EP3022754A1 - Lastwähler - Google Patents
LastwählerInfo
- Publication number
- EP3022754A1 EP3022754A1 EP14734773.6A EP14734773A EP3022754A1 EP 3022754 A1 EP3022754 A1 EP 3022754A1 EP 14734773 A EP14734773 A EP 14734773A EP 3022754 A1 EP3022754 A1 EP 3022754A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- phase
- load selector
- wall
- switching tube
- oil vessel
- 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
- H01H9/0027—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
- H01H9/0005—Tap change devices
- H01H9/0016—Contact arrangements for tap changers
-
- 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
- H01H9/0044—Casings; Mountings; Disposition in transformer housing
Definitions
- the present invention relates to a load selector.
- the load selector comprises a diverter switch insert with a switching tube rotatable about an axis.
- a first phase, a second phase and a third phase are arranged along the axis of the switching tube.
- Each phase comprises a switching segment each having a resistor arrangement.
- Such load selectors belong to on-load tap-changers (OLTC) and are well known and commonly used in the prior art They serve for the uninterrupted switching between different winding taps of tapped transformers.
- OLTC on-load tap-changers
- on-load tap-changers are actuated by a motor drive when switching over.
- By the motor drive an output or input shaft is moved, which raises a power storage. Is the energy storage fully wound up, d. H. strained, it is unlatched, releases its energy abruptly and actuates in the period of milliseconds (ms) a diverter switch insert, which thereby performs a specific switching sequence during load switching.
- ms milliseconds
- different switch contacts and resistor contacts are actuated in a specific time sequence.
- the switch contacts are used for direct connection of the respective winding tap with the load dissipation, the resistor contacts for short-term wiring, d. H. Bridging by means of one or more switching resistors.
- vacuum interrupters are used as switching elements for load switching. This is based on the fact that the use of vacuum interrupters for load switching prevents arcing in the oil and thus the oil contamination of the diverter switch, as for example in German Patent DE 195 10 809 C1 and DE 40 1 1 019 C1 and German Patent Application DE 42 31 353 A1 and DE 10 2007 004 530 A1.
- Star point load selectors have three phases along the switching tube. The contact systems of the individual phases are in the operating state at a neutral point potential. This is disclosed, for example, in German Offenlegungsschrift DE 32 26 854 A1. In this type of load selectors, all three phases are connected to each other via a metallic pipe section. In addition, they then additionally have a tube piece made of an insulating material put together with the metallic tube piece in order to form a Isolation against earth to take over. Furthermore, then still has to be a linkage with a bottom of an oil vessel of the load selector. A disadvantage of this load selector that Ableit bittere the second and third phase must be individually connected to the pipe section. These phases must then be silvered, so that high costs arise. In addition to the high production costs, this star point load selector is complex due to the individual connections of the phases and the articulation with the ground and thus causes a complicated structure of a load selector.
- the object of the invention is to provide a cost-effective load selector or star point load selector, which is also still simple.
- the load selector comprises a diverter switch insert with a switching tube rotatable about an axis. Three phases are arranged along the axis of the switching tube. Each phase comprises a switching segment each having a resistor arrangement. According to the invention, a flywheel is mounted on the switching tube. Further, the switching tube carries a parallel along the axis to the switching tube extending massive and electrically conductive element which is connected by means of an electrical connection to each phase.
- the star point load selector according to the invention provides that the high-mass element is electrically conductively connected to the flywheel mass. This could for example be done by a screw of two components.
- a preferred embodiment of the invention provides that between the bottom of the neutral load selector and the flywheel, an electrically conductive connecting element is arranged, which is in sliding contact with the ground.
- a discharge contact of the first phase is connected to the high-mass element.
- each of the three phases are associated with a plurality of actuating elements on an inner wall of an oil vessel, which are each attached via at least two retaining elements on the inner wall of the oil vessel.
- a diverter ring is held in the first phase with at least three holding elements on an inner surface of each actuating element.
- One of the at least three holding elements designed for the diverter contact diverter ring comprises an electrical connection element for the diverting contact or diverting ring.
- the electrical connection element is guided by the retaining element to the outer wall of the oil vessel.
- the diverter ring of the second and third phase is formed as a guide ring, which is fastened via at least three holding elements on the inner wall of the oil vessel. It is preferred that the guide ring has no electrically conductive property and thus can be made of a konten monten material. It is further provided that each stage contact is provided on an inner surface of each actuating element with an electrical connection element for the respective stage contact. About the associated holding element, the electrical connection element is guided to the outer wall of the oil vessel.
- the load selector according to the invention also has the advantage that the costly and cost-intensive connection of the silvered phases of the diverting contacts used hitherto by the direct electrical connection with the high-mass element of the individual phases is avoided.
- the individual phases can be connected to the massive element inside the oil vessel.
- FIG. 1 is a perspective view of a three-phase load selector
- Fig. 2 is a sectional view of the load selector along that shown in Fig. 1
- Section line A-A; Fig. 3 is a perspective view of the diverter switch insert of the three-phase
- Fig. 4 is another perspective view of the diverter switch insert of the three-phase load selector of Fig. 1, showing the three resistors mounted on the switch tube and the high-mass element;
- Fig. 5 is a sectional view of the load selector in the form of an inventive
- FIG. 6 is a perspective sectional view of the star point load selector of Figure 5 from below, in which the flywheel mass is electrically connected to the massive element and the ground ..;
- Fig. 7 is a schematic illustration of one of a plurality of actuators forming the actuator assembly of each phase;
- Fig. 8 is another perspective sectional view to illustrate the inner
- FIG. 1 shows a perspective view of a three-phase on-load tap changer or load selector 1 according to the invention.
- the load selector 1 has a drive 3, such as an electric motor, with a gear 5, which raises a power storage, not shown. If the stored energy is fully absorbed, ie tensioned, it is unlatched, releases its energy abruptly and actuates a switching tube 15 of a diverter switch insert 14.
- the rotating switching tube 15 is held in an oil vessel 18.
- the oil vessel 18 is closed at the top with a lid 19 and also carries a bottom 21st
- the load selector 1 according to the invention has a first phase L1, a second phase L2 and a third phase L3, which are arranged one above the other in the oil vessel 18.
- Over the three phases L1, L2, L3 sits a preselector 37.
- electrical connection elements 38 are provided for preselector contacts on the oil vessel wall 17 of the oil vessel 18.
- Electrical connection elements 39 for step contacts 392 (see FIGS. 5, 7, 8) of the three phases L1, L2, L3 are likewise arranged on the load selector 1 in such a way that they engage through the oil vessel wall 17 of the oil vessel 18.
- Fig. 2 shows a sectional view taken along the line AA of Fig. 1 of the load selector 1, wherein a plan view of the phase L1 is shown.
- a plurality of the contour of the inner wall 20 of the oil vessel 18 adapted actuating elements 50, which constitute an actuating arrangement 41, are arranged on an inner wall 20 of the oil vessel 18 for the second phase L2 .
- Electrical connection elements 39 for the step contacts 392 (see Fig. 5, 7, 8) engage through the corresponding actuators 50 and through the oil vessel wall 17 to the outer wall 16.
- Umbrella caps 30 on the outer wall 16 of the oil vessel 18 hold on the inner wall 20 of the oil vessel 18 arranged actuating elements 50.
- the umbrella caps 30 rest on the outer wall 16 of the oil vessel 18.
- Each of the actuating elements 50 has at least two control cams 51, 52 (see FIG. 7) which cooperate with corresponding and provided with rollers 43 operating levers 45 of the switching segment 25 of the corresponding phase L1, L2, L3.
- the switching tube 15 carries in each phase L1, L2, L3 a holder 40 to which a massive element 36, the respective resistor assembly 27 and the respective switching segment 25 are mounted.
- the switching segment 25 is mounted such that the Rolls 43 of the actuating lever 45 with the corresponding control cams 51, 52 of the actuators 50 cooperate.
- FIG. 3 and 4 show various perspective views of the diverter switch insert 14 of the three-phase load selector 1 according to FIG. 1.
- Three switching segments 25 are attached to the switching tube 15 of the diverter switch insert 14, so that the load selector 1 is subdivided into the three phases L1, L2, L3.
- resistance circuits 27, which are assigned to the individual phases L1, L2, L3 of the load selector 1 are likewise fastened to the switching tube 15.
- By turning the switching tube 15 contacts 29S for stage contacts or contacts 29A for Ableitcredite can be connected directly, the contacts 29S, 29A with corresponding and not shown Ableitcard 391 (only in the first phase L1) or the stage contacts 392, also not shown cooperate (see Fig. 8).
- a predetermined switching sequence is realized by means of the control cams 51, 52 (see FIG. 7), in which a plurality of vacuum interrupters (not shown) are opened or closed in the individual switching segments 25.
- a flywheel mass 35 is mounted on the switching tube 15.
- the switching tube 15 carries a massive element 36, as described below.
- FIG. 5 shows a perspective sectional view of the load selector 1 in the form of a star point load selector.
- This load selector 1 comprises a rotatable about an axis A switching tube 15 and the three phases L1, L2, L3, which are arranged along the axis A of the switching tube 15.
- the load selector 1 in each of the phases L1, L2, L3 comprises a switching segment 25 each having a resistance arrangement 27 (see FIG. 4).
- a flywheel mass 35 is mounted on the switching tube 15. Furthermore, the switching tube 15 carries a parallel along the axis A to the switching tube 15 extending massive and electrically conductive element 36, which is connected by means of an electrical connection 55 with each phase L1, L2, L3.
- the massive element 36 and the flywheel 35 are needed in particular to support the temporal movement sequence of the switching operation, so that the rotation of the switching tube 15 causing triggering of the energy storage (not shown) performs a defined circuit or defined setting of the individual switching states of the Lastschlers 1.
- the load selector 1 provides that the high-mass element 36 is electrically conductively connected to the flywheel mass 35. This could be done for example via a screw 54 of the flywheel mass 35 with the massive element 36, as shown in Fig. 6.
- the high-mass element 36 and the flywheel 35 are preferably made of metal or an electrically conductive material, as well as the bottom 21 of the load selector 1 is made of metal, all metallic and electrically conductive parts should basically be at the same potential (neutral point potential).
- an electrically conductive connecting element 53 is arranged, which is in sliding contact with the bottom 21. This function could for example take over a spring-loaded connecting element 53.
- FIG. 7 shows a schematic representation of a plurality of actuating elements 50 for forming the actuating arrangement 41 (see FIG. 2), which are arranged on the inner wall 20 of an oil vessel 18 in each phase L1, L2, L3.
- Each actuating element 50 is fastened to the inner wall 20 of the oil vessel 18 via at least two retaining elements 31.
- one of the three holding elements 31 for the discharge ring 391 of the first phase L1 comprises a single electrical connection element 68 for the discharge ring 391, which is guided to the outer wall 16 of the oil container 18.
- each of the diverter ring 391 of the second and third phase L2, L3 is formed as a guide ring, which is also attached via at least three retaining elements 31 on the inner wall 20 of the oil vessel 18.
- the guide ring 391 are assigned no electrical connection elements, so that it can be made of a non-conductive and inexpensive material.
- the step contacts 392 are also supported via holding elements 31 on the inner surface 65 (see FIG. 7) of each actuating element 50. In this case, then an electrical connection element 39 of the respective stage contact 391 is guided to the outer wall 16 of the oil vessel 18.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013107557.6A DE102013107557B4 (de) | 2013-07-16 | 2013-07-16 | Lastwähler |
PCT/EP2014/063261 WO2015007476A1 (de) | 2013-07-16 | 2014-06-24 | Lastwähler |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3022754A1 true EP3022754A1 (de) | 2016-05-25 |
EP3022754B1 EP3022754B1 (de) | 2018-08-29 |
Family
ID=51062794
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14734773.6A Active EP3022754B1 (de) | 2013-07-16 | 2014-06-24 | Lastwähler |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3022754B1 (de) |
CN (1) | CN105531782B (de) |
DE (1) | DE102013107557B4 (de) |
UA (1) | UA119237C2 (de) |
WO (1) | WO2015007476A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3086342A1 (de) * | 2015-04-21 | 2016-10-26 | ABB Technology Ltd | Fester kontakt für einen stufenschalter und verfahren zur montage eines kabelschuhs daran |
DE102021116421A1 (de) | 2021-06-25 | 2022-12-29 | Maschinenfabrik Reinhausen Gmbh | Schaltereinheit |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2231627A (en) * | 1934-04-20 | 1941-02-11 | Jansen Bernhard | Step switch device for regulating transformers |
DE705659C (de) * | 1938-03-09 | 1941-05-06 | Bernhard Jansen Dr Ing | Stufenschalteinrichtung fuer Anzapftransformatoren |
DE3226854A1 (de) * | 1982-07-17 | 1984-01-19 | Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg | Lastwaehler fuer stufentransformatoren mit einem schrittweise drehbaren schaltrohr |
DE3833126C2 (de) * | 1988-09-29 | 1995-11-30 | Reinhausen Maschf Scheubeck | Lastwähler für Stufentransformatoren |
DE4011019C1 (de) * | 1990-04-05 | 1991-12-05 | Maschinenfabrik Reinhausen Gmbh, 8400 Regensburg, De | |
JPH03289111A (ja) * | 1990-04-06 | 1991-12-19 | Toshiba Corp | 負荷時タップ切換器 |
DE4231353C2 (de) * | 1991-09-19 | 1997-07-24 | Toshiba Kawasaki Kk | Stufenschalter |
DE19510809C1 (de) * | 1995-03-24 | 1996-07-04 | Reinhausen Maschf Scheubeck | Lastumschalter eines Stufenschalters |
DE19821775C1 (de) * | 1998-05-14 | 1999-10-14 | Reinhausen Maschf Scheubeck | Lastwähler |
KR100814514B1 (ko) * | 2006-01-27 | 2008-03-17 | 가부시끼가이샤 도시바 | 부하시 탭 전환 장치 |
EP2054898A4 (de) * | 2006-08-25 | 2015-04-22 | Abb Technology Ltd | Widerstand für eine elektrische hochspannungsvorrichtung und verfahren zum anbringen eines widerstands |
JP4660490B2 (ja) * | 2007-01-11 | 2011-03-30 | 株式会社東芝 | 負荷時タップ切換装置 |
CN101383222B (zh) * | 2008-02-26 | 2010-06-23 | 上海华明电力设备制造有限公司 | 一种外挂组合式有载分接开关 |
DE202011109824U1 (de) * | 2011-01-20 | 2012-04-03 | Maschinenfabrik Reinhausen Gmbh | Stufenschalter |
WO2012134977A1 (en) * | 2011-03-25 | 2012-10-04 | Abb Technology Ag | Tap changer having a vaccum interrupter assembly with an improved damper |
-
2013
- 2013-07-16 DE DE102013107557.6A patent/DE102013107557B4/de active Active
-
2014
- 2014-06-24 CN CN201480047286.7A patent/CN105531782B/zh active Active
- 2014-06-24 UA UAA201600300A patent/UA119237C2/uk unknown
- 2014-06-24 EP EP14734773.6A patent/EP3022754B1/de active Active
- 2014-06-24 WO PCT/EP2014/063261 patent/WO2015007476A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2015007476A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN105531782A (zh) | 2016-04-27 |
DE102013107557A1 (de) | 2015-01-22 |
EP3022754B1 (de) | 2018-08-29 |
CN105531782B (zh) | 2018-07-03 |
WO2015007476A1 (de) | 2015-01-22 |
DE102013107557B4 (de) | 2017-02-23 |
UA119237C2 (uk) | 2019-05-27 |
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