EP3970172A1 - Laststufenschalter - Google Patents
LaststufenschalterInfo
- Publication number
- EP3970172A1 EP3970172A1 EP20728481.1A EP20728481A EP3970172A1 EP 3970172 A1 EP3970172 A1 EP 3970172A1 EP 20728481 A EP20728481 A EP 20728481A EP 3970172 A1 EP3970172 A1 EP 3970172A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- load
- vacuum interrupter
- contact
- tap
- load branch
- 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
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0038—Tap change devices making use of vacuum switches
-
- 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
Definitions
- the invention relates to an on-load tap-changer for uninterrupted switching between winding taps of a tapped transformer.
- Known on-load tap-changers usually consist of a selector for the powerless selection of the respective winding tap of the transformer to which the switch is to be made, and a load switch for the actual load switching from the previous winding tap to the new, selected winding tap. Switching is done by mechanical actuation of different switches. With increasing loads, i.e. higher currents and voltages, the requirements placed on the actuation mechanism are also increased.
- an on-load tap-changer for uninterrupted switching between winding taps of a tapped transformer which has a selector for powerless preselection on a selected winding tap to be switched to, and a diverter switch for the actual load switching from the previous winding tap to the preselected winding tap .
- the diverter switch comprises a first and a second load branch and at least one vacuum interrupter in the first and second load branch.
- Each vacuum interrupter has a movable contact and a fixed contact and can have an open state in which the movable contact and the fixed contact do not touch, and a closed state in which the movable contact and the fixed contact are in at least one point of contact touch, ingest.
- each vacuum interrupter has a defined, spherical area.
- the vacuum switching tubes of the diverter switch are arranged in a housing such that parts of the diverter switch through which current flows are outside the defined range.
- the diverter switch is designed in such a way that when the vacuum interrupters are actuated from the closed supply stood in the open state those parts of the diverter switch, which at that time point are flowing through current, are arranged outside the defined area.
- the spherical area around the contact point has a radius of at least 80 mm and at most 200 mm.
- current-carrying parts of the diverter switch are a first electrical line of the first load branch and / or a second electrical line of the second load branch and / or a third electrical line of the first load branch and / or a fourth electrical line of the second load branch and / or electrically conductive connecting elements and / or a first mechanical switching contact and / or a second mechanical switching contact and / or transition resistors and / o the vacuum interrupters in the closed state, which are arranged outside the spherical loading area of a vacuum interrupter.
- the first load branch of the diverter switch comprises a first vacuum interrupter and a second vacuum interrupter.
- At least the first line, the second line, the second vacuum interrupter of the first load branch, a third line and the first mechanical switching contact are arranged outside the defined area of the first vacuum interrupter of the first load branch.
- the second load branch of the diverter switch comprises a first vacuum interrupter and a second vacuum interrupter.
- At least the first line, the second line, the second vacuum interrupter of the second load branch, a fourth line and the second mechanical switching element are arranged outside the defined area of the first vacuum interrupter of the second load branch.
- At least the second vacuum interrupter of the second load branch, the third line, the fourth line and the mechanical switching elements are arranged outside the defined area of the second vacuum interrupter of the first load branch. According to at least one embodiment, at least the second vacuum interrupter of the first load branch, the third line, the fourth line and the mechanical switching elements are arranged outside the defined area of the second vacuum interrupter of the second load branch.
- the first winding tap is electrically connected via a series connection of a first vacuum interrupter and a second vacuum interrupter via the first load branch to a load dissipation and the second winding tap is connected via a series connection of a first vacuum interrupter and a second vacuum interrupter via the second load branch electrically connected to the load transfer.
- a transition resistor is arranged in each case parallel to the first vacuum interrupter of the first and the second load branch.
- the transition resistors are arranged outside the defined area of the second vacuum interrupter of the first load branch and outside of the defined area of the second vacuum interrupter of the second load branch.
- the first mechanical switching contact is arranged between the second vacuum interrupter of the first load branch and the load diverter and the second mechanical switching contact is arranged between the second vacuum interrupter of the second load branch and the load derivation device.
- the mechanical switching contacts are arranged outside of the defined area of the vacuum interrupters.
- the mechanical switching contacts are designed as isolating switches.
- the first and the second vacuum interrupter are electrically connected to one another via the first electrical line and second vacuum interrupter and the first mechanical switching element via the third electrical line in the first load branch and the first and second vacuum interrupter are via the second load branch the second line and the second vacuum interrupter and the first mechanical switching element electrically connected to one another via the fourth line.
- the electrical lines are each connected in an electrically conductive manner to the vacuum interrupters via connecting elements.
- the lines each have a first end and a second end, the first end being electrically connected via the connecting element to the movable contact of the vacuum interrupter and the second end being electrically connected via the connecting element to the fixed contact of the vacuum interrupter.
- a permanent main contact is additionally provided parallel to each load branch, which takes over at least part of the continuous current flow in stationary operation and is in an electrically conductive connection directly with the load derivation.
- the vacuum interrupters are arranged in a circle around a control shaft.
- the first and the second mechanical switching contact are arranged in mirror image to an axis, the axis lying on the switching shaft.
- two vacuum interrupters are arranged in mirror image to the axis.
- Figure 1 is a schematic representation of a step transformer with a
- FIG. 2 shows a schematic representation of the winding taps of a step transformer
- FIG. 3 shows a schematic representation of an exemplary embodiment of an on-load tap-changer according to the improved concept
- FIGS. 4a to 4f show an exemplary switching sequence of the on-load tap-changer from FIG. 3;
- FIG. 5 shows an exemplary embodiment of a diverter switch according to the improved concept
- FIG. 6 shows a further view of the exemplary embodiment from FIG. 5
- FIG. 7 shows a further view of the exemplary embodiment from FIG. 5;
- FIG. 8 shows a further view of the exemplary embodiment from FIG.
- FIG. 1 shows a schematic representation of a step transformer 2 with a load step switch 1, which has a selector 3 and a diverter switch 4.
- the load step switch 1 is driven by a motor 22.
- FIG. 2 shows schematically a regulating winding 25 of the step transformer 2 (see FIG. 1) with different winding taps Ni, Nj, N n .
- the winding taps Ni, Nj, N N are switched on and off by the on-load tap-changer 1.
- the disconnection or connection can be implemented by any means, such as a selector 3, a load switch 4, etc., are implemented.
- the on-load tap-changer 1 is actuated via the motor 22.
- FIG. 3 shows a schematic illustration of an exemplary embodiment of an on-load tap-changer 1.
- the on-load tap-changer 1 comprises a selector 3 with at least a first fixed contact 23.1 and a second fixed contact 23.2, which can each be connected to a winding tap Ni, ..., Nj, ..., N N of the step transformer 2 .
- the total number of fixed contacts depends on the number of winding taps Ni, ..., Nj, ..., N N N.
- the on-load tap changer 1 has a first movable selector contact 24.1 and a second movable selector contact 24.2, which can contact the individual fixed contacts 23.1, 23.2 of the rule 25 winding.
- the on-load tap changer 1 also includes a load switch 4, with a first load branch 5.1 and a second load branch 5.2.
- the first load branch 5.1 connects the first fixed contact 23.1 via a series circuit of a first vacuum interrupter 6.1 and a second vacuum interrupter 6.2 with the load dissipation 8
- the second load branch 5.2 connects the second fixed contact 23.2 via a series circuit from a first vacuum interrupter 7.1 and a second vacuum interrupter 7.2 with the load dissipation 8.
- a first mechanical switching element 18.1 is arranged between the second vacuum interrupter 6.2 and the load dissipation 8, and a second mechanical switching element is located between the second vacuum interrupter 7.2 and the load dissipation 8
- a first line 10.1 connects the first vacuum interrupter 6.1 and the second vacuum interrupter 6.2 to one another in an electrically conductive manner and a second line
- Figure 2 shows the on-load tap-changer 1 in a stationary state in which at least part of the load current flows from the winding tap via the permanent main contact 19.1 via the first fixed contact 23.1 to the load dissipation 8, in particular a larger part than via the load branch 5.1.
- a step a the permanent main contact 19.2 is closed or remains closed.
- the on-load tap-changer 1 is in the stationary state, in which at least part of the load current flows through the permanent main contact 19.2 from the corresponding winding tap N + i via the second fixed contact 23.2 to the load dissipation 8, in particular a larger part than through the load branch 5.2.
- a step b the permanent main contact 19.2 is opened and the first mechanical switching contact 18.1 is closed.
- the current now flows through the first vacuum switchover tube 7.1 of the second load branch 5.2, the second line 10.2, the second vacuum switchover tube 7.2 of the second load branch 5.2, the fourth line 10.4 and the second mechanical switching contact 18.2 for load dissipation 8.
- a step c the first vacuum interrupter 7.1 of the second load branch 5.2 is opened.
- the second vacuum interrupter 7.2, the fourth line 10.4 and the second mechanical switching contact 18.2 are current-carrying and spatially outside the defined area 14 (see, for example, FIGS. 6-8) of the vacuum interrupter 7.1.
- the current then flows from the fixed contact 23.2 via the transition resistor 9.2, the second vacuum interrupter 7.2, the fourth line 10.4 and the second mechanical switching contact 18.2 to the load dissipation 8.
- step d the second vacuum interrupter 6.2 of the first load two tot 5.1 is closed.
- the load current is now divided between the first load branch 5.1 and the second load branch 5.2.
- a circular current is superimposed.
- a step e the second vacuum interrupter 7.2 of the second load branch 5.2 is opened.
- the current then flows from the fixed contact 23.1 via the transition resistor 9.1, the second vacuum interrupter 6.2 of the first load branch 5.1, the third line 10.3 and the first mechanical switching contact 18.1 to the load discharge device 8.
- a step f (cf. FIG. 4f), the first vacuum interrupter 6.1 of the first load branch 5.1 is closed.
- the current now flows through the first vacuum interrupter 6.1, the first line 10.1, the second vacuum interrupter 6.2, the third line 10.3 and the first mechanical switching contact 18.1 for load dissipation 8.
- step g the permanent main contact 19.1 in the first load branch 5.1 is closed and the second mechanical switching contact 18.2 in the second load branch 5.2 opens.
- the on-load tap-changer 1 is again in the stationary state, as shown and explained in FIG. 3.
- FIGS 5 and 6 each show an exemplary embodiment of a diverter switch 4 according to the improved concept, with the purpose of clarity of the load transfer Switch 4 is shown from two different side perspectives.
- the four vacuum interrupters 6.1, 6.2, 7.1, 7.2 are arranged in a circle around a control shaft 20 and each have a movable contact 11 and a fixed contact 12.
- the vacuum interrupters 6.1 and 6.2 are electrically connected to one another lei tend via the first electrical line 10.1 and the vacuum interrupters 7.1 and 7.2 via the second electrical line 10.2.
- the electrically conductive connection is implemented via connecting elements 17, which are designed, for example, as screws and / or braids.
- the first end of the first electrical line 10.1 is electrically connected via a connecting element 17 to the movable contact 11 of the vacuum interrupter 6.1 and the second end is electrically connected via a connecting element 17 to the fixed contact 12 of the vacuum interrupter 6.2.
- the first end of the second line 10.2 is electrically connected via a connec tion element 17 to the movable contact 11 of the vacuum interrupter 7.1 and the second end is electrically connected via a connecting element 17 to the fixed contact 12 of the vacuum interrupter 7.2.
- the movable contact 11 and the fixed contact 12 of each vacuum interrupter 6.1, 6.2, 7.1, 7.2 touch in the closed state of the vacuum interrupter in at least one point 13.
- each vacuum interrupter defines 6.1, 6.2, 7.1, 7.2 each have a spherical area 14.
- the contacts 1 1 and 12, the contact point 13 of which in FIGS. 4 and 5 are shown only on a few vacuum switching tubes and are provided with a reference number.
- FIGS 7 and 8 each show an exemplary embodiment of the diverter switch in plan view.
- the diverter switch 4 has a housing 29 in which the Vakuumschaltröh Ren 6.1, 6.2, 7.1 and 7.2 are arranged.
- the housing 29 is essentially cylindrically shaped and constructed from a GRP plastic.
- the vacuum interrupters 6.1 and 6.2 are arranged in the housing 29 as a mirror image of the vacuum interrupters 7.1 and 7.2.
- the vacuum interrupter 7.2 is opposite the vacuum interrupter
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019115970.9A DE102019115970A1 (de) | 2019-06-12 | 2019-06-12 | Laststufenschalter |
| PCT/EP2020/064552 WO2020249391A1 (de) | 2019-06-12 | 2020-05-26 | Laststufenschalter |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3970172A1 true EP3970172A1 (de) | 2022-03-23 |
| EP3970172C0 EP3970172C0 (de) | 2025-08-20 |
| EP3970172B1 EP3970172B1 (de) | 2025-08-20 |
Family
ID=70857190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20728481.1A Active EP3970172B1 (de) | 2019-06-12 | 2020-05-26 | Laststufenschalter |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP3970172B1 (de) |
| JP (1) | JP7610536B2 (de) |
| KR (1) | KR102846496B1 (de) |
| CN (1) | CN114127878B (de) |
| DE (1) | DE102019115970A1 (de) |
| WO (1) | WO2020249391A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018130869A1 (de) * | 2018-12-04 | 2020-06-04 | Maschinenfabrik Reinhausen Gmbh | Lastumschalter für Laststufenschalter und Laststufenschalter |
| CN114446620B (zh) * | 2022-02-15 | 2025-11-21 | 西安交通大学 | 一种有载分接开关双电阻往复式过渡电路及调压方法 |
| CN114446622B (zh) * | 2022-02-15 | 2025-08-05 | 西安交通大学 | 一种有载分接开关单隔离触点过渡电路及调压方法 |
| DE102022117592A1 (de) * | 2022-07-14 | 2024-01-25 | Maschinenfabrik Reinhausen Gmbh | Laststufenschalter und Verfahren zur Betätigung eines Laststufenschalters |
| CN116705532A (zh) * | 2022-12-29 | 2023-09-05 | 中国电力科学研究院有限公司 | 用于有载分接开关的分接变换过渡电路及有载分接开关 |
| EP4404228B1 (de) * | 2023-01-23 | 2025-08-27 | Hitachi Energy Ltd | Laststufenschalter und verfahren zum betreiben eines laststufenschalters |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014100421B3 (de) * | 2014-01-15 | 2015-01-15 | Maschinenfabrik Reinhausen Gmbh | Schalter für eine Schaltvorrichtung mit Schaltwelle, dessen Verwendung in einem Lastumschalter, Schaltvorrichtung mit Schaltwelle und Schalter, deren Verwendung in einem Laststufenschalter, Lastumschalter für Laststufenschalter sowie Regeltransformator |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2348091C2 (de) * | 1973-09-25 | 1975-08-28 | Maschinenfabrik Reinhausen Gebrueder Scheubeck Kg, 8400 Regensburg | Dreiphasiger zylindrischer Lastumschalter für Stufenschalter von Stufentransformatoren |
| JPS5792813A (en) * | 1980-12-01 | 1982-06-09 | Toshiba Corp | On-load tap changer |
| JPS59125418A (ja) * | 1983-01-07 | 1984-07-19 | Mitsubishi Electric Corp | 負荷時タツプ切換装置 |
| JP2003188031A (ja) | 2001-12-18 | 2003-07-04 | Toshiba Corp | 負荷時タップ切換器 |
| DE202009018524U1 (de) * | 2009-10-08 | 2012-01-31 | Maschinenfabrik Reinhausen Gmbh | Stufenschalter |
| KR101452892B1 (ko) | 2013-10-30 | 2014-10-22 | 현대중공업 주식회사 | 탭 절환기 |
| JP6282547B2 (ja) | 2014-07-15 | 2018-02-21 | 株式会社東芝 | 負荷時タップ切換装置 |
| CN104465168A (zh) * | 2014-12-12 | 2015-03-25 | 国家电网公司 | 一种真空式有载分接开关过渡电路及操作方法 |
| JP6523099B2 (ja) * | 2015-08-18 | 2019-05-29 | 株式会社東芝 | 負荷時タップ切換装置および負荷時タップ切換装置の製造方法 |
| CN113874969B (zh) * | 2019-05-30 | 2024-07-02 | 株式会社东芝 | 负载时抽头切换器的切换开闭器以及负载时抽头切换器 |
| JP2022125418A (ja) * | 2021-02-17 | 2022-08-29 | 株式会社ユニバーサルエンターテインメント | 遊技機 |
-
2019
- 2019-06-12 DE DE102019115970.9A patent/DE102019115970A1/de active Pending
-
2020
- 2020-05-26 JP JP2021573498A patent/JP7610536B2/ja active Active
- 2020-05-26 KR KR1020217043455A patent/KR102846496B1/ko active Active
- 2020-05-26 CN CN202080051917.8A patent/CN114127878B/zh active Active
- 2020-05-26 EP EP20728481.1A patent/EP3970172B1/de active Active
- 2020-05-26 WO PCT/EP2020/064552 patent/WO2020249391A1/de not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014100421B3 (de) * | 2014-01-15 | 2015-01-15 | Maschinenfabrik Reinhausen Gmbh | Schalter für eine Schaltvorrichtung mit Schaltwelle, dessen Verwendung in einem Lastumschalter, Schaltvorrichtung mit Schaltwelle und Schalter, deren Verwendung in einem Laststufenschalter, Lastumschalter für Laststufenschalter sowie Regeltransformator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114127878A (zh) | 2022-03-01 |
| EP3970172C0 (de) | 2025-08-20 |
| JP7610536B2 (ja) | 2025-01-08 |
| WO2020249391A1 (de) | 2020-12-17 |
| EP3970172B1 (de) | 2025-08-20 |
| DE102019115970A1 (de) | 2020-12-17 |
| CN114127878B (zh) | 2025-12-19 |
| JP2022536704A (ja) | 2022-08-18 |
| KR102846496B1 (ko) | 2025-08-13 |
| KR20220008356A (ko) | 2022-01-20 |
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