EP4374400A1 - Commutateur de charge pour un changeur de prises en charge et procédé de fabrication d'un commutateur de charge - Google Patents

Commutateur de charge pour un changeur de prises en charge et procédé de fabrication d'un commutateur de charge

Info

Publication number
EP4374400A1
EP4374400A1 EP22747273.5A EP22747273A EP4374400A1 EP 4374400 A1 EP4374400 A1 EP 4374400A1 EP 22747273 A EP22747273 A EP 22747273A EP 4374400 A1 EP4374400 A1 EP 4374400A1
Authority
EP
European Patent Office
Prior art keywords
carrier
housing
diverter switch
elements
load
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
EP22747273.5A
Other languages
German (de)
English (en)
Inventor
Christian Hammer
Wolfgang Albrecht
Michael Schmeisser
Christian Kotz
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 EP4374400A1 publication Critical patent/EP4374400A1/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
    • H01H9/0005—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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/321—Insulating of coils, windings, or parts thereof using a fluid for insulating purposes only
    • 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
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H2009/0285—Casings overmoulded over assembled switch or relay
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/023—Details concerning sealing, e.g. sealing casing with resin
    • 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
    • H01H9/02—Bases, casings, or covers
    • H01H9/0271—Bases, casings, or covers structurally combining a switch and an electronic component
    • 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
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H01H9/167—Circuits for remote indication

Definitions

  • the invention relates to a diverter switch for an on-load tap changer and a method for producing such a diverter switch.
  • On-load tap changers are known from the prior art and usually have a diverter switch and a selector.
  • the diverter switch has vacuum interrupters that are arranged in a vessel filled with insulating oil.
  • the vacuum interrupters are arranged in a frame around an actuating mechanism.
  • semiconductor switching elements as an alternative switching device for vacuum interrupters poses new challenges for the design and assembly of diverter switches.
  • a further object of the invention is to provide a method for manufacturing a diverter switch which is quick, simple and precise.
  • the invention proposes a diverter switch for an on-load tap changer, comprising:
  • a housing a carrier having elements for performing load switching; wherein the carrier with the elements are at least partially cast into the housing.
  • the carrier By potting the carrier with the elements used to perform a diverter switch in the body of the diverter switch, they are protected from the insulating oil. Chemical reactions between the elements and the insulating oil are prevented. The elements and thus the entire diverter switch therefore have a much longer service life. Furthermore, the elements are protected by the encapsulation against vibrations and other mechanical loads from the outside. Potting also increases the insulation distances between the individual elements. Flashovers are avoided, while the operating voltage level can be increased at the same time.
  • at least partially cast or encapsulated is understood to mean that the majority of the carrier and the elements are enclosed by a cast resin or silicone.
  • the housing can be designed in any way, in particular in the shape of a kettle or cup.
  • the housing can have a first area in which the carrier is arranged.
  • the first area is preferably so large that the carrier can be arranged at least partially or completely in the first area.
  • the housing encloses the carrier at least partially or completely.
  • the carrier is preferably in the form of a circuit board, printed circuit board or printed circuit board.
  • the carrier and the elements for carrying out a load changeover are preferably at least partially cast or encapsulated in the carrier with a casting resin or a silica gel.
  • the casting resin is preferably a polyurethane casting resin or epoxy resin.
  • the silicone rubber is preferably in the form of silicone rubber, which becomes a silicone gel after it has hardened.
  • the diverter switch can also include semiconductor switching elements and/or varistors and/or controllers and/or resistors and/or capacitors and/or MOSFETs and/or control units and/or transformers and/or rectifiers and/or current sensors, which are used as elements for performing a diverter switch be used.
  • the carrier can also include an optical communication interface and electrical contacts that are at least partially cast or encapsulated.
  • the optical communication interface and the electrical contacts are preferably encapsulated at the interfaces to the controller or to the selector only to the extent that these parts can be contacted.
  • the carrier can also have a further communication interface that uses Bluetooth, WLAN or radio, which is at least partially embedded or encapsulated.
  • the further communication interface is preferably cast at the interfaces to the controller or to the selector only to the extent that contacting these parts or communication with these parts is possible.
  • the diverter switch is preferably connected to a controller and a selector via the optical communication interface and the electrical contacts.
  • the diverter switch can also be connected to the controller and the selector via the additional communication interface, ie Bluetooth, WLAN or radio, and the electrical contacts.
  • the Diverter switch, the selector, the controller and a motor drive form an on-load tap changer.
  • the on-load tap changer is arranged in the transformer housing of a step transformer.
  • the invention proposes a method for producing a diverter switch, wherein: in a first step, the carrier with elements for performing a diverter switch is placed or arranged in a first region of the housing; in a second step, the carrier is cast at least partially in the first area and is thus connected to the housing; in a third step, the housing with the encapsulated carrier is dried.
  • the encapsulation or casting is preferably carried out with a casting resin or a Silgel, with the support being at least partially cast or encapsulated.
  • the casting resin is preferably a polyurethane casting resin or epoxy resin.
  • the silicone rubber is preferably in the form of silicone rubber, which becomes a silicone gel after it has hardened.
  • FIG. 3 shows a schematic sectional view of the diverter switch according to the invention.
  • FIG. 1 shows an on-load tap changer 1 with a load changeover switch 2 and a selector 3 which are arranged in a tapped transformer 6 .
  • the on-load tap changer 1 has a motor drive 4 and a controller 5 .
  • the controller 5 is arranged outside of the transformer housing 6.1.
  • the tapped transformer 6 is filled with an insulating agent 7, such as an insulating oil, which surrounds those parts of the on-load tap changer 1 that are arranged within the transformer 6.
  • the selector 3 uses its selector contacts to select a winding tap of the tapped transformer 6 that is to be exposed to sound.
  • the load changeover switch 2 performs the actual switching under load, in which switching takes place from a current winding tap to the preselected winding tap.
  • the controller 5 controls the entire switchover in such a way that it is transferred to the motor drive 4 and thus the voter 3 acts. Furthermore, the controller 5 acts on the diverter switch 2 and its elements 32, which are necessary for carrying out a diverter switch.
  • Figure 2a, Figure 2b and Figure 3 show that the diverter switch 2 has a housing 21 which is designed in the shape of a kettle.
  • a first area 23 is formed on a first side 22 of the bowl-shaped housing 21, in which a carrier 24 is arranged.
  • the carrier 24 is preferably designed as a circuit board.
  • the first area 23 has a floor 25 and a circular wall 26 surrounding the floor 25 .
  • the carrier 24 is preferably completely enclosed by the first area 23 or the carrier 24 is preferably located completely, but at least partially, within the first area.
  • the carrier 24 is mechanically fixed in the housing 21 at defined points.
  • the carrier 24 is encapsulated or cast in the first region 23 by means of a casting resin 30 or a silgel 31 .
  • the casting resin 30 can be in the form of an epoxy resin or a polyurethane casting resin.
  • the polyurethane resin preferably consists of a triisocyanate-diisocyanate mixture and a triol-diol mixture.
  • the mold resin 30 can also be configured as an epoxy resin, which is a synthetic resin having an epoxy group.
  • the diverter switch 2 is a switching device that is used with a selector 3 to switch currents on and off in branches that have already been preselected by the selector 3 .
  • a diverter switch 2 is the part of an on-load tap changer 1 that performs the actual switchover from one winding tap to an adjacent winding tap under load. During this, the selector 3 rests in such a way that its selector arms or selector contacts do not move.
  • the elements 32 are located on or on the carrier 24, which carry out the load switching or are necessary or required for this.
  • These elements 32 are, for example, several semiconductor switching elements (IGBTs, TRIAC), varistors, resistors, capacitors, MOSFETs, control units, transformers, rectifiers, current sensors and controllers.
  • At least one optical communication interface 40 and electrical contacts 41 which are designed as flat plugs, are located on or on the carrier 24.
  • the optical communication interface 40 and the electrical contacts 41 are likewise at least partially embedded or encapsulated. These can directly adjoin the housing 21 or run through it.
  • the diverter switch 2 is connected to the controller 5 via the communication interface 40 .
  • the diverter switch 2 is electrically conductively connected to the selector 3 and its selector contacts via the contacts 41 .
  • the carrier 24 also has recesses 42 through which Air can escape when pouring. This prevents air pockets from forming between the carrier 24 and the housing 21 during the casting process.
  • the carrier 24 arranged in the bowl-shaped housing 21 rests at least partially on the floor 25 of the first area 23 . Furthermore, a plurality of webs 27 can be arranged on the floor 25, by means of which the carrier 24 can be fixed at a distance from the floor 25.
  • the base 25 also has a number of elevations 28 and depressions, which can also be used to support and fix the carrier 24 .
  • the carrier 24 can rest on the elevations 28 and/or depressions.
  • the carrier 24 and the elements 32 are preferably arranged below the outer wall edge 29 so that in the installed state they are preferably completely surrounded by the casting resin 30 or embedded in it.
  • the carrier 24 and the elements 32 on or on the carrier 24 are preferably completely cast in or enclosed by the casting resin 30 or Silgel 31 .
  • the housing 21 arranged in the insulating oil 7 of the transformer 6 and thus the carrier 24 and the elements 32 are protected from chemical reactions with the insulating oil 7 by the encapsulation.
  • a further advantage of the encapsulation is that possible contamination in the oil no longer shortens the insulating plugs and the insulating plugs are no longer weakened.
  • the optical communication interface 40 and the electrical contacts 41 are preferably encapsulated at the interfaces to the controller 5 or to the selector 3 only to the extent that these parts can always be contacted.
  • the method for manufacturing or assembling the diverter switch 2 is as follows.
  • the carrier 24 with the elements 32 for carrying out a load switching is placed or arranged in a first area 23 of the housing 21 .
  • the carrier 24 can be placed either on the bottom 25 of the housing 21 , on at least one elevation 28 or at least one web 27 .
  • the carrier can be secured or fixed and aligned in the housing 21 by screwing or a positive fit with a web 27 or the housing 21 .
  • the carrier 24 together with the elements 32 is preferably completely encapsulated. This is done by pouring in a casting resin 30 or a silgel 31 .
  • the diverter switch 2 is dried in a curing oven under predefined parameters. A specified time, temperature and humidity must be observed. When the casting resin 30 or the silicone 31 dries, a connection is created between the carrier 24 and the housing 21 on the one hand and the carrier 24 is protected from the insulating oil 7 on the other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

L'invention concerne un commutateur de charge (2) pour un changeur de prises en charge (1), comprenant : -un boîtier (21) ;-un support (24) avec des éléments (32) pour effectuer un changement de charge ; le support (24) et les éléments (32) étant au moins partiellement intégrés dans le boîtier (21).
EP22747273.5A 2021-08-09 2022-07-01 Commutateur de charge pour un changeur de prises en charge et procédé de fabrication d'un commutateur de charge Pending EP4374400A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021120622.7A DE102021120622B3 (de) 2021-08-09 2021-08-09 Lastumschalter für einen Laststufenschalter und ein Verfahren zur Herstellung eines Lastumschalters
PCT/EP2022/068262 WO2023016700A1 (fr) 2021-08-09 2022-07-01 Commutateur de charge pour un changeur de prises en charge et procédé de fabrication d'un commutateur de charge

Publications (1)

Publication Number Publication Date
EP4374400A1 true EP4374400A1 (fr) 2024-05-29

Family

ID=82701892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22747273.5A Pending EP4374400A1 (fr) 2021-08-09 2022-07-01 Commutateur de charge pour un changeur de prises en charge et procédé de fabrication d'un commutateur de charge

Country Status (5)

Country Link
EP (1) EP4374400A1 (fr)
CN (1) CN117730388A (fr)
AU (1) AU2022327591A1 (fr)
DE (1) DE102021120622B3 (fr)
WO (1) WO2023016700A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1396115A (fr) * 1964-05-22 1965-04-16 Ass Elect Ind Perfectionnements aux transformateurs à changement de prise de service
DE4216034C1 (de) * 1992-05-15 1993-12-09 Reinhausen Maschf Scheubeck Stufenschalter für einen vorzugsweise gießharzisolierten Stufentransformator
JPH0969603A (ja) 1995-09-01 1997-03-11 Mitsubishi Electric Corp 電力用半導体装置、その外装ケースとその製造方法
DE10123232A1 (de) 2001-05-12 2002-11-21 Infineon Technologies Ag Halbleitermodul
DE102009017197A1 (de) 2009-04-09 2010-10-14 Maschinenfabrik Reinhausen Gmbh Stufenschalter mit Halbleiter-Schaltelementen
DE102009035699A1 (de) 2009-07-30 2011-02-10 Maschinenfabrik Reinhausen Gmbh Anordnung eines Stufenschalters an einem Regeltransformator
DE102010008973B4 (de) 2010-02-24 2015-11-05 Maschinenfabrik Reinhausen Gmbh Stufenschalter des Hybridtyps mit Halbleiterschaltelementen
CN109616343B (zh) * 2018-12-21 2020-03-06 云南电网有限责任公司电力科学研究院 一种配电变压器的分接开关档位显示装置和方法

Also Published As

Publication number Publication date
DE102021120622B3 (de) 2022-09-29
WO2023016700A1 (fr) 2023-02-16
AU2022327591A1 (en) 2024-03-21
CN117730388A (zh) 2024-03-19

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