EP2845212A1 - Sélecteur pour commutateur à gradins - Google Patents

Sélecteur pour commutateur à gradins

Info

Publication number
EP2845212A1
EP2845212A1 EP13719283.7A EP13719283A EP2845212A1 EP 2845212 A1 EP2845212 A1 EP 2845212A1 EP 13719283 A EP13719283 A EP 13719283A EP 2845212 A1 EP2845212 A1 EP 2845212A1
Authority
EP
European Patent Office
Prior art keywords
selector
honeycomb segments
contact
contacts
voter
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
EP13719283.7A
Other languages
German (de)
English (en)
Other versions
EP2845212B1 (fr
Inventor
Christian Pircher
Max Weidinger
Thomas Schuster
Moritz BENGLER
Robert Hiltner
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 EP2845212A1 publication Critical patent/EP2845212A1/fr
Application granted granted Critical
Publication of EP2845212B1 publication Critical patent/EP2845212B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • H01H9/0005—Tap change devices
    • H01H9/0016—Contact arrangements for tap changers
    • H01H2009/0022—Mounting of the fixed contacts or taps on cylindrical wall of oil vessel containing the tap changer; Details of screening
    • 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
    • H01H2009/0088—Details of rotatable shafts common to more than one pole or switch unit

Definitions

  • the invention relates to a selector for a tap changer for uninterrupted switching between winding taps of a tapped transformer.
  • the selector is used for the powerless preselection of the new winding tap to be switched to below.
  • the diverter switch is used for the actual - fast - uninterrupted switching from the previous to the new, no-load preselected winding tap.
  • a step switch with a selector is known from the company publication "OILTAP® M" of the applicant, Druckimpressum 03/09 In this selector, fixed selector contacts are arranged in a circle in several horizontal planes on an insulating material stand These fixed selector contacts are located in the interior of the insulating material stand.
  • the fixed selector contacts which are each in electrical connection with a winding tap of the associated tapped transformer, which is to be regulated, are here so on vertical
  • Isolierstoffstäben arranged and fastened. These Isolierstoffstäbe may consist of kraft paper, fiberglass or other insulating material.
  • the Isolierstoffstäbe form a framework of vertical, mutually parallel rods; The framework is fixed by an upper and a lower ring.
  • Insulating cylinder in turn, may consist of kraft paper, fiberglass or other insulating material.
  • VACUTAP® - On-load tap-changer for furnace applications Druckimpressum 09/07 of the applicant, a tap-changer of the type VR® is known, in which the selector does not consist of a closed insulating cylinder but of several individual cylindrical shells Segments that in the assembled state de facto a cylinder contour with
  • a tap-changer with freewheeling element is known.
  • the tap changer has a switching shaft on which a plurality of actuating elements arranged parallel to one another are fastened.
  • the actuators are designed as cams with projections.
  • Parallel to the switching shaft mechanical switching elements are arranged, which are actuated via the projections of the cams.
  • the mechanical switching elements are connected between the selector and the vacuum interrupters of the diverter switch. By operating the mechanical switching elements, the vacuum interrupters are to be protected in the non-load current leading load branch from possibly occurring surge voltages.
  • Winding taps is used, has two integrally formed, arranged in two levels one above the other fixing elements.
  • the fixing elements in the outer ring portion openings for the passage of contact bars.
  • each fixing element has a sleeve portion arranged in the middle, in which a switching shaft is mounted.
  • a tap changer for transformers which consists of a selector and a load switch.
  • the selector is used for the power-less preselection of tap tap and the load switch for fast switching under voltage.
  • the selector includes two rotary contacts which connect the taps of the transformer with one slip ring each and are driven by a shaft.
  • a tap changer with a preselection for uninterrupted switching between different winding taps of a tapped transformer is known.
  • Selection in general can on the one hand be designed as a coarse-step selector, on the other hand as a turner. In both cases, these means expand the control range. In other words, existing selector contacts can be used multiple times.
  • the coarse-grained selector does this by switching part of the trunk winding on or off. By the turner it is possible to add the control windings to the main winding or to switch against them, so to subtract. Also one
  • the prior art in such selectors for tap changers can therefore be summarized as follows:
  • the individual fixed selector contacts are arranged in a plurality of horizontal planes circular around a rotatable drive shaft around.
  • the arrangement of the selector contacts and their fixation is carried out either on individual rods of insulating material forming a cage stand, or in the wall of a Isolierstoffzylinders, or even in the wall of individual Isolierstoffzylindersegmenten, which also put together a circular arrangement.
  • the positioning of the fixed selector contacts is carried out vertically one above the other - in a Isolierstoffgerüst along the rods as support elements - in several levels.
  • the expansion of the control range is done via preselector which are designed as a coarse selector, Wender or a combination of both.
  • These parts also consist of Isolierstoffzylindersegmenten or Isolierstoffstäben which are arranged next to the fine selector.
  • the prior art has various disadvantages overall. The main drawback is that for different numbers of connectable winding taps of the associated tapped transformer and thus different numbers solid
  • Voter contacts also different constructive configurations of the voter are required.
  • the individual fixed selector contacts must have a certain minimum distance both horizontally and vertically to each other.
  • a large number of fixed struler giftede in a horizontal plane thus inevitably leads to a large diameter of both the Isolierstoffgerüstes and the insulating cylinder.
  • a large number of individual horizontal planes arranged one below the other results in an increased length of insulating framework as well as insulating cylinders.
  • the object of the invention is to eliminate these disadvantages and to provide a selector with an optional selection, which is modular and a reduction in complexity while covering the same variance, d.
  • the subclaims relate to advantageous developments of the invention.
  • the invention is based on the general idea, a generic voters of the modular form from always uniform, mutually offset next to each other and arranged honeycomb segments, is constructed.
  • the essential components for such a selector are honeycomb segments which are connected to one another via contacts, contact holders and bolts and are thereby surrounded by a shield.
  • the selector according to the invention offers numerous advantages. First of all, only a few different equal parts are required for its production. With these can be realized by the construction by means of the honeycomb segments with the same diameter different lengths and heights of the voter. In other words, the voter according to the invention is adaptable with low complexity to widely varying numbers of winding taps to be controlled and thus required fixed voter contacts.
  • Another advantage of the invention is that gaps remain in each horizontal plane between the connecting regions of the honeycomb segments and the contacts arranged there. Since the voters according to the invention, as usual, flows around and flows through the insulating oil in the transformer boiler, oil lines are thus realized both horizontally and vertically between all fixed selector contacts; this optimization of
  • Insulation distances leads to a high dielectric strength in a compact design.
  • honeycomb segments also make it possible to arrange selection in the simplest manner either next to or below the fine selector and to connect them together. This allows more flexible response to given space.
  • the same parts can be used.
  • the fine selector can be halved in height compared to the prior art. Due to the honeycomb structure there are no direct rod sections between the planes, whereby the dielectric strength is increased.
  • Figure 2 shows an inventive honeycomb segment with contacts, contact holders and
  • Figure 4 shows a contact with contact shield
  • Figure 5 shows an inventive selector
  • Figure 6 shows an inventive selector with mutually arranged fine selector and preselector
  • Figure 1 shows a honeycomb segment 1 according to the invention.
  • This is preferably made of a thermoplastic having a high dielectric strength, e.g. PPA.
  • Honeycomb segment 1 has four receiving areas 2 for contacts 3, contact holder 4 and pin 5.
  • each receiving area 2 has at least one contact recess 3.1 for the contact 3, at least one contact holder recesses 4.1 for the contact holder 4 and at least one bore 5.1 for the bolt 5.
  • the contact holder 4 also have holes 4.2, which with the holes 5.1 of the honeycomb segments. 1
  • FIG. 2 shows a honeycomb segment 1 in which the contact holder 4 is arranged around the contacts 3 in the receiving areas 2.
  • the contact holder 4 can be pushed onto the contacts 4.
  • recesses, holes or other geometric structures on the contact can help to form a positive connection between contact 3 and contact holder 4 during encapsulation.
  • the contact holder 4 is preferably made of a
  • Thermoplastic with a high dielectric strength Thermoplastic with a high dielectric strength. The number and strength of
  • Contact holder 4 can be varied as needed.
  • FIG. 3 shows five interconnected honeycomb segments 1, which form a ring with three levels for possible contacts 3.
  • the two upper contact levels are assigned to one phase and provide ten contacts 3 available.
  • Honeycomb segments 1, to connect with each other.
  • Honeycomb segment 1 with an empty receiving area 2, in the contact with 3 and
  • honeycomb segments 1 can be connected only with the aid of the bolt 5. This is advantageous when higher distances between the individual contacts 3 must be maintained at high voltages.
  • FIG. 4 illustrates a contact shield 6 with the aid of which the dielectric strength can be additionally increased.
  • This contact shield is formed in two parts in this embodiment. During assembly, both parts are positioned one above the other and connected with the help of integrated snap hooks. Other joining methods are conceivable, i. glue, screw, etc.
  • FIG. 5 illustrates an inventive selector 7 in the mounted state. This is composed of a plurality of honeycomb segments 1, which at the receiving areas. 2 are composed. Clearly visible are the different levels of contact with the different contacts 3. With only a few parts can thus inventively and modular produce a complete selector 7. Inside the selector 7, a relay column 8 with diverting rings 9 as well as contact bridges with a drive train (not shown here) are shown. In the upper part of the selector 7, interconnected honeycomb segments 1 without contacts 3 can be seen.
  • a selector 7 is shown, which is divided into fine selector 10 and preselector 1 1.
  • the fine selector 10 and the preselector 11 are made of identical honeycomb segments 1, which are connected to each other in the same way.
  • An intermediate gear 12 separates the located inside the contact bridges and drive trains.
  • honeycomb segments 1 are arranged side by side. Again, uniform honeycomb segments 1 are always used for both units.
  • honeycomb structure with its horizontal and vertical
  • Interspaces allow a particularly good circulation of the surrounding
  • Insulating medium usually insulating oil. Due to the shape of the honeycomb, there are no direct rod sections, i. direct connections, as in the prior art, between the contact planes. A high dielectric strength is ensured, although the height of the fine selector is reduced.
  • Preselection namely below the fine selection or next to it, brings many advantages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Protection Of Transformers (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

L'invention concerne un sélecteur destiné à un commutateur à gradins servant à commuter sans interruption des prises du bobinage d'un transformateur à gradins. Le sélecteur se compose de plusieurs segments en nid d'abeilles superposés horizontalement et juxtaposés verticalement qui peuvent être fixés les uns aux autres au moyen de supports de contacts et de boulons. La structure modulaire selon l'invention permet de réaliser de très nombreuses variantes de sélecteurs avec seulement un petit nombre de composants.
EP13719283.7A 2012-05-03 2013-04-19 Sélecteur pour commutateur à gradins Not-in-force EP2845212B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012103855.4A DE102012103855B4 (de) 2012-05-03 2012-05-03 Wähler für einen Stufenschalter
PCT/EP2013/058192 WO2013164211A1 (fr) 2012-05-03 2013-04-19 Sélecteur pour commutateur à gradins

Publications (2)

Publication Number Publication Date
EP2845212A1 true EP2845212A1 (fr) 2015-03-11
EP2845212B1 EP2845212B1 (fr) 2016-03-30

Family

ID=48224799

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13719283.7A Not-in-force EP2845212B1 (fr) 2012-05-03 2013-04-19 Sélecteur pour commutateur à gradins

Country Status (7)

Country Link
US (1) US9305719B2 (fr)
EP (1) EP2845212B1 (fr)
CN (1) CN104272415B (fr)
DE (1) DE102012103855B4 (fr)
HK (1) HK1204825A1 (fr)
UA (1) UA114317C2 (fr)
WO (1) WO2013164211A1 (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE357279B (fr) * 1971-11-02 1973-06-18 Asea Ab
US4532386A (en) * 1983-10-05 1985-07-30 Rte Corporation Dual voltage switch
DE19836463C1 (de) * 1998-08-12 1999-10-21 Reinhausen Maschf Scheubeck Stufenschalter mit einem Vorwähler
CN2755750Y (zh) * 2004-11-04 2006-02-01 江苏华鹏变压器有限公司 变压器无励磁分接开关
CN1841583A (zh) * 2005-03-28 2006-10-04 上海华明电力设备制造有限公司 组合式有载分接开关
DE102007023124B3 (de) * 2007-05-16 2008-10-02 Maschinenfabrik Reinhausen Gmbh Schaltanordnung
US7649147B2 (en) * 2007-09-14 2010-01-19 Riming Xiao Off-circuit tap changer device
US8153916B2 (en) * 2008-08-14 2012-04-10 Cooper Technologies Company Tap changer switch
US8013263B2 (en) 2008-08-14 2011-09-06 Cooper Technologies Company Multi-deck transformer switch
DE102010007535B4 (de) * 2010-02-11 2017-12-21 Maschinenfabrik Reinhausen Gmbh Stufenschalter mit Freilaufelement
DE102010020130A1 (de) * 2010-05-11 2011-11-17 Maschinenfabrik Reinhausen Gmbh Lastumschalter für einen Stufenschalter
DE202010017884U1 (de) * 2010-05-11 2013-01-22 Maschinenfabrik Reinhausen Gmbh Schaltanordnung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013164211A1 *

Also Published As

Publication number Publication date
UA114317C2 (uk) 2017-05-25
EP2845212B1 (fr) 2016-03-30
HK1204825A1 (en) 2015-12-04
CN104272415A (zh) 2015-01-07
US20150060244A1 (en) 2015-03-05
CN104272415B (zh) 2016-09-07
US9305719B2 (en) 2016-04-05
DE102012103855B4 (de) 2016-01-07
WO2013164211A1 (fr) 2013-11-07
DE102012103855A1 (de) 2013-11-07

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