DE3316866A1 - Contact arrangement for load selectors of stepping transformers - Google Patents

Contact arrangement for load selectors of stepping transformers

Info

Publication number
DE3316866A1
DE3316866A1 DE19833316866 DE3316866A DE3316866A1 DE 3316866 A1 DE3316866 A1 DE 3316866A1 DE 19833316866 DE19833316866 DE 19833316866 DE 3316866 A DE3316866 A DE 3316866A DE 3316866 A1 DE3316866 A1 DE 3316866A1
Authority
DE
Germany
Prior art keywords
contact
contact roller
load
contact piece
roller
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
Application number
DE19833316866
Other languages
German (de)
Other versions
DE3316866C2 (en
Inventor
Dieter Dr.-Ing. 8411 Lappersdorf Dohnal
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
Original Assignee
MASCHINENFABRIK REINHAUSEN Gebr SCHEUBECK GMBH & CO KG
Maschinenfabrik Reinhausen Gebr Scheubeck & Co Kg 8400 Regensburg 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 Gebr SCHEUBECK GMBH & CO KG, Maschinenfabrik Reinhausen Gebr Scheubeck & Co Kg 8400 Regensburg GmbH, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical MASCHINENFABRIK REINHAUSEN Gebr SCHEUBECK GMBH & CO KG
Priority to DE19833316866 priority Critical patent/DE3316866A1/en
Priority to SE8402326A priority patent/SE452222B/en
Priority to FR8406732A priority patent/FR2545643B1/en
Priority to BE1/11013A priority patent/BE899552A/en
Priority to JP8854384A priority patent/JPS59208709A/en
Publication of DE3316866A1 publication Critical patent/DE3316866A1/en
Application granted granted Critical
Publication of DE3316866C2 publication Critical patent/DE3316866C2/de
Granted 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
    • H01H9/0016—Contact arrangements for tap changers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/06—Contacts characterised by the shape or structure of the contact-making surface, e.g. grooved
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/16—Contacts characterised by the manner in which co-operating contacts engage by abutting by rolling; by wrapping; Roller or ball contacts

Landscapes

  • Contacts (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Measuring Leads Or Probes (AREA)

Abstract

A contact arrangement consisting essentially of copper or of a copper alloy, for load selectors of stepping transformers, having at least one cylindrical contact roller which is guided in a moving contact carrier and can roll off along a predetermined rolling track on the essentially flat surface of a stationary contact piece. In this case, in the ex-works state, the surface of the stationary contact piece is provided with grooves which run obliquely with respect to the rolling track, and the surface of the cylindrical contact roller is provided with helical grooves. In this case, the contact roller is arranged such that the grooves cross one another when the contact roller rolls off on the surface of the contact piece.

Description

Maschinenfabrik Reinhausen 280Ma/GlMaschinenfabrik Reinhausen 280Ma / Gl

Gebrüder Scheubeck GmbH & Co KGGebrüder Scheubeck GmbH & Co KG

Kontaktanordnung für Lastwähler von StufentransformatorenContact arrangement for load selectors of step transformers

Die Erfindung bezieht sich auf eine Kontaktanordnung für Lastwähler von Stufentransformatoren, wie sie im Oberbegriff des Patentanspruches näher bezeichnet ist. Derartige Kontaktanordnungen sind bekannt: OE 29 10 161 C2, 5The invention relates to a contact arrangement for load selectors of step transformers as described in the preamble of the claim is specified. Such contact arrangements are known: OE 29 10 161 C2, 5

Bei Lastwählern für Stufentransformatoren wird verlangt, daß an den Kontakten der Lastwähler nur ganz geringe Übergangswiderstände auftreten dürfen. Dies ist erforderlich, da die Wicklung des Transformators, bevor letzterer das Herstellerwerk verläßt, in aller Regel bei kleinen Spannungen mit schiwachen Strömen durchgemessen wird, um charakteristische Kennwerte des Transformators zu ermitteln. Hier können nun durch die Übergangswiderstände der Kontakte des im Transformator einge- bauten Lastwählers gewisse Verfälschungen der Meßergebnisse auftreten, da die kleinen verwendeten Meßspannungen bzw. -ströme mitunter nicht ausreichen, um die an den Kontakten des Lastwählers stets vorhandenen Fremdschichten zu durchbrechen. Es ist also so, daß die extrem kleinen Übergangswiderstände an den Kontakten des Lastwählers nur für das elektrische Durchmessen der Wicklung des Transformators benötigt werden. Für den späteren Betrieb des Transformators sind dann die üblicherweise an den Schaltkontakten von Last-Wählern vorkommenden Übergangswiderstände - z.B. an Kupfer/Kupferkontakten - problemlos, da hier infolge der normalen Betriebsspannungen bzw. -ströme auch die an den Kontakten vorhandenen Fremdschichten durchbrochen werden.In the case of load selectors for step transformers, it is required that only very low transition resistances may occur at the contacts of the load selector. This is necessary because the winding of the transformer, before the latter leaves the factory, usually with small ones Voltages are measured with weak currents, to determine characteristic values of the transformer. Here, the transition resistance of the contacts of the transformer used in the transformer built the load selector certain falsifications of the measurement results occur because the small measuring voltages or currents used are sometimes not sufficient, in order to break through the foreign layers that are always present on the contacts of the load selector. So it is that the extremely small contact resistances at the contacts of the load selector only for electrical measurements the winding of the transformer are required. For the later operation of the transformer are then usually at the switching contacts of load selectors Occurring contact resistances - e.g. on copper / copper contacts - problem-free, as this is a result the normal operating voltages and currents also break through the foreign layers present on the contacts will.

Aufgabe der Erfindung ist es, die eingangs genannte Kontaktanordnung so zu verbessern, daß im fabrikneuen Zustand der Lastwähler, extrem kleine; Überganqswiderstände aufweist und daß somit ein elektrisches Durchmessen der Wicklung des Transformators mit kleinen Spannungen und kleinen Strömen ohne Schwierigkeiten durchgeführt werden kann. Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Pateritanspruches angegebenen Mittel gelöst.The object of the invention is to improve the contact arrangement mentioned above so that in the brand new State of the load selectors, extremely small; Transfer resistances has and that thus an electrical measurement of the winding of the transformer with small voltages and small currents without difficulty can be carried out. This task will according to the invention by the characterizing part of the paterite claim specified means resolved.

■ Der mit der Erfindung erzielte Vorteil liegt in erster Linie darin, daß ohne großen Aufwand - wie er z.B. durch ein Versilbern der Kontakte entstehen würde erreicht wird, daß die Kontakte des Lastwählers im fabrikneuen Zustand extrem kleine Übergangswiderstände aufweisen. Die sich beim Betätigen der Kontakte kreuzenden Riffelungen von Kontaktrolle und Kontaktstück führen zur Zerstörung der an der Oberfläche der Kontakte vorhandenen Fremdschicht, so daß beim Aufeinandertreffen der Kontakte an den Kreuzungspunkten der einzelnen Riffelungsbahnen rein metallische Übergänge stattfinden. Dies ist wie sich gezeigt hat - für das elektrische Durchmessen der Wicklung des Transformators ausreichend.The advantage achieved with the invention lies primarily in the fact that without great effort - as e.g. by a silver-plating of the contacts would be achieved that the contacts of the load selector show extremely low contact resistance when brand new. When you press the Corrugations of the contact roller and contact piece crossing contacts lead to the destruction of the Surface of the contacts existing foreign layer, so that when the contacts meet at the At the intersection of the individual corrugated tracks, purely metallic transitions take place. This is like has been shown - sufficient for the electrical diameter of the winding of the transformer.

Soweit sich nach der Messung an den Kontakten des Lastwählers wieder die üblichen Fremdschichten aufbauen, ist dies für den eigentlichen Betrieb von Transformator und Lastwähler ohne Belang. Auch ist es ohne Belang, wenn die Riffelung im späteren Betrieb schon nach wenigen Schaltungen des Lastwählers unter Last infolge des Abbrandes durch den Lichtbogen verschwunden ist.Insofar as the usual foreign layers build up again on the contacts of the load selector after the measurement, this is irrelevant for the actual operation of the transformer and load selector. Also is it is irrelevant if the corrugation in later operation after a few switchings of the load selector below Load has disappeared as a result of the burn-up caused by the arc.

Ein Ausführungsbeispiel der Erfindung ist in der zuge-5 hörigen Figur schema ti srh dargestellt. Die von nirifniAn embodiment of the invention is shown in FIG subordinate figure schema ti srh shown. Those of nirifni

-χ--χ-

beweglichen Kontaktträger 1 geführte zylindrische Kontaktrolle 2 ist längs einer vorgegebenen Bahn 6 an der im wesentlichen planen Oberfläche eines feststehenden Kontaktstückes 3 abrollbar. Die Oberfläche des feststehenden Kontaktes 3 weist hierbei eine im wesentlichen diagonal verlaufende Riffelung 4 auf. In analoger Weise besitzt die zylindrische Kontaktrolle 2 eine schraubenförmige Riffelung 5, wobei die Kontaktrolle 2 so angeordnet ist, daß sich beim Abrollvorgang die Riffelung 4 des Kontaktstückes und die. Riffelung 5 der Kontaktrolle kreuzen.movable contact carrier 1 guided cylindrical contact roller 2 can be rolled along a predetermined path 6 on the essentially planar surface of a stationary contact piece 3. The surface of the fixed Contact 3 here has a substantially diagonal running corrugation 4 on. In an analogous manner, the cylindrical contact roller 2 has a helical shape Corrugation 5, the contact roller 2 is arranged so that the corrugation 4 of the Contact piece and the. Cross corrugation 5 of the contact roller.

Claims (1)

PatentanspruchClaim Im wesentlichen aus Kupfer ode.r aus einer Kupferlegierung bestehende Kontaktanordnung für Lastwähler von Stufentransformatoren mit mindestens einer in einem beweglichen Kontaktträger geführten zylinderförmigen Kontaktrolle, die an der im wesentlichen planen OberflächeEssentially made of copper or a copper alloy existing contact arrangement for load selectors of step transformers with at least one movable in a Contact carrier guided cylindrical contact roller, those on the essentially flat surface eines feststehenden Kontaktstückes längs einer vorgegebenen Rollbahn abrollbar ist, dadurch gekennzeichnet, daß im fabrikneuen Zustand die Oberfläche des feststehenden Kontaktstückes (3) eine schräg zur Rollbahn (6)a fixed contact piece along a predetermined The runway can be rolled off, characterized in that in the brand new condition the surface of the stationary Contact piece (3) at an angle to the runway (6) verlaufende Riffelung (4) besitzt und daß die Oberfläche der Zylinderförmigen Kontaktrolle (2) eine schraubenförmige Riffelung (5) besitzt, wobei die Kontaktrolle so angeordnet ist, daß beim Abrollen der Kontaktrolle auf der Oberfläche des Kontaktstückes die Riffelungen (4, 5) einander kreuzen.extending corrugation (4) and that the surface of the cylindrical contact roller (2) is helical Has corrugation (5), the contact roller being arranged so that when the contact roller rolls off the corrugations (4, 5) cross each other on the surface of the contact piece.
DE19833316866 1983-05-07 1983-05-07 Contact arrangement for load selectors of stepping transformers Granted DE3316866A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE19833316866 DE3316866A1 (en) 1983-05-07 1983-05-07 Contact arrangement for load selectors of stepping transformers
SE8402326A SE452222B (en) 1983-05-07 1984-04-27 ESSENTIAL OF COPPER OR COPPER ALLOY EXISTING CONNECTOR FOR LOAD SELECTOR IN TRANSFORMERS WITH OUTLETS
FR8406732A FR2545643B1 (en) 1983-05-07 1984-04-27 CONTACT DEVICE FOR SELECTOR IN CHARGE OF SOCKET TRANSFORMERS
BE1/11013A BE899552A (en) 1983-05-07 1984-05-02 CONTACT DEVICE FOR SELECTOR IN CHARGE OF SOCKET TRANSFORMERS.
JP8854384A JPS59208709A (en) 1983-05-07 1984-05-04 Contacor for load tap selector of on-load tap changing transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833316866 DE3316866A1 (en) 1983-05-07 1983-05-07 Contact arrangement for load selectors of stepping transformers

Publications (2)

Publication Number Publication Date
DE3316866A1 true DE3316866A1 (en) 1984-11-08
DE3316866C2 DE3316866C2 (en) 1991-10-17

Family

ID=6198516

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19833316866 Granted DE3316866A1 (en) 1983-05-07 1983-05-07 Contact arrangement for load selectors of stepping transformers

Country Status (5)

Country Link
JP (1) JPS59208709A (en)
BE (1) BE899552A (en)
DE (1) DE3316866A1 (en)
FR (1) FR2545643B1 (en)
SE (1) SE452222B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE302383C (en) *
FR2437710A1 (en) * 1978-09-26 1980-04-25 Lorraine Carbone Grooved brushes for electrical machines - have grooves, pref. of triangular cross=section formed in rubbing face without intersecting periphery of brush to avoid chipping
DE2910161C2 (en) * 1979-03-15 1982-09-09 Maschinenfabrik Reinhausen Gebrueder Scheubeck Gmbh & Co Kg, 8400 Regensburg, De

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE302383C (en) *
FR2437710A1 (en) * 1978-09-26 1980-04-25 Lorraine Carbone Grooved brushes for electrical machines - have grooves, pref. of triangular cross=section formed in rubbing face without intersecting periphery of brush to avoid chipping
DE2910161C2 (en) * 1979-03-15 1982-09-09 Maschinenfabrik Reinhausen Gebrueder Scheubeck Gmbh & Co Kg, 8400 Regensburg, De

Also Published As

Publication number Publication date
JPH0374021B2 (en) 1991-11-25
SE452222B (en) 1987-11-16
JPS59208709A (en) 1984-11-27
SE8402326L (en) 1984-11-08
FR2545643B1 (en) 1989-01-20
DE3316866C2 (en) 1991-10-17
FR2545643A1 (en) 1984-11-09
SE8402326D0 (en) 1984-04-27
BE899552A (en) 1984-08-31

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Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: MASCHINENFABRIK REINHAUSEN GMBH, 8400 REGENSBURG,

8110 Request for examination paragraph 44
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee