WO1996021936A1 - Device for measuring voltages along solid-insulated bus bars in medium-voltage switchgear - Google Patents

Device for measuring voltages along solid-insulated bus bars in medium-voltage switchgear Download PDF

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Publication number
WO1996021936A1
WO1996021936A1 PCT/DE1996/000012 DE9600012W WO9621936A1 WO 1996021936 A1 WO1996021936 A1 WO 1996021936A1 DE 9600012 W DE9600012 W DE 9600012W WO 9621936 A1 WO9621936 A1 WO 9621936A1
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WO
WIPO (PCT)
Prior art keywords
voltage
low
converters
medium
arrangement
Prior art date
Application number
PCT/DE1996/000012
Other languages
German (de)
French (fr)
Inventor
Hans-Joachim Müller
Rainer Poth
Gildo Mahn
Lennart Fleischer
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP96900253A priority Critical patent/EP0803128A1/en
Publication of WO1996021936A1 publication Critical patent/WO1996021936A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
    • G01R31/3272—Apparatus, systems or circuits therefor
    • G01R31/3274—Details related to measuring, e.g. sensing, displaying or computing; Measuring of variables related to the contact pieces, e.g. wear, position or resistance
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/0354—Gas-insulated switchgear comprising a vacuum switch
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/0356—Mounting of monitoring devices, e.g. current transformers

Definitions

  • the invention relates to an arrangement for voltage measurement on encapsulated solid-insulated busbars of medium-voltage switchgear assemblies arranged in busbar containers, which are equipped with vacuum circuit breakers and three-position switches arranged in the gas space and which have low-voltage boxes on the front in front of the gas space.
  • Busbar container with the voltage transformers themselves insulated and housed in a separate housing filled with protective gas.
  • the voltage transformers can be connected directly to the busbar via a corresponding contact bushing, or can be connected to the busbar via a switch contact of a three-position switch. The latter option allows a faulty voltage transformer to be replaced without having to switch off the busbar.
  • the object on which the invention is based is to define an arrangement in which the voltage measurement in such medium-voltage switchgear is possible with considerably little effort and, overall, simplified handling with the greatest possible safety can be achieved. According to the invention, this is due to the features
  • the arrangement is realized by encapsulated phase-specific voltage transformers,
  • phase-specific voltage converters are positioned directly above the busbars behind the low-voltage boxes, 1.3.
  • the voltage converters are contacted with the busbars in each case via an adapter connection which can be placed on the outer surface area of the respective voltage converter.
  • the voltage transformers With the use of encapsulated voltage transformers, the otherwise usual gas-tight housings are no longer required to accommodate them. In this version, the voltage transformers also provide great protection against contact. With the direct positioning of the voltage transformers above the busbar container and behind the low-voltage box, the arrangement is compact. The voltage converter with its busbar contact connection can be connected directly or via a disconnector contact of a three-position switch to the busbar arranged in the gas-filled busbar container.
  • contour of the voltage transformers is formed by a block of cuboids, which is delimited on three sides, on which a trapezoid block tapering outwards in cross-sectional profile adjoins the fourth side
  • the adapter connection is in the upper area of the tapered trapezoidal block
  • the voltage converters face each other in such a way that the adapter connections are arranged approximately flush in one plane parallel to the front of the low-voltage box and parallel to one another. This further increases the compact structure of the arrangement and reduces it to a minimum space requirement within the medium-voltage switchgear.
  • the voltage transformers are also connected to the busbar via a respective adapter connection. The invention is explained in more detail by means of an exemplary embodiment shown in four figures, FIGS. 1 and 2 showing the essential components of a medium-voltage switchgear and their components in relation to one another, while FIGS. 3 and 4 give more detailed details of the voltage converters show with their connecting elements.
  • FIG. 1 shows the low-voltage switchgear in a side view, in which only the components essential for understanding the invention are identified in detail. It can thus be seen that the busbars SSE are arranged directly above the gas space (not shown) of the vacuum holding tube.
  • the phase-specific voltage transformers SW1, SW2 and SW3 are located directly above the busbars SSE. It can also be seen that the voltage converters SW1, SW2, SW3 are arranged directly behind the low-voltage box NSK.
  • FIG. 2 shows the medium-voltage switchgear in a front view, the low-voltage box NSK (FIG. 1) not being shown. It is clear here that the individual voltage converters SW .. are connected to the respective busbar SSE via their respective adapter connection AA .. In addition, the three-position switch DSS, which is currently in the OFF position, is indicated in the gas space (not shown) below the busbar SSE.
  • FIG. 3 shows the arrangement of the voltage converters SW .., in the front view, in which only the voltage converter SW3 with its adapter AD3 is shown. Furthermore, it can be seen that the voltage converter SW3 contains a low-voltage plug-in device SKA as a connecting part to the secondary connections.
  • FIG. 4 shows the arrangement for voltage measurement with the three voltage converters SW1, SW2, SW3 in a lower top view. see, from which the cross-section of the rectangular block contours with the tapered trapezoidal block and their arrangement to each other result.
  • the adapter connections AA1, AA2, AA3, which are aligned and parallel to one another and can be seen in one plane parallel to the front of the low-voltage box, on which the associated adapters are not fitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Patch Boards (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

The invention concerns a device for measuring voltages along encapsulated solid-insulated bus bars located in enclosures in medium-voltage switches equipped with vacuum power switches and three-way switches located in the gas space and with low-voltage boxes in front of the gas space. The device is designed with individual-phase voltage converters (SW1, SW2, SW3) over the bus bars (SSE) and behind the low-voltage (NSK), the voltage converters (SW1, SW2, SW3) being contacted by means of adapter terminals (AA1, AA2, AA3) in the region of the upper surface of the converters. Devices of this kind are suitable for use in gas-insulated power switches 8DC.

Description

Beschreibungdescription
Anordnung zur Spannungsmessung an feststoffisolierter Sammel- schiene von Mittelspannungs-SchaltanlagenArrangement for voltage measurement on solid-insulated busbars of medium-voltage switchgear
Die Erfindung betrifft eine Anordnung zur Spannungsmessung an in Sammelschienenbehälter angeordneten, gekapselten feststof¬ fisolierten Sammelschienen von Mittelspannungs-Schaltanlagen, die mit im Gasraum angeordneten Vakuumleistungsschaltern und Dreistellungsschaltern ausgestattet sind, und die frontseitig vor dem Gasraum Niederspannungskästen aufweisen.The invention relates to an arrangement for voltage measurement on encapsulated solid-insulated busbars of medium-voltage switchgear assemblies arranged in busbar containers, which are equipped with vacuum circuit breakers and three-position switches arranged in the gas space and which have low-voltage boxes on the front in front of the gas space.
Eine derartige Anordnung ist aus der Siemens-Firmendruck¬ schrift "Mittelspannungsanlagen", Katalog HA35.11, 1993, Seite 26 bekannt. Die Spannungsmessung erfolgt direkt vomSuch an arrangement is known from the Siemens company publication "Medium voltage systems", catalog HA35.11, 1993, page 26. The voltage measurement takes place directly from
Sammelschienenbehälter aus, wobei die Spannungswandler selbst isoliert und in einem separaten, mit Schutzgas gefüllten Gehäuse untergebracht sind. Die Spannungswandler können dabei direkt über eine entsprechende Kontaktdurchführung mit der Sammelschiene verbunden sein, oder über einen Trennerkontakt eines Dreistellungsschalters schaltbar mit der Sammelschiene in Verbindung stehen. Die letztgenannte Möglichkeit gestattet das Auswechseln eines fehlerhaften Spannungswandlers ohne das Abschalten der Sammelschiene vornehmen zu müssen. Die der Erfindung zugrundeliegende Aufgabe besteht darin, eine Anordnung zu definieren, bei der die Spannungsmessung bei derartigen Mittelspannungs-Schaltanlagen mit erheblich geringem Aufwand ermöglicht und insgesamt eine vereinfachte Handhabung mit größtmöglicher Sicherheit zu erreichen ist. Erfindungsgemäß wird dies durch die MerkmaleBusbar container, with the voltage transformers themselves insulated and housed in a separate housing filled with protective gas. The voltage transformers can be connected directly to the busbar via a corresponding contact bushing, or can be connected to the busbar via a switch contact of a three-position switch. The latter option allows a faulty voltage transformer to be replaced without having to switch off the busbar. The object on which the invention is based is to define an arrangement in which the voltage measurement in such medium-voltage switchgear is possible with considerably little effort and, overall, simplified handling with the greatest possible safety can be achieved. According to the invention, this is due to the features
1.1. die Anordnung ist durch vergossene phasenindividuelle Spannungswandler realisiert,1.1. the arrangement is realized by encapsulated phase-specific voltage transformers,
1.2. die phasenindividuellen Spannungswandler sind unmittel¬ bar über den Sammelschienen hinter dem Niederspannungs- kästen positioniert, 1.3. die Kontaktierung der Spannungswandler mit den Sammel- schienen erfolgt jeweils über einen Adapteranschluß, der auf dem äußeren Flächenbereich des jeweiligen Spannungs- wandlers aufsetzbar ist, erreicht.1.2. the phase-specific voltage converters are positioned directly above the busbars behind the low-voltage boxes, 1.3. The voltage converters are contacted with the busbars in each case via an adapter connection which can be placed on the outer surface area of the respective voltage converter.
Mit dem Einsatz von vergossenen Spannungswandlern sind die sonst üblichen gasdichten Gehäuse zur Aufnahme derselben nicht mehr erforderlich. Die Spannungswandler bilden in dieser Ausführung außerdem einen großen Berührungsschutz. Mit der unmittelbaren Positionierung der Spannungswandler über dem Sammelschienenbehälter und hinter dem Niederspannungs- kasten ist ein kompakter Aufbau der Anordnung erreicht. Der Spannungswandler mit seinem Sammelschienen-Kontaktanschluß kann direkt oder über einen Trennerkontakt eines Dreistel- lungsschalters mit der jeweils im gasgefüllten Sammelschie¬ nenbehälter angeordneten Sammelschiene verbunden werden.With the use of encapsulated voltage transformers, the otherwise usual gas-tight housings are no longer required to accommodate them. In this version, the voltage transformers also provide great protection against contact. With the direct positioning of the voltage transformers above the busbar container and behind the low-voltage box, the arrangement is compact. The voltage converter with its busbar contact connection can be connected directly or via a disconnector contact of a three-position switch to the busbar arranged in the gas-filled busbar container.
Eine vorteilhafte Ausgestaltung der Erfindung sieht die Merkmale 2.1. die Kontur der Spannungswandler ist durch einen dreisei¬ tig begrenzten Quaderblock gebildet, an dem sich an der vierten Seite ein im Querschnittsprofil nach außen ver¬ jüngender Trapezblock anschließt,An advantageous embodiment of the invention features 2.1. the contour of the voltage transformers is formed by a block of cuboids, which is delimited on three sides, on which a trapezoid block tapering outwards in cross-sectional profile adjoins the fourth side
2.2. der Adapteranschluß befindet sich im oberen Flächenbe- reich des sich verjüngenden Trapezblocks,2.2. the adapter connection is in the upper area of the tapered trapezoidal block,
2.3. die Spannungswandler sind derart einander zugewandt, daß die Adapteranschlüsse annähernd fluchtend in einer Ebene parallel zur Frontseite des Niederspannnugskastens und parallel zueinander angeordnet sind. Damit wird der kompakte Aufbau der Anordnung zusätzlich erhöht und auf einen minimalen Platzbedarf innerhalb der Mittelspannungs-Schaltanlage reduziert. Die Kontaktierung der Spannungswandler mit der Sammelschiene erfolgt darüber hinaus über einen jeweiligen Adapteranschluß. Die Erfindung wird durch ein in vier Figuren dargestelltes Ausführungsbeispiel näher erläutert, wobei die Figuren 1 und 2 die wesentlichen Bestandteile einer Mittelspannungs-Schalt- anlage sowie deren Bestandteile in ihrer Lage zueinander erkennen lassen, während die Figuren 3 und 4 nähre Einzelhei¬ ten der Spannungswandler mit ihren Anschlußelementen zeigen.2.3. the voltage converters face each other in such a way that the adapter connections are arranged approximately flush in one plane parallel to the front of the low-voltage box and parallel to one another. This further increases the compact structure of the arrangement and reduces it to a minimum space requirement within the medium-voltage switchgear. The voltage transformers are also connected to the busbar via a respective adapter connection. The invention is explained in more detail by means of an exemplary embodiment shown in four figures, FIGS. 1 and 2 showing the essential components of a medium-voltage switchgear and their components in relation to one another, while FIGS. 3 and 4 give more detailed details of the voltage converters show with their connecting elements.
Die Figur 1 zeigt die Niederspannungs-Schaltanlage in der Seitenansicht, in der lediglich die zum Verständnis der Erfindung wesentlichen Bestandteile im einzelnen bezeichnet sind. So ist erkennbar, daß unmittelbar über dem nicht be¬ zeichneten Gasraum der Vakuumsehaltröhre die Sammelschienen SSE angeordnet sind. Unmittelbar über den Sammelschienen SSE befinden sich die phasenindividuellen Spannungswandler SWl, SW2 und SW3. Weiterhin ist erkennbar, daß die Spannungs¬ wandler SWl, SW2, SW3 unmittelbar hinter dem Niederspannungs- kasten NSK angeordnet sind.FIG. 1 shows the low-voltage switchgear in a side view, in which only the components essential for understanding the invention are identified in detail. It can thus be seen that the busbars SSE are arranged directly above the gas space (not shown) of the vacuum holding tube. The phase-specific voltage transformers SW1, SW2 and SW3 are located directly above the busbars SSE. It can also be seen that the voltage converters SW1, SW2, SW3 are arranged directly behind the low-voltage box NSK.
Die Figur 2 zeigt die Mittelspannungs-Schaltanlage in der Frontansicht, wobei der Niederspannungskasten NSK (Figur l) nicht dargestellt ist. Hier wird deutlich, daß die einzelnen Spannungswandler SW.. über ihren jeweiligen Adapteranschluß AA.. mit der jeweiligen Sammelschiene SSE verbunden sind. Außerdem ist in dem nicht bezeichneten Gasraum unterhalb der Sammelschiene SSE der Dreistellungsschalter DSS angedeutet, der derzeit die Schaltstellung AUS einnimmt.FIG. 2 shows the medium-voltage switchgear in a front view, the low-voltage box NSK (FIG. 1) not being shown. It is clear here that the individual voltage converters SW .. are connected to the respective busbar SSE via their respective adapter connection AA .. In addition, the three-position switch DSS, which is currently in the OFF position, is indicated in the gas space (not shown) below the busbar SSE.
Die Figur 3 zeigt die Anordnung der Spannungswandler SW.., in der Vorderansicht, in der lediglich der Spannungswandler SW3 mit seinem Adapter AD3 dargestellt ist. Weiterhin ist erkenn¬ bar, daß der Spannungswandler SW3 eine Niederspannungssteck- Vorrichtung SKA als Verbindungsteil zu den Sekundäranschlüs¬ sen enthält.FIG. 3 shows the arrangement of the voltage converters SW .., in the front view, in which only the voltage converter SW3 with its adapter AD3 is shown. Furthermore, it can be seen that the voltage converter SW3 contains a low-voltage plug-in device SKA as a connecting part to the secondary connections.
Die Figur 4 zeigt die Anordnung zur Spannungsmessung mit den drei Spannungswandlern SWl, SW2, SW3 in einer unteren Drauf- sieht, aus der sich die im Querschnitt ergebenden dreiseitig begrenzten Quaderblockkonturen mit dem sich verjüngenden Trapezblock und deren Anordnung zueinander ergeben. Außerdem sind die in einer Ebene parallel zur Frontseite des hier nicht dargestellten Niederspannungskastens fluchtend und parallel zueinander angeordneten Adapteranschlüsse AA1, AA2, AA3 erkennbar, auf denen die zugehörigen Adapter nicht aufgesetzt sind. FIG. 4 shows the arrangement for voltage measurement with the three voltage converters SW1, SW2, SW3 in a lower top view. see, from which the cross-section of the rectangular block contours with the tapered trapezoidal block and their arrangement to each other result. In addition, the adapter connections AA1, AA2, AA3, which are aligned and parallel to one another and can be seen in one plane parallel to the front of the low-voltage box, on which the associated adapters are not fitted.

Claims

Patentansprüche claims
1. Anordnung zur Spannungsmessung an in Sammelschienenbehäl¬ ter angeordneten, gekapselten feststoffisolierten Sammel- schienen von Mittelspannungs-Schaltanlagen, die mit im Gas- raum angeordneten Vakuumleistungsschaltern und Dreistellungs- Schaltern ausgestattet sind, und die frontseitig vor dem Gasraum Niederspannungskästen aufweisen, g e k e n n z e i c h n e t d u r c h die Merkmale l.l. die Anordnung ist durch vergossene phasenindividuelle Spannungswandler (SWl, SW2, SW3) realisiert, 1.2. die phasenindividuellen Spannungswandler (SWl, SW2, SW3)sind unmittelbar über den Sammelschienen (SSE) hinter dem Niederspannungskasten (NSK) positioniert, 1.3. die Kontaktierung der Spannungswandler (SWl, SW2, SW3) mit den Sammelschienen (SSE) erfolgt jeweils über einen Adapteranschluß (AA1, AA2, AA3) , der auf dem äußeren Flächenbereich des jeweiligen Spannungswandlers (SWl, SW2, SW3) aufsetzbar ist.1. Arrangement for voltage measurement on encapsulated, solid-insulated busbars of medium-voltage switchgear assemblies arranged in busbar containers, which are equipped with vacuum circuit-breakers and three-position switches arranged in the gas chamber and which have low-voltage boxes on the front in front of the gas chamber, the characteristics l. the arrangement is realized by encapsulated phase-specific voltage converters (SW1, SW2, SW3), 1.2. the phase-specific voltage transformers (SW1, SW2, SW3) are positioned directly above the busbars (SSE) behind the low-voltage box (NSK), 1.3. the voltage converters (SW1, SW2, SW3) are contacted with the busbars (SSE) via an adapter connection (AA1, AA2, AA3), which can be placed on the outer surface area of the respective voltage converter (SW1, SW2, SW3).
2. Anordnung zur Spannungsmessung nach Anspruch 1 g e k e n n z e i c h n e t d u r c h die Merkmale2. Arrangement for voltage measurement according to claim 1 g e k e n n z e i c h n e t d u r c h the features
2.1. die Kontur der Spannungswandler (SWl, SW2, SW3) ist durch einen dreiseitig begrenzten Quaderblock gebildet, an dem sich an der vierten Seite ein im Querschnitts- profil nach außen verjüngender Trapezblock anschließt,2.1. the contour of the voltage transformers (SW1, SW2, SW3) is formed by a block of cuboids bounded on three sides, which is followed on the fourth side by a trapezoidal block that tapers outwards in cross-sectional profile,
2.2. der Adapteranschluß (AAl, AA2, AA3) befindet sich im oberen Flächenbereich des sich verjüngenden Trapez- blocks, 2.3. die Spannungswandler (SWl, SW2, SW3) sind derart einan¬ der zugewandt, daß die Adapteranschlüsse (AAl, AA2, AA3) annähernd fluchtend in einer Ebene parallel zur Front¬ seite des Niederspannnugskastens (NSK) und parallel zu¬ einander angeordnet sind. 2.2. the adapter connection (AAl, AA2, AA3) is located in the upper surface area of the tapered trapezoidal block, 2.3. the voltage converters (SW1, SW2, SW3) face each other in such a way that the adapter connections (AAl, AA2, AA3) are arranged approximately in alignment in a plane parallel to the front side of the low-voltage box (NSK) and parallel to one another.
PCT/DE1996/000012 1995-01-13 1996-01-05 Device for measuring voltages along solid-insulated bus bars in medium-voltage switchgear WO1996021936A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP96900253A EP0803128A1 (en) 1995-01-13 1996-01-05 Device for measuring voltages along solid-insulated bus bars in medium-voltage switchgear

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29501082U DE29501082U1 (en) 1995-01-13 1995-01-13 Arrangement for voltage measurement on solid-insulated busbars of medium-voltage switchgear
DE29501082.7 1995-01-13

Publications (1)

Publication Number Publication Date
WO1996021936A1 true WO1996021936A1 (en) 1996-07-18

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PCT/DE1996/000012 WO1996021936A1 (en) 1995-01-13 1996-01-05 Device for measuring voltages along solid-insulated bus bars in medium-voltage switchgear

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Country Link
EP (1) EP0803128A1 (en)
CN (1) CN1167541A (en)
DE (1) DE29501082U1 (en)
WO (1) WO1996021936A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1107408A1 (en) * 1999-12-07 2001-06-13 Kabushiki Kaisha Meidensha Gas-insulated switchgear
EP2383851A3 (en) * 2010-04-27 2013-02-27 AREVA Energietechnik GmbH Electric switch assembly, in particular medium voltage medium voltage switching assembly
US20210313781A1 (en) * 2018-12-19 2021-10-07 Abb Schweiz Ag Three phase switchgear using single phase equipment in single casing
GB2616474A (en) * 2022-03-11 2023-09-13 Balfour Beatty Plc Testing interface

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4103101A1 (en) * 1990-03-22 1991-09-26 Mitsubishi Electric Corp Isolating switch for gas-insulated switchgear - has support for rotary location of switch blade and bearing for three=phase drive shaft and earth
DE9012016U1 (en) * 1990-08-20 1991-12-19 Siemens AG, 8000 München Measuring transformer for a switchgear
DE9404007U1 (en) * 1994-03-10 1994-05-05 Kommanditgesellschaft Ritz Messwandler GmbH & Co, 20251 Hamburg Power converter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4103101A1 (en) * 1990-03-22 1991-09-26 Mitsubishi Electric Corp Isolating switch for gas-insulated switchgear - has support for rotary location of switch blade and bearing for three=phase drive shaft and earth
DE9012016U1 (en) * 1990-08-20 1991-12-19 Siemens AG, 8000 München Measuring transformer for a switchgear
DE9404007U1 (en) * 1994-03-10 1994-05-05 Kommanditgesellschaft Ritz Messwandler GmbH & Co, 20251 Hamburg Power converter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1107408A1 (en) * 1999-12-07 2001-06-13 Kabushiki Kaisha Meidensha Gas-insulated switchgear
EP2383851A3 (en) * 2010-04-27 2013-02-27 AREVA Energietechnik GmbH Electric switch assembly, in particular medium voltage medium voltage switching assembly
US20210313781A1 (en) * 2018-12-19 2021-10-07 Abb Schweiz Ag Three phase switchgear using single phase equipment in single casing
US11637414B2 (en) * 2018-12-19 2023-04-25 Abb Schweiz Ag Three phase switchgear using single phase equipment in single casing
GB2616474A (en) * 2022-03-11 2023-09-13 Balfour Beatty Plc Testing interface

Also Published As

Publication number Publication date
CN1167541A (en) 1997-12-10
EP0803128A1 (en) 1997-10-29
DE29501082U1 (en) 1995-03-23

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