EP0213461B1 - Step transformer with a centre tap - Google Patents

Step transformer with a centre tap Download PDF

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Publication number
EP0213461B1
EP0213461B1 EP86111042A EP86111042A EP0213461B1 EP 0213461 B1 EP0213461 B1 EP 0213461B1 EP 86111042 A EP86111042 A EP 86111042A EP 86111042 A EP86111042 A EP 86111042A EP 0213461 B1 EP0213461 B1 EP 0213461B1
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EP
European Patent Office
Prior art keywords
tap
contact
contacts
winding
lead
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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.)
Expired - Lifetime
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EP86111042A
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German (de)
French (fr)
Other versions
EP0213461A1 (en
Inventor
Karl Dipl.-Ing. Stenzel (Fh)
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Maschinenfabrik Reinhausen GmbH
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Maschinenfabrik Reinhausen GmbH
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Priority to AT86111042T priority Critical patent/ATE52875T1/en
Publication of EP0213461A1 publication Critical patent/EP0213461A1/en
Application granted granted Critical
Publication of EP0213461B1 publication Critical patent/EP0213461B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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

Definitions

  • the invention relates to a step transformer according to the preamble of claim 1.
  • Step transformers of this type are usually equipped with center changeovers, which can only be actuated when the transformer is switched off. To set the voltage, the transformer must therefore always be switched off.
  • transformers in which a voltage setting can be carried out under load i.e. transformers in which a voltage setting can be carried out under load.
  • the mere replacement of a transformer equipped with a diverter by a transformer that can be regulated under load is of course very complex. Therefore, efforts are being made to replace the existing diverter with a load selector in such transformers. In general, this does not cause too much difficulty for transformers with star point tapping.
  • modified load selectors of a conventional type can now be used to convert the step transformer with center tap. That it is no longer necessary to use two load selectors per phase or one two-pole load selector per phase. It is possible to provide the load selector on the transformer instead of the original diverter without major modifications. However, it is also possible to use a load selector of the attachment type.
  • Claim 2 specifies an expedient embodiment of the load selector to be used.
  • the step transformer has two winding parts W1, W2, which are provided with three taps 1, 2, 3 and 4, 5, 6 towards the center M.
  • the taps are each connected to a fixed step contact K1, K2, K3 or K4, K5, K6 of a load selector.
  • the step contacts K1 to K6 are arranged in a circle in the usual way.
  • the load selector has a movable contact system 10 which can be pivoted around the center of the circle from one to the next step contact.
  • the movable contact system has a main contact 11 and two resistance contacts 12 and a sliding contact 13, which is connected to a two-part ring-shaped discharge contact 14, 15.
  • the main contact 11 is connected directly to the sliding contact 13, while the resistance contacts 12 are each connected to the sliding contact 13 with the interposition of the transition resistors 16.
  • the annular discharge contact is in two parts, the first part 14 being assigned to the step contacts K1 to K3 and being electrically connected to the tap 4 of the winding part W2 lying away from the center, while the second part 15 of the discharge contact is connected to the step contacts K4, K5, K6 is assigned and is electrically connected to the tapping 3 of the first winding part W1 lying towards the center M.
  • the lowest voltage setting is present in the position shown in FIG. 1.
  • the current profile goes from tap 1 via the step contact K1, the main contact 11, the sliding contact 13, the discharge contact 14 to the tap 4.
  • the winding parts lying between the taps are therefore all removed.
  • the movable contact system 10 is moved from the step contact K1 to the step contact K2.
  • the two step contacts K1 and K2 are bridged briefly in the usual way, in that one of the resistance contacts 12 is still in contact with the step contact K1, while the other resistance contact 12 has already come into contact with the step contact K2 (see also FIG. 2).
  • the moving contact system 10 is changed from Step contact K3 to step contact K4.
  • the sliding contact 13 also changes from the diverter contact 14 to the diverter contact 15. If the current profile was initially from the tap 3 via the step contact K3 and the diverter contact 14 to the tap 4, the current profile is after the switching operation has been completed from the tap 3 via the diverter contact 15 and the tap contact K4 for tapping 4.
  • This switching step means no change in voltage on the tap transformer.
  • the movable contact system changes from step contact K4 to step contact K5, whereby the winding section between taps 4 and 5 is switched on with a further voltage increase.Finally, the movable contact system can be moved to step contact K6 for the highest voltage setting.
  • the sliding contact 13 changes simultaneously from the discharge contact 14 to the discharge contact 15, which is why the corresponding end pieces 17 of the discharge contacts 14 , 15 and the ends 18 of the sliding contact 13 are provided with erosion-resistant material.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Contacts (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

1. Tapped transformer, in which the winding of each phase is split in its centre and each winding part (W1, W2) is provided from this centre outwards with several taps (1 to 3, 4 to 6), which are switchable in and out in sequence by means of a selector switch, to the stationary tap contacts (K1 to K6) - arranged in a circle - of which the taps (1 to 6) are connected and the movable contacts (10) of which are pivotable from tap contact (K1 to K6) to tap contact (K1 to K6) about the center of the circle, characterised thereby, that the selector switch is a load diverter switch, which is operable under load and in which the taps (1, 2, 3 or 6, 5, 4) of both the winding parts (W1, W2) are connected in opposite sequence to the stationary contacts (K1, K2, K3 or K6, K5, K4) and in which the movable contacts (10) are constantly in engagement with an annular lead-out contact (14, 15), wherein the annular lead-out contact is subdivided into two parts (14, 15), the first part (14) of which is associated with the tap contacts (K1, K2, K3) of the first winding part (W1) and the second part (15) of which is associated with the tap contacts (K4, K5, K6) of the second winding part (W2), wherein the first part (14) of the lead-out contact is electrically connected with the last tap (4) - as seen from the centre (M) - of the second winding part (W2), while the second part (15) of the lead-out contact is connected with the first tap (3) - as seen from the centre - of the first winding part (W1), and wherein the movable contacts (10), simultaneously with their change from the tap contact (K3) of the first tap (3) of the first winding part (W1) to the tap contact (K4) of the last tap of the second winding part (W2), change without interruption from the first part (14) to the second part (15) of the lead-out contact.

Description

Die Erfindung bezieht sich auf einen Stufentransformator gemäß Oberbegriff des Patentanspruches 1.The invention relates to a step transformer according to the preamble of claim 1.

Derartige Stufentransformatoren sind üblicherweise mit Mittenumstellern ausgerüstet, die nur bei abgeschaltetem Transformator betätigt werden können. Zur Einstellung der Spannung muß deshalb der Transformator stets abgeschaltet werden. Im Zuge der Modernisierung elektrischer Versorgungsnetze, die zu einer größeren Energiedichte und zu einer stärkeren Vermaschung der Netze führt, besteht nun die Notwendigkeit, in den vorhandenen Netzen im verstärkten Maße Regeltransformatoren einzusetzen, also Tranformatoren, bei denen eine Spannungseinstellung unter Last vorgenommen werden kann. Der reine Austausch eines mit Umsteller ausgerüsteten Transformators durch einen unter Last regelbaren Transformator ist natürlich sehr aufwendig. Deshalb ist man bemüht, bei derartigen Transformatoren den vorhandenen Umsteller durch einen Lastwähler zu ersetzen. Bei Transformatoren mit Sternpunktanzapfung bereitet dies im allgemeinen keine zu großen Schwierigkeiten. Anders ist es jedoch bei Transformatoren mit Mittenanzapfung, weil hier jeweils pro Phase zwei verschiedene Anzapfungen miteinander zu verbinden sind. Dies führt dazu, daß pro Phase entweder zwei Lastwähler oder aber ein zweipoliger Lastwähler zum Einsatz gelangen müssen. Dies ist natürlich sehr aufwendig und scheitert auch oft daran, daß sich die Lastwähler schon rein räumlich nicht unterbringen lassen.Step transformers of this type are usually equipped with center changeovers, which can only be actuated when the transformer is switched off. To set the voltage, the transformer must therefore always be switched off. In the course of the modernization of electrical supply networks, which leads to greater energy density and greater meshing of the networks, there is now a need to increasingly use regulating transformers in the existing networks, i.e. transformers in which a voltage setting can be carried out under load. The mere replacement of a transformer equipped with a diverter by a transformer that can be regulated under load is of course very complex. Therefore, efforts are being made to replace the existing diverter with a load selector in such transformers. In general, this does not cause too much difficulty for transformers with star point tapping. It is different with transformers with center tapping, because here two different taps have to be connected to each other for each phase. This means that either two load selectors or a two-pole load selector must be used per phase. Of course, this is very complex and often fails because the load selector cannot be accommodated in purely spatial terms.

Es ist deshalb Aufgabe der Erfindung, die Möglichkeit für das Umrüsten speziell der mit Mittenumstellern ausgerüsteten Transformatoren sowohl bezüglich des Aufwandes wie auch bezüglich des Platzbedarfes erheblich zu verbessern. Diese Aufgabe wird bei den eingangs genannten Stufentransformatoren erfindungsgemäß durch die im Kennzeichen des Patentanspruches 1 angegebenen Mittel gelöst.It is therefore an object of the invention to significantly improve the possibility of converting the transformers equipped with center changeovers, both in terms of effort and in terms of space. This object is achieved according to the invention in the step transformers mentioned at the outset by the means specified in the characterizing part of patent claim 1.

Der entscheidende Vorteil der Erfindung ist, daß für die Umrüstung des Stufentransformators mit Mittenanzapfung nunmehr abgewandelte Lastwähler herkömmlicher Art Verwendung finden können. Daß es also nicht mehr erforderlich ist, pro Phase zwei Lastwähler bzw. pro Phase einen zweipoligen Lastwähler einzusetzen. Es ist möglich, den Lastwähler ohne größere Umbauten am Transformator anstelle der ursprünglichen Umstellers vorzusehen. Es ist aber auch möglich, einen Lastwähler des Anbautyps einzusetzen.The decisive advantage of the invention is that modified load selectors of a conventional type can now be used to convert the step transformer with center tap. That it is no longer necessary to use two load selectors per phase or one two-pole load selector per phase. It is possible to provide the load selector on the transformer instead of the original diverter without major modifications. However, it is also possible to use a load selector of the attachment type.

Anspruch 2 gibt eine zweckmäßige Ausgestaltung des zu verwendenden Lastwählers an.Claim 2 specifies an expedient embodiment of the load selector to be used.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung in schematischer Schaltanordnung dargestellt.An embodiment of the invention is shown in the drawing in a schematic circuit arrangement.

Es zeigen.

  • Figur 1 die Anordnung in Betriebsstellung auf Anzapfung 1 stehend (niedrigste Spannungseinstellung),
  • Figur 2 die Anordnung während des Umschaltvorganges von Anzapfung 3 nach Anzapfung 4.
Show it.
  • 1 shows the arrangement in the operating position on tap 1 (lowest voltage setting),
  • Figure 2 shows the arrangement during the switching process from tap 3 to tap 4th

Wie ersichtlich, besitzt der Stufentransformator zwei Wicklungsteile W1, W2, die zur Mitte M hin mit je drei Anzapfungen 1, 2, 3 bzw. 4, 5, 6 versehen sind. Die Anzapfungen sind an je einen feststehenden Stufenkontakt K1, K2, K3 bzw. K4, K5, K6 eines Lastwählers angeschlossen. Die Stufenkontakte K1 bis K6 sind auf übliche Weisse im Kreis angeordnet. Der Lastwähler besitzt ein bewegliches Kontaktsystem 10, welches um den Kreismittelpunkt von einem zum nächsten Stufenkontakt verschwenkbar ist. Das bewegliche Kontaktsystem besitzt dabei einen Hauptkontakt 11 sowie zwei Widerstandskontakte 12 und einen Schleifkontakt 13, der mit einem zweiteilig ausgebildeten ringförmigen Ableitkontakt 14, 15 in Verbindung steht. Hierbei ist der Hauptkontakt 11 unmittelbar mit dem Schleifkontakt 13 verbinden, während die Widerstandskontakte 12 jeweils unter Zwischenschaltung der Überschaltwiderstände 16 mit dem Scheifkontakt 13 verbunden sind. Der ringförmige Ableitkontakt ist-wie gesagt-zweiteilig, wobei der erste Teil 14 den Stufenkontakten K1 bis K3 zugeordnet und elektrisch mit der von der Mitte wegliegenden Anzapfung 4 des Wicklungsteiles W2 verbunden ist, während der zweite Teil 15 des Ableitkontaktes den Stufenkontakten K4, K5, K6 zugeordnet ist und mit zur Mitte M liegenden Anzapfung 3 des ersten Wicklungsteiles W1 elektrisch verbunden ist.As can be seen, the step transformer has two winding parts W1, W2, which are provided with three taps 1, 2, 3 and 4, 5, 6 towards the center M. The taps are each connected to a fixed step contact K1, K2, K3 or K4, K5, K6 of a load selector. The step contacts K1 to K6 are arranged in a circle in the usual way. The load selector has a movable contact system 10 which can be pivoted around the center of the circle from one to the next step contact. The movable contact system has a main contact 11 and two resistance contacts 12 and a sliding contact 13, which is connected to a two-part ring-shaped discharge contact 14, 15. Here, the main contact 11 is connected directly to the sliding contact 13, while the resistance contacts 12 are each connected to the sliding contact 13 with the interposition of the transition resistors 16. As already mentioned, the annular discharge contact is in two parts, the first part 14 being assigned to the step contacts K1 to K3 and being electrically connected to the tap 4 of the winding part W2 lying away from the center, while the second part 15 of the discharge contact is connected to the step contacts K4, K5, K6 is assigned and is electrically connected to the tapping 3 of the first winding part W1 lying towards the center M.

In der in Figur 1 gezeigten Stellung liegt die niedrigste Spannungseinstellung vor. Der Stromverlauf geht von Anzapfung 1 über den Stufenkontakt K1, den Hauptkontakt 11, den Schleifkontakt 13, den Ableitkontakt 14 zur Anzapfung 4. Die zwischen den Anzapfungen liegenden Wicklungsteile sind also alle herausgenommen. Zur Umschaltung zur nächst höheren Spannungsstufe wird das bewegliche Kontaktsystem 10 vom Stufenkontakt K1 zum Stufenkontakt K2 bewegt. Hierbei erfolgt auf übliche Art eine kurzzeitige Überbrückung der beiden Stufenkontakte K1 und K2, indem einer der Widerstandskontakt 12 noch am Stufenkontakt K1 anliegt, während der andere Widerstandkontakt 12 bereits am Stufenkontakt K2 zur Anlage gelangt ist (vergleiche auch Figur 2). Sobald das bewegliche Kontaktsystem 10 seine Betriebsstellung am Stufenkontakt K2 eingenommen hat, ist-wie ohne weiteres ersichtlich-der zwischen der Anzapfung 1 und der Anzapfung 2 befindliche Wicklungsteil zugeschaltet und die Spannung des Stufentransformators entsprechend erhöht. Beim Weiterschalten zum Stufenkontakt K3 wird der zwischen Anzapfung 2 und Anzapfung 3 liegende Wicklungsteil zur weiteren Spannungserhöhung zugeschaltet. Gemäß Figur 2 erfolgt der Wechsel des beweglichen Kontaktsystems 10 vom Stufenkontakt K3 zum Stufenkontakt K4. Mit diesem Wechsel wechselt auch der Schleifkontakt 13 vom Ableitkontakt 14 zum Ableitkontakt 15. War der Stromverlauf zunächst von der Anzapfung 3 über den Stufenkontakt K3 und den Ableitkontakt 14 zur Anzapfung 4, so ist der Stromverlauf nach vollendetem Umschaltvorgang von der Anzapfung 3 über den Ableitkontakt 15 und den Stufenkontakt K4 zur Anzapfung 4. Dieser Schaltschritt bedeutet keine Spannungsänderung am Stufentransformator. Beim nächsten Schaltschritt wechselt das bewegliche Kontaktsystem vom Stufenkontakt K4 zum Stufenkontakt K5, wodurch der zwischen Anzapfung 4 und 5 liegende Wicklungsteil mit weiterer Spannungserhöhung zugeschaltet wird, Schließlich kann zur höchsten Spannungseinstellung das bewegliche Kontaktsystem noch zum Stufenkontakt K6 bewegt werden.The lowest voltage setting is present in the position shown in FIG. 1. The current profile goes from tap 1 via the step contact K1, the main contact 11, the sliding contact 13, the discharge contact 14 to the tap 4. The winding parts lying between the taps are therefore all removed. To switch to the next higher voltage level, the movable contact system 10 is moved from the step contact K1 to the step contact K2. In this case, the two step contacts K1 and K2 are bridged briefly in the usual way, in that one of the resistance contacts 12 is still in contact with the step contact K1, while the other resistance contact 12 has already come into contact with the step contact K2 (see also FIG. 2). As soon as the movable contact system 10 has reached its operating position at the step contact K2, the winding part located between the tap 1 and the tap 2 is switched on, as is readily apparent, and the voltage of the step transformer is increased accordingly. When switching to step contact K3, the winding part lying between tap 2 and tap 3 is switched on for a further voltage increase. According to FIG. 2, the moving contact system 10 is changed from Step contact K3 to step contact K4. With this change, the sliding contact 13 also changes from the diverter contact 14 to the diverter contact 15. If the current profile was initially from the tap 3 via the step contact K3 and the diverter contact 14 to the tap 4, the current profile is after the switching operation has been completed from the tap 3 via the diverter contact 15 and the tap contact K4 for tapping 4. This switching step means no change in voltage on the tap transformer. In the next switching step, the movable contact system changes from step contact K4 to step contact K5, whereby the winding section between taps 4 and 5 is switched on with a further voltage increase.Finally, the movable contact system can be moved to step contact K6 for the highest voltage setting.

De beim Wechsel des beweglichen Kontaktsystems vom Stufenkontakt K3 zum Stufenkontakt K4 ein Teilstrom auch über die beiden Teile 14,15 des Ableitkontakts verläuft, erfolgt der gleichzeitige Wechsel des Schleifkontaktes 13 vom Ableitkontakt 14 zum Ableitkontakt 15 nicht stromlos, weshalb die entsprechenden Endstücke 17 der Ableitkontakte 14, 15 wie auch die Enden 18 des Schleifkontaktes 13 mit abbrandfestem Material versehen sind.Since, when the movable contact system changes from the step contact K3 to the step contact K4, a partial current also runs over the two parts 14, 15 of the discharge contact, the sliding contact 13 changes simultaneously from the discharge contact 14 to the discharge contact 15, which is why the corresponding end pieces 17 of the discharge contacts 14 , 15 and the ends 18 of the sliding contact 13 are provided with erosion-resistant material.

Es ist klar, daß in der schematischen Darstellung alle Kontakte in einer Ebene liegen, was in der praktischen Ausführung jedoch keineswegs der Fall sein muß. So können z.B. die Ableitkontakte 14, 15 in einer Ebene unterhalb oder oberhalb der im Kreis angeordneten feststehenden Stufenkontakt Kl-K6 liegen, und die beweglichen Kontakte können als Rollenbrücken ausgeführt werden. Auch ist die Anbcknung keineswegs auf die gezeigte Stufenzahl beschränkt.It is clear that in the schematic representation all contacts are in one plane, but this need not be the case in practice. For example, the discharge contacts 14, 15 lie in a plane below or above the fixed step contact Kl-K6 arranged in a circle, and the movable contacts can be designed as roller bridges. The initiation is by no means limited to the number of stages shown.

Claims (2)

1. Tapped transformer, in which the winding of each phase is split in its centre and each winding part (W1, W2) is provided from this centre outwards with several taps (1 to 3, 4 to 6), which are switchable in and out in sequence by means of a selector switch, to the stationary tap contacts (K1 to K6)-arranged in a circle-of which the taps (1 to 6) are connected and the movable contacts (10) of which are pivotable from tap contact (K1 to K6) to tap contact (K1 to K6) about the center of the circle, characterised thereby, that the selector switch is a load diverter switch, which is operable under load and in which the taps (1, 2, 3 or 6, 5, 4) of both the winding parts (W1, W2) are connected in opposite sequence to the stationary contacts (K1, K2, K3 or K6, K5, K4) and in which the movable contacts (10) are constantly in engagement with an annular lead-out contact (14, 15), wherein the annular lead-out contact is subdivided into two parts (14,15), the first part (14) of which is associated with the tap contacts (K1, K2, K3) of the first winding part (W1) and the second part (15) of which is associated with the tap contacts (K4, K5, K6) of the second winding part (W2), wherein the first part (14) of the lead-out contact is electrically connected with the last tap (4)-as seen from the centre (M)-of the second winding part (W2), while the second part (15) of the lead-out contact is connected with the first tap (3)-as seen from the centre-of the first winding part (W1), and wherein the movable contacts (10), simultaneously with their change from the tap contact (K3) of the first tap (3) of the first winding part (W1) to the tap contact (K4) of the last tap of the second winding part (W2), change without interruption from the first part (14) to the second part (15) of the lead-out contact.
2. Tapped transformer according to claim 1, characterised thereby, that both the ends (17) of both the parts of the lead-out contact (14, 15) are bridgeable over during the switch-over operation and, just as that part (13) of the movable contact system (10), which stands in engagement with them, are provided with contact material (17, 18) resistant to erosion.
EP86111042A 1985-08-21 1986-08-09 Step transformer with a centre tap Expired - Lifetime EP0213461B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86111042T ATE52875T1 (en) 1985-08-21 1986-08-09 CENTER-TAPED TAP TRANSFORMER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3529886 1985-08-21
DE19853529886 DE3529886A1 (en) 1985-08-21 1985-08-21 STAGE TRANSFORMER WITH CENTER TAP

Publications (2)

Publication Number Publication Date
EP0213461A1 EP0213461A1 (en) 1987-03-11
EP0213461B1 true EP0213461B1 (en) 1990-05-16

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ID=6279003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86111042A Expired - Lifetime EP0213461B1 (en) 1985-08-21 1986-08-09 Step transformer with a centre tap

Country Status (5)

Country Link
EP (1) EP0213461B1 (en)
JP (1) JPH0646615B2 (en)
CN (1) CN1010902B (en)
AT (1) ATE52875T1 (en)
DE (2) DE3529886A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013109289A1 (en) 2013-08-27 2015-03-05 Maschinenfabrik Reinhausen Gmbh On-load tap-changer, tap-changer for voltage regulation and method for carrying out a changeover in the tapped transformer
DE102014103526A1 (en) 2014-03-14 2015-09-17 Maschinenfabrik Reinhausen Gmbh On-load tap-changer, tap-changer for voltage regulation and method for carrying out a changeover in the tapped transformer

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Publication number Priority date Publication date Assignee Title
US7843493B2 (en) 2006-01-31 2010-11-30 Konica Minolta Holdings, Inc. Image sensing apparatus and image processing method
CN102136354B (en) * 2010-12-16 2012-10-24 保定天威集团有限公司 Large-range on-load tap changer (OLTC) for testing
CN105580100B (en) 2013-08-27 2017-12-12 赖茵豪森机械制造公司 Load ratio bridging switch, the adjustable variable-pressure device for voltage-regulation and the method for implementing conversion in adjustable variable-pressure device
DE102018119163A1 (en) 2018-08-07 2020-02-13 Maschinenfabrik Reinhausen Gmbh LOAD STEP SWITCH FOR UNINTERRUPTED SWITCHING BETWEEN WINDING TAPS OF A STEPPED TRANSFORMER AND STEPPED TRANSFORMER

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6509C (en) * 1917-11-13
NL147895B (en) * 1968-10-02 1975-11-17 Smit Nijmegen Electrotec CONTROL SWITCH FOR AN ADJUSTABLE TRANSFORMER.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013109289A1 (en) 2013-08-27 2015-03-05 Maschinenfabrik Reinhausen Gmbh On-load tap-changer, tap-changer for voltage regulation and method for carrying out a changeover in the tapped transformer
DE102013109289B4 (en) * 2013-08-27 2017-09-14 Maschinenfabrik Reinhausen Gmbh On-load tap-changer, tap-changer for voltage regulation and method for carrying out a changeover in the tapped transformer
DE102013109289B8 (en) * 2013-08-27 2017-12-28 Maschinenfabrik Reinhausen Gmbh On-load tap-changer, tap-changer for voltage regulation and method for carrying out a changeover in the tapped transformer
DE102014103526A1 (en) 2014-03-14 2015-09-17 Maschinenfabrik Reinhausen Gmbh On-load tap-changer, tap-changer for voltage regulation and method for carrying out a changeover in the tapped transformer

Also Published As

Publication number Publication date
CN1010902B (en) 1990-12-19
EP0213461A1 (en) 1987-03-11
JPS6245106A (en) 1987-02-27
DE3671323D1 (en) 1990-06-21
DE3529886A1 (en) 1987-02-26
ATE52875T1 (en) 1990-06-15
CN86104379A (en) 1987-03-04
JPH0646615B2 (en) 1994-06-15

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