EP4097749A1 - Switch for an on-load tap changer and load transfer switch for an on-load tap changer - Google Patents
Switch for an on-load tap changer and load transfer switch for an on-load tap changerInfo
- Publication number
- EP4097749A1 EP4097749A1 EP21702642.6A EP21702642A EP4097749A1 EP 4097749 A1 EP4097749 A1 EP 4097749A1 EP 21702642 A EP21702642 A EP 21702642A EP 4097749 A1 EP4097749 A1 EP 4097749A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- switch
- arcing
- movable
- current path
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0016—Contact arrangements for tap changers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
- H01H1/2066—Fork-shaped bridge; Two transversally connected contact arms bridging two fixed contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0016—Contact arrangements for tap changers
- H01H2009/0022—Mounting of the fixed contacts or taps on cylindrical wall of oil vessel containing the tap changer; Details of screening
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0027—Operating mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/40—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
Definitions
- the invention relates to a switch for an on-load tap-changer of a step transformer and a diverter switch for an on-load tap-changer of a step transformer.
- German patent application DE 10 2014 107 273 A1 discloses a switch for egg NEN diverter switch of an on-load tap-changer with a discharge contact, a primary fixed contact and several primary moving contacts which are arranged in a stack in a Maisträ ger.
- the switch comprises two structurally identical primary consumable contacts.
- Known on-load tap-changers usually consist of a selector to select the respective winding tap of the transformer to be switched to, and a load switch for the actual load switching from the current winding tap to the new, selected winding tap. Switching is carried out by operating different switches. This regularly creates arcs on the switching contacts, which melt away or burn off small amounts of the contact material and thus lead to contact erosion. The burn-up depends on the current strength and the duration of the arc at the respective contact. With increasing load, i.e. higher currents and voltages, the demands on the switches and contacts are consequently increased.
- a switch is therefore provided for or in an on-load tap changer of a step transformer.
- the switch comprises a discharge contact, a primary fixed contact and at least one contact unit.
- the contact unit has at least one movable contact, a first consumable contact and a second consumable contact which, when the switch is switched over, can be pivoted together about a pivot axis in such a way that they each have a first Position in which they contact the diverting contact and the primary fixed contact, and a second position in which they are separated from the diverting contact and the primary fixed contact, can assume.
- the second arcing contact takes the first position before the first arcing contact and when switching from the first position to the second position, the second arcing contact leaves the first position after the first arcing contact.
- the first arcing contact assumes the first position in front of the at least one movable contact and when switching from the first position to the second position, the first arcing contact leaves the first position the at least one movable contact.
- This multi-stage commutation has the advantage that the duration of an arc on the first and second arcing contact or the movable contact is shortened, and thus the contact erosion on the first and second arcing contact or the movable contact is also reduced.
- the movable contact, the first consumable contact and the second consumable contact consist of different conductive materials which have different conductivity.
- the movable contact is preferably made of copper, the first arcing contact of brass and the second arcing contact of stainless steel.
- the choice of material can influence the contact erosion due to the properties of the material. In particular, it is important that the contacts are even burn off, so that the staggering of the contacting and lifting times and the sequence of contacting and lifting of the movable contact, the first arcing contact and the second arcing contact are retained. Otherwise it can lead to malfunctions and malfunctions on the switch and consequently on the entire on-load tap-changer.
- the movable contact and / or the first arcing contact and / or the second arcing contact have a different geometric shape.
- the cross section of the respective contact through which the current flows can be reduced.
- the at least one movable contact, the first arcing contact and the second arcing contact each have two contact areas with which they rest in the first position on the discharge contact and the fixed contact to be assigned.
- At least one of the two contact areas can consist of a material that differs from the material of the rest of the contact, for example an arc-resistant copper-tungsten sintered material.
- the first arcing contact and the second arcing contact are arranged in the second position relative to the movable contact in such a way that at least one contact area of the first arcing contact and / or the second arcing contact protrudes from the contact areas of the moving contact.
- the second arcing contact is arranged in the second position relative to the first arcing contact in such a way that at least one contact area of the second arcing contact protrudes from the contact areas of the first arcing contact.
- a contact area that protrudes in relation to the other system areas means that the corresponding contact is on the earlier when switching to the first position Leaving contact and / or the primary fixed contact occurs than the contacts that have no or a less protruding contact area and, in return, leave the deriving contact and / or the primary fixed contact later when switching from the first position to the second position. This can influence the duration of an arc on a contact and the contact erosion.
- the switch comprises a contact carrier which is pivotably mounted about the pivot axis and has a first support plate and a second support plate which is arranged parallel to the first support plate. Furthermore, the contact carrier comprises at least one further movable contact, the movable contacts, the first consumable contact and the second consumable contact being arranged between the support plates.
- the movable contacts are preferably identical in shape and material to one another.
- the movable contacts and the first consumable contact and the second consumable contact are arranged in a stack in the contact carrier.
- the movable contacts, the first arcing contact and the second arcing contact each have two parallel elongated holes lying one above the other. They are movably attached between the support plates by means of guide pins that go through the elongated holes.
- the movable contacts, the first consumable contact and the second consumable contact can be arranged at a distance from one another in a stack by means of disks that lie between the individual contacts and are pushed onto the guide bolts.
- the guide bolts together with the elongated holes form a mechanical stop for the movable contacts as well as the first and second erosion contact compared to that on these contacts by compression springs that are arranged on the back surfaces of the contacts away from the contact areas during the switching process of the switch are, exerted force.
- the elongated holes of the movable contacts, the first consumable contact and the second consumable contact are each designed differently in length, such that the movable contacts, the first consumable contact and the second consumable contact the mechanical stop during the switching process of the switch or . Reach the contact unit from the second to the first position and / or from the first to the second position at different times. It can be provided that the elongated holes of the first arcing contact are made shorter than the elongated holes of the second arcing contact, and longer than the elongated holes of the movable contacts.
- the movable contacts and the first and second fire contact are each with the ends of the elongated holes pointing away from the contact areas on the guide bolts. This can have the effect that the second consumable contact protrudes further beyond the guide pins than the first and this in turn protrudes further than the movable contacts.
- the movable contacts, the first from fire contact and the second arcing contact when the switch or the contact unit is switched from the second to the first position the discharge contact and the primary fixed contact one after the other and leave the discharge contact and the primary fixed contact when switching from the first position to the second position again one after the other.
- the movable contacts, the first burn contact and the second burn contact are arranged on the contact carrier that they are resiliently biased against the diverting contact and the primary fixed contact in the first position.
- the movable contacts, the first erosion contact and the second erosion contact are arranged in a stack-like manner in such a way that the movable contacts are arranged between the first erosion contact and the second erosion contact.
- any possible arrangement of the contacts in a stack is possible.
- the switch comprises a secondary fixed contact and a second contact unit, which is arranged symmetrically to the first contact unit with respect to an axis of symmetry which runs through the pivot axis.
- the second contact unit is constructed analogously to the first contact unit and accordingly has a third consumable contact, which is formed identically to the first consumable contact, and a fourth consumable contact, which is formed identically to the second consumable contact.
- the fourth consumable contact is on the same level as the first consumable contact and the third consumable contact is on the same level as the second consumable contact.
- the switch is designed as a permanent main switch or as a disconnector for or in a diverter switch of an on-load tap-changer. det.
- the aforementioned object is achieved by a diverter switch for or in an on-load tap changer of a step transformer.
- the diverter switch has a switch formed according to the first aspect of the invention with at least one contact unit.
- the diverter switch has a first current path that includes the movable contacts of the contact unit of the switch, a second current path that includes the first arcing contact of the switch, a third current path that includes the second arcing contact of the switch, a fourth current path that includes at least one vacuum interrupter and a fifth current path that connects the switch to a lead.
- the first current path has a certain resistance, which results from the specific resistance of the material from which the movable contacts are made.
- the second current path has a resistance that is greater than the resistance of the first current path and the third current path has a resistance that is greater than the resistance of the second current path.
- the resistances of the second and third current path can be determined by the material of the respective arcing contact or the specific resistance of the material from which the respective arcing contact, which is part of the path, is made and / or by the geometric shape of this arcing contact .
- the resistance of the fourth current path results from the material of the contacts or the specific resistance of the material of the contacts of the at least one vacuum interrupter which the fourth current path comprises.
- the resistance of the fifth current path results from the material of the line or the specific resistance of the material from which the line is made, which connects the switch to the discharge line.
- the diverter switch has a switch with a second contact unit, wherein the diverter switch has at least three further current paths, which the movable contacts of the second contact unit and a NEN third arcing contact and a fourth arcing contact of the second contact unit and which are formed analogously to the first, second and third current path.
- the diverter switch has a switch with a second contact unit, the diverter switch having five further current paths which are designed analogously to the first, second, third, fourth and fifth current paths.
- Figure 1 is a perspective view of an advantageous embodiment of a switch for an on-load tap changer
- FIG. 2 shows a plan view of an advantageous embodiment of a diverter switch for an on-load tap changer which comprises the switch of FIG. 1;
- FIG. 3 is a partial sectional view of the switch from FIG. 1;
- FIG. 4 shows a schematic representation of an advantageous embodiment of a diverter switch
- Figure 5 is a plan view of a further advantageous embodiment of the diverter switch.
- FIG. 1 shows a perspective view of an advantageous embodiment of a switch 10 for an on-load tap changer 40.
- the switch 10 comprises a discharge contact 13, a primary Fixed contact 14 and a secondary fixed contact 15. Furthermore, the switch 10 has a first contact unit 12, which is in a first position in which it contacts the Ableitkon 13 and the primary fixed contact 14, and a second contact unit 37, which is in a second position in which it is separated from the diverter contact 13 and the secondary fixed contact 15 on.
- the contact units 12, 37 are arranged in a contact carrier 20 and are mounted so that they can pivot about a pivot axis 21 relative to the diverting contact 13 and the fixed contacts 14, 15 such that they can each assume the first position and the second position.
- the first contact unit 12 comprises a contact stack with a first consumable contact 17, a second consumable contact 18 and a plurality of movable contacts 16 arranged between the consumable contacts 17 and 18.
- the second contact unit 37 also includes a contact stack with a third consumable contact 38, a fourth consumable contact 39 and several, between the consumable contacts 38 and 39 lying movable contacts 16.
- the discharge contact 13, the fixed contacts 14, 15 and the movable contacts 16, which are constructed identically zuei nander, are made of copper.
- the first and third arcing contacts 17, 38 are constructed identically to one another and are made of brass.
- the second and fourth arcing contacts 18, 39 are also designed to be identical to one another and are made of stainless steel.
- the contact carrier 20 has a first support plate 201 and a second support plate 202, between which the contact stacks of the two contact units 12 and 37 are arranged.
- the support plates 201, 202 are structurally identical, arranged in parallel and in alignment one above the other and are made of metal.
- the consumable contacts 17, 18, 38, 39 each have ganlar 23 with which they rest against the discharge contact 13 and one of the fixed contacts 14 and 15 in the first position.
- the second contact unit 37 which is in the second position, it can be seen that the contact areas 23 on the outside relative to the pivot axis 21 are at a greater distance from the fixed contacts 14 or 15 than the contact areas 23 on the inside are from the discharge contact 13.
- FIG. 2 shows a plan view of an advantageous embodiment of a diverter switch 30 for an on-load tap-changer 40 which includes the switch 10 from FIG.
- the contact unit 37 is in the first position and the contact unit 12 is in the second position.
- the support plate 201 is hidden in FIG. 2, so that the internal structure of the contact carrier 20 can be seen.
- the two contact units 12 and 37 are arranged symmetrically to one another in the contact carrier 20 with respect to an axis of symmetry 22.
- the on-load tap-changer 40 comprises the diverter switch 30, a switching shaft 41 for driving the switch 10 and a contact cylinder 44 through which the switching shaft 41 extends coaxially.
- the diverter contact 13 and the fixed contacts 14, 15 are passed through the contact cylinder 44 and attached to it.
- the contact carrier 20 comprises a lever 50 with arms 501, 502, 503 arranged in a Y-shape and a fork 51 and a central portion of the central arm 503 are attached thereto.
- the fork 51 is attached to the lever 50 between the two lateral arms 501, 502 on the side facing away from the central arm 503 and has an elongated hole which extends as an extension of the central arm 503 and at its outer end remote from the lever 50 is open.
- the contact stacks 16/17/18 and 16/38/39 are each with two guide pins 32, which go through parallel slots 31 in the contact stacks 16/17/18, 16/38/39 and are made of metal, on the support plates 201 , 202 movably attached.
- the free end of the central arm 503 is mounted pivotably about the pivot axis 21.
- the support plates 201, 202 and consequently also the contact carrier 20, the fork 51 and the contact stack 16/17/18, 16/38/39 relative to the diverter contact 13 and the fixed contacts 14, 15 about the pivot axis 21 are pivoted.
- the contact stacks 16/17/18, 16/38/39 and the Kunststoffträ ger 20 thus form a one-sided lever with respect to the pivot axis 21.
- the contact stacks 16/17/18, 16/38/39 are arranged symmetrically to the lever 50 on both sides of the middle arm 503 and are supported with their back surfaces facing away from the plant areas 23 via compression springs (FIG. 3) on the side arms men 501, 502.
- the contact stacks 16/17/18, 16/38/39 are attached to the contact carrier 20 in such a way that they are each resiliently biased against the diverting contact 13 and the associated fixed contact 14, 15 in their first position.
- the guide pins 32 together with the elongated holes 31 form a mechanical stop for the movable contacts 16 and the first, second, third and the first, second, third and during the Umschaltvor transition of the switch 10, ie during the pivoting movement of the contact stack 16/17/18, 16/38/39 fourth arcing contact 17, 18, 38, 39 compared to the force exerted on this by the compression springs (FIG. 3).
- the elongated holes 31 of the movable contacts 16, those of the first and third arcing contact 17, 38 and those of the second and fourth arcing contact 18, 39 are each formed differently in length.
- the elongated holes of the second and fourth consumable contacts 18, 39 are longest.
- the elongated holes of the first and third arcing contact 17, 38 are shorter than the elongated holes of the second and fourth arcing contact 18, 39 and longer than the elongated holes of the movable contacts 16 are formed.
- the diverter switch 30 further comprises a base plate 45 of a frame (not shown in detail), a triangular driver 42 and a driver roller 43.
- the switching shaft 41 and the lever 50 are rotatably mounted on the base plate 45.
- the driver 42 sits rotationally test on the shift shaft 41 and carries the driver roller 43 in one corner.
- the driver roller 43 sits displaceably in the elongated hole of the fork 51, so that a rotation of the shift shaft 41 via the driver 42, the driver roller 43 and the fork 51 the lever 50 pivots in opposite directions about the pivot axis 21 and this pivoting movement is transmitted via the several bolts, the support plates 201, 202 and the four guide bolts 32 to the con tact stack 16/17/18, 16/38/39.
- the diverter switch 30 is in a stationary position in which the slave roller 43 is seated at the outer end of the elongated hole in the fork 51.
- the driver roller 43 presses the stack of contacts 16/38/39 via the two guide pins 32 assigned to it against the discharge contact 13 and the fixed contact 15.
- the mechanical stop, formed by the elongated holes 31 and the guide pins 32, for the movable contacts 16 and the consumable contacts 38 and 39 on the side facing the diverting contact 13 and the fixed contact 15 is reached.
- the contact stack 16/17/18 which is separated from the diverter contact 13 and the fixed contact 14, is pressed against the two guide bolts 32 assigned to it by the compression springs assigned to it (FIG. 3).
- the movable contacts 16 are connected to one another and to the consumable contacts 17, 18 in an electrically conductive manner.
- the contact stack 16/38/39 is separated from the diverter contact 13 and the fixed contact 15.
- the contact stacks 16/17/18, 16/38/39 are arranged symmetrically to the lever 50 on both Be th of the middle arm 503 in such a way that the fourth arcing contact 39 is on a level with the first arcing contact 17 and the third arcing contact 38 one Level with the second arcing contact 18 is located.
- the second and fourth Abbrandkon contacts 18, 39 have several recesses 52 in the contact carrier made of stainless steel, similar to a honeycomb structure, which increases the resistance of the Abbrandcontacts or reduces the electrical conductivity.
- FIG. 3 shows a sectional partial view of the switch 10 from FIGS. 1 and 2, in particular the contact stack 16/17/18 of the contact unit 12 in the area which is on the outside relative to the pivot axis 21.
- the figure shows the contact stack 16/17/18 in the second position on the left and in the first position on the right.
- the compression springs 46 are arranged between the rear surfaces of the first consumable contact 17, the second consumable contact 18 and the movable contacts 16 and the side arm 501.
- the guide bolt 32 rests on the side facing away from the fixed contact 14 against the elongated holes 31 of the contacts and on the right side the guide bolt 32 rests against the elongated holes 31 of the contacts on the side facing the fixed contact 14.
- the elongated hole 31 of the second consumable contact 18 is the longest and the elongated hole 31 of the first consumable contact 17 is shorter than that of the first consumable contact 18, but is longer than the elongated hole of the movable contacts 16.
- the compression springs 46 press the contact stack 16/17/18 against the guide pin 32. Due to the different length of the elongated holes 31, the contact area 23 of the second arcing contact is opposite the contact areas 23 of the first Consumption contact 17 and the movable contacts 16 before. The contact area 23 of the first arcing contact 17 is in front of the contact areas 23 of the movable contacts 16.
- the contact stack 16/38/39 (not shown in FIG. 3) is constructed analogously except for the first and second arcing contact 38 and 39, which are interchanged with respect to the contact stack 16/17/18.
- FIG. 4 shows a schematic representation of an advantageous embodiment of a diverter switch 30.
- the diverter switch 30 has a switch 10 with at least one contact unit 12, which can be designed according to FIGS. 1 to 3, and five current paths, the number of current paths in the diverter switch 30 is not limited to five.
- a first current path 61 which includes the movable contacts 16 of the contact unit 12 and has a first resistor R1 and a first impedance L1
- a second current path 62 which includes the first consumable contact 17 of the contact unit 12 and a second resistor R2 and a second impedance L2
- a third current path 63 which comprises the second arcing contact 18 of the contact unit 12 and a third resistor R3 and a third impedance L3
- a fourth current path 64 which comprises a vacuum interrupter 19 and has a fourth resistor R4 and a fourth impedance L4
- a fifth current path 65 which connects the switch 10 to a discharge line 60 and has a fifth resistor R5 and a fifth impedance L5.
- FIG. 5 shows a plan view of a further advantageous embodiment of the diverter switch 30. This embodiment is similar to the embodiments that have been described with reference to FIGS. 1 and 2, so that the differences in particular are explained in more detail below.
- the diverter switch 30 has three sectors, each with a switch 10.
- switches 10 reference is made to the preceding explanations in an analogous manner.
- the three driver rollers 43 and the three switches 10 are arranged around the switching shaft 41, offset by 120 °, and are actuated synchronously by rotating the switching shaft 41.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020105113.1A DE102020105113B3 (en) | 2020-02-27 | 2020-02-27 | SWITCH FOR AN ON-LOAD TAP SWITCH AND LOAD CHANGE-OVER SWITCH FOR AN ON-LOAD TAP SWITCH |
PCT/EP2021/052053 WO2021170340A1 (en) | 2020-02-27 | 2021-01-29 | Switch for an on-load tap changer and load transfer switch for an on-load tap changer |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4097749A1 true EP4097749A1 (en) | 2022-12-07 |
Family
ID=74494906
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21702642.6A Pending EP4097749A1 (en) | 2020-02-27 | 2021-01-29 | Switch for an on-load tap changer and load transfer switch for an on-load tap changer |
Country Status (5)
Country | Link |
---|---|
US (1) | US20230045653A1 (en) |
EP (1) | EP4097749A1 (en) |
CN (1) | CN115104167A (en) |
DE (1) | DE102020105113B3 (en) |
WO (1) | WO2021170340A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113835025B (en) * | 2021-09-18 | 2022-05-27 | 广东电网有限责任公司 | On-load tap-changer action simulation test device and test method |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3215803A (en) * | 1962-12-31 | 1965-11-02 | Allis Chalmers Mfg Co | Contact structure for circuit breaker |
US3433915A (en) * | 1967-07-19 | 1969-03-18 | Gen Electric | Contact structure for an electric circuit breaker |
US3691511A (en) * | 1970-10-05 | 1972-09-12 | Bunker Ramo | Plug connection contact with high security against burning off |
DE2329562A1 (en) * | 1973-06-09 | 1975-01-02 | Transformatoren Union Ag | Selector for stepper switches - has spring loaded split contact block which allows two selectors to rotate |
DE102014107273B4 (en) * | 2014-05-23 | 2016-10-27 | Maschinenfabrik Reinhausen Gmbh | Switch for a switching device and diverter switch for an on-load tap-changer of a variable transformer |
UA124231C2 (en) * | 2015-08-28 | 2021-08-11 | Машіненфабрік Райнхаузен Гмбх | Load transfer switch for an on-load tap changer and continuous main switch and disconnecting switch for same |
-
2020
- 2020-02-27 DE DE102020105113.1A patent/DE102020105113B3/en active Active
-
2021
- 2021-01-29 US US17/760,100 patent/US20230045653A1/en active Pending
- 2021-01-29 EP EP21702642.6A patent/EP4097749A1/en active Pending
- 2021-01-29 WO PCT/EP2021/052053 patent/WO2021170340A1/en unknown
- 2021-01-29 CN CN202180014607.3A patent/CN115104167A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2021170340A1 (en) | 2021-09-02 |
US20230045653A1 (en) | 2023-02-09 |
DE102020105113B3 (en) | 2021-06-10 |
CN115104167A (en) | 2022-09-23 |
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