EP2815413A1 - On-load tap changer having at least two vacuum interrupters, and drive for a load changeover switch having at least two vacuum interrupters - Google Patents
On-load tap changer having at least two vacuum interrupters, and drive for a load changeover switch having at least two vacuum interruptersInfo
- Publication number
- EP2815413A1 EP2815413A1 EP13700559.1A EP13700559A EP2815413A1 EP 2815413 A1 EP2815413 A1 EP 2815413A1 EP 13700559 A EP13700559 A EP 13700559A EP 2815413 A1 EP2815413 A1 EP 2815413A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cam
- spindle
- changer
- movable contact
- load tap
- 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
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/40—Driving mechanisms, i.e. for transmitting driving force to the contacts using friction, toothed, or screw-and-nut gearing
-
- 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
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
Definitions
- the present invention relates to an on-load tap changer having at least two vacuum sheath tubes.
- the on-load tap changer comprises a selector for selecting a respective winding tap of a tapped transformer, a diverter switch for switching from the connected winding tap to the preselected winding tap, a rotatable drive shaft mechanically coupled to the selector, and a transmission for actuating a movable contact of a respective vacuum interrupter.
- the invention further relates to a drive for a diverter switch with at least two Vakuumschaitube.
- On-load tap-changers of the type described in the introduction are well-known and commonly used in the prior art. They are used for uninterrupted switching between different winding taps of tapped transformers.
- Such on-load tap changer consist of a diverter switch and a selector arranged underneath.
- the selector is used for powerless selection of the respective new winding tapping of the tapped transformer to be switched to.
- the diverter switch is used for subsequent, rapid and uninterrupted changeover from the connected to the new, preselected winding tap.
- the entire on-load tap-changer is operated by a motor drive during the Umschaitung.
- a rotating drive shaft continuously moves the selector, at the same time a power supply of the diverter switch is raised. Is the energy storage fully wound up, d. H. strained, he is unlatched, releases his energy abruptly and operates in the period of milliseconds (ms) the diverter switch.
- the diverter switch performs a specific switching sequence, ie different switching contacts and resistance contacts are actuated in a certain time sequence in succession or overlapping.
- the switch contacts serve for direct connection of the respective winding tap with the load dissipation, the resistor contacts for short-term shading, ie bridging means of one or more switching resistors.
- vacuum sight tubes are used as switching elements for load switching. This is due to the fact that the use of vacuum shunt tubes for load switching arc formation in the oil and thus prevents the oil pollution of the diverter switch, as described for example in German Patent DE 195 10 809 C1 and DE 40 11 019 C1 and the German patents DE 42 31 353 A1 and DE 10 2007 004 530 A1.
- a diverter switch carries a drive shaft with at least one cam.
- the cam has a plurality of control cams, wherein two arranged on the cam front control cams have a deviating from a circular contour in the manner of cams on the contact a respective connected via a rocker arm with a vacuum interrupter roller is performed, the profiled contour of the respective control cam taps.
- the object of the invention is therefore to provide a space-saving on-load tap-changer with at least two vacuum interrupters, which simultaneously ensures a forementionedsunan 1971e, safe and fast load switching and allows long-lasting operation.
- the object of the invention is also to provide a drive for a diverter switch with at least two vacuum interrupters, which ensures an error-free, safe and fast load switching. This object is achieved by a drive for a diverter switch with at least two vacuum interrupters according to claim 9.
- the on-load tap-changer with at least two vacuum interrupters comprises a selector for selecting a respective winding tap of a stage transformer and a load changeover switch for switching from the connected winding tap to the preselected winding tap.
- the on-load tap changer has a rotatable drive shaft mechanically coupled to the selector and a transmission for actuating a movable contact of a respective vacuum interrupter.
- a spindle which is movable in the direction of the axis and coupled to the movable contact is provided which can be actuated via the transmission.
- the movable contact consists of an upper plunger and other components for electrical transmission.
- each vacuum interrupter on a lower plunger Ie.
- the transmission has at least one cam, a spindle nut and at least one driver formed on the spindle nut in the direction of the axle.
- the spindle nut is axially fixed, but rotatably mounted.
- the at least one driver also called pin or driving pin in mechanical engineering, is designed on the spindle nut in such a way that, during a rotational movement, it also causes the spindle nut to rotate, ie takes it along.
- the spindle nut in turn converts the rotary movement into an axial movement of the spindle.
- the at least one cam plate carries at least one cam, i. H.
- the cam has a contour deviating from its circular shape.
- a first cam carries a first cam and a second cam a second cam.
- the first cam interacts with the at least one first driver and the second cam with the at least one second driver of the spindle nut.
- the transmission described in the two embodiments is a cam gear.
- At least one bearing for the spindle and the spindle nut is provided, which is designed as a rolling bearing, sliding screw and / or ball screw.
- the at least one bearing is a ball screw.
- Ball screws are characterized in that roll between the spindle nut and the spindle rolling elements in the form of balls in grooves and thus secure movements with high efficiency. Compared to conventional sliding screws, or so-called Wälzschraubtrieben, is reduced by the point system of the balls, the drive power, reduces wear of the WälzSystemterrorismen, increased achievable travel speed and higher
- an anti-rotation device which secures the spindle against rotation.
- This rotation can, for example, be a roller bearing or an axial lock as a sleeve. It is obvious to the person skilled in the art that other anti-rotation devices are also conceivable, since various safeguards against twisting of a spindle are disclosed in the prior art.
- a compression spring is disposed between the spindle and the movable contact, which mechanically biases the movable contact in the direction of the axis of the diverter switch. This is due to the fact that with a load switching between the movable contact and the spindle numerous small discharges take place, so that it comes to the two components to a mutual material removal, also called contact or electrode burn.
- the compression spring is intended to compensate for the material removal caused by the change in the distance between the contacts and thus create constant conditions for a diverter switch.
- an axial clearance between the bearing unit and the movable contact is also provided in a bearing unit for supporting the movable contact.
- An advantage of the on-load tap changer according to the invention is that only one axial movement of each movable contact and each coupled thereto spindle are to perform at a load switching. Thus, a faster, safer and tilt-free stroke for opening and closing the vacuum interrupters is possible. At the same time a fast stroke is also ensured by the above-described increased speed of the spindle.
- Another advantage of the on-load tap-changer according to the invention is that due to the axial arrangement of each movable contact and spindle, further components of mechanical switches, such as rocker arms, breakers, etc. can be dispensed with.
- the inventive drive for a diverter switch with at least two vacuum interrupters comprises a rotatable drive shaft and a transmission for actuating a movable contact of a respective vacuum interrupter.
- a spindle is mechanically coupled to the movable contact, wherein the spindle is rotatable via the transmission, so that a movement of the contact in the direction of an axis of the diverter switch is effected.
- the gear has at least one cam, each carrying at least one cam, a spindle nut and at least one formed on the spindle nut in the direction of the axis driver, which cooperates with the at least one cam of the respective cam.
- FIG. 1 is a schematic perspective view of an embodiment of the load tap changer according to the invention in an open circuit:
- FIG. 2 shows a schematic perspective view of the on-load tap-changer according to FIG. 1 with a closed circuit
- Figure 3 is a side view of a diverter switch of the on-load tap-changer of the present invention in an open circuit, with a compression spring interposed between a spindle and the movable contact.
- Fig. 4 is a side view of the diverter switch of FIG. 3 in a closed circuit.
- FIG. 1 shows a schematic perspective view of an embodiment of the on-load tap-changer 1 according to the invention.
- the on-load tap-changer 1 shows only one vacuum interrupter 3, but the on-load tap-changer 1 always has at least two vacuum interrupters 3.
- a selector 7 is used to select a respective winding tap n, n + 1 of a tapped transformer 9.
- a diverter switch 5 causes the switching from the connected winding tap n to the respective preselected winding tap n + 1.
- the on-load tap-changer 1 has a rotatable drive shaft 1 1.
- a gear 15, which is connected to the drive shaft 1 1, serves to actuate a movable contact 17 (shown in more detail in FIGS.
- the drive shaft 11 is mechanically coupled to the selector 7 and moves it continuously. At the same time an energy storage 13 of the diverter switch 5 is mounted. If the energy accumulator 13 is fully wound up, it is unlatched, releases its energy abruptly and actuates the diverter switch 5 in the ms range via the drive shaft 11.
- the transmission 15 has in this embodiment a first cam 21 A and a second cam 21 B, a spindle nut 23 and three on the spindle nut 23 formed in the direction of the axis A driver 25A, 25B. It is also conceivable, however, that further embodiments have more than just two cams 21 A, 21 B or more or less than three catches 25 A, 25 B formed on the spindle nut 23.
- the first and the second cam 21 A, 21 B respectively carry a first and second cam 27 A, 27 B.
- Other embodiments may also include more than one cam 27A, 27B on each cam 21A, 21B.
- the first cam 27A of the first cam 21A thus interacts with at least one of the two drivers 25A and the second cam 27B of the second cam 21 B with the second driver 25B of the spindle nut 23.
- Each driver 25A, 25B is taken so long in the respective cam 27A, 27B in a rotational movement ⁇ of the first and second cam 21 A, 21 B, until it emerges again from the respective cam 27A, 27B.
- At least one bearing 29 for the spindle 19 and the spindle nut 23 is provided.
- the bearing 29 is a ball screw.
- Ball screws are characterized in that between the spindle nut 23 and the spindle 19, rolling elements (not shown) roll in the form of balls in grooves 31 and thus secure axial movements with high efficiency.
- a further embodiment of the on-load tap-changer 1 according to the invention provides an anti-rotation device 33, so that the spindle 19 is against a
- Fig. 2 shows a schematic perspective view of the on-load tap-changer 1 according to Fig. 1 in a closed circuit. This is due to the fact that the spindle 19 is in the direction of the axis A in comparison to FIG. 1 at the level of the plane E. Ie. the movable contact 17 is mechanically coupled to the lower plunger 39 of the vacuum interrupter 3 (see Fig. 4). Thus, the circuit is closed and current flows.
- FIG. 3 shows a side view of a diverter switch 5 of the on-load tap-changer 1 according to the invention (see Fig. 1) in an open circuit, wherein a compression spring 37 is arranged between a spindle 19 and the movable contact 17.
- the compression spring 37 is provided so that the movable contact 17 is mechanically biased in the direction of the axis A of the diverter switch 5 and an electrical erosion is avoided.
- the electrical contact 17 is formed from an upper plunger 37 and further components (not shown) for electrical transmission. A more detailed description of the electrical contact 17 has been omitted due to designs known in the art.
- FIG. 3 also shows that a lower plunger 39 is formed in each vacuum switch tube 3.
- the movable contact 17 is spaced from the lower plunger 39 of the vacuum interrupter 3, the circuit is open.
- Fig. 4 shows a side view of the diverter switch 5 of FIG. 3 in a closed circuit, since the movable contact 17 with the lower plunger 39 of the vacuum interrupter 3 is mechanically coupled.
- electricity flows.
- a contact erosion change of the Axialweges that covers each movable contact 17 in its initiated by the spindle 19 force flow axial movement is in a bearing unit 41 for supporting the movable contact 17, an axial play 43 between the bearing unit 41 and the movable contact 17 provided.
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Transmission Devices (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210202327 DE102012202327B4 (en) | 2012-02-16 | 2012-02-16 | On-load tap-changer with at least two vacuum interrupters and drive for a diverter switch with at least two vacuum interrupters |
PCT/EP2013/050608 WO2013120641A1 (en) | 2012-02-16 | 2013-01-15 | On-load tap changer having at least two vacuum interrupters, and drive for a load changeover switch having at least two vacuum interrupters |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2815413A1 true EP2815413A1 (en) | 2014-12-24 |
EP2815413B1 EP2815413B1 (en) | 2015-10-07 |
Family
ID=47563502
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13700559.1A Not-in-force EP2815413B1 (en) | 2012-02-16 | 2013-01-15 | On-load tap changer having at least two vacuum interrupters, and drive for a load changeover switch having at least two vacuum interrupters |
Country Status (6)
Country | Link |
---|---|
US (1) | US20150008104A1 (en) |
EP (1) | EP2815413B1 (en) |
CN (1) | CN104205273A (en) |
DE (1) | DE102012202327B4 (en) |
HK (1) | HK1201635A1 (en) |
WO (1) | WO2013120641A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106847609A (en) * | 2017-02-10 | 2017-06-13 | 山东民生电气设备有限公司 | A kind of miniaturization for on-load voltage regulating switch switches switch module |
DE102018105097A1 (en) * | 2018-03-06 | 2019-09-12 | Maschinenfabrik Reinhausen Gmbh | LASTSTUFENSCHALTER AND LOCAL TRANSFORMER WITH A LASTSTUFENSCHALTER |
EP3989251B1 (en) | 2020-10-21 | 2023-06-28 | Hitachi Energy Switzerland AG | Switching system for an on-load tap changer, on-load tap changer and method for switching a tap connection of an on-load tap changer |
EP3989253A1 (en) * | 2020-10-26 | 2022-04-27 | Hitachi Energy Switzerland AG | System for controlling a vacuum interrupter for a power diverter switch, a power diverter switch and an on-load tap changer |
CN113113245B (en) * | 2021-03-01 | 2023-12-12 | 北京航天控制仪器研究所 | Split type on-load tap-changer |
EP4084032A1 (en) * | 2021-04-28 | 2022-11-02 | Hitachi Energy Switzerland AG | Vacuum interrupter assembly for a power diverter switch, power diverter switch for a transformer load tap changer and transformer load tap changer |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB673804A (en) * | 1950-12-11 | 1952-06-11 | Asea Ab | Improvements in or relating to on-load tap changers for transformers |
US3396248A (en) * | 1966-12-12 | 1968-08-06 | Mc Graw Edison Co | Tap changer |
JPS5595308A (en) * | 1979-01-12 | 1980-07-19 | Fuji Electric Co Ltd | On-load tap changer |
JPH0821507B2 (en) * | 1988-08-26 | 1996-03-04 | 愛知電機株式会社 | Accumulation mechanism of tap changer under load |
DE4011019C1 (en) * | 1990-04-05 | 1991-12-05 | Maschinenfabrik Reinhausen Gmbh, 8400 Regensburg, De | |
DE4231353C2 (en) * | 1991-09-19 | 1997-07-24 | Toshiba Kawasaki Kk | Tap changer |
RO112973B1 (en) * | 1992-07-16 | 1998-02-27 | Reinhausen Maschf Scheubeck | Step switch |
US5594223A (en) * | 1993-12-07 | 1997-01-14 | Fuji Electric Co., Ltd. | Vacuum switch bulb type change over switch for on-load tap changer |
DE19510809C1 (en) * | 1995-03-24 | 1996-07-04 | Reinhausen Maschf Scheubeck | Load switching device for stepping switch |
KR100814514B1 (en) * | 2006-01-27 | 2008-03-17 | 가부시끼가이샤 도시바 | On-load tap changer |
DE102009043171B4 (en) * | 2009-09-26 | 2014-11-20 | Maschinenfabrik Reinhausen Gmbh | Step switch with vacuum interrupters |
-
2012
- 2012-02-16 DE DE201210202327 patent/DE102012202327B4/en not_active Expired - Fee Related
-
2013
- 2013-01-15 CN CN201380015910.0A patent/CN104205273A/en active Pending
- 2013-01-15 US US14/373,411 patent/US20150008104A1/en not_active Abandoned
- 2013-01-15 WO PCT/EP2013/050608 patent/WO2013120641A1/en active Application Filing
- 2013-01-15 EP EP13700559.1A patent/EP2815413B1/en not_active Not-in-force
-
2015
- 2015-02-27 HK HK15102012.3A patent/HK1201635A1/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2013120641A1 * |
Also Published As
Publication number | Publication date |
---|---|
HK1201635A1 (en) | 2015-09-04 |
US20150008104A1 (en) | 2015-01-08 |
DE102012202327A1 (en) | 2013-08-22 |
CN104205273A (en) | 2014-12-10 |
DE102012202327B4 (en) | 2015-01-08 |
WO2013120641A1 (en) | 2013-08-22 |
EP2815413B1 (en) | 2015-10-07 |
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