EP4095878B1 - Breaking system of an electrical device - Google Patents
Breaking system of an electrical device Download PDFInfo
- Publication number
- EP4095878B1 EP4095878B1 EP22165517.8A EP22165517A EP4095878B1 EP 4095878 B1 EP4095878 B1 EP 4095878B1 EP 22165517 A EP22165517 A EP 22165517A EP 4095878 B1 EP4095878 B1 EP 4095878B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connection tube
- tube
- connection
- accommodating recess
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 description 10
- 238000002788 crimping Methods 0.000 description 7
- 239000003708 ampul Substances 0.000 description 5
- 230000007774 longterm Effects 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 5
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 241000287107 Passer Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
- H01H33/6661—Combination with other type of switch, e.g. for load break switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/6606—Terminal arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
- H01H33/121—Load break switches
- H01H33/125—Load break switches comprising a separate circuit breaker
- H01H33/126—Load break switches comprising a separate circuit breaker being operated by the distal end of a sectionalising contact arm
Definitions
- the present invention relates to the field of switching devices for medium voltage electrical appliances, that is to say from 1 to 52 kV.
- These cut-off devices incorporate vacuum bulbs or even vacuum bulbs. These vacuum bulbs make it possible to cut off the current in the electrical device in a reliable manner, and avoid the creation of an electric arc.
- the movable contact of the main switch drives a pallet mechanically linked to the movable electrode of the vacuum interrupter, and which causes the interrupter to open at empty.
- the pallet includes an electrically conductive plate on which the main switch comes into contact. This plate is electrically connected to the mobile electrode by a connection wire.
- the electrical connection between the plate and the connection wire is generally made by crimping.
- the wafer may comprise a curved portion forming an oblong housing into which the wire is introduced, and this portion is then deformed so as to crimp the wire. In other words, the deformed portion crushes the wire, which provides mechanical support for the wire as well as an electrical connection.
- the plate must have good resistance to the mechanical forces generated by the switch during the current opening phases.
- the plate is thus made of a material with a high elastic limit, for example stainless steel.
- this type of material has a certain spring effect, that is to say that the pressure applied by the plate on the connection wire after crimping tends to relax. This phenomenon limits the contact between the pad and the wire. Over the long term, the quality of the electrical connection between the board and the wire can degrade, which reduces the performance of the current interrupting device.
- the present disclosure aims to provide a solution making it possible to improve the reliability of the electrical connection between the wire and the plate made of a material with a high elastic limit.
- connection tube The electrical connection between the plate and the connection wire involves an intermediate part which is the connection tube.
- the connection tube is arranged in a housing for receiving the plate.
- the wall of the receiving housing and the connection tube are shaped so that the wall exerts an elastic force on the connection tube.
- connection wire is placed inside the connection tube.
- connection wire and the connection tube can be ensured in various ways, for example by crimping the connection tube on the connection wire.
- the wall comprises an elastically deformed zone exerting an elastic holding force on the connection tube.
- the connecting tube is cylindrical.
- the connection tube is for example of circular section.
- the connection tube can be of square section.
- connection tube is made of copper, preferably annealed copper.
- connection tube can also be made of aluminium.
- connection wire is a stranded wire.
- the receiving housing extends along a main axis.
- the main axis of the receiving housing is perpendicular to the axis of rotation around which the switch can pivot.
- the receiving housing is cylindrical.
- the receiving housing has a substantially U-shaped section.
- the plate is metal.
- the wafer is formed in a metal strip.
- the plate may be made of steel, for example stainless steel.
- the thickness of the wafer is between 0.2 millimeters and 1 millimeter.
- the receiving housing has a nominal diameter of between 2 millimeters and 8 millimeters.
- the lead tube is crimped to the lead wire so as to provide electrical contact between the lead tube and the lead wire.
- connection tube comprises a first portion, called a thinned portion, with an outside diameter less than a nominal diameter of the receiving housing and a second portion, called a thickened portion, with an outside diameter greater than the nominal diameter of the reception accommodation, nominal diameter of the receiving housing being the diameter of the largest circle inscribed in a transverse section of the receiving housing, and measured before insertion of the connection tube into the receiving housing.
- connection tube is force-fitted in the receiving housing so that the wall exerts an elastic holding force on the connection tube.
- a radial play is present between the first portion of the connection tube and the wall of the receiving housing, which allows easy insertion of the connecting tube into the receiving housing.
- the wall exerts an elastic holding force at the level of the second portion of the connection tube.
- connection tube comprises a first axial end at which the connection wire comes out of the connection tube and a second axial end opposite the first axial end, and the first portion, called the thinned portion, comprises the second axial end of the tube.
- the connecting tube has a tapered end.
- the tapered end of the connection tube can be formed by a removable sleeve.
- the removable sleeve can be reusable.
- connection tube comprises a tapered portion comprising a large diameter and a small diameter, the small diameter being oriented towards the second axial end of the connection tube.
- connection tube The large diameter of the tapered portion of the connection tube is oriented towards the first axial end of the connection tube.
- the tapered portion includes the second axial end of the connection tube.
- the outer diameter of the first portion of the connection tube is less than the nominal diameter of the receiving housing when the wafer is in the free state.
- there is a radial play between the first portion of the connection tube and the receiving housing so that the introduction of the connection tube into the reception accommodation is easy.
- the radial play decreases until it becomes zero.
- the wall of the receiving housing is pushed back by the tube, so that the wall of the housing exerts an elastic holding force on the connection tube.
- This elastic holding force guarantees a contact pressure between the plate and the connection tube which guarantees the quality of the electrical contact between these two parts.
- the elastic reserve guarantees a substantially constant contact pressure over time, which guarantees long-term reliability.
- connection tube comprises a first portion called the thinned portion and two second portions called the thickened portions, the second portions being adjacent to the first portion and arranged axially on either side of the first portion, and the wall exerts an elastic holding force on the second portions.
- the first portion is formed by crushing the connection tube.
- the first portion called the thinned portion is formed by crushing the connection tube on the connection wire.
- connection tube makes it possible to ensure the electrical connection between the connection wire and the connection tube, as well as the electrical connection between the connection tube and the wafer. In addition, a mechanical holding of the wire in the tube is ensured.
- the second portions called thickened portions are formed together with the first portion called thinned portion, by crushing the connection tube on the connection wire.
- the same operation of crushing the connection tube makes it possible to jointly form the first portion, called thinned portion, and the second portions, called thickened portions.
- connection tube comprises two first portions called thinned portions offset along the axis of the connection tube, the two first portions being separated by a second portion called thickened portion.
- the first two portions are separated by a distance of between 10 millimeters and 20 millimeters.
- the first portion extends axially over a distance of between 50% of the nominal diameter of the tube and 150% of the nominal diameter of the tube.
- the wall of the receiving housing has an opening arranged opposite to the connection tube.
- connection tube comprises a plastically deformed zone, the plastically deformed zone being in contact with the connection wire.
- connection wire and connection tube are ensured by crimping, which gives reliable contact over time.
- the plastically deformed zone in contact with the connection wire is offset axially with respect to the elastically deformed zone of the wall of the receiving housing.
- the wall of the receiving housing comprises a plastically deformed zone, the plastically deformed zone being in contact with a plastically deformed zone of the connection tube.
- the step of local deformation of the connection tube jointly produces a local deformation of the wall of the housing for receiving the plate so as to obtain a retention force of the connection tube in the receiving housing.
- first element or second element or else first parameter and second parameter, etc.
- the purpose of this indexing is to differentiate between similar but not identical elements or parameters. This indexing does not imply a priority of an element, or parameter compared to another and one can interchange the denominations. When it is specified that a device comprises a given element, this does not exclude the presence of other elements in this device.
- the vacuum interrupter 2 is provided for medium voltage electrical equipment, that is to say a voltage between 1 kV and 52 kV.
- the electrical device 1 may for example be a circuit breaker, a disconnector or a switch.
- the vacuum interrupter 2 comprises an envelope forming a sealed vacuum enclosure. By this is meant that the pressure prevailing inside the enclosure is less than 10 -4 millibar.
- the fixed electrode 3 comprises a rod 23 and a contact body extending transversely to the rod.
- the mobile electrode 4 comprises a rod 24 and a contact body extending transversely to the rod.
- the fixed electrode 3 and the mobile electrode 4 are coaxial.
- the mobile electrode 4 is mobile in translation along the axis of the rod 24.
- the main circuit 30 comprises a fixed contact 35.
- the switch 20 is rotatable between a position P1 corresponds to a nominal circulation position electric current in the main circuit 30, illustrated in A on the figure 1 , and a position P2 prohibiting the passage of electric current in the main electrical circuit 30, illustrated at F.
- the switch 20 is then connected to a grounding contact 40. This grounding contact land is optional.
- FIG. 1 schematically describes the successive steps of an operation for opening the main circuit 30.
- the steps from A to F are in chronological order.
- the main switch 20 has initiated its rotation. Electrical contact between switch 20 and fixed contact 35 is still established. An electrical contact between the main switch 20 and the vacuum interrupter 2 is also made. An electric current circulates simultaneously in the main circuit 30 and in the parallel branch comprising the vacuum interrupter 2.
- the main switch 20 has continued its rotation and is no longer in contact with the fixed contact 35. All the current passes through the vacuum interrupter 2.
- the contact of the vacuum interrupter 2 is closed, that is to say that the fixed electrode 3 and the mobile electrode 4 are in contact, which corresponds to a position P1' of the mobile electrode 3.
- the main switch 20 has triggered the opening of the contact, that is to say that the mobile electrode 4 has started to move away from the fixed electrode 3.
- the distance between mobile electrode 4 and fixed electrode 3 is maximum, corresponding to a position P2' of the mobile electrode.
- the current in the vacuum interrupter 2 cuts off.
- the current in the main circuit 30 is thus cut off.
- the main switch 20 has completed its rotational movement and is in contact with the earthing contact 40.
- the first position P1' of the movable electrode 4 is called the closed position of the vacuum interrupter 2.
- the second position P2′ of the mobile electrode 4 is called the open position of the vacuum interrupter 2.
- the second position P2' corresponds to the maximum open position of the vacuum interrupter 2.
- the pallet 5 is driven by the switch 20 during the displacement stroke opening the main circuit 30.
- the pallet 5 is covered with an electrically conductive plate 6.
- the switch 20 comes into contact with the pallet 5 via the plate 6.
- the switch 20 comprises two parallel rods 23, 24, the fixed contact 35 being inserted between these two rods.
- the two rods 23, 24 are visible on the figure 7 .
- the signs 25 and 25' designate the contact zones between the switch 20 and the wafer 6.
- the kinematic connection between the pallet 5 and the movable electrode 4 has not been detailed here.
- the wafer 6 is electrically connected to the mobile electrode 4, so that the electric current can pass through the vacuum interrupter 2, as illustrated by steps B, C and D of the figure 1 . Thus, during these steps, electrical continuity is present between switch 20 and mobile electrode 4.
- the electrical connection between the plate 6 and the connection wire 7 involves an intermediate part which is the connection tube 8.
- the plate 6 comprises a receiving housing 9.
- the connection tube 8 is disposed in the receiving housing 9 of the wafer.
- the wall 10 of the reception housing 9 and the connection tube 8 are shaped so that the wall 10 exerts an elastic force on the connection tube 8.
- the wall 10 of the reception housing 9 is elastically deformable.
- connection wire 7 is placed inside connection tube 8.
- connection wire 7 is secured to the connection tube 8 by crimping.
- connection tube 8 is crimped to the connection wire 7 so as to ensure electrical contact between the connection tube 8 and the connection wire 7.
- the crimped portion of the connection wire 7 is stripped.
- the entire portion 11 of connection wire 7 included inside the connection tube 8 is stripped.
- the connection wire 7 comprises a portion 12 arranged outside the connection tube 8, the portion 12 comprises an insulating sheath.
- Connection wire 7 is a stranded wire.
- the wall 10 comprises an elastically deformed zone 13 exerting an elastic holding force on the connection tube.
- connection tube 8 is cylindrical.
- the connection tube 8 is, in the example shown, of circular section. According to an embodiment not shown, the connection tube 8 can be of square section.
- the connection tube 8 is here made of annealed copper.
- the tube can also be aluminum. These materials provide good electrical conductivity as well as good crimpability.
- Plate 6 is made of metal.
- the wafer 6 is formed in a metal strip.
- Plate 6 can be made of steel, for example stainless steel.
- the thickness of the wafer 6 is between 0.2 and 1 millimeter. The nature of the material and the dimensions of the wafer are chosen so as to have good resistance to repeated shocks of the switch 20 against the wafer 6 when the pallet 5 is driven by the switch.
- the reception housing 9 extends along a main axis D.
- the reception housing 9 is cylindrical.
- the main axis D of the receiving housing 9 is perpendicular to the movement of the switch 20.
- the main axis D of the receiving housing 9 is perpendicular to the axis of rotation around which the switch 20 can pivot.
- the receiving housing 9 has a substantially U-shaped section.
- the receiving housing 9 has a nominal diameter d_nom of between 2 and 8 millimeters.
- the nominal diameter d_nom of the receiving housing 9 is the diameter of the largest circle that can be inscribed in a transverse section S of the receiving housing 9 when the wafer 6 is in the free state, that is to say when the connection tube 8 is not present in the receiving housing 9.
- the free state of the wafer 6 corresponds to the geometry of the wafer 6 before the connecting tube 8 is inserted into the receiving housing 9
- the wall 10 of the receiving housing 9 does not exert any force since no element constrains the wall 10 of the receiving housing 9.
- inscribed circle is meant the largest virtual circle that can be represented in a transverse section S of housing reception 9 without interfering with the walls delimiting the reception housing 9.
- the inscribed circle is shown schematically by the sign C.
- connection tube 8 comprises a first portion 21, called the thinned portion, of outer diameter d21 less than a nominal diameter d_nom of the receiving housing 9 and a second portion 22, called the thickened portion, of outer diameter d22 greater than the nominal diameter d_nom of the receiving housing 9.
- the nominal diameter d_nom of the receiving housing 9 is the diameter of the largest circle inscribed in a transverse section S of the receiving housing 9, and measured before inserting the connection tube 8 into the receiving housing 9.
- connection tube 8 is force-fitted in the receiving housing 9 so that the wall 10 exerts an elastic holding force on the connection tube 8.
- the outer diameter of the first portion 21 of the connection tube 8 is less than the nominal diameter d_nom of the receiving housing 9 when the wafer 6 is in the free state.
- the insertion of the connection tube 8 into the receiving housing 9 is carried out by translating the tube 8 along the direction of its main axis, which is also the direction of the main axis of the housing. As the connection tube 8 is introduced into the receiving housing 9, the radial play decreases until it becomes zero. Once contact has been established between the tube 8 and the wall 10, by continuing to insert the connection tube 8, the wall 10 of the receiving housing 9 is pushed back by the tube 8.
- the wall 10 of the housing 9 exerts an elastic holding force on the connection tube 8.
- This elastic holding force guarantees a contact pressure between the plate 6 and the connection tube 8 which guarantees the quality of the electrical contact between these two parts.
- the elastic reserve guarantees a substantially constant contact pressure in time, which guarantees long-term reliability.
- the elastic holding force is schematized by the sign F22 on the figure 5 .
- the nominal diameter d_nom of the receiving housing 9 is the diameter of the section corresponding to a determined position along the axis of the housing 9. In other words, the nominal diameter d_nom is likely to change along the axis of the housing receiving housing 9. In the case where the receiving housing 9 is cylindrical in shape, the nominal diameter d_nom is constant along the main axis D of the receiving housing 9.
- connection tube 8 comprises a first axial end 15 at which the connection wire 7 comes out of the connection tube 8 and a second axial end 16 opposite the first axial end 15, and the first portion 21, called the thinned portion, includes the second axial end 16 of the tube.
- This embodiment is detailed in the figure 4 and on the figure 10 .
- the first axial end 15 of the tube 8 corresponds to the end at which the wire 7 comes out of the connection tube 8 in order to join the movable electrode 4.
- one end of the connection wire 7 is axially between the first axial end 15 of the connection tube 8 and the second axial end 16 of the connection tube 8.
- one end of the connection wire 7 is contained inside the connection tube 8.
- the connection wire 7 can pass through the connection tube 8 from one axial end 15 to the other axial end 16.
- connection tube 8 has a tapered end.
- the connection tube 8 comprises a tapered portion 14 having a large diameter d2 and a small diameter d1, the small diameter d1 being oriented towards the second axial end 16 of the connection tube 8.
- the small diameter d1 is closer of the second axial end 16 of the tube 8 than of the first axial end 15.
- the large diameter d2 of the frustoconical portion 14 of the connection tube 8 is oriented towards the first axial end 15 of the connection tube 8.
- the large diameter d2 is closer to the first axial end 15 of the tube 8 than the second axial end 16.
- the frustoconical portion 14 may comprise the second axial end 16 of the connection tube 8.
- the connection tube 8 ends with the narrower side of the truncated cone.
- the tube 8 thus has an end in the shape of an ogive.
- the tapered end of the connection tube 8 is formed by a removable sleeve.
- the tube 8 receives for assembly a sleeve which forms a refined portion at the tapered end. The thinned portion is inserted into the tube 8, more precisely into the second axial end of the tube. This added refined portion makes it easy to insert the tube 8 into the receiving housing 9.
- the added refined portion springs axially from the housing, and the removable sleeve can be removed from the tube.
- the outer diameter of the removable sleeve is chosen so as to allow sufficient clamping in the tube to ensure that the sleeve is held in position during assembly of the tube in the housing, and small enough to allow extraction of the removable sleeve. at the end of assembly.
- the removable sleeve can be reused after dismantling.
- the added refined portion allows easy insertion into the receiving housing 9 of a cylindrical tube, which is the simplest form to manufacture.
- connection tube 8 comprises a first portion 21 called thinned portion and two second portions 22, 22 'called thickened portions, the second portions 22, 22' being adjacent to the first portion 21 and arranged axially on either side of the first portion 21, and the wall 10 exerts an elastic holding force on the second portions 22, 22'.
- the first portion 21 called the thinned portion is formed by crushing the connection tube 8. More specifically, the first portion 21 called the thinned portion is formed by crushing the connection tube 8 on the connection wire 7. Otherwise said, the first portion 21 is formed by a flattened part of the connection tube 8. For this, and as schematized on the face 11 and on the figure 12 , a tool 31 of the punch type presses on the wall of the tube 8 by applying a radial force, that is to say perpendicular to the axis D of the tube 8.
- connection tube 8 makes it possible to ensure the electrical connection between the connection wire 7 and the connection tube 8, as well as the electrical connection between the connection tube 8 and the plate 6. more, a mechanical maintenance of the wire 7 in the tube 8 is ensured.
- the second portions 22, 22' called thickened portions are formed together with the first portion 21 called the thinned portion, by crushing the connection tube 8 on the connection wire 7.
- the figure 12 schematically illustrates the result obtained after the operation of crushing the connection tube 8.
- the same operation of crushing the connection tube 8 makes it possible to jointly form the first portion 21, called the thinned portion, and the second portions 22, 22' , say thickened portions.
- the deformation of the wall of the tube 8 in a radial direction is accompanied by a discharge of material in an axial direction.
- the material pushed back during the operation of crushing the tube 8 locally increases the diameter of the connection tube 8 in the zones adjacent to the thinned portion 21 .
- the material is pushed back on each side of the thinned zone, in two opposite directions. Two thickened portions are therefore obtained.
- the thinned portion 21 and the thickened portions 22, 22' are obtained in a single operation of crushing the connection tube 8.
- the punching tool 31 has flanks 32 inclined so as to facilitate the pushing back of the material making it possible to create the thickened portions 22, 22' of the tube 8.
- the end of the tool is for example of trapezoidal shape, as illustrated in the figure 11 .
- the crushing of the connection tube 8 corresponds to a stamping of the connection tube 8.
- connection tube 8 before deformation, is greater than the diameter of the connection wire 7 so as to allow easy introduction of the connection wire 7 into the connection tube 8.
- the deformation of the wall of the connection tube 8 allows to gradually cancel the play between the wall of the tube 8 and the wire 7. By continuing the deformation until the tube is crushed, a compression of the wire 7 inside the deformed wall of the tube 10 is obtained. A relationship electrical connection between the wire 7 and the tube 8 is thus obtained, as well as a mechanical holding of the connecting wire 7.
- the second portions 22, 22' have an outside diameter greater than the nominal diameter d_nom of the receiving housing 9 when the wafer 6 is in the free state.
- the thickened portions 22, 22' have a diameter greater than the nominal diameter d_nom of the receiving housing 9, an elastic holding force is created by the wall 10 of the receiving housing 9.
- the second portions 22, 22', said thickened portions, of the connection tube 8 tend to deform the wall 10 of the receiving housing 9.
- the connection tube 8 comprises two first portions 21, 21' called thinned portions offset along the axis of the connection tube, the two first portions 21, 21' being separated by a second portion 22 called the thickened portion.
- the first two portions 21, 21' are separated by a distance of between 10 millimeters and 20 millimeters. This distance is measured along the axis D.
- the first portion 21 called the thinned portion extends axially over a distance of between 50% of the nominal diameter d_nom of the tube and 150% of the nominal diameter d_nom of the tube.
- the wall 10 of the receiving housing 9 comprises an opening 17 arranged opposite the connection tube 8.
- the opening 17 is opposite the first portion 21, called the thinned portion, of the connection tube 8.
- the opening 17 allows the passage of the tool 31 making it possible to locally deform the connection tube 8.
- the opening 17 makes it possible to deform the connection tube 8 without deforming the wall 10 of the receiving housing 9. force applied by tool 31 is thus fully transmitted to tube 8, which limits the total force to be applied to tool 31.
- the connecting tube 8 comprises a plastically deformed zone 18, the plastically deformed zone 18 being in contact with the connecting wire 7. This characteristic is common to all the embodiments.
- connection wire 7 and the connection tube 8 are ensured by crimping, which gives reliable contact over time.
- Plastically deformed zone 18 of connection tube 8 is in contact with an electrically conductive portion of wire 7.
- a bare part of wire 7 is introduced into connection tube 8 and connection tube 8 is deformed so as to secure the wire 7 and the tube 8 by crimping.
- the plastically deformed zone 18 in contact with the connection wire 7 is offset axially with respect to the elastically deformed zone 13 of the wall 10.
- the plastically deformed zone 18 of the connection tube is offset along the axis of the tube with respect to the elastically deformed zone 13 of the wall 10 of the receiving housing 9.
- the wall 10 of the receiving housing 9 comprises a plastically deformed zone 19, the plastically deformed zone 19 being in contact with a plastically deformed zone 18 of the connection tube 8.
- the wall 10 of the housing 9 and the connection tube 8 are simultaneously deformed. The deformation of the wall 10 of the housing 9 against the tube 8 ensures mechanical retention of the tube 8.
- stage a1 is schematized by part A
- stages c1 and d1 are schematized by parts B and C
- stages b1 and e1 are schematized by part D
- stage f1 is schematized by part E.
- the thick arrow F schematizes the application of the local deformation force of the connection tube 8.
- the tube 8 is introduced with radial play into the receiving housing 9 , and the crushing of the tube 8 creates the thinned portion 21 as well as the thickened portions 22 adjacent. After deformation of the tube, the wall 10 exerts an elastic holding force on the tube 8.
- the step f2 of local deformation of the connection tube 8 jointly produces a local deformation of the wall 10 of the reception housing 9 of the plate 6 so as to obtain a retention force for the connection tube 8 in the reception housing 9.
- the sub-step d2 of force-fitting the connection tube into the receiving housing 9 can also be carried out after the sub-step f2 of deforming the connection tube.
- step e2 of placing wire 7 in tube 8 is performed directly after sub-step c2 of supplying connection tube 8.
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- Push-Button Switches (AREA)
Description
La présente invention se rapporte au domaine des dispositifs de coupure d'appareils électriques à moyenne tension, c'est-à-dire de 1 à 52 kV. Ces dispositifs de coupure intègrent des ampoules à vide ou encore ampoules sous vide. Ces ampoules à vide permettent de couper le courant dans l'appareil électrique de manière fiable, et évitent la création d'arc électrique.The present invention relates to the field of switching devices for medium voltage electrical appliances, that is to say from 1 to 52 kV. These cut-off devices incorporate vacuum bulbs or even vacuum bulbs. These vacuum bulbs make it possible to cut off the current in the electrical device in a reliable manner, and avoid the creation of an electric arc.
Il est connu, notamment par le brevet
Afin de réaliser l'ouverture de l'ampoule à vide, le contact mobile de l'interrupteur principal vient entrainer une palette mécaniquement liée à l'électrode mobile de l'ampoule à vide, et qui provoque l'ouverture de l'ampoule à vide. Afin de permettre un passage du courant électrique dans l'ampoule à vide, une continuité électrique entre l'interrupteur principal et l'électrode mobile de l'ampoule à vide doit être assurée. Pour cela, la palette comprend une plaquette électriquement conductrice sur laquelle l'interrupteur principal vient en contact. Cette plaquette est reliée électriquement à l'électrode mobile par un fil de connexion. La liaison électrique entre la plaquette et le fil de connexion est généralement réalisée par sertissage. Ainsi, la plaquette peut comporter une portion recourbée formant un logement oblong dans laquelle le fil est introduit, et cette portion est ensuite déformée de façon à réaliser un sertissage du fil. Autrement dit, la portion déformée vient écraser le fil, ce qui assure un maintien mécanique du fil ainsi qu'une connexion électrique.In order to open the vacuum interrupter, the movable contact of the main switch drives a pallet mechanically linked to the movable electrode of the vacuum interrupter, and which causes the interrupter to open at empty. To allow passage of electric current in the vacuum interrupter, electrical continuity between the main switch and the mobile electrode of the vacuum interrupter must be ensured. For this, the pallet includes an electrically conductive plate on which the main switch comes into contact. This plate is electrically connected to the mobile electrode by a connection wire. The electrical connection between the plate and the connection wire is generally made by crimping. Thus, the wafer may comprise a curved portion forming an oblong housing into which the wire is introduced, and this portion is then deformed so as to crimp the wire. In other words, the deformed portion crushes the wire, which provides mechanical support for the wire as well as an electrical connection.
La plaquette doit présenter une bonne résistance aux efforts mécaniques générés par l'interrupteur lors des phases d'ouverture du courant. La plaquette est ainsi réalisée dans un matériau à haute limite élastique, par exemple de l'acier inoxydable. Cependant, ce type de matériau présente un certain effet ressort, c'est-à-dire que la pression appliquée par la plaquette sur le fil de connexion après sertissage tend à se relâcher. Ce phénomène limite le contact entre la plaquette et le fil. Sur le long terme, la qualité de la connexion électrique entre la plaquette et le fil peut se dégrader, ce qui diminue la performance du dispositif de coupure du courant.The plate must have good resistance to the mechanical forces generated by the switch during the current opening phases. The plate is thus made of a material with a high elastic limit, for example stainless steel. However, this type of material has a certain spring effect, that is to say that the pressure applied by the plate on the connection wire after crimping tends to relax. This phenomenon limits the contact between the pad and the wire. Over the long term, the quality of the electrical connection between the board and the wire can degrade, which reduces the performance of the current interrupting device.
La présente divulgation vise à fournir une solution permettant d'améliorer la fiabilité de la connexion électrique entre le fil et la plaquette réalisée en matériau à haute limite élastique.The present disclosure aims to provide a solution making it possible to improve the reliability of the electrical connection between the wire and the plate made of a material with a high elastic limit.
A cette fin, l'invention propose un dispositif de coupure d'un appareil électrique, comportant :
- Un interrupteur principal configuré pour être déplacé entre une position de fermeture permettant un passage de courant électrique dans un circuit électrique principal de l'appareil électrique et une position d'ouverture interdisant le passage de courant électrique dans le circuit électrique principal,
- Une ampoule à vide comportant :
- -- Une électrode fixe,
- -- Une électrode mobile, configurée pour se déplacer entre :
- --- une première position, dans laquelle l'électrode fixe et l'électrode mobile sont en contact, et
- --- une deuxième position, dans laquelle l'électrode fixe et l'électrode mobile sont éloignées l'une de l'autre,
- - Une palette mécaniquement liée à l'électrode mobile, configurée pour faire passer l'électrode mobile de la première position à la deuxième position,
- la palette comportant une plaquette électriquement conductrice,
- l'interrupteur principal étant configuré pour entrainer la palette par l'intermédiaire de la plaquette lors du passage de la position de fermeture à la position d'ouverture,
- -- un fil de connexion reliant électriquement la plaquette et l'électrode mobile, le fil de connexion étant en contact électrique avec un tube de connexion disposé dans un logement de réception de la plaquette,
- dans lequel le logement de réception comporte une paroi exerçant un effort élastique de maintien sur le tube de connexion.
- A main switch configured to be moved between a closed position allowing passage of electric current in a main electric circuit of the electrical device and an open position preventing the passage of electric current in the main electric circuit,
- A vacuum interrupter comprising:
- -- A fixed electrode,
- -- A movable electrode, configured to move between:
- --- a first position, in which the fixed electrode and the mobile electrode are in contact, and
- --- a second position, in which the fixed electrode and the mobile electrode are far from each other,
- - A pallet mechanically linked to the mobile electrode, configured to move the mobile electrode from the first position to the second position,
- the pallet comprising an electrically conductive plate,
- the main switch being configured to drive the pallet via the wafer when passing from the closed position to the open position,
- -- a connection wire electrically connecting the wafer and the movable electrode, the connection wire being in electrical contact with a connection tube arranged in a housing for receiving the wafer,
- wherein the receiving housing comprises a wall exerting an elastic holding force on the connection tube.
La liaison électrique entre la plaquette et le fil de connexion fait intervenir une pièce intermédiaire qui est le tube de connexion. Le tube de connexion est disposé dans un logement de réception de la plaquette. La paroi du logement de réception et le tube de connexion sont conformés de sorte que la paroi exerce un effort élastique sur le tube de connexion. Ainsi, un contact robuste est assuré entre le tube de connexion et la plaquette. En effet, l'effort élastique mis en jeu permet notamment de s'affranchir des phénomènes de fluage des divers éléments, comme la palette, contribuant à dégrader la qualité du contact entre les pièces. La fiabilité à long terme du dispositif de coupure est améliorée.The electrical connection between the plate and the connection wire involves an intermediate part which is the connection tube. The connection tube is arranged in a housing for receiving the plate. The wall of the receiving housing and the connection tube are shaped so that the wall exerts an elastic force on the connection tube. Thus, a robust contact is ensured between the connecting tube and the wafer. Indeed, the elastic force involved makes it possible in particular to overcome the creep phenomena of the various elements, such as the pallet, contributing to degrading the quality of the contact between the parts. The long-term reliability of the switching device is improved.
Les caractéristiques listées dans les paragraphes suivant peuvent être mises en oeuvre indépendamment les unes des autres ou selon toutes les combinaisons techniquement possibles :The characteristics listed in the following paragraphs can be implemented independently of each other or in any technically possible combination:
Selon un mode de réalisation du dispositif de coupure, une portion du fil de connexion est disposée à l'intérieur du tube de connexion.According to one embodiment of the cut-off device, a portion of the connection wire is placed inside the connection tube.
Un contact électrique entre le fil de connexion et le tube de connexion peut être assuré de différentes manières, par exemple par sertissage du tube de connexion sur le fil de connexion.An electrical contact between the connection wire and the connection tube can be ensured in various ways, for example by crimping the connection tube on the connection wire.
La paroi comporte une zone élastiquement déformée exerçant un effort élastique de maintien sur le tube de connexion.The wall comprises an elastically deformed zone exerting an elastic holding force on the connection tube.
Le tube de connexion est cylindrique. Le tube de connexion est par exemple de section circulaire. Le tube de connexion peut être de section carrée.The connecting tube is cylindrical. The connection tube is for example of circular section. The connection tube can be of square section.
Le tube de connexion est en cuivre, de préférence en cuivre recuit. Le tube de connexion peut aussi être en aluminium.The connection tube is made of copper, preferably annealed copper. The connection tube can also be made of aluminium.
Ces matériaux assurent une bonne conductivité électrique ainsi qu'une bonne aptitude au sertissage.These materials provide good electrical conductivity as well as good crimpability.
Le fil de connexion est un fil multibrins.The connection wire is a stranded wire.
Le logement de réception s'étend selon un axe principal.The receiving housing extends along a main axis.
L'axe principal du logement de réception est perpendiculaire à l'axe de rotation autour duquel l'interrupteur peut pivoter.The main axis of the receiving housing is perpendicular to the axis of rotation around which the switch can pivot.
Le logement de réception est cylindrique.The receiving housing is cylindrical.
Le logement de réception comporte une section sensiblement en forme de U.The receiving housing has a substantially U-shaped section.
La plaquette est en métal. La plaquette est formée dans un feuillard métallique. La plaquette peut être en acier, par exemple en acier inoxydable.The plate is metal. The wafer is formed in a metal strip. The plate may be made of steel, for example stainless steel.
L'épaisseur de la plaquette est comprise entre 0,2 millimètres et 1 millimètre.The thickness of the wafer is between 0.2 millimeters and 1 millimeter.
Le logement de réception possède un diamètre nominal compris entre 2 millimètres et 8 millimètres.The receiving housing has a nominal diameter of between 2 millimeters and 8 millimeters.
Le tube de connexion est serti au fil de connexion de façon à assurer un contact électrique entre le tube de connexion et le fil de connexion.The lead tube is crimped to the lead wire so as to provide electrical contact between the lead tube and the lead wire.
Selon un aspect de la présente divulgation, le tube de connexion comporte une première portion, dite portion amincie, de diamètre extérieur inférieur à un diamètre nominal du logement de réception et une deuxième portion, dite portion épaissie, de diamètre extérieur supérieur au diamètre nominal du logement de réception, le diamètre nominal du logement de réception étant le diamètre du plus grand cercle inscrit dans une section transverse du logement de réception, et mesuré avant insertion du tube de connexion dans le logement de réception.According to one aspect of the present disclosure, the connection tube comprises a first portion, called a thinned portion, with an outside diameter less than a nominal diameter of the receiving housing and a second portion, called a thickened portion, with an outside diameter greater than the nominal diameter of the reception accommodation, nominal diameter of the receiving housing being the diameter of the largest circle inscribed in a transverse section of the receiving housing, and measured before insertion of the connection tube into the receiving housing.
Selon un mode de réalisation, le tube de connexion est emmanché en force dans le logement de réception de façon à ce que la paroi exerce un effort élastique de maintien sur le tube de connexion.According to one embodiment, the connection tube is force-fitted in the receiving housing so that the wall exerts an elastic holding force on the connection tube.
Un jeu radial est présent entre la première portion du tube de connexion et la paroi du logement de réception, ce qui permet une insertion aisée du tube de connexion dans le logement de réception. La paroi exerce un effort élastique de maintien au niveau de la deuxième portion du tube de connexion.A radial play is present between the first portion of the connection tube and the wall of the receiving housing, which allows easy insertion of the connecting tube into the receiving housing. The wall exerts an elastic holding force at the level of the second portion of the connection tube.
Selon un mode de réalisation, le tube de connexion comporte une première extrémité axiale au niveau de laquelle le fil de connexion sort du tube de connexion et une deuxième extrémité axiale opposée à la première extrémité axiale, et la première portion, dite portion amincie, comprend la deuxième extrémité axiale du tube.According to one embodiment, the connection tube comprises a first axial end at which the connection wire comes out of the connection tube and a second axial end opposite the first axial end, and the first portion, called the thinned portion, comprises the second axial end of the tube.
Par exemple, le tube de connexion comporte une extrémité effilée. L'extrémité effilée du tube de connexion peut être formée par un manchon amovible. Le manchon amovible peut être réutilisable.For example, the connecting tube has a tapered end. The tapered end of the connection tube can be formed by a removable sleeve. The removable sleeve can be reusable.
Selon un exemple de mise en oeuvre du dispositif de coupure, le tube de connexion comporte une portion tronconique comportant un grand diamètre et un petit diamètre, le petit diamètre étant orienté vers la deuxième extrémité axiale du tube de connexion.According to an example of implementation of the cut-off device, the connection tube comprises a tapered portion comprising a large diameter and a small diameter, the small diameter being oriented towards the second axial end of the connection tube.
Le grand diamètre de la portion tronconique du tube de connexion est orienté vers la première extrémité axiale du tube de connexion.The large diameter of the tapered portion of the connection tube is oriented towards the first axial end of the connection tube.
La portion tronconique comprend la deuxième extrémité axiale du tube de connexion.The tapered portion includes the second axial end of the connection tube.
Le diamètre extérieur de la première portion du tube de connexion est inférieur au diamètre nominal du logement de réception lorsque la plaquette est à l'état libre. Ainsi, il existe un jeu radial entre la première portion du tube de connexion et le logement de réception, de sorte que l'introduction du tube de connexion dans le logement de réception est aisée. Au fur et à mesure de l'introduction du tube de connexion dans le logement de réception, le jeu radial diminue jusqu'à devenir nul. En poursuivant l'insertion du tube de connexion, la paroi du logement de réception est repoussée par le tube, de sorte que la paroi du logement exerce un effort élastique de maintien sur le tube de connexion. Cet effort élastique de maintien garantit une pression de contact entre la plaquette et le tube de connexion qui garantit la qualité du contact électrique entre ces deux pièces. La réserve élastique garantit une pression de contact sensiblement constante dans le temps, ce qui garantit la fiabilité à long terme.The outer diameter of the first portion of the connection tube is less than the nominal diameter of the receiving housing when the wafer is in the free state. Thus, there is a radial play between the first portion of the connection tube and the receiving housing, so that the introduction of the connection tube into the reception accommodation is easy. As the connection tube is introduced into the receiving housing, the radial play decreases until it becomes zero. By continuing to insert the connection tube, the wall of the receiving housing is pushed back by the tube, so that the wall of the housing exerts an elastic holding force on the connection tube. This elastic holding force guarantees a contact pressure between the plate and the connection tube which guarantees the quality of the electrical contact between these two parts. The elastic reserve guarantees a substantially constant contact pressure over time, which guarantees long-term reliability.
Selon un mode de réalisation du dispositif de coupure, le tube de connexion comporte une première portion dite portion amincie et deux deuxième portions dite portions épaissies, les deuxième portions étant adjacentes à la première portion et disposées axialement de part et d'autre de la première portion, et la paroi exerce un effort élastique de maintien sur les deuxième portions.According to one embodiment of the cut-off device, the connection tube comprises a first portion called the thinned portion and two second portions called the thickened portions, the second portions being adjacent to the first portion and arranged axially on either side of the first portion, and the wall exerts an elastic holding force on the second portions.
La première portion dite portion amincie est formée par écrasement du tube de connexion.The first portion, called the thinned portion, is formed by crushing the connection tube.
Selon un exemple de mise en oeuvre, la première portion dite portion amincie est formée par écrasement du tube de connexion sur le fil de connexion.According to an exemplary implementation, the first portion called the thinned portion is formed by crushing the connection tube on the connection wire.
Ainsi, une unique opération d'écrasement du tube de connexion permet d'assurer la liaison électrique entre le fil de connexion et le tube de connexion, ainsi que la liaison électrique entre le tube de connexion et la plaquette. De plus, un maintien mécanique du fil dans le tube est assuré.Thus, a single operation of crushing the connection tube makes it possible to ensure the electrical connection between the connection wire and the connection tube, as well as the electrical connection between the connection tube and the wafer. In addition, a mechanical holding of the wire in the tube is ensured.
Les deuxième portions dite portions épaissies sont formées conjointement à la première portion dite portion amincie, par écrasement du tube de connexion sur le fil de connexion.The second portions called thickened portions are formed together with the first portion called thinned portion, by crushing the connection tube on the connection wire.
Une même opération d'écrasement du tube de connexion permet de former conjointement la première portion, dite portion amincie, et les deuxième portions, dites portions épaissies.The same operation of crushing the connection tube makes it possible to jointly form the first portion, called thinned portion, and the second portions, called thickened portions.
Le tube de connexion comporte deux premières portions dites portions amincies décalées le long de l'axe du tube de connexion, les deux premières portions étant séparées par une deuxième portion dite portion épaissie.The connection tube comprises two first portions called thinned portions offset along the axis of the connection tube, the two first portions being separated by a second portion called thickened portion.
Les deux premières portions sont distantes d'une distance comprise entre 10 millimètres et 20 millimètres.The first two portions are separated by a distance of between 10 millimeters and 20 millimeters.
La première portion dite portion amincie s'étend axialement sur une distance comprise entre 50% du diamètre nominal du tube et 150% du diamètre nominal du tube.The first portion, called the thinned portion, extends axially over a distance of between 50% of the nominal diameter of the tube and 150% of the nominal diameter of the tube.
La paroi du logement de réception comporte une ouverture disposée en vis en vis du tube de connexion.The wall of the receiving housing has an opening arranged opposite to the connection tube.
Selon un mode de réalisation du dispositif de coupure, le tube de connexion comporte une zone plastiquement déformée, la zone plastiquement déformée étant en contact avec le fil de connexion.According to one embodiment of the cut-off device, the connection tube comprises a plastically deformed zone, the plastically deformed zone being in contact with the connection wire.
Le contact électrique entre le fil de connexion et le tube de connexion est assuré par sertissage, ce qui donne un contact fiable dans le temps.The electrical contact between the connection wire and the connection tube is ensured by crimping, which gives reliable contact over time.
La zone plastiquement déformée en contact avec le fil de connexion est décalée axialement par rapport à la zone élastiquement déformée de la paroi du logement de réception.The plastically deformed zone in contact with the connection wire is offset axially with respect to the elastically deformed zone of the wall of the receiving housing.
Selon un mode de réalisation, la paroi du logement de réception comporte une zone plastiquement déformée, la zone plastiquement déformée étant en contact avec une zone plastiquement déformée du tube de connexion.According to one embodiment, the wall of the receiving housing comprises a plastically deformed zone, the plastically deformed zone being in contact with a plastically deformed zone of the connection tube.
La divulgation se rapporte aussi à un appareil électrique comportant :
- un interrupteur principal d'un circuit principal,
- un dispositif de coupure tel que décrit précédemment,
- a main switch of a main circuit,
- a cut-off device as described above,
La divulgation concerne également un procédé de fabrication d'un dispositif de coupure tel que décrit précédemment, comportant les étapes :
- fournir une palette comportant une plaquette électriquement conductrice, la plaquette comportant un logement de réception, le logement de réception comportant une paroi élastiquement déformable,
- fournir un fil de connexion,
- fournir un tube de connexion,
- placer le tube de connexion dans le logement de réception de la plaquette de la palette,
- placer le fil dans le tube de connexion,
- déformer localement le tube de connexion de façon à créer une portion amincie et au moins une portion épaissie,
- providing a pallet having an electrically conductive wafer, the wafer having a receiving housing, the receiving housing comprising an elastically deformable wall,
- provide a connection wire,
- provide connection tube,
- place the connection tube in the receiving housing of the plate of the pallet,
- place the wire in the connection tube,
- locally deforming the connection tube so as to create a thinned portion and at least one thickened portion,
La divulgation se rapporte aussi à un procédé de fabrication d'un dispositif de coupure tel que décrit précédemment, comportant les étapes :
- fournir une palette comportant une plaquette électriquement conductrice, la plaquette comportant un logement de réception, le logement de réception comportant une paroi élastiquement déformable,
- fournir un fil de connexion,
- fournir un tube de connexion, le tube de connexion comportant une première portion de diamètre extérieur inférieur au diamètre nominal du logement de réception de la plaquette préalablement fournie et une deuxième portion de diamètre extérieur supérieur au diamètre nominal du logement de réception de la plaquette préalablement fournie,
- emmancher de force le tube de connexion dans le logement de réception de la plaquette de la palette de façon à ce que la paroi du logement de réception de la plaquette exerce un effort élastique de maintien sur la deuxième portion du tube de connexion,
- placer le fil dans le tube de connexion,
- déformer localement le tube de connexion de façon à obtenir un effort de rétention du fil de connexion dans le tube de connexion.
- providing a pallet comprising an electrically conductive wafer, the wafer comprising a reception housing, the reception housing comprising an elastically deformable wall,
- provide a connection wire,
- providing a connection tube, the connection tube comprising a first portion with an outer diameter less than the nominal diameter of the housing for receiving the wafer previously supplied and a second portion with an outer diameter greater than the nominal diameter of the housing for receiving the wafer previously supplied ,
- forcibly fit the connection tube into the plate receiving housing of the pallet so that the wall of the plate receiving housing exerts an elastic holding force on the second portion of the connection tube,
- place the wire in the connection tube,
- locally deforming the connection tube so as to obtain a retention force for the connection wire in the connection tube.
De préférence, l'étape de déformation locale du tube de connexion réalise conjointement une déformation locale de la paroi du logement de réception de la plaquette de façon à obtenir un effort de rétention du tube de connexion dans le logement de réception.Preferably, the step of local deformation of the connection tube jointly produces a local deformation of the wall of the housing for receiving the plate so as to obtain a retention force of the connection tube in the receiving housing.
D'autres caractéristiques, détails et avantages apparaîtront à la lecture de la description détaillée ci-après, et à l'analyse des dessins annexés, sur lesquels :
- [
Fig. 1 ] est une représentation schématique d'un appareil électrique comportant un dispositif de coupure, - [
Fig. 2 ] est une vue de détail, en perspective, d'une plaquette du dispositif de coupure, - [
Fig. 3 ] est une vue partielle, en perspective, du dispositif de coupure, - [
Fig. 4 ] est une vue partielle, de dessus, d'un premier mode de réalisation du dispositif de coupure, - [
Fig. 5 ] est une vue partielle, de côté, du dispositif de coupure de lafigure 4 , - [
Fig. 6 ] est une représentation schématique d'étapes de fabrication d'un dispositif de coupure selon un deuxième mode de réalisation, - [
Fig. 7 ] est une vue partielle, de dessus, d'un dispositif de coupure selon le deuxième mode de réalisation, - [
Fig. 8 ] est une vue partielle, de côté, détaillant un aspect du dispositif de coupure, - [
Fig. 9 ] est une vue partielle, en perspective, d'une variante du premier mode de réalisation du dispositif de coupure, - [
Fig. 10 ] est une vue partielle schématique, de côté, d'une autre variante du premier mode de réalisation du dispositif de coupure, - [
Fig. 11 ] est une vue partielle schématique, de côté, illustrant un dispositif de coupure selon le deuxième mode de réalisation, - [
Fig.12 ] est une autre vue partielle schématique, de côté, illustrant le dispositif de coupure de lafigure 11 .
- [
Fig. 1 ] is a schematic representation of an electrical device comprising a switching device, - [
Fig. 2 ] is a detail view, in perspective, of a circuit breaker plate, - [
Fig. 3 ] is a partial view, in perspective, of the breaking device, - [
Fig. 4 ] is a partial top view of a first embodiment of the switching device, - [
Fig. 5 ] is a partial side view of the circuit breaker device.figure 4 , - [
Fig. 6 ] is a schematic representation of manufacturing steps of a switching device according to a second embodiment, - [
Fig. 7 ] is a partial top view of a cut-off device according to the second embodiment, - [
Fig. 8 ] is a partial view, from the side, detailing an aspect of the breaking device, - [
Fig. 9 ] is a partial view, in perspective, of a variant of the first embodiment of the switching device, - [
Fig. 10 ] is a schematic partial side view of another variant of the first embodiment of the switching device, - [
Fig. 11 ] is a schematic partial side view illustrating a cut-off device according to the second embodiment, - [
Fig.12 ] is another schematic partial view, from the side, illustrating the cut-off device of thefigure 11 .
Afin de faciliter la lecture des figures, les différents éléments ne sont pas nécessairement représentés à l'échelle. Sur ces figures, les éléments identiques portent les mêmes références. Certains éléments ou paramètres peuvent être indexés, c'est-à-dire désignés par exemple par premier élément ou deuxième élément, ou encore premier paramètre et second paramètre, etc. Cette indexation a pour but de différencier des éléments ou paramètres similaires, mais non identiques. Cette indexation n'implique pas une priorité d'un élément, ou paramètre par rapport à un autre et on peut interchanger les dénominations. Quand il est précisé qu'un dispositif comporte un élément donné, cela n'exclut pas la présence d'autres éléments dans ce dispositif.In order to facilitate reading of the figures, the various elements are not necessarily shown to scale. In these figures, identical elements bear the same references. Certain elements or parameters can be indexed, that is to say designated for example by first element or second element, or else first parameter and second parameter, etc. The purpose of this indexing is to differentiate between similar but not identical elements or parameters. This indexing does not imply a priority of an element, or parameter compared to another and one can interchange the denominations. When it is specified that a device comprises a given element, this does not exclude the presence of other elements in this device.
On a représenté sur la
- un interrupteur principal 20
d'un circuit principal 30, - un dispositif de coupure 50,
- une ampoule à vide 2 disposée en parallèle de l'interrupteur
principal 20.
- a
main switch 20 of amain circuit 30, - a cut-off
device 50, - a
vacuum interrupter 2 arranged in parallel with themain switch 20.
L'ampoule à vide 2 est prévue pour un équipement électrique à moyenne tension, c'est-à-dire une tension comprise entre 1 kV et 52 kV. L'appareil électrique 1 peut être par exemple un disjoncteur, un sectionneur ou un interrupteur. L'ampoule à vide 2 comporte une enveloppe formant une enceinte étanche sous vide. On entend par là que la pression régnant à l'intérieur de l'enceinte est inférieure à 10-4 millibar.The
L'électrode fixe 3 comporte une tige 23 et un corps de contact s'étendant transversalement à la tige. L'électrode mobile 4 comporte une tige 24 et un corps de contact s'étendant transversalement à la tige. L'électrode fixe 3 et l'électrode mobile 4 sont coaxiales. L'électrode mobile 4 est mobile en translation selon l'axe de la tige 24.The fixed electrode 3 comprises a
Le circuit principal 30 comprend un contact fixe 35. L'interrupteur 20 est mobile en rotation entre une position P1 correspond à une position nominale de circulation du courant électrique dans le circuit principal 30, illustrée en A sur la
La
La présente divulgation concerne un dispositif de coupure 50 d'un appareil électrique 1, comportant :
- Un interrupteur principal 20 configuré pour être déplacé entre une position de fermeture P1 permettant un passage de courant électrique dans un
circuit électrique principal 30 de l'appareil électrique 1 et une position d'ouverture P2 interdisant le passage de courant électrique dans lecircuit électrique principal 30, - Une ampoule à vide 2 comportant :
- -- Une électrode fixe 3,
- -- Une électrode mobile 4, configurée pour se déplacer entre :
- --- une première position P1', dans laquelle l'électrode fixe 3 et l'électrode mobile 4 sont en contact, et
- --- une deuxième position P2', dans laquelle l'électrode fixe 3 et l'électrode mobile 4 sont éloignées l'une de l'autre,
- -
Une palette 5 mécaniquement liée à l'électrode mobile 4, configurée pour faire passer l'électrode mobile 4 de la première position P1' à la deuxième position P2', lapalette 5comportant une plaquette 6 électriquement conductrice,
l'interrupteur principal 20 étant configuré pour entrainer lapalette 5 par l'intermédiaire de la plaquette 6 lors du passage de la position de fermeture P1 à la position d'ouverture P2,- -- un fil de connexion 7 reliant électriquement la plaquette 6 et l'électrode mobile 4, le fil de
connexion 7 étant en contact électrique avec un tube de connexion 8 disposé dans un logement de réception 9 de la plaquette 6,
- -- un fil de connexion 7 reliant électriquement la plaquette 6 et l'électrode mobile 4, le fil de
- dans lequel le logement de réception 9 comporte une paroi 10 exerçant un effort élastique de maintien sur le tube de
connexion 8.
- A
main switch 20 configured to be moved between a closed position P1 allowing passage of electric current in a mainelectric circuit 30 of the electrical apparatus 1 and an open position P2 prohibiting the passage of electric current in the mainelectric circuit 30, - A
vacuum interrupter 2 comprising:- -- A fixed electrode 3,
- -- A
mobile electrode 4, configured to move between:- --- a first position P1', in which the fixed electrode 3 and the
mobile electrode 4 are in contact, and - --- a second position P2', in which the fixed electrode 3 and the
movable electrode 4 are distant from each other,
- --- a first position P1', in which the fixed electrode 3 and the
- - A
pallet 5 mechanically linked to themobile electrode 4, configured to move themobile electrode 4 from the first position P1' to the second position P2', thepallet 5 comprising an electricallyconductive plate 6,
- the
main switch 20 being configured to drive thepallet 5 via theplate 6 when passing from the closed position P1 to the open position P2,- -- a
connection wire 7 electrically connecting thewafer 6 and themobile electrode 4, theconnection wire 7 being in electrical contact with aconnection tube 8 arranged in a receivinghousing 9 of thewafer 6,
- -- a
- in which the receiving
housing 9 comprises awall 10 exerting an elastic holding force on theconnection tube 8.
Lorsque l'électrode mobile 4 est dans la première position P1', l'électrode fixe 3 et l'électrode mobile 4 sont en contact l'une avec l'autre de façon à permettre un passage de courant électrique dans l'ampoule à vide 2. La première position P1' de l'électrode mobile 4 est dite position de fermeture de l'ampoule à vide 2. Lorsque l'électrode mobile 4 est dans la deuxième position P2', l'électrode fixe 3 et l'électrode mobile 4 sont éloignées l'une de l'autre de façon à empêcher un passage de courant électrique dans l'ampoule à vide 2. La deuxième position P2' de l'électrode mobile 4 est dite position d'ouverture de l'ampoule à vide 2. La deuxième position P2' correspond à la position d'ouverture maximale de l'ampoule à vide 2.When the
La palette 5 est entrainée par l'interrupteur 20 lors de la course de déplacement ouvrant le circuit principal 30. La palette 5 est recouverte d'une plaquette 6 électriquement conductrice. L'interrupteur 20 entre en contact avec la palette 5 par l'intermédiaire de la plaquette 6. L'interrupteur 20 comprend deux tiges parallèles 23, 24, le contact fixe 35 s'insérant entre ces deux tiges. Les deux tiges 23, 24 sont visibles sur la
Selon un aspect de la présente divulgation, la liaison électrique entre la plaquette 6 et le fil de connexion 7 fait intervenir une pièce intermédiaire qui est le tube de connexion 8. La plaquette 6 comporte un logement de réception 9. Le tube de connexion 8 est disposé dans le logement de réception 9 de la plaquette. La paroi 10 du logement de réception 9 et le tube de connexion 8 sont conformés de sorte que la paroi 10 exerce un effort élastique sur le tube de connexion 8. La paroi 10 du logement de réception 9 est élastiquement déformable. Ainsi, un contact robuste est assuré entre le tube de connexion 8 et la plaquette 6. La fiabilité à long terme du dispositif de coupure est améliorée.According to one aspect of the present disclosure, the electrical connection between the
Sur l'exemple ici décrit, une portion 11 du fil de connexion 7 est disposée à l'intérieur du tube de connexion 8.In the example described here, a
Un contact électrique entre le fil de connexion 7 et le tube de connexion 8 peut être assurée de différentes manières. Sur l'exemple représenté, le fil 7 est solidarisé au tube de connexion 8 par sertissage.An electrical contact between the
Le tube de connexion 8 est serti au fil de connexion 7 de façon à assurer un contact électrique entre le tube de connexion 8 et le fil de connexion 7. La portion sertie du fil de connexion 7 est dénudée. De préférence, toute la portion 11 de fil de connexion 7 comprise à l'intérieur du tube de connexion 8 est dénudée. Le fil de connexion 7 comporte une portion 12 disposée hors du tube de connexion 8, la portion 12 comprend une gaine isolante. Le fil de connexion 7 est un fil multibrins.The
La paroi 10 comporte une zone élastiquement déformée 13 exerçant un effort élastique de maintien sur le tube de connexion.The
Le tube de connexion 8 est cylindrique. Le tube de connexion 8 est, sur l'exemple représenté, de section circulaire. Selon un mode de réalisation non représenté, le tube de connexion 8 peut être de section carrée. Le tube de connexion 8 est ici en cuivre recuit. Le tube peut aussi être en aluminium. Ces matériaux assurent une bonne conductivité électrique ainsi qu'une bonne aptitude au sertissage.The
La
La plaquette 6 est en métal. La plaquette 6 est formée dans un feuillard métallique. La plaquette 6 peut être en acier, par exemple en acier inoxydable. L'épaisseur de la plaquette 6 est comprise entre 0,2 et 1 millimètre. La nature du matériau et les dimensions de la plaquette sont choisies de façon à présenter une bonne résistance à la répétition des chocs de l'interrupteur 20 contre la plaquette 6 lors de l'entrainement de la palette 5 par l'interrupteur.
Le logement de réception 9 s'étend selon un axe principal D. Le logement de réception 9 est cylindrique. L'axe principal D du logement de réception 9 est perpendiculaire au mouvement de l'interrupteur 20. En particulier, l'axe principal D du logement de réception 9 est perpendiculaire à l'axe de rotation autour duquel l'interrupteur 20 peut pivoter.The
La
Comme détaillé sur la partie A de la
Comme détaillé sur la
Selon un premier mode de réalisation, illustré sur la
Le diamètre extérieur de la première portion 21 du tube de connexion 8 est inférieur au diamètre nominal d_nom du logement de réception 9 lorsque la plaquette 6 est à l'état libre. Ainsi, il existe un jeu radial entre la première portion 21 du tube de connexion 8 et le logement de réception 9, de sorte que l'insertion du tube de connexion 8 dans le logement de réception 9 est aisée. L'insertion du tube de connexion 8 dans le logement de réception 9 est réalisée en translatant le tube 8 selon la direction de son axe principal, qui est aussi la direction de l'axe principal du logement. Au fur et à mesure de l'introduction du tube de connexion 8 dans le logement de réception 9, le jeu radial diminue jusqu'à devenir nul. Une fois le contact établi entre le tube 8 et la paroi 10, en poursuivant l'insertion du tube de connexion 8, la paroi 10 du logement de réception 9 est repoussée par le tube 8. Ainsi, une fois le tube disposé dans le logement de réception 9, la paroi 10 du logement 9 exerce un effort élastique de maintien sur le tube de connexion 8. Cet effort élastique de maintien garantit une pression de contact entre la plaquette 6 et le tube de connexion 8 qui garantit la qualité du contact électrique entre ces deux pièces. La réserve élastique garantit une pression de contact sensiblement constante dans le temps, ce qui garantit la fiabilité à long terme. L'effort élastique de maintien est schématisé par le signe F22 sur la
Le diamètre nominal d_nom du logement de réception 9 est le diamètre de la section correspondant à une position déterminée le long de l'axe du logement 9. Autrement dit, le diamètre nominal d_nom est susceptible d'évoluer le long de l'axe du logement de réception 9. Dans le cas où le logement de réception 9 est de forme cylindrique, le diamètre nominal d_nom est constant le long de l'axe principal D du logement de réception 9.The nominal diameter d_nom of the receiving
Le tube de connexion 8 comporte une première extrémité axiale 15 au niveau de laquelle le fil de connexion 7 sort du tube de connexion 8 et une deuxième extrémité axiale 16 opposée à la première extrémité axiale 15, et la première portion 21, dite portion amincie, comprend la deuxième extrémité axiale 16 du tube. Ce mode de réalisation est détaillé sur la
La première extrémité axiale 15 du tube 8 correspond à l'extrémité au niveau de laquelle le fil 7 sort du tube de connexion 8 afin de rejoindre l'électrode mobile 4. Selon les modes de réalisation illustrés, une extrémité du fil de connexion 7 est axialement comprise entre la première extrémité axiale 15 du tube de connexion 8 et la deuxième extrémité axiale 16 du tube de connexion 8. Autrement dit, une extrémité du fil de connexion 7 est contenue à l'intérieur du tube de connexion 8. Sur des variantes non illustrées, le fil de connexion 7 peut traverser le tube de connexion 8 d'une extrémité axiale 15 à l'autre extrémité axiale 16.The first
Selon le premier mode de réalisation, illustré sur la
Selon une variante de réalisation du dispositif de coupure, illustrée sur la
La
Dans ce mode de réalisation, la première portion 21 dite portion amincie est formée par écrasement du tube de connexion 8. Plus précisément, la première portion 21 dite portion amincie est formée par écrasement du tube de connexion 8 sur le fil de connexion 7. Autrement dit, la première portion 21 est formée par une partie écrasée du tube de connexion 8. Pour cela, et comme schématisé sur la
Ainsi, une unique opération d'écrasement du tube de connexion 8 permet d'assurer la liaison électrique entre le fil de connexion 7 et le tube de connexion 8, ainsi que la liaison électrique entre le tube de connexion 8 et la plaquette 6. De plus, un maintien mécanique du fil 7 dans le tube 8 est assuré.Thus, a single operation of crushing the
Les deuxième portions 22, 22' dite portions épaissies sont formées conjointement à la première portion 21 dite portion amincie, par écrasement du tube de connexion 8 sur le fil de connexion 7. La
En effet, la déformation de la paroi du tube 8 selon une direction radiale s'accompagne d'un refoulement de matière selon une direction axiale. La matière refoulée au cours de l'opération d'écrasement du tube 8 augmente localement le diamètre du tube de connexion 8 dans les zones adjacentes à la portion 21 amincie. La matière est refoulée de chaque côté de la zone amincie, selon deux sens opposés. Deux portions épaissies sont donc obtenues. La portion amincie 21 et les portions épaissies 22, 22' sont obtenues en une seule opération d'écrasement du tube de connexion 8. L'outil 31 de poinçonnage possède des flancs 32 inclinés de façon à faciliter le repoussement de la matière permettant de créer les portions épaissies 22, 22' du tube 8. L'extrémité de l'outil est par exemple de forme trapézoïdale, comme illustré sur la
Le diamètre du tube de connexion 8, avant déformation, est supérieur au diamètre du fil de connexion 7 de façon à permettre une introduction aisée du fil de connexion 7 dans le tube de connexion 8. La déformation de la paroi du tube de connexion 8 permet de progressivement annuler le jeu entre la paroi du tube 8 et le fil 7. En continuant la déformation jusqu'à l'écrasement du tube, une compression du fil 7 à l'intérieur de la paroi déformée du tube 10 est obtenue. Une liaison électrique entre le fil 7 et le tube 8 est ainsi obtenue, ainsi qu'un maintien mécanique du fil de connexion 7.The diameter of the
Les deuxième portions 22, 22', dite portions épaissies, possèdent un diamètre extérieur supérieur au diamètre nominal d_nom du logement de réception 9 lorsque la plaquette 6 est à l'état libre. Comme les portions épaissies 22, 22' possèdent un diamètre supérieur au diamètre nominal d_nom du logement de réception 9, un effort élastique de maintien est créé par la paroi 10 du logement de réception 9. Autrement dit, les deuxièmes portions 22, 22', dites portions épaissies, du tube de connexion 8 tendent à déformer la paroi 10 du logement de réception 9.The
Selon le mode de réalisation de la
La paroi 10 du logement de réception 9 comporte une ouverture 17 disposée en vis en vis du tube de connexion 8. L'ouverture 17 est en vis-à-vis de la première portion 21, dite portion amincie, du tube de connexion 8.The
L'ouverture 17 permet le passage de l'outil 31 permettant de déformer localement le tube de connexion 8. Autrement dit, l'ouverture 17 permet de déformer le tube de connexion 8 sans déformer la paroi 10 du logement de réception 9. L'effort appliqué par l'outil 31 est ainsi intégralement transmis au tube 8, ce qui limite l'effort total à appliquer à l'outil 31.The
Comme détaillé sur la
Autrement dit, le contact électrique entre le fil de connexion 7 et le tube de connexion 8 est assuré par sertissage, ce qui donne un contact fiable dans le temps. La zone plastiquement déformée 18 du tube de connexion 8 est en contact avec une portion électriquement conductrice du fil 7. Autrement dit, une partie dénudée du fil 7 est introduite dans le tube de connexion 8 et le tube de connexion 8 est déformé de façon à solidariser le fil 7 et le tube 8 par sertissage.In other words, the electrical contact between the
La zone plastiquement déformée 18 en contact avec le fil de connexion 7 est décalée axialement par rapport à la zone élastiquement déformée 13 de la paroi 10. Autrement dit, la zone plastiquement déformée 18 du tube de connexion est décalée le long de l'axe du tube par rapport à la zone 13 élastiquement déformée de la paroi 10 du logement de réception 9.The plastically
Sur l'exemple de la
La
- (a1) fournir une
palette 5comportant une plaquette 6 électriquement conductrice, la plaquette 6 comportant un logement de réception 9, le logement de réception 9 comportant une paroi 10 élastiquement déformable, - (b1) fournir un fil de
connexion 7, - (c1) fournir un tube de
connexion 8, - (d1) placer le tube de
connexion 8 dans le logement de réception 9 de la plaquette 6 de lapalette 5, - (e1)
placer le fil 7 dans le tube deconnexion 8, - (f1) déformer localement le tube de
connexion 8 de façon à créer uneportion amincie 21 et au moins uneportion épaissie 22,
- (a1) providing a
pallet 5 comprising an electricallyconductive plate 6, theplate 6 comprising a receivinghousing 9, the receivinghousing 9 comprising an elasticallydeformable wall 10, - (b1) provide a
lead wire 7, - (c1) provide a
connection tube 8, - (d1) place the
connection tube 8 in the receivingslot 9 of theplate 6 of thepallet 5, - (e1) place the
wire 7 in the connectingtube 8, - (f1) locally deforming the
connection tube 8 so as to create a thinnedportion 21 and at least one thickenedportion 22,
Sur la
La divulgation se rapporte aussi à un procédé de fabrication d'un dispositif de coupure 50 selon le premier mode de réalisation. Le procédé comporte les étapes :
- (a2) fournir une
palette 5comportant une plaquette 6 électriquement conductrice, la plaquette 6 comportant un logement de réception 9, le logement de réception 9 comportant une paroi 10 élastiquement déformable, - (b2) fournir un fil de
connexion 7, - (c2) fournir un tube de
connexion 8, le tube deconnexion 8 comportant une premièreportion 21 de diamètre extérieur inférieur au diamètre nominal d_nom du logement de réception 9 de la plaquette 6 préalablement fournie et une deuxièmeportion 22 de diamètre extérieur supérieur au diamètre nominal d_nom du logement de réception 9 de la plaquette 6 préalablement fournie, - (d2) emmancher de force le tube de
connexion 8 dans le logement de réception 9 de la plaquette 6 de lapalette 5 de façon à ce que la paroi 10 du logement de réception 9 de la plaquette 6 exerce un effort élastique de maintien sur la deuxièmeportion 22 dutube de connexion 8, - (e2)
placer le fil 7 dans le tube deconnexion 8, - (f2) déformer localement le tube de
connexion 8 de façon à obtenir un effort de rétention du fil deconnexion 7 dans le tube deconnexion 8.
- (a2) providing a
pallet 5 comprising an electricallyconductive plate 6, theplate 6 comprising a receivinghousing 9, the receivinghousing 9 comprising an elasticallydeformable wall 10, - (b2) provide a
lead wire 7, - (c2) provide a
connection tube 8, theconnection tube 8 comprising afirst portion 21 of outer diameter less than the nominal diameter d_nom of the receivinghousing 9 of thewafer 6 previously provided and asecond portion 22 of outer diameter greater than the diameter nominal d_nom of the receivinghousing 9 of theplate 6 previously supplied, - (d2) forcibly fitting the
connection tube 8 into the receivinghousing 9 of theplate 6 of thepallet 5 so that thewall 10 of the receivinghousing 9 of theplate 6 exerts an elastic holding force on thesecond portion 22 of theconnection tube 8, - (e2) place the
wire 7 in the connectingtube 8, - (f2) locally deform the
connection tube 8 so as to obtain a retention force for theconnection wire 7 in theconnection tube 8.
De préférence, l'étape f2 de déformation locale du tube de connexion 8 réalise conjointement une déformation locale de la paroi 10 du logement de réception 9 de la plaquette 6 de façon à obtenir un effort de rétention du tube de connexion 8 dans le logement de réception 9.Preferably, the step f2 of local deformation of the
La sous-étape d2 d'emmanchement de force du tube de connexion dans le logement de réception 9 peut aussi être réalisée après la sous-étape f2 de déformation du tube de connexion. Dans ce cas, l'étape e2 de placement du fil 7 dans le tube 8 est réalisée directement après la sous-étape c2 de fourniture du tube de connexion 8.The sub-step d2 of force-fitting the connection tube into the receiving
Claims (14)
- Switching device (50) of an electrical unit (1), comprising:- a main switch (20) configured to be displaced between a closed position (P1) allowing a passage of electrical current in a main electrical circuit (30) of the electrical unit (1) and an open position (P2) prohibiting the passage of electrical current in the main electrical circuit (30),- a vacuum interrupter (2) comprising:-- a fixed electrode (3),-- a mobile electrode (4), configured to be displaced between:--- a first position (P1'), in which the fixed electrode (3) and the mobile electrode (4) are in contact, and--- a second position (P2'), in which the fixed electrode (3) and the mobile electrode (4) are apart from one another,- a palette (5) mechanically linked to the mobile electrode (4), configured to make the mobile electrode (4) switch over from the first position (P1') to the second position (P2'),the palette (5) comprising an electrical conductive plate (6),the main switch (20) being configured to drive the palette (5) via the plate (6) in the switchover from the closed position (P1) to the open position (P2), characterized by-- a connection wire (7) electrically linking the plate (6) and the mobile electrode (4), the connection wire (7) being in electrical contact with a connection tube (8) disposed in an accommodating recess (9) of the plate (6),wherein the accommodating recess (9) comprises a wall (10) exerting an elastic holding force on the connection tube (8).
- Switching device according to Claim 1, wherein a portion (11) of the connection wire (7) is disposed inside the connection tube (8).
- Switching device according to Claim 1 or 2, wherein the connection tube (8) comprises a first portion (21), called thin portion, of outer diameter (d21) less than a nominal diameter (d_nom) of the accommodating recess (9), and a second portion (22), called thick portion, of outer diameter (d22) greater than the nominal diameter (d_nom) of the accommodating recess (9), the nominal diameter (d_nom) of the accommodating recess (9) being the diameter of the greatest circle inscribed in a cross-section (S) of the accommodating recess (9), and measured before insertion of the connection tube (8) into the accommodating recess (9).
- Switching device according to Claim 3, wherein the connection tube (8) comprises a first axial end (15) at which the connection wire (7) leaves the connection tube (8) and a second axial end (16) opposite the first axial end (15), and wherein the first portion (21), called thin portion, comprises the second axial end (16) of the tube.
- Switching device according to Claim 3, wherein the connection tube (8) comprises a first portion (21), called thin portion, and two second portions (22, 22'), called thick portions, the two second portions (22, 22') being adjacent to the first portion (21) and disposed axially on either side of the first portion (21), and wherein the wall (10) exerts an elastic holding force on the second portions (22, 22').
- Switching device according to Claim 5, wherein the first portion (21), called thin portion, is formed by crushing the connection tube (8).
- Switching device according to Claim 5 or 6, wherein the first portion (21), called thin portion, is formed by crushing the connection tube (8) on the connection wire (7).
- Switching device according to one of Claims 5 to 7, wherein the second portions (22, 22'), called thick portions, are formed jointly with the first portion (21), called thin portion, by crushing the connection tube (8) on the connection wire (7).
- Switching device according to one of the preceding claims, wherein the connection tube (8) comprises a plastically deformed zone (18), the plastically deformed zone (18) being in contact with the connection wire (7).
- Switching device according to one of the preceding claims, wherein the wall (10) of the accommodating recess (9) comprises a plastically deformed zone (19), the plastically deformed zone (19) being in contact with a plastically deformed zone (18) of the connection tube (9).
- Electrical unit (1) comprising:- a main switch (20) of a main circuit (30),- a switching device (50) according to one of the preceding claims,wherein the vacuum interrupter (2) is disposed in parallel with the main switch (20).
- Method for manufacturing a switching device (50) according to one of Claims 5 to 10, comprising the steps of:- (a1) supplying a palette (5) comprising an electrically conductive plate (6), the plate (6) comprising an accommodating recess (9), the accommodating recess (9) comprising an elastically deformable wall (10),- (b1) supplying a connection wire (7),- (c1) supplying a connection tube (8),- (d1) placing the connection tube (8) in the accommodating recess (9) of the plate (10) of the palette (5),- (e1) placing the wire (7) in the connection tube (8),- (f1) locally deforming the connection tube (8) so as to create a thin portion (21) and at least one thick portion (22),such that the wall (10) of the accommodating recess (9) of the plate (6) exerts an elastic holding force on the thick portion (22) of the connection tube (8).
- Method for manufacturing a switching device (50) according to one of Claims 1 to 4, comprising the steps of:- (a2) supplying a palette (5) comprising an electrically conductive plate (6), the plate (6) comprising an accommodating recess (9), the accommodating recess (9) comprising an elastically deformable wall (10),- (b2) supplying a connection wire (7),- (c2) supplying a connection tube (8), the connection tube (8) comprising a first portion (21) of outer diameter less than the nominal diameter (d_nom) of the accommodating recess (9) of the plate (6) previously supplied, and a second portion (22) of outer diameter greater than the nominal diameter (d_nom) of the accommodating recess (9) of the plate (6) previously supplied,- (d2) force-fitting the connection tube (8) in the accommodating recess (9) of the plate (6) of the palette (5) such that the wall (10) of the accommodating recess (9) of the plate (6) exerts an elastic holding force on the second portion (22) of the connection tube (8),- (e2) placing the wire (7) in the connection tube (8),- (f2) locally deforming the connection tube (8) so as to obtain a retaining force retaining the connection wire (7) in the connection tube (8).
- Manufacturing method according to the preceding claim, wherein the step (f2) of local deformation of the connection tube (8) jointly produces a local deformation of the wall (10) of the accommodating recess (9) of the plate (6) so as to obtain a retaining force retaining the connection tube (8) in the accommodating recess (9).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2105433A FR3123496A1 (en) | 2021-05-25 | 2021-05-25 | Switching device of an electrical device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP4095878A1 EP4095878A1 (en) | 2022-11-30 |
EP4095878B1 true EP4095878B1 (en) | 2023-07-19 |
Family
ID=77180136
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22165517.8A Active EP4095878B1 (en) | 2021-05-25 | 2022-03-30 | Breaking system of an electrical device |
Country Status (4)
Country | Link |
---|---|
US (1) | US11862418B2 (en) |
EP (1) | EP4095878B1 (en) |
CN (1) | CN115394601A (en) |
FR (1) | FR3123496A1 (en) |
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FR2655766B1 (en) * | 1989-12-11 | 1993-09-03 | Merlin Gerin | MEDIUM VOLTAGE HYBRID CIRCUIT BREAKER. |
ES2654037T3 (en) * | 2003-12-02 | 2018-02-12 | Schneider Electric Energy Manufacturing Italia S.R.L. | Switching device / circuit breaker for electrical substations |
US7186942B1 (en) * | 2006-02-23 | 2007-03-06 | Eaton Corporation | Three-position vacuum interrupter disconnect switch providing current interruption, disconnection and grounding |
FR2937786B1 (en) | 2008-10-29 | 2010-12-24 | Areva T & D Sa | CURRENT SWITCH ON AN ELECTRIC LINE COMPRISING A VACUUM BULB |
FR2946180B1 (en) | 2009-05-26 | 2012-12-14 | Areva T & D Sa | INTERNAL LATCHING AND INTERLOCKING DEVICE AT A SWITCH OR A CIRCUIT BREAKER. |
FR2970809B1 (en) * | 2011-01-25 | 2013-02-22 | Schneider Electric Ind Sas | MEDIUM VOLTAGE CUTTING DEVICE COMPRISING A VACUUM BULB |
CN104319166B (en) * | 2014-11-12 | 2016-05-18 | 沈阳华德海泰电器有限公司 | A kind of three station vacuum switches that adopt connection busbar to realize load-side external ground |
US9679724B2 (en) * | 2015-07-13 | 2017-06-13 | Eaton Corporation | Component for electric power system, and contact assembly and open air arcing elimination method therefor |
FR3044162B1 (en) * | 2015-11-20 | 2023-05-12 | Schneider Electric Ind Sas | ELECTRICAL PROTECTION DEVICE AND IN PARTICULAR MEDIUM VOLTAGE ELECTRIC CIRCUIT BREAKER |
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2021
- 2021-05-25 FR FR2105433A patent/FR3123496A1/en active Pending
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2022
- 2022-03-30 EP EP22165517.8A patent/EP4095878B1/en active Active
- 2022-05-12 US US17/742,457 patent/US11862418B2/en active Active
- 2022-05-13 CN CN202210522606.6A patent/CN115394601A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
CN115394601A (en) | 2022-11-25 |
US20220384129A1 (en) | 2022-12-01 |
FR3123496A1 (en) | 2022-12-02 |
US11862418B2 (en) | 2024-01-02 |
EP4095878A1 (en) | 2022-11-30 |
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