Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F27/00—Details of transformers or inductances, in general
  • H01F27/02—Casings
  • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R35/00—Flexible or turnable line connectors, i.e. the rotation angle being limited
  • H01R35/04—Turnable line connectors with limited rotation angle with frictional contact members

Definitions

• the invention generally relates to busbars intended to be mounted through an orifice of a wall, in particular a wall of an electrical transformer. More specifically, the invention relates to a bar-pass of the type comprising:
• a lining for holding the conductive bar through a wall, the lining being electrically insulating;
• At least one connector member for electrically connecting the exposed end of the conductor bar to an electrically conductive cable.
• Such a pass-bar is known from the patent application FR 06 04 632, which describes a protective envelope consisting of two half-shells, inside which are housed the exposed end of the conductive bar and the body connector.
• Such an envelope has a significant amount of space. This is particularly troublesome for transformers on which several busbars are installed side by side. It may be difficult to install the protective casing around the exposed end of the bar, since the protective casings of adjacent bars impede the operators. Furthermore, the protective envelope of FR 06 04 632 does not allow to freely orient the conductor cable from the pass-bar. In this context, the invention aims to provide a bar-pass whose installation is easier.
• the invention relates to a bar-pass of the aforementioned type, characterized in that it comprises at least one secondary protection envelope in which is housed the greater part of the connector member, the connector member being capable of occupying a plurality of angular positions about an axis of rotation with respect to the exposed end of the conductive bar, the secondary protective envelope being able to occupy an plurality of angular positions about the same axis of rotation relative to the central protective envelope.
• the bar-pass may also have one or more of the following characteristics, considered individually or in any technically feasible combination:
• the secondary protection envelope has a light, the bar pass comprising an electrically conductive intermediate piece interposed between the connector member and the conductive bar, the intermediate part being engaged in the light of the secondary protective envelope; the intermediate part comprises a part in contact with the conductive bar, and a part in contact with the secondary protection envelope and pressing said secondary protective envelope towards the conductive bar;
• the bar-pass comprises a blocking member extending along the axis of rotation X and designed both to block the connector member relative to the conductive bar in rotation around the axis of rotation X, and for blocking the secondary protection envelope with respect to the central protective envelope rotating around the axis of rotation X;
• the busbar, the connector member, the central protective envelope and the secondary protective envelope have respective orifices aligned through which the locking member is engaged;
• the connector member and the corresponding secondary protective envelope are placed laterally with respect to the conductive bar, a first side of the conductive bar along the axis of rotation X;
• the bar-pass includes a locking member provided both for locking the connector member with respect to the conductive bar in rotation about the axis of rotation X, and for locking the secondary protective envelope with respect to the central protective envelope rotated about the axis of rotation X, the locking member being provided with a head disposed on a second side of the conductive bar along the axis of rotation X opposite the first side, the busbar comprising a protective cover, distinct from the central protective envelope and the secondary protective envelope, inside which is housed the head of the locking member; -
• the busbar comprises a support member interposed between the head and the protective cover and urging the protective cover towards the busbar;
• the bar-pass comprises a second connector member provided for electrically connecting the exposed end of the conductive bar to a second electrically conductive cable, and a second secondary protection envelope, distinct from the central protection envelope and the first envelope; secondary protection, in which is housed the greater part of the second connector member, the second connector member being capable of occupying a plurality of angular positions about said axis of rotation X relative to the exposed end of the conductive bar, the second secondary shielding envelope being capable of occupying a plurality of angular positions around the same axis of rotation X with respect to the main protective envelope, the second connector member and the second corresponding secondary protection envelope being placed laterally with respect to the busbar, on the second side of the con bar ductrice along the axis of rotation X opposite the first;
• the or each secondary protective envelope comprises two half-shells and means for removably fixing the two half-shells to one another;
• the or each secondary protection envelope comprises an outlet tube of the electrically conductive cable, the busbar comprising a flexible sheath capable of being strung astride the outlet tube and the portion of the electrically conductive cable emerging from the tube of exit ;
• the secondary protection envelope is capable of being displaced in rotation with respect to the central protective envelope around a fixed axis coinciding with said axis of rotation of the connector member;
• FIG. 1 is a perspective view of the device of the invention, in the exploded state;
• FIG. 2 is a sectional view of the conductive bar and the retaining liner;
• FIG. 3 is a perspective view of the device of FIG. 1, in the assembled state, considered on one side of the conductive bar;
• FIG. 4 is an exploded perspective view of the device of FIG. 3, considered on an opposite side of the conductive bar, a portion of the protective envelope of the connector member not being shown to show different elements of the pass-bar;
• - Figure 5 is an exploded perspective view similar to that of Figure 1, taken in another direction.
• the busbar 1 shown in Figure 1 is a bushing for allowing the passage of a power line, particularly of high intensity, through the wall of the housing of an electrical transformer.
• the busbar comprises a conductive longitudinal bar 2 that can be engaged through an orifice O of the wall P (FIG. 2), and an electrically insulating holding liner 4 that can be interposed in the orifice O between the busbar 2 and the wall P.
• the conductive bar 2 is rectilinear and has a section with two large opposite sides rectilinear and two small opposite sides rounded or oblong. It is made of non-ferrous material, typically copper.
• the bar 2 may be electrically connected to a low voltage output of the transformer by an inner end 6 disposed on an inner side of the wall P. It has, for this purpose, at least one hole 8 for an electrical connection.
• the bar 2 is also likely to be electrically connected to one or more electrical conductors (not shown) by an outer end 10 disposed on an outer side of the wall P.
• the lining 4 for holding the conductive bar comprises a body 26 and a cover 28 covering the body 26.
• the retaining lining is of the type described in FR 06 04 632.
• the body 26 and the lid 28 are made essentially of thermoplastic material, for example polyamide or polybutidene terephthalate.
• the body 26 is traversed longitudinally from one side by a conduit 30 for receiving the conductive bar 2.
• the lid 28 has a bell-shaped shape and internally delimits a housing 32 for receiving the bulk of the body 26.
• the housing 32 is extended at the upper end of the lid 28 by a passageway 34 of the conductive bar 2.
• light has a section substantially equal to that of the bar
• the body 26 and the cover 28 are adapted to be arranged, as shown in FIG. 1, on the same side of the wall P.
• the body 26 has essentially the shape of a sleeve of internal section very slightly greater than the section of the conductor bar 2.
• the body 26 has externally, in its middle part, a flange 36 bearing on the outer surface of the wall P.
• This flange 36 longitudinally separates the body into a portion intended to be engaged in the orifice O and a portion intended to
• the part of the body 26 engaged in the orifice O has the shape of a collar 38 having external longitudinal stiffening ribs. These ribs are of gradually decreasing height from the flange 36 to the free end of the collar 38.
• the body 26 is defined by a tubular extension 42 of oblong section delimiting the duct 30. A hole not shown is formed in the tubular extension 42. This bore opens into the conduit 30. It is adapted to receive the end of a pin, not shown, for the axial retention of the bar 2. L other end of the pin is received in a bore 44 of the bar 2, aligned with the bore of the extension 42.
• the lid 28 has a tubular wall 46 surrounding the tubular extension 42 of the body.
• This tubular wall 46 has, at its lower end in contact with the outer surface of the wall P, a mounting base 48.
• the base 48 is substantially rectangular in shape with rounded corners. In the corners are formed bores 50 ( Figure 3) for receiving bolts fixing the device 4 on the wall P. reinforcing ribs 52, of triangular shape, connect the exposed surface of the base 48 to the tubular wall
• the pass-bar 1 furthermore comprises:
• a connector 56 provided for electrically connecting the exposed end of the conductive bar to an electrically conductive cable (not shown);
• a shell 64 for protecting the head 66 of the bolt a shell 64 for protecting the head 66 of the bolt.
• the central casing 54 is a plastic sheath, for example polyamide, which covers the exposed end 10 of the conductive bar and the lining
• the base 68 is open towards the wall P. It has a form conjugate with that of the lining 4. Perpendicular to the longitudinal direction, it has a section which widens from the upper part 70.
• the base 68 is for example intended to receive the part of the lining 4 located above the mounting base 48. In a variant, it can also receive the base 48.
• the annular portion 70 has two large circular faces 72 and 74 facing the large faces of the conductive bar. These large faces have at their centers respective circular openings 76.
• the annular portion 70 internally defines a housing of sufficient size to receive the entire exposed end 10 of the conductive bar.
• the secondary protection envelope 58 has a cylindrical portion 78 coaxial with the upper portion 70 of the central envelope, and an outlet tube 80 of the conductive electrical cable.
• the tube 80 is substantially radial with respect to the cylindrical portion 78.
• the portion 78 has at one axial end a circular lumen 82.
• the lumen 82 is formed in the face 84 of the cylindrical portion facing the central casing.
• the face 84 has a diameter substantially equal to that of the large face 72 of the central envelope. It is applied against this face 72, so that the lumen 82 is placed in coincidence with the opening 76.
• the lumen 82 and the opening 76 are of substantially equal diameters.
• the secondary envelope 58 comprises two half-shells 86 and 88 and removable attachment means 90 of the two half-shells to each other.
• the two half-shells 86 and 88 are concave pieces, concavity turned towards each other. They are substantially symmetrical to one another with respect to a mutual contact plane.
• This plane P is a median plane of the cylindrical portion 78, substantially perpendicular to the central axis of said cylindrical portion.
• This contact plane is also a median plane of the cylindrical tube 80, passing through the axis of the tube 80.
• the fastening means 90 typically comprise lugs 92 formed on one of the half-shells and receiving housings 94 formed on the other half-shell.
• the lugs 92 engage in a reversible manner in the housings 94.
• the half-shells may comprise pins 96 intended to be inserted into mortices 98 formed on the other half-shell, in order to stiffen the connection between the two half-shells.
• the connector 56 comprises a barrel 100 for receiving the conductive cable, and a bracket 102 for fixing. A stripped end of the conductive cable is engaged and rigidly fixed inside the barrel 100.
• the barrel 100 is engaged in the tube 80. It has an external diameter less than or equal to the internal diameter of the tube 80.
• the tab 102 has come from material with the barrel 100.
• It comprises at least one flat portion 104 disposed substantially parallel to the large faces of the conductive bar 2. Said flat portion is pierced with an orifice 105 ( Figure 5) aligned with the light 82 and the opening 76 . The tab 102 is engaged in the cylindrical portion 78 of the secondary envelope.
• the intermediate washer 60 is a shoulder washer interposed between the tab 102 and the exposed end 10 of the conductive bar. It is made for example of a cuprous material.
• the washer 60 is coaxial with the annular upper portion 70 of the central envelope. Its central cylindrical portion 106 is engaged through the lumen 82 and the opening 76.
• the collar 108 is provided at an axial end of the washer. It is situated inside the secondary envelope and bears axially against the peripheral edge delimiting the lumen 82.
• the washer 60 is in direct contact by an axial end with the conductive bar 2 and by the opposite axial end bearing the flange. 108 with the tab 102 of the connector. It comprises a central hole 109 for passing the bolt 62.
• the cover 64 has a cylindrical bottom 110 and a cover 112.
• the cylindrical bottom 110 is coaxial with the upper portion 70 of the central envelope.
• the bottom 110 has a circular face 114 facing the face 74 of the central envelope, and of the same diameter as the latter. It has in its center a light 116, of the same diameter as the opening 76 of the face 74, and placed in coincidence therewith.
• the bolt 62 comprises a screw 118 carrying the head 66, oriented along an axis X substantially perpendicular to the major faces 72 and 74 of the upper part of the central envelope.
• the bolt 62 also comprises a nut 120, a shoulder washer 122 and two brake washers 124 and 126.
• the exposed end 10 of the conductive bar has an orifice 128 provided for fixing the connector member.
• the bottom 110 of the cover, the shoulder washer 122, the central casing 54, the conductive bar 2, the secondary casing 58, the shoulder washer 60 and the connector 56 have respective orifices aligned with each other, and more precisely coaxial to each other. These orifices are respectively the light 116 of the hood, the openings 76 of the central envelope, the opening of fixing 128 of the conductive bar, the light 82 of the secondary casing, the central hole 109 of the shoulder washer 60, and the fixing hole 105 of the connector 56.
• the threaded barrel 130 of the screw is engaged through these different orifices, the head 66 of the screw being received inside the bottom 110, and the free end of the screw opposite the head projecting beyond the tab 102, inside the secondary envelope 58
• the nut 120 is screwed onto this free end, with the interposition of the lock washer 126 between the nut and the tab 102.
• the cylindrical central portion 132 of the shoulder washer 122 is engaged in the bottom lumen 116 and in the corresponding opening 76 of the central casing. It bears against a large face of the conductive bar 2.
• the flange 133 of the shoulder washer bears against the bottom area 114 delimiting the peripheral edge of the aperture 116.
• the shoulder washer 122 and the lock washer 124 are threaded onto the threaded shaft 130 of the screw.
• the lock washer 124 is interposed between the head 66 of the screw and the shoulder washer 122.
• the cover 112 closes the cylindrical bottom 110 on a side opposite to the central casing 54. It is for example forced into the cylindrical bottom. 110.
• the cover 112 has radial teeth 138, provided to engage resiliently in an internal groove 140 of the bottom, so as to lock the cover relative to the bottom ( Figure 5).
• the bar pass also includes a flexible sleeve 134 for closing the outlet tube 80.
• the sheath 134 is for example made of silicone.
• the sheath 134 comprises a widened section of diameter substantially corresponding to the diameter of the tube 80, threaded onto the free end of the tube 80. It also has a small diameter section threaded onto the connector area located immediately at the outlet of the tube 80. Thus, the sheath 134 is straddling the tube 80 and the conductor coming out of this tube. It thus creates a seal at the outlet of the tube.
• a collar 136 of any suitable type, makes it possible to rigidly fix the sheath 134 to the tube 80. The method of mounting the pass-bar described above will now be detailed.
• the stripped end of the conductive cable is previously fixed in the barrel 100 of the connector, for example by crimping.
• the conductive bar 2 and the retaining liner 4 are mounted in the orifice O of the transformer wall and fixed to this wall.
• the central casing 54 is arranged to cap the liner and the exposed end 10 of the conductive bar.
• the end 10 is threaded into the opening of the base 68 and pressed inside the central casing until the fixing hole 128 is aligned with the openings 76 of the casing.
• the bottom 110 is placed against the large face 74 of the casing, the shoulder washer 122 and the braked washer 124 are threaded onto the screw 118, and the screw is introduced through the lumen 116, the two openings 76, and the orifice 128 of the conductive bar.
• the half-shell 88 is first mounted on the screw 118 until it bears against the large face 72 of the central casing.
• the follower washer 60, the connector 56, the braked washer 126 and the nut 120 are then successively engaged on the screw 118.
• the connector 56 is then oriented in the desired direction, by pivoting it about the axis X of the screw. 118. To do this, both the connector 56 is rotated relative to the conductive bar 2, and also the half-shell 88 relative to the central casing 54, always around the X axis.
• the nut 120 is then strongly screwed so as to block the connector 56, the half-shell 88, the central casing 54 and the conductive bar 2 relative to one another, in particular to block them in rotation relative to one another. .
• the head 66 of the screw axially urges the shoulder washer 122 towards the conductive bar, the collar 133 of this washer, which in turn urges the bottom 110 against the central casing 54.
• the nut 120 urges the connector 56 against the shoulder washer 60 axially toward the conductive bar, the flange 108 of the washer in turn soliciting the half-shell 88 against the large face 72 of the central envelope.
• the two stepped washers 60 and 122 are thus held in abutment against the conductive bar 2.
• the half-shell 86 of the secondary casing is then fixed to the half-shell 88 by snapping the lugs 92 into the corresponding orifices.
• the sleeve 134 previously threaded on the conductor cable, can then be arranged astride between the outlet tube and the conductive cable, and fixed to the tube 80 by the collar 136.
• the cover 112 is fixed to the bottom 110, by pressing force, and engagement of the teeth 138 in the groove 140 of the bottom.
• the bar pass has two connectors provided for electrically connecting the exposed end 10 of the busbar each to an electrically conductive cable.
• the bar pass also comprises two secondary protection casings 58 and two intermediate shoulder washers 60. It has no protective shell 64 or shoulder washer 122.
• the two connectors and the two secondary protection covers are arranged symmetrically with respect to the central envelope 54.
• One of the two secondary connector / envelope assemblies is located on a first side of the conductive bar along the axis of rotation.
• the other connector / secondary envelope assembly is located on a second side of the conductive bar along the axis of rotation, the second side being opposite the first.
• the nut 120 urges the connector 56 against the shoulder washer 60, the latter urging in turn the half-shell 88 against the large face 72 of the central envelope.
• the head 66 of the screw urges the connector 56 against the shoulder washer 60, the latter in turn soliciting the half-shell 88 against the large face 72 of the central envelope.
• the two connectors 56 and the two secondary envelopes 58 can be freely oriented around the screw, independently of each other. The bar pass described above has many advantages.
• the connector member comprises at least one secondary protection envelope in which is housed the greater part of the connector member, the connector member being capable of occupying a plurality of angular positions around an axis of rotation relative to at the exposed end of the conductive bar, the secondary protective envelope being succeptible to occupy a plurality of angular positions about the same axis of rotation relative to the central protective envelope, it is possible at the time of assembly of freely and easily orient the connector with its protective cover around the axis of rotation. Furthermore, because the exposed end of the bar and the connector have separate protective covers, which are their own, the overall size of the bar pass is reduced. Indeed, the envelope of the exposed end of the conductive bar and the envelope of the connector may have shapes adapted to the wrapped part, following them closer, and therefore reduced volumes.
• the bar pass comprises a single locking member, for locking the connector, the secondary envelope, the central envelope and the bar relative to each other. This makes device mounting particularly easy.
• the angular position of the connector 56 about the X axis can be continuously adjusted, in the sense that the connector 56 can occupy any position in said range and not discrete positions separated by predetermined angles.
• the pass bar is adapted to include connectors whose barrel
• the sheath 134 can create a seal between the tube 80 and the conductive cable, regardless of the diameter of the barrel 100.
• the bar pass described above can have multiple variants. It may have only one connector and one secondary envelope. Alternatively, as described above, it may comprise two connectors and two secondary envelopes, arranged axially on either side of the central envelope 54 and the conductive bar 2.
• the bar pass could also comprise two connectors arranged on the same axial sides of the central envelope, the secondary envelope then having two outlet tubes 80. The two connectors would then be threaded on the screw 118, and both taken between the nut 120 and the shoulder washer 60. Thus, it can be provided on each side of the central envelope 1, 2 or more than 2 connectors each serving an electrical conductor.
• the conductor bar does not necessarily have an oblong section. Its section can be of any type.
• the bar may for example have a circular section.
• the central envelope 54 has a different shape.
• the liner may have a variety of shapes, with the base 68 of the central envelope preferably having a conjugate shape of the portion of the liner capped by the central liner.
• the upper part of the central envelope may not be cylindrical.
• the secondary envelope and the protective cover may not have parts of cylindrical shapes. These parts can be of any shape, provided to allow rotation of the secondary envelope relative to the central envelope.
• the intermediate shoulder washer could be in one piece with the connector.
• the secondary casing is provided large enough to accommodate screws of different lengths.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Connector Housings Or Holding Contact Members (AREA)

Applications Claiming Priority (2)

Publications (2)

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Family Cites Families (4)

• 2008
  • 2008-12-12 FR FR0858542A patent/FR2939956B1/fr active Active
• 2009
  • 2009-12-01 EP EP09802155.3A patent/EP2366189B1/de active Active
  • 2009-12-01 PT PT98021553T patent/PT2366189T/pt unknown
  • 2009-12-01 ES ES09802155.3T patent/ES2666663T3/es active Active
  • 2009-12-01 WO PCT/FR2009/052355 patent/WO2010066984A1/fr not_active Ceased

Non-Patent Citations (1)

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