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EP3794621B1 - Système de contact pour un combinateur de réglage en charge - Google Patents

Système de contact pour un combinateur de réglage en charge Download PDF

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Publication number
EP3794621B1
EP3794621B1 EP19724478.3A EP19724478A EP3794621B1 EP 3794621 B1 EP3794621 B1 EP 3794621B1 EP 19724478 A EP19724478 A EP 19724478A EP 3794621 B1 EP3794621 B1 EP 3794621B1
Authority
EP
European Patent Office
Prior art keywords
contact
load tap
fixed
additional
movable
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.)
Active
Application number
EP19724478.3A
Other languages
German (de)
English (en)
Other versions
EP3794621C0 (fr
EP3794621A1 (fr
Inventor
Emir HEJUB
Nikolaus Unterreiner
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
Priority to HRP20250601TT priority Critical patent/HRP20250601T1/hr
Publication of EP3794621A1 publication Critical patent/EP3794621A1/fr
Application granted granted Critical
Publication of EP3794621C0 publication Critical patent/EP3794621C0/fr
Publication of EP3794621B1 publication Critical patent/EP3794621B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H9/0016—Contact arrangements for tap changers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • 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
    • H01H3/44—Driving mechanisms, i.e. for transmitting driving force to the contacts using Geneva movement
    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H9/383—Arcing contact pivots relative to the movable contact assembly
    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H9/386—Arcing contact pivots relative to the fixed contact assembly

Definitions

  • the invention relates to an on-load tap-changer with a selector device and a contact system.
  • On-load tap-changers are used for uninterrupted switching between different winding taps of an inductive device, such as a transformer or a reactor.
  • a fundamental problem is the occurrence of arcing between the current-carrying contacts of the on-load tap-changer. Such arcing occurs when a closed contact pair opens while a current is flowing through the contact pair. This can be an intentional opening, namely when the current is to be switched off. On the other hand, the opening can also be unintentional, for example when external oscillations, vibrations or force impulses act on the on-load tap-changer, or when internal movements in the on-load tap-changer transmit force impulses to the contacts.
  • the contacts can be surrounded by an insulating fluid, for example, the insulating fluid of the on-load tap-changer.
  • the contacts can also be directly surrounded by the insulating fluid of the equipment. In both cases, arcing caused by combustion products leads to a deterioration in the quality of the insulating fluid, particularly increased electrical conductivity, and thus shortens the maintenance intervals or the service life of the on-load tap-changer or the equipment.
  • the arcs also lead to increased wear, particularly burn-off, of the contacts. This also shortens the maintenance intervals and the service life of the on-load tap-changer.
  • DE 17 65 467 B1 discloses a high-voltage switching device.
  • the device has fixed contacts and a movable contact bridge.
  • the fixed contacts comprise a A contact rod and a shielding element with a cap that partially encloses the contact rod.
  • the shielding element has a circular opening through which the contact rod protrudes from the inside of the shielding element to the outside. In a resting state, the contact rod is completely shielded by the shielding element and the cap.
  • the contact bridge performs a circular movement and, against the action of a spring, presses the cap into the cup-shaped shielding element and engages the contact rod to establish contact.
  • mechanical coupling includes, for example, detachable connections such as plugging, clamping or similar, as well as fixed connections such as gluing, soldering or similar.
  • the distance between the first and second regions is greater than or equal to the maximum contact distance between the movable contact and the fixed contact.
  • the additional contact is designed as a lamella or sheet metal strip, in particular a self-sprung one, which is fixedly connected to the movable contact and is pressed against the surface of the fixed contact during the steady state. During the interruption, the auxiliary contact slides along the fixed contact, maintaining electrical contact.
  • the auxiliary contact part is in direct contact with the fixed contact during the stationary state. Because the auxiliary contact and the movable contact are movable relative to each other, direct contact between the auxiliary contact and the fixed contact can be maintained even during the interruption, thus preventing arcing. This is especially true if the mass of the auxiliary contact is significantly smaller than that of the movable contact.
  • the part of the additional contact that is movable relative to the movable contact is preloaded against the fixed contact in the stationary state. This is a further way to ensure that indirect contact via the additional contact is maintained during an interruption and that no arcing occurs.
  • a mass of the additional contact is at least one order of magnitude, i.e. a factor of 10, smaller than a mass of the movable contact.
  • the movable contact consists at least partially of a solid metal, for example copper, or a solid metal alloy, in particular in order to ensure a low electrical resistance and a high current-carrying capacity.
  • the additional contact consists at least partially of a copper alloy, for example a bronze, in particular a beryllium bronze or beryllium copper, such as CuBe2, or a tin bronze, such as CuSn6.
  • a copper alloy for example a bronze, in particular a beryllium bronze or beryllium copper, such as CuBe2, or a tin bronze, such as CuSn6.
  • the electrical resistance requirement of the auxiliary contact is lower than that of the moving contact. This is due to the fact that the auxiliary contact only carries a current during the relatively short duration of the interruption, while the moving contact must carry the current permanently.
  • the additional contact is spring-mounted or mounted on the movable contact.
  • the additional contact is spring-mounted or mounted on a component of the contact system or of the on-load tap-changer, which moves with the movable contact.
  • the selector device comprises an insulating plate having a first side and a second side, the second side being opposite the first side.
  • the movable contact is arranged on the first side.
  • the contact system comprises a further movable contact arranged on the second side.
  • the further movable contact is configured to directly contact the fixed contact.
  • the movable contact and the further movable contact can both directly contact the same movable contact in the stationary state.
  • the selector device is configured to switch the movable contact from a further fixed contact of the contact system to the fixed contact and subsequently switch the further movable contact from the further fixed contact or from a further fixed contact to the fixed contact.
  • the fixed contact can be considered the first fixed contact, the further fixed contact as the second fixed contact, and the additional further fixed contact as the third fixed contact.
  • the selector device comprises a Geneva wheel which is rotatably mounted on the insulating plate about an axis, is arranged on the first side and carries the movable contact.
  • the additional contact is attached or mounted on the Geneva wheel in a resilient manner, for example by means of a spring.
  • the selector device comprises a further Geneva wheel which is rotatably mounted on the insulating plate about the axis or a further axis, is arranged on the second side and carries the further movable contact.
  • the on-load tap-changer is designed to switch the movable contact from the fixed contact to the other fixed contact of the contact system and/or vice versa without current.
  • a current can flow between the movable contact and the fixed contact. This applies accordingly to a further stationary state in which the movable contact directly contacts the other fixed contact.
  • the moving contact and the fixed contact are designed to carry high currents, but not necessarily to switch high currents.
  • Such contacts are typically optimized for their electrical resistance, not necessarily for their resistance to arcing. Therefore, the improved concept is particularly advantageous here.
  • an inductive device is also specified, for example, designed as a transformer, in particular a power transformer, or designed as a choke, wherein the device comprises an on-load tap-changer according to the improved concept.
  • the device comprises a tank for filling with an insulating medium, in particular with an insulating liquid, for example an insulating oil.
  • an insulating medium for example an insulating oil.
  • the on-load tap-changer itself can include an insulating container for filling with an insulating material.
  • the moving contact and the fixed contact are in direct contact with the insulating material of the on-load tap-changer.
  • Figures 1A and 1B show a schematic representation of an exemplary embodiment of a contact system for an on-load tap-changer according to the improved system.
  • the contact system comprises a fixed contact FK, which does not move during a switching operation of the on-load tap-changer, and a movable contact BK.
  • the contact system comprises an additional contact ZK, which is formed, for example, as a sheet metal strip, in particular made of a copper alloy.
  • the additional contact ZK is, for example, firmly connected to the movable contact BK, in particular on an outer side of the movable contact BK.
  • the additional contact ZK contacts the fixed contact FK.
  • the additional contact ZK which can be self-resilient, for example, is pressed onto the fixed contact FK.
  • Figure 1B shows a situation involving the same contact system, where an interruption has occurred between the moving contact BK and the fixed contact FK.
  • the moving contact BK has moved away from the fixed contact FK by a contact distance KA in the opposite direction to the contact force KK, for example, due to impulse transmission caused by internal and/or external mechanical influences. Due to the current flow in the steady state, an arc would therefore form between the moving contact BK and the fixed contact FK if the additional contact ZK were not present.
  • Figure 2 shows a section of an exemplary voter device, or voter for short, with a contact system according to the improved concept.
  • Figure 3A shows part of the contact system in side view
  • Figure 3B shows a corresponding top view.
  • the selector comprises a first Maltese wheel M1 and a second Maltese wheel M2, which are opposite sides of an insulating plate (not shown for reasons of better visualization).
  • the selector comprises a fixed contact F1 and further fixed contacts, two of which are shown as examples: F2, F3.
  • the first Geneva wheel M1 carries a first movable contact B1
  • the second Geneva wheel M2 carries a second movable contact B2.
  • both movable contacts B1, B2 contact the fixed contact F1.
  • the movable contacts B1, B2 are each spring-mounted on the corresponding Geneva wheel, for example by a compression spring F, in order to exert a contact force KK from the movable contacts B1, B2 onto the fixed contact F1.
  • the first additional contact Z1 is, for example, self-sprung; in particular, at least a portion of the front side of the first additional contact Z1 is elastically deformable parallel to the contact force KK. As a result, in the stationary state, an additional contact force parallel to the contact force KK is exerted by the first additional contact Z1 on the fixed contact F1. Furthermore, the mass of the first additional contact Z1 is significantly lower, for example, at least by a factor of 10, than the mass of the first movable contact B1.
  • the contact system comprises a second additional contact Z2, which is arranged with respect to the second movable contact B2 in the same way as the first additional contact Z1 is arranged with respect to the first movable contact B1.
  • the above statements regarding the first movable contact B1 and the first additional contact Z1 then apply accordingly.
  • the selector is designed to actuate the Geneva wheels M1, M2 via a drive of the on-load tap-changer, in particular a drive shaft.
  • This actuation takes place, for example, in such a way that during a changeover, the first movable contact B1 is initially switched from one of the other fixed contacts F2, F3 to the fixed contact F1 without current. is switched. Then, in the stationary state, the current can flow between the fixed contact F1 and the first movable contact B1.
  • the second movable contact B2 is then also switched, for example, by one of the other fixed contacts F2, F3 to the fixed contact F1.
  • the various designs of a contact system, selector device, or on-load tap-changer can reduce arcing in an on-load tap-changer. This can reduce wear on the contact system due to contact erosion. It also reduces contamination of the insulating fluid of the on-load tap-changer and/or equipment. This extends the maintenance intervals of the on-load tap-changer and/or equipment, and their corresponding service lives.
  • the on-load tap-changer can also be used under external shock loads.

Landscapes

  • Contacts (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Claims (13)

  1. Changeur de prises en charge caractérisé par un dispositif de sélection qui comprend un système de contact, le système de
    - comprend un contact fixe (FK, F1) et un contact mobile (BK, B1, B2) qui sont adaptés pour entrer directement en contact avec le contact fixe (FK, F1) dans un état stationnaire ; et
    - comprend un contact auxiliaire (ZK, Z1, Z2) qui, en plus de la mise en contact directe, relie électriquement le contact mobile (BK, B1, B2) au contact fixe (FK, F1) pendant l'état stationnaire et ;
    - le contact supplémentaire (ZK, Z1, Z2) est conçu et disposé pour conduire brièvement un courant entre le contact fixe (FK, F1) et le contact mobile (BK, B1, B2) en cas d'interruption, lors de laquelle le contact direct entre le contact mobile (BK, B1, B2) et le contact fixe (FK, F1) est temporairement interrompu et est rétabli immédiatement après l'interruption.
  2. Changeur de prises en charge selon la revendication 1, dans lequel le contact auxiliaire (ZK, Z1, Z2)
    - est couplé mécaniquement au contact mobile (BK, B1, B2) de telle sorte qu'il se déplace avec le contact mobile (BK, B1, B2) ; ou
    - est couplé mécaniquement au contact fixe (FK, F1).
  3. Changeur de prises en charge selon l'une des revendications 1 ou 2, dans lequel, à l'état stationnaire
    - le contact mobile (BK, B1, B2) entre en contact avec le contact fixe (FK, F1) au niveau d'une première zone (B1) ;
    - le contact auxiliaire (ZK, Z1, Z2) entre en contact avec le contact fixe (FK, F1) au niveau d'une deuxième zone (B2) ; et
    - la première et la deuxième zone (B1, B2) ont une distance (A) l'une de l'autre qui est supérieure ou égale à une distance minimale prédéterminée.
  4. Changeur de prises en charge selon l'une des revendications 1 ou 2, dans lequel, à l'état stationnaire
    - une force de contact (KK) est exercée par le contact mobile (BK, B1, B2) sur le contact fixe (FK, F1) ;
    - une autre force de contact parallèle à la force de contact (KK) est exercée par le contact auxiliaire (ZK, Z1, Z2) sur le contact fixe (FK, F1) ; et
    - au moins une partie du contact auxiliaire (ZK, Z1, Z2) et le contact mobile (BK, B1, B2) sont mobiles l'un par rapport à l'autre dans la direction de la force de contact (KK).
  5. Changeur de prises en charge selon l'une des revendications 1 à 4, dans lequel une masse du contact auxiliaire (ZK, Z1 , Z2) est inférieure d'au moins un ordre de grandeur à une masse du contact mobile (BK, B1 , B2).
  6. Changeur de prises en charge selon l'une des revendications 1 à 5, dans lequel
    - le contact supplémentaire (ZK, Z1, Z2) est conçu avec un ressort propre ; ou
    - est fixé ou monté de manière élastique sur le contact mobile (BK, B1, B2) ; ou
    - est fixé ou logé de manière élastique sur un composant (M1, M2) du système de contact qui se déplace avec le contact mobile (BK, B1, B2).
  7. Changeur de prises en charge selon l'une des revendications 1 à 6, dans lequel l'interruption correspond à l'apparition d'une distance entre le contact mobile (BK, B1 , B2) et le contact fixe (FK, F1 ).
  8. Changeur de prises en charge selon l'une quelconque des revendications 1 à 7, dans lequel le contact auxiliaire (ZK, Z1 , Z2) comprend un bronze au béryllium ou un bronze à l'étain.
  9. Changeur de prises en charge selon l'une quelconque des revendications 1 à 8, dans lequel le dispositif sélecteur comprend une plaque isolante ayant une première face et une deuxième face opposée aux premières faces ;
    - le contact mobile (B1) est disposé sur le premier côté,
    - le système de contact comprend un autre contact mobile (B2) qui est disposé sur le deuxième côté ; et
    - l'autre contact mobile (B2) est conçu pour entrer directement en contact avec le contact fixe (F1).
  10. Changeur de prises en charge selon l'une des revendications 1 à 9, dans lequel le dispositif de sélection est adapté pour commuter le contact mobile (B1) d'un autre contact fixe (F2, F3) du système de contact sur le contact fixe (F1) et ensuite pour commuter l'autre contact mobile (B2) de l'autre contact fixe (F2, F3) ou d'un autre contact fixe supplémentaire (F2, F3) sur le contact fixe (F1).
  11. Changeur de prises en charge selon l'une des revendications 9 ou 10, comprenant une roue de Malte (M1) montée rotative autour d'un axe sur la plaque isolante et portant le contact mobile (B1).
  12. Changeur de prises en charge selon l'une des revendications 1 à 11, dans lequel le changeur de prises en charge est configuré pour commuter sans courant le contact mobile (BK, B1 , B2) du contact fixe (FK, F1 ) à un autre contact fixe (F2, F3) du système de contact.
  13. Equipement inductif comprenant un changeur de prises en charge selon l'une des revendications 1 à 12 et un réservoir destiné à être rempli d'un agent isolant, dans lequel le contact mobile (BK, B1, B2) et le contact fixe (FK, F1, F2, F3) sont en contact direct avec l'agent isolant lorsque le réservoir est rempli de l'agent isolant.
EP19724478.3A 2018-05-18 2019-05-15 Système de contact pour un combinateur de réglage en charge Active EP3794621B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
HRP20250601TT HRP20250601T1 (hr) 2018-05-18 2019-05-15 Kontaktni sustav za prekidač napona pod opterećenjem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018112013.3A DE102018112013A1 (de) 2018-05-18 2018-05-18 Kontaktsystem für einen laststufenschalter
PCT/EP2019/062487 WO2019219750A1 (fr) 2018-05-18 2019-05-15 Système de contact pour un combinateur de réglage en charge

Publications (3)

Publication Number Publication Date
EP3794621A1 EP3794621A1 (fr) 2021-03-24
EP3794621C0 EP3794621C0 (fr) 2025-03-12
EP3794621B1 true EP3794621B1 (fr) 2025-03-12

Family

ID=66554419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19724478.3A Active EP3794621B1 (fr) 2018-05-18 2019-05-15 Système de contact pour un combinateur de réglage en charge

Country Status (9)

Country Link
US (1) US11488789B2 (fr)
EP (1) EP3794621B1 (fr)
CN (1) CN112154526B (fr)
AU (1) AU2019270327B2 (fr)
DE (1) DE102018112013A1 (fr)
ES (1) ES3031474T3 (fr)
HR (1) HRP20250601T1 (fr)
MX (1) MX2020012324A (fr)
WO (1) WO2019219750A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020122450A1 (de) 2020-08-27 2022-03-03 Maschinenfabrik Reinhausen Gmbh Schaltmodul und Laststufenschalter mit Schaltmodul

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL135711C (fr) 1968-05-24
GB2135127B (en) * 1983-02-05 1986-04-30 Ferranti Plc Transformer tap-changer switch
SE448331B (sv) * 1985-06-14 1987-02-09 Ericsson Telefon Ab L M Jordning av skap
GB8800691D0 (en) * 1988-01-13 1988-02-10 Magneti Marelli Electrical Electromagnetic actuator
US5172088A (en) * 1992-02-06 1992-12-15 General Electric Company Molded case circuit breaker combined accessory actuator-reset lever
JP4834022B2 (ja) * 2007-03-27 2011-12-07 古河電気工業株式会社 可動接点部品用銀被覆材およびその製造方法
DE102014107273B4 (de) * 2014-05-23 2016-10-27 Maschinenfabrik Reinhausen Gmbh Schalter für eine Schaltvorrichtung und Lastumschalter für einen Laststufenschalter eines Stelltransformators
DE102016104499B3 (de) 2016-03-11 2017-04-27 Maschinenfabrik Reinhausen Gmbh Wähler für einen Laststufenschalter und Laststufenschalter mit Lastumschalter und Wähler

Also Published As

Publication number Publication date
CN112154526A (zh) 2020-12-29
HRP20250601T1 (hr) 2025-08-15
MX2020012324A (es) 2021-01-29
US11488789B2 (en) 2022-11-01
EP3794621C0 (fr) 2025-03-12
AU2019270327A1 (en) 2021-01-14
ES3031474T3 (en) 2025-07-09
US20210233721A1 (en) 2021-07-29
DE102018112013A1 (de) 2019-11-21
EP3794621A1 (fr) 2021-03-24
WO2019219750A1 (fr) 2019-11-21
CN112154526B (zh) 2025-08-15
AU2019270327B2 (en) 2024-09-12

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