EP0637829A1 - Sélecteur de prises pour transformateur à échelons - Google Patents

Sélecteur de prises pour transformateur à échelons Download PDF

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Publication number
EP0637829A1
EP0637829A1 EP94102842A EP94102842A EP0637829A1 EP 0637829 A1 EP0637829 A1 EP 0637829A1 EP 94102842 A EP94102842 A EP 94102842A EP 94102842 A EP94102842 A EP 94102842A EP 0637829 A1 EP0637829 A1 EP 0637829A1
Authority
EP
European Patent Office
Prior art keywords
spring
contact
elevator carriage
switching
additional spring
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
EP94102842A
Other languages
German (de)
English (en)
Other versions
EP0637829B1 (fr
Inventor
Rolf Ing. Grad. Lauterwald
Josef Neumeyer
Wolfgang Dipl.-Ing. Albrecht (Tu)
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 EP0637829A1 publication Critical patent/EP0637829A1/fr
Application granted granted Critical
Publication of EP0637829B1 publication Critical patent/EP0637829B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H9/0027—Operating mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3052—Linear spring motors

Definitions

  • the invention relates to a tap changer for a tap changer according to the preamble of the first claim.
  • tap changers are known from WO 94/02955.
  • tap changers are constructed according to the principle of fast resistance switching for uninterrupted switching from one tap of a tap transformer to another in such a way that the fixed tap contacts, which are electrically connected to the leads of the tap windings, are circular in one or more horizontal planes or planes on an insulating frame or cylinders are arranged and can be connected by rotating contact bridges actuated by concentric drive shafts.
  • the contact bridges are operated abruptly after triggering an energy store, usually a spring force store, which is pulled up by the drive shaft of the switch.
  • the vertically displaceable switching mechanism consists of an elevator carriage that can be driven continuously by the drive shaft, which preselects the new fixed step contact, and an output part that can be pulled up by the elevator carriage by means of an energy store, which after triggering runs after the elevator carriage and thereby the Actual load switchover from the previous tap of the step winding to the preselected new tap.
  • the switching elements required for this are part of the driven part.
  • a disadvantage of this tap changer is that the driven part necessarily has a number of different mechanical guide and electrical contact elements, as well as the switching elements and means for their actuation, and thus overall a not inconsiderable mass. From this it follows inevitably that since the spring energy storage releases the same energy each time it is triggered, the abrupt movement of the stripping part takes place more slowly than downwards, since in the first case the energy content of gravity of the stripping part counteracts the energy content of the spring energy storage while it adds to this in the second case. Such a different switching speed depending on the switching direction is undesirable; rather, it is desirable that, as in the known step switches operated by rotatable horizontal contact bridges, each changeover takes place with at least approximately the same switching speed.
  • the object of the invention is therefore to provide a way to compensate for the weight of the abruptly tracked output part in the aforementioned vertically moved linear tap changers, such that it does not affect the switching speed depending on the direction.
  • the additional spring according to the invention between the elevator carriage and the driven part is, as in Embodiment will be explained in more detail, a simple way to compensate for the dead weight of the output part and thus an equalization of the switching speed regardless of the switching direction with little additional design effort.
  • Both tension and compression springs are suitable as additional springs. If a tension spring is used, it must be arranged between the elevator carriage and the driven part in such a way that when a shifting movement is prepared downwards, i.e.
  • the elevator carriage has already been moved vertically downwards to the next fixed step contact, and the driven part before the energy storage device is triggered, the previous one (Overlying) fixed step contact remains, the tension spring is in the rest position, ie without or with little pretension, and is pulled open during the subsequent abrupt follow-up of the driven part, ie it is tensioned.
  • a compression spring it must be arranged in such a way that it is also in the rest position, ie in the relaxed or largely relaxed state, when the parts are in the described position and is compressed, that is also tensioned, during the subsequent abrupt succession of the driven part. This can be achieved by means of correspondingly selected articulation points for fastening the corresponding spring.
  • tension springs are more advantageous in that tension springs do not need an additional longitudinal guide, while compression springs of a certain length are at risk of kinking when being compressed, which makes additional longitudinal guidance, for example by a surrounding tube, necessary. It has been shown that, in particular when using a tension spring as an additional spring, an almost complete compensation of the kinetic energy caused by gravity is possible. In addition to an appropriately selected spring characteristic, adjustment is also made by simply varying the spring length Different weight and kinematic ratios of the energy storage possible.
  • the tap changer shown in FIG. 1 will first be described in more detail below. Laterally, vertically one above the other, the fixed step contacts K (n-1), K (n), K (n + 1), ..., each consisting of two parallel contact cheeks, extend into the interior of the switch. From the drive 1 arranged above, a threaded spindle 2 leads into the interior of the tap changer. This also has a spring energy store, which consists of a tubular elevator slide 3, which is enclosed by a compression spring 4 and in turn encloses the threaded spindle 2, by which it is driven. A preselecting auxiliary contact 5, each with a contact cheek, is insulated on the elevator slide 3 of the selected fixed step contact K through, and a vertically extending trigger contour 6 is also attached.
  • the spring energy store also consists of an essentially U-shaped output part 7. Another component of the output part 7 and thus its jump-like movement after triggering is a switching contact that connects the other contact part of each fixed step contact K-; This switch contact is not visible in the figure, since in the rest position shown it is in the same horizontal plane behind the preselecting auxiliary contact 5.
  • a tension spring 11 is clamped at the top at an attachment point 11.1 of the elevator carriage 3 and at the lower end at an attachment point 11.2 of the driven part 7 in such a way that it is at rest, ie when the leading auxiliary contact 5 and the trailing switching contact are applied to the same fixed step contact, below Preload is present, ie pulled apart from its rest position by a certain amount.
  • the threaded spindle 2 performs a rotary movement and moves the tubular elevator slide 3, which surrounds it, continuously up or down, depending on the direction of rotation.
  • the compression spring 4 of the energy store which is supported against an upper abutment 4.1 or a lower abutment 4.2, is tensioned; the spring energy storage is pulled up.
  • a roller 8 of a trigger bar 9 of the output part 7 runs on the likewise vertically moving trigger contour 6, which has slopes 6.1, 6.2.
  • the preselecting auxiliary contact 5, which is fixedly connected to the elevator carriage 3 moves; it leaves the original fixed step contact K (n) and reaches the next, above or below the fixed step contact K (n + 1), K (n-1).
  • the roller 8 reaches the respective slope 6.1 or 6.2; the trigger bar 9 is shifted horizontally out of the lock 10.n assigned to the fixed step contact K (n) and the complete stripping part 7 abruptly follows the previous movement of the elevator carriage 3 until the trigger bar 9 is in the lock 10 assigned to the newly reached fixed step contact.
  • FIG. 2 shows the switching processes described again schematically; the corresponding characteristic curves of the force profiles can be seen from FIG. 3. It can be seen that the same conditions prevail regardless of the switching direction.
  • Fig. 4 shows the resulting energy balance in the tap changer described.
  • E1 is the energy content of the energy storage spring 4, E2 that of the gravity acting on the output part 7 and E3 that of the additional spring 11, namely E3 'for the downward and E3'' when shifting up.
  • FIG. 5 schematically shows the relationships that result when using a compression spring instead of a tension spring.
  • a compression spring when using a compression spring, its articulation or fastening points on the elevator carriage 3 or driven part 7 must be selected differently; otherwise the characteristics of the acting forces and the energy balance remain unchanged.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Protection Of Transformers (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Keying Circuit Devices (AREA)
  • Springs (AREA)
  • Types And Forms Of Lifts (AREA)
  • Push-Button Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Elevator Door Apparatuses (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP94102842A 1993-08-04 1994-02-25 Sélecteur de prises pour transformateur à échelons Expired - Lifetime EP0637829B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4326127 1993-08-04
DE4326127A DE4326127C1 (de) 1993-08-04 1993-08-04 Stufenschalter für einen Stufentransformator

Publications (2)

Publication Number Publication Date
EP0637829A1 true EP0637829A1 (fr) 1995-02-08
EP0637829B1 EP0637829B1 (fr) 1997-01-08

Family

ID=6494417

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94102842A Expired - Lifetime EP0637829B1 (fr) 1993-08-04 1994-02-25 Sélecteur de prises pour transformateur à échelons

Country Status (5)

Country Link
EP (1) EP0637829B1 (fr)
JP (1) JP3599246B2 (fr)
AT (1) ATE147538T1 (fr)
DE (2) DE4326127C1 (fr)
ES (1) ES2096358T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19855860C1 (de) * 1998-12-03 2000-02-17 Reinhausen Maschf Scheubeck Kraftspeicher für einen Stufenschalter
DE102012105152B4 (de) * 2012-06-14 2015-11-12 Maschinenfabrik Reinhausen Gmbh Laststufenschalter zur unterbrechungslosen Umschaltung zwischen verschiedenen Wicklungsanzapfungen eines Stufentransformators
DE102013107554B4 (de) 2013-07-16 2016-05-19 Maschinenfabrik Reinhausen Gmbh Lastwähler
EP3731250B8 (fr) * 2019-04-23 2022-02-09 Hitachi Energy Switzerland AG Unité de ressort et commutateur de déviateur

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE609690C (de) * 1930-05-25 1935-02-21 Siemens Schuckertwerke Akt Ges Schnellschalter mit mehreren Schaltstufen, insbesondere fuer Reguliertransformatoren
US4636594A (en) * 1985-09-24 1987-01-13 G & W Electric Company Switch with auxiliary biasing mechanism

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4237165C1 (de) * 1992-11-04 1994-03-17 Reinhausen Maschf Scheubeck Einpoliger Stufenschalter mit linearer Kontaktbetätigung für einen Stufentransformator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE609690C (de) * 1930-05-25 1935-02-21 Siemens Schuckertwerke Akt Ges Schnellschalter mit mehreren Schaltstufen, insbesondere fuer Reguliertransformatoren
US4636594A (en) * 1985-09-24 1987-01-13 G & W Electric Company Switch with auxiliary biasing mechanism

Also Published As

Publication number Publication date
ATE147538T1 (de) 1997-01-15
ES2096358T3 (es) 1997-03-01
DE59401513D1 (de) 1997-02-20
EP0637829B1 (fr) 1997-01-08
DE4326127C1 (de) 1994-11-03
JPH07153633A (ja) 1995-06-16
JP3599246B2 (ja) 2004-12-08

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