Measuring device for medium-voltage electrical equipment and assembly thereof and medium-voltage electrical equipment

Abstract

A measuring device (20) for medium-voltage electrical equipment (100) and an assembly thereof with the medium-voltage electrical equipment are proposed, comprising:-a support (1),-a sensor (2) configured to detect vibrations, the sensor (2) being integral with the support (1) wherein the support (1) comprises a first magnet (7) configured to fix the measuring device (20) on a receiving area (5) of the medium-voltage electrical equipment (100), and-a second magnet (8) configured to fix the measuring device (20) on the receiving area (5) of the medium-voltage electrical equipment (100). Wherein the support (1) comprises three contact surfaces (4, 5, 6) configured to be in contact with a receiving area (5) of the medium voltage electrical equipment (100), and wherein the three contact surfaces (4, 5, 6) extend within planes (P1, P2, P3) intersecting one another.

Description

Technical Field

[0001] This utility model relates to the field of medium-voltage electrical equipment, such as a unit for a medium-voltage switchgear for primary and secondary power distribution. Background Technology

[0002] As is well known, the smooth operation of medium-voltage electrical equipment is monitored by analyzing its vibration signals. Therefore, vibration signal analysis makes it possible to detect specific events, such as deterioration of the equipment's structural health or partial discharge within the equipment.

[0003] To obtain vibration signals that represent the operation of medium-voltage electrical equipment, a measuring sensor can be fixed to the equipment.

[0004] Installing such sensors can be challenging. In particular, it is crucial that the acquired vibration signals be reproducible across identical equipment so that the same techniques used to analyze the vibration signals can be applied to the same equipment. Furthermore, the time spent installing the measuring sensors must be limited as much as possible to minimize interference with the operation of electrical equipment. It is also important to avoid impairing the performance of electrical equipment due to the installation of the measuring sensors.

[0005] The purpose of this invention is to provide a solution that makes it possible to meet these different requirements. Utility Model Content

[0006] Therefore, this utility model proposes a measuring device for medium-voltage electrical equipment, comprising:

[0007] - Support components,

[0008] - The sensor, configured to detect vibration, is integrated with the support structure.

[0009] - A first magnet is configured to fix the measuring device to the receiving area of ​​the medium-voltage electrical equipment.

[0010] The support includes three contact surfaces configured to contact the receiving area of ​​the medium-voltage electrical equipment, and the three contact surfaces extend in intersecting planes.

[0011] In other words, the three contact surfaces extend in planes that are not parallel to each other. Therefore, the three contact surfaces define an area that allows the measuring device to be repeatedly positioned on the electrical equipment. The first magnet enables the measuring device to be fixed to the electrical equipment without any modification to the electrical equipment.

[0012] The functions listed in the following paragraphs can be implemented independently of each other, or in any technically possible combination:

[0013] The receiving area may include three receiving portions extending in intersecting planes.

[0014] The receiving area includes ferromagnetic materials.

[0015] The first magnet is configured to hold the measuring device on the receiving area without slipping during normal operation of the electrical equipment.

[0016] The support structure can be made of metal.

[0017] Supports can be formed by bending metal strips.

[0018] The thickness of the metal strip is, for example, between 0.5 mm and 3 mm.

[0019] The metal strip is bent, for example, in two perpendicular bending directions.

[0020] The support structure can be made of plastic.

[0021] The support component can be overmolded onto the sensor.

[0022] The sensor can be fixed to the support with screws or glued on. The sensor can also be installed in the support by press-fitting.

[0023] The sensor can be an accelerometer.

[0024] The sensor is, for example, a triaxial accelerometer.

[0025] The sensor can be a wireless sensor.

[0026] The sensor can also be an energy harvesting sensor. For example, the sensor can be powered by a piezoelectric generator.

[0027] The sensor can be a wired sensor.

[0028] According to an embodiment of the measuring device, the three contact surfaces are flat.

[0029] According to an embodiment of the measuring device, each of the three contact surfaces is orthogonal to the others.

[0030] Therefore, it is convenient to fix the measuring equipment to the parallelepiped-shaped receiving area.

[0031] The three receiving parts of the receiving area can be orthogonal to each other.

[0032] The receiving area and part of the support of medium-voltage electrical equipment have complementary shapes.

[0033] According to an embodiment of the measuring device, the first magnet and the sensor are integrated.

[0034] Therefore, it is beneficial to the mechanical integration of the first magnet.

[0035] In an alternative embodiment of the measuring device, the first magnet and the support are integral. In other words, the support includes the first magnet.

[0036] According to an embodiment of the measuring device, the support includes a second magnet configured to hold the measuring device over the receiving area of ​​the medium-voltage electrical equipment.

[0037] The second magnet can be cylindrical.

[0038] The second magnet can be flush with the first contact surface.

[0039] The second magnet is fixed to the support.

[0040] The second magnet is, for example, bonded to the support.

[0041] According to an embodiment of the measuring device, the support includes a third magnet configured to hold the measuring device over the receiving area of ​​the medium-voltage electrical equipment.

[0042] According to an embodiment of the measuring device, the second magnet includes a free surface extending in a plane parallel to the first contact surface of the support.

[0043] According to an embodiment of the measuring device, the third magnet includes a free surface extending in a plane parallel to the second contact surface of the support.

[0044] Therefore, the free surfaces of the second and third magnets are not parallel. Consequently, the second and third magnets generate a magnetic force in the transverse direction. This improves the fixation of the measuring device.

[0045] The free surface of the second magnet is different from the free surface of the third magnet.

[0046] The third magnet is, for example, cylindrical.

[0047] The third magnet can be flush with the second contact surface.

[0048] Therefore, the fixing force generated by the interaction between the third magnet and the receiving area of ​​the medium-voltage electrical equipment is maximized.

[0049] The third magnet is fixed to the support. For example, the third magnet is bonded to the support.

[0050] According to an embodiment, the free surface of the second magnet forms the first contact surface.

[0051] Therefore, the relative position of the second magnet with respect to the receiving area of ​​the medium-voltage electrical equipment is the only factor involved in the relative position of the support member with respect to the receiving area of ​​the medium-voltage electrical equipment. This allows for a reduction in the precision required to manufacture the support member.

[0052] According to an embodiment, the free surface of the third magnet forms the second contact surface.

[0053] According to another embodiment, the free surface of the second magnet is a certain distance away from the first contact surface.

[0054] Therefore, a gap exists between the second magnet and the first contact surface. The position of the second magnet on the support is independent of the contact between the support and the electrical equipment. It is not necessary to precisely position the first magnet on the support to ensure the accurate positioning of the measuring device relative to the electrical equipment.

[0055] According to another embodiment, the free surface of the third magnet is a certain distance away from the second contact surface.

[0056] According to an example of an embodiment of the measuring device, the sensor includes a base made of a ferromagnetic material.

[0057] In another example of an embodiment of the measuring device, the sensor includes a base made of plastic.

[0058] According to an embodiment, the first magnet forms one of three contact surfaces.

[0059] According to an example of an embodiment of the measuring device, the sensor base and magnet are arranged on either side of the wall of the support.

[0060] The sensor base includes a flat surface configured to be supported on a support.

[0061] The base of the sensor is, for example, a parallelepiped shape.

[0062] The support includes a surface for receiving the sensor.

[0063] According to an embodiment of the measuring device, the support includes a through hole for a portion of the sensor to pass through.

[0064] The first magnet used to fix the sensor to the receiving area can have a ring shape.

[0065] A portion of the first surface of the wall forms a surface for receiving sensors.

[0066] The second side of the wall, which is opposite to the first side, is parallel to the free surface of the first magnet and is used to fix the sensor to the support.

[0067] The through hole can surround the first magnet.

[0068] The magnets used to fix the sensor to the receiving area and through-hole can be coaxial.

[0069] A plane parallel to the free surface of the third magnet and passing through the free surface of the second magnet passes through a through hole for a portion of the sensor to pass through.

[0070] A plane parallel to the free surface of the second magnet and passing through the free surface of the third magnet also passes through a through hole for a portion of the sensor to pass through.

[0071] Therefore, the second and third magnets ensure the stability of the measuring equipment on the electrical equipment.

[0072] The sensor base extends from a cylindrical portion, which includes a receiving housing for receiving a first magnet.

[0073] The receiving housing and the first magnet have complementary shapes.

[0074] According to an example of an embodiment of the measuring device, the sensor includes a positioning lug, and the support includes a receiving aperture configured to receive the positioning lug in a manner that prevents the sensor from rotating relative to the support.

[0075] Therefore, the orientation of the sensor is fixed.

[0076] The positioning lug extends radially from the periphery of the cylindrical portion of the receiving housing that includes a first magnet.

[0077] The receiving hole can be a notch formed around the through hole.

[0078] This utility model also relates to components of measuring equipment and medium-voltage electrical equipment, wherein the support of the measuring equipment is fixed to the front of the medium-voltage electrical equipment.

[0079] The front, for example, extends in a basically vertical plane.

[0080] The front extends, for example, in a plane forming an angle between 0° and 30° with respect to the vertical direction.

[0081] According to an embodiment, the support member contacts the upper corner of the front.

[0082] Medium-voltage electrical equipment is, for example, a unit of medium-voltage switchgear used for secondary power distribution.

[0083] The unit of the medium-voltage switchgear is a parallelepiped shape.

[0084] This utility model also relates to a method for installing the measuring device described above on medium-voltage electrical equipment. The method may include the following steps:

[0085] - Provide support components,

[0086] - A sensor is provided, configured to detect vibration; the sensor and support are integrated.

[0087] - Position the measuring device on the medium-voltage electrical equipment such that the three contact surfaces of the support are in contact with the receiving area of ​​the medium-voltage electrical equipment, thereby fixing the measuring device to the medium-voltage electrical equipment.

[0088] The step of providing a sensor integrated with a support may include a sub-step of fixing the sensor to the support. Attached Figure Description

[0089] Further features, details, and advantages will become apparent by reading the following detailed description and studying the attached figures, in which:

[0090] Figure 1 This is a perspective view of the measuring device and medium-voltage electrical equipment according to the first embodiment.

[0091] Figure 2 yes Figure 1 Another perspective view of the measuring device.

[0092] Figure 3 This is an exploded perspective view of a measuring device according to another embodiment.

[0093] Figure 4 This is a front view of a measuring device fixed to medium-voltage electrical equipment;

[0094] Figure 5 This is a front view of a measuring device fixed to another medium-voltage electrical equipment;

[0095] Figure 6 yes Figure 2 Partial schematic diagram of the measuring device and alternative embodiments. Detailed Implementation

[0096] To facilitate reading the accompanying drawings, various elements are not necessarily shown to scale. In these drawings, the same elements have the same reference numerals. Some elements or parameters may be assigned serial numbers; in other words, they may be designated, for example, as first element or second element, or first parameter and second parameter, and so on. This sequential numbering is intended to distinguish similar but not identical elements or parameters. This sequential numbering does not imply that one element or parameter takes precedence over another, and names are interchangeable. When a subsystem is specified to include a given element, this does not preclude the presence of other elements within that subsystem. Similarly, when a subsystem is specified to include a given element, it should be understood that the subsystem includes at least that element.

[0097] Figure 4The components of measuring device 20 and medium-voltage electrical equipment 100 are shown. Medium-voltage electrical equipment 100 is, for example, a unit of a medium-voltage switchgear for primary or secondary power distribution. The unit of the medium-voltage switchgear is parallelepiped in shape. Medium-voltage electrical equipment 100 includes a front face 90. The front face 90 defines the front surface of electrical equipment 100. The front face 90 extends in a substantially vertical plane. More specifically, the front face 90 extends in a plane forming an angle between 0° and 30° with the vertical direction Z.

[0098] In all the figures, axis Z represents the vertical axis. Axis X represents the lateral direction perpendicular to the side surface of equipment 100. Axis Y represents the second lateral direction perpendicular to the front 90.

[0099] The measuring device 20 includes a support 1 and a sensor 2 configured to detect vibration. The sensor 2 is integrated with the support 1. The support 1 of the measuring device 20 is fixed to the front 90 of the medium-voltage electrical equipment 100.

[0100] The measuring device 20 enables the monitoring of the operation of the medium-voltage electrical equipment 100. For this purpose, the vibration signals from the sensor 2 are processed by various algorithms, which will not be described in detail here. The processing of the generated signals allows for characterization of the operation of the electrical equipment, particularly the detection of anomalies during operation. Therefore, the state of components of the electrical equipment 100 can be characterized, such as the state of current-interrupting devices. Specific events during the operation of the electrical equipment 100 can also be detected, such as partial discharge. The vibration signals transmitted by the sensor 2 of the measuring device 20 can be processed in real time or post-processed.

[0101] In response to the detection of abnormal operation, corrective measures can be taken for the electrical equipment 100. For example, maintenance can be performed to replace or repair damaged parts of the electrical equipment.

[0102] A measuring device 20 for medium-voltage electrical equipment 100 is proposed, comprising:

[0103] - Support component 1,

[0104] - Sensor 2, configured to detect vibration, is integrated with support 1.

[0105] - The first magnet 7 is configured to fix the measuring device 20 on the receiving area 50 of the medium voltage electrical equipment 100.

[0106] The support member 1 includes three contact surfaces 4, 5, and 6, which are configured to contact the receiving area 50 of the medium-voltage electrical equipment 100, and the three contact surfaces 4, 5, and 6 extend within intersecting planes P1, P2, and P3.

[0107] In other words, the three contact surfaces 4, 5, and 6 extend within planes P1, P2, and P3 that are not parallel to each other. These three contact surfaces 4, 5, and 6 thus define a receiving area forming a spatial reference that allows for repeatable positioning of the measuring device 20 on the electrical equipment 100. The first magnet 7 allows the measuring device 20 to be fixed to the electrical equipment 100 without any modification or alteration to the electrical equipment 100. For example, no drilling or bonding is required. The installation of the measuring device makes monitoring the operation of the electrical unit particularly simple.

[0108] The receiving area 50 includes three receiving portions 50A, 50B, and 50C, which extend in intersecting planes. Figure 1 The medium-voltage electrical equipment 100 shown schematically is in the shape of a parallelepiped. Therefore, each of the three receiving portions 50A, 50B, and 50C of the receiving area 50 is orthogonal to each other.

[0109] The receiving area 50 comprises a ferromagnetic material. The receiving area 50 can therefore interact with one or more magnets to allow the measuring device 20 to be fixed to the medium-voltage electrical equipment 100.

[0110] like Figure 1 As schematically shown, in the example illustrated, the receiving area 50 of the medium-voltage electrical equipment 100 and a portion of the support member 1 have complementary shapes.

[0111] Figure 2 The measuring device 20 is shown after being removed from the electrical equipment 100. In this case, the three contact surfaces 4, 5, and 6 are flat. In this case, the three contact surfaces 4, 5, and 6 are each orthogonal to each other. Therefore, it is convenient to fix the measuring device 20 to the parallelepiped-shaped receiving area.

[0112] The first magnet 7 is configured to hold the measuring device 20 on the receiving area 50 without slippage during normal operation of the electrical equipment 100. In other words, the first magnet 7 allows the measuring device 20 and the electrical equipment 100 to be fixed together. The measuring device 20 is rigidly connected to the electrical equipment 100 at least for the acceleration values ​​experienced by the electrical equipment 100 during normal use.

[0113] According to an example (not shown) of an embodiment of the measuring device 20, the first magnet 7 is integral with the support member 1. In other words, the support member 1 includes the first magnet 7.

[0114] Support 1 can be made of various materials.

[0115] According to an embodiment, the support member 1 is made of metal. The support member 1 is formed, for example, by bending a metal strip. The metal strip is bent, for example, in two perpendicular bending directions. The thickness of the metal strip is, for example, between 0.5 mm and 3 mm. The metal strip is, for example, made of steel.

[0116] According to another embodiment, the support member 1 can be made of plastic. For example, the support member 1 can be made of acrylonitrile butadiene styrene.

[0117] In this case, sensor 2 is an accelerometer. Sensor 2 is, for example, a triaxial accelerometer. Therefore, sensor 2 measures acceleration in three spatial directions that are perpendicular to each other.

[0118] Sensor 2 can be a wireless sensor.

[0119] According to an alternative embodiment not shown, sensor 2 may be a wired sensor.

[0120] Sensor 2 can be fixed to support 1 in various ways.

[0121] According to an example embodiment not shown, the support member 1 may, for example, be overmolded onto the sensor 2. Alternatively, the sensor 2 may be fixed to the support member 1 with screws or adhesive. The sensor 2 may be press-fitted into the support member 1.

[0122] Figure 3 A measuring device 20 is shown, in which a sensor 2 is separated from a support 1. The sensor 2 includes a base 8 made of plastic. The base 8 of the sensor 2 includes a flat surface 15, which is configured to be supported on the support 1. The support 1 includes a surface for receiving the sensor 2. A portion of a first surface 9 of a wall 10 forms the surface for receiving the sensor 2. When the measuring device 20 is in operation, the flat surface 15 of the base 8 of the sensor 2 is supported on the first surface 9 of the wall 10 of the support 1. In this case, the base 8 of the sensor 2 is typically parallelepiped in shape.

[0123] According to another embodiment of the measuring device 20, the sensor 2 includes a base 8 made of ferromagnetic material.

[0124] According to the example shown, the first magnet 7 forms one of three contact surfaces 4, 5, and 6. The first magnet 7 of the support 1 forms contact surface 6. More specifically, the free surface 70a of the first magnet 7 forms contact surface 6. When the measuring device 20 is mounted on the electrical equipment 100, the free surface 70a contacts the electrical equipment 100.

[0125] The base 8 of sensor 2 and the first magnet 7 are arranged on both sides of the wall 10 of support member 1. Support member 1 includes a through hole 12 for a portion of sensor 2 to pass through. Through hole 12 surrounds the first magnet 7. The first magnet 7 and through hole 12, used to fix sensor 2 to receiving area 50, are coaxial in this case. The symbol D1 indicates the common axis of the first magnet 7 and through hole 12.

[0126] like Figure 3 As shown, 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 through-hole 12 through which a portion of the sensor 2 passes. Similarly, 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 through-hole 12 through which a portion of the sensor 2 passes. Therefore, the second magnet 3a and the third magnet 3b ensure the stability of the measuring device 20 on the electrical equipment 100. In this case, the first magnet 7 for fixing the sensor 2 to the receiving area 50 has an annular shape.

[0127] like Figure 3 As shown, the base 8 of the sensor 2 extends from a cylindrical portion 16, which includes a receiving housing 17 for receiving a first magnet 7. The receiving housing 17 and the first magnet 7 have complementary shapes. The first magnet 7 is, for example, adhered to the bottom of the receiving housing 17. The walls of the receiving housing 17 surround and protect the first magnet 7.

[0128] The sensor 2 includes a positioning lug 13, and the support 1 includes a receiving hole 14 configured to receive the positioning lug 13 in a manner that prevents the sensor 2 from rotating relative to the support 1. Therefore, the orientation of the sensor 2 relative to the support 1 is fixed.

[0129] The positioning lug 13 extends radially from the periphery of the cylindrical portion 16 of the receiving housing 17, which includes a receiving housing 17 for receiving the first magnet 7. The receiving hole 14 may be a notch formed around the through hole 12. The receiving hole 14 extends radially from the periphery of the through hole 12.

[0130] The gap between the through hole 12 and the outer side of the cylindrical portion 16 is sufficient to allow the sensor 2 to be easily inserted into the support 1. This gap is small enough to ensure the expected level of accuracy in the radial position of the sensor 2. Similarly, there is a gap between the positioning lug 13 and the receiving hole 14. This gap is also chosen to ensure the expected precise angular positioning while allowing for easy insertion.

[0131] The second surface 11 of the wall 10, which is opposite to the first surface 9, is parallel to the free surface 70a of the first magnet 7 and is used to fix the sensor 2 to the support 1.

[0132] "Free surface of a magnet" refers to a surface that can approach or contact a given element and exert a magnetic attraction on that element.

[0133] The first magnet 7 includes a free surface 70a that can contact the receiving area 50C of the electrical equipment 100. In this case, the free surface 70a of the first magnet 7 protrudes from the second surface 11 of the wall 10 along the axis Y. According to an alternative embodiment not shown, the free surface 70a of the first magnet 7 is flush with the second surface 11 of the wall 10 along the axis Y.

[0134] The second contact surface 5 of the support member 1 contacts a portion 50B of the receiving area 50. This portion 50B is substantially horizontal. The second contact surface 5 bears the force generated by the weight of the measuring device 20. The first magnet 7 allows the measuring device to be secured to the medium-voltage electrical equipment 100 independently.

[0135] According to the illustrated embodiment, the support 1 includes a second magnet 3a configured to hold the measuring device 20 on the receiving area 50 of the medium-voltage electrical equipment 100. The second magnet 3a allows the first contact surface 4 to be held against the receiving portion 50A of the receiving area 50.

[0136] like Figure 2 and 3 As shown, in this example, the second magnet 3a is cylindrical. The second magnet 3a can be flush with the first contact surface 4.

[0137] The second magnet 3a is fixed to the support member 1. The second magnet 3a is, for example, bonded to the support member 1. The second magnet 3a is, for example, received in a housing 18a formed within the thickness of the support member 1.

[0138] According to the example shown, the support 1 includes a third magnet 3b, which is configured to hold the measuring device 20 on the receiving area 50 of the medium-voltage electrical equipment 100. The third magnet 3b allows the second contact surface 5 to be held against the receiving portion 50B of the receiving area 50.

[0139] The second magnet 3a includes a free surface 30a extending in a plane parallel to the first contact surface 4 of the support member 1. The third magnet 3b includes a free surface 30b extending in a plane parallel to the second contact surface 5 of the support member 1. The free surface 30a of the second magnet 3a is different from the free surface 30b of the third magnet 3b.

[0140] Therefore, the free surfaces 30a and 30b of the second magnet 3a and the third magnet 3b are not parallel. Consequently, the second magnet 3a and the third magnet 3b generate a lateral magnetic field force. The holding force generated by the second magnet 3a and the third magnet 3b supplements the force generated by the first magnet 7 to secure the support 1 and the sensor 2. This improves the fixation of the measuring device 20.

[0141] The position of the support member 1 relative to the electrical equipment 100 is defined to be repeatable. Simply by positioning the support member 1 on the electrical equipment 100, each magnet 7, 3a, 3b presses its contact surfaces 4, 5, 6 onto the receiving portions 50A, 50B, 50C of the receiving area 50, respectively. Since the position of the sensor 2 is itself defined to be repeatable relative to the support member 1, the sensor 2 can be easily and quickly positioned repeatably on the electrical equipment 100 without requiring any tools or modifications to the electrical equipment to be monitored. The detection algorithm developed for a given item of electrical equipment can be used on other equipment of the same type without adjusting its settings. This reduces the work involved in implementing the detection algorithm.

[0142] Contact surface 4 can be referred to as the first contact surface 4. Contact surface 5 can be referred to as the second contact surface 5. Contact surface 6 can be referred to as the third contact surface 6. The terms first, second, and third contact surfaces are arbitrary, and various names can be used interchangeably.

[0143] The third magnet 3b is, for example, cylindrical. The third magnet 3b can be flush with the second contact surface 5. Therefore, the retaining force generated by the interaction between the third magnet 3b and the receiving area 50 of the medium-voltage electrical equipment 100 is maximized.

[0144] The third magnet 3b is fixed to the support member 1. The third magnet 3b is, for example, bonded to the support member 1. The third magnet 3b is, for example, received in a housing 18b formed within the thickness of the support member 1.

[0145] According to the example shown, the free surface 30a of the second magnet 3a forms the first contact surface 4. In other words, when the measuring device 20 is mounted on the electrical equipment 100, the free surface 30a of the second magnet 3a contacts a portion 50B of the receiving area.

[0146] In this case, the relative position of the axis X of the second magnet 3a with respect to the through hole 12 of the sensor 2 is the main factor involved in the relative position of the sensor 2 with respect to the receiving area 50 of the medium-voltage electrical equipment 100. Since only the part of the support 1 that affects the position of the second magnet 3a along the axis X must be precise, the required precision in the production of the support 1 can be reduced.

[0147] According to the example shown, the free surface 30b of the third magnet 3b forms the second contact surface 5. The free surface 30b of the third magnet 3b is in contact with a portion of the receiving region 50C. As previously mentioned, the relative position of the third magnet 3b with respect to the through-hole 12 of the sensor 2 along the Z-axis is the main factor affecting the relative position of the sensor 2 with respect to the receiving region 50 along the Z-axis.

[0148] According to another embodiment (not shown), the free surface 30a of the second magnet 3a is a certain distance from the first contact surface 4. Therefore, a gap exists 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 retracts from the first contact surface 4. The position of the second magnet 3a on the support 1 has no effect on the contact position between the support 1 and the electrical equipment 100. The precise position of the second magnet 3a on the support 1 is not necessary to ensure the precise positioning of the measuring device 20 relative to the electrical equipment 100.

[0149] Similarly, according to another embodiment not shown, the free surface 30b of the third magnet 3b is a certain distance away from the second contact surface 5.

[0150] Figure 6 The possible position of the second magnet 3a relative to the surface of the support 1 is schematically shown. Figure 6 In part A, the free surface 30a of the second magnet 3a protrudes from the surface of the support 1. The free surface 30a thus forms the first contact surface 4, as it will contact the receiving area 50, while a gap remains between the surface of the support 1 and the receiving area 50. Figure 6 In part B, the free surface 30a of the second magnet 3a is flush with the surface of the support member 1. When the support member 1 is mounted on the electrical equipment 100, the surface of the support member 1 and the free surface 30a together contact the receiving area 50. Both the free surface 30a and the surface of the support member 1 define a first contact surface 4. Figure 6 In part C, the free surface 30a of the second magnet 3a retracts from the surface of the support 1. When the support 1 is mounted on the electrical equipment 100, a gap exists between the free surface 30a and the receiving area 50. The free surface 30a does not form part of the first contact surface 4. The first contact surface 4 is defined by the surface of the support 1. The same alternative applies to the position of the third magnet 3b, which is not shown.

[0151] according to Figure 4 In one embodiment, the support 1 contacts the upper corner 80 of the front 90. The corner 80 represents the intersection point between the three receiving portions 50A, 50B, and 50C of the receiving area 50.

[0152] Figure 5Another embodiment is shown in which the joint 81 between the side and top surfaces of the electrical equipment 100 is curved. This joint 81 has no sharp edges. The first magnet 7, the second magnet 3a, and the third magnet 3b secure the position of the support 1 in the same manner as described above. The edge 19 formed by the intersection of the top surface and the side surface of the support 1 is a distance from the joint 81.

[0153] A method for mounting the measuring device 20 as described above on the medium-voltage electrical equipment 100 will now be described.

[0154] The method may include the following steps:

[0155] - Provide support component 1,

[0156] - A sensor 2 configured to detect vibration is provided; the sensor 2 is integrated with the support member 1.

[0157] - Position the measuring device 20 on the medium-voltage electrical equipment 100 such that the three contact surfaces 4, 5, and 6 of the support 1 are in contact with the receiving area 50 of the medium-voltage electrical equipment 100.

[0158] Therefore, the measuring device 20 is fixed to the medium-voltage electrical equipment 100.

[0159] As mentioned above, this installation method allows for precise and repeatable installation. It is particularly quick to implement and requires no special tools.

[0160] The step of providing the sensor 2 integrated with the support 1 may include the sub-step of fixing the sensor 2 to the support 1.

Claims

1. A measuring device (20) for medium-voltage electrical equipment (100), comprising: - Support component (1), - Sensor (2), configured to detect vibration, said sensor (2) is integral with said support (1), - A first magnet (7) is configured to fix the measuring device (20) onto the receiving area (50) of the medium-voltage electrical equipment (100). The support member (1) is characterized in that it includes three contact surfaces (4, 5, 6), which are configured to contact the receiving area (50) of the medium-voltage electrical equipment (100). Furthermore, the three contact surfaces (4, 5, 6) extend within intersecting planes (P1, P2, P3).

2. The measuring device (20) according to claim 1, characterized in that, The three contact surfaces (4, 5, 6) are flat.

3. The measuring device (20) according to claim 1 or 2, characterized in that, Each of the three contact surfaces (4, 5, 6) is orthogonal to the others.

4. The measuring device (20) according to claim 1 or 2, characterized in that, The first magnet (7) and the sensor (2) are integrated.

5. The measuring device (20) according to claim 1 or 2, characterized in that, The support member (1) includes a second magnet (3a) configured to hold the measuring device (20) on the receiving area (50) of the medium-voltage electrical equipment (100). Furthermore, the second magnet (3a) includes a free surface (30a) extending in a plane parallel to the first contact surface (4) of the support (1).

6. The measuring device (20) according to claim 5. Its features are, The support member (1) includes a third magnet (3b) configured to hold the measuring device (20) on the receiving area (50) of the medium-voltage electrical equipment (100). And the third magnet (3b) therein includes a free surface (30b) extending in a plane parallel to the second contact surface (5) of the support (1).

7. The measuring device (20) according to claim 1 or 2, characterized in that, The sensor (2) includes a base (8) made of plastic. The first magnet (7) forms one of the three contact surfaces (4, 5, 6). Furthermore, the base (8) and magnet (7) of the sensor (2) are arranged on both sides of the wall (10) of the support (1).

8. The measuring device (20) according to claim 7, characterized in that, The support member (1) includes a through hole (12) through which a portion of the sensor (2) passes. Furthermore, the through hole (12) surrounds the first magnet (7).

9. The measuring device (20) according to claim 1 or 2, characterized in that, The sensor (2) includes a positioning lug (13), and the support (1) includes a receiving hole (14) configured to receive the positioning lug (13) to prevent the sensor (2) from rotating relative to the support (1).

10. A component of the measuring device (20) and medium-voltage electrical equipment (100) according to any one of claims 1-9, Its features are, The support (1) of the measuring device (20) is fixed to the front (90) of the medium voltage electrical equipment (100).

11. The component according to claim 10, characterized in that, The front side (90) extends in a plane forming an angle between 0° and 30° with the vertical direction.

12. The component according to claim 10, characterized in that, The support (1) contacts the upper corner (80) of the front (90).

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