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EP4264650A1 - Module de commutation et changeur de prises en charge comprenant un module de commutation - Google Patents

Module de commutation et changeur de prises en charge comprenant un module de commutation

Info

Publication number
EP4264650A1
EP4264650A1 EP21830987.0A EP21830987A EP4264650A1 EP 4264650 A1 EP4264650 A1 EP 4264650A1 EP 21830987 A EP21830987 A EP 21830987A EP 4264650 A1 EP4264650 A1 EP 4264650A1
Authority
EP
European Patent Office
Prior art keywords
switching module
cassette
plate
switching
diverter switch
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
Application number
EP21830987.0A
Other languages
German (de)
English (en)
Inventor
Toni Hottner
Robert Hiltner
Sebastian Rehkopf
Max Weidinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Reinhausen GmbH
Scheubeck GmbH and Co
Original Assignee
Maschinenfabrik Reinhausen GmbH
Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Reinhausen GmbH, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen GmbH
Publication of EP4264650A1 publication Critical patent/EP4264650A1/fr
Pending legal-status Critical Current

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
    • H01H9/0044—Casings; Mountings; Disposition in transformer housing
    • 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
    • H01H9/08—Arrangements to facilitate replacement of a switch, e.g. cartridge housing

Definitions

  • the invention relates to a switching module for an on-load tap changer for uninterrupted switching between winding taps of a tapped transformer and an on-load tap changer with such a switching module.
  • On-load tap changers enable the transformation ratio of transformers to be changed under load and are well known from the prior art. They usually have a diverter switch and a selector.
  • the diverter switch is equipped with switching means, for example vacuum switching tubes, and transition resistors, which are arranged in a cylindrical vessel filled with oil.
  • the voter is usually located below the Lastumschal tervascular and builds up from a variety of rods arranged in a circle. Contacts are arranged in different levels on these rods, which serve as connections for a control winding. Inside the selector, two selector arms are attached to a switching column. These make contact with the contacts on the rods. Diverter switch and selector are connected to each other via a gear.
  • the motor-drive unit is located on the outside of the step-up transformer and is connected to the on-load tap-changer via a linkage.
  • the so-called load selector which differs in design from the on-load tap changers described in the previous paragraph but is also known, the select and switch functions are combined in one switch. This means that the selector and diverter switch are not spatially separated from each other, but are arranged in a common oil tank.
  • the diverter switch or the load selector can be removed from the oil compartment for repair or maintenance work to be carried out. This he follows from above via a cover of the transformer housing.
  • a switching module for an on-load tap changer for uninterrupted switching between winding taps of a tapped transformer is specified.
  • the switching module includes a selector unit for power-free pre-selection to a selected winding tap, a diverter switch unit for the actual diverter switch from the previous winding tap to the preselected winding tap and a plate on which the selector unit and the diverter switch unit are arranged.
  • the diverter switch unit is arranged on a separate cassette which is detachably connected to the plate.
  • the on-load tap-changer's diverter switch unit is an assembly that determines the switching capacity, i.e. the limited number of possible on-load tap-changer switching operations to be carried out, and is therefore particularly relevant to service. By arranging the switching means of the diverter switch on a separate, detachable unit, this can be easily replaced together with the switching means without having to carry out conversion or expansion measures on the tap changer.
  • the plate and the cassette can be designed in any way, example, as a plate-shaped injection molded part.
  • the plate and the cassette can be made of plastic, for example thermoplastic or glass-reinforced plastic, or any other electrically insulating material.
  • the diverter switch unit comprises at least one vacuum interrupter and/or at least one electronic power switching element and/or at least one mechanical switching element, which can be configured as a bridge switch, for example.
  • the power electronic switching means can be designed as IGBTs and/or thyristors, for example.
  • the bridge switch can be designed in any way, for example as a rotary switch, slide switch or toggle switch.
  • the bridge switch can be actuated by linear or rotational movement.
  • the selector unit can be designed in any way and can have, for example, one or more movable selector contacts.
  • a moveable selector contact can be designed in any way, for example as a contact finger that is moved radially.
  • the movable selector contacts can also be actuated in any desired manner, for example via a Geneva wheel or a gear wheel.
  • Wei terhin has the voter on several fixed contacts that can be connected to the winding taps of the stepped transformer. These can be arranged in any way on the plate, such that they can be contacted by the movable selector contact or multiple movable selector contacts.
  • the fixed contacts are arranged radially on the disk.
  • the cassette has a first side and a second side opposite to the first side.
  • the at least one vacuum interrupter and/or the at least one electronic switching element are arranged on the first side.
  • the at least one mechanical switching element is arranged on the second side.
  • the plate has a recess with an open side, which comprises guide means on at least two inner walls, via which at least two side walls of the cassette can be inserted into the recess, such that the cassette is secured in the inserted state and flush with the plate.
  • the guiding means can be designed in any way, for example as a groove in connection with a guide rail and/or rollers.
  • a handle is preferably provided on the cassette for inserting and removing the cassette.
  • the cassette can be fixed in the recess of the plate with suitable means. For example, this can be done with a bolt that can be pushed both through the cassette and through the plate and/or with a different locking mechanism.
  • the switching module has at least one electrical interface via which a first line, which is assigned to the cassette, and a second line, which is assigned to the plate, can be connected to one another. Assigned here specifically means remaining on the plate or on the cassette when the cassette is pulled out.
  • the electrical interface can be designed in any way.
  • the electrical interface is designed as a screw connection.
  • the electrical interface is designed as a contact system that includes a contact bridge, a first plug contact that is assigned to the cassette, and a second plug contact that is assigned to the plate.
  • the first plug contact is detachably connected to the contact bridge.
  • the first plug-in contact can be inserted and/or pushed into the contact bridge and the contact bridge is arranged on the plate.
  • the contact bridge can be designed in any way.
  • the contact bridge can consist of two fixed contacts, which are spaced apart and arranged opposite one another, such that the plug-in contacts can be inserted and/or pushed in between the fixed contacts.
  • the fixed contacts can be held in position by means of a guide pin, for example, and pressed together by means of spring force and against the plug-in contacts used, such that the fixed contacts are electrically bridged and electrically connected to one another.
  • an on-load tap changer for uninterrupted switching between winding taps of a stepped transformer is specified.
  • the on-load tap changer includes at least one switching module that is designed according to the first aspect of the improved concept.
  • the on-load tap changer has a second and third switching module for a second and third phase of the tapped transformer that is to be regulated, which switching module is designed according to the first aspect of the improved concept.
  • FIG. 1 shows an exemplary embodiment of an on-load tap changer in a schematic representation
  • FIG. 2 shows an exemplary embodiment of a switching module in a perspective representation according to the improved concept
  • FIG. 3 shows a detailed view of an exemplary embodiment of the switching module according to the improved concept
  • FIG. 4 shows a detailed view of an exemplary embodiment of the cassette of the switching module in a perspective representation according to the improved concept
  • FIG. 5 shows a further detailed view of the cassette from FIG. 4 according to the improved concept
  • FIG. 6 shows a detailed view of a further exemplary embodiment of the cassette of the switching module in a perspective representation according to the improved concept
  • FIG. 7 shows a further detailed view of the cassette from FIG. 6 according to the improved concept
  • FIG. 8 shows a further detailed view of the switching module according to the embodiment from FIGS. 6 and 7 according to the improved concept
  • FIG. 9 shows an exemplary embodiment of an on-load tap changer with a switching module in a perspective representation according to the improved concept.
  • an exemplary embodiment of an on-load tap changer 20 for a tapped transformer 1 is shown schematically.
  • the tapped transformer 1 has a main winding 2 and a control winding 3 with different winding taps Ni, Nj, N N which are switched on and off by the on-load tap changer 20 .
  • the on-load tap changer 20 includes a selector 30, which can contact the different winding taps Ni, ..., Nj, ..., N N of the control winding 3 by means of two movable selector contacts, and a diverter switch 40, which is the actual diverter switch the currently connected to the new, preselected winding tap performs. In the position of the diverter switch 40 shown in FIG.
  • FIG. 2 shows an exemplary embodiment of a switching module in a perspective representation according to the improved concept.
  • the switching module 10 includes a plate 50 made of a plastic, for example glass fiber reinforced plastic, or another electrically insulating material.
  • the plate 50 is either designed as a milled part or made by injection molding.
  • a selector unit 30 and a diverter switch unit 40 are arranged on the plate 50 .
  • Powerless fixed contacts 31 are preselected via the selector unit 30, which in turn are electrically connected to the tapped windings of the tapped transformer (not shown).
  • the load switch unit 40 is located on a separate cassette 60 which is inserted into a recess 51 of the plate 50 and is flush with the plate 50.
  • a drive unit 25 is arranged on the plate 50, essentially between the selector unit 30 and the diverter switch unit 40.
  • the drive unit 25 is rotatably connected to a drive shaft (not shown).
  • the drive shaft and thus also the drive unit 25 are driven by a motor drive (not shown).
  • FIG. 3 shows a detailed view of an exemplary embodiment of the switching module according to the improved concept.
  • the cartridge 60 is in the extracted state.
  • the cassette 60 can be inserted into the recess 51 of the plate 50 and pulled out by means of a handle 64 .
  • the plate 50 has means for guiding 53 on the inner walls 52 of the recess 51, which are designed here as a groove. In this way, the service-relevant switching means of the diverter switch unit 40 can be easily removed from the plate 50 via the cassette 60, replaced or repaired and set again.
  • FIGS. 4 and 5 each show a detailed view of an exemplary embodiment of the cassette of the switching module in a perspective representation according to the improved concept.
  • FIG. 4 shows the first side 61 of the cassette 60, on which a vacuum interrupter 41 is arranged
  • FIG. 5 shows the opposite second side 62 of the cassette 60, which carries a mechanical switching element 42 which is designed as a bridge switch that can be actuated linearly.
  • the cartridge 60 further includes a plurality of leads 11 extending partially through the cassette 60 from the first side 61 to the second side 62, and an interface 13 for electrical connection to each second lead (not shown) associated with the panel 50.
  • the electrical interfaces 13 are designed as screw connections. The screw connections are provided in close proximity to the cassette 60 to provide easy access to the electrical connections for service.
  • the cassette 60 also consists of a plastic, for example glass fiber reinforced plastic, or another electrically insulating material and is designed, for example, as a milled part or is produced by means of an injection molding process.
  • a guide rail 65 is provided on the side walls 63 of the cassette 60, which works with the groove 53 on the inner walls 52 of the recess 51 of the plate 50 (cf. FIG. 3).
  • FIGS. 6 and 7 each show a detailed view of a further exemplary embodiment of the cassette of the switching module in a perspective representation according to the improved concept. This embodiment is similar to the variant in FIGS. 4 and 5, which is why only the differences are discussed below.
  • the electrical interfaces 13 are designed as a contact system.
  • the lines 11 each have a plug contact 15 at one end.
  • This can be inserted into a contact bridge 14, which is shown in more detail in FIG.
  • a contact bridge 14 consists of two fixed contacts 17 which are spaced apart and arranged opposite one another.
  • the fixed contacts 17 are held in position with a guide pin 18.
  • the first plug contact 15, which is assigned to the first line 11 on the cassette 60, and a second plug contact 16, which is assigned to a second line 12 on the plate 50, are supplied inserted in the inserted state of the cassette 60 between the fixed contacts 17 of the contact bridge 14.
  • About springs 19, which are arranged between a stop 80 of the guide pin 18 and a fixed contact 17, the fixed contacts 17 are pressed against the plug contacts 15 and 16, so that the fixed contacts 17 are electrically bridged and connected to each other.
  • FIG. 9 shows an exemplary embodiment of an on-load tap changer, which has a switching module according to the improved concept, in a perspective view.
  • the on-load tap changer 20 is three-phase and has a total of three switching modules 10, each comprising a plate 50 and a cassette 60, each are designed according to the embodiments shown in Figures 2 to 8.
  • the plates 50 are arranged in a longitudinal direction L of the on-load tap changer 20 along a drive shaft 22 one above the other and spaced apart from one another and are held in this position by means of a support structure 23 .
  • the drive shaft 22 also extends along the longitudinal direction L of the on-load tap changer 20 and, by means of a motor drive 24, drives all three phases of the on-load tap changer 20 equally.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)

Abstract

L'invention concerne un module de commutation (10) pour un changeur de prises en charge (20) pour commuter entre des prises d'enroulement (N1, …NJ, …, NN) d'un transformateur à prises (1) sans interruption, comprenant : une unité de sélection (30) pour présélectionner sans courant une prise d'enroulement désignée (NJ) ; une unité de commutation de transfert de charge (40) pour transférer réellement une charge à partir de la prise d'enroulement précédente (NJ-1) à la prise d'enroulement présélectionnée (NJ) ; une plaque (50), sur laquelle l'unité de sélection (30) et l'unité de commutation de transfert de charge (40) sont disposées ; l'unité de commutation de transfert de charge (40) étant disposée sur une cartouche séparée (60), qui est reliée de façon amovible à la plaque (50).
EP21830987.0A 2021-01-07 2021-12-07 Module de commutation et changeur de prises en charge comprenant un module de commutation Pending EP4264650A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021100145.5A DE102021100145B3 (de) 2021-01-07 2021-01-07 Schaltmodul und laststufenschalter mit schaltmodul
PCT/EP2021/084479 WO2022148583A1 (fr) 2021-01-07 2021-12-07 Module de commutation et changeur de prises en charge comprenant un module de commutation

Publications (1)

Publication Number Publication Date
EP4264650A1 true EP4264650A1 (fr) 2023-10-25

Family

ID=79024878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21830987.0A Pending EP4264650A1 (fr) 2021-01-07 2021-12-07 Module de commutation et changeur de prises en charge comprenant un module de commutation

Country Status (4)

Country Link
EP (1) EP4264650A1 (fr)
CN (1) CN116783676A (fr)
DE (1) DE102021100145B3 (fr)
WO (1) WO2022148583A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9728327B2 (en) * 2012-11-13 2017-08-08 Shanghai Huaming Power Equipment Co., Ltd External on-load tap changer
DE102014102263B3 (de) * 2014-02-21 2015-04-23 Maschinenfabrik Reinhausen Gmbh Laststufenschalter mit einem Gehäuse und einem austauschbaren Schaltmodul
JP6282547B2 (ja) * 2014-07-15 2018-02-21 株式会社東芝 負荷時タップ切換装置
CN109411255B (zh) 2018-12-12 2024-08-02 浙江腾龙电器有限公司 一种单电阻单真空有载调容调压分接开关
CN111463038A (zh) 2019-01-22 2020-07-28 济南爱迪电气设备有限公司 一种配电变压器专用有载调压开关及有载调压配电变压器
CN110098081A (zh) 2019-05-28 2019-08-06 浙江腾龙电器有限公司 一种有载调压开关

Also Published As

Publication number Publication date
WO2022148583A1 (fr) 2022-07-14
CN116783676A (zh) 2023-09-19
DE102021100145B3 (de) 2022-04-07

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