EP3991196A1 - Elektrische schalteinrichtung - Google Patents
Elektrische schalteinrichtungInfo
- Publication number
- EP3991196A1 EP3991196A1 EP20746894.3A EP20746894A EP3991196A1 EP 3991196 A1 EP3991196 A1 EP 3991196A1 EP 20746894 A EP20746894 A EP 20746894A EP 3991196 A1 EP3991196 A1 EP 3991196A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve body
- stop
- switching
- switching device
- control valve
- 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.)
- Pending
Links
- 239000012530 fluid Substances 0.000 claims abstract description 42
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 description 29
- 230000008569 process Effects 0.000 description 29
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- 238000007906 compression Methods 0.000 description 27
- 238000013461 design Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 239000004020 conductor Substances 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 230000004044 response Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
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- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 208000031872 Body Remains Diseases 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- IYRWEQXVUNLMAY-UHFFFAOYSA-N fluoroketone group Chemical group FC(=O)F IYRWEQXVUNLMAY-UHFFFAOYSA-N 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
-
- 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
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
-
- 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
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
- H01H2033/908—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism using valves for regulating communication between, e.g. arc space, hot volume, compression volume, surrounding volume
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/003—Earthing 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
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
- H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
Definitions
- the invention relates to an electrical switching device having a switching path and a flow device with a control valve for flowing through the switching path, the control valve having a movable valve body.
- An electrical switching device is known for example from the international publication WO 2019/024978 A1.
- a flow device is assigned to a switching section of the switching device.
- the operation of the flow device is controlled by means of a control valve.
- the control valve has a movable valve body which can be moved, supported or inhibited, by a spring.
- the response behavior is to be assessed as comparatively erratic.
- pulses can occur which affect the electrical switching device as a whole.
- the mode of operation of the control valve must be taken into account.
- the known construction has the disadvantage that fatigue phenomena occur with an increasing number of actuations of the control valve.
- the response behavior of the control valve can change due to signs of fatigue, which in turn can result in variable states, e.g. in the switching path of the electrical switching device.
- the object of the invention is to provide an electrical switching device which has a stable switching behavior even after a large number of switching operations.
- the object is achieved with an electrical switching device of the type mentioned at the outset in that the valve body is pressed into a sealing position by the flow pressure of a flowing fluid.
- An electrical switching device is used to cut or produce an electrically conductive current path in a phase conductor run.
- the electrical switching device has a switching path which preferably extends between switching contact pieces that can be moved relative to one another. Both when switching on, ie when the switching contact pieces approach and galvanic contacting the same, as well as when the switching device is switched off, ie when the switching contact pieces are galvanically separated and removed from each other, discharge phenomena can occur in the switching path. These discharge phenomena are referred to as flashovers during a switch-on process.
- switch-off arcs In the event of a switch-off process, these discharge phenomena are referred to as switch-off arcs, for example. Such discharge phenomena are associated with increased thermal loads that occur in the switching path. Due to the thermal loads, the switch contact pieces or other construction parts of the electrical switching device, for example, are exposed to increased wear. The switching path can be exposed to a fluid flow by means of a flow device.
- the flow device can, for example, inject a fluid into the switching path or guide a fluid out of the switching path, so that cooling is brought about in the switching path.
- the flow device can have, for example, a piston-cylinder arrangement, with a relative movement of the piston and cylinder being able to bring about an overpressure or underpressure to generate a corresponding flow.
- the operation of the flow device should be synchronized with a relative movement of switching contact pieces of the switching device.
- the switching path can be supplied with a current.
- Switching contact pieces that can be moved relative to one another and elements of the flow device (cylinder / piston) that can be moved relative to one another can be actuated synchronized with one another.
- a synchronous relative movement in the flow device can be brought about, for example, as a function of the progress of a relative movement of the switching contact pieces.
- both a current flowing through the switching path during a switch-on process and during a switch-off process can be advantageous. If necessary, for example, during a switch-off process, blowing the switching path can be provided and, for example, during a switching-on process, suction of a fluid from the switching path can be preferred. However, it can also be provided that the flow device should develop an effect only during a switch-on process or only during a switch-off process.
- a control valve can be provided which, for example, only allows the flow device to take effect during a switch-on or switch-off process.
- a relief opening of the inflow device can be opened or closed as required and the creation of an overpressure or a negative pressure in the inflow device can be prevented or brought about.
- a flowing fluid can pass through the relief opening, which is released or blocked in a controlled manner by the control valve.
- the flowing fluid creates a flow pressure.
- This flow pressure can be used to press the valve body into a sealing position, i.e. to block the relief opening.
- the valve body can preferably be mounted in a freely oscillating manner, for example in the manner of a clearance fit.
- the valve body can, for example, be movably (oscillating) between a first stop and a second stop. Free movement can take place free of external forces acting on the valve body.
- the relief opening can have a channel.
- the valve body can be inside the channel or at an mouth of the Relief opening be movably attached.
- a stop can prevent the valve body from exiting the channel. So with the valve body can be ordered shielded within the channel. Dielectric shielding is advantageous here, so that when a movable control valve is used, the dielectric properties of the switching device are retained.
- the valve body is advantageously moved into its sealing position by the flow pressure.
- the use of the flow pressure to actuate the valve body has the advantage that actuation of the valve body can be caused almost wear-free.
- the force acting on the valve body and thus the sealing seat of the same in the control valve or a detachment is increased.
- the valve body is, for example, movable with play, for example slidable or foldable, so that smooth actuation of the valve body can be brought about even at low flow pressures.
- the relief opening can initially be partially blocked.
- the control valve can have a soft characteristic, ie depending on the rate of change of the flow pressure, the valve body can cause a comparatively slow damming of the relief opening and thus a (slow) change in the pressure inside the flow device with a comparatively low rate of change.
- the control valve responds gently, thereby avoiding sudden changes in pressure.
- the electrical switching device is acted upon only to a small extent with additional forces when the valve body is engaged or disengaged.
- a soft Abfal len the locking action of the valve body can also be a Reversal of the flow direction and thus the reversal of the flow pressure on the valve body take place.
- actuating means such as springs can be dispensed with in order to actuate the valve body.
- This can lead to a freely movable valve body within the limits set (stops). Accordingly, an almost fatigue-free actuation of the valve body can be assumed.
- the control valve sits in a channel, for example, which can be formed, for example, by a relief opening on a cylinder or a piston of the flow device.
- a differential pressure between the interior or the exterior of the flow device a flow pressure of a fluid that flows around or flushes through the flow device can be produced.
- the flowing fluid should preferably be designed to be electrically insulating.
- This electrically insulating fluid can also be used to electrically isolate the switching path and also to flow through the switching path.
- fluorine-based fluids such as sulfur hexafluoride, fluoronitriles, fluoroketones or fluoroolefins can be used as electrically insulating fluids.
- nitrogen-based fluids such as, for example, mixtures with oxygen (for example purified air) can also be used as the fluid.
- the fluids are preferably in a gaseous form, but it can also be provided that the fluids are in liquid form.
- a further advantageous embodiment can provide that the valve body can be moved between a first stop and a second stop in the manner of a clearance fit.
- the valve body can be movably guided, for example, in the manner of a Spielpas solution.
- the valve body can be designed in the manner of a piston which can move freely in a channel.
- the valve body is limited in its free mobility by means of a first and a second stop.
- the valve body remains between a blocking position and an opening tion position and can be pressed from the first to the second stop or from the second to the first stop, depending on the flow pressure, which acts between the first stop and the second stop and vice versa.
- the design of the clearance fit can vary.
- a first stop it can be provided that the valve body is pressed into a sealing position on the first stop, whereas in a position on the second stop of the valve body the control valve is made permeable.
- a gap on the valve body can be released or closed.
- a channel in which the valve body is movable has a changing cross-section, whereby a sealing seat is present when the valve body rests against the first stop, and the control valve is open when it rests against the second stop .
- the first stop can, for example, have a shape-complementary receptacle for the valve body.
- Recesses e.g. teeth or incisions, can be provided on a second stop, which enables a fluid flow to pass between the second stop and the valve body.
- the valve body itself can have a through opening (overflow channel) which is dammed when it rests against the first stop and is permeable when it rests against the second stop.
- the valve body can, for example, be shaped like a disk / cylinder, but it can also be provided that further shapes are provided for the valve body.
- the valve body can also be shaped like a Ku gel or a cone.
- a sealing seat or a passage on the first or second stop can be formed by a correspondingly corresponding design of the stops or a (section of a) channel extending between the stops.
- a further advantageous embodiment can provide that the valve body has a through opening which can be blocked by one of the stops.
- a through opening (overflow channel) in the valve body makes it possible to use simplified structures for the attacks.
- a through-opening in the valve body can be blocked when it is in contact with the first stop (e.g. sealing position), whereas when the valve body is in contact with the second stop, the through-opening of the valve body is released. So with a low-wear design is given in order to achieve a constant response behavior after a large number of switching cycles of the control valve with the same flow pressures.
- the through opening can preferably extend essentially parallel to the cylinder axis or rotation axis.
- valve body is elastically deformable.
- the sealing seat or the sealing position of the valve body can be implemented in a simple form by means of an elastic valve body.
- an elastic valve body can be pressed into a sealing position. Even after a large number of switching cycles the valve body can be pressed into a sealing position again.
- the valve body can be subjected to a deformation in order to rest against or to remove a stop.
- An elastic valve body can be formed, for example, by using an elastomeric disk or an elastomeric plate. However, it can also be provided that, for example, a spherical or conical elastic valve body is used.
- valve body is locally fixed at least at certain points.
- a punctual local fixation for the valve body makes it possible, especially when using an elastic Ven til stresses to bring about or allow a deformation in a targeted manner.
- the control behavior of a smoothly moving valve body which can be moved between a first or a second stop depending on the flow pressure, can be influenced.
- a punk tual fixation also makes it possible to limit the degree of freedom of the valve body and thus to control the reproducibility of its movement within a flowing medium or caused by a flow pressure in a simplified manner.
- the valve body can, for example, be fixed centrally or in an edge region, whereby a preferred deformation is promoted, for example.
- an elastic Ventilkör by can be arranged in front of a relief opening and, for damming the relief opening, rest on a wall delimiting the relief opening, spanning the relief opening. In order to release the relief opening, the elastic Ventilkör can lift off the wall by deforming.
- Another advantageous embodiment can provide that a stop locally fixes the valve body.
- a stop is used to position the valve body, it can be deliberately removed from the stop, but only to the extent that local fixation, in particular at specific points, allows.
- the valve body can flip over or fold over by exposing it to the flow pressure in the manner of a barrier and being pressed against the first or second stop depending on the flow pressure. If you now use a stop to fix the valve body in place, it can easily be positioned between the first and second stop impact can be positioned and a fatigue-free actuation of the valve body can be made.
- a further advantageous embodiment can provide that a stop has a convex stop surface for the valve body.
- a stop can provide a convex stop surface for the valve body. Due to the convex design of the stop surface, pressure marks or notch marks are avoided when the valve body hits. This increases the durability of the valve body, and the sealing functions of the valve body are retained, since notches or pressure marks that form undesirable bypasses or other deformations are prevented.
- the convex stop surface can represent a portion of a ball cap, for example. However, it can also be provided that the convex stop surface is designed in the manner of a section of a cylinder jacket surface.
- a spherical cap-like convex stop surface can be used, whereby an all-round movement of the valve body can be allowed around the point fixation of the valve body.
- the mobility of the valve body of such a pronounced convex stop surface is limited uniformly and on all sides.
- an approximately cylinder-shaped configuration of the stop surface is appropriate, whereby a flap-like movement of the valve body can be forced.
- the deformation can be supported by the convex shape of the stop surface. A sharp-edged deformation of the valve body can be counteracted.
- control valve is positioned in a stationary manner relative to the switching path.
- the switching path can be limited by switching contact pieces that can be moved relative to one another. Regardless of the relative position of the switching contact pieces to one another, the control valve can remain stationary at rest.
- the control valve can remain at rest relative to this stationary switching contact piece. This reduces the mass to be moved of an electrical switching device with switching contact pieces which can be moved relative to one another.
- the control valve is protected from mechanical Vibratio NEN due to movements and the like. A reliable function of the control valve can thus be ensured. Even at low flow pressures, the valve body of the control valve can be operated, since superimposition of movements is avoided and accelerations occurring are kept away from the valve and valve body.
- a further advantageous embodiment can provide that the electrical switching device is an earthing switch, in particular a special high-speed earthing switch.
- An earthing switch has a switching path which is used to apply earth potential to a phase conductor.
- a switching contact piece usually has permanent earth potential, whereby the earth potential can be transferred to a phase conductor by bringing the switching contact pieces closer to each other and galvanically contacting them .
- Earthing switches are generally safety devices that are intended to reliably earth a phase conductor run.
- a switch-on process of an earthing switch is to be classified as the more significant switching action.
- rapid earthing switches ie earthing switches, the example, in the event of a fault, should contribute to a safety shutdown, ie to a forced earthing, the fastest possible movement of relatively movable switching contact pieces is to be brought about.
- the flow device should be designed in such a way that forces delaying the switch-on process are avoided during a switch-on process.
- An additional braking effect is to be avoided by the flow device.
- the control valve When switching on, the control valve should therefore be open and the orifice opening should be open.
- the control valve Conversely, during a disconnection process at an earthing switch, it is advantageous that the flow device develops its effect.
- the control valve should be pressed into the sealing position in the case of earthing switches or on their electrical switching devices in the switching-off process, whereas the sealing position of the Steuerven valve should be canceled during a switching-on process.
- a free orifice opening can be used during a switch-on process to fill the flow device with fluid, in particular unused, ie cooled and as far as possible charge carrier-free fluid, so that the flow device is clear to switch again for a switch-off process.
- fluid in particular unused, ie cooled and as far as possible charge carrier-free fluid, so that the flow device is clear to switch again for a switch-off process.
- a reverse effect of the control valve can be advantageous as required.
- Figure 1 is a side view of an electrical
- Figure 2 is a plan view of the electrical Kunststoffeinrich device known from Figure 1 in the off state, the
- Figure 3 is a plan view of the electrical switching device as shown in the figures 1 and 2 known when switched on, the
- Figure 4 is a perspective view of the electrical switching device known from Figures 1 to 3 in the switched off state and the
- Figure 5 shows a piston plate with a Steuerven valve in a first variant in a perspective view.
- FIGS. 6, 7 and 8 show sections through the piston plate known from FIGS. 1 to 5 with a control valve in the first embodiment
- Figure 12 shows a piston plate with a control valve in a second Aussper approximately variant in perspective view
- Figures 13, 14 and 15 each show a section through the piston plate together with the control valve in a second variant
- Figure 16 shows a piston plate with a control valve in a third embodiment variant in perspective view
- FIGS. 17 to 19 each show a section through the control valve known from FIG. 16 in the third embodiment variant.
- the structure of an electrical switching device and the mode of operation of a control valve will first be described with reference to FIGS. 1 to 4.
- FIGS. 1 to 4 In the figures 5 to 19 each Weil details of control valves are shown in three design variants.
- FIG. 1 shows a side view of an electrical switching device in section.
- the electrical GmbHeinrich device has an encapsulating housing 1.
- the encapsulating housing 1 surrounds active parts (live parts) of the electrical switching device, so that mechanical protection is given. Furthermore, the encapsulating housing 1 can hermetically house active parts of the electrical switching device, so that the interior of the encapsulating housing can be filled with an electrically insulating fluid. The encapsulating housing 1 prevents the electrically insulating fluid from volatilizing.
- the electrical switching device has a switching path 2.
- the switching path 2 extends between a first movable switching contact piece 3 and a second ortsfes th switching contact piece 4.
- the second switching contact piece 4 is supported on the encapsulating housing 1 in an electrically insulated manner.
- the encapsulating housing 1 has walls made of an electrically lei border material, which lead to ground potential.
- the second switching contact piece 4 also has ground potential, a grounding line of the second switching contact piece 4 being passed through the encapsulating housing 1 to the outside in an electrically insulated manner. This makes it possible, if necessary, to disconnect the second switching contact piece 4 from the earth potential. This is advantageous for checking and testing purposes, for example.
- the first switch contact piece 3 is gela on a cylinder 5.
- the cylinder 5 is part of a flow device and delimits a compression volume 6.
- the first GmbHkon contact piece 3 is designed as a hollow cylinder and has a blow channel 7 in its interior.
- the blow channel 7 opens at the free end of the first switch contact piece 3 in the Switching path 2.
- the other end of the blow channel 7 opens into the interior of the compression volume 6, so that the compression volume 6 can communicate with the environment, in particular in the area of the switching path 2, via the blowing duct 7.
- the cylinder 5 is movably mounted and made of electrically insulating Ma material.
- connection line is electrically insulated through the wall of the encapsulating housing 1 and can be connected there to a phase conductor to be earthed.
- a piston plate 9 is positioned so as to be stationary on a stem 10. The handle 10 is in turn supported in a stationary manner on the encapsulating housing 1.
- the piston plate 9 forms a stationary wall on the compression volume 6, so that a change in the compression volume 6 is effected when the piston plate 9 moves relative to the cylinder 5.
- the compression volume 6 increases.
- the switch contact piece 3 is removed from the second switch contact piece 4 (switch-off process)
- the compression volume 6 is reduced
- a relief opening opening into the compression volume 6 can be switched by a control valve 13.
- the relief opening is arranged in the stationary piston plate 9 before geous. At least one control valve 13 (position see FIG. 2) is arranged in the piston plate 9.
- a rotatably mounted lever arm 11 is provided.
- the lever arm 11 is with its free End guided in a groove on the cylinder 5, so that a pivoting movement can be converted into a linear movement of the cylinder 5 via a pin of the lever arm 11 engaging in the groove (see FIGS. 2, 3, 4).
- stop buffers 12 are arranged on the stem 10 carrying the piston plate 9.
- the switching device according to FIG. 1 is a multi-pole switching device. That is, several first switching contact pieces 3 and several second switching contact pieces 4 are arranged parallel to one another and are operated jointly.
- a switching device as shown in Figures 1 and 2 can be used for switching a multi-phase electrical power transmission system.
- the piston plate 9 is a substantially rectangular piston plate 9, in which two similarly constructed STEU erventile 13 are arranged.
- the control valves 13 are used to control the filling or emptying of the Kompressionsvo volume 6 with a fluid which is provided for flowing through the circuit 2.
- the compression volume 6 is filled with the largest possible amount of electrically insulating fluid.
- a switch-off process ie the first switching contacts Contact pieces 3 are separated from the second switching contact pieces 4 and moved away from them, a reduction of the compression volume 6 takes place.
- the stop buffers 12 each form stops for the moving th cylinder 5 to brake it in its end positions.
- the valve bodies 14a, 14b, 14c block the control valves 13, so that fluid located within the compression volume 6 has to flow away via the blow channels 7 of the first switching contact pieces 3 in the direction of the second switching contact pieces 4.
- the switching path 2 is flooded with uncontaminated, preferably cool, electrically insulating fluid, so that contaminated fluid is forced out of this area and the electrically insulating fluid flows around an arc that may be present.
- the position of the control valves 13 is shown symbolically in FIG. In FIGS. 5, 12 and 16, design variants of possible control valves 13 are shown. Since is shown in the associated Figures 6 to 11, 13 to 15, and 17 to 19, the mode of operation of the control valves 13, or their valve bodies 14a, 14b, 14c.
- control valves 13, 13a, 13b, 13c Regardless of the structural design of the control valves 13, 13a, 13b, 13c in terms of shape, number, etc., their function is chosen to be identical for the switching device shown in the figures (earthing switch / rapid earthing switch).
- the control valves 13, 13a, 13b, 13c are switched in such a way that a valve body 14a, 14b, 14c is moved out of its sealing position so that a fluid flow from the environment can flow over into the interior of the compression volume 6.
- the valve body 14a, 14b, 14c is pressed into its sealing position, so that fluid flows out of the compression volume 6, which decreases during a switch-off process, via the blow channels 7 of the first switching contact pieces 3.
- FIG. 5 shows a piston plate 9 with a stem 10 as known from FIGS. 1 to 4.
- a first variant embodiment of a control valve 13a is arranged in duplicate in the piston plate 9, an identical design being selected in each case. By doubling the control valves 13a, the permeability is increased.
- the control valve 13a in the first embodiment has an essentially cylindrical valve body 14a with a circular cross section.
- the valve body 14a of the control valve 13a in the first variant is freely movable between a first stop 15 and a second stop 16 (see FIGS. 6 to 11) in the direction of a displacement axis of the cylinder 5.
- the valve body 14a is displaceably Gela Gert in the manner of a clearance fit between the first and the second stop 15, 16.
- a plurality of curved elongated holes are distributed around the circumference and each form a through opening 17.
- the cross-section of the first stop 15 is selected such that it completely covers the through openings 17 and when the valve body 14a of the control valve 13a comes into contact in the first variant, these are blocked or dammed by the first stop 15 (see FIG 6).
- the second stop 16 is dimensioned in such a way that on the side facing away from the viewer of FIG. 5, it supports or engages the valve body 14a of the control valve 13a of the first variant in the edge area, so that when the valve body 14a engages at the second stop 16, the through openings 17 are not blocked (see FIG. 8).
- FIG. 6 shows the position of the valve body 14a during a switch-off process, that is, the valve body 14a is pressed into its sealing position on the first stop 15.
- a pressing force is brought about by the flow pressure of the flowing fluid, which is compressed inside the compression volume 6.
- the contact pressure on the seat of the valve body 14a in its sealing position also increases.
- a Reversal of the direction of flow pressure (Fig. 7). That is, the compression volume 6 increases, as a result of which the flow pressure of the flowing fluid moves the valve body 14a away from the first stop 15 and presses it in the direction of the second stop 16 (FIG. 8).
- the recesses 17 are now released and fluid can flow through the recesses 17 of the valve body 14a into the interior of the compression volume 6.
- FIGS. 9 to 11 An alternative embodiment of a first stop 15 is shown in FIGS. 9 to 11.
- the first stop 15 is formed by a shoulder in the channel of the piston plate 9 ge.
- Only the second stop 16 is represented by a plate attached to it, which can be dismantled in order to bring the valve body 14a into its play seat. Function and mode of operation, however, are identical to the embodiment variant as shown in FIGS. 6, 7 and 8.
- FIG. 12 shows a second variant of a control valve 13b. Again, there are two similar control valves 13b on the piston plate
- the use of an elastically deformable valve body 14b is now provided.
- the elastically deformable valve body 14b in turn has a cylindrical shape with a circular cross-section.
- the valve body is positioned flat on the side of the piston plate 9 facing the compression volume 6 by 14b of the second embodiment variant of a control valve 13b.
- a central screw connection is provided, with a relief opening with several channels in the piston in the overlap area of the valve body 14b of the second embodiment variant 13b. benplatte 9 is arranged, which is covered by the valve body 14b.
- the mode of operation of the control valve 13b in the second embodiment will now be described with reference to FIGS. 13 to 15.
- the flow pressure presses a valve body 14b of the second variant of the control valve 13b against the wall (first stop 15) of the piston plate 9 and dams the channels in the piston plate 9.
- a switch-off process the fluid located in the compression volume 6 is pressed through the blow channels 7 of the first switching contact pieces 3 in the direction of the switching path 2.
- the direction of the flowing fluid is reversed.
- the flow pressure presses the valve body 14b of the second embodiment variant out of the sealing seat due to the elastic deformability and lifts it off the piston plate 9 at its free circumference.
- the valve body 14b of the control valve 13b in the second variant is fixed at points by the second stop 16.
- FIG. 16 shows a piston plate 9 with a control valve 13c in a third variant.
- an elastically deformable valve body 14c is clamped on one side (at the edge), so that a flap-like opening of the valve body 14c of the control valve 13c is made possible in the third embodiment.
- a second stop 16 which has a convexly curved stop surface, is used for punk tual fastening of the valve body 14c. This makes it possible for the valve body 14c of the third control valve 13c to lift off from the first stop 15, which is formed by the surface of the piston plate 9, and to press against the second stop 16. Because of the convex curvature of the second stop 16, excessive deformation or mechanical loading, for example notching of the valve body 14c of the control valve 13c in FIG third variant prevents.
- Figures 17 shows a piston plate 9 with a control valve 13c in a third variant.
Landscapes
- Multiple-Way Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019212109.8A DE102019212109A1 (de) | 2019-08-13 | 2019-08-13 | Elektrische Schalteinrichtung |
PCT/EP2020/069762 WO2021028138A1 (de) | 2019-08-13 | 2020-07-13 | Elektrische schalteinrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3991196A1 true EP3991196A1 (de) | 2022-05-04 |
Family
ID=71842636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20746894.3A Pending EP3991196A1 (de) | 2019-08-13 | 2020-07-13 | Elektrische schalteinrichtung |
Country Status (5)
Country | Link |
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US (1) | US12027329B2 (de) |
EP (1) | EP3991196A1 (de) |
CN (1) | CN114270465B (de) |
DE (1) | DE102019212109A1 (de) |
WO (1) | WO2021028138A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4418295A1 (de) * | 2023-02-14 | 2024-08-21 | General Electric Technology GmbH | Schneller erdungsschalter mit coanda-effekt |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4211159A1 (de) * | 1992-03-31 | 1993-10-07 | Siemens Ag | Elektrischer Hochspannungs-Leistungsschalter |
DE10322876A1 (de) | 2003-05-21 | 2004-12-16 | Daimlerchrysler Ag | Sitzventil mit Dichtungselement |
DE502004001261D1 (de) * | 2004-02-27 | 2006-10-05 | Abb Technology Ag | Isoliertes Erderschaltgerät für gasisolierte Schaltanlagen |
FR2947377B1 (fr) * | 2009-06-29 | 2011-07-22 | Areva T & D Sa | Valve a clapet de decharge destinee a decharger un gaz dielectrique entre deux volumes d'une chambre de coupure de disjoncteur haute ou moyenne tension |
KR101309317B1 (ko) * | 2009-09-10 | 2013-09-30 | 엘에스산전 주식회사 | 가스 차단기용 밸브 및 그를 이용한 가스 차단기 |
KR20140023318A (ko) | 2011-03-17 | 2014-02-26 | 에이비비 테크놀로지 아게 | 가스 절연식 고전압 차단기 |
JP6439521B2 (ja) * | 2015-03-16 | 2018-12-19 | 富士電機株式会社 | パッファ形ガス遮断器 |
DE102016219812A1 (de) * | 2016-10-12 | 2018-04-12 | Siemens Aktiengesellschaft | Schaltanordnung |
EP3419039B1 (de) * | 2017-06-20 | 2020-08-26 | General Electric Technology GmbH | Elektrischer hochspannungsschutzschalter |
CN110914947B (zh) | 2017-07-31 | 2021-12-28 | 通用电器技术有限公司 | 设置有吹弧单元的电气开关 |
-
2019
- 2019-08-13 DE DE102019212109.8A patent/DE102019212109A1/de active Pending
-
2020
- 2020-07-13 WO PCT/EP2020/069762 patent/WO2021028138A1/de unknown
- 2020-07-13 US US17/635,079 patent/US12027329B2/en active Active
- 2020-07-13 CN CN202080057002.8A patent/CN114270465B/zh active Active
- 2020-07-13 EP EP20746894.3A patent/EP3991196A1/de active Pending
Also Published As
Publication number | Publication date |
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CN114270465A (zh) | 2022-04-01 |
WO2021028138A1 (de) | 2021-02-18 |
US12027329B2 (en) | 2024-07-02 |
CN114270465B (zh) | 2024-04-05 |
DE102019212109A1 (de) | 2021-02-18 |
US20220293370A1 (en) | 2022-09-15 |
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