EP0223939A1 - Polyphase high tension isolating switch - Google Patents

Polyphase high tension isolating switch Download PDF

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Publication number
EP0223939A1
EP0223939A1 EP86112188A EP86112188A EP0223939A1 EP 0223939 A1 EP0223939 A1 EP 0223939A1 EP 86112188 A EP86112188 A EP 86112188A EP 86112188 A EP86112188 A EP 86112188A EP 0223939 A1 EP0223939 A1 EP 0223939A1
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EP
European Patent Office
Prior art keywords
contact
contact fingers
fingers
outer ends
knife
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
EP86112188A
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German (de)
French (fr)
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EP0223939B1 (en
Inventor
Peter Hunziker
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General Electric Switzerland GmbH
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Sprecher Energie AG
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Application filed by Sprecher Energie AG filed Critical Sprecher Energie AG
Priority to AT86112188T priority Critical patent/ATE45440T1/en
Publication of EP0223939A1 publication Critical patent/EP0223939A1/en
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Publication of EP0223939B1 publication Critical patent/EP0223939B1/en
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    • 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
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/42—Knife-and-clip contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/28—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with angularly-movable contact

Definitions

  • the present invention relates to a multi-phase high-voltage disconnector according to the preamble of claim 1.
  • Such a circuit breaker is known for example from DE-OS 33 36 770.
  • the contact fingers of each of the movable contact sets are arranged in layers in two packages, the one package comprising the one and the other package the other contact fingers of each pair.
  • Each package has - seen in the direction of the pivot axis of the carrier body - an essentially rectangular outline, the shorter sides of which are formed by the inner or the outer ends of the contact fingers.
  • the pivot axis of the carrier body and consequently the movable contact sets intersect the shorter side of the rectangular packages, which are formed by the inner ends of the contact fingers, at a right angle.
  • both the inner and the outer ends of the contact fingers perform an arc-shaped path with the same radius in pairs in the course of a switching stroke.
  • this also means that the grinding marks on the contact blades, which are inevitable and caused by repeated switching strokes, are always "traversed" by the ends of two contact fingers of one and the same package - at least over part of their length, which is comparatively few on the contact blades the more pronounced signs of wear and thus leads to more frequent maintenance work.
  • the isolating switch is designed particularly advantageously, because then all contact fingers can be produced, for example, with one and the same punching tool.
  • each end of the contact fingers produce its "own” grinding track, but these grinding tracks are also of substantially the same length on the second contact knife.
  • the isolating switch 10 shown is part of a gas-insulated high-voltage switchgear housed in a metal encapsulation 11.
  • a metal encapsulation 11 Arranged in the metal encapsulation II are three tubular busbars 12, 13 and 14, which in FIG. 1 run at right angles to the plane of the drawing.
  • the isolating switch l0 has three movable contact sets l5, l6 and l7, which are designed identically to one another. Each of the contact sets l5, l6 and l7 is held in a continuous recess l8, l9 and 20 in a common carrier body 2l made of an insulating material in a manner to be described.
  • the carrier body 2l On one end, the carrier body 2l has a stub shaft 22 which is rotatably mounted in a bearing insert 23 fastened in the metal encapsulation ll. At the other end, the carrier body 2l ends in a drive shaft 24, which is brought out gas-tight from the metal encapsulation 11 through a bushing 25 and is coupled there to a rotary drive, not shown.
  • the rotation or pivot axis 26 of the carrier body 2l is indicated in FIG. 1 with a dash-dotted line and in FIG. 2 with a point.
  • the support body 2l is cranked in the manner of a crankshaft in the region of the recesses 18-20.
  • Each of the contact sets l5-l7 has a number of essentially E-shaped contact fingers 27, 28, which are arranged in pairs and with their laterally projecting legs facing each other and are biased towards each other by means of a leaf spring 29.
  • the contact fingers 27 and 28 are each stacked on top of one another to form a more or less compact package.
  • the two packages are held together by two brackets 30, 3l screwed together with bolts 29 '(FIG. 2), which hold the middle, laterally projecting legs of the contact fingers 27, 28 between them.
  • Over the packages of contact fingers 27, 28 protruding ends of the stirrups 30, 3l are kinked, so that these stirrups, as seen in FIG. 2, have the shape of an elongated S.
  • a molded-on projection 32, 33 extends from the inner wall of the recesses l8, l9, 20, these two projections only for the recess l8 in FIG. 2 are shown.
  • the packs of the contact fingers 27 and 28 (if the play between the ends of the brackets 30, 3l and the projections 32, 33 are not taken into account) are thus positively coupled to the carrier body 2l both in the radial direction and in the direction of rotation.
  • the leaf springs 29 are supported on the inner wall of a square tube stub 34, which in each case encloses one of the contact sets l5, l6, l7. In this pipe stub there are recesses 35, 36 (dashed lines in FIG. 1) for the passage of the bent ends of the brackets 30, 3l.
  • the laterally projecting legs of the contact fingers 27, 28 appearing at the bottom in FIG. 1 form their inner ends 37, 38, while the laterally projecting legs appearing at the top in FIG. 1 form their outer ends 39, 40.
  • the inner ends 37, 38 of the contact fingers 27, 28 of each of the contact sets l5, l6 and l7 are in constant engagement with one and the other flat side of a first fixed contact knife l39, l40 or l4l.
  • Each of these contact blades is led out of the encapsulation 11 via an insulating bushing 42, 43 or 44 and is galvanically there, for example with a cable outlet (not shown) connected.
  • the outer ends 39, 40 of the contact fingers 27, 28 of each of the contact sets l5, l6 and l7 are in the position shown in FIG. 1 and extended in FIG.
  • the contact blades 45 - 47 are parallel to one another and extend in the direction of the contact sets 15 - 17, the free contours (in FIG. 1) being congruent.
  • Each of these outer ends 39, 40 thus leaves its “own” grinding track on the corresponding flat side of the contact knives 45, 46 and 47, respectively, when the relevant contact set moves from the "ON" position shown in full line in FIG. 2 to the dash-dotted line and is turned with l5 'designated "OFF" position.
  • the contact knife 45 (and also the contact knives 46 and 47) has a penetration edge 45 'which is bevelled in a knife-like manner but with a blunt edge.
  • This penetration edge 45 ' runs in essence Chen parallel to the "step-like configuration" of the outer ends 39, 40 of the contact fingers 27, 28 when they are in engagement with the contact knife in question.
  • the consequence of this shape of the penetrating edge 45 ' is that each outer end 39, 40 on the corresponding flat side of the contact blades 45-47 not only leaves its "own” grinding track, but that all of these grinding tracks are also essentially of the same length.
  • the consequence of this is also that the outer ends 39, 40 of all contact fingers 27, 28 leave the associated contact blade 45 - 47 essentially simultaneously during a switch-off stroke and that the wear on these ends is practically uniform.
  • FIG. 2 also shows that the carrier body 2l and thus the contact sets l5-l7 can be rotated further clockwise from the "OFF" position denoted by l5 'in FIG. 2 until the outer ends 39, 40 the contact fingers 27, 28 come into engagement with a third, stationary and grounded contact knife 48, which position is indicated by dash-dotted lines in FIG. 2 and is designated by l5 " the outer ends 39, 40 of the contact fingers 27, 28 are pushed apart when they are about to come into engagement with the contact knife 48.
  • this penetration edge 48 ' is directed radially with respect to the pivot axis 26, so that during a switching stroke into the grounded position 25 "the outer ends 39, 40 are pushed apart one after the other.
  • the contact knife 48 At the penetrating edge 48 'on the contact knife 48 is a bead 49 extending at right angles to this (see also FIG. 4), which the outer Ends 39, 40 are pushed further apart so that they come out of engagement with the flat sides of the contact blade 48 adjoining the bead 49. In the earthed switching position, the contact knife 48 is in contact via its bulge 49 with the "shafts" of the contact fingers 47 and 48 which adjoin the outer ends 39, 40. This is a further measure to reduce the wear of the outer ends 39, 40 caused by abrasion.
  • the inner ends 37 and 38 of the contact fingers 27, 28 each describe a circular arc as they are pivoted about the pivot axis 26, with each circular side of the contact blades l39 - l4l having the same radius and the same length in pairs exhibit.
  • the grinding marks created by this do not overlap.
  • the contact blades 139 - 14l are preferably designed as shown in FIGS. 5 and 6.
  • 5 shows the contact fingers 27, 28 in their "ON" position (extended) and in their grounded position, designated by l5 "and shown in dash-dot lines.
  • the inner ends 37, 38 of the contact fingers likewise form a step-like configuration
  • Both flat sides of the knife contacts l39-l4l have flat elevations 50, 5l which are delimited by inclined ramps and which intersect and whose course corresponds to the step-like configuration of the inner ends 37, 38 of the switching fingers 27, 28 in the two switching positions mentioned Position l5 'therefore only the minor number of inner ends 37, 38 of the contact fingers exert a contact pressure, namely the inner ends closest to the pivot axis 26, while the other inner ends 37, 38 so to speak without pressure on the flat sides of the first contact knife l39 or l40, l4l rest. 5, the contact point of each of the inner ends 37, 38 with the associated contact knife l39-l4l is indicated with a small circle, this circle in no way representing a depression or an elevation.
  • the contact sets l5, l6, l7 are positively connected both in the radial direction and in the direction of rotation, but are coupled to the carrier body 2l with some play. This game serves to compensate for slight misalignments between the contact blades 45-47 and the contact blades l39-l4l and the contact blades 48.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Contacts (AREA)
  • Tumbler Switches (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

1. A polyphase high tension isolating switch, comprising for each phase a movable contact bank (15, 16, 17), which is always in engagement with a first, stationary contact blade (139, 140, 141) and by pivoting can be brought into and out of engagement with a second stationary contact blade (45, 46, 47), each contact bank (15, 16, 17) comprising a plurality of contact fingers (27, 28), which are arranged opposite one another in pairs, which extend transversely to the pivot axis (26) and which are resiliently prestressed relative to one another, and each contact bank (15, 16, 17) being held in a through aperture (18, 19, 20) in a common mounting body (21), which is pivotable about the pivot axis (26), and the inner ends (37, 38) of the contact fingers (27, 28) extending in the associated aperture (18, 19, 20) into the region of the pivot axis (26) and contacting here the first contact blade (139, 140, 141) on both sides, whereas the outer ends (39, 40) of the contact fingers (27, 28) project beyond the outer end of the associated aperture (18, 19, 20), characterised in that at least the outer ends (39, 40) of the contact fingers (27, 28) of each pair are arranged at a different distance from the pivot axis (26) in each case.

Description

Die vorliegende Erfindung betrifft einen mehrphasigen Hochspannungs-Trennschalter gemäss dem Oberbegriff des Patentanspruches l.The present invention relates to a multi-phase high-voltage disconnector according to the preamble of claim 1.

Ein solcher Trennschalter ist beispielsweise aus der DE-OS 33 36 770 bekannt. Bei dem bekannten Trennschalter sind die Kontaktfinger jedes der beweglichen Kontaktsätze geschichtet in zwei Paketen angeordnet, wobei das eine Paket die einen und das andere Paket die anderen Kontakt­finger jedes Paares umfasst. Jedes Paket hat - in Rich­tung der Schwenkachse des Trägerkörpers gesehen - einen im wesentlichen rechteckigen Umriss, dessen kürzere Sei­ten durch die inneren bzw. die äusseren Enden der Kon­taktfinger gebildet sind. Die Schwenkachse des Trägerkör­pers und mithin der beweglichen Kontaktsätze schneidet die kürzere Seite der rechteckigen Pakete, die durch die inneren Enden der Kontaktfinger gebildet sind, im rech­ten Winkel. Daraus ergibt sich, dass sowohl die inneren als auch die äusseren Enden der Kontaktfinger im Zuge eines Schalthubes jeweils paarweise eine kreisbogenförmi­ge Bahn mit ein- und demselben Radius ausführen. Das heisst aber auch, dass die an den Kontaktmessern unver­meidlichen, durch wiederholte Schalthübe verursachten Schleifspuren stets - wenigstens über einen Teil ihrer Länge - von den Enden zweier Kontaktfinger ein- und des­selben Paketes "befahren" werden, was an den Kontaktmes­sern zu zwar vergleichsweise wenigen aber umso ausgepräg­teren Abnützungsspuren und damit zu häufigeren Unter­haltsarbeiten führt.Such a circuit breaker is known for example from DE-OS 33 36 770. In the known disconnector, the contact fingers of each of the movable contact sets are arranged in layers in two packages, the one package comprising the one and the other package the other contact fingers of each pair. Each package has - seen in the direction of the pivot axis of the carrier body - an essentially rectangular outline, the shorter sides of which are formed by the inner or the outer ends of the contact fingers. The pivot axis of the carrier body and consequently the movable contact sets intersect the shorter side of the rectangular packages, which are formed by the inner ends of the contact fingers, at a right angle. It follows from this that both the inner and the outer ends of the contact fingers perform an arc-shaped path with the same radius in pairs in the course of a switching stroke. However, this also means that the grinding marks on the contact blades, which are inevitable and caused by repeated switching strokes, are always "traversed" by the ends of two contact fingers of one and the same package - at least over part of their length, which is comparatively few on the contact blades the more pronounced signs of wear and thus leads to more frequent maintenance work.

Es sind aber nicht nur die Kontaktmesser des bekannten Trennschalters, die der Abnützung unterworfen sind, son­dern auch die Enden der Kontaktfinger, die sich an ihren Kontaktstellen(Enden) stärker abnützen, wenn sie "ausge­fahrenen Geleisen" an den Kontaktmessern folgen.However, it is not only the contact blades of the known disconnector that are subject to wear, but also the ends of the contact fingers that wear out more at their contact points (ends) when they follow "extended tracks" on the contact blades.

Es ist daher ein Zweck der Erfindung, einen mehrphasigen Hochspannungs-Trennschalter der eingangs genannten Art zu schaffen, bei dem durch normalen Betrieb verursachte Abnützungen auf ein Mindestmass reduziert werden können.It is therefore an object of the invention to provide a multi-phase high-voltage disconnector of the type mentioned at the beginning in which wear caused by normal operation can be reduced to a minimum.

Zu diesem Zweck weist der vorgeschlagene Trennschalter die im Kennzeichen des Patentanspruches l angegebenen Merkmale auf.For this purpose, the proposed disconnector has the features specified in the characterizing part of patent claim 1.

Besonders vorteilhaft wird der Trennschalter gemäss An­spruch 2 ausgestaltet, denn dann können alle Kontaktfin­ger beispielsweise mit ein- und demselben Stanzwerkzeug hergestellt werden.The isolating switch is designed particularly advantageously, because then all contact fingers can be produced, for example, with one and the same punching tool.

Bei der bevorzugten Ausführungsform des Anspruches 3 er­zeugt nicht nur jedes Ende der Kontakfinger seine "eigne" Schleifspur, sondern diese Schleifspuren sind am zweiten Kontaktmesser auch im wesentlichen gleich lang.In the preferred embodiment of claim 3, not only does each end of the contact fingers produce its "own" grinding track, but these grinding tracks are also of substantially the same length on the second contact knife.

Weitere Massnahmen, die beitragen, auch weniger gravie­rende Abnützungserscheinungen an den Kontaktmessern und/­oder den Enden der Kontaktfinger zu verringern, sind in den übrigen, abhängigen Ansprüchen definiert.Further measures that contribute to reducing less serious signs of wear on the contact blades and / or the ends of the contact fingers are defined in the remaining, dependent claims.

Nachstehend ist anhand der Zeichnung ein Ausführungsbei­spiel des erfindungsgemässen Trennschalters beschrieben. Es zeigt:

  • Fig. l einen in einer metallgekapselten und gasiso­lierten Schaltanlage eingebauten Trennschal­ter in Ansicht in Richtung der Sammelschienen, wobei der links erscheinende Drittel im Schnitt längs der Linie I-I der Fig. 2 gezeigt ist,
  • Fig. 2 einen Schnitt längs der Linie II-II der Fig. l,
  • Fig. 3 in grösserem Massstab eine Einzelheit im Schnitt längs der Linie III-III der Fig. 2,
  • Fig. 4 einen Schnitt längs der Linie IV-IV der Fig. 2 durch ein geerdetes Kontaktmesser, mit im Eingriff stehenden Kontaktfingern,
  • Fig. 5 eine schematische Seitenansicht des ersten, ortsfesten Kontaktmessers, und
  • Fig. 6 einen Schnitt längs der Linie VI-VI der Fig. 5.
An exemplary embodiment of the disconnector according to the invention is described below with reference to the drawing. It shows:
  • 1 shows a disconnector installed in a metal-encapsulated and gas-insulated switchgear in the direction of the busbars, the third appearing on the left being shown in section along the line II in FIG. 2,
  • 2 shows a section along the line II-II of FIG. 1,
  • 3 on a larger scale a detail in section along the line III-III of FIG. 2,
  • 4 shows a section along the line IV-IV of FIG. 2 through an earthed contact knife, with the contact fingers engaged,
  • Fig. 5 is a schematic side view of the first, fixed contact knife, and
  • 6 shows a section along the line VI-VI of FIG. 5th

Der dargestellte Trennschalter l0 ist Teil einer in einer Metallkapselung ll untergebrachten, gasisolierten Hoch­spannungsschaltanlage. In der Metallkapselung ll sind drei rohrförmige Sammelschienen l2, l3 und l4 angeordnet, die in Fig. l rechtwinklig zur Zeichenebene verlaufen.The isolating switch 10 shown is part of a gas-insulated high-voltage switchgear housed in a metal encapsulation 11. Arranged in the metal encapsulation II are three tubular busbars 12, 13 and 14, which in FIG. 1 run at right angles to the plane of the drawing.

Der Trennschalter l0 weist drei bewegliche Kontaktsätze l5, l6 und l7 auf, die unter sich gleich ausgebildet sind. Jeder der Kontaktsätze l5, l6 und l7 ist in einer durchgehenden Ausnehmung l8, l9 und 20 in einem gemeinsa­men Trägerkörper 2l aus einem Isoliermaterial auf noch zu beschreibende Weise gehaltert.The isolating switch l0 has three movable contact sets l5, l6 and l7, which are designed identically to one another. Each of the contact sets l5, l6 and l7 is held in a continuous recess l8, l9 and 20 in a common carrier body 2l made of an insulating material in a manner to be described.

Einerends weist der Trägerkörper 2l einen Wellenstumpf 22 auf, der in einem in der Metallkapselung ll befestigten Lagereinsatz 23 drehbar gelagert ist. Andernends endet der Trägerkörper 2l in einer Antriebswelle 24, die durch eine Durchführungshülse 25 gasdicht aus der Metallkapse­lung ll herausgeführt ist und dort an einen nicht darge­stellten Drehantrieb gekoppelt ist. Die Dreh- oder Schwenkachse 26 des Trägerkörpers 2l ist in Fig. l mit einer strichpunktierten Linie und in Fig. 2 mit einem Punkt angedeutet.On one end, the carrier body 2l has a stub shaft 22 which is rotatably mounted in a bearing insert 23 fastened in the metal encapsulation ll. At the other end, the carrier body 2l ends in a drive shaft 24, which is brought out gas-tight from the metal encapsulation 11 through a bushing 25 and is coupled there to a rotary drive, not shown. The rotation or pivot axis 26 of the carrier body 2l is indicated in FIG. 1 with a dash-dotted line and in FIG. 2 with a point.

Aus Fig. l ist ersichtlich, dass der Trägerkörper 2l im Bereich der Ausnehmungen l8 - 20 in der Art einer Kurbel­welle gekröpft ist.It can be seen from FIG. 1 that the support body 2l is cranked in the manner of a crankshaft in the region of the recesses 18-20.

Jeder der Kontaktsätze l5 - l7 besitzt eine Anzahl im we­sentlichen E-förmige Kontaktfinger 27, 28, die paarweise und mit ihren seitlich abstehenden Schenkeln einander zu­gekehrt angeordnet und mittels je einer Blattfeder 29 aufeinander zu vorgespannt sind. Die Kontaktfinger 27 und 28 sind je zu einem mehr oder weniger kompakten Paket aufeinander geschichtet. Zusammengehalten werden die bei­den Pakete durch zwei miteinander mit Bolzen 29' (Fig. 2) verschraubten Bügel 30, 3l, die die mittleren, seitlich abstehenden Schenkel der Kontaktfinger 27, 28 zwischen sich haltern. Die über die Pakete der Kontaktfinger 27, 28 abstehenden Enden der Bügel 30, 3l sind abgeknickt, so dass diese Bügel, in Fig. 2 gesehen, die Form etwa eines gestreckten S aufweisen. Zwischen diese abgeknick­ten Enden der Bügel 30, 3l erstreckt sich mit etwas Spiel je ein angeformter, von der Innenwand der Ausnehmungen l8, l9, 20 nach innen sich erstreckender Vorsprung 32, 33, wobei diese beiden Vorsprünge nur für die Ausnehmung l8 in Fig. 2 gezeigt sind. In diesem Zusammenhang ist auch auf Fig. 3 zu verweisen. Damit sind die Pakete der Kontaktfinger 27 und 28 (lässt man das Spiel zwischen den Enden der Bügel 30, 3l und den Vorsprüngen 32, 33 unbe­rücksichtigt) sowohl in radialer Richtung als auch in Drehrichtung formschlüssig an den Trägerkörper 2l gekop­pelt. Die Blattfedern 29 sind an der Innenwand eines Vierkant-Rohrstummels 34 abgestützt, der jeweils einen der Kontaktsätze l5, l6, l7 umschliesst. In diesem Rohr­stummel sind Aussparungen 35, 36 (gestrichelt in Fig. l) zum Durchlass der abgeknickten Enden der Bügel 30, 3l vorhanden.Each of the contact sets l5-l7 has a number of essentially E-shaped contact fingers 27, 28, which are arranged in pairs and with their laterally projecting legs facing each other and are biased towards each other by means of a leaf spring 29. The contact fingers 27 and 28 are each stacked on top of one another to form a more or less compact package. The two packages are held together by two brackets 30, 3l screwed together with bolts 29 '(FIG. 2), which hold the middle, laterally projecting legs of the contact fingers 27, 28 between them. Over the packages of contact fingers 27, 28 protruding ends of the stirrups 30, 3l are kinked, so that these stirrups, as seen in FIG. 2, have the shape of an elongated S. Between these bent ends of the brackets 30, 3l, with a little play, a molded-on projection 32, 33 extends from the inner wall of the recesses l8, l9, 20, these two projections only for the recess l8 in FIG. 2 are shown. In this context, reference should also be made to FIG. 3. The packs of the contact fingers 27 and 28 (if the play between the ends of the brackets 30, 3l and the projections 32, 33 are not taken into account) are thus positively coupled to the carrier body 2l both in the radial direction and in the direction of rotation. The leaf springs 29 are supported on the inner wall of a square tube stub 34, which in each case encloses one of the contact sets l5, l6, l7. In this pipe stub there are recesses 35, 36 (dashed lines in FIG. 1) for the passage of the bent ends of the brackets 30, 3l.

Die in Fig. l unten erscheinenden, seitlich abstehenden Schenkel der Kontaktfinger 27, 28 bilden deren innere En­den 37, 38, während die in Fig. l oben erscheinenden, seitlich abstehenden Schenkel deren äussere Enden 39, 40 bilden.The laterally projecting legs of the contact fingers 27, 28 appearing at the bottom in FIG. 1 form their inner ends 37, 38, while the laterally projecting legs appearing at the top in FIG. 1 form their outer ends 39, 40.

Die inneren Enden 37, 38 der Kontaktfinger 27, 28 jedes der Kontaktsätze l5, l6 und l7 sind in stetem Eingriff mit der einen und anderen Flachseite je eines ersten ortsfesten Kontaktmessers l39, l40 bzw. l4l. Jedes dieser Kontaktmesser ist über eine isolierende Durchführung 42, 43 bzw. 44 aus der Kapselung ll herausgeführt und dort galvanisch beispielsweise mit einem Kabelabgang (nicht dargestellt) verbunden. Die äusseren Enden 39, 40 der Kontaktfinger 27, 28 jedes der Kontaktsätze l5, l6 und l7 stehen in der in Fig. l und ausgezogen in Fig. 2 darge­stellten Stellung im Eingriff mit einem zweiten Kontakt­messer 45, 46 bzw. 47, wobei jedes dieser Kontaktmesser von einer der Sammelschienen l2, l3 bzw. l4 ausgeht und an dieser beispielsweise angeschweisst ist. Die Kontakt­messer 45 - 47 sind parallel zueinander und erstrecken sich in Richtung zu den Kontaktsätzen l5 - l7 hin, wobei deren freie Konturen (in Fig. l) deckungsgleich sind.The inner ends 37, 38 of the contact fingers 27, 28 of each of the contact sets l5, l6 and l7 are in constant engagement with one and the other flat side of a first fixed contact knife l39, l40 or l4l. Each of these contact blades is led out of the encapsulation 11 via an insulating bushing 42, 43 or 44 and is galvanically there, for example with a cable outlet (not shown) connected. The outer ends 39, 40 of the contact fingers 27, 28 of each of the contact sets l5, l6 and l7 are in the position shown in FIG. 1 and extended in FIG. 2 in engagement with a second contact knife 45, 46 and 47, each of which Contact knife starts from one of the busbars l2, l3 or l4 and is welded to this, for example. The contact blades 45 - 47 are parallel to one another and extend in the direction of the contact sets 15 - 17, the free contours (in FIG. 1) being congruent.

Zurückkommend auf die Kontaktsätze l5 - l7 erkennt man insbesondere in Fig. 2, dass wegen der ungleichen Ab­stände der Vorsprünge 32 und 33 von der Schwenkachse 26 und wegen des durch die abgeknickten Enden gegebenen schiefwinkligen Verlaufs der Bügel 30 und 3l in bezug auf die Längserstreckung der Kontaktfinger 27, 28, deren äus­sere Enden 39, 40 den Paketen dieser Kontaktfinger eine "treppenartige Konfiguration" geben. Mit anderen Worten heisst dies, dass die äusseren Enden 39, 40 der Kontakt­finger 27, 28 paarweise einen unterschiedlichen Abstand von der Schwenkachse 26 aufweisen. Mithin hinterlässt je­des dieser äusseren Enden 39, 40 auf der entsprechenden Flachseite der Kontaktmesser 45, 46 bzw. 47 seine "eige­ne" Schleifspur, wenn der betreffende Kontaktsatz von der in Fig. 2 ausgezogen dargestellten "EIN"-Stellung im Uhrzeigersinn in die strichpunktiert und mit l5' bezeichnete "AUS"-Stellung verdreht wird.Returning to the contact sets l5 - l7, it can be seen in particular in FIG. 2 that because of the unequal distances of the projections 32 and 33 from the pivot axis 26 and because of the obliquely angular course of the brackets 30 and 3l given by the bent ends with respect to the longitudinal extent of the Contact fingers 27, 28, the outer ends 39, 40 of which give the packages of these contact fingers a "stair-like configuration". In other words, this means that the outer ends 39, 40 of the contact fingers 27, 28 have a different distance from the pivot axis 26 in pairs. Each of these outer ends 39, 40 thus leaves its "own" grinding track on the corresponding flat side of the contact knives 45, 46 and 47, respectively, when the relevant contact set moves from the "ON" position shown in full line in FIG. 2 to the dash-dotted line and is turned with l5 'designated "OFF" position.

Man erkennt ferner aus Fig. 2, dass das Kontaktmesser 45 (und genauso auch die Kontaktmesser 46 und 47) eine mes­serartig jedoch stumpf angeschrägte Eindringkante 45′ aufweist. Diese Eindringkante 45′ verläuft im wesentli­ chen parallel zur "treppenartigen Konfiguration" der äus­seren Enden 39, 40 der Kontaktfinger 27, 28, wenn diese im Eingriff mit dem betreffenden Kontaktmesser sind. Die Konsequenz dieser Formgebung der Eindringkante 45′ ist die, dass jedes äussere Ende 39, 40 auf der entsprechen­den Flachseite der Kontaktmesser 45 - 47 nicht nur seine "eigene" Schleifspur hinterlässt, sondern dass alle diese Schleifspuren auch im wesentlichen gleich lang sind. Die Folge davon ist auch, dass die äusseren Enden 39, 40 al­ler Kontaktfinger 27, 28 das zugeordnete Kontaktmesser 45 - 47 bei einem Ausschalthub im wesentlichen gleichzei­tig verlassen und dass dadurch die Abnützung an diesen Enden praktisch gleichmässig ist.It can also be seen from FIG. 2 that the contact knife 45 (and also the contact knives 46 and 47) has a penetration edge 45 'which is bevelled in a knife-like manner but with a blunt edge. This penetration edge 45 'runs in essence Chen parallel to the "step-like configuration" of the outer ends 39, 40 of the contact fingers 27, 28 when they are in engagement with the contact knife in question. The consequence of this shape of the penetrating edge 45 'is that each outer end 39, 40 on the corresponding flat side of the contact blades 45-47 not only leaves its "own" grinding track, but that all of these grinding tracks are also essentially of the same length. The consequence of this is also that the outer ends 39, 40 of all contact fingers 27, 28 leave the associated contact blade 45 - 47 essentially simultaneously during a switch-off stroke and that the wear on these ends is practically uniform.

Der Fig. 2 lässt sich weiterhin entnehmen, dass sich der Trägerkörper 2l und damit die Kontaktsätze l5 - l7 aus der in Fig. 2 mit l5' bezeichneten "AUS"-Stellung im Uhr­zeigersinn noch weiter verdrehen lässt, bis die äusseren Enden 39, 40 der Kontaktfinger 27, 28 in Eingriff mit einem dritten, ortsfesten und geerdeten Kontaktmesser 48 gelangen, welche Stellung in Fig. 2 strichpunktiert ange­deutet und mit l5" bezeichnet ist. Dieses geerdete Kon­taktmesser 48 besitzt ebenfalls eine messerartig, jedoch stumpf angeschrägte Eindringkante 48′, die die äusseren Enden 39, 40 der Kontaktfinger 27, 28 auseinanderdrängt, wenn diese im Begriffe stehen, in Eingriff mit dem Kon­taktmesser 48 zu gelangen. Diese Eindringkante 48′ ist jedoch bezüglich der Schwenkachse 26 radial gerichtet, so dass bei einem Schalthub in die geerdete Stellung 25" die äusseren Enden 39, 40 nacheinander auseinanderge­drängt werden. An die Eindringkante 48′ schliesst am Kon­taktmesser 48 ein rechtwinklig zu dieser verlaufender Wulst 49 (vergleiche auch Fig. 4) an, der die äusseren Enden 39, 40 noch weiter auseinanderdrängt, so dass diese ausser Eingriff mit den an den Wulst 49 anschliessenden Flachseiten des Kontaktmessers 48 gelangen. In der geer­deten Schaltstellung steht somit das Kontaktmesser 48 über seinen Wulst 49 mit den an die äusseren Enden 39, 40 anschliessenden "Schäfte" der Kontaktfinger 47 und 48 in Kontakt. Dies ist eine weitere Massnahme, um die durch Abrieb verursachte Abnützung der äusseren Enden 39, 40 zu verringern.FIG. 2 also shows that the carrier body 2l and thus the contact sets l5-l7 can be rotated further clockwise from the "OFF" position denoted by l5 'in FIG. 2 until the outer ends 39, 40 the contact fingers 27, 28 come into engagement with a third, stationary and grounded contact knife 48, which position is indicated by dash-dotted lines in FIG. 2 and is designated by l5 " the outer ends 39, 40 of the contact fingers 27, 28 are pushed apart when they are about to come into engagement with the contact knife 48. However, this penetration edge 48 'is directed radially with respect to the pivot axis 26, so that during a switching stroke into the grounded position 25 "the outer ends 39, 40 are pushed apart one after the other. At the penetrating edge 48 'on the contact knife 48 is a bead 49 extending at right angles to this (see also FIG. 4), which the outer Ends 39, 40 are pushed further apart so that they come out of engagement with the flat sides of the contact blade 48 adjoining the bead 49. In the earthed switching position, the contact knife 48 is in contact via its bulge 49 with the "shafts" of the contact fingers 47 and 48 which adjoin the outer ends 39, 40. This is a further measure to reduce the wear of the outer ends 39, 40 caused by abrasion.

Auf den Kontaktmessern l39, l40 und l4l beschreiben die inneren Enden 37 und 38 der Kontaktfinger 27, 28 bei ihrer Verschwenkung um die Schwenkachse 26 jeweils einen Kreisbogen, wobei jeweils auf jeder Flachseite der Kon­taktmesser l39 - l4l diese Kreisbogen paarweise jeweils denselben Radius und dieselbe Länge aufweisen. Die da­durch erzeugten Schleifspuren überdecken sich indessen nicht.On the contact blades l39, l40 and l4l, the inner ends 37 and 38 of the contact fingers 27, 28 each describe a circular arc as they are pivoted about the pivot axis 26, with each circular side of the contact blades l39 - l4l having the same radius and the same length in pairs exhibit. The grinding marks created by this do not overlap.

Um aber die Abnützung auch der inneren Enden 37, 38 der Kontaktfinger 27, 28 zu vermindern, sind die Kontaktmes­ser l39 - l4l vorzugsweise wie in Fig. 5 und 6 darge­stellt ausgebildet. Man erkennt in Fig. 5 die Kontaktfin­ger 27, 28 in ihrer "EIN"-Stellung (ausgezogen) und in ihrer mit l5" bezeichneten und strichpunktiert darge­stellten geerdeten Stellung. Die inneren Enden 37, 38 der Kontaktfinger bilden ebenfalls eine treppenartige Konfi­guration. An den beiden Flachseiten der Messerkontakte l39 - l4l sind flache, durch angeschrägte Rampen begrenz­te Erhebungen 50, 5l vorhanden, die sich kreuzen und de­ren Verlauf der treppenartigen Konfiguration der inneren Enden 37, 38 der Schaltfinger 27, 28 in den beiden er­wähnten Schaltstellungen entspricht. In der Ausschalt­ stellung l5′ übt somit nur die Minderzahl der inneren Enden 37, 38 der Kontaktfinger einen Kontaktdruck aus, nämlich die der Schwenkachse 26 am nächsten liegenden inneren Enden, während die übrigen inneren Enden 37, 38 sozusagen drucklos auf den Flachseiten des ersten Kon­taktmessers l39 bzw. l40, l4l aufliegen. In Fig. 5 ist die Kontaktstelle jedes der inneren Enden 37, 38 mit dem zugeordneten Kontaktmesser l39 - l4l mit einem kleinen Kreis angedeutet, wobei dieser Kreis keineswegs eine Ver­tiefung oder eine Erhebung darstellt.However, in order to reduce the wear on the inner ends 37, 38 of the contact fingers 27, 28, the contact blades 139 - 14l are preferably designed as shown in FIGS. 5 and 6. 5 shows the contact fingers 27, 28 in their "ON" position (extended) and in their grounded position, designated by l5 "and shown in dash-dot lines. The inner ends 37, 38 of the contact fingers likewise form a step-like configuration Both flat sides of the knife contacts l39-l4l have flat elevations 50, 5l which are delimited by inclined ramps and which intersect and whose course corresponds to the step-like configuration of the inner ends 37, 38 of the switching fingers 27, 28 in the two switching positions mentioned Position l5 'therefore only the minor number of inner ends 37, 38 of the contact fingers exert a contact pressure, namely the inner ends closest to the pivot axis 26, while the other inner ends 37, 38 so to speak without pressure on the flat sides of the first contact knife l39 or l40, l4l rest. 5, the contact point of each of the inner ends 37, 38 with the associated contact knife l39-l4l is indicated with a small circle, this circle in no way representing a depression or an elevation.

Es wurde bereits erwähnt, dass die Kontaktsätze l5, l6, l7 sowohl in radialer als auch in Drehrichtung form­schlüssig, jedoch mit etwas Spiel an den Trägerköprer 2l gekoppelt sind. Dieses Spiel dient dazu, geringe Fluch­tungsfehler zwischen den Kontaktmessern 45 - 47 und den Kontaktmessern l39 - l4l sowie den Kontaktmessern 48 aus­zugleichen.It has already been mentioned that the contact sets l5, l6, l7 are positively connected both in the radial direction and in the direction of rotation, but are coupled to the carrier body 2l with some play. This game serves to compensate for slight misalignments between the contact blades 45-47 and the contact blades l39-l4l and the contact blades 48.

Claims (6)

1. Mehrphasiger Hochspannungs-Trennschalter, mit je Phase einem beweglichen Kontaktsatz (l5, l6, l7), der stets im Eingriff mit einem ersten, ortsfesten Kontakt­messer (l39, l40, l4l) und unter Verschwenkung in und ausser Eingriff mit einem zweiten, ortsfesten Kontaktmes­ser (45, 46, 47) bringbar ist, wobei jeder Kontaktsatz (l5, l6, l7) mehrere, je paarweise einander gegenüberlie­gende, quer zur Schwenkachse (26) verlaufende und fe­dernd aufeinander zu vorgespannte Kontaktfinger (27, 28) aufweist und je in einer durchgehenden Ausnehmung (l8, l9, 20) in einem gemeinsamen Trägerkörper (2l) gehaltert ist, der um die Schwenkachse (26) verdrehbar ist, und wo­bei die inneren Enden (37, 38) der Kontaktfinger (27, 28) in der zugeordneten Ausnehmung (l8, l9, 20) sich bis in den Bereich der Schwenkachse (26) erstrecken und dort das erste Kontaktmesser (l39, l40, l4l) beidseitig kontaktie­ren, während die äusseren Enden (39, 40) der Kontaktfin­ger (27, 28) über das äussere Ende der zugeordneten Aus­nehmung (l8, l9, 20) vorstehen, dadurch gekennzeichnet, dass zumindest die äusseren Enden (39, 40) der Kontakt­finger (27, 28) jedes der Paare je einen unterschiedli­chen Abstand von der Schwenkachse (26) aufweisen.1.Multi-phase high-voltage isolating switch, each with a movable contact set (l5, l6, l7), which is always in engagement with a first, fixed contact blade (l39, l40, l4l) and with pivoting into and out of engagement with a second, stationary Contact knife (45, 46, 47) can be brought, with each contact set (l5, l6, l7) having a plurality of contact fingers (27, 28), each opposing each other in pairs, running transversely to the pivot axis (26) and resiliently biased towards each other a continuous recess (18, 19, 20) is held in a common carrier body (2l) which can be rotated about the pivot axis (26), and the inner ends (37, 38) of the contact fingers (27, 28) in the associated Recess (l8, l9, 20) extend into the area of the pivot axis (26) and there contact the first contact knife (l39, l40, l4l) on both sides, while the outer ends (39, 40) of the contact fingers (27, 28) over the outer end of the assigned Protruding recess (18, 19, 20), characterized in that at least the outer ends (39, 40) of the contact fingers (27, 28) of each of the pairs are each at a different distance from the pivot axis (26). 2. Trennschalter nach Anspruch l, bei dem die Kon­taktfinger (27, 28) jedes beweglichen Kontaktsatzes (l5, l6, l7) dieselbe Länge aufweisen und in zwei einander ge­genüberliegenden Paketen geschichtet sind, dadurch ge­kennzeichnet, dass die inneren und die äusseren Enden (37, 38; 39, 40) der Kontaktfinger (27, 28) jedes Paketes eine treppenartige Konfiguration bilden.2. Disconnector according to claim 1, in which the contact fingers (27, 28) of each movable contact set (15, 16, 17) have the same length and are layered in two mutually opposite packages, characterized in that the inner and outer ends (37 , 38; 39, 40) of the contact fingers (27, 28) of each package form a step-like configuration. 3. Trennschalter nach Anspruch 2, bei dem das zweite Kontaktmesser (45, 46, 47) eine angeschrägte Eindringkan­te (45′) aufweist, die die äusseren Enden (39, 40) der Kontaktfinger (27, 28) im Zuge deren Eingriffbewegung auseinanderdrängt, dadurch gekennzeichnet, dass der freie Rand der Eindringkante (45′) im wesentlichen parallel zu der treppenförmigen Konfiguration der äusseren Enden (39, 40) der Kontaktfinger (27, 28) in Eingriffslage ist.3. Disconnector according to claim 2, wherein the second contact knife (45, 46, 47) has a bevelled penetration edge (45 ') which forces the outer ends (39, 40) of the contact fingers (27, 28) apart in the course of their engagement movement, characterized in that the free edge of the penetration edge (45 ') is substantially parallel to the stepped configuration of the outer ends (39, 40) of the contact fingers (27, 28) in the engagement position. 4. Trennschalter nach einem der vorangehenden Ansprü­che, mit je Phase einem dritten, ortsfesten und geerdeten Kontaktmesser (48) und bei dem die äusseren Enden (39, 40) der Kontaktfinger (27, 28) eine zum zugeordneten Kon­taktfinger des Paares sich erstreckende Erhebung aufwei­sen, dadurch gekennzeichnet, dass die freie Endkante des dritten Kontaktmessers (48) einen Wulst (49) aufweist, wobei die Kontaktfinger (27, 28) in Eingriffslage mit dem dritten Kontaktmesser (48) durch den Wulst (49) so weit auseiandergedrängt sind, dass die Erhebungen an den äus­seren Enden (39, 40) der Kontaktfinger (27, 28) vom wulstfreien Teil des dritten Kontaktmessers (48) abgeho­ben sind.4. Disconnect switch according to one of the preceding claims, each with a third, fixed and grounded contact knife (48) and in which the outer ends (39, 40) of the contact fingers (27, 28) have an elevation extending to the associated contact finger of the pair , characterized in that the free end edge of the third contact knife (48) has a bead (49), the contact fingers (27, 28) in the engagement position with the third contact knife (48) being so far apart by the bead (49) that the elevations on the outer ends (39, 40) of the contact fingers (27, 28) are lifted off the bead-free part of the third contact knife (48). 5. Trennschalter nach einem der Ansprüche 2 bis 4, bei dem die inneren Enden (37, 38) der Kontaktfinger (27, 28) eine zum zugeordneten Kontaktfinger des Paares sich erstreckende Erhebung aufweisen, dadurch gekennzeichnet, dass das erste, ortsfeste Kontaktmesser (l39, l40, l4l) an seinen Flachseiten inselartige, flache Erhebungen (50, 5l) aufweist, die gleichgerichtet sind, wie die inneren Enden (37, 38) der Kontaktfinger (27, 28), wenn deren äussere Enden (39, 40) mit dem zweiten (45, 46, 47) oder den dritten Kontaktmesser (48) in Eingriff sind.5. Disconnector according to one of claims 2 to 4, wherein the inner ends (37, 38) of the contact fingers (27, 28) have an elevation extending to the associated contact finger of the pair, characterized in that the first, fixed contact knife (l39 , l40, l4l) on its flat sides has island-like, flat elevations (50, 5l) which are oriented in the same way as the inner ends (37, 38) of the contact fingers (27, 28) if their outer ends (39, 40) are also the second (45, 46, 47) or the third contact knife (48) are engaged. 6. Trennschalter nach Anspruch 5, dadurch gekenn­zeichnet, dass die flachen Erhebungen (50, 5l) durch ram­penartige Schrägen umgeben sind.6. Disconnector according to claim 5, characterized in that the flat elevations (50, 5l) are surrounded by ramp-like slopes.
EP86112188A 1985-10-28 1986-09-03 Polyphase high tension isolating switch Expired EP0223939B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86112188T ATE45440T1 (en) 1985-10-28 1986-09-03 MULTI-PHASE HIGH VOLTAGE DISCONNECT SWITCH.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH462785 1985-10-28
CH4627/85 1985-10-28

Publications (2)

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EP0223939A1 true EP0223939A1 (en) 1987-06-03
EP0223939B1 EP0223939B1 (en) 1989-08-09

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EP86112188A Expired EP0223939B1 (en) 1985-10-28 1986-09-03 Polyphase high tension isolating switch

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EP (1) EP0223939B1 (en)
AT (1) ATE45440T1 (en)
DE (1) DE3664974D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114038705A (en) * 2021-11-10 2022-02-11 江苏大全凯帆开关股份有限公司 Reset device of isolating switch operating mechanism

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1432871A (en) * 1918-08-05 1922-10-24 Krantz Mfg Company Inc Switchboard mechanism
GB936141A (en) * 1958-12-19 1963-09-04 English Electric Co Ltd Improvements in and relating to contact systems for electrical switchgear
DE1202861B (en) * 1962-08-31 1965-10-14 Siemens Ag High current disconnector
CH519774A (en) * 1970-01-29 1972-02-29 Weber Ag Fab Elektro Contact head for a knife contact
DE2358105A1 (en) * 1973-11-21 1975-05-28 Siemens Ag Laminated contact socket for knife contacts - has narrow slot entrance and is shaped for even contact with inserted knife
DE3336770A1 (en) * 1983-05-13 1984-11-15 Sprecher & Schuh AG, Aarau, Aargau Multi-pole interrupter switch for a high-voltage switching installation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1432871A (en) * 1918-08-05 1922-10-24 Krantz Mfg Company Inc Switchboard mechanism
GB936141A (en) * 1958-12-19 1963-09-04 English Electric Co Ltd Improvements in and relating to contact systems for electrical switchgear
DE1202861B (en) * 1962-08-31 1965-10-14 Siemens Ag High current disconnector
CH519774A (en) * 1970-01-29 1972-02-29 Weber Ag Fab Elektro Contact head for a knife contact
DE2358105A1 (en) * 1973-11-21 1975-05-28 Siemens Ag Laminated contact socket for knife contacts - has narrow slot entrance and is shaped for even contact with inserted knife
DE3336770A1 (en) * 1983-05-13 1984-11-15 Sprecher & Schuh AG, Aarau, Aargau Multi-pole interrupter switch for a high-voltage switching installation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114038705A (en) * 2021-11-10 2022-02-11 江苏大全凯帆开关股份有限公司 Reset device of isolating switch operating mechanism
CN114038705B (en) * 2021-11-10 2022-12-02 江苏大全凯帆开关股份有限公司 Reset device of isolating switch operating mechanism

Also Published As

Publication number Publication date
EP0223939B1 (en) 1989-08-09
ATE45440T1 (en) 1989-08-15
DE3664974D1 (en) 1989-09-14

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