EP0223939B1 - Polyphase high tension isolating switch - Google Patents

Polyphase high tension isolating switch Download PDF

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Publication number
EP0223939B1
EP0223939B1 EP86112188A EP86112188A EP0223939B1 EP 0223939 B1 EP0223939 B1 EP 0223939B1 EP 86112188 A EP86112188 A EP 86112188A EP 86112188 A EP86112188 A EP 86112188A EP 0223939 B1 EP0223939 B1 EP 0223939B1
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EP
European Patent Office
Prior art keywords
contact
contact fingers
fingers
outer ends
isolating switch
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.)
Expired
Application number
EP86112188A
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German (de)
French (fr)
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EP0223939A1 (en
Inventor
Peter Hunziker
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.)
General Electric Switzerland GmbH
Original Assignee
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
Application granted granted Critical
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 I.
  • Such a circuit breaker is known for example from DE-A 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 that are inevitable on the contact blades, 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 proposed disconnector has the features specified in the characterizing part of the patent claim.
  • 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 unit accommodated in a metal encapsulation 11.
  • a metal encapsulation 11 In the metal encapsulation 11, three tubular busbars 12, 13 and 14 are arranged, which in FIG. 1 run at right angles to the plane of the drawing.
  • the disconnector 10 has three movable contact sets 15, 16 and 17, which are identical among themselves. Each of the contact sets 15, 16 and 17 is held in a continuous recess 18, 19 and 20 in a common carrier body 21 made of an insulating material in a manner to be described.
  • the carrier body 21 On one end, the carrier body 21 has a stub shaft 22 which is rotatably mounted in a bearing insert 23 fastened in the metal encapsulation II. At the other end, the carrier body 21 ends in a drive shaft 24, which is guided gas-tight out of the metal encapsulation II through a bushing 25 and is coupled there to a rotary drive, not shown.
  • the axis of rotation or swivel axis 26 of the carrier body 21 is indicated in FIG. 1 by a dash-dotted line and in FIG. 2 by a dot.
  • the carrier body 21 is cranked in the region of the recesses 18-20 in the manner of a crankshaft.
  • Each of the contact sets 15 - 17 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, 31 screwed together with bolts 29 '(FIG. 2), which hold the middle, laterally projecting legs of the contact fingers 27, 28 between them.
  • the ends of the brackets 30, 31 protruding from the packets of the contact fingers 27, 28 are kinked, so that these brackets, as seen in FIG. 2, have the shape of an elongated S.
  • a molded projection 32, 33 extends from the inner wall of the recesses 18, 19, 20, these two projections only for the recess 18 in FIG. 2 are shown.
  • FIG. 3 In order to the packages of the contact fingers 27 and 28 (if the play between the ends of the brackets 30, 31 and the projections 32, 33 are not taken into account) are positively coupled to the carrier body 21 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 15, 16, 17.
  • this pipe stub there are recesses 35, 36 (dashed lines in FIG. I) for the passage of the bent ends of the brackets 30, 31.
  • 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 15, 16 and 17 are in constant engagement with one and the other flat side of a first fixed contact knife 139, 140 and 141, respectively.
  • Each of these contact knives is via an insulating feedthrough 42 , 43 or 44 led out of the encapsulation II and galvanically connected there, for example with a cable outlet (not shown).
  • the outer ends 39, 40 of the contact fingers 27, 28 of each of the contact sets 15, 16 and 17 are in the position shown in FIG. I and in the extended position in FIG. 2 in engagement with a second contact knife 45, 46 and 47, each of these Contact knife starts from one of the busbars 12, 13 and 14 and is welded to this, for example.
  • the second contact blades 45-47 are parallel to one another and extend in the direction of the contact sets 15-17, their free contours (in FIG. I) being congruent.
  • the second contact knife 45 (and likewise the second contact knife 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 parallel to the "step-like configuration" of the outer ends 39, 40 of the contact fingers 27, 28 in essence, when these are in engagement with the contact knife in question.
  • the consequence of this shaping of the penetrating edge 45 ' is that each outer end 39, 40 not only leaves its "own” grinding track on the corresponding flat side of the contact blades 45 - 47, 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 assigned second 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 21 and thus the contact sets 15-17 can be rotated further clockwise from the “OFF” position denoted by 15 ′ 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 denoted by 15 " the outer ends 39, 40 of the contact fingers 27, 28 are pushed apart when they are about to come into engagement with the third contact knife 48.
  • this penetrating edge 48 ' is directed radially with respect to the pivot axis 26, so that during a switching stroke into the earthed one Position 25 "the outer ends 39, 40 are pushed apart one after the other.
  • a third bead 49 adjoins the third contact knife 48, which pushes the outer ends 39, 40 further apart, so that they disengage from the flat sides adjoining the bead 49 of the third contact knife 48.
  • the third contact knife 48 is in contact via its bulge 49 with the "shafts" of the contact fingers 47 and 48 adjoining 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, whereby on each flat side of the contact knives 139-141 these circular arcs each have the same radius and the same length exhibit.
  • the grinding marks created in this way do not overlap.
  • the contact blades 139-141 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 15 "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 139-141 have flat elevations 50, 51 which are delimited by beveled ramps, which intersect and whose course the step-like configuration of the inner ends 37, 38 of the switching fingers 27, 28 in the corresponds to the two switching positions mentioned.
  • the switch-off position 15 ' only a small number of the inner ends 37, 38 of the contact fingers exercise.
  • NEN contact pressure namely the inner ends closest to the pivot axis 26, while the other inner ends 37, 38 rest, so to speak, without pressure on the flat sides of the first contact knife 139 or 140, 141.
  • the contact point of each of the inner ends 37, 38 with the associated contact knife 139-141 is indicated with a small circle, this circle in no way representing a depression or an elevation.

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 I.The present invention relates to a multi-phase high-voltage disconnector according to the preamble of claim I.

Ein solcher Trennschalter ist beispielsweise aus der DE-A 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-A 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 that are inevitable on the contact blades, 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 angegebenen Merkmale auf.For this purpose, the proposed disconnector has the features specified in the characterizing part of the patent claim.

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. 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 11-11 der Fig. I,
  • Fig. 3 in grösserem Massstab eine Einzelheit im Schnitt längs der Linie 111-111 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 11-11 of FIG. I,
  • 3 shows a detail on a larger scale along the line 111-111 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 10 ist Teil einer in einer Metallkapselung 11 untergebrachten, gasisolierten Hochspannungsschaltanlage. In der Metallkapselung 11 sind drei rohrförmige Sammelschienen 12, 13 und 14 angeordnet, die in Fig. 1 rechtwinklig zur Zeichenebene verlaufen.The isolating switch 10 shown is part of a gas-insulated high-voltage switchgear unit accommodated in a metal encapsulation 11. In the metal encapsulation 11, three tubular busbars 12, 13 and 14 are arranged, which in FIG. 1 run at right angles to the plane of the drawing.

Der Trennschalter 10 weist drei bewegliche Kontaktsätze 15, 16 und 17 auf, die unter sich gleich ausgebildet sind. Jeder der Kontaktsätze 15, 16 und 17 ist in einer durchgehenden Ausnehmung 18, 19 und 20 in einem gemeinsamen Trägerkörper 21 aus einem Isoliermaterial auf noch zu beschreibende Weise gehaltert.The disconnector 10 has three movable contact sets 15, 16 and 17, which are identical among themselves. Each of the contact sets 15, 16 and 17 is held in a continuous recess 18, 19 and 20 in a common carrier body 21 made of an insulating material in a manner to be described.

Einerends weist der Trägerkörper 21 einen Wellenstumpf 22 auf, der in einem in der Metallkapselung II befestigten Lagereinsatz 23 drehbar gelagert ist. Andernends endet der Trägerkörper 21 in einer Antriebswelle 24, die durch eine Durchführungshülse 25 gasdicht aus der Metallkapselung II herausgeführt ist und dort an einen nicht dargestellten Drehantrieb gekoppelt ist. Die Dreh- oder Schwenkachse 26 des Trägerkörpers 21 ist in Fig. 1 mit einer strichpunktierten Linie und in Fig. 2 mit einem Punkt angedeutet.On one end, the carrier body 21 has a stub shaft 22 which is rotatably mounted in a bearing insert 23 fastened in the metal encapsulation II. At the other end, the carrier body 21 ends in a drive shaft 24, which is guided gas-tight out of the metal encapsulation II through a bushing 25 and is coupled there to a rotary drive, not shown. The axis of rotation or swivel axis 26 of the carrier body 21 is indicated in FIG. 1 by a dash-dotted line and in FIG. 2 by a dot.

Aus Fig. I ist ersichtlich, dass der Trägerkörper 21 im Bereich der Ausnehmungen 18 - 20 in der Art einer Kurbelwelle gekröpft ist.I can see that the carrier body 21 is cranked in the region of the recesses 18-20 in the manner of a crankshaft.

Jeder der Kontaktsätze 15 - 17 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, 31, 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, 31 sind abgeknickt, so dass diese Bügel, in Fig. 2 gesehen, die Form etwa eines gestreckten S aufweisen. Zwischen diese abgeknickten Enden der Bügel 30, 31 erstreckt sich mit etwas Spiel je ein angeformter, von der Innenwand der Ausnehmungen 18, 19, 20 nach innen sich erstreckender Vorsprung 32, 33, wobei diese beiden Vorsprünge nur für die Ausnehmung 18 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, 31 und den Vorsprüngen 32, 33 unberücksichtigt) sowohl in radialer Richtung als auch in Drehrichtung formschlüssig an den Trägerkörper 21 gekoppelt. Die Blattfedern 29 sind an der Innenwand eines Vierkant-Rohrstummels 34 abgestützt, der jeweils einen der Kontaktsätze 15, 16, 17 umschliesst. In diesem Rohrstummel sind Aussparungen 35, 36 (gestrichelt in Fig. I) zum Durchlass der abgeknickten Enden der Bügel 30, 31 vorhanden.Each of the contact sets 15 - 17 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, 31 screwed together with bolts 29 '(FIG. 2), which hold the middle, laterally projecting legs of the contact fingers 27, 28 between them. The ends of the brackets 30, 31 protruding from the packets of the contact fingers 27, 28 are kinked, so that these brackets, as seen in FIG. 2, have the shape of an elongated S. Between these bent ends of the brackets 30, 31, with a little play, a molded projection 32, 33 extends from the inner wall of the recesses 18, 19, 20, these two projections only for the recess 18 in FIG. 2 are shown. In this context, reference should also be made to FIG. 3. In order to the packages of the contact fingers 27 and 28 (if the play between the ends of the brackets 30, 31 and the projections 32, 33 are not taken into account) are positively coupled to the carrier body 21 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 15, 16, 17. In this pipe stub there are recesses 35, 36 (dashed lines in FIG. I) for the passage of the bent ends of the brackets 30, 31.

Die in Fig. I unten erscheinenden, seitlich abstehenden Schenkel der Kontaktfinger 27, 28 bilden deren innere Enden 37, 38, während die in Fig. 1 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 15, 16 und 17 sind in stetem Eingriff mit der einen und anderen Flachseite je eines ersten ortsfesten Kontaktmessers 139, 140 bzw. 141. Jedes dieser Kontaktmesser ist über eine isolierende Durchführung 42, 43 bzw. 44 aus der Kapselung II herausgeführt und dort galvanisch beispielsweise mit einem Kabelabgang (nicht dargestellt) verbunden. Die äusseren Enden 39, 40 der Kontaktfinger 27, 28 jedes der Kontaktsätze 15, 16 und 17 stehen in der in Fig. I 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 12, 13 bzw. 14 ausgeht und an dieser beispielsweise angeschweisst ist. Die zweiten Kontaktmesser 45 - 47 sind parallel zueinander und erstrecken sich in Richtung zu den Kontaktsätzen 15 - 17 hin, wobei deren freie Konturen (in Fig. I) deckungsgleich sind.The inner ends 37, 38 of the contact fingers 27, 28 of each of the contact sets 15, 16 and 17 are in constant engagement with one and the other flat side of a first fixed contact knife 139, 140 and 141, respectively. Each of these contact knives is via an insulating feedthrough 42 , 43 or 44 led out of the encapsulation II and galvanically connected there, for example with a cable outlet (not shown). The outer ends 39, 40 of the contact fingers 27, 28 of each of the contact sets 15, 16 and 17 are in the position shown in FIG. I and in the extended position in FIG. 2 in engagement with a second contact knife 45, 46 and 47, each of these Contact knife starts from one of the busbars 12, 13 and 14 and is welded to this, for example. The second contact blades 45-47 are parallel to one another and extend in the direction of the contact sets 15-17, their free contours (in FIG. I) being congruent.

Zurückkommend auf die Kontaktsätze 15 - 17 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 31 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 15' bezeichnete "AUS"-Stellung verdreht wird.Returning to the contact sets 15-17, it can be seen in particular in FIG. 2 that because of the unequal spacing of the projections 32 and 33 from the pivot axis 26 and because of the obliquely angled course of the brackets 30 and 31 with respect to the longitudinal extent of the bent ends Contact fingers 27, 28, the outer ends 39, 40 of which give the packages of these contact fingers a "step-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 rotated with 15 'designated "OFF" position.

Man erkennt ferner aus Fig. 2, dass das zweite Kontaktmesser 45 (und genauso auch die zweiten 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 zweite 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 second contact knife 45 (and likewise the second contact knife 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 parallel to the "step-like configuration" of the outer ends 39, 40 of the contact fingers 27, 28 in essence, when these are in engagement with the contact knife in question. The consequence of this shaping of the penetrating edge 45 'is that each outer end 39, 40 not only leaves its "own" grinding track on the corresponding flat side of the contact blades 45 - 47, 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 assigned second 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 21 und damit die Kontaktsätze 15 - 17 aus der in Fig. 2 mit 15' 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 15" 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 dritten 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 dritten 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 dritten Kontaktmessers 48 gelangen. In der geerdeten Schaltstellung steht somit das dritte 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 21 and thus the contact sets 15-17 can be rotated further clockwise from the “OFF” position denoted by 15 ′ 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 denoted by 15 " the outer ends 39, 40 of the contact fingers 27, 28 are pushed apart when they are about to come into engagement with the third contact knife 48. However, this penetrating edge 48 'is directed radially with respect to the pivot axis 26, so that during a switching stroke into the earthed one Position 25 "the outer ends 39, 40 are pushed apart one after the other. At the penetrating edge 48 ', a third bead 49 (see also FIG. 4) adjoins the third contact knife 48, which pushes the outer ends 39, 40 further apart, so that they disengage from the flat sides adjoining the bead 49 of the third contact knife 48. In the grounded switching position, the third contact knife 48 is in contact via its bulge 49 with the "shafts" of the contact fingers 47 and 48 adjoining 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 139, 140 und 141 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 139 - 141 diese Kreisbogen paarweise jeweils denselben Radius und dieselbe Länge aufweisen. Die dadurch erzeugten Schleifspuren überdecken sich indessen nicht.On the contact knives 139, 140 and 141, 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, whereby on each flat side of the contact knives 139-141 these circular arcs each have the same radius and the same length exhibit. However, the grinding marks created in this way do not overlap.

Um aber die Abnützung auch der inneren Enden 37, 38 der Kontaktfinger 27, 28 zu vermindern, sind die Kontaktmesser 139 - 141 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 15" bezeichneten und strichpunktiert dargestellten geerdeten Stellung. Die inneren Enden 37, 38 der Kontaktfinger bilden ebenfalls eine treppenartige Konfiguration. An den beiden Flachseiten der Messerkontakte 139 - 141 sind flache, durch angeschrägte Rampen begrenzte Erhebungen 50, 51 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 15' übt somit nur die Minderzahl der inneren Enden 37, 38 der Kontaktfinger ei- . nen 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 139 bzw. 140, 141 aufliegen. In Fig. 5 ist die Kontaktstelle jedes der inneren Enden 37, 38 mit dem zugeordneten Kontaktmesser 139 - 141 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 139-141 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 15 "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 139-141 have flat elevations 50, 51 which are delimited by beveled ramps, which intersect and whose course the step-like configuration of the inner ends 37, 38 of the switching fingers 27, 28 in the corresponds to the two switching positions mentioned. In the switch-off position 15 ', only a small number of the inner ends 37, 38 of the contact fingers exercise. NEN contact pressure, namely the inner ends closest to the pivot axis 26, while the other inner ends 37, 38 rest, so to speak, without pressure on the flat sides of the first contact knife 139 or 140, 141. 5, the contact point of each of the inner ends 37, 38 with the associated contact knife 139-141 is indicated with a small circle, this circle in no way representing a depression or an elevation.

Es wurde bereits erwähnt, dass die Kontaktsätze 15, 16, 17 sowohl in radialer als auch in Drehrichtung formschlüssig, jedoch mit etwas Spiel an den Trägerköprer 21 gekoppelt sind. Dieses Spiel dient dazu, geringe Fluchtungsfehler zwischen den zweiten Kontaktmessern 45 - 47 und den ersten Kontaktmessern 139 - 141 sowie den dritten Kontaktmessern 48 auszugleichen.It has already been mentioned that the contact sets 15, 16, 17 are positively connected to the carrier body 21 both in the radial direction and in the direction of rotation, but with some play. This game serves to compensate for slight misalignments between the second contact blades 45-47 and the first contact blades 139-141 and the third contact blades 48.

Claims (6)

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.
2. An isolating switch according to claim 1, in which the contact fingers (27, 28) of each movable contact bank (15, 16, 17) have the same length and are stacked in two oppositely disposed sets, characterised in that the inner and outer ends (37, 38; 39, 40) of the contact fingers (27, 28) of each set form a step-like configuration.
3. An isolating switch according to claim 2, in which the second contact blade (45, 46, 47) comprises a chamfered penetration edge (45'), which forces the outer ends (39, 40) of the contact fingers (27, 28) apart during their engagement movement, characterised in that the free rim of the penetration edge (45') is substantially parallel to the step-shaped configuration of the outer ends (39, 40) of the contact fingers (27, 28) in the engaged position.
4. An isolating switch according to any one of the preceding claims, comprising a third stationary and earthed contact blade (48) per phase and in which the outer ends (39, 40) of the contact fingers (27, 28) comprise a raised portion extending as far as the associated contact finger of the pair, characterised in that the free end edge of the third contact blade (48) comprises a reinforcement (49), the contact fingers (27, 28) being forced apart by the reinforcement (49) in the position of engagement with the third contact blade (48) to such an extent that the raised portions at the outer ends (39, 40) of the contact fingers (27, 28) are lifted from the non-reinforced part of the third contact blade (48).
5. An isolating switch according to one of claims 2 to 4, in which the inner ends (37, 38) of the contact fingers (27, 28) comprise a raised portion extending as far as the associated contact finger of the pair, characterised in that the first stationary contact blade (139, 140, 141) comprises on its flat sides island-like flat raised portions (50, 51), which are unidirectional, like the inner ends (37, 38) of the contact fingers (27, 28), when the latter's outer ends (39, 40) engage with the second (45, 46, 47) or third contact blade (48).
6. An isolating switch according to claim 5, characterised in that the flat raised portions (50, 51) are surrounded by ramp-like inclinations.
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)

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

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ID=4279666

Family Applications (1)

Application Number Title Priority Date Filing Date
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)

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Publication number Priority date Publication date Assignee Title
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

Family Cites Families (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
CH659913A5 (en) * 1983-05-13 1987-02-27 Sprecher & Schuh Ag MULTIPOLE DISCONNECTOR FOR A HIGH VOLTAGE SWITCHGEAR.

Also Published As

Publication number Publication date
EP0223939A1 (en) 1987-06-03
ATE45440T1 (en) 1989-08-15
DE3664974D1 (en) 1989-09-14

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