EP2016603B1 - Power switch, especially high-current switch - Google Patents

Power switch, especially high-current switch Download PDF

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Publication number
EP2016603B1
EP2016603B1 EP07728883.5A EP07728883A EP2016603B1 EP 2016603 B1 EP2016603 B1 EP 2016603B1 EP 07728883 A EP07728883 A EP 07728883A EP 2016603 B1 EP2016603 B1 EP 2016603B1
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EP
European Patent Office
Prior art keywords
pole
insulating body
circuit breaker
power switch
unit
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.)
Active
Application number
EP07728883.5A
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German (de)
French (fr)
Other versions
EP2016603A1 (en
Inventor
Ralf-Peter Kurth
Clemens RÜTHNICK
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.)
Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2016603A1 publication Critical patent/EP2016603A1/en
Application granted granted Critical
Publication of EP2016603B1 publication Critical patent/EP2016603B1/en
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Anticipated expiration legal-status Critical

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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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • 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
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring

Definitions

  • the invention relates to a circuit breaker, in particular a high-current switch, having at least one pole unit with a pole head and a pole carrier and a contact system arranged therebetween, and a drive unit for initiating a switching movement in a moving contact of the contact system, each pole head and each pole carrier of the pole unit each by means of a support means are attached with two juxtaposed support elements on a retaining wall of the circuit breaker.
  • Such a circuit breaker is known for example from the Siemens publication "Siemens HG 11.11, 1999".
  • the high-current switch disclosed there as a circuit breaker comprises three pole units, each having a pole head and a pole carrier, and a drive unit for initiating a switching movement into a moving contact of a contact system of the respective pole unit.
  • Each pole head and each pole carrier with the contact system arranged therebetween are fastened to a retaining wall of the circuit breaker by means of two support elements arranged next to one another.
  • two mutually adjacent support elements are provided for pole head and pole carrier in order to ensure sufficient stability in the large transverse forces due to the high currents to the pole units.
  • Another power switch which has a one-piece receiving device for the pole unit, is from the WO 02/39557 known.
  • Object of the present invention is to develop a circuit breaker of the type mentioned, which has improved stability and insulation properties in a structurally simple construction.
  • both the support means of the pole head and the support means of the pole carrier instead of the two support elements comprise a single integrally formed insulating body.
  • the support means comprises a metal retaining plate, which is fastened on the one hand to the insulating body and on the other hand to the retaining wall.
  • a metal retaining plate is a simple way of fastening the insulating body realized on the retaining wall of the circuit breaker with distribution of mechanical stress.
  • fastening elements for fastening the insulating body to the pole unit are provided in the insulating body of the metallic retaining plate opposite.
  • FIG. 1 shows a high-current switch as a circuit breaker for high current applications in a cross-sectional view.
  • the circuit breaker 1 comprises three pole units for the three phases of an alternating current to be switched, of which only one polar unit is shown in FIG. 2.
  • the pole unit 2 comprises a pole head 3 and a pole carrier 4, between which a contact system 5 in the form of a vacuum interrupter 5 for switching a current between a first terminal 6 of the pole head 3 and a second terminal 7 of the pole carrier 4 is arranged.
  • a moving contact 8 the vacuum interrupter 5 is coupled via a drive linkage 9 to a drive unit 10 of the circuit breaker, wherein the drive unit 10 is designed to initiate a switching movement in the moving contact 8 of the contact system 5.
  • the pole unit 2 is secured by means of support means 11 and 12 and holding devices 13 and 14, respectively, to a retaining wall 15 of the circuit breaker.
  • the support means 11 and 12 are used for electrical insulation of the pole unit 2 relative to the retaining wall 15 and the drive unit 10 of the circuit breaker and for mechanical stabilization of the entire arrangement.
  • FIG. 2 shows a cross-sectional view of the support device 11 from FIG. 1 wherein the support means 12 has the same construction.
  • the support device 11 comprises a one-piece insulating body 16 with an oval formation made of cast resin, which by means of two juxtaposed screw 17, 18 on the pole unit 2 from FIG. 1 is fastened, and two juxtaposed screw 19 and 20 is fixed to a metallic support plate 21, which in turn is screwed by means of a fastening means 22 in the form of a screw with the holding device 13 of the circuit breaker.
  • the insulating body 16 has in the exemplary embodiment an oval cross-section with an approximately twice as long longitudinal extent compared to its transverse extent and is also on its outside with circumferential ribs 23 provided, which serve to increase the tracking resistance of the insulator.
  • FIG. 3 shows a perspective view of the insulating body and the support means 11 of FIG. 2 in which in particular the circumferential ribs 23 can be seen, as well as the attachment of the metallic support plate 21 through the screw 19 and 20 of the insulator. From the metal retaining plate out the screw 22 extends to attach the support means to the retaining wall of the circuit breaker.

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Description

Die Erfindung betrifft einen Leistungsschalter, insbesondere einen Hochstromschalter, mit mindestens einer Poleinheit mit einem Polkopf und einem Polträger und einem dazwischen angeordneten Kontaktsystem sowie einer Antriebseinheit zur Einleitung einer Schaltbewegung in einen Bewegkontakt des Kontaktsystems, wobei jeder Polkopf und jeder Polträger der Poleinheit jeweils mittels einer Stützeinrichtung mit zwei nebeneinander angeordneten Stützelementen an einer Haltewand des Leistungsschalter befestigt sind.The invention relates to a circuit breaker, in particular a high-current switch, having at least one pole unit with a pole head and a pole carrier and a contact system arranged therebetween, and a drive unit for initiating a switching movement in a moving contact of the contact system, each pole head and each pole carrier of the pole unit each by means of a support means are attached with two juxtaposed support elements on a retaining wall of the circuit breaker.

Ein derartiger Leistungsschalter ist beispielsweise aus der Siemens Druckschrift "Siemens HG 11.11, 1999" bekannt. Der dort offenbarte Hochstromschalter als Leistungsschalter umfasst drei Poleinheiten mit jeweils einem Polkopf und einem Polträger sowie eine Antriebseinheit zur Einleitung einer Schaltbewegung in einen Bewegkontakt eines Kontaktsystems der jeweiligen Poleinheit. Jeder Polkopf und jeder Polträger mit dem dazwischen angeordneten Kontaktsystem sind mittels zweier nebeneinander angeordneter Stützelementen an einer Haltewand des Leistungsschalters befestigt. Insbesondere bei derartigen Hochstromanwendungen sind für Polkopf und Polträger zwei nebeneinander liegende Stützelemente vorgesehen, um eine ausreichende Stabilität bei den durch die hohen Ströme auftretenden großen Querkräfte auf die Poleinheiten zu gewährleisten.Such a circuit breaker is known for example from the Siemens publication "Siemens HG 11.11, 1999". The high-current switch disclosed there as a circuit breaker comprises three pole units, each having a pole head and a pole carrier, and a drive unit for initiating a switching movement into a moving contact of a contact system of the respective pole unit. Each pole head and each pole carrier with the contact system arranged therebetween are fastened to a retaining wall of the circuit breaker by means of two support elements arranged next to one another. Particularly in such high-current applications, two mutually adjacent support elements are provided for pole head and pole carrier in order to ensure sufficient stability in the large transverse forces due to the high currents to the pole units.

Ein anderer Leistungsschalter, welcher über eine einstückige Aufnahmeeinrichtung für die Poleinheit verfügt, ist aus der WO 02/39557 bekannt. Aufgabe der vorliegenden Erfindung ist es, einen Leistungsschalter der eingangs erwähnten Art weiterzubilden, welcher bei einem konstruktiv einfachen Aufbau über verbesserte Eigenschaften hinsichtlich der Stabilität und der Isolation verfügt.Another power switch, which has a one-piece receiving device for the pole unit, is from the WO 02/39557 known. Object of the present invention is to develop a circuit breaker of the type mentioned, which has improved stability and insulation properties in a structurally simple construction.

Erfindungsgemäß wird die Aufgabe bei einem Leistungsschalter der eingangs erwähnten Art dadurch gelöst, dass sowohl die Stützeinrichtung des Polkopfes als auch die Stützeinrichtung des Polträgers anstelle der zwei Stützelemente einen einzigen einstückig ausgebildeten Isolierkörper umfassen.According to the invention the object is achieved in a circuit breaker of the type mentioned in that both the support means of the pole head and the support means of the pole carrier instead of the two support elements comprise a single integrally formed insulating body.

Mit einem derartigen einstückig ausgebildeten Isolierkörper ist eine einfache konstruktive Anordnung gegeben, weil Toleranzen verschiedener Isolierkörper eines Polkopfes oder Polträgers nicht ausgeglichen werden müssen, welche anderenfalls zu einer mechanischen Vorspannung bei der Befestigung führen würden und somit die Lebensdauer des Leistungsschalters herabsetzen würden. Des Weiteren sind die Isolationseigenschaften des Leistungsschalters verbessert, weil durch den einstückig ausgebildeten Isolierkörper kein Zwischenraum zwischen den Isolierkörpern eines Polträgers oder Polkopfes ausgebildet ist, in welchen Zwischenraum ein elektrisches Feld zwischen stromführenden Teilen des Polkopfes bzw. Polträgers und der Haltewand des Leistungsschalters zu Überschlägen und damit zu Fehlfunktionen des Schalters führen könnte. Ferner ist die Stabilität der gesamten Anordnung ebenfalls verbessert, weil durch den massiven Aufbau des einstückigen Isolierkörpers bei Querbeanspruchungen höhere Kräfte durch den einstückigen Isolierkörper mit seinem Querschnitt mit vergleichsweise großen Abmessungen aufgenommen werden können.With such an integrally formed insulating a simple structural arrangement is given because tolerances of different insulating a Polkopfes or Polträgers need not be compensated, which would otherwise lead to a mechanical bias in the attachment and thus reduce the life of the circuit breaker. Furthermore, the insulation properties of the circuit breaker are improved because no integral space between the insulators of a Polträgers or pole head is formed by the integrally formed insulator, in which space an electric field between live parts of the pole head or Polträgers and the retaining wall of the circuit breaker to flashovers and thus could lead to malfunction of the switch. Furthermore, the stability of the entire arrangement is also improved because higher forces can be absorbed by the one-piece insulating body with its cross-section with comparatively large dimensions by the massive structure of the one-piece insulating body in transverse stresses.

In einer bevorzugten Ausgestaltung der Erfindung weist die Stützeinrichtung eine metallische Halteplatte auf, welche einerseits an dem Isolierkörper und andererseits an der Haltewand befestigt ist. Mit einer derartigen metallischen Halteplatte wird in einfacher Weise eine Befestigung des Isolierkörpers an der Haltewand des Leistungsschalters unter Verteilung der mechanischen Beanspruchung realisiert.In a preferred embodiment of the invention, the support means comprises a metal retaining plate, which is fastened on the one hand to the insulating body and on the other hand to the retaining wall. With such a metal retaining plate is a simple way of fastening the insulating body realized on the retaining wall of the circuit breaker with distribution of mechanical stress.

In weiterer bevorzugter Ausführungsform sind in dem Isolierkörper der metallischen Halteplatte gegenüberliegend Befestigungselemente zur Befestigung des Isolierkörpers an der Poleinheit vorgesehen. Durch derartige Befestigungselemente ist ein einfacher konstruktiver Aufbau des Leistungsschalters gewährleistet.In a further preferred embodiment, fastening elements for fastening the insulating body to the pole unit are provided in the insulating body of the metallic retaining plate opposite. By such fasteners a simple structural design of the circuit breaker is ensured.

Die Erfindung wird im Folgenden anhand der Zeichnung und eines Ausführungsbeispiels mit Bezug auf die beiliegenden Figuren näher erläutert. Es zeigen:

Figur 1
eine Querschnittsansicht eines erfindungsgemäßen Leistungsschalters;
Figur 2
eine Querschnittsansicht eines Stützelementes des erfindungsgemäßen Leistungsschalters aus Figur 1; und
Figur 3
eine perspektivische Ansicht des Stützelementes der Figur 2.
The invention will be explained in more detail below with reference to the drawing and an embodiment with reference to the accompanying figures. Show it:
FIG. 1
a cross-sectional view of a circuit breaker according to the invention;
FIG. 2
a cross-sectional view of a support element of the circuit breaker according to the invention FIG. 1 ; and
FIG. 3
a perspective view of the support element of FIG. 2 ,

Figur 1 zeigt einen Hochstromschalter als Leistungsschalter für Hochstromanwendungen in einer Querschnittsansicht. Der Leistungsschalter 1 umfasst drei Poleinheiten für die drei Phasen eines zu schaltenden Wechselstromes, von denen figürlich dargestellt nur eine Poleinheit mit 2 bezeichnet ist. Die Poleinheit 2 umfasst einen Polkopf 3 sowie einen Polträger 4, zwischen denen ein Kontaktsystem 5 in Form einer Vakuumschaltröhre 5 zum Schalten eines Stromes zwischen einem ersten Anschluss 6 des Polkopfes 3 und einem zweiten Anschluss 7 des Polträgers 4 angeordnet ist. Ein Bewegkontakt 8 der Vakuumschaltröhre 5 ist über ein Antriebsgestänge 9 mit einer Antriebseinheit 10 des Leistungsschalters gekoppelt, wobei die Antriebseinheit 10 zum Einleiten einer Schaltbewegung in den Bewegkontakt 8 des Kontaktsystems 5 ausgebildet ist. Die Poleinheit 2 ist mittels Stützeinrichtungen 11 und 12 sowie Haltevorrichtungen 13 bzw. 14 an einer Haltewand 15 des Leistungsschalters befestigt. Die Stützeinrichtungen 11 und 12 dienen der elektrischen Isolation der Poleinheit 2 gegenüber der Haltewand 15 und der Antriebseinheit 10 des Leistungsschalters sowie zur mechanischen Stabilisierung der gesamten Anordnung. FIG. 1 shows a high-current switch as a circuit breaker for high current applications in a cross-sectional view. The circuit breaker 1 comprises three pole units for the three phases of an alternating current to be switched, of which only one polar unit is shown in FIG. 2. The pole unit 2 comprises a pole head 3 and a pole carrier 4, between which a contact system 5 in the form of a vacuum interrupter 5 for switching a current between a first terminal 6 of the pole head 3 and a second terminal 7 of the pole carrier 4 is arranged. A moving contact 8 the vacuum interrupter 5 is coupled via a drive linkage 9 to a drive unit 10 of the circuit breaker, wherein the drive unit 10 is designed to initiate a switching movement in the moving contact 8 of the contact system 5. The pole unit 2 is secured by means of support means 11 and 12 and holding devices 13 and 14, respectively, to a retaining wall 15 of the circuit breaker. The support means 11 and 12 are used for electrical insulation of the pole unit 2 relative to the retaining wall 15 and the drive unit 10 of the circuit breaker and for mechanical stabilization of the entire arrangement.

Figur 2 zeigt eine Querschnittsansicht der Stützeinrichtung 11 aus Figur 1, wobei die Stützeinrichtung 12 die gleiche Ausbildung aufweist. Die Stützeinrichtung 11 umfasst einen einstückigen Isolierkörper 16 mit einer ovalen Ausbildung aus Gießharz, welcher mittels zwei nebeneinander angeordneten Verschraubungen 17, 18 an der Poleinheit 2 aus Figur 1 befestigt ist, und über zwei nebeneinander angeordnete Verschraubungen 19 und 20 an einer metallischen Halteplatte 21 befestigt ist, welche ihrerseits wiederum mittels eines Befestigungsmittels 22 in Form einer Verschraubung mit der Haltevorrichtung 13 des Leistungsschalters verschraubt ist. Durch den einstückig ausgebildeten ovalen Isolierkörper 16 mit einem im Vergleich zu den Stützelementen des bekannten Leistungsschalters großen Querschnitt ist somit ein massiver Aufbau der Stützeinrichtung 11 gewährleistet, wobei insbesondere zwischen den nebeneinander angeordneten Verschraubungen keine Hohlräume vorhanden sind, in denen ein elektrisches Feld zu einem Überschlag führen könnte. Der Isolierkörper 16 weist im Ausführungsbeispiel einen ovalen Querschnitt mit einer etwa doppelt so großen Längsausdehnung im Vergleich zu seiner Querausdehnung auf und ist an seiner Außenseite ferner mit umlaufenden Rippen 23 versehen, die zur Erhöhung der Kriechstromfestigkeit des Isolierkörpers dienen. FIG. 2 shows a cross-sectional view of the support device 11 from FIG. 1 wherein the support means 12 has the same construction. The support device 11 comprises a one-piece insulating body 16 with an oval formation made of cast resin, which by means of two juxtaposed screw 17, 18 on the pole unit 2 from FIG. 1 is fastened, and two juxtaposed screw 19 and 20 is fixed to a metallic support plate 21, which in turn is screwed by means of a fastening means 22 in the form of a screw with the holding device 13 of the circuit breaker. By integrally formed oval insulating body 16 with a large compared to the support elements of the known circuit breaker cross section thus a solid structure of the support means 11 is ensured, in particular between the juxtaposed fittings no cavities are present in which an electric field lead to a rollover could. The insulating body 16 has in the exemplary embodiment an oval cross-section with an approximately twice as long longitudinal extent compared to its transverse extent and is also on its outside with circumferential ribs 23 provided, which serve to increase the tracking resistance of the insulator.

Figur 3 zeigt eine perspektivische Ansicht des Isolierkörpers und der Stützeinrichtung 11 der Figur 2, bei der insbesondere die umlaufenden Rippen 23 ersichtlich sind, sowie die Befestigung der metallischen Halteplatte 21 durch die Verschraubungen 19 und 20 des Isolierkörpers. Aus der metallischen Halteplatte heraus erstreckt sich die Verschraubung 22 zur Befestigung der Stützeinrichtung an der Haltewand des Leistungsschalters. FIG. 3 shows a perspective view of the insulating body and the support means 11 of FIG. 2 in which in particular the circumferential ribs 23 can be seen, as well as the attachment of the metallic support plate 21 through the screw 19 and 20 of the insulator. From the metal retaining plate out the screw 22 extends to attach the support means to the retaining wall of the circuit breaker.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Leistungsschalterbreakers
22
Poleinheitpole unit
33
Polkopfpole head
44
Polträgerpole carrier
55
VakuumschaltröhreVacuum interrupter
66
Erste AnschlussmittelFirst connection means
77
Zweite AnschlussmittelSecond connection means
88th
Bewegkontaktmoving contact
99
Antriebsgestängedrive linkage
1010
Antriebseinheitdrive unit
11, 1211, 12
Stützeinrichtungensupport devices
13, 1413, 14
Haltevorrichtungenholders
1515
Haltewandretaining wall
1616
Isolierkörperinsulator
17, 18, 19, 2017, 18, 19, 20
Aufnahme BefestigungsmittelRecording fasteners
2121
Metallische HalteplatteMetallic retaining plate
2222
Verschraubungscrew
2323
Rippenribs

Claims (3)

  1. Power switch, especially high-current switch, comprising at least one pole unit (2) with a pole head (3) and a pole base (4) and a contact system (5) interposed therebetween, and a drive unit (9, 10) for introducing a switching movement into a moving contact (8) of the contact system (5), wherein every pole head (3) and every pole base (4) of the pole unit (2) are in each case fastened to a retaining wall (15) of the power switch by means of a supporting device (11, 12), characterized in that both the supporting device (11) of the pole head (3) and the supporting device (12) of the pole base (4) in each case comprise a single one-piece insulating body (16).
  2. Power switch according to Claim 1, characterized in that the supporting device (11, 12) has a metallic retaining plate (21), which on the one hand is fastened to the insulating body (16) and on the other to the retaining wall (15).
  3. Power switch according to Claim 2, characterized in that fastening elements (17, 18) for fastening the insulating body (16) to the pole unit are provided in the insulating body (16) opposite the metallic retaining plate (21).
EP07728883.5A 2006-05-10 2007-05-08 Power switch, especially high-current switch Active EP2016603B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202006007974U DE202006007974U1 (en) 2006-05-10 2006-05-10 Power switch e.g. high current switch, has supporting device comprising insulation body formed as single piece instead of two supporting units that are arranged adjacent to each other at retaining wall
PCT/EP2007/054430 WO2007128814A1 (en) 2006-05-10 2007-05-08 Power switch, especially high-current switch

Publications (2)

Publication Number Publication Date
EP2016603A1 EP2016603A1 (en) 2009-01-21
EP2016603B1 true EP2016603B1 (en) 2019-06-26

Family

ID=36934341

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07728883.5A Active EP2016603B1 (en) 2006-05-10 2007-05-08 Power switch, especially high-current switch

Country Status (5)

Country Link
EP (1) EP2016603B1 (en)
CN (2) CN200993926Y (en)
DE (1) DE202006007974U1 (en)
ES (1) ES2747258T3 (en)
WO (1) WO2007128814A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57147829A (en) * 1981-03-06 1982-09-11 Tokyo Shibaura Electric Co Vacuum breaker
CH678126A5 (en) * 1989-01-30 1991-07-31 Sprecher Energie Ag Medium=voltage vacuum switch with rolling contact arrangement - has switch surrounded by section of external connector which extends into insulating housing with aperture for contact plunger
DE10056646C1 (en) 2000-11-09 2002-03-28 Siemens Ag Receiving device used for switching tubes of power switches, comprises a shell-like insulating housing comprising thin wall insulating struts, thick wall struts and a support provided in the back wall region

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN200993926Y (en) 2007-12-19
ES2747258T3 (en) 2020-03-10
CN101432833A (en) 2009-05-13
EP2016603A1 (en) 2009-01-21
WO2007128814A1 (en) 2007-11-15
DE202006007974U1 (en) 2006-08-17

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