EP2283501A1 - Control for a high-voltage/medium-voltage electrical device having a short actuation time - Google Patents
Control for a high-voltage/medium-voltage electrical device having a short actuation timeInfo
- Publication number
- EP2283501A1 EP2283501A1 EP09753952A EP09753952A EP2283501A1 EP 2283501 A1 EP2283501 A1 EP 2283501A1 EP 09753952 A EP09753952 A EP 09753952A EP 09753952 A EP09753952 A EP 09753952A EP 2283501 A1 EP2283501 A1 EP 2283501A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- belt
- axis
- control according
- connection
- cables
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/36—Driving mechanisms, i.e. for transmitting driving force to the contacts using belt, chain, or cord
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
- H01H3/3005—Charging means
- H01H3/3026—Charging means in which the closing spring charges the opening spring or vice versa
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
- H01H3/3052—Linear spring motors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/40—Driving mechanisms, i.e. for transmitting driving force to the contacts using friction, toothed, or screw-and-nut gearing
Definitions
- the present invention relates to controls and mechanical transmission devices for high and medium voltage electrical equipment, particularly for high and medium voltage switches.
- the present invention relates in particular to the controls comprising springs for performing opening and closing cycles on the switches.
- Controls for high and medium voltage electrical equipment of known type include a spring to open a switch of the equipment, called opening spring and a spring to close this switch, called closing spring.
- the closing spring is loaded and is maintained in this state, when a closing command is given, the load is released causing the closing of the switch via a mechanical link.
- the control is arranged such that, releasing the load of the closing spring causes the loading of the opening spring which is maintained in a loaded state until an opening command is received.
- one of the requirements of this type of control is to provide mechanical opening and closing in reduced times, less than one second, for example of the order of 90 ms for closing and 20 ms at 30 ms for opening.
- the transmission elements are kept under mechanical tension until an opening or closing order is issued.
- the transmission elements must withstand such a mechanical tension over a prolonged period.
- the transmission elements are also highly stressed for a very short time, in particular at their fastenings to the spring and the corresponding shaft. Indeed, during the opening command, the entire load of the spring is released instantly, the traction forces resulting from this expansion on the transmission element both at its attachment to the opening spring and at the level of its attachment to the opening shaft are considerable.
- the tensile force can reach tens of kilo Newton, typically 30 kN.
- the transmission elements and their connection to the springs and shafts are therefore designed to withstand such stresses.
- these controls may be subjected to inclement weather, and the interior of the controls must be designed to withstand temperatures between -50 0 C and +50 0 C and may experience condensation occasionally.
- these controls in particular the elements for transmitting the closing and opening forces, are chosen so as to ensure safe operation for a very long duration and this under severe conditions, both in terms of the constraints applied and level of external conditions.
- a metal roller chain or a cable is used as transmission elements, for example in the control described in document FR 2 778 492.
- the chains and cables offer the required safety over a long period of time.
- a control for high and medium voltage equipment comprising between the actuator opening and the opening shaft a transmission element formed by a flexible belt, and between the closing actuator and the shaft. closing a transmission means formed by a flexible belt.
- the flexible belt according to the present invention comprises a plurality of flexible longitudinal elements intended to connect the two zones between which the force is to be transmitted, and at least one transverse element extending between the longitudinal elements.
- This belt can be formed either by a textile fiber webbing or by a plurality of parallel cables embedded at least for part of their length in a flexible matrix.
- the cables form the longitudinal elements and the matrix forms the transverse element.
- the warp yarns form the longitudinal elements and the weft yarns form the transverse elements.
- the mass of the transmission element is reduced, so the actuation time can be reduced.
- it is no longer necessary to provide a lubrication of the transmission element maintenance is facilitated.
- the cost price is reduced compared to that of a chain.
- a multi-cable belt has the following advantages: - it is flexible, therefore small diameter return pulleys can be used.
- the radius of curvature can be optimized by determining the number of cables arranged in parallel and the diameter of the cables. Congestion is reduced,
- the present invention therefore mainly relates to an order for high and medium voltage switchgear comprising at least one actuator for opening / closing a switch of said switchgear, a mechanism able to move a moving part of said switch and a force transmission element, said transmission element being formed by a flexible belt .
- Said flexible belt is, for example arranged between the actuator and said mechanism.
- the belt may comprise connection nozzles to the actuator and the mechanism at these two ends, each connection end having an end for attaching an end of the belt and an end for attachment to a rod. extending in the direction of movement of the belt or an axis orthogonal to this displacement.
- the belt comprises a plurality of cables arranged parallel to each other and embedded at least for part of their length in a flexible matrix.
- the matrix can then extend continuously over a large part of the length of the cables.
- the matrix is made of thermoplastic material, for example polyethylene.
- the cables are advantageously held tight in at least one of the connection end pieces by stamping.
- connection ends comprises bores whose axes are oriented in the direction of movement of the belt, each bore receiving a free end of a cable and wherein each cable is held by stamping.
- At least one of the connection ends may comprise a transverse bore orthogonal to the axes of the bores and parallel to the plane containing the axes of the bores, said transverse bore penetrating radially into the bores of the cables and a pin being introduced into this transverse diameter bore.
- connection ends has a face inclined relative to the plane containing the axes of the bores so that the cable holding force obtained by stamping is greater on the closed ends of the ends.
- the bore that the side of the open ends of the bores, the face being inclined for example at an angle of 1.5 ° relative to the plane containing the axes of the bores.
- the belt is made of woven or braided textile fibers.
- These textile fibers are for example polyethylene, polyester or aramid.
- connection ends may comprise a first and a second axis parallel to each other, and orthogonal to the the direction of movement of the belt, the two axes being connected to an element of the connecting end for connection to the mechanism or to the actuator, each end of the belt being wound around the axes of the connecting end, the second axis being disposed between said connecting tip member and the first axis, the end portion of the belt being folded, the end of the belt being secured to the belt so as to form a closed loop, the loop having an inner face and an outer face, the loop surrounding the first axis so that its inner surface is in contact with the first axis and surrounding the second axis so that its outer surface is in contact with the second axis, the portion loop surrounding the second axis being formed of a superposition of two belt thicknesses, the end of the loop formed by the free end of the belt coming out of the embouchure t connection along the first axis.
- the control can also comprise connection means between the belt and the spring ensuring a transmission of forces between the belt and the spring along the axis of the spring.
- connection means between the belt and the spring may comprise a frustoconical piece mounted in the spring, resting on an end turn of the spring by a base, said piece frustoconical connection being connected to the connection end by a threaded rod screwed into the connecting end, said threaded rod being secured to the frustoconical piece by a first nut.
- the control may advantageously comprise a locknut formed by a tube and a second nut, the tube being clamped between the first and the second nut.
- the length of the tube is advantageously at least equal to five times the diameter of the threaded rod.
- the control according to the invention may also comprise connection means between the belt and the lever providing a pivotal connection about an axis parallel to that of the shaft.
- the lever may comprise an axis projecting parallel to the axis of the shaft and the connection end has a bore orthogonal to the direction of movement of the belt, said bore receiving the axis, the connecting endpiece being rotatable around the axis.
- the connection tip may advantageously comprise two parts articulated with respect to each other by means of a connecting rod, the hinge pins being orthogonal to the surface of the belt.
- the actuator is for example an actuator opening the switch, the lever being an opening lever and the shaft being a main shaft and comprises a second actuator forming a closing actuator of the switch.
- the closing actuator may comprise a spring connected to a closing lever by a belt, the closing lever being fixed on a closing shaft parallel to the main shaft on which is fixed the opening lever, the closing lever being rotationally integral with a cam adapted to act on the opening lever , to cause the closing of the switch.
- the drive may also include a gear for driving the lever in rotation, the gear meshing with a gear train driven by an electric motor to energize the spring.
- the present invention also relates to a high and medium voltage electrical equipment comprising a control according to the present invention.
- the subject of the present invention is also a method of assembling a belt and a connecting end, the belt comprising several cables arranged parallel to each other and embedded at least over part of their length in a matrix. flexible, the free ends of the cables not being embedded in the matrix, and the connecting end having as many bores as cables, said method comprising the steps of: introducing an end of each cable into a bore,
- the method according to the invention may comprise a step of pre-assembly of the cables in the bores before their final assembly.
- the method according to the present invention may also include a step of applying sealing means at the connection between the belt and the connecting tips, for example by applying a paste of polyurethane type.
- FIG. 1 is a perspective view of an exemplary control of a high or medium voltage electrical apparatus according to the present invention
- FIG. 2 is a perspective view of a detail of embodiment of the control of FIG. 1,
- FIG. 3 is a perspective view of the actuating assembly of the closing switch alone
- FIG 4 is a perspective view of an embodiment of the connection between the closing spring and the belt
- FIG. 5 is a detailed view of FIG. 3 at the connection between an element of an actuator and the belt
- FIG. 6 is a cross-sectional view of an exemplary embodiment of a belt according to the present invention
- FIGS. 7A to 7C are sectional views of exemplary embodiment of return pulleys used in the control according to the present invention
- FIGS. 8A to 8C are perspective, top and side views of an example of connection tip particularly suitable for fixing a belt of FIG. 6,
- FIGS. 9A to 9C are views in longitudinal section and in perspective, respectively, of an example of connection tip particularly adapted to the attachment of a strap made by weaving of textile fibers,
- FIG. 9D and 9E are views in perspective and side respectively of an alternative embodiment of the tip of Figures 9A to 9C.
- control according to the present invention comprises springs as opening and closing actuators. It is understood that a control using different actuators and different mechanical connections is not beyond the scope of the present invention.
- the particular example of control according to the present invention comprises an opening mechanism MO of a switch, for example a circuit breaker (not shown) and a closing mechanism MF of the switch, arranged one next to the other in a case 2. These two mechanisms MO and MF are connected mechanically to a main shaft 7, itself connected to a moving part of the switch.
- the opening mechanism MO comprises an elastic means 6 intended to store mechanical energy by deformation and to release it following an opening command, a transmission element 8 of the forces applied by the elastic means 6 and a lever 10 integral with rotation of the main shaft 7.
- This elastic means 6 is formed in the example shown by a helical spring biased in tension.
- the transmission element 8 is connected by one end (not visible) to one end of the spring 6 and by another end 8.2 to the lever 10, so that a force exerted on the lever by the spring via the transmission element causes rotation of the main shaft in a given first direction of rotation as soon as the first locking system (not visible) releases the lever 10, causing the opening of the switch.
- the closing mechanism MF comprises an elastic means 12 intended to store mechanical energy by deformation and to release it following a closing command, opening locking means 11, a transmission element 14 of the forces applied by the means elastic 12, a cam 18 integral in rotation with a shaft 19, called a closing shaft, parallel to the main shaft, said cam 18 cooperating with the lever 10.
- This elastic means 12 is formed, in the example represented by a coil spring biased in tension.
- the transmission element 14 is connected by one end 14.1 to one end of the spring 12 and by another end 14.2 to a disc 20 also integral in rotation with the closing shaft, so that a force exerted by the spring on the disc 20 causes the rotation of the cam as soon as the closing locking means 11 release the disc 20. This causes, by cooperation with the lever 10, the rotation of the main shaft 7 in a second direction of rotation opposite the first meaning, causing the switch to close.
- the disc 20 has a toothed contour intended to cooperate with a gear train 21 driven by an electric motor (not shown) and making it possible to load the closing spring 12.
- the transmission elements 8, 14 are formed by a strap or flexible belt, having a substantially flat shape, i.e. a section whose thickness is reduced relative to its width.
- a flexible belt in the present invention comprises a plurality of flexible longitudinal elements intended to connect the two zones between which the force is to be transmitted, and at least one flexible transverse element extending between the longitudinal elements.
- These belts may be formed, in one exemplary embodiment, by weaving or braiding textile fibers, for example polyethylene or aramid fibers, for example Kevlar®.
- the woven belt is obtained, in a known manner, by crossing of two threads so that this crisscrossing is at right angles.
- the warp threads are arranged in the direction of the longitudinal direction and the weft threads are arranged in the transverse direction.
- these belts may be formed by a plurality of metal cables, for example steel, arranged parallel and embedded at least for part of their length in a flexible material, thermoplastic type, for example polyurethane.
- the cables form longitudinal elements and the matrix forms the transverse element.
- An example of such a belt is shown in Figure 6, on which we can see the cables 22 arranged parallel to each other and the matrix 24 of flexible material.
- the matrix 24 makes it possible to secure the cables together, to facilitate the handling of this belt and to reduce the pressure of surface pressure on the cables.
- the die 24 covers the entire length of the cables to protect them from corrosion.
- return pulleys are provided to guide the belts.
- the matrix 24 is provided only around the areas of the cables that are not intended to come to slide on the pulleys, this lack of matrix further increases the flexibility of the belt in its curvature zones.
- the shape of Deflection pulleys can be adapted to this variant embodiment.
- connection means 26 ensures alignment between the axis of the spring and the portion of the belt attached thereto so as to ensure transmission of the force between the spring and the belt along the axis of the spring.
- the connection means comprises a frustoconical piece 28 disposed inside the spring, provided at a first longitudinal end with a base 30 bearing on a turn 32 forming the end of the spring.
- this base 30 is stepped and has a cylindrical portion 33 of smaller diameter to allow the mounting of a second spring of reduced diameter arranged coaxially in the first spring
- the frustoconical piece has at a second longitudinal end a passage 35.
- the connection means 26 also comprises a rod 34 intended to connect the first end 14.1 of the belt 14 to the frustoconical piece 28, the rod 34 passing through the passage 35.
- the rod 34 is threaded and is screwed by an end 34.1 in a connecting piece 36 provided with a tapped bore 38 secured to the first end 14.1 of the belt 14.
- a first nut 40 is screwed onto the threaded rod 34 inside the frustoconical piece 28 and comes in abutment against the bottom of the truncated cone.
- a washer 42 is provided between the bottom of the truncated cone and the first nut 40.
- a counter nut 44 is provided to prevent the unwanted unscrewing of the nut 40.
- the counter-nut comprises a tube 46 and a second nut 48, surrounding the rod 34 and mounted in compression between the first 40 and the second nut 48.
- the tube 46 has a length equal to at least 5 times the diameter of the screw 34. This length prevents the loosening of this assembly.
- the minimum length of the rod 34 is chosen so that, on the one hand, the spring can be assembled and energized (mechanically) from its rest position, and on the other hand, the mounting of the tube 46 and against the nut 48 after the adjustment of the pretension of the spring is ensured.
- the connecting piece 36 has an orifice 49 opening into the bore 38 to allow the passage of a tool intended to locally deform the rod and thus prevent simple way the unscrewing of the rod 34. Any other means preventing the separation of the rod 34 and the connection tip is conceivable.
- the second end 14.2 of the belt 14 is fixed on a pivoting part, in the particular example of the closing mechanism MF on the disk 20.
- the connection between the belt 14 and the disk is therefore provided so that the belt accommodates this rotation without being solicited.
- the end 14.2 comprises a connecting end 50 provided with a bore 52 orthogonal to the direction of movement of the belt and parallel to the axis of rotation of the disc 20, and intended to receive a lug 54 fixed on the disc and parallel to its axis.
- the connecting piece 50 is mounted freely to pivot about the lug 54 forming an axis of rotation.
- the connecting end 50 and the lug 54 are held on the disc by means of a bolt 56, as can be seen in FIG. 2.
- connection piece 50 ' In another exemplary embodiment shown in FIG. 5, a degree of freedom is added in connection piece 50 ', this latter piece is no longer made in one piece but has a first portion 58 fixed to the strap, a second part 60 intended to be mounted in rotation on the lug 54, and a rod 62 connecting the first 58 and the second 60 portion, the axis 63 of rotation of the rod on the second portion 60 being orthogonal to the axis of the bore 52 for receiving the lug 54.
- This additional degree of freedom provides additional flexibility for balancing the load across the full width of the belt, particularly in the case of a belt made up of several parallel cables, to distribute the load in a balanced manner over all cables. This therefore makes it possible to increase the load applicable to the belt.
- the connecting tips 36, 50 are advantageously made of steel so as to withstand the shocks applied to them. We will now describe an example of fastening the core of the belt with the connection tips.
- the cables of the belt are tightened in the connection ends 36, 50 so as to secure the belt with the connecting end piece.
- connection tip 36 has at its end opposite to that provided with the bore 38, a plurality of blind holes 64, each receiving one end of a cable and in which they are held tight.
- the axes of the bores 64 are contained in a plane also containing the axis of the bore 38.
- the bores 64 are parallel and each bore forms a housing for one end of a cable.
- the bores are arranged relative to each other correspondingly to the relative spacing of the cables in the belt.
- the inlet of the bores is chamfered to facilitate insertion of the cables into the bores.
- the ends of the cables are retained in the bores by deformation thereof by stamping, which causes a pinching of the cables.
- the diameter of the bores 64 is provided slightly higher than that of the cables.
- this deformation is discrete and is performed along the bores. Provision is made to exert a force on a face 69 of the connector end parallel to the plane containing the axes of the bores and along the axes of the bores, and not over the entire surface of the connection tip.
- the material of the connecting piece which is for example steel, deforms around the ends of the cables and at least partially fills the voids between the son constituting the cables and the inner surface of the bore.
- the deformation tool DF in FIG. 8A, does not comprise a flat surface but a surface provided with projections 65 parallel to each other and extending each parallel to an axis of a bore 64.
- it is provided to make a greater nip at the bottom 64a of the bores than at the open end 64b of the bores, which has the effect of improving the fixing.
- this is obtained for example by producing the face 69 on which the inclined deformation force will be applied with respect to the plane of application of the deformation force, for example of a angle ⁇ of 1.5 °, or by tilting the tool making the deformation.
- connection tip The footprint made in the connection tip is, for example of the order of 0.5 times the diameter of the cables.
- a pin 72 having the diameter of the transverse bore 70 is introduced into the bore and slightly deforms the cables, which allows for a pre-assembly of the cables and the connection tip.
- the pin 72 enters the bores 64 of about 0.3 mm.
- the pin 72 improves the tensile strength of the connection between the cables 22 and the connection tip 36.
- the glue is preferentially applied in a partial manner, for example in the bottom 64a of the bores 64.
- the resistance at the pinch zone is at least equal to the resistance of the belt itself.
- the end of the belt is wrapped around two axes of the connection tip.
- the connecting end 36 ' comprises a stirrup 74 comprising two parallel flanges 76 connected by a bottom 78 provided with a bore 38' into which is screwed a threaded rod 34 intended for attachment to an element of the control.
- the connection tip 36 ' has a first 80 and a second 82 parallel axes formed by pins fixed by each end in a flange 76, the second axis 82 being disposed between the bottom 78 and the axis 80.
- the end portion of the belt is folded in two, the free end of the belt is fixed to the belt, for example by gluing or by means of seams, so as to form a closed loop 90.
- This loop receives the first axis, the two belt strips are then superimposed and wrap around the second axis, then out of the connection end along the first axis.
- the loop is formed either after the winding of the belt around the axes, or before, it is then the first axis which is removable and put in place in the loop.
- the flanges 76 have holes for mounting the longitudinal ends of the pins, the pins having a shoulder 88 at a first end and with tapped bore 89 at a second end to allow the establishment of a bolt 91, ensuring the transverse retention of the pins.
- the bolt has a hexagonal head.
- a connection tip 36 '' which is an alternative embodiment of the connection tip 36 '.
- This connecting end 36 '' differs from the connecting end 36 ', essentially by the means for fastening the belt.
- the connecting end 36 '' comprises a first plate 100 intended to fix the belt on the connecting end and a second plate 102 substantially orthogonal to the first plate 100 intended to allow the connection of the tip 36 '' to an element of the control.
- the second plate 102 has a bore (not visible) in which is screwed a threaded rod 34 integral with a control element.
- the first plate 100 is oriented relative to the second plate 102 so as to contain the axis of the threaded rod 34.
- the tip is made in one piece by stamping a sheet
- a stamped portion 104 connects the first 100 and the second plate
- the stamped portion 104 has a bias portion for shift the second plate 102 relative to the first plate and disposed the axis of the threaded rod 34 in the plane of the first plate 104 as one can be seen in Figure 9E on which the connecting end 36 '' is shown partially sidewise in longitudinal section.
- the first plate 100 comprises means for fastening the belt to the end piece by winding the belt in a manner similar to the attachment on the end piece 36 '.
- the first plate 100 comprises three slots 108, 110, 112 oblong, each having an axis orthogonal to the axis of the belt, these three slots being separated by bars 114, 116 forming winding axes of the belt 14.
- the lights are for example cut by means of a punch.
- the winding is identical to that of FIG. 9A, the bar 114 having the function of the axis 80 and the bar 116 having the function of the axis 82. However, it is advantageously provided that the belt, after its winding around the bars 114 and 116, again enters the light 108 and runs along a lower face of the first plate 100.
- connection tip 36 '' is very simple to implement, since it only requires a drawing and stamping step.
- FIG. 2 there can be seen a reinforcement lever 66 fixed to the disk 20 and on which is attached the second end 14.2 of the belt 14 via the connecting tip 50. This lever allows a transfer of effort by reducing the flexion of the disc 20. As mentioned above, the belts are guided by return pulleys 68 ensuring the change of direction of the belts.
- the minimum radius of a pulley is calculated according to the diameter of the belt that it guides.
- the diameter of a cable being reduced compared to the use of a single large cable pulleys of smaller diameter can be used.
- the size of the order can be reduced.
- FIGS. 7A to 7C exemplary embodiments of these pulleys can be seen.
- the pulleys are mounted on bearings 92.
- the surface 94 of the pulleys in contact with the belt may be of different types. It may be smooth, formed by a circular section cylinder and bordered by two lateral guides 96 ( Figure 7A).
- the surface 94 '' has annular grooves 98 coaxial with the axis of the pulley, each intended to receive a portion of cable provided at the bare parts of the belt.
- the connection of the belt 8 to the lever 10 is effected identically to the connection of the belt 14 to the disc 20, ie by means of a connecting piece 77 rotatably mounted about an axis parallel to the main axis. In the particular example, this axis is mounted between two flanges 81 of the lever 10.
- connection of the belt 8 to the spring 6 is similar to that of the belt 14 to the spring 12, i.e. by means of a frustoconical piece and a threaded rod. It is understood that a belt provided with two end pieces, each of different structure at its two ends is not beyond the scope of the present invention.
- the motor rotates the toothed disk 20 via the gear train 21, the pin 54 is consequently rotated about the closing shaft 19.
- the second end 14.2 of the belt 14 is driven so that the first end 14.1 of the belt moves, compressing the spring 12.
- a first locking device 11 is provided to block the rotation of the disc 20 when the energy level stored in the spring 12 is sufficient, which corresponds to a rotation of the disc a few degrees after the top dead center has been exceeded.
- the first device of 11 lock releases the disc 20, which, under the force exerted by the spring 12 via the belt 14, is rotated, driving the closing shaft 19, and the cam 18.
- the cam 18 then comes into contact with the lever 10, which pivots, driving the main shaft 7 in rotation in a second direction of rotation, which causes the displacement of the movable member of the switch and the closing of the switch.
- a second locking device locks the lever 10 when the closed position of the contact is reached.
- the movement of the lever 10 causes a traction of the belt 8, which has the effect of compressing the opening spring 6.
- the motor is activated to reload the closing spring 12 as previously described.
- the second locking device releases the lever 10, which, under the force exerted by the spring 6 via the belt 8, is rotated, driving the main shaft 7 in the first direction of rotation causing the opening of the switch.
- control according to the present invention offers the advantage of operating without requiring lubrication, the associated maintenance is therefore removed and the risk of wear caused by poor lubrication is also removed.
- the transmission elements are not susceptible to corrosion.
- the transmission elements offer a reduced mass compared to the chains generally used, the amount of energy required for the operations of opening and closing is reduced.
- the moving masses being reduced, the open-close time can be reduced from about 3 ms to 4 ms.
- the belts have a smaller footprint compared to the chains, which reduces the size of the order.
- these belt elements have a much lower cost compared to those generally used, which reduces the cost of the order, this being all the more remarkable that the described control example implements two elements of force transmission.
- the description has been made by taking as an example the use of a flexible belt for the transmission of effort between an actuator and the levers of a control mechanism.
- the belts as described above can be used anywhere in the chain of transmission of forces between an actuator, for example a spring and the movable contact of a switchgear to high or medium tension, in which tensioning forces are applied to the belts.
- the belts described can be used to transmit forces between a control mechanism and a circuit breaker with an opening spring disposed at the circuit breaker.
Landscapes
- Transmission Devices (AREA)
- Mechanisms For Operating Contacts (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Power-Operated Mechanisms For Wings (AREA)
- Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
- Clamps And Clips (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11173109.7A EP2375429B1 (en) | 2008-05-30 | 2009-05-29 | Control for high- and medium-voltage electrical appliance with reduced actuating time |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0853584A FR2931997A1 (en) | 2008-05-30 | 2008-05-30 | CONTROL FOR HIGH AND MEDIUM VOLTAGE ELECTRICAL APPARATUS WITH REDUCED ACTUATION TIME. |
PCT/EP2009/056598 WO2009144297A1 (en) | 2008-05-30 | 2009-05-29 | Control for a high-voltage/medium-voltage electrical device having a short actuation time |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11173109.7A Division EP2375429B1 (en) | 2008-05-30 | 2009-05-29 | Control for high- and medium-voltage electrical appliance with reduced actuating time |
EP11173109.7 Division-Into | 2011-07-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2283501A1 true EP2283501A1 (en) | 2011-02-16 |
EP2283501B1 EP2283501B1 (en) | 2012-03-14 |
Family
ID=40158573
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09753952A Not-in-force EP2283501B1 (en) | 2008-05-30 | 2009-05-29 | Control for a high-voltage/medium-voltage electrical device having a short actuation time |
EP11173109.7A Not-in-force EP2375429B1 (en) | 2008-05-30 | 2009-05-29 | Control for high- and medium-voltage electrical appliance with reduced actuating time |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11173109.7A Not-in-force EP2375429B1 (en) | 2008-05-30 | 2009-05-29 | Control for high- and medium-voltage electrical appliance with reduced actuating time |
Country Status (6)
Country | Link |
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EP (2) | EP2283501B1 (en) |
KR (1) | KR101651918B1 (en) |
CN (1) | CN102047363B (en) |
AT (1) | ATE549730T1 (en) |
FR (1) | FR2931997A1 (en) |
WO (1) | WO2009144297A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012090037A1 (en) * | 2010-12-31 | 2012-07-05 | Abb Technology Ltd | Circuit breaker |
FR2990051B1 (en) | 2012-04-25 | 2014-05-30 | Alstom Technology Ltd | SPRING TYPE CONTROL (S) OF A HIGH VOLTAGE OR MEDIUM VOLTAGE SWITCH PROVIDED WITH A RATTER WHEEL COUPLING DEVICE |
CN103065827B (en) * | 2012-12-28 | 2015-07-01 | 常熟开关制造有限公司(原常熟开关厂) | Operating mechanism with automatic switch transfer |
CN103021692B (en) * | 2012-12-28 | 2015-10-28 | 常熟开关制造有限公司(原常熟开关厂) | A kind of switching mechanism of switchgear operating mechanism |
CN103903905B (en) * | 2014-04-11 | 2016-07-06 | 辽宁易德实业集团有限公司 | Opening and closing induction current vacuum switch device |
DE102017218863A1 (en) * | 2017-10-23 | 2019-04-25 | Siemens Aktiengesellschaft | Drive device for an electric switch and use of the drive device for switching |
CN108058757B (en) * | 2017-11-27 | 2019-07-09 | 华中科技大学 | A kind of bionical driving unit of biped robot's kneecap impedance |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3432696A1 (en) * | 1984-09-03 | 1986-03-13 | Siemens AG, 1000 Berlin und 8000 München | DRIVING DEVICE FOR A CIRCUIT BREAKER WITH Eccentric and Directional Lock |
FR2597564B2 (en) * | 1986-04-21 | 1989-08-18 | Hutchinson | IMPROVED POWER TRANSMISSION BELT |
DE222637T1 (en) * | 1985-10-29 | 1987-11-05 | Hutchinson S.A., Paris | DRIVE BELT. |
FR2778492B1 (en) * | 1998-05-11 | 2000-06-23 | Alsthom Gec | SPRING CONTROL FOR CIRCUIT SWITCH |
FR2812760B1 (en) * | 2000-08-04 | 2002-09-13 | Schneider Electric High Voltag | DRIVE CHAIN MECHANISM FOR HIGH VOLTAGE CUT-OUT ELECTRICAL EQUIPMENT |
-
2008
- 2008-05-30 FR FR0853584A patent/FR2931997A1/en not_active Withdrawn
-
2009
- 2009-05-29 EP EP09753952A patent/EP2283501B1/en not_active Not-in-force
- 2009-05-29 WO PCT/EP2009/056598 patent/WO2009144297A1/en active Application Filing
- 2009-05-29 KR KR1020107029193A patent/KR101651918B1/en active IP Right Grant
- 2009-05-29 EP EP11173109.7A patent/EP2375429B1/en not_active Not-in-force
- 2009-05-29 CN CN200980119848.3A patent/CN102047363B/en not_active Expired - Fee Related
- 2009-05-29 AT AT09753952T patent/ATE549730T1/en active
Non-Patent Citations (1)
Title |
---|
See references of WO2009144297A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR20110028296A (en) | 2011-03-17 |
FR2931997A1 (en) | 2009-12-04 |
ATE549730T1 (en) | 2012-03-15 |
EP2283501B1 (en) | 2012-03-14 |
KR101651918B1 (en) | 2016-08-29 |
CN102047363A (en) | 2011-05-04 |
CN102047363B (en) | 2014-12-03 |
EP2375429A1 (en) | 2011-10-12 |
EP2375429B1 (en) | 2014-02-12 |
WO2009144297A1 (en) | 2009-12-03 |
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