EP0576047B1 - High voltage switchgear - Google Patents

High voltage switchgear Download PDF

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Publication number
EP0576047B1
EP0576047B1 EP93114682A EP93114682A EP0576047B1 EP 0576047 B1 EP0576047 B1 EP 0576047B1 EP 93114682 A EP93114682 A EP 93114682A EP 93114682 A EP93114682 A EP 93114682A EP 0576047 B1 EP0576047 B1 EP 0576047B1
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EP
European Patent Office
Prior art keywords
contact
sliding
contacts
contact fingers
swivelling
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 - Lifetime
Application number
EP93114682A
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German (de)
French (fr)
Other versions
EP0576047A2 (en
EP0576047A3 (en
Inventor
Alfred Dr.-Ing. Hartig
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.)
Ruhrtal Elektrizitatsgesellschaft Hartig GmbH and Co
Original Assignee
Ruhrtal Elektrizitatsgesellschaft Hartig GmbH and Co
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Filing date
Publication date
Priority claimed from DE8904190U external-priority patent/DE8904190U1/de
Priority claimed from DE8904399U external-priority patent/DE8904399U1/de
Application filed by Ruhrtal Elektrizitatsgesellschaft Hartig GmbH and Co filed Critical Ruhrtal Elektrizitatsgesellschaft Hartig GmbH and Co
Publication of EP0576047A2 publication Critical patent/EP0576047A2/en
Publication of EP0576047A3 publication Critical patent/EP0576047A3/en
Application granted granted Critical
Publication of EP0576047B1 publication Critical patent/EP0576047B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/022—Details particular to three-phase circuit breakers
    • 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
    • H01H31/003—Earthing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0006—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches

Definitions

  • the invention relates to a high-voltage switching device, in particular an earthing switch, with at least two fixed contacts arranged next to one another, with switch contacts which can be swiveled in the swivel plane by means of swivel arms arranged in alignment in a swivel plane, and with a swivel drive which is common to all swivel arms, the fixed contacts each having a push-on contact have with a more or less transverse to the sliding arm, each switching contact has at least one pair of contact fingers and the contact fingers run on both sides of the sliding contact and then run adjacent to the sliding contact.
  • High-voltage switching devices of the type in question in particular those in the embodiment as an earthing switch. have long been known, for which reference is made to DE-C-24 09 527; the disclosure content of DE - C - 24 09 527 is hereby expressly made the disclosure content of the invention described here.
  • a multi-phase high-voltage switching device is known (cf. DE-A-28 10 453), the switch poles of which switch on or open at different times. This ensures that switching on or opening takes place in the best phase position in all phases.
  • the invention is therefore based on the object of designing and developing the known high-voltage switching device from which the invention is based, so that it is less powerful under otherwise identical conditions (especially with regard to the nominal voltage, the nominal current and the maximum permissible short-circuit current) Swivel drive gets by.
  • the high-voltage switching device in which the above-mentioned object is achieved, is characterized in that the different push-on contacts are designed to protrude to different extents from the push-on direction, so that the contact fingers of the different switch contacts when Closing in succession on the assigned slide-on contacts.
  • the swivel drive must be particularly powerful in the prior art because the opening of the contact fingers of the switching contacts and the sliding contacts, in contrast to the subsequent running along the sliding contacts, requires a high expenditure of force; the swivel drive must be designed in the prior art for the sum of all forces occurring at that moment.
  • the swivel drive must be designed to be considerably less powerful, since it is ensured that the contact fingers of the various switching contacts run onto the associated slide contacts not simultaneously but at the same time. This ensures that at the same time only the contact fingers of one switching contact run onto the associated sliding contact, while the contact fingers of the other switching contact or the other switching contacts either only run along the corresponding sliding contact or are not yet in contact with the sliding contact.
  • the high-voltage switching device shown in Fig. 1 is an earthing switch, the basic structure of which is initially three fixed contacts 1 and by means of Swivel arms 2 has switch contacts 3 which can be swiveled in a swivel plane and which can be pushed onto the fixed contacts 1.
  • the fixed contacts 1 each have a slide-on contact 4 with a slide-on stop 5 and a more or less transverse to the slide-on mounting arm 6.
  • the switching contacts 3 consist of two pairs of contact fingers 7, the contact fingers 7 running on both sides of the sliding contact 4 on closing and then running along the sliding contact 4 until the ends of the pairs of contact fingers 7 on the ones shown in FIG. 1 Slip stops 5 come to rest.
  • the slide-on contact 4 and the fastening arm 6 form an arcuate or angular component which lies in the pivoting plane of the switching contact.
  • the sliding contact 4 protrudes from the mounting arm 6 on one side in the sliding direction.
  • the area in which the contact fingers 7 of the switching contact 3 run onto the sliding contact 4 when closing is identified as the impact area 8 in FIG. 1.
  • the contact fingers 7 run onto the sliding contact 4 on both sides and are spread, albeit only slightly, so that a sufficient contact pressure is created at the current transition points. Subsequently, the contact fingers 7 slide along the slide-on contact 4, the contact pressure being maintained, but the force required to overcome the sliding friction is substantially less than the force which occurs when the contact fingers 7 run open at the start of the movement and spreading the contact fingers 7 is required.
  • the common swivel drive for the swivel arms 2a, 2b, 2c of the switch contact would therefore be dimensioned relatively easily. Based on this knowledge, the invention teaches that the contact fingers 7 of the various switching contacts 3 run in succession on the associated slide contacts 4 when closing.
  • the measure explained above can be implemented, for example, by the fastening arm 6 of the respective slide-on contact 4 having a different one Curved course and the slide contacts 4 are of correspondingly different lengths, so that the slide stops 5 of the various fixed contacts 1 are all aligned again.
  • the slide contacts 4 are often particularly expensive to manufacture, and on the other hand, because there may also be a need to retrofit existing high-voltage switching devices, it is now recommended as a particularly expedient solution for the previously explained teaching of the invention that the fixed contacts 1 fastened one to the slide contact 4 , have the actual contact and slide-on area for the contact fingers 7 forming the current path 9 and the current path 9 on the various slide-on contacts 4 are of different lengths.
  • the three current paths 9a, 9b and 9c for the three slide contacts 4 arranged here side by side are shown. 2 shows in top view the different lengths of the three current paths 9a, 9b, 9c on the swivel arms 2a, 2b, 2c.
  • the three slide-on contacts 4 are also extended in accordance with the current paths 9.
  • FIG. 3 shows very nicely how, in the case of synchronously moved swivel arms 2 with contact fingers 7, the contact fingers 7 run at different times onto the associated slide-on contacts 4 or onto the current paths 9a, 9b, 9c. 3 shows that the contact fingers 7 on the swivel arm 2a of the first earthing switch have just run onto the current path 9a of the corresponding slide-on contact 4, whereas the contact fingers 7 of the other two swivel arms 2b and 2c have before they run onto the corresponding current paths 9b and 9c stand.
  • the current paths 9 are plate-shaped and screwed onto the sliding contacts 4.
  • the current paths 9 could also be fastened to the sliding contacts 4 in any other way.
  • Fig. 3 finally shows that with two or more than two pairs of contact fingers 7 per switch contact 3, the longitudinal difference of the current paths 9a, 9b, 9c should correspond to the greatest distance between the contact fingers 7 in the pivot plane. This is particularly clear when comparing the positions of the contact fingers 7 of the two swivel arms 2a and 2b with respect to the current paths 9a and 9b.

Abstract

The switch appts. has three rotary breaker switches (1) and six earthing switches (2), each of which has a stationary contact (10) and a cooperating switch contact (12) attached to a pivot arm (11), rotated via a coupled drive shaft (14). The pivot arm mounting (13) and the drive shaft (14) are applicable to four different types of pivot cam (11). The pivot arm mounting (13) is formed from a flat material with the pivot arm (11) selectively attached to one or other side.

Description

Die Erfindung betrifft ein Hochspannungsschaltgerät, insbesondere einen Erdungsschalter, mit mindestens zwei nebeneinander angeordneten Festkontakten, mit mittels von in einer Schwenkebene fluchtend angeordneten Schwenkarmen in der Schwenkebene schwenkbaren, auf die Festkontakte aufschiebbaren Schaltkontakten und mit einem allen Schwenkarmen gemeinsamen Schwenkantrieb, wobei die Festkontakte jeweils einen Aufschiebekontakt mit einem mehr oder weniger quer zur Aufschieberichtung verlaufenden Befestigungsarm aufweisen, jeder Schaltkontakt mindestens ein Paar von Kontaktfingern besitzt und die Kontaktfinger beim Schließen beidseits auf den Aufschiebekontakt auflaufen und anschließend am Aufschiebekontakt anliegend entlanglaufen.The invention relates to a high-voltage switching device, in particular an earthing switch, with at least two fixed contacts arranged next to one another, with switch contacts which can be swiveled in the swivel plane by means of swivel arms arranged in alignment in a swivel plane, and with a swivel drive which is common to all swivel arms, the fixed contacts each having a push-on contact have with a more or less transverse to the sliding arm, each switching contact has at least one pair of contact fingers and the contact fingers run on both sides of the sliding contact and then run adjacent to the sliding contact.

Hochspannungsschaltgeräte der in Rede stehenden Art insbesondere solche in der Ausführungsform als Erdungschalter. sind seit längerem bekannt, wozu auf die DE - C - 24 09 527 verwiesen wird; der Offenbarungsgehalt der DE - C - 24 09 527 wird hiermit ausdrücklich zum Offenbarungsgehalt der hier beschriebenen Erfindung gemacht.High-voltage switching devices of the type in question, in particular those in the embodiment as an earthing switch. have long been known, for which reference is made to DE-C-24 09 527; the disclosure content of DE - C - 24 09 527 is hereby expressly made the disclosure content of the invention described here.

Im übrigen ist ein mehrphasiges Hochspannungsschaltgerät bekannt (vgl. die DE - A - 28 10 453), dessen Schalterpole zeitlich getrennt einschalten oder öffnen. Dadurch wird erreicht, daß in allen Phasen das Einschalten bzw. das Öffnen bei der günstigsten Phasenlage erfolgt.For the rest, a multi-phase high-voltage switching device is known (cf. DE-A-28 10 453), the switch poles of which switch on or open at different times. This ensures that switching on or opening takes place in the best phase position in all phases.

Nachteilig ist bei den bekannten Hochspannungsschaltgeräten, von denen die Erfindung ausgeht, daß der Schwenkantrieb relativ leistungsstark ausgeführt sein muß. Folglich liegt der Erfindung die Aufgabe zugrunde, das bekannte Hochspannungsschaltgerät, von dem die Erfindung ausgeht, so auszugestalten und weiterzubilden, daß es bei ansonsten gleichen Voraussetzungen (vor allem in bezug auf die Nennspannung, den Nennstrom und den maximal zulässigen Kurzschlußstrom) mit einem weniger leistungsstarken Schwenkantrieb auskommt.A disadvantage of the known high-voltage switching devices, from which the invention is based, that the swivel drive must be relatively powerful. The invention is therefore based on the object of designing and developing the known high-voltage switching device from which the invention is based, so that it is less powerful under otherwise identical conditions (especially with regard to the nominal voltage, the nominal current and the maximum permissible short-circuit current) Swivel drive gets by.

Das erfindungsgemäße Hochspannungsschaltgerät, bei dem die zuvor aufgezeigte Aufgabe gelöst ist, ist dadurch gekennzeichnet, daß die verschiedenen Aufschiebekontakte unterschiedlich weit entgegen der Aufschieberichtung vorspringend ausgebildet sind, so daß die Kontaktfinger der verschiedenen Schaltkontakte beim Schließen zeitlich nacheinander auf die zugeordneten Aufschiebekontakte auflaufen. Erfindungsgemäß ist erkannt worden, daß im Stand der Technik der Schwenkantrieb deshalb besonders leistungsstark ausgeführt sein muß, weil das Auflaufen der Kontaktfinger der Schaltkontakte und die Aufschiebekontakte, im Gegensatz zum anschließenden Entlanglaufen an den Aufschiebekontakten, einen hohen Kraftaufwand erfordert; der Schwenkantrieb muß im Stand der Technik auf die Summe aller in diesem Augenblick auftretenden Kräfte ausgelegt sein. Erfindungsgemäß ist nun erreicht, daß der Schwenkantrieb wesentlich weniger leistungsstark ausgelegt sein muß, da dafür gesorgt ist, daß das Auflaufen der Kontaktfinger der verschiedenen Schaltkontakte auf die zugeordneten Aufschiebekontakte nicht gleichzeitig, sondern zeitgleich versetzt erfolgt. Dadurch wird erreicht, daß zeitgleich stets nur gerade die Kontaktfinger eines Schaltkontaktes auf den zugehörigen Aufschiebekontakt auflaufen, während die Kontaktfinger des anderen Schaltkontaktes oder der anderen Schaltkontakte entweder nur noch am entsprechenden Aufschiebekontakt anliegend entlanglaufen oder mit dem Aufschiebekontakt überhaupt noch nicht in Berührung stehen.The high-voltage switching device according to the invention, in which the above-mentioned object is achieved, is characterized in that the different push-on contacts are designed to protrude to different extents from the push-on direction, so that the contact fingers of the different switch contacts when Closing in succession on the assigned slide-on contacts. According to the invention, it has been recognized that the swivel drive must be particularly powerful in the prior art because the opening of the contact fingers of the switching contacts and the sliding contacts, in contrast to the subsequent running along the sliding contacts, requires a high expenditure of force; the swivel drive must be designed in the prior art for the sum of all forces occurring at that moment. According to the invention it is now achieved that the swivel drive must be designed to be considerably less powerful, since it is ensured that the contact fingers of the various switching contacts run onto the associated slide contacts not simultaneously but at the same time. This ensures that at the same time only the contact fingers of one switching contact run onto the associated sliding contact, while the contact fingers of the other switching contact or the other switching contacts either only run along the corresponding sliding contact or are not yet in contact with the sliding contact.

Es gibt nun verschiedene Möglichkeiten, die zuvor erläuterte Lehre der Erfindung auszugestalten und weiterzubilden, wozu einerseits auf die dem Patentanspruch 1 nachgeordneten Patentansprüche, andererseits auf die Erläuterung eines bevorzugten Ausführungsbeispiels anhand der Zeichnung verwiesen werden darf. In der Zeichnung zeigt

Fig. 1
in einer Seitenansicht ein als Erdungsschalter ausgeführtes erfindungsgemäßes Hochspannungsschaltgerät,
Fig. 2
das Hochspannungsschaltgerät aus Fig. 1 in einer Ansicht von oben, teilweise weggebrochen, und
Fig. 3
ausschnittweise, in vergrößerter Darstellung, den eigentlichen Kontaktbereich des Hochspannungsschaltgerätes aus Fig. 1.
There are now various possibilities for embodying and developing the previously explained teaching of the invention, for which reference may be made on the one hand to the claims subordinate to claim 1 and on the other hand to the explanation of a preferred exemplary embodiment with reference to the drawing. In the drawing shows
Fig. 1
in a side view an inventive high-voltage switching device designed as an earthing switch,
Fig. 2
1 in a view from above, partially broken away, and
Fig. 3
Detail, in an enlarged view, the actual contact area of the high-voltage switching device from FIG. 1.

Das in Fig. 1 dargestellte Hochspannungsschaltgerät ist ein Erdungsschalter, der von seinem grundsätzlichen Aufbau her zunächst drei Festkontakte 1 und mittels von Schwenkarmen 2 in einer Schwenkebene schwenkbare, auf die Festkontakte 1 aufschiebbare Schaltkontakte 3 aufweist. Die Festkontakte 1 weisen jeweils einen Aufschiebekontakt 4 mit einem Aufschiebeanschlag 5 und einen mehr oder weniger quer zur Aufschieberichtung verlaufenden Befestigungsarm 6 auf. Die Schaltkontakte 3 bestehen im hier dargestellten Ausführungsbeispiel auf zwei Paaren von Kontaktfingern 7, wobei die Kontaktfinger 7 beim Schließen beidseits auf den Aufschiebekontakt 4 auflaufen und anschließend am Aufschiebekontakt 4 anliegend entlanglaufen, bis die Enden der Paare von Kontaktfingern 7 an den in Fig. 1 dargestellten Aufschiebeanschlägen 5 zur Anlage kommen.The high-voltage switching device shown in Fig. 1 is an earthing switch, the basic structure of which is initially three fixed contacts 1 and by means of Swivel arms 2 has switch contacts 3 which can be swiveled in a swivel plane and which can be pushed onto the fixed contacts 1. The fixed contacts 1 each have a slide-on contact 4 with a slide-on stop 5 and a more or less transverse to the slide-on mounting arm 6. In the exemplary embodiment shown here, the switching contacts 3 consist of two pairs of contact fingers 7, the contact fingers 7 running on both sides of the sliding contact 4 on closing and then running along the sliding contact 4 until the ends of the pairs of contact fingers 7 on the ones shown in FIG. 1 Slip stops 5 come to rest.

Wie insbesondere Fig. 1 zeigt, bilden der Aufschiebekontakt 4 und der Befestigungsarm 6 ein bogenförmiges bzw. winkelförmiges Bauteil, das in der Schwenkebene des Schaltkontaktes liegt. Der Aufschiebekontakt 4 ragt vom Befestigungsarm 6 in Aufschieberichtung einseitig vor. Der Bereich, in dem die Kontaktfinger 7 des Schaltkontaktes 3 beim Schließen auf den Aufschiebekontakt 4 auflaufen, ist als Auftreffbereich 8 in Fig. 1 kenntlich gemacht. (Sinn und Zweck dieser Ausgestaltung eines Hochspannungsschaltgerätes ist in der DE - C - 24 09 527 im einzelnen erläutert, weshalb hier nochmals auf den Offenbarungsgehalt dieser Patentschrift verwiesen wird.)As shown in FIG. 1 in particular, the slide-on contact 4 and the fastening arm 6 form an arcuate or angular component which lies in the pivoting plane of the switching contact. The sliding contact 4 protrudes from the mounting arm 6 on one side in the sliding direction. The area in which the contact fingers 7 of the switching contact 3 run onto the sliding contact 4 when closing is identified as the impact area 8 in FIG. 1. (The meaning and purpose of this embodiment of a high-voltage switching device is explained in detail in DE-C-24 09 527, which is why reference is again made to the disclosure content of this patent specification.)

Für den Ausgangspunkt der Erfindung wesentlich ist, daß nebeneinander mindestens zwei, im dargestellten Ausführungsbeispiel drei Festkontakte und an Schwenkarmen 2, nämlich an drei Schwenkarmen 2a, 2b und 2c schwenkbare Schaltkontakte 3 vorgesehen sind. In Fig. 1 ist nur der hinterste Schwenkarm 2c mit entsprechendem Schaltkontakt 3 eingezeichnet; gestrichelt eingezeichnet sind Teile, die zu den weiter vorne liegenden Schwenkarmen 2a und 2b gehören.For the starting point of the invention it is essential that at least two, in the exemplary embodiment shown three fixed contacts and on pivot arms 2, namely on three pivot arms 2a, 2b and 2c pivotable switching contacts 3 are provided next to each other. In Fig. 1, only the rearmost swivel arm 2c with corresponding switch contact 3 is shown; Parts that belong to the swivel arms 2a and 2b lying further in front are drawn in with dashed lines.

Beim Einschalten eines Hochspannungsschaltgerätes der in Rede stehenden Art laufen die Kontaktfinger 7 auf den Aufschiebekontakt 4 beidseits auf und werden dabei, wenn auch häufig nur geringfügig, gespreizt, so daß an den Stromübergangsstellen ein hinreichender Kontaktdruck geschaffen wird. Anschließend gleiten die Kontaktfinger 7 am Aufschiebekontakt 4 anliegend entlang, wobei zwar der Kontaktdruck aufrechterhalten wird, die zur Überwindung der Gleitreibung erforderliche Kraft aber wesentlich geringer ist als die Kraft, die beim Auflaufen der Kontaktfinger 7 zum Bewegungsbeginn und Aufspreizen der Kontaktfinger 7 erforderlich ist. Ohne weiteres wäre deshalb der gemeinsame Schwenkantrieb für die Schwenkarme 2a, 2b, 2c der Schaltkontakt relativ leistungsstark zu dimensionieren. Von dieser Erkenntnis ausgehend lehrt die Erfindung, daß die Kontaktfinger 7 der verschiedenen Schaltkontakte 3 beim Schließen zeitlich nacheinander auf die zugeordneten Aufschiebekontakte 4 auflaufen.When a high-voltage switching device of the type in question is switched on, the contact fingers 7 run onto the sliding contact 4 on both sides and are spread, albeit only slightly, so that a sufficient contact pressure is created at the current transition points. Subsequently, the contact fingers 7 slide along the slide-on contact 4, the contact pressure being maintained, but the force required to overcome the sliding friction is substantially less than the force which occurs when the contact fingers 7 run open at the start of the movement and spreading the contact fingers 7 is required. The common swivel drive for the swivel arms 2a, 2b, 2c of the switch contact would therefore be dimensioned relatively easily. Based on this knowledge, the invention teaches that the contact fingers 7 of the various switching contacts 3 run in succession on the associated slide contacts 4 when closing.

Dies wird dadurch erreicht, daß die Schwenkarme 2 bezüglich der Schwenkebene miteinander fluchtend angeordnet und vom Schwenkantrieb synchron angetrieben sind und die verschiedenen Aufschiebekontakte 4 unterschiedlich weit entgegen der Aufschieberichtung vorspringend ausgebildet sind.This is achieved in that the swivel arms 2 are aligned with one another with respect to the swivel plane and are driven synchronously by the swivel drive, and the various slide-on contacts 4 are designed to protrude to different extents from the slide-on direction.

Der wesentliche Kern dieser Lehre der Erfindung ist im allgemeinen Teil der Beschreibung schon erläutert worden, so daß sich hierzu an dieser Stelle weitere Ausführungen erübrigen.The essential essence of this teaching of the invention has already been explained in the general part of the description, so that further explanations are unnecessary at this point.

Die zuvor erläuterte Maßnahme läßt sich beispielsweise dadurch realisieren, daß der Befestigungsarm 6 des jeweiligen Aufschiebekontaktes 4 einen unterschiedlichen Bogenverlauf hat und die Aufschiebekontakte 4 entsprechend unterschiedlich lang sind, so daß die Aufschiebeanschläge 5 der verschiedenen Festkontakte 1 wieder alle miteinander fluchtend angeordnet sind.The measure explained above can be implemented, for example, by the fastening arm 6 of the respective slide-on contact 4 having a different one Curved course and the slide contacts 4 are of correspondingly different lengths, so that the slide stops 5 of the various fixed contacts 1 are all aligned again.

Einerseits, weil die Aufschiebekontakte 4 häufig besonders aufwendig herzustellen sind, andererseits, weil unter Umständen auch ein Nachrüstungsbedarf an bestehenden Hochspannungsschaltgeräten besteht, empfiehlt sich als besonders zweckmäßige Lösung für die zuvor erläuterte Lehre der Erfindung nun aber, daß die Festkontakte 1 eine am Aufschiebekontakt 4 befestigte, den eigentlichen Kontakt- und Aufschiebebereich für die Kontaktfinger 7 bildende Strombahn 9 aufweisen und die Strombahn 9 an den verschiedenen Aufschiebekontakten 4 unterschiedlich lang ausgebildet sind. Schon in Fig. 1 sind die drei Strombahnen 9a, 9b und 9c für die drei hier nebeneinander angeordneten Aufschiebekontakte 4 dargestellt. Fig. 2 läßt in Draufsicht die unterschiedliche Länge der drei Strombahnen 9a, 9b, 9c an den Schwenkarmen 2a, 2b, 2c erkennen. Im dargestellten Ausführungsbeispiel gilt dabei allerdings, daß auch die drei Aufschiebekontakte 4 entsprechend den Strombahnen 9 verlängert sind.On the one hand, because the slide contacts 4 are often particularly expensive to manufacture, and on the other hand, because there may also be a need to retrofit existing high-voltage switching devices, it is now recommended as a particularly expedient solution for the previously explained teaching of the invention that the fixed contacts 1 fastened one to the slide contact 4 , have the actual contact and slide-on area for the contact fingers 7 forming the current path 9 and the current path 9 on the various slide-on contacts 4 are of different lengths. Already in Fig. 1, the three current paths 9a, 9b and 9c for the three slide contacts 4 arranged here side by side are shown. 2 shows in top view the different lengths of the three current paths 9a, 9b, 9c on the swivel arms 2a, 2b, 2c. In the illustrated embodiment, however, the three slide-on contacts 4 are also extended in accordance with the current paths 9.

Fig. 3 zeigt sehr schön, wie bei synchron bewegten Schwenkarmen 2 mit Kontaktfingern 7 die Kontaktfinger 7 zeitlich versetzt auf die zugeordneten Aufschiebekontakte 4 bzw. auf die Strombahnen 9a, 9b, 9c auflaufen. Fig. 3 zeigt nämlich, daß hier gerade die Kontaktfinger 7 am Schwenkarm 2a des ersten Erdungsschalters auf die Strombahn 9a des entsprechenden Aufschiebekontakts 4 aufgelaufen sind, wohingegen die Kontaktfinger 7 der beiden anderen Schwenkarme 2b und 2c noch vor dem Auflaufen auf die entsprechenden Strombahnen 9b und 9c stehen.FIG. 3 shows very nicely how, in the case of synchronously moved swivel arms 2 with contact fingers 7, the contact fingers 7 run at different times onto the associated slide-on contacts 4 or onto the current paths 9a, 9b, 9c. 3 shows that the contact fingers 7 on the swivel arm 2a of the first earthing switch have just run onto the current path 9a of the corresponding slide-on contact 4, whereas the contact fingers 7 of the other two swivel arms 2b and 2c have before they run onto the corresponding current paths 9b and 9c stand.

Im dargestellten und insoweit bevorzugten Ausführungsbeispiel sind die Strombahnen 9 plattenförmig ausgeführt und an den Aufschiebekontakten 4 angeschraubt. Auch auf jede andere Weise könnten aber die Strombahnen 9 an den Aufschiebekontakten 4 befestigt sein.In the illustrated and preferred embodiment, the current paths 9 are plate-shaped and screwed onto the sliding contacts 4. However, the current paths 9 could also be fastened to the sliding contacts 4 in any other way.

Nicht dargestellt ist in der Zeichnung, daß die zuvor erwähnten Aufschiebeanschläge 5 natürlich auch an den Strombahnen 9 angeordnet sein können.It is not shown in the drawing that the aforementioned slide-on stops 5 can of course also be arranged on the current paths 9.

Fig. 3 läßt schließlich noch erkennen, daß bei zwei oder mehr als zwei Paaren von Kontaktfingern 7 je Schaltkontakt 3 der Längsunterschied der Strombahnen 9a, 9b, 9c dem größten Abstand der Kontaktfinger 7 in der Schwenkebene entsprechen sollte. Das macht insbesondere ein Vergleich der Positionen der Kontaktfinger 7 der beiden Schwenkarme 2a und 2b gegenüber den Strombahnen 9a und 9b deutlich.Fig. 3 finally shows that with two or more than two pairs of contact fingers 7 per switch contact 3, the longitudinal difference of the current paths 9a, 9b, 9c should correspond to the greatest distance between the contact fingers 7 in the pivot plane. This is particularly clear when comparing the positions of the contact fingers 7 of the two swivel arms 2a and 2b with respect to the current paths 9a and 9b.

Die Fig. 2 und 3 dienen nur schematisch der Erläuterung der Erfindung. Keinesfalls handelt es sich hier um Darstellungen, die Rückschlüsse auf die Dimensionen der Teile des erfindungsgemäßen Hochspannungsschaltgerätes zulassen. Insbesondere ist tatsächlich der Abstand zwischen den einzelnen Festkontakten 1 bzw. den einzelnen Schwenkarmen 2 und den davon getragenen Schaltkontakten 3 wesentlich größer, nämlich so groß, wie es die Netzspannung erfordert. In der Regel sind jeweils ein Festkontakt 1 und ein Schwenkarm 2 mit Schaltkontakt 3 funktionell zu einem Pol eines dreipoligen Hochspannungsschaltgerätes zusammengefaßt, wobei die drei Pole dann eine gemeinsame Grundkonstruktion und einen gemeinsamen Schwenkantrieb haben.2 and 3 serve only schematically to explain the invention. In no case are these representations which allow conclusions to be drawn about the dimensions of the parts of the high-voltage switching device according to the invention. In particular, the distance between the individual fixed contacts 1 or the individual swivel arms 2 and the switch contacts 3 carried by them is actually much larger, namely as large as the mains voltage requires. As a rule, a fixed contact 1 and a swivel arm 2 with switch contact 3 are functionally combined to form a pole of a three-pole high-voltage switching device, the three poles then having a common basic construction and a common swivel drive.

Claims (5)

  1. A high-voltage switching device, particularly an earthing switch, having at least two fixed contacts disposed side by side, having switching contacts which can slide on to the fixed contacts and which can swivel in a plane of swivelling by means of two swivelling arms which are disposed aligned in the plane of swivelling, and having a swivelling drive which is common to all the swivelling arms, wherein the fixed contacts each have a sliding contact with a fixing arm extending more or less transversely to the direction of sliding, each switching contact has at least one pair of contact fingers, the contact fingers run on to the sliding contact on both sides on closure and subsequently run along the sliding contact seated against the latter, characterised in that the different sliding contacts (4) are constructed so that they project by different extents opposite to the direction of sliding, so that on closure the contact fingers (7) of the different switching contacts (3) run on to the associated sliding contacts (4) chronologically in succession.
  2. A high-voltage switching device according to claim 1, characterised in that the fixed contacts (1) comprise a current path (9) which is fixed to the sliding contact (4) and which forms the actual contact and sliding region for the contact fingers (7), and the current paths (9) on the different sliding contacts (4) are constructed with different lengths.
  3. A high-voltage switching device according to claim 2, characterised in that the current paths (9) are of plate-shaped construction and are screwed on to the sliding contacts (4).
  4. A high-voltage switching device according to claim 2 or 3, wherein at least one slide stop for the contact fingers is disposed on each sliding contact, characterised in that the slide stop is disposed on the current path.
  5. A high-voltage switching device according to any one of claims 1 to 4, wherein two or more than two pairs of contact fingers are provided per switching contact, characterised in that the distance between the front edges of the sliding contacts, particularly the difference in length of the current paths (9), corresponds to the greatest distance between the contact fingers (7) of a switching contact (3) in the plane of swivelling.
EP93114682A 1989-04-05 1990-04-03 High voltage switchgear Expired - Lifetime EP0576047B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE8904190U DE8904190U1 (en) 1989-04-05 1989-04-05
DE8904190U 1989-04-05
DE8904399U 1989-04-07
DE8904399U DE8904399U1 (en) 1989-04-07 1989-04-07
EP90106352A EP0391339B1 (en) 1989-04-05 1990-04-03 High voltage switch gear

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP90106352A Division EP0391339B1 (en) 1989-04-05 1990-04-03 High voltage switch gear
EP90106352.9 Division 1990-04-03

Publications (3)

Publication Number Publication Date
EP0576047A2 EP0576047A2 (en) 1993-12-29
EP0576047A3 EP0576047A3 (en) 1994-05-18
EP0576047B1 true EP0576047B1 (en) 1996-12-04

Family

ID=25954620

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Application Number Title Priority Date Filing Date
EP93114682A Expired - Lifetime EP0576047B1 (en) 1989-04-05 1990-04-03 High voltage switchgear
EP90106352A Expired - Lifetime EP0391339B1 (en) 1989-04-05 1990-04-03 High voltage switch gear

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP90106352A Expired - Lifetime EP0391339B1 (en) 1989-04-05 1990-04-03 High voltage switch gear

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EP (2) EP0576047B1 (en)
AT (2) ATE126925T1 (en)
DE (2) DE59009543D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102983035B (en) * 2012-11-21 2015-01-28 正泰电气股份有限公司 Three phase earthing switch structure driven by duplex pull rods and distributed in I shape
RU209672U1 (en) * 2021-10-04 2022-03-18 Общество с ограниченной ответственностью "Белгородский электромеханический завод" (ООО "БЭМЗ") LINE DISCONNECTOR FOR OUTDOOR INSTALLATION WITH TWO POST-INSULATION COLUMNS

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH339645A (en) * 1957-11-15 1959-07-15 Gardy Particip App Earthing device
DE1095351B (en) * 1958-12-17 1960-12-22 Siemens Ag Earthing switch
DE2351492C3 (en) * 1973-10-13 1982-02-18 Ruhrtal Elektrizitätsgesellschaft Hartig GmbH & Co, 4300 Essen High voltage switchgear
DE2628020A1 (en) * 1976-06-23 1977-12-29 Bbc Brown Boveri & Cie Short circuit stabiliser for earth conductor - has stationary contact with current loop whose electrodynamic moment affects free end of moving contact
DE3412203A1 (en) * 1983-04-02 1985-10-03 Ruhrtal Elektrizitätsgesellschaft Hartig GmbH & Co, 4300 Essen Switching apparatus for high-voltage switching installations
DE3513908A1 (en) * 1985-04-17 1986-10-23 Ruhrtal Elektrizitätsgesellschaft Hartig GmbH & Co, 4300 Essen OUTLET SWITCHGEAR FOR HIGH VOLTAGE SWITCHGEAR
SE457582B (en) * 1987-04-09 1989-01-09 Asea Ab Triple High Voltage Switch

Also Published As

Publication number Publication date
ATE146009T1 (en) 1996-12-15
ATE126925T1 (en) 1995-09-15
DE59009543D1 (en) 1995-09-28
EP0576047A2 (en) 1993-12-29
EP0576047A3 (en) 1994-05-18
EP0391339A3 (en) 1991-10-16
DE59010593D1 (en) 1997-01-16
EP0391339A2 (en) 1990-10-10
EP0391339B1 (en) 1995-08-23

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