Measuring device for medium voltage electrical equipment

Abstract

A measuring device (20) for medium voltage electrical equipment (100) is proposed, comprising:- a support (1),- a sensor (2) configured to detect vibrations, the sensor (2) being integral with the support (1),in which the support (1) comprises a first magnet (7) configured to fix the measuring device (20) on a receiving area (50) of the medium voltage electrical equipment (100),in which the support (1) comprises three contact surfaces (4, 5, 6) configured to come into contact with the receiving area (50) of the medium voltage electrical equipment (100),in which the three contact surfaces (4, 5, 6) extend in planes (P1, P2, P3) intersecting two by two. Abstract figure: Figure 2

Description

Title of the invention: Measuring device for medium voltage electrical equipment Technical field

[0001] The present invention relates to the field of medium voltage electrical equipment, such as medium voltage switchboard cells for primary distribution and secondary distribution. Prior art

[0002] It is known to monitor the proper functioning of medium voltage electrical equipment by analyzing the vibration signal of the electrical equipment. Analysis of the vibration signal thus makes it possible to detect particular events, such as the deterioration of the health of the mechanism of the equipment, or even a partial discharge inside the equipment.

[0003] In order to acquire a vibration signal representative of the operation of the medium voltage electrical equipment, a measuring sensor can be attached to this equipment.

[0004] Such an installation can be delicate. In particular, it is important that the acquired vibration signal is reproducible between identical equipment, so that the same vibration signal analysis techniques can be used for identical equipment. In addition, the intervention time for the installation of the measuring sensor must be limited as much as possible, in order to disrupt the operation of the electrical equipment as little as possible. Another important criterion is not to degrade the performance of the electrical equipment by installing a measuring sensor.

[0005] The aim of the invention is to provide a solution making it possible to meet these different criteria. Summary

[0006] To this end, the invention proposes a measuring device for medium voltage electrical equipment, comprising: - a support, - a sensor configured to detect vibrations, the sensor being integral with the support, - a first magnet configured to fix the measuring device to a receiving area of ​​the medium voltage electrical equipment, in which the support comprises three contact surfaces configured to come into contact with the receiving area of ​​the medium voltage electrical equipment, and in which the three contact surfaces extend in planes intersecting two by two.

[0007] In other words, the three contact surfaces extend in non-parallel planes two by two. The three contact surfaces thus define an area allowing repeatable positioning of the measuring device on the electrical equipment. The first magnet allows the measuring device to be fixed to the electrical equipment without any modification of the electrical equipment.

[0008] The features listed in the following paragraphs can be implemented independently of each other or in any technically possible combination:

[0009] The receiving zone may comprise three receiving portions extending in planes intersecting two by two.

[0010] The receiving area comprises a ferromagnetic material.

[0011] The first magnet is configured to hold the measuring device on the receiving area without slipping during nominal operation of the electrical equipment.

[0012] The support may be metallic.

[0013] The support may be formed by bending a metal strip.

[0014] The thickness of the metal strip is for example between 0.5 millimeters and 3 millimeters.

[0015] The strip is for example folded in two perpendicular folding directions.

[0016] The support may be made of plastic material.

[0017] The support can be overmolded onto the sensor.

[0018] The sensor can be screwed or glued to the support. The sensor can be mounted by press-fitting into the support.

[0019] The sensor may be an accelerometer.

[0020] The sensor is for example a three-axis accelerometer.

[0021] The sensor may be a wireless sensor.

[0022] The sensor may also be of the energy harvesting type. For example, the sensor may be powered by a piezoelectric generator.

[0023] The sensor may be a wired sensor.

[0024] According to one embodiment of the measuring device, the three contact surfaces are flat.

[0025] According to one embodiment of the measuring device, the three contact surfaces are orthogonal two by two.

[0026] The fixing of the measuring device to a parallelepiped-shaped receiving area is thus facilitated.

[0027] The three receiving portions of the receiving zone can be orthogonal two by two.

[0028] The receiving area of ​​the medium voltage electrical equipment and a portion of the support have complementary shapes.

[0029] According to one embodiment of the measuring device, the first magnet is integral with the sensor.

[0030] The mechanical integration of the first magnet is thus facilitated.

[0031] According to an alternative embodiment of the measuring device, the first magnet is integral with the support. In other words, the holder includes the first magnet.

[0032] According to one embodiment of the measuring device, the support comprises a second magnet configured to hold the measuring device on the receiving area of ​​the medium voltage electrical equipment.

[0033] The second magnet may be cylindrical in shape.

[0034] The second magnet may be flush with a first contact surface.

[0035] The second magnet is attached to the support.

[0036] The second magnet is for example glued to the support.

[0037] According to one embodiment of the measuring device, the support comprises a third magnet configured to hold the measuring device on the receiving area of ​​the medium voltage electrical equipment.

[0038] According to one embodiment of the measuring device, the second magnet comprises a free surface extending in a plane parallel to a first contact surface of the support.

[0039] According to one embodiment of the measuring device, the third magnet comprises a free surface extending in a plane parallel to a second contact surface of the support.

[0040] The free surface of the second magnet and the free surface of the third magnet are thus non-parallel. The second magnet and the third magnet thus generate magnetic forces in transverse directions. The fixing of the measuring device is improved.

[0041] The free surface of the second magnet is distinct from the free surface of the third magnet.

[0042] The third magnet is for example cylindrical in shape.

[0043] The third magnet may be flush with a second contact surface.

[0044] The fixing force, resulting from the interaction between the third magnet and the receiving area of ​​the medium voltage electrical equipment is thus maximized.

[0045] The third magnet is attached to the support. The third magnet is for example glued to the support.

[0046] According to one embodiment, the free surface of the second magnet forms a first contact surface.

[0047] The relative positioning of the second magnet with respect to the receiving area of ​​the medium voltage electrical equipment is thus the only factor involved in the relative positioning of the support with respect to the receiving area of ​​the medium voltage electrical equipment. The precision required in producing the support can thus be reduced.

[0048] According to one embodiment, the free surface of the third magnet forms a second contact surface.

[0049] According to another embodiment, the free surface of the second magnet is distant from the first contact surface.

[0050] Thus, a clearance is present between the second magnet and the first contact surface. The positioning of the second magnet on the support has no influence on the contact between the support and the electrical equipment. Precise positioning of the first magnet on the support is not necessary to guarantee the accuracy of the positioning of the measuring device relative to the electrical equipment.

[0051] According to another embodiment, the free surface of the third magnet is distant from the second contact surface.

[0052] According to an exemplary embodiment of the measuring device, the sensor comprises a base made of ferromagnetic material.

[0053] According to another exemplary embodiment of the measuring device, the sensor comprises a plastic base.

[0054] According to one embodiment, the first magnet forms one of the three contact surfaces.

[0055] According to an exemplary embodiment of the measuring device, the base of the sensor and the magnet are arranged on either side of a wall of the support.

[0056] The sensor base comprises a flat surface configured to bear on the support.

[0057] The base of the sensor is for example parallelepipedal in shape.

[0058] The support comprises a surface for receiving the sensor.

[0059] According to one embodiment of the measuring device, the support comprises an orifice for passage of a part of the sensor.

[0060] The first magnet for attaching the sensor to the receiving area may have a ring shape.

[0061] A portion of a first face of the wall forms a receiving surface for the sensor.

[0062] A second face of the wall, opposite the first face, is parallel to a free surface of the first magnet for fixing the sensor to the support.

[0063] The passage orifice may surround the first magnet.

[0064] The magnet for fixing the sensor to the receiving area and the passage orifice can be coaxial.

[0065] A plane parallel to the free surface of the third magnet and passing through the free surface of the second magnet passes through the passage orifice of a part of the sensor.

[0066] A plane parallel to the free surface of the second magnet and passing through the free surface of the third magnet also passes through the passage orifice of a part of the sensor.

[0067] Thus, the second magnet and the third magnet guarantee the stability of the measuring device on the electrical equipment.

[0068] The base of the sensor is extended by a cylindrical portion comprising a housing for receiving the first magnet.

[0069] The receiving housing and the first magnet have complementary shapes.

[0070] According to an exemplary embodiment of the measuring device, the sensor comprises a positioning lug and the support comprises a receiving orifice configured to receive the positioning lug so as to block the sensor in rotation relative to the support.

[0071] The orientation of the sensor is thus fixed.

[0072] The positioning lug extends radially from the periphery of the cylindrical portion comprising the housing for receiving the first magnet.

[0073] The receiving orifice may be a notch formed in the periphery of the passage orifice.

[0074] The invention also relates to an assembly of a measuring device and medium voltage electrical equipment, in which the support of the measuring device is fixed to a front of the medium voltage electrical equipment.

[0075] The facade extends, for example, in a substantially vertical plane.

[0076] The facade extends, for example, in a plane forming an angle between 0° and 30° with the vertical direction.

[0077] According to one embodiment, the support is in contact with an upper corner of the facade.

[0078] The medium voltage electrical equipment is, for example, a cell of a medium voltage switchboard for secondary distribution.

[0079] The cell of the medium voltage panel is parallelepiped in shape.

[0080] The invention also relates to a method of mounting a measuring device such as described above to medium voltage electrical equipment. The method may comprise the steps: - providing a support, - provide a sensor configured to detect vibrations, the sensor being integral with the support, - position the measuring device on the medium voltage electrical equipment so that the three contact surfaces of the support are in contact with the receiving area of ​​the medium voltage electrical equipment, so as to fix the measuring device to the medium voltage electrical equipment.

[0081] The step of providing a sensor secured to the support may comprise a sub-step of fixing the sensor to the support. Brief description of the drawings

[0082] Other characteristics, details and advantages will appear on reading the detailed description below, and on analyzing the attached drawings, in which:

[0083] [Fig-1] is a perspective view of a measuring device according to a first embodiment and of medium voltage electrical equipment,

[0084] [Fig.2] is another perspective view of the measuring device of [Fig.l],

[0085] [Fig.3] is an exploded perspective view of a cutting device according to another embodiment,

[0086] [Fig.4] is a schematic front view of a measuring device attached to medium voltage electrical equipment,

[0087] [Fig.5] is a schematic front view of a measuring device attached to other medium voltage electrical equipment,

[0088] [Fig.6] is a partial schematic view of the measuring device of [Fig.2], and of alternative embodiments. Description of the embodiments

[0089] In order to facilitate reading of the figures, the different elements are not necessarily represented to scale. In these figures, identical elements bear the same references. Certain elements or parameters may be indexed, that is to say designated for example by first element or second element, or even first parameter and second parameter, etc. This indexing is intended to differentiate similar, but not identical, elements or parameters. This indexing does not imply a priority of one element or parameter over another and the names may be interchanged. When it is specified that a subsystem comprises a given element, this does not exclude the presence of other elements in this subsystem. Similarly, when it is specified that a subsystem comprises a given element, it is understood that the subsystem comprises at least this element.

[0090] [Fig.4] shows a set of a measuring device 20 and medium voltage electrical equipment 100. The medium voltage electrical equipment voltage 100 is for example a cell of a medium voltage panel for primary distribution or secondary distribution. The cell of the medium voltage switchboard is parallelepiped in shape. The medium voltage electrical equipment 100 comprises a front 90. The front 90 defines a front surface of the electrical equipment 100. The front 90 extends in a substantially vertical plane. More precisely, the facade 90 extends in a plane forming an angle between 0° and 30° with the vertical direction Z.

[0091] In the various figures, the Z axis designates the vertical axis. The X axis designates a transverse direction perpendicular to the lateral surfaces of the equipment 100. The Y axis designates a second transverse direction perpendicular to the facade 90.

[0092] The measuring device 20 comprises a support 1 and a sensor 2 configured to detect vibrations. The sensor 2 is secured to the support 1. The support 1 of the measuring device 20 is fixed to the front 90 of the medium voltage electrical equipment 100.

[0093] The measuring device 20 makes it possible to monitor the operation of the medium-voltage electrical equipment 100. For this, the vibration signal from the sensor 2 is processed by different algorithms, which will not be detailed here. The processing of the signal carried out makes it possible to characterize the operation of the electrical equipment, and in particular to detect operating anomalies. The state of the components of the electrical equipment 100, for example current interruption devices, can thus be characterized. Particular events in the operation of the electrical equipment 100 can also be detected, for example partial discharges. The processing of the vibration signal delivered by the sensor 2 of the measuring device 20 can be carried out in real time or in post-processing.

[0094] Corrective actions may be performed on the electrical equipment 100 in response to a detection of abnormal operation. For example, a maintenance operation to replace or repair damaged components of the electrical equipment may be performed.

[0095] A measuring device 20 is proposed for medium voltage electrical equipment 100, comprising: - a support 1, - a sensor 2 configured to detect vibrations, the sensor 2 being integral with the support 1, - a first magnet 7 configured to fix the measuring device 20 to a receiving zone 50 of the medium voltage electrical equipment 100, in which the support 1 comprises three contact surfaces 4, 5, 6 configured to come into contact with the receiving zone 50 of the medium voltage electrical equipment 100, and in which the three contact surfaces 4, 5, 6 extend in planes PI, P2, P3 intersecting two by two.

[0096] In other words, the three contact surfaces 4, 5, 6 extend in non-parallel planes P1, P2, P3 in pairs. The three contact surfaces 4, 5, 6 thus define a receiving zone forming a spatial reference allowing repeatable positioning of the measuring device 20 on the electrical equipment 100. The first magnet 7 makes it possible to fix the measuring device 20 to the electrical equipment 100 without any modification or alteration of the electrical equipment 100. For example, no drilling or gluing is necessary. The installation of the measuring device for monitoring the operation of the electrical appliance is thus particularly simple.

[0097] The receiving zone 50 comprises three receiving portions 50A, 50B, 50C extending in planes intersecting two by two. The medium voltage electrical equipment 100 shown in [Fig.l] is parallelepiped in shape. The three reception portions 50A, 50B, 50C of the reception zone 50 are thus orthogonal two by two.

[0098] The receiving zone 50 comprises a ferromagnetic material. The receiving zone 50 can thus cooperate with one or more magnets so as to allow the measuring device 20 to be fixed to the medium-voltage electrical equipment 100.

[0099] As shown schematically in [Fig.l], the receiving zone 50 of the medium voltage electrical equipment 100 and a portion of the support 1 have complementary shapes in the illustrated example.

[0100] [Fig.2] illustrates the measuring device 20 separate from the electrical equipment 100. The three contact surfaces 4, 5, 6 are flat here. The three contact surfaces 4, 5, 6 are here orthogonal two by two. The fixing of the measuring device 20 to a parallelepiped-shaped receiving area is thus facilitated.

[0101] The first magnet 7 is configured to hold the measuring device 20 on the receiving zone 50 without slipping during nominal operation of the electrical equipment 100. In other words, the first magnet 7 makes it possible to secure the measuring device 20 and the electrical equipment 100. The measuring device 20 is rigidly connected to the electrical equipment 100, at least for the acceleration values ​​to which the electrical equipment 100 is subjected in normal use.

[0102] According to an exemplary embodiment of the measuring device 20, not shown, the first magnet 7 is integral with the support 1. In other words, the support 1 includes the first magnet 7.

[0103] The support 1 can be made of different materials.

[0104] According to one embodiment, the support 1 is metallic. The support 1 is for example formed by folding a metal strip. For example, the strip is folded in two perpendicular folding directions. The thickness of the metal strip is, for example, between 0.5 millimeters and 3 millimeters. The strip is made of steel, for example.

[0105] According to another embodiment, the support 1 may be made of plastic material. For example, support 1 may be made of acrylonitrile butadiene styrene.

[0106] Sensor 2 is here to be an accelerometer. Sensor 2 is for example a three-axis accelerometer. Sensor 2 thus measures accelerations in three directions in space perpendicular to each other.

[0107] Sensor 2 may be a wireless sensor.

[0108] According to an alternative embodiment not illustrated, the sensor 2 may be a wired sensor.

[0109] The fixing of the sensor 2 on the support 1 can be carried out in different ways.

[0110] According to exemplary embodiments not shown, the support 1 can for example be overmolded on sensor 2. Alternatively, the sensor 2 can be screwed or glued to the support 1. The sensor 2 can be mounted by press-fitting into the support 1.

[0111] [Fig. 3] represents a measuring device 20 in which the sensor 2 is spaced from the support 1. Sensor 2 includes a base 8 made of plastic. The base 8 of the sensor 2 comprises a flat surface 15 configured to bear on the support 1. The support 1 comprises a surface for receiving the sensor 2. A portion of a first face 9 of the wall 10 forms a receiving surface for the sensor 2. When the measuring device 20 is operational, the flat surface 15 of the base 8 of the sensor 2 comes to bear on the first face 9 of the wall 10 of the support 1. The base 8 of the sensor 2 is here of general parallelepiped shape.

[0112] According to another exemplary embodiment of the measuring device 20, the sensor 2 comprises a base 8 made of ferromagnetic material.

[0113] According to the example illustrated, the first magnet 7 forms one of the three contact surfaces 4, 5, 6. The first magnet 7 of the support 1 forms the contact surface 6. More precisely, the free surface 70a of the first magnet 7 forms the contact surface 6. The free surface 70a is in contact with the electrical equipment 100 when the measuring device 20 is mounted on this electrical equipment.

[0114] The base 8 of the sensor 2 and the first magnet 7 are arranged on either side of the wall 10 of the support 1. The support 1 comprises an orifice 12 for the passage of a part of the sensor 2. The passage orifice 12 surrounds the first magnet 7. The first magnet 7 for fixing the sensor 2 to the receiving zone 50 and the passage orifice 12 are coaxial here. The sign DI designates the common axis of the first magnet 7 and the passage orifice 12.

[0115] As shown in [Fig.3], a plane P3a parallel to the free surface 30b of the third magnet 3b and passing through the free surface 30a of the second magnet 3a passes through the orifice 12 for the passage of a part of the sensor 2. In the same way, a plane P3b parallel to the free surface 30a of the second magnet 3a and passing through the free surface 30b of the third magnet 3b also passes through the orifice 12 for the passage of a part of the sensor 2. Thus, the second magnet 3a and the third magnet 3b guarantee the stability of the measuring device 20 on the electrical equipment 100. The first magnet 7 for fixing the sensor 2 to the receiving zone 50 has a ring shape here.

[0116] As shown in [Fig.3], the base 8 of the sensor 2 is extended by a cylindrical portion 16 comprising a receiving housing 17 of the first magnet 7. The receiving housing 17 and the first magnet 7 have complementary shapes. The first magnet 7 is for example glued to the bottom of the receiving housing 17. The wall of the receiving housing 17 surrounds the first magnet 7 and protects it.

[0117] The sensor 2 comprises a positioning lug 13 and the support 1 comprises a receiving orifice 14 configured to receive the positioning lug 13 so as to block the sensor 2 in rotation relative to the support 1. The orientation of sensor 2 relative to support 1 is thus fixed.

[0118] The positioning lug 13 extends radially from the periphery of the cylindrical portion 16 comprising the receiving housing 17 of the first magnet 7. The receiving orifice 14 may be a notch formed in the periphery of the passage orifice 12. The receiving orifice 14 extends radially from the periphery of the passage orifice 12.

[0119] The clearance between the passage orifice 12 and the exterior of the cylindrical portion 16 is sufficient to allow easy insertion of the sensor 2 into the support 1. This clearance is small enough to guarantee the expected level of precision on the radial positioning of sensor 2. Likewise, there is clearance between the positioning lug 13 and the receiving orifice 14. This clearance is also chosen to guarantee the expected angular positioning precision while allowing easy insertion.

[0120] A second face 11 of the wall 10, opposite the first face 9, is parallel to a free surface 70a of the first magnet 7 for fixing the sensor 2 to the support 1.

[0121] The free surface of a magnet is understood to mean a surface which can approach a given element, or come into contact with this given element, and exert an attractive force of magnetic origin on this other element.

[0122] The first magnet 7 comprises a free surface 70a capable of coming into contact with the receiving zone 50C of the electrical equipment 100. The free surface 70a of the first magnet 7 here projects from the second face 11 of the wall 10 along the Y axis. According to an alternative embodiment not illustrated, the free surface 70a of the first magnet 7 is flush with the second face 11 of the wall 10 along the Y axis.

[0123] The second contact surface 5 of the support 1 is in contact with the portion 50B of the receiving zone 50. This portion 50B is substantially horizontal. This second contact surface 5 absorbs the forces created by the weight of the measuring device 20. The first magnet 7 can alone allow the measuring device to be fixed to the medium voltage electrical equipment 100.

[0124] According to the illustrated embodiment, the support 1 comprises a second magnet 3a configured to hold the measuring device 20 on the receiving zone 50 of the medium voltage electrical equipment 100. The second magnet 3a makes it possible to maintain a first contact surface 4 against the receiving portion 50A of the receiving zone 50.

[0125] The second magnet 3a is in this example of cylindrical shape, as illustrated in figures 2 and 3. The second magnet 3a can be flush with a first contact surface 4.

[0126] The second magnet 3a is fixed to the support 1. The second magnet 3a is for example glued to the support 1. The second magnet 3a is for example received in a housing 18a arranged in the thickness of the support 1.

[0127] According to the example illustrated, the support 1 comprises a third magnet 3b configured to hold the measuring device 20 on the receiving zone 50 of the medium voltage electrical equipment 100. The third magnet 3b makes it possible to hold the second contact surface 5 against the receiving portion 50B of the receiving zone 50.

[0128] The second magnet 3a comprises a free surface 30a extending in a plane parallel to a first contact surface 4 of the support 1. The third magnet 3b comprises a free surface 30b extending in a plane parallel to a second contact surface 5 of the support 1. The free surface 30a of the second magnet 3a is distinct from the free surface 30b of the third magnet 3b.

[0129] The free surface 30a of the second magnet 3a and the free surface 30b of the third magnet 3b are thus non-parallel. The second magnet 3a and the third magnet 3b thus generate magnetic forces in transverse directions. The holding force developed by the second magnet 3a and that developed by the third magnet 3b complement the force developed by the first magnet 7 to immobilize the support 1 and the sensor 2. The fixing of the measuring device 20 is improved.

[0130] The position of the support 1 relative to the electrical equipment 100 is defined in a repeatable manner simply by positioning the support 1 on the electrical equipment 100 so that each of the magnets 7, 3a, 3b presses the contact surfaces 4, 5, 6 respectively on the receiving portions 50A, 50B, 50C of the receiving zone 50. The position of the sensor 2 itself being defined in a repeatable manner relative to the support 1, the sensor 2 can be positioned on the electrical equipment 100 in a repeatable manner in a simple and rapid manner, requiring neither tools nor modification of the electrical equipment to be monitored. The detection algorithms developed for a given electrical equipment can be used on other equipment of the same type, without having to adjust their settings. The effort of implementing the detection algorithms is thus reduced.

[0131] The contact surface 4 can be designated by first contact surface 4. Contact surface 5 may be referred to as second contact surface 5. Contact surface 6 may be referred to as third contact surface 6. The terms first, second and third contact surface are arbitrary and the different designations may be interchanged.

[0132] The third magnet 3b is for example cylindrical in shape. The third magnet 3b can be flush with a second contact surface 5. The fixing force, resulting from the interaction between the third magnet 3b and the receiving zone 50 of the medium voltage electrical equipment 100 is thus maximized.

[0133] The third magnet 3b is fixed to the support 1. The third magnet 3b is for example glued to the support 1. The third magnet 3b is for example received in a housing 18b arranged in the thickness of the support 1.

[0134] According to the example illustrated, the free surface 30a of the second magnet 3a forms a first contact surface 4. In other words, the free surface 30a of the second magnet 3a is in contact with the portion 50B of the receiving zone when the measuring device 20 is mounted on the electrical equipment 100.

[0135] In this case, the relative positioning along the X axis of the second magnet 3a with respect to the passage orifice 12 of the sensor 2 is a main factor involved in the relative positioning of the sensor 2 with respect to the reception zone 50 of the medium voltage electrical equipment 100. The precision necessary for the production of the support 1 can thus be reduced, since only the part of the support 1 influencing the position of the second magnet 3a along the X axis must be precise.

[0136] According to the example illustrated, the free surface 30b of the third magnet 3b forms a second contact surface 5. The free surface 30b of the third magnet 3b is in contact with the portion 50C of the receiving zone. As before, the relative positioning along the Z axis of the third magnet 3b with respect to the passage orifice 12 of the sensor 2 is a main factor affecting the relative positioning along the Z axis of the sensor 2 with respect to the reception zone 50.

[0137] According to another embodiment, not illustrated, the free surface 30a of the second magnet 3a is distant from the first contact surface 4. Thus, a clearance is present between the free surface 30a of the second magnet 3a and the first contact surface 4. The free surface 30a of the second magnet 3a is set back from the first contact surface 4. The positioning of the second magnet 3a on the support 1 then has no influence on the location of the contact between the support 1 and the electrical equipment 100. Precise positioning of the second magnet 3a on the support 1 is not necessary to guarantee the accuracy of the positioning of the measuring device 20 relative to the electrical equipment 100.

[0138] In the same way, according to another embodiment not illustrated, the free surface 30b of the third magnet 3b is distant from the second contact surface 5.

[0139] [Fig.6] schematically illustrates the possible positioning of the second magnet 3a relative to the surface of the support 1. In part A of [Fig.6], the free surface 30a of the second magnet 3a projects from the surface of the support 1. The free surface 30a thus forms the first contact surface 4, since the free surface 30a will come into contact with the receiving zone 50 while there remains a clearance between the surface of the support 1 and the receiving zone 50. In part B of [Fig.6], the free surface 30a of the second magnet 3a is flush with the surface of the support 1. The surface of the support 1 and the free surface 30a come into joint contact with the receiving area 50 when the support 1 is mounted on the electrical equipment 100. The free surface 30a and the surface of the support 1 both define the first contact surface 4. In part C of [Fig.6], the free surface 30a of the second magnet 3a is set back from the surface of the support 1. There remains a clearance between the free surface 30a and the receiving zone 50 when the support 1 is mounted on the electrical equipment 100. The free surface 30a is not part of the first contact surface 4. The first contact surface 4 is defined by the surface of the support 1. The same variations also apply to the positioning of the third magnet 3b, and have not been shown.

[0140] According to the embodiment of [Fig.4], the support 1 is in contact with an upper corner 80 of the facade 90. Corner 80 represents the intersection between the three receiving portions 50A, 50B, 50C of the receiving zone 50.

[0141] [Fig. 5] represents another embodiment in which the junction 81 between a side surface and an upper surface of the electrical equipment 100 is curved. This junction 81 does not have a sharp edge. The first magnet 7, the second magnet 3a and the third magnet 3b ensure the positioning of the support 1 in the same way as before. The edge 19 formed by the intersection of the upper face of the support 1 and the lateral face of the support 1 is distant from the junction 81.

[0142] A method of mounting a measuring device 20 as described previously to medium voltage electrical equipment 100 will now be described.

[0143] The method may comprise the steps: - provide support 1, - provide a sensor 2 configured to detect vibrations, the sensor 2 being secured to the support 1, - position the measuring device 20 on the medium voltage electrical equipment 100 so that the three contact surfaces 4, 5, 6 of the support 1 are in contact with the receiving zone 50 of the medium voltage electrical equipment 100. Thus, the measuring device 20 is attached to the medium voltage electrical equipment 100.

[0144] As described above, such an assembly method allows for precise and repeatable assembly. This assembly method is also particularly quick to implement, and does not require any special tools.

[0145] The step of providing a sensor 2 secured to the support 1 may comprise a sub-step of fixing the sensor 2 to the support 1.

Claims

Claims

1. Measuring device (20) for medium voltage electrical equipment (100), comprising: - a support (1), - a sensor (2) configured to detect vibrations, the sensor (2) being integral with the support (1), - a first magnet (7) configured to fix the measuring device (20) on a receiving area (50) of the medium voltage electrical equipment (100), the receiving area (50) comprising three receiving portions (50A, 50B, 50C) extending in planes intersecting two by two, the three receiving portions (50A, 50B, 50C) of the receiving area being orthogonal two by two, in which the support (1) comprises three contact surfaces (4, 5, 6) configured to come into contact with the receiving area (50) of the medium voltage electrical equipment (100), in which the three contact surfaces (4, 5, 6) extend in planes (PI, P2, P3) intersecting two by two, and in which the three contact surfaces (4, 5,6) are orthogonal two by two.,

2. Measuring device (20) according to claim 1, wherein the three contact surfaces (4, 5, 6) are planar.

3. Measuring device (20) according to one of the preceding claims, in which the first magnet (7) is integral with the sensor (2).

4. Measuring device (20) according to one of the preceding claims, wherein the support (1) comprises a second magnet (3a) configured to hold the measuring device (20) on the receiving area (50) of the medium voltage electrical equipment (100), and wherein the second magnet (3a) comprises a free surface (30a) extending in a plane parallel to a first contact surface (4) of the support (1).

5. Measuring device (20) according to the preceding claim, wherein the support (1) comprises a third magnet (3b) configured to hold the measuring device (20) on the receiving area (50) of the medium voltage electrical equipment (100), and wherein the third magnet (3b) comprises a free surface (30b) extending in a plane parallel to a second contact surface (5) of the support (1).

6. Measuring device (20) according to one of the preceding claims, in which the sensor (2) comprises a base (8) made of plastic, in which the first magnet (7) forms one of the three contact surfaces (4, 5, 6), and in which the base (8) of the sensor (2) and the magnet (7) are arranged on either side of a wall (10) of the support (1).

7. Measuring device (20) according to the preceding claim, in which the support (1) comprises an orifice (12) for passage of a part of the sensor (2), and in which the orifice (12) for passage surrounds the first magnet (7).

8. Measuring device (20) according to one of the preceding claims, in which the sensor (2) comprises a positioning lug (13) and the support (1) comprises a receiving orifice (14) configured to receive the positioning lug (13) so as to block the sensor (2) in rotation relative to the support (1).

9. Assembly of a measuring device (20) according to one of the preceding claims and of medium voltage electrical equipment (100), in which the support (1) of the measuring device (20) is fixed to a front (90) of the medium voltage electrical equipment (100).

10. Assembly according to the preceding claim, in which the facade (90) extends in a plane forming an angle between 0° and 30° with the vertical direction.

11. An assembly according to claim 9 or 10, wherein the support (1) is in contact with an upper corner (80) of the facade (90).

12. Method for mounting a measuring device (20) according to one of claims 1 to 8 to medium voltage electrical equipment (100), comprising the steps: - providing a support (1), - providing a sensor (2) configured to detect vibrations, the sensor (2) being integral with the support (1), - positioning the measuring device (20) on the medium voltage electrical equipment (100) so that the three contact surfaces (4, 5,

13. 6) of the support (1) are in contact with the receiving area (50) of the medium voltage electrical equipment (100), so as to fix the measuring device (20) to the medium voltage electrical equipment (100). Method according to the preceding claim, in which the step of providing a sensor (2) secured to the support (1) comprises a sub-step of fixing the sensor (2) to the support (1).

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