-finished product to make said wall.

In one aspect, the step of shaping or bending said semi-finished product to make said wall is made at a central portion of said semi-finished product.

In one aspect, the process comprises a step of making a transition portion on said semi-finished product. In one aspect, the step of making a transition portion on said semi-finished product comprises a step of shaping or bending said semi-finished product to make said transition portion.

In one aspect, the step of shaping or bending said semi-finished product to make said transition portion is made at a central portion of said semi-finished product.

In one aspect, the process provides to make said transition portion between said wall and said continuity portion.

In one aspect, the method comprises a step of making a recess on said semi-finished product.

In one aspect, the step of making a recess on said semi-finished product comprises a step of shaping or bending said semi-finished product to make said recess.

In one aspect, the step of shaping or bending said semi-finished product to make said recess is made at a second end of said semi-finished product and/or of the continuity portion.

In one aspect, the step of shaping said semi-finished product comprises a step of plastically deforming said semi-finished product.

In a fourth aspect, the invention relates to a device for earthing a busbar module comprising:

at least one side wall for a box-shaped body of a busbar module or a section destined to constitute a side wall of a box-shaped body of a busbar module,

at least one earth element according to any one of the preceding aspects and/or according to any one of the appended claims,

wherein said constraining portion of said earth element is permanently engaged to said side wall.

In one aspect, the side wall for a box-shaped body of a busbar module is substantially a section destined to constitute a side wall of a box-shaped body of a busbar module.

In one aspect, the device is configured, in an operating condition in which the earth element is at least partially placed in connection with a further earth element of a further busbar module through said continuity portion, to allow at least partially the earthing of said busbar module(s).

In one aspect, said constraining portion is at least partially counter-shaped to said side wall.

In one aspect, said constraining portion is at least partially counter-shaped to said side wall, at least at one contact surface between said constraining portion and said side wall.

In one aspect, said constraining portion is at least partially counter-shaped to said side wall, at least at contact surfaces between said constraining portion and said side wall.

In one aspect, said constraining portion is at least partially counter-shaped to said side wall at at least one position.

In one aspect, said at least one position is a location of the constraining portion and/or of the side wall in which the constraining portion and the side wall are engaged in a non-removable manner.

In one aspect, said at least one position comprises an interlocking type constraint.

In one aspect, the side wall has a seat configured to allow a coupling of said constraining portion to said side wall.

In one aspect, the seat comprises a groove. In one aspect, the groove is configured to allow a coupling of said constraining portion to said side wall by sliding insertion of said constraining portion with respect to said side wall.

In a fifth aspect, the invention relates to a use of a device for earthing a busbar module to allow at least partially the earthing of at least one busbar module.

In a sixth aspect, the invention relates to a process for making a device for earthing a busbar module, comprising at least the steps of:

providing an earth element according to any one of the preceding aspects and/or according to any one of the appended claims,

providing at least one side wall for a box-shaped body of a busbar module or a section destined to constitute a side wall of a box-shaped body of a busbar module,

firmly and/or non-removably engaging said earth element to said side wall through said constraining portion.

In one aspect, the step of at least one side wall for a box-shaped body of a busbar module or a section destined to constitute a side wall of a box-shaped body of a busbar module comprises a step of providing a box-shaped body in a partially or fully assembled condition.

In one aspect, the stable engagement between said earth element to said side wall by means of said constraining portion is achieved by threaded connecting means.

In one aspect, the step of firmly and/or non-removably engaging said earth element to said side wall through said constraining portion comprises a step of plastically deforming the constraining portion of said earth element in conjunction with said side wall so as to define a non-removable engagement between said constraining portion and said side wall.

In one aspect, said step of plastic deformation is carried out by crimping or clinching.

In one aspect, the plastic deformation step is carried out at at least one position of the constraining portion and at least one respective position of the side wall.

In one aspect, the plastic deformation step is carried out at at least two positions of the constraining portion and two respective positions of the side wall.

In one aspect, the constraining portion and the side wall are counter-shaped at least at respective positions.

In one aspect, the constraining portion and the side wall are counter-shaped at an entire mutual contact surface.

In one aspect, each position defines an inlet or a pocket emerging or protruding with respect to a prevailing development plan, respectively.

In one aspect, each position defines an inlet or a pocket emerging or protruding with respect to the substantially flat development of the side wall and the constraining portion.

In one aspect, the plastic deformation carried out at each position determines a mutual arrangement of the material of the constraining portion and of the side wall which acts as an interlocking configured to prevent mutual disengagement between the constraining portion and the side wall. In one aspect, each position acts as an interlock configured to prevent mutual disengagement between the constraining portion and the side wall.

In one aspect, at each position there is no void or interruption of material, such as a hole.

In one aspect, at each position there is no step of removal of material or chip removal either from the earth element or from the side wall.

In a seventh aspect, the invention relates to an assembly for earthing at least one busbar module, comprising: at least one side wall for a box-shaped body of a busbar module,

at least one earth element according to any one of the preceding aspects and/or according to any one of the appended claims, said constraining portion being engaged to said side wall,

at least one plate for a junction block for busbar modules, said plate being engaged in contact with said continuity portion and being configured to connect said continuity portion of said earth element to a respective continuity portion of a further earth element of a further busbar module in such a way as to provide electrical continuity between said earth element and said further earth element of said further busbar module. In one aspect, the invention relates to an assembly for earthing at least one busbar module, comprising: a device for earthing a busbar module,

at least one plate for a junction block for busbar modules, said plate being engaged in contact with said continuity portion and being configured to connect said continuity portion of said earth element to a respective continuity portion of a further earth element of a further busbar module in such a way as to provide electrical continuity between said earth element and said further earth element of said further busbar module. In one aspect, the side wall for a box-shaped body of a busbar module is substantially a section destined to constitute a side wall of a box-shaped body of a busbar module.

In one aspect, the assembly comprises a junction block.

In one aspect, the junction block comprises at least one plate, in particular two plates.

In one aspect, each plate is configured to connect, to the side and on opposite sides of the busbar module, respective pairs of earth elements of adjacent busbar modules.

In one aspect, each plate is configured to be engaged in proximity to or at recesses of contiguous earth elements.

In one aspect, each plate is provided with side edges dimensioned and shaped to be slidingly inserted in the respective recesses of contiguous earth elements.

In one aspect, each plate has one or more through holes destined to allow engagement of the plates with the busbar modules.

In one aspect, the junction block comprises a covering portion and a bottom portion, destined to be respectively engaged above and below with respect to the earth elements and to the ends of the conductive bars protruding with respect to the box-shaped body of the busbar module.

In one aspect, the covering portion is provided with elements for identifying the phases and the neutral of the conductive bars of the busbar modules that the junction block is destined to join.

In one aspect, the identification elements are provided at opposite longitudinal ends of the covering portion. In one aspect, the longitudinal ends of the covering portion are opposite with reference to a main development direction of the covering portion.

In one aspect, each end of the covering portion is destined to be connected to a respective end of a respective busbar module.

In one aspect, the bottom portion is provided with elements for identifying the phases and the neutral of the conductive bars of the busbar modules that the junction block is destined to join.

In one aspect, the identification elements are provided at opposite longitudinal ends of the bottom portion.

In one aspect, the longitudinal ends of the bottom portion are opposite with reference to a main development direction of the bottom portion.

In one aspect, each end of the bottom portion is destined to be connected to a respective end of a respective busbar module.

In one aspect, the junction block comprises first connecting means configured to engage the bottom portion and the covering portion to the box-shaped body.

In one aspect, the first connecting means are of the threaded type.

In one aspect, the junction block comprises second connecting means configured to engage the plates to the busbar modules.

In one aspect, the second connecting means passes through through holes of the plates to allow engagement of the plates with the busbar modules.

In one aspect, the second connecting means are of the threaded type.

In an eighth aspect, the invention relates to a use of an assembly for earthing at least one busbar module to allow at least partially the earthing of at least one busbar module.

In a ninth aspect, the invention relates to a busbar module comprising:

a box-shaped body provided with side walls, a head wall and a bottom wall, the head wall and the bottom wall being transverse to said side walls, the box-shaped body defining a cavity therein,

conductive bars arranged in the box-shaped body at said cavity,

at least one earth element according to any one of the preceding aspects and/or according to any one of the appended claims,

said at least one earth element being firmly engaged to one of said side walls by means of said constraining portion to allow at least partially the earthing of said busbar module(s).

In one aspect, the side walls and/or the bottom wall and/or the end wall have coupling portions configured to allow the mutual assembly thereof to form the box-shaped body.

In one aspect, the busbar module extends along a main development direction and has two mutually opposite ends with respect to said main development direction.

In one aspect, the busbar module comprises at least one device for earthing a busbar module.

In one aspect, the busbar module comprises a pair of earth elements, each of which is engaged with respective side walls of the box-shaped body at a same end of the busbar module. In one aspect, the busbar module comprises a pair of devices for earthing a busbar module engaged to the bottom wall and/or to the head wall of the box-shaped body at a same end of the busbar module.

In one aspect, the busbar module comprises two pairs of earth elements, each pair of earth elements being engaged at a respective end of the busbar module.

In one aspect, the busbar module comprises two pairs of devices for earthing a busbar module, each pair of devices for earthing a busbar module being engaged at a respective end of the busbar module.

In one aspect, the busbar module or the junction block comprises positioning elements configured to allow an appropriate positioning between conductive bars and continuity portions of earth elements of a same busbar module.

In one aspect, the busbar module or the junction block comprises positioning elements configured to allow an appropriate positioning between conductive bars and continuity portions of earth elements of adjacent busbar modules.

In one aspect, each positioning element has a predominantly planar development.

In one aspect, each positioning element is substantially shaped like a plate.

In one aspect, each positioning element comprises a spacer.

In one aspect, the busbar module includes a template configured to be mounted at one end of the box-shaped body.

In one aspect, the template is mounted at one end of the box-shaped body by connecting means.

In one aspect, the connecting means are of the threaded type.

In one aspect, the template is provided with elements for identifying the phases and the neutral of the conductive bars.

In one aspect, the busbar module comprises two templates, each mounted at a respective end of the box shaped body.

In one aspect, each template is mounted in such a way that the identification elements correspond to the arrangement of the respective phases and of the neutral of the conductive bars.

In a tenth aspect, the invention relates to a use of a busbar module according to any one of the preceding aspects and/or according to any one of the appended claims in an electrical busbar plant or system.

In one aspect, an electrical busbar plant or system is defined as an electrical plant or system provided with busbar modules and respective junction blocks connecting adjacent busbar modules.

In an eleventh aspect, the invention relates to a process for assembling a busbar module, comprising at least the steps of:

providing at least one device for earthing a busbar module,

providing a plurality of sections,

providing a plurality of conductive bars,

engaging said sections and said at least one device for earthing a busbar module to form side walls and at least one between a bottom wall and a head wall of a box-shaped body defining a cavity therein, engaging said conductive bars at least partially at the cavity defined by the box-shaped body. In one aspect, the device for earthing a busbar module is according to any one of the preceding aspects and/or according to any one of the appended claims.

In one aspect, the device for earthing a busbar module is made according to the process for making a device for earthing a busbar module according to any one of the preceding aspects and/or according to any one of the appended claims.

In one aspect, the step of providing at least one device for earthing a busbar module comprises the following steps:

providing an earth element according to any one of the preceding aspects and/or according to any one of the appended claims,

stably engaging the constraining portion of said earth element to a side wall of said box -shaped body or to a section destined to constitute a side wall of said box-shaped body.

In one aspect, the step of providing at least one device for earthing a busbar module provides for making at least one device for earthing a busbar module by means of said process for making a device for earthing a busbar module.

In one aspect, the step of stably engaging the constraining portion of said earth element to a side wall of said box-shaped body or to a section destined to constitute a side wall of said box-shaped body comprises a step of engaging in a non-removable manner the constraining portion of said earth element to said side wall or to said section destined to constitute a side wall of said box-shaped body.

In one aspect, the step of stably engaging the constraining portion of said earth element to a side wall of said box-shaped body or to a section destined to constitute a side wall of said box-shaped body comprises a step of plastically deforming the constraining portion of said earth element together with said side wall or said section destined to constitute a side wall of said box-shaped body.

In one aspect, said step of plastic deformation is carried out by crimping or clinching.

In one aspect, the step of stably engaging the constraining portion of said earth element to a side wall of said box-shaped body or to a section destined to constitute a side wall of said box-shaped body is carried out without connecting means such as, for example, screws, bolts, nuts, rivets and the like.

In one aspect, the engagement between the constraining portion and the side wall is carried out before making the box-shaped body.

In one aspect, the process provides for engaging earth elements to respective sections destined to constitute the side walls of the box-shaped body and subsequently engage said sections with sections destined to constitute the bottom wall and the end wall of the box-shaped body.

In one aspect, the process provides for engaging the constraining portion and side wall in an intermediate stage of the construction of the box-shaped body.

In one aspect, the step of stably engaging the constraining portion of said earth element to a side wall of said box-shaped body or to a section destined to constitute a side wall of said box-shaped body is carried out after the box-shaped body is made. In one aspect, the process comprises a step of engaging at least one template at one end of the box-shaped body.

In one aspect, the process comprises a step of engaging two templates, each at a respective end of the box shaped body.

In one aspect, the process preferably provides for engaging each template in such a way that identification elements of each template correspond to the arrangement of the respective phases and of the neutral of the conductive bars.

In one aspect, the identification elements are configured to identify the phases and the neutral of the conductive bars of the busbar modules.

In a twelfth aspect, the invention relates to a use of at least one earth element for a busbar module or at least one device for earthing a busbar module or at least one assembly for earthing at least one busbar module or at least one busbar module according to any one of the preceding aspects and/or according to any one of the appended claims in the industrial field.

In a thirteenth aspect, the invention relates to a use of at least one earth element for a busbar module or at least one device for earthing a busbar module or at least one assembly for earthing at least one busbar module or at least one busbar module according to any one of the preceding aspects and/or according to any one of the appended claims in an electrical plant or system, preferably in an industrial electrical plant or system.

In a fourteenth aspect, the invention relates to a device for earthing a busbar module or an assembly for earthing at least one busbar module or a busbar module according to any one of the preceding aspects and/or according to any one of the appended claims in an unassembled configuration.

In a fifteenth aspect, the invention relates to a device for earthing a busbar module or an assembly for earthing at least one busbar module or a busbar module according to any one of the preceding aspects and/or according to any one of the appended claims in an assembled configuration.

In a sixteenth aspect, the invention relates to an electrical plant or system comprising at least one earth element for a busbar module according to any one of the preceding aspects and/or according to any one of the appended claims.

In one aspect, the electrical plant or system comprises a plurality of earth elements, engaged in pairs at the ends of respective busbar modules.

In one aspect, the electrical plant or system comprises at least one busbar module.

In one aspect, the electrical plant or system comprises a plurality of busbar modules.

In one aspect, the electrical plant or system comprises at least one junction block configured to join adjacent busbar modules.

BRIEF DESCRIPTION OF THE FIGURES

The present description is given hereinafter with reference to the accompanying drawings, provided only for illustrative and, therefore, non-limiting purposes, in which: figure 1 shows two contiguous busbar modules according to an exemplary embodiment of the present invention connected together by a junction block in exploded configuration,

figure 2 shows a device for earthing a busbar module according to an exemplary embodiment of the present invention illustrating two earth elements for a busbar module also according to an embodiment of the present invention and a box-shaped body of a busbar module in exploded configuration, in which an earth element is engaged to a side wall of the box-shaped body and the other earth element is in an exploded configuration with the respective side wall of the box-shaped body,

figure 3 shows a step of the process for making a device for earthing a busbar module according to an embodiment of the present invention, in which the constraining portion of the earth element is engaged at suitable seats of a side wall of the box-shaped body,

figure 4 shows a step of the process for making a device for earthing a busbar module according to an embodiment of the present invention subsequent to the step represented in figure 3, in which the earth element is non-removably engaged to the side wall of the box-shaped body,

figure 5 shows a rear view of the earthing device of a busbar module of figure 4 according to an embodiment of the present invention,

figure 6 shows a sectional view of a device for earthing a busbar module according to an embodiment of the present invention, made along the sectioning plane VI-VI shown in figure 4.

DETAILED DESCRIPTION

With reference to the figures, reference numeral 1 globally indicates an earth element for a busbar module 100 according to the invention.

In the context of the present description, by earth element 1 for a busbar module 100 it is meant an element configured for the electrical earthing of a busbar module 100, and in particular of a box-shaped body 101 of a busbar module 100.

In order to describe the technical features of the earth element 1 in relation to its intended use, in the continuation of the present description reference will be made, when necessary, to the operating conditions of the earth element 1 shown in figure 1. For completeness, it should be noted that in figure 1 a plurality of earth elements 1 is shown in operating conditions; in these conditions, the earth elements 1 are engaged to a box shaped body 101 of respective busbar modules 100.

A single earth element 1 will be described below.

The earth element 1 extends along a development direction D1 and comprises a first end 2, a second end 3 and a central portion 4 interposed between the first end 2 and the second end 3. The first end 2 is opposite with respect to the second end 3 with reference to the development direction D1 of the earth element 1.

The earth element 1 develops by an overall extension L1 defined along its development direction D1. Preferably, the aforementioned development direction D1 is a main development direction of the earth element 1. The earth element 1 comprises, at the first end 2, a constraining portion 5. The constraining portion 5 extends along the main development direction D1 of the earth element 1 by a length L5 equal to a fraction of the overall extension L1 of the earth element 1. Optionally, the constraining portion 5 extends along the main development direction D1 of the earth element 1 by a length L5 equal to about a fifth, or a quarter, or a third, or half of the overall extension L1 of the earth element 1.

As shown in the accompanying figures and in particular as shown in figures 4 and 5, the constraining portion 5 comprises a substantially flat wall 6 defining a contact surface 6a configured, in operating conditions of the earth element 1, to come into contact with a side wall 103 of the box-shaped body 101 of the busbar module 100 to provide electrical continuity between the box-shaped body 101 and the earth element 1. The constraining portion 5 ensures a surface (not accurate) contact between the side wall 103 of the box-shaped body 101 and the earth element 1, that is, developing on an extended surface (the contact surface 6a) and therefore ensures excellent electrical continuity between the side wall 103 of the box -shaped body 101 and the earth element 1. As will be seen in greater detail below, the constraining portion 5 is configured to engage stably with a side wall 103 of a box-shaped body 101 of a busbar module 100 to ensure, in addition to electrical continuity, also the mechanical engagement between the box-shaped body 101 and earth element 1 itself.

In order to provide electrical continuity as detailed above, the constraining portion 5 may be of electrically conductive material.

The constraining portion 5 may be made of sheet material, in particular sheet metal. Preferably, the constraining portion 5 is made of metal material.

The constraining portion 5 is preferably made of a plastically deformable material. As will be described in detail hereinafter with reference to the process for making a device 50 for earthing a busbar module 100 according to the invention, the plastic deformability of the constraining portion 5 is suitable to allow a non removable engagement between the earth element 1 and a side wall 103 of a box -shaped body 101 of a busbar module 100. Preferably, the constraining portion 5 is made of a material plastically deformable by clinching or crimping.

The earth element 1 further comprises, at the second end 3, a continuity portion 7. The continuity portion 7 extends along the main development direction D1 of the earth element 1 by a length L7 preferably equal to at least a quarter of the overall extension L1 of the earth element 1. Optionally, the continuity portion 7 extends along the main development direction D1 of the earth element 1 by a length L7 equal to about one third of the overall extension L1 of the earth element 1. The continuity portion 7 and the constraining portion 5 may have a respective length L7, L5 which is substantially equal or comparable.

As shown in the accompanying figures, the continuity portion 7 comprises a substantially flat wall 8.

The continuity portion 7 further comprises a recess 9 extending along an orthogonal direction with respect to the main development direction D1 of the earth element 1. Preferably, the recess 9 develops over an entire height H7 of the continuity portion 7. As illustrated in the accompanying figures, the recess 9 protrudes from the substantially flat wall 8 of the continuity portion 7. The recess 9 comprises a groove, which may be configured to cooperate in the engagement between a plate 71 of a junction block 70 and the earth element 1. Optionally, the groove 9 may allow an insertion by sliding of a plate 71 of a junction block 70 with respect to the earth element 1.

As will be seen in greater detail below, the plate 71 may be configured to provide electrical continuity between continuity portions 7 of respective earth elements 1 of contiguous busbar modules 100.

In the context of the present description, a junction block or junction box 70 means a member configured to join contiguous busbar modules 100, mechanically and electrically. Figure 1 shows a junction block 70 in an exploded configuration, so as to illustrate the earth elements 1.

The continuity portion 7 is configured to be placed, in operating conditions, in connection with a respective continuity portion 7 of a further earth element 1 of a contiguous busbar module 100, to provide electrical continuity between them. The connection between continuity portions 7 of respective earth elements 1 of contiguous busbar modules 100 may be indirect, i.e. it may be implemented by means of the aforesaid plate 71 of a junction block 70. The connection between continuity portions 7 of respective earth elements 1 of contiguous busbar modules 100 provides electrical continuity and therefore allows the earthing of the box shaped bodies 101 of the busbar modules 100. In figure 1, both plates 71 of the junction block 70 destined to allow electrical continuity between continuity portions 7 of respective earth elements 1 of contiguous busbar modules 100 are illustrated in an exploded configuration.

In order to provide electrical continuity as detailed above, the continuity portion 7 may be of electrically conductive material.

The continuity portion 7 may be made of sheet material, in particular sheet metal.

Preferably, the continuity portion 7 is made of metal material.

As will be described in greater detail below and as shown in figure 1, the continuity portion 7 is shaped and configured, under operating conditions of the earth element 1, to laterally confine one or more conductive bars 102 of a busbar module 100.

The earth element 1 further comprises, at the central portion 4, a wall 10 extending transversely to the continuity portion 7 and to the constraining portion 5. With reference to the main development direction D1 of the earth element 1, the wall 10 is interposed between the constraining portion 5 and the continuity portion 7. The wall 10 emerges transversely, in particular orthogonally, with respect to the continuity portion 7 and to the constraining portion 5. The constraining portion 5 protrudes from the wall 10.

As shown in figure 1, the wall 10 is configured, in operating conditions of the earth element 1, to delimit at least partially, at an end portion of the busbar module 100, an interspace 106 defined on one side of the box shaped body 101 of the busbar module 100.

The wall 10 may be substantially flat.

The wall 10 may extend along its own main development direction by a height H10 which may be substantially equal to a height H7 of the continuity portion 7 and greater than a height H5 of the constraining portion 5.

The wall 10 may also extend, along a development direction D10 transversal or orthogonal to the continuity portion 7 and to the constraining portion 5 by a length L10 at least equal preferably to a quarter of the overall extension L1 of the earth element 1. The development direction D10 is orthogonal to the main development direction of the wall 10 along which the height H10 of the wall 10 is defined and is transverse to the main development direction D1 of the earth element 1. Preferably, the development direction D10 is orthogonal to the main development direction D1 of the earth element 1.

The earth element 1 also comprises, at the central portion 4, a transition portion 11. As shown in figure 2, the transition portion 11 is interposed, with reference to the main development direction D1 of the earth element 1, between the wall 10 and the continuity portion 7, and in particular between the wall 10 and the recess 9. The transition portion 11 develops seamlessly with the wall 10 and with the continuity portion 7. Preferably, the transition portion 11 is at least partially transverse to the wall 10 and to the continuity portion 7.

The transition portion 11 is shaped and configured, under the operating conditions of the earth element 1 shown in figure 1, to follow a profile of one or more conductive bars 102 of the busbar module 100. In particular, the transition portion 11 is shaped and configured to follow direction variations or at least partially curved portions in the profile of one or more conductive bars 102 of the busbar module 100.

For this purpose, as illustrated in the accompanying figures, the transition portion 11 may be at least partially curved.

The transition portion 11 may comprise a first fitting 11 a seamlessly joining the transition portion 11 to the wall 10, an intermediate stretch 11b and a second fitting 11c connecting seamlessly the transition portion 11 to the continuity portion 7.

The intermediate stretch 11b develops seamlessly between the first fitting 11a and the second fitting 11c, joining them.

With reference to a sectioning plane transverse to the transition portion 11, the intermediate stretch 11b may be substantially straight.

With reference to a sectioning plane transverse to the transition portion 11, the first fitting 11a and the second fitting 11c may be at least partially curved.

In a variant, the transition portion 11 may have a profile defined, in section, by the succession of a plurality of segments geometrically constituting broken straight lines. In this embodiment, both the first fitting 11a and the second fitting 11c may be substantially straight, with reference to a sectioning plane transversal to the transition portion 11.

The transition portion 11 extends along the main development direction D1 of the earth element 1 by a length L11 preferably equal to at least a quarter of the overall extension L1 of the earth element 1. Optionally, the transition portion 11 extends along the main development direction D1 of the earth element 1 by a length L11 equal to about one third of the overall extension L1 of the earth element 1, preferably comprised between a quarter of the overall extension L1 of the earth element 1 and one third of the overall extension L1 of the earth element 1. In the embodiment shown in the accompanying figures, the transition portion 11 extends by a length L11 smaller than a length L5 of the constraining portion 5 and a length L7 of the continuity portion 7. The transition portion 11 further develops along its own main development direction by a height H11 which can be substantially equal to a height H7 of the continuity portion 7 and a height H10 of the wall 10 and greater than a height H5 of the constraining portion 5.

As illustrated in the accompanying figures, the earth element 1 may be in a single piece.

To allow electrical continuity with the box-shaped body of the busbar module 100 to which it is destined to be engaged, the earth element 1 may be made of electrically conductive material.

Preferably, the earth element 1 is made of metal material.

The earth element 1 may be made of plastically deformable material. Preferably, the earth element 1 is made of a material plastically deformable by clinching or crimping.

According to the present invention, the earth element 1 for the busbar module 100 described above can be used for at least partial earthing of at least one busbar module 100.

As will be seen in greater detail below, the earth element 1 may be made by suitably shaping sheet material, such as a metal sheet, for example by plastic deformation.

The present invention also relates to a process for making an earth element 1 for a busbar module 100. The earth element 1 made according to such a process is preferably of the type described above.

The process for making an earth element 1 provides for preparing a semi-finished product.

The semi-finished product may extend along a main development direction and comprises a first end, a second end and a central portion interposed between the first end and the second end. The first end is opposite with respect to the second end with reference to the main development direction of the semi-finished product. The starting semi-finished product may be substantially flat.

The semi-finished product may be for example made of sheet material, such as a sheet metal.

The semi-finished product may be of metal material.

Preferably, the semi-finished product is made of electrically conductive material.

The semi-finished product may be of plastically deformable material, preferably of a material plastically deformable by clinching or crimping.

The process for making an earth element 1 provides for making the constraining portion 5, the continuity portion 7, the recess 9, the wall 10 and/or the transition portion 11.

The manufacture of these portions 5, 7, 11 , of the wall 10 and of the recess 9 may be carried out by shaping and/or by plastic deformation of the semi-finished product, in one or more steps.

For example, individual steps may be provided for the manufacture of each portion 5, 7, 11 , of the wall 10 and of the recess 9, or one or more steps may be provided, in which for example jointly or at the same time, one or more portions 5, 7, 11 , the wall 10 and/or the recess 9 can be made.

In order to make the earth element 1 of the type described above, the constraining portion 5 is made at a first end of the semi-finished product, the wall 10 is made at a central portion of the semi-finished product, the continuity portion 7 is made at a second end of the semi-finished product, the recess 9 is made at the second end of the semi-finished product or the continuity portion 7 and the transition portion 11 is made at a portion interposed between the central portion and the second end of the semi-finished product. The portions 5, 7, 11 , the wall 10 and the recess 9 may be made by shaping and/or by bending the semi finished product.

Preferably, the portions 5, 7, 11 , the wall 10 and the recess 9 are made by plastic deformation of the semi finished product.

The invention also relates to a device 50 for earthing a busbar module 100. The device 50 comprises at least one earth element 1 of the type described above. The device 50 further comprises a side wall 103 for a box shaped body of a busbar module 100. The side wall 103 for a box-shaped body 101 of a busbar module 100 is substantially a section destined to constitute a side wall 103 of a box-shaped body 101 of a busbar module 100

The constraining portion 5 of the earth element 1 is permanently engaged to the side wall 103. In particular, as shown in figures 4, 5 and 6, the constraining portion 5 of the earth element 1 is non-removably engaged with the side wall 103. Preferably, as will be seen in greater detail below with reference to the process for making the device 50, the non-removable engagement between the constraining portion 5 and the side wall 103 is achieved by plastic deformation at least of the constraining portion 5. According to a preferred embodiment of the present invention, the plastic deformation of the constraining portion 5, adapted to engage the constraining portion 5 to the side wall 103, is carried out jointly or simultaneously with a plastic deformation of the side wall 103, preferably by crimping or clinching.

In other words, the constraining portion 5 and the side wall 103 may be subjected to a contextual plastic deformation operation, such as clinching or crimping, in order to guarantee a stable and non-reversible mechanical connection. The mechanical connection thus obtained preferably also allows the electrical continuity between the constraining portion 5 and the side wall 103, and therefore between the side wall 103 and the earth element 1.

From a functional point of view, the device 50 for earthing a busbar module 100 is configured, in an operating condition in which the earth element 1 is permanently engaged with the side wall 103 by means of the constraining portion 5 and is at least partially placed in connection with a further earth element 1 of a further busbar module 100 by means of the continuity portion 7, to allow at least partially the earthing of the busbar module(s) 100.

According to the present invention, the device 50 for earthing a busbar module 100 may be used to allow at least partially the earthing of at least one busbar module 100.

The present invention further relates to a process for making a device 50 for earthing a busbar module 100. The manufacturing process of the device 50 provides for providing an earth element 1 of the type described above.

The manufacturing process of the device 50 further provides for providing at least one side wall 103 for a box shaped body 101 of a busbar module 100. Alternatively, a box-shaped body 101 (or a portion thereof comprising at least two sections) of a busbar module 100 may be provided comprising at least one side wall 103. As said above, the side wall 103 for a box-shaped body 101 of a busbar module 100 is substantially a section destined to constitute a side wall 103 of a box-shaped body 101 of a busbar module 100. The aforementioned side wall 103 is preferably provided with one or more seats 107 configured to allow the engagement of the earth element 1 to the side wall 103. As will be described in greater detail below, the side wall 103 may have, at least at an end portion thereof, a seat 107 at a lower portion thereof and a further seat 107 at an upper portion thereof. The lower portion and the upper portion are defined with reference to the orientation that the side wall 103 usually assumes under operating conditions (see figure 1).

Preferably, each seat 107 comprises a respective groove configured to allow engagement of the earth element 1 to the side wall 103 by sliding insertion of the constraining portion 5 of the earth element 1 with respect to the side wall 103.

The process for making the device 50 provides for the constraining portion 5 to be slidably inserted in the seat or groove of the side wall. Figure 2 illustrates for example an earth element 1 with a constraining portion 5 engaged by sliding insertion in the seat 107 of a side wall 103 of the box-shaped body 101 and a further earth element 1 , in the foreground of the figure, in an exploded configuration with respect to a respective side wall 103 of the box-shaped body 101 , that is, with its constraining portion 5 not yet inserted at the seat or groove 107 of the respective side wall 103.

Figure 3 shows in a front view the wall 6 of the constraining portion 5 of an earth element 1 engaged inside the seat or groove 107 of a side wall 103 of the box-shaped body 101.

The process for making the device 50 further provides for the non-removable engagement of the constraining portion 5 to the side wall 103. The non-removable engagement step of the constraining portion 5 to the side wall 103 is carried out after the step which provides for slidingly inserting the constraining portion 5 in the seat or groove 107 of the side wall 103. The non-removable engagement between the constraining portion 5 and the side wall 103 is preferably made by plastic deformation of the constraining portion 5 and of the side wall 103. The constraining portion 5 and the side wall 103 may be plastically deformed jointly or at the same time, for example by means of a single plastic deformation step. Preferably, with the aim of defining a non removable engagement between the constraining portion 5 and the side wall, the plastic deformation step is carried out by crimping or clinching. As shown in figures 5a and 5b, the plastic deformation step may be carried out at at least two positions 5a, 5b of the constraining portion 5 and two respective positions 50a, 50b of the side wall 103. The constraining portion 5 and the side wall 103 are shaped complementarily at least at the aforesaid respective positions 5a, 5b, 50a, 50b. Optionally, the constraining portion 5 and the side wall 103 are counter-shaped at an entire mutual contact surface 6a (see figure 6).

Figure 4 and figure 5 respectively show a front view and a rear view of a device 50 for earthing a busbar module 100 made according the described process, in which positions 5a, 5b, 50a, 50b at which the previously described crimping or clinching deformation operations are carried out are visible.

It is understood that the arrangement and number of positions may be different from that shown in the accompanying figures, which show an exemplary and non-limiting embodiment of the invention. Figure 6 shows a section of the earthing device 50 of a busbar module 100 of figure 4, made along the sectioning plane VI-VI illustrated in figure 4, illustrating in a greater detail a possible arrangement of the material of the constraining portion 5 and of the side wall 103 at a position 5b, 50b, in which the result of a plastic deformation of the constraining portion 5 and of the side wall by crimping or clinching is schematized. As shown in figure 6, due to the arrangement of the material resulting from the plastic deformation, at this position the material of the constraining portion 5 and of the side wall is arranged to form a constraint of the substantially interlocking type, which prevents the disengagement of the constraining portion 5 from the side wall, and vice versa. Moreover, as shown in figure 6 as regards position 5b, 50b, each position 5a, 5b, 50a, 50b can define an inlet or a pocket emerging with respect to a prevailing development plane of the side wall 103 and of the constraining portion 5, respectively.

In the preferred embodiment of the present invention, the non-removable engagement step between the constraining portion 5 and the side wall 103 is performed without the use of connecting means such as, for example, screws, bolts, nuts, rivets and the like.

The invention also relates to an assembly 60 for earthing at least one busbar module 100 comprising at least one earth element 1 of the type described above engaged to a respective side wall 103 for a box-shaped body 101 of a busbar module and at least one plate 71 for a junction block 70 for busbar modules 100 (see figure 1). Basically, the assembly 60 for earthing at least one busbar module 100 comprises at least one device 50 for earthing a busbar module 100 described above and at least one plate 71 for a junction block 70 for busbar modules 100.

As mentioned above, a junction block or junction box 70 means a member configured to join contiguous busbar modules 100, mechanically and electrically. Figure 1 is a partially exploded view of figure 70.

The plate 71 is engaged in contact with the continuity portion at or in the vicinity of the recess 9 and is configured to connect the continuity portion 7 of the earth element 1 to a respective continuity portion 7 of a further earth element 1 of a contiguous busbar module 100 so as to provide electrical continuity between the earth element 1 and the further earth element 1 of the further busbar module 100.

The assembly 60 may comprise the junction block 70.

The junction block 70 comprises at least one plate 71 , and in particular two plates 71 configured to connect, laterally and on opposite sides of the busbar module 100, respective pairs of earth elements 1 of contiguous busbar modules 100.

Each plate 71 may be configured to be engaged in the vicinity of or at recesses 9 of adjacent earth elements 1. Optionally, for this purpose, each plate 71 may be provided with side edges sized and shaped to be slidingly inserted in the respective recesses 9 of adjacent earth elements 1 or to cooperate with the recesses 9 of adjacent earth elements 1. Each plate 71 may also have one or more through holes 72 destined to allow engagement of the plates 71 with the busbar modules 100, as will be described in greater detail below.

The junction block 70 may further comprise a covering portion 73 and a bottom portion 74, destined to be respectively engaged above and below with respect to the earth elements 1 and to the ends of the conductive bars protruding with respect to the box-shaped body 101 of the busbar module 100. The covering portion 73, the bottom portion 74 and the terms "superiorly", "interiorly" and "laterally" are defined with reference to the orientation that the junction block 70 usually assumes in operating conditions, which can be deduced from the explosion directions of the plates, of the covering portion 73 and of the bottom portion 74 of the junction block 70 of figure 1.

The covering portion 73 may be provided with elements 75 for identifying the phases and the neutral of the conductive bars 102 of the busbar modules 100 that the junction block 70 is destined to join. The identification elements 75 may be provided at opposite longitudinal ends of the covering portion 73. The longitudinal ends of the covering portion 73 are opposite with reference to a main development direction of the covering portion 73. Each end of the covering portion 73 is destined to be connected to a respective end of a respective busbar module 100.

Likewise, the bottom portion 74 may be provided with elements 75 for identifying the phases and the neutral of the conductive bars of the busbar modules 100 that the junction block 70 is destined to join. The identification elements 75 may be provided at opposite longitudinal ends of the bottom portion 74. The longitudinal ends of the bottom portion 74 are opposite with reference to a main development direction of the bottom portion 74. Each end of the bottom portion 74 is destined to be connected to a respective end of a respective busbar module 100.

The junction block 70 may further comprise first connecting means 76 configured to engage the bottom portion 74 and the covering portion 73 with the box-shaped body 101.

The first connecting means 76 may be of the threaded type.

The junction block 70 may further comprise second connecting means 77 configured to engage the plates 71 to the busbar modules 100. The second connecting means 77 may pass through the through holes 72 of the plates 71 to allow engagement of the plates 71 with the busbar modules 100.

The second connecting means 77 may be of the threaded type.

According to the present invention, the assembly 60 for earthing a busbar module 100 may be used to allow at least partially the earthing of at least one busbar module 100.

The invention also relates to a busbar module 100 comprising at least one earth element 1 of the type described above, a box-shaped body 101 and conductive bars 102.

The box-shaped body 101 is provided with side walls 103, a head wall 104 and a bottom wall 105. The walls 103, 104, 105 of the box-shaped body 101 are assembled together in such a way that the head wall 104 and the bottom wall 105 are transverse to the side walls 103 and substantially parallel to each other. The side walls 103 are substantially parallel to each other.

The head wall 104 is arranged at an upper portion of the busbar module 100, while the bottom wall 105 is arranged at a lower portion of the busbar module 100. The head wall 104, the bottom wall 105 of the box shaped body 101 and the upper portion and the lower portion of the busbar module 100 are defined with reference to the orientation that the busbar module 100 usually assumes under operating conditions, which is shown in figure 1. The side walls 103 are shaped so as to define interspaces 106 at opposite sides of the box-shaped body. Figure 1 shows the interspaces 106 on a respective side of contiguous busbar modules 100. The interspaces

106 are configured for housing wiring or additional conventional elements of an electrical busbar system (not shown in the accompanying figures).

In the context of the present description, by electrical busbar system it is meant an electrical system provided with busbar modules 100 and respective junction blocks 70 connecting the busbar modules 100.

The box-shaped body 101 defines a cavity in its interior, at which the conductive bars 102 are arranged. As shown in figure 1 , the conductive bars 102 protrude from opposite ends of the box-shaped body 101.

Each side wall 103 of the box-shaped body 101 has at least one seat 107. In particular, each side wall 103 comprises a seat 107 at a lower portion thereof and a respective seat 107 at an upper portion thereof. The lower portion and the upper portion of the side walls 103 of the box-shaped body 101 are defined with reference to the orientation that the busbar module 100 usually assumes under operating conditions, which is shown in figure 1.

Each seat 107 is configured to allow the constraining portion 5 to be joined to the side wall 103. In particular, as illustrated in the accompanying figures, each seat 107 may comprise a respective groove. Each groove

107 may be configured to allow a coupling of a constraining portion 5 of an earth element 1 to the side wall 103 by sliding insertion of the constraining portion 5 with respect to the side wall 103. In other words, the upper groove 107 and the lower groove 107 of the same side wall 103 constitute guides cooperating with each other to allow an easy sliding insertion of the constraining portion 5 with respect to the side wall 103. According to such an assembly by sliding insertion, under operating conditions of the earth element 1 the constraining portion 5 extends at least partially inside the box-shaped body 101 and is in contact with the respective side wall 103 of the box-shaped body 101 at the contact surface 6a of the constraining portion 5. Moreover, as shown in figure 1 , under operating conditions the earth element 1 is engaged to the box -shaped body 101 so as to delimit, by means of its wall 10, a respective interspace 106 at one end of the box -shaped body 101. Under the assembled conditions of the busbar module 100 illustrated in figure 1 , the continuity portion 7 laterally delimits the conductive bars protruding from the box-shaped body, surrounding them.

Up to now, reference has been made to a busbar module 100 comprising an earth element 1 ; however, it should be noted that a busbar module 100 may comprise two earth elements 1 at a same end destined to face an adjacent busbar module 100 and to be connected to a respective end of the adjacent busbar module 100 by a junction block 70. The busbar module 100 may therefore comprise two earth elements 1 the respective constraining portions 5 whereof are engaged to the respective side walls 103 of the box-shaped body 101 , the respective walls 10 thereof delimit the respective interspaces 106 at opposite sides thereof an end of the box-shaped body 101 and the continuity portions 7 whereof laterally surround the conductive bars 102 (see figure 1) on respective opposite sides of the same end of the busbar module 100.

As shown in figure 1 , the busbar module 100 may comprise four earth elements 1, arranged in pairs at respective ends of the box-shaped body 101. A similar busbar module 100 comprising four earth elements 1 may be for example a busbar module 100 destined to be interposed between two adjacent busbar modules

100 and destined to be connected to them by means of respective junction blocks 70.

Each pair of earth elements 1 may be arranged and engaged at a respective end of the box -shaped body 101 according to what described above.

As for the conductive bars 102, they may be at least two, or at least three, or at least four. For example, a conductive bar 102 may be provided for each phase of a three-phase electrical system and a fourth conductive bar 102 may be provided for the neutral. Figure 1 shows, by way of example and in an absolutely non-limiting manner, busbar modules 100 provided with four conductive bars 102.

The conductive bars 102 may have tapered or stretched apart portions at ends protruding from the box shaped body 101. By tapered or stretched apart portions it is meant portions which have a change of direction tending to deviate from a mainly straight development direction of the conductive bars.

The busbar module may also comprise a template 108 configured to be mounted at one end of the box shaped body 101. The template 108 may be mounted at one end of the box-shaped body 101 by connecting means 109. The connecting means 109 may be of the threaded type.

The template 108 may be provided with elements 110 for identifying the phases and the neutral of the conductive bars 102. Optionally, the busbar module 100 may comprise two templates 108, each mounted at a respective end of the box-shaped body 101.

Each template is preferably is mounted in such a way that the identification elements 110 correspond to the arrangement of the respective phases and of the neutral of the conductive bars 102.

According to the present invention, the busbar module 100 may be used in an electrical plant or system, for example in an industrial electrical plant or system.

The present invention also relates to a process for assembling busbar module 100.

The assembly process of a busbar module 100 provides for providing at least one device 50 for earthing a busbar module 100 of the type described above, a plurality of sections and a plurality of conductive bars 102. As described above with reference to the process for making a device 50 for earthing a busbar module, the device 50 for earthing a busbar module 100 substantially comprises a side wall 103 for a box-shaped body

101 of a busbar module 100 which is permanently engaged to an earth element 1. The side wall 103 for a box-shaped body 101 of a busbar module 100 is substantially a section destined to constitute a side wall 103 of a box-shaped body 101 of a busbar module 100.

Preferably, the process provides for providing two devices 50 for earthing a busbar module 100, destined to constitute the two side walls 103 of the box-shaped body 101 , to each of which at least one earth element 1 is permanently engaged.

The assembly process involves engaging the sections to form the side walls 103, the head wall 104 and the bottom wall 105 of a box-shaped body 101 of the busbar module 100 defining a cavity at its interior.

The arrangement of the device 50 for earthing a busbar module 100 can be carried out before the engagement of the sections or in an intermediate step of the engagement of the sections. For example, the engagement of sections may be provided to form a side wall 103 and at least one between the head wall 104 and the bottom wall 105 of the box-shaped body 101 , and subsequently the device 50 for earthing a busbar module 100 may be arranged. Optionally, the arrangement of the device 50 for earthing a busbar module 100 comprises the manufacture of the device 50 for earthing a busbar module by the process for making the device 50 described above. Subsequently, the engagement of the further sections may be provided to form the complete box-shaped body 101 , comprising the side walls 103, the head wall 104 and the bottom wall 105.

The assembly process further provides for engaging the conductive bars 102 at least partially at the cavity defined by the box-shaped body 101.

The engagement of the conductive bars 102 in the cavity defined by the box-shaped body 101 is carried out in such a way that the ends of the conductive bars 102 protrude at at least one end of the box-shaped body 101 , in particular at both ends of the box-shaped body 101 (see figure 1). For this purpose, the box-shaped body 101 is provided with suitable openings at end portions of the box-shaped body 101. The engagement of the conductive bars 102 in the cavity is preferably carried out in such a way that tapered ends of the conductive bars 102 protrude at at least one end of the box-shaped body 101 , in particular at both ends of the box shaped body 101.

The engagement of the conductive bars 102 in the cavity defined by the box-shaped body 101 is carried out before the engagement of the head wall 104 or of the bottom wall 105 to the side walls 103. For example, the engagement of the sections to define side walls 103 and the bottom wall 105 of the box-shaped body 101 may be provided, then the engagement of the conductive bars 102 in the cavity may be provided and subsequently the engagement of the section to form the head wall 104 of the box-shaped body 101 may be provided.

The assembly process of a busbar module 100 may furthermore involve the engagement of at least one template 108 at one end of the box-shaped body 101 or the engagement of two templates 108, each at a respective end of the box-shaped body 101.

The process preferably provides for engaging each template 108 in such a way that the identification elements 110 correspond to the arrangement of the respective phases and of the neutral of the conductive bars 102.

The busbar module 100 obtained by means of the aforementioned assembly process may be of the type described above, and may therefore have a pair of earth elements 1 (therefore, considering also the side walls 103 engaged to the respective earth elements 1 , a pair of devices 50 for earthing a busbar module 100) at a same end of the busbar module 100 or two pairs of earth elements 1 (therefore, also considering the side walls 103 engaged to the respective earth elements 1, two pairs of devices 50 for earthing a busbar module 100), in which each pair is arranged at respective opposite ends of the busbar module 100 (see figure 1).

ADVANTAGES OF THE INVENTION

The present invention allows obtaining one or more of the following advantages and solving one or more of the drawbacks of the prior art. First of all, the invention provides an earth element 1 which allows a safe and effective earthing of a busbar module 100. This is possible due to the shape of the constraining portion 5, which guarantees a greater contact surface 6a and therefore a better connection and electrical continuity between the side wall 103 of the box-shaped body 101 and the earth element 1.

The earth element according to the invention also allows a stable and robust engagement to the box-shaped body 101 ; this is possible due to the constraining portion 5, which is configured and shaped, as described above, to allow a firm engagement of the earth element 1 to the box-shaped body 101.

In particular, the earth element 1 according to the invention provides the possibility of carrying out the engagement of the earth element 1 to a side wall 103 of the box-shaped body 101 without having to use connecting means such as, for example, screws, bolts, nuts, rivets and the like. This allows a stable connection between the earth element 1 and the side wall 103 of the box-shaped body 101 and an optimal earthing of the busbar module 100 in that, as described above in relation to the prior art, the connecting means constitute potential weak points in the busbar modules both mechanically and electrically. In light of this, not providing the aforesaid connecting means between the earth element 1 and the box-shaped body 101 is particularly advantageous in that it entails a reduction in costs and a faster assembly of the earth element 1 to the side wall 103 of the box-shaped body 101.

The aforementioned advantages also extend to the device 50 for earthing a busbar module, to the assembly 60 for earthing at least one busbar module 100 and the busbar module 100 according to the invention, since each of them comprises at least one earth element 1 of the type described above.

The invention also provides a use of an earth element 1 for a busbar module 100, a device 50 for earthing a busbar module 100 and an assembly 60 for earthing at least one busbar module busbar 100 which allows achieving an optimal earthing of at least one busbar module 100, in particular due to the technical features of the constraining portion 5 described above. Moreover, in the preferred embodiment of the invention the use of connecting means such as, for example, screws, bolts, nuts, rivets and the like is not provided and therefore the aforementioned use is subject to considerably reduced or even substantially null risks of malfunctioning. The invention further provides a process for making a device 50 for earthing a busbar module 100 which is rational, simple and effective.

Advantageously, within this process, the non-removable engagement between the constraining portion 5 of the earth element 1 and the side wall 103 is implemented without the use of connecting means such as, for example, screws, bolts, nuts, rivets and the like and therefore makes the process faster. The process for making a device 50 for earthing a busbar module 100 therefore involves a smaller number of components and consequently has reduced costs and execution times.

Furthermore, the stable engagement between the earth element 1 and the side wall 103 of the box-shaped body 101 minimizes material waste, since no drilling or chip removal operations are preferably provided.

The invention also provides an assembly process for a busbar module 100 which can be implemented in a few simple steps. In fact, the absence of the aforementioned connecting means eliminates an assembly step. The invention is also convenient to use and easy to implement.