• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An earthing switch assembly comprising a fixed contact (18) fixedly mounted in a bore (16) of a cover (6.2), the fixed contact (18) having a longitudinal axis body (Y) of which a first longitudinal portion protrudes from the support and is connected to the earth, the connection area between the first and second portions having a radial projection (26) having a first (26.1) and a second (26.2) annular face inclined with respect to the longitudinal axis (Y). Electrical insulating means, for example in the form of two sleeves (38, 40), are mounted in the bore (16). The inner surface (42, 44) of the sleeves (38, 40) is shaped so as to bear respectively against the first plane (26.1) and the second (26.2) inclined face of the radial projection (26). A clamping plate (50) mounted on the cover (6.2) holds the stationary contact (18) in the bore (16) stationary via the sleeves (38, 40).
    公开号:CH705209B1
    申请号:CH02163/12
    申请日:2011-04-28
    公开日:2016-03-15
    发明作者:Lukas Treier
    申请人:Alstom Technology Ltd；
    IPC主号:
    专利说明:

    Technical field and prior art
    The present invention relates primarily to a crossing for electrical equipment in a metal casing waterproof ("gas-insulated switchgear" in English) medium and high voltage, including three-phase electrical equipment single envelope and a set for earthing switches used in electrical equipment
    The electrical equipment under sealed enclosure are generally provided with earthing switches to ground the conductor or conductors in the metal enclosure, thus ensuring the safety of operators during maintenance and the inspection of the various parts of the apparatus.
    Such earthing switches are for example known from WO 2007/042 548.
    They comprise a fixed earth contact passing through the envelope of the electrical equipment, the end of the earth contact located outside the envelope is connected to the ground, and the end located at the Inside the envelope earth, via a movable contact, a contact, said phase contact, electrically connected to a busbar.
    The assembly of the fixed contact through the casing must be sealed to the dielectric gas under pressure contained in the casing, in addition the fixed earth contact is electrically isolated from the casing.
    However, this contact is subjected to mechanical forces when the moving contact moves and enters the phase contact.
    If the mechanical maintenance of the fixed earth contact is not sufficient, on the one hand the forces can deteriorate the seal between the fixed earth contact and the envelope, and on the other hand the quality of the guide of the The moving contact may be poor, which may lead to premature wear of the moving contact, and deterioration of the contact.
    In WO 2007/042 548, the fixed earth contact is mounted through the casing via an electrical insulating sleeve, a plate and screw system is provided to maintain the fixed earth contact.
    This assembly is complex and applies significant mechanical and dielectric stresses to the sleeve.
    The document FR 1 413 462 describes a fixed contact mounted through the wall of a housing, which is electrically insulated with respect to this housing. The assembly requires a large number of parts.
    It is therefore an object of the present invention to provide a set of earthing switch whose mounting is sealed and ensures a good mechanical support on the envelope, and more generally a crossing for switchgear under metal casing whose sealing of the mounting and the mechanical maintenance on the casing are improved.
    Presentation of the invention
    The stated purpose is reached by a bushing for electrical equipment in metal casing, and more particularly by a set for earthing switch comprising a fixed contact mounted fixed in a bore of a support, the fixed contact having a an elongate body of longitudinal axis, a first longitudinal portion of which projects from the support and is intended to be electrically connected, for example to earth, and a second longitudinal portion intended to be housed in the envelope of the electrical equipment, the zone connection between the first and the second portion having a radial projection, said projection having a first and a second annular face inclined relative to the longitudinal axis.
    Electrical insulating means, for example in the form of two sleeves, are mounted in the bore to isolate the fixed contact of the support.
    The inner surface of the sleeves is shaped to come into plane support respectively against the first and second inclined face of the radial projection. A clamping plate mounted on the support keeps the fixed contact in the bore stationary via the sleeves.
    With the inclination of the faces of the radial projection, the longitudinal clamping force applied by the clamping plate is divided into an axial component and a radial component, which ensures a very good maintenance of the fixed contact in the support both radially and axially.
    The rigidity of the mechanical maintenance of the fixed contact in the casing is increased, which on the one hand avoids soliciting the seal between the fixed contact and the casing and on the other hand ensures a very good contact guiding mobile articulated on the fixed contact.
    In addition, the mounting elements are simple in structure and are few. The assembly is then simplified.
    Advantageously, the sleeve located on the outer side of the casing borders the first portion of the fixed contact over a certain length outside the support, this length can be adjusted to change the withstand voltage of the apparatus electric.
    The present invention therefore relates to a bushing for electrical equipment in a sealed metal envelope filled with a dielectric gas under pressure comprising a conductive element mounted in a support forming a part of the envelope of said apparatus, the support comprising a bore through which the conductive element is mounted, the conductive element comprising an elongate body of longitudinal axis provided on its lateral face with a radial projection, said projection being delimited longitudinally on the one hand by a first annular face inclined relative to to the longitudinal axis and secondly by a second annular face inclined relative to the longitudinal axis, the two faces having opposite inclination orientations, electrical insulation means being mounted in the bore and s' interposing at least between a shoulder of the bore and the conductive element, said means having inclined faces bearing flat against the first and second inclined annular faces of the radial projection, and a clamping plate being mounted on the support and bearing against the electrical insulation means so as to apply a clamping force on the electrical insulation means bearing on the shoulder of the bore.
    The electrical insulation means may comprise a first sleeve of electrical insulating material surrounding a first portion of the conductive element and mounted between the shoulder of the bore and the radial projection, and being provided with a chamfer in plane contact with the first inclined face of the radial projection, and a second sleeve of electrical insulating material surrounding a second portion of the conductive member and mounted between the radial projection and the clamping plate, and being provided with a chamfer in contact plane with the second inclined face of the radial projection.
    Advantageously, the second sleeve comprises a portion of larger outer diameter carrying the chamfer and a small diameter portion bordering the second portion of the conductive member through and beyond the clamping plate.
    The first sleeve also advantageously comprises a ventilation passage passing through the first sleeve from side to side so as to allow a flow of gas between the two longitudinal faces of the first sleeve.
    Advantageously, the inclined faces have an inclination angle with respect to the longitudinal axis of between 30 ° and 60 °, and even more advantageously equal to 45 °. One of the faces could have an angle of inclination of up to 90 °.
    The contact between the conductive element and the second sleeve may be sealed to the dielectric gas and the contact between the second sleeve and the bore may be dielectric gas tight. For this, O-rings are mounted in grooves made in the lateral surface of the conductive element and in contact with the bore of the second sleeve, and / or O-rings are mounted in grooves formed in the lateral surface of the second sleeve in contact with the bore of the support.
    For example, the clamping plate is fixed on the support by means of screws screwed directly into the support. Advantageously, the face of the clamping plate in contact with the second sleeve comprises a recess receiving a portion of the second sleeve projecting from the bore of the support.
    The end of the conductive element to be located outside the envelope of the electrical equipment comprises a flat and a bore through this flat, for mounting a connecting bar.
    The present invention also relates to an assembly for earthing switch having at least one bushing according to the present invention, the conductive element being a fixed contact and having at least one movable contact slidably mounted relative to the contact. fixed, the movable contact being intended to put in electrical contact the fixed contact and a phase contact connected to a current conductor of said electrical equipment.
    The present invention also relates to an assembly for earthing switch for three-phase electrical equipment, comprising three sets according to the present invention.
    The three flats made on the fixed contacts may be substantially in the same plane to allow the attachment of a ground bar.
    The support, forming a cover, advantageously comprises on its outer face two bosses each located between two ends of fixed contacts and provided with a bore for fixing a grounding bar on the support.
    The upper ends of the bosses are for example located substantially in the same plane as the longitudinal end of the second sleeve projecting outside the support and the axial edges of the flats.
    The present invention also relates to a medium or high voltage electrical equipment in a sealed metal envelope filled with dielectric gas under pressure comprising a metal casing and at least one electrical conductor connected to a phase contact, and at least one set according to the present invention, the support being mounted in a sealed manner on the envelope.
    For example, the casing has a generally tubular shape, the support of said assembly being mounted laterally on the casing.
    The present invention also relates to a medium or high voltage three-phase electrical equipment comprising three electrical conductors each connected to a phase contact and an assembly according to the present invention.
    The apparatus comprises for example an earthing bar fixed on the ends of the fixed contacts by means of screw-nut systems.
    The grounding bar can be fixed on the support by screws screwed into the bores of the bosses.
    Brief description of the drawings
    The present invention will be better understood with the aid of the description which follows and the attached drawings in which:<tb> Fig. 1 <SEP> is a longitudinal sectional view of a portion of an earthing switch assembly according to the present invention,<tb> fig. 2 <SEP> is a perspective view of the exterior of a three-phase electrical apparatus having three grounding disconnector assemblies of FIG. 1,<tb> fig. 3 <SEP> is a schematic perspective view of an example of electrical equipment to which the invention may be applied,<tb> fig. 4 <SEP> is a sectional view of an exemplary embodiment of an earthing switch according to the present invention.
    Detailed presentation of embodiments
    The present invention applies to both single-phase earthing switches and three-phase earthing switches.
    In the example shown, the fixed earth contact has a shape of revolution and the elements forming the assembly for earthing switch. This simplifies the realization of the elements and the assembly thereof.
    In FIG. 1, one can see, seen in section, a part of an electrical apparatus 2 according to the present invention at an assembly for earthing switch 4 (Figure 4) according to the present invention.
    In FIG. 2, one can see part of a three-phase electrical equipment according to the present invention from the outside, the latter comprising three sets E1, E2 and E3 according to the present invention.
    In FIG. 3, we can see a schematic representation of an example of three-phase electrical equipment to which the present invention can be applied.
    The electrical equipment 2 comprises a sealed envelope 6 filled with a dielectric gas under pressure, for example sulfur hexafluoride (SF6).
    The electrical equipment 2 comprises, housed in the casing 6, one or more current conductors 8 or busbars, for example high voltage, extending in the direction of the axis X.
    The envelope 6 comprises a first tubular portion 6.1 of longitudinal axis X and a second portion 6.2 forming a lateral cover attached to the tubular portion 6.1. The tubular portion 6.1 has a lateral opening sealed by the side cover 6.2.
    The side cover 6.2, in the example shown, has substantially the shape of a bell.
    It is understood that a plane cover is not beyond the scope of the present invention. In addition, electrical equipment with any other implantation of the earthing switch is not beyond the scope of the present invention.
    The set or sets for earthing switch according to the present invention are mounted through the side cover 6.2. The cover 6.2 is, in the example shown, provided with an annular flange 12 through which the cover 6.2 is fixed on the tubular portion 6.1 via a flange 14 bordering the lateral opening.
    The fixed contacts 18 of the earthing switch protrude from the side cover 6.2.
    It is understood that the assembly for earthing switch according to the present invention can be mounted directly in the casing without pre-mounting on a support.
    The three sets E1, E2, E3 being similar, we will describe in detail only the set E1.
    The assembly for earthing switch E1 is mounted in a bore 16 of longitudinal axis Y through the cover 6.2.
    The cover 6.2 forms a support for mounting the fixed contact.
    The assembly comprises a fixed contact 18 immobilized in the bore 16.
    The bore 16 comprises a first portion of smaller diameter 20 oriented towards the inside of the casing 6 and a second portion of larger diameter 22 facing outwardly of the casing 6, the first 20 and second portion 22 being connected by an annular surface 24 forming a shoulder.
    The earthing switch comprises a fixed contact 18, a movable contact 19 and a phase contact 10 mounted in electrical contact with a current conductor, both visible in FIG. 4.
    The movable contact is intended to make electrical contact the fixed contact 18 and the phase contact, putting the latter and the driver to which it is connected to the ground.
    The fixed contact 18 comprises according to the present invention a radial projection 26 dividing the fixed contact in a first longitudinal portion 28 and a second longitudinal portion 30, the first portion 28 projecting inside the cover 6.2 and the second portion 30 projecting outside the cover 6.2 and intended to be connected to the ground.
    The radial projection 26 is formed geometrically by two truncated cones 32, 34 of longitudinal axis Y, and conical opposite so that they meet at their large bases.
    The truncated cones 32, 34 are delimited by the dotted lines in FIG. 1. Thus, the radial projection 26 has two annular faces 26.1, 26.2 Y axis inclined relative to the Y axis. In practice, the fixed contact is in one piece, for example machined.
    In the example shown, the connection between the two truncated cones 32, 34 is cut so as to form a tubular zone 35 avoiding sharp angles, reducing the risk of injury.
    The assembly E1 also comprises means 36 for electrically isolating the fixed contact 18 of the cover 6.1.
    The means 36 comprise a first sleeve 38 of electrically insulating material, mounted around the first portion 28 of the fixed contact 18 and a second sleeve 40 of electrically insulating material mounted around the second portion of the fixed contact 18.
    The first sleeve 28 will be designated later "inner sleeve" and the second sleeve "outer sleeve".
    The insulating sleeves are for example made of PET (polyethylene terephthalate) epoxy resin or PTFE (polytetrafluoroethylene).
    The inner sleeve 38 has an inner diameter substantially equal to that of the first portion 28 of the fixed contact 18 to allow mounting of the inner sleeve 38 around the first portion 28 with a minimum of play.
    The inner sleeve 38 also comprises an inner chamfer 42 of inclination angle substantially equal to that of the first inclined face 26.1 and substantially equal surface, so that the chamfer 44 is in plane bearing against the first inclined face 26.1.
    In the example shown, the inner sleeve 38 has on its outer face a shoulder 41 bearing against the shoulder 24 of the bore 16. The shoulder 41 connects a portion of larger diameter and a portion of smaller diameter 43 mounted in the smaller diameter portion 20 of the bore 16.
    Advantageously, a ventilation passage 45 is formed in the inner sleeve, its contour partially intersecting the portion 43 and passing right through the larger diameter portion allowing a dielectric gas supply between the various elements and avoiding discharges partial.
    One could consider using an inner sleeve formed only of a washer mounted in the larger diameter portion of the bore and bearing against the shoulder 24 of the bore 16 of the hood.
    The outer sleeve 40 has an inner diameter substantially equal to that of the second portion 30 of the fixed contact 18 to allow mounting of the outer sleeve 40 around the second portion 30 with a minimum of clearance.
    The outer sleeve 40 also comprises an inner chamfer 44 of inclination angle substantially equal to that of the second inclined face 26.2 of the radial projection 26 and of substantially equal surface, so that the chamfer 44 is in plane support against the second inclined face 26.2.
    The outer sleeve 40 has on its outer face a shoulder 48 against which abuts a clamping plate 50.
    The clamping plate 50 has a central orifice 51 for the passage of the fixed contact 18 and the smaller diameter portion 56 of the outer sleeve 40.
    The outer sleeve 40 has a first portion of larger diameter 52 mounted in the larger diameter portion 22 of the bore 16 and a second portion of smaller diameter 56 beyond the shoulder 48, crossing the clamping plate 50 and bordering the portion of the second portion 30 located outside.
    In the example shown, the second portion 30 has a smaller diameter than the first portion 28. With this configuration, the creepage of the surface of the insulating sleeve 40 with the second portion of smaller diameter 56 is greater than that on the insulating sleeve 38 since the sleeve 38, which is inside the casing, is in a clean atmosphere with the insulating gas. Sealing means are provided between the fixed contact 18 and the second sleeve 40.
    For example, it is about two O-rings 58 each mounted in grooves 60 made in the lateral surface of the second portion 30 of the fixed contact 18.
    Sealing means are also provided between the outer sleeve 40 and the larger diameter portion 22 of the bore 16.
    For example, it is about two O-rings 61 mounted in annular grooves 63 formed in the radially outer surface of the larger diameter portion 52 of the outer sleeve 40 and in contact with the inner surface of the portion of larger diameter 22 of the bore 16.
    These sealing means provide a static seal gas.
    It is understood that one could achieve the seals in other locations and in a different manner, for example by means of lip seals, even if such a static seal does not require such seals.
    The inner sleeve 38 which is previously mounted in the bore, the shoulder 41 bearing against the shoulder 24 of the bore 16, and the fixed contact 18 is then introduced into the inner sleeve 38, the first inclined face 26.1 of the radial projection 26 bearing against the chamfer 42 of the inner sleeve 38.
    The outer sleeve 40 is then mounted around the second portion 30 of the fixed contact 18, its chamfer 44 bearing against the second inclined face 26.2 of the radial projection 26.
    The clamping plate 50 is then mounted around the fixed contact 18 and the smaller diameter portion 56 of the outer sleeve 40.
    The clamping plate 50 is fixed on the cover with screws 62, screwed into bores 64 directly made in the cover around the bore. Tightening is effected by pressing between an inner face 66 of the clamping plate 50 and the shoulder 48 of the outer sleeve 40.
    The smaller diameter portion of the second sleeve 40 avoids the electrical bypass of the fixed contact 18 to the clamping plate 50. The length of the second sleeve 40 can be modified to change the holding voltage of the disconnector.
    In the example shown, the sum of the axial dimensions of the larger diameter portions of the inner sleeve 38 and the outer sleeve 40 is greater than the depth of the larger diameter portion 22 of the bore 16.
    The larger diameter portion 52 of the outer sleeve 40 then protrudes from the bore 16.
    The clamping plate 50 has an annular recess 66 housing the end of the larger diameter portion of the outer sleeve 40 protruding from the bore, to reduce the length of the device and therefore its size.
    An assembly in which the bearing face of the clamping plate is flat, or an assembly in which the shoulder 48 of the outer sleeve would be flush with the end of the bore 16 and the bearing face of the clamping plate 51 would be flat does not depart from the scope of the present invention.
    In FIG. 2, one can see an example of connection of fixed contacts of earthing switch assemblies according to the present invention for three-phase electrical equipment.
    The free ends of the second portions 30 of the three fixed contacts 18 comprise a flat 68 and a transverse bore 70 at this flat surface 68.
    The three flats 68 are substantially in the same plane.
    An earthing bar 72 has a rectangular section, or at least has at least one plane lateral face, and is supported by one of its sides against the flats 68.
    The bar 72 is fixed by means of screw-nut systems 73 mounted in the bores 70 of the free ends and bores made in the grounding bar 72.
    In a particularly advantageous manner, the grounding bar 72 is also fixed directly on the cover 6.2. For this, the cover 6.2 has two bosses 74 each provided with a bore, the bores being located between two fixed contacts 18.
    The grounding bar 72 has two through bores aligned with these two bosses 74 allowing the introduction of screws 76 to immobilize the ground bar on the cover.
    Advantageously, the free end of the bosses 74 is aligned with the free end of the smaller diameter portions of the outer sleeves 40 bordering the fixed contacts 18 outside the casing and with the axial faces of the flats. This alignment ensures a stable attachment of the grounding bar 72 and avoids applying a torsion to the fixed contacts 18 due to a cantilever of the grounding bar 72.
    The fixed contact 18 is for example aluminum.
    The clamping plate 50 applies a force along the Y axis by bearing on the outer sleeve 40, and this force is transmitted from the outer sleeve 40 to the fixed contact 18 at the support between the chamfer of the sleeve. outside 40 and the second inclined face 26.2 of the radial projection 26.
    The orthogonal force to the contact surface is then divided into a radial component and an axial component.
    The reaction at the first inclined face 26.1 is also distributed along a radial component and according to an axial component.
    Therefore, the fixed contact 18 is held both axially and transversely via the radial projection 26. The inner sleeve 38 and the outer sleeve 40 are elastically deformed during tightening.
    The fixed contact 18 is then held rigidly in the axial and radial directions.
    Advantageously, the angle of inclination of the first and second inclined faces of the radial projection 26 is between 30 ° and 60, and advantageously equal to 45 °, ensuring a balanced distribution between the radial component and the component. axial. The angle of inclination of the surface 26.1 which is in contact with the inner sleeve 38 can reach 90 °.
    Thus, the stresses applied to the fixed contact 18 during the displacement of the movable contact do not cause or little displacement of the fixed contact 18 because of its rigid or quasi-rigid mechanical support, the sealing of the assembly is then no longer risky. to be damaged. Furthermore, the fixed contact also forming a rigid sliding guide support for the movable contact, the guidance of the movable contact is improved.
    In addition, the electrical insulation between the fixed contact and the casing is made only by the two sleeves 38 and 40, no electrical insulating material, plastic material type, is necessary at the fixing screws of the clamping plate 50.
    These materials tend to flow plastically and be sensitive to aging.
    In addition, the maintenance of the sleeves and the fixed contact according to the present invention are obtained simultaneously and only by the clamping plate and the particular shapes of the elements.
    Furthermore, the elements have relatively simple forms of revolution, allowing simple manufacture thereof and an assembly also simplified.
    In addition, the present invention has the advantage of providing an independent assembly formed of or fixed contacts and the cover thus simplifying the assembly and disassembly. In addition, this pre-assembly of an independent assembly makes it possible to improve the alignment of the contacts.
    Furthermore, the assembly has a significant compactness.
    In addition, the gas seals are made in a simple manner by O-rings relatively robust, which reduces the risk of leakage.
    The shapes and arrangement of the mobile and phase contacts can be of any known type.
    [0115] In FIG. 4, we can see inside the electrical equipment according to the present invention.
    The conductor extends along an axis X along which the current flows and has a lateral contact 10 to allow grounding of the conductor 8, this contact 10 is called phase contact.
    The contact 10 is oriented along an axis Y, orthogonal to the axis X. In the example shown, the contact 10 comprises a housing 12 electrically connected to the conductor 8 and a contact element 15 in the shape of a tulip for receive the end of a contact element of the earthing switch 4.
    The tulip shape is in no way limiting.
    As already described, the earthing switch according to the present invention may comprise three substantially similar assemblies each associated with an electrical conductor 8.
    Only one set will be described in detail.
    The fixed earth contact 18 has a first longitudinal end located outside the casing 6 and a second longitudinal end located inside the casing 6.
    The second portion 28 of the fixed earth contact 18 comprises a housing 80 of Y axis. Therefore, the axis of the housing 80 and the axis of the contact element 10 are aligned. The housing 80 is provided with a peripheral wall 82.
    The moving earth contact 19 has an elongate shape, such as a rod slidably mounted in the housing 80 along the Y axis. The inside diameter of the housing 80 and the outside diameter of the movable contact 19 are chosen from so that the movable contact 19 does not come into contact with the housing 80. For example, the inside diameter of the housing 80 is 1 mm to 4 mm larger than the diameter of the movable contact 19.
    The electrical contact between the fixed contact 18 and the movable contact 19 is obtained by a tulip-shaped contact 84 which is fixed to the open end of the housing 80 of the fixed contact 18. The movable contact 19 is then guided by this contact 84 and mainly by a guide sleeve 88 which will be described later.
    For example, the section of the moving earth contact 19 is circular and the housing 80 has a circular section.
    In the example shown, the moving earth contact 19 has a first longitudinal end 19.1 intended to penetrate into the contact element 15 of the phase contact 10.
    The second longitudinal end of the moving earth contact 19 is mechanically connected to an axial displacement device 86 of the moving earth contact 19 along the Y axis, via the insulating bushing 88 sliding around the fixed contact 18. Advantageously this displacement device 86 is arranged laterally with respect to the earth contact making it possible to reduce the bulk of the assembly.
    With the present invention, the axial retention and the radial retention of the housing 80 are improved ensuring good guidance of the movable contact 19 in the direction of the phase contact 10.
    The mechanical connection between the movable ground contact 19 and the displacement device 86 is lateral. For this, the partition 82 of the housing 80 comprises at least one longitudinal slot 90 through which the moving earth contact 19 is mechanically connected to the displacement device 86.
    In the example shown and advantageously, the partition 82 of the housing 80 has two diametrically opposed longitudinal slots 90 and the second longitudinal end of the moving earth contact 19 has a through bore orthogonal to the Y axis, in which is mounted a pin 94 connected to the displacement device 86.
    This connection provides a balanced mechanical connection.
    The mechanical connection between a pin 94 and the displacement device 86 is obtained, in the example shown, through the electrical insulating sleeve 88 surrounding the fixed earth contact 18 and around which it slides.
    In another alternative embodiment, the earthing switch comprises a fixed earth contact according to the present invention mounted in a mounting plate, and a movable contact along an axis perpendicular to the axis of the earth contact. fixed to electrically connect the fixed earth contact and the phase contact. The movable contact is formed by a rod passing through the fixed earth contact from one side to the other.
    The contact 18 could be implemented for other applications than for a grounding. For example, it could form a conductive element of a signal representative of operating characteristics of metal-enclosed electrical equipment, such as temperature.
    权利要求:
    Claims (19)
    [1]
    1. Passage for electrical equipment (2) in a sealed metal envelope filled with a dielectric gas under pressure comprising a conductor element (18) mounted in a support (6.2) forming part of the envelope (6) of said apparatus, the support (6.2) having a through bore (16) in which the conductive element (18) is mounted, the conductive element (18) having an elongated body of longitudinal axis (Y) provided on its lateral surface with a protrusion radial (26), said projection being delimited longitudinally firstly by a first annular face (26.1) inclined relative to the longitudinal axis (Y) and secondly by a second annular face (26.2) inclined relative to the longitudinal axis (Y), the two faces having opposite inclination orientations, electrical insulation means being mounted in the bore (16) and interposed at least between a shoulder (24) of the bore (16) and the conductive element (18), said means having inclined faces (42, 44) bearing flat against the first (26.1) and second (26.2) inclined annular faces of the radial projection (26), and a clamping plate (50). ) being mounted on the support (6.2) and resting against the electrical insulation means (38, 40) so as to apply a clamping force on the electrical insulation means resting on the shoulder (24) of the bore (16).
    [2]
    2. Crossing for electrical equipment according to claim 1, wherein the electrical insulation means comprise a first sleeve (38) of electrical insulating material surrounding a first portion (28) of the conductive element (18) and mounted between the shoulder (24) of the bore (16) and the radial projection (26), and being provided with a chamfer (42) in plane contact with the first inclined annular face (26.1) of the radial projection (26), and a second sleeve (40) of electrical insulating material surrounding a second portion (30) of the conductive member (18) and mounted between the radial projection (26) and the clamping plate (50), and being provided with a chamfer (44) in plane contact with the second inclined annular face (26.2) of the radial projection (26).
    [3]
    The wiring harness of claim 2, wherein the second sleeve (40) has a larger diameter portion (52) bearing the chamfer (44) and a small diameter portion (56) bordering the second portion (30). ) of the conductive element (18) through and beyond the clamping plate (50).
    [4]
    4. Crossing for electrical equipment according to one of claims 1 to 3, wherein the inclined annular faces (26.1, 26.2) have an inclination angle with respect to the longitudinal axis (Y) between 30 ° to 60 ° , advantageously equal to 45 °.
    [5]
    5. Electrical equipment feedthrough according to claim 2 or 3, wherein the contact between the conductive element (18) and the second sleeve (40) is dielectric gas-tight and the contact between the second sleeve (40) and the bore (16) is dielectric gas tight.
    [6]
    Electrical equipment feedthrough according to Claim 5, in which O-rings (58) are mounted in grooves (60) formed in the lateral surface of the conductive element (18) and in contact with the bore of the second sleeve. (40).
    [7]
    Electrical equipment feedthrough according to Claim 5 or 6, in which O-rings (61) are mounted in grooves (63) formed in the lateral surface of the second sleeve (40) in contact with the bore (16) of the support (6.2).
    [8]
    8. Passage for electrical equipment according to one of claims 1 to 7 and according to claim 2 or 3, wherein the face of the clamping plate (50) in contact with the second sleeve (40) has a recess (66). receiving a portion of the second sleeve (40) projecting from the bore (16) of the support (6.2).
    [9]
    9. Passage for electrical equipment according to one of claims 1 to 8, wherein the end of the conductive element (18) intended to be located outside the envelope (6) of the electrical equipment comprises a flat (68) and a bore (70) passing through this flat (68), for mounting a conductive bar (72).
    [10]
    10. Set for earthing switch having at least one bushing according to one of claims 1 to 9, the conductive element being a fixed contact (18) and having at least one movable contact slidably mounted relative to the fixed contact. the moving contact being intended to make the fixed contact (18) in electrical contact and a phase contact connected to a current conductor of said electrical equipment.
    [11]
    11. Set for earthing switch for three-phase electrical equipment, comprising three sets according to claim 10.
    [12]
    The earthing switch assembly for three-phase switchgear according to claim 11, wherein the three flats (68) are substantially in the same plane and the bar is a ground bar.
    [13]
    13. assembly for earthing switch for three-phase electrical equipment according to claim 12, comprising a single support (6.2) forming a cover, said single support having on its outer face two bosses (74) each located between two contact ends. fixed (18) and provided with a bore for fixing a ground bar (72) on the single support (6.2).
    [14]
    14. The three-phase switchgear assembly according to claim 13, wherein the upper ends of the bosses (74) are located substantially in the same plane as the longitudinal end of the second sleeve (40) projecting from the outside of the single support (6.2) and the axial edges of the flats (68).
    [15]
    15. Medium or high voltage electrical equipment in a sealed metal envelope filled with pressurized dielectric gas comprising a metal envelope (6) and at least one electrical conductor (8) connected to a phase contact, and at least one assembly according to claim 10 mounted tightly on the envelope.
    [16]
    16. Medium or high voltage electrical apparatus according to claim 15, wherein the casing (6) has a generally tubular shape, the single support of said assembly being mounted laterally on the casing.
    [17]
    17. Medium or high voltage three-phase electrical equipment comprising three electrical conductors each connected to a phase contact and an assembly according to one of claims 11 to 14.
    [18]
    18. Medium or high voltage three-phase electrical switchgear according to claim 17, comprising an earthing bar (72) fixed on the ends of the fixed contacts (18) by means of screw-nut systems and a single support (6.2) comprising on its outer surface two bosses (74) each located between two fixed contact ends (18) and provided with a bore for fixing the earthing bar (72) on the support (6.2).
    [19]
    Medium or high-voltage three-phase electrical switchgear according to claim 18, in which the earthing bar (72) is fixed on the single support (6.2) by screws (76) screwed into the bores of the bosses (74). .
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    同族专利:
    公开号 | 公开日
    CN102959816B|2015-12-16|
    FR2959587B1|2012-06-08|
    WO2011135037A1|2011-11-03|
    FR2959587A1|2011-11-04|
    CN102959816A|2013-03-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB871116A|1958-07-07|1961-06-21|Lodge Cottrell Ltd|Improvements in insulator mounting assemblies|
    FR1413462A|1964-10-30|1965-10-08|Felten & Guilleaume Carlswerk|Insulated conductor entry, gas- and liquid-tight, more particularly for enclosures of submarine cable installations|
    DE3034021A1|1980-09-10|1982-03-25|Wilhelm Ritter GmbH & Co, 4600 Dortmund|Connecting elements for medium voltage switchgear - has branches with connector fittings for conductive tubes inside gas filled encapsulating tubes|
    JPH0134487Y2|1981-05-27|1989-10-20|
    JPH0833135A|1994-07-20|1996-02-02|Meidensha Corp|Gas insulated switchgear|
    CH693548A5|1997-12-18|2003-09-30|Siemens Ag|Gas-insulated high-voltage switchgear with a release switch route.|
    FR2892225B1|2005-10-14|2008-09-12|Areva T & D Ag|EAR DISCONNECT AND METHOD FOR MANUFACTURING SUCH EARTH DISCONNECT|EP2961015B1|2014-06-27|2018-11-21|General Electric Technology GmbH|A coupler member for coupling together the casings of two gas-insulated electrical elements|
    CN108199155B|2017-12-15|2019-08-13|国家电网公司|A kind of earthing or grounding means with automatic protection|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR1053264A|FR2959587B1|2010-04-28|2010-04-28|CONNECTOR FOR METALLIC ENVELOPE ELECTRICAL EQUIPMENT AND SET FOR GROUNDING DISCONNECT WITH IMPROVED MECHANICAL RETENTION|
    PCT/EP2011/056766|WO2011135037A1|2010-04-28|2011-04-28|Bushing for an electrical apparatus in a metal casing and assembly for a ground isolator with improved mechanical retention|
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