EP0430123A1 - Hochspannungsschalter mit Varistoren - Google Patents

Hochspannungsschalter mit Varistoren Download PDF

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Publication number
EP0430123A1
EP0430123A1 EP90122515A EP90122515A EP0430123A1 EP 0430123 A1 EP0430123 A1 EP 0430123A1 EP 90122515 A EP90122515 A EP 90122515A EP 90122515 A EP90122515 A EP 90122515A EP 0430123 A1 EP0430123 A1 EP 0430123A1
Authority
EP
European Patent Office
Prior art keywords
varistor
circuit breaker
resistor
column
breaker according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90122515A
Other languages
English (en)
French (fr)
Other versions
EP0430123B1 (de
Inventor
Van Doan Pham
Joseph Martin
Robert Deville
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.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
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 GEC Alsthom SA filed Critical GEC Alsthom SA
Publication of EP0430123A1 publication Critical patent/EP0430123A1/de
Application granted granted Critical
Publication of EP0430123B1 publication Critical patent/EP0430123B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16—Impedances connected with contacts
    • H01H33/161—Variable impedances
    • 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/14—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
    • H01H2033/146—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc using capacitors, e.g. for the voltage division over the different switches

Definitions

  • the present invention relates to a high voltage circuit breaker with varistors.
  • High voltage circuit breakers which are equipped with varistors, in particular for operating the shunt reactors of the electrical networks; the purpose of the presence of varistors, also called non-linear or variable resistors or resistors depending on the voltage, is to reduce overvoltages.
  • the desired overvoltage limit is often in the range of 1.5 to 1.6 p.u.
  • the current can be 5 / IO OOO ampere
  • the current can exceed 2,000 amps.
  • the energy dissipated in the varistors reaches several thousand kilojoules.
  • An object of the present invention is to provide a high voltage circuit breaker with varistors allowing the solution of this problem.
  • the subject of the invention is a high voltage circuit breaker comprising at least one breaking chamber and, in parallel on this breaking chamber, on the one hand a varistor in series with a switch and, on the other hand, a distribution capacitor, characterized in that a purely ohmic resistance, of value between 30 and 300 ohms, is inserted in series with said varistor.
  • the resistor is formed by a first stack of discs disposed in an insulating tube in which the varistor is placed in the form of a second stack of discs, said tube being placed inside an insulating column filled with a gas having good dielectric properties.
  • said resistor is formed by a stack of discs placed in an insulating tube, said tube being arranged horizontally and being connected mechanically and electrically, on one side to a column containing the main breaking chamber and, on the other side, to a column containing the varistor.
  • the resistance formed by rods and the varistor are housed side by side in the insulating envelope which overcomes the main breaking chamber.
  • the varistor is arranged in a column provided with a cover having a horizontal extension containing the associated resistance, the extension being closed by a bottom provided with current outlet.
  • the cover having an extension containing the resistance overcomes the main chamber.
  • the varistor material is chosen from compounds based on zinc oxides and silicon carbide.
  • the reference L designates a phase of a high-voltage line into which a circuit breaker is inserted comprising, for each phase, two interrupting chambers in series 1 and 2.
  • the breaking chambers are, as is well known, made up of a insulating column filled with a gas with high dielectric strength such as sulfur hexafluoride, under a pressure of a few bars.
  • each of the switching chambers In parallel on each of the switching chambers are arranged insulating columns C1 and C2 respectively; these columns contain a gas or a dielectric liquid and house a capacitor and intended for the distribution of the voltage between the two breaking chambers.
  • Each chamber comprises in parallel another column, respectively K1 and K2, inside which there are, connected in series, a varistor (V1, V2) and a switch (I1, I2).
  • a Is corresponds a threshold voltage Us of the varistor.
  • the internal resistance of the varistor to this threshold is:
  • Ra 80 ohms, or 40 ohms for each of the resistors R1 and R2.
  • the total duration of transition to 700 A peak in phase opposition can be estimated at 6 milliseconds.
  • resistors R1 and R2 which, in general, will be between 30 and 300 ohms
  • the thermal energy dissipated by the resistor during operation in phase opposition will be approximately: about 60,000 joules
  • additional resistors are not valid for the protection of phase-to-earth faults. Indeed, during a lightning strike on the line, the presence of additional resistors prevents the rapid flow of charges. A high overvoltage then occurs on the resistor, given the large intensity of the discharge current which can reach ten kiloamperes, and the high speed of current increase.
  • connection between the resistor and the varistor must be as short as possible.
  • Figure 2 is a partial view in axial section of the column K1 containing in particular the varistor V1 and the resistor R1.
  • the varistor V1 consists of a stack of discs 10 based on zinc oxides or on silicon carbide (CSi); the top and the base of the stack are closed by metal disks, 11 and 12 respectively.
  • the resistor R1 consists of a stack of discs 13, for example made of conductive ceramic based on carbon.
  • the stack is placed directly above the metal disc 11, and is in contact at its upper part with a metal disc 14.
  • a spring 15 presses the disc 14 against the stack R1 by pressing on the inside of a cover metal 16 closing the column K1.
  • a metal braid 17 ensures the passage of current between the cover 16 and the disc 14.
  • the reference 18 designates the fixed contact of the switch II and the reference 19 the end of the movable contact; as the embodiment of the switch is well known and goes beyond the scope of the present invention, the switch has not been shown in detail.
  • the cover 16 is electrically connected by a link 21 to the top of the main breaking chamber 1, not shown in FIG. 2, but shown diagrammatically in FIG. 1.
  • column K1 The interior of column K1 is filled with a gas with good dielectric properties promoting cleavage, such as pure or mixed sulfur hexafluoride, under a pressure of a few bars.
  • a gas with good dielectric properties promoting cleavage such as pure or mixed sulfur hexafluoride
  • FIG. 3 partially represents columns 1 and K1, the resistor R1 being arranged this time outside these columns.
  • the varistor V1 always consists of a stack of discs 10, surmounted by a metal disc 25 pressed by a spring 28 bearing on a metal cover 27 closing the column K1.
  • a metal braid 28 between the disc 25 and the cover 27 ensures the passage of current.
  • Resistor R1 is formed by a stack of discs 13 placed in an insulating tube 30, for example made of epoxy glass, which can be provided with fins 31, for example made of silicone.
  • the tube 30 is hermetically closed at its ends by metal plates 32 and 33; the discs 13 are pressed by a spring 34 bearing between the plate 32 and a metal disc 35 at the end of the stack; a metal braid 36, between the plate 32 and the disc 35, ensures the passage of current.
  • the tube 30 is arranged horizontally, between the columns 1 and K1, to which it is mechanically and electrically connected.
  • connections 37 and 38 respectively connect on the one hand the plate 32 and the metal top 39 of the column 1, and on the other hand the plate 33 and the cover 27.
  • Resistor R1 only sees current flow for a very short time. In the "open" or “closed” position of the circuit breaker, the connections 37 and 38 are at the same potential; there is therefore no permanent voltage on the resistor R1.
  • the discs 13 can be formed in a single block and closed by molding in a synthetic envelope.
  • FIG. 4 illustrates an alternative embodiment, in which the varistor V1 and the resistor R1 are housed in the casing 1 containing the main breaking chamber.
  • the varistor V1 is formed by a stack of discs 10 placed in a tube 40 fixed to the cover 41 of the column 1. This cover is placed at the top of a cylindrical insulating envelope 42 provided with fins 43; this envelope, which surmounts column 1, can be made of porcelain or of insulating synthetic material.
  • the stacking of the discs 10 is surmounted by a metal disc 44 serving to support a spring 45 which also bears against the cover 41.
  • the lower part of the tube 40 serves as a support for the semi-fixed contact for inserting the varistor, as has been described for example in French patent 81 16 291.
  • the resistor R1 is formed by one or more rods 70 of small diameter based on carbon (ceramic resistor), housed in insulating tubes 71 and fixed between the cover 41 and the socket 51 of the chamber 1. The number of sticks depends on the energy to be absorbed.
  • Reference 52 designates the fixed contact tube for the passage of permanent current.
  • FIG. 5 illustrates another embodiment of the invention, for a circuit breaker with two interrupting chambers per phase.
  • the elements common to FIG. 5 and to FIG. 1 have been given the same reference numbers or signs.
  • Varistors V1 and V2 are arranged in columns K1 and K2 respectively; they are maintained by insulating supports, 81 and 82, fixed to the metal covers 91 and 92 surmounting the columns K1 and K2.
  • the metal covers 91 and 92 have horizontal cylindrical extensions 91A and 92A in which the resistors R1 and R2 are housed respectively.
  • the resistors R1 and R2 are fixed, on the one hand to the supports 81 and 82, on the other hand to metallic bottoms 91B, 92B closing the cylinders 91A, 92A.
  • the bottoms 91B, 92B have current sockets 91C, 92C, connected by a connection tube 94 for placing the two interrupting chambers 1 and 2 in series.
  • the columns K1 and K2 and the cylindrical extensions of the covers form sealed assemblies filled with dielectric gas.
  • the varistor-resistance pairs, V1, R1 and V2, R2, are found in the same dielectric fluid.
  • cover 91 with its horizontal cylindrical extension 91A can very well also be mounted on the insulating casing 1 of the main chamber.
  • the invention applies to high voltage circuit breakers and in particular to reactance circuit breakers.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Thermistors And Varistors (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)
  • Organic Insulating Materials (AREA)
  • Circuit Breakers (AREA)
  • Bipolar Transistors (AREA)
EP90122515A 1989-11-29 1990-11-26 Hochspannungsschalter mit Varistoren Expired - Lifetime EP0430123B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8915713 1989-11-29
FR8915713A FR2655188B1 (fr) 1989-11-29 1989-11-29 Disjoncteur a haute tension a varistances.

Publications (2)

Publication Number Publication Date
EP0430123A1 true EP0430123A1 (de) 1991-06-05
EP0430123B1 EP0430123B1 (de) 1994-10-12

Family

ID=9387918

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122515A Expired - Lifetime EP0430123B1 (de) 1989-11-29 1990-11-26 Hochspannungsschalter mit Varistoren

Country Status (10)

Country Link
US (1) US5124872A (de)
EP (1) EP0430123B1 (de)
JP (1) JPH06101277B2 (de)
CN (1) CN1024969C (de)
AT (1) ATE112887T1 (de)
BR (1) BR9006024A (de)
CA (1) CA2030980C (de)
DE (1) DE69013295T2 (de)
ES (1) ES2064589T3 (de)
FR (1) FR2655188B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2680043A1 (fr) * 1991-08-02 1993-02-05 Alsthom Gec Disjoncteur a coupure multiple equipe de varistances.
EP0536039A1 (de) * 1991-10-02 1993-04-07 Gec Alsthom Sa Ultra-Hochspannungsschalter
FR2688623A1 (fr) * 1992-03-13 1993-09-17 Asea Brown Boveri Interrupteur de reacteur.

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2668648B1 (fr) * 1990-10-24 1992-12-24 Alsthom Gec Disjoncteur a sf6 a condensateur incorpore.
FR2674984B1 (fr) * 1991-04-05 1993-06-11 Alsthom Gec Disjoncteur a sf6 a varistance et a condensateur incorpores.
JPH0576136A (ja) * 1991-09-13 1993-03-26 Hitachi Ltd 電力供給系統
SE510178C2 (sv) * 1991-09-16 1999-04-26 Asea Brown Boveri Ventilavledaranordning
EP0555144A1 (de) * 1992-02-07 1993-08-11 Gec Alsthom Sa Pumpstation
US6236010B1 (en) 1999-07-14 2001-05-22 Southern States, Inc. Circuit interrupter including a penetrating electrical contact with grip and release structure
US6316742B1 (en) 1999-07-14 2001-11-13 Southern States, Inc. Limited restrike circuit interrupter used as a line capacitor and load switch
CN101217078B (zh) * 2008-01-04 2011-06-01 西安交通大学 一种带串联电阻的永磁机构真空断路器组合装置
US8426736B2 (en) * 2009-07-17 2013-04-23 The Invention Science Fund I Llc Maintaining insulators in power transmission systems
US8692537B2 (en) * 2009-07-17 2014-04-08 The Invention Science Fund I, Llc Use pairs of transformers to increase transmission line voltage
US20110011621A1 (en) * 2009-07-17 2011-01-20 Searete Llc, A Limited Liability Corporation Of The State Of Delaware Smart link coupled to power line
JP2013197010A (ja) * 2012-03-22 2013-09-30 Toshiba Corp ガス遮断器
CN103578843A (zh) * 2013-11-08 2014-02-12 西安盟创电器有限公司 不重燃断路器
DE102019212106A1 (de) 2019-08-13 2021-02-18 Siemens Energy Global GmbH & Co. KG Schaltgeräte mit zwei in Reihe geschalteten Unterbrechereinheiten
GB201913695D0 (en) * 2019-09-23 2019-11-06 Oxford Instruments Nanotechnology Tools Ltd Quench protection arrangement
CN111696817A (zh) * 2020-03-25 2020-09-22 天津平高智能电气有限公司 一种高压开关及其壳体
CN112382527B (zh) * 2020-12-01 2023-12-19 郑州大学 一种多断口真空断路器动态电荷补偿的自均压控制方法
EP4468584A1 (de) * 2023-05-25 2024-11-27 Siemens Energy Global GmbH & Co. KG Zellbasierter modularer bremsteller für mittel- und hochspannungsanwendungen
DE102023207755A1 (de) * 2023-08-11 2025-02-13 Siemens Energy Global GmbH & Co. KG Dead-Tank-Hochspannungs-Leistungsschalter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB565410A (en) * 1943-05-01 1944-11-09 William Alexander Mcneill Improvements in and relating to air or gas blast electric circuit breakers
FR1424922A (fr) * 1964-02-18 1966-01-14 English Electric Co Ltd Appareillage de commutation électrique
GB1112745A (en) * 1965-12-03 1968-05-08 Ass Elect Ind Improvements in and relating to circuit breakers
FR2512267A1 (fr) * 1981-08-26 1983-03-04 Alsthom Atlantique Disjoncteur a gaz comprime muni de resistances d'ouverture et de fermeture
EP0117914A2 (de) * 1982-12-09 1984-09-12 Hitachi, Ltd. Leistungsschalter mit paralleler Widerstandsanordnung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS553136A (en) * 1978-06-23 1980-01-10 Hitachi Ltd Breaker
JPS5557219A (en) * 1978-10-25 1980-04-26 Hitachi Ltd Power breaker
JPS58186118A (ja) * 1982-04-23 1983-10-31 株式会社日立製作所 直流しや断器の分圧装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB565410A (en) * 1943-05-01 1944-11-09 William Alexander Mcneill Improvements in and relating to air or gas blast electric circuit breakers
FR1424922A (fr) * 1964-02-18 1966-01-14 English Electric Co Ltd Appareillage de commutation électrique
GB1112745A (en) * 1965-12-03 1968-05-08 Ass Elect Ind Improvements in and relating to circuit breakers
FR2512267A1 (fr) * 1981-08-26 1983-03-04 Alsthom Atlantique Disjoncteur a gaz comprime muni de resistances d'ouverture et de fermeture
EP0117914A2 (de) * 1982-12-09 1984-09-12 Hitachi, Ltd. Leistungsschalter mit paralleler Widerstandsanordnung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2680043A1 (fr) * 1991-08-02 1993-02-05 Alsthom Gec Disjoncteur a coupure multiple equipe de varistances.
EP0536039A1 (de) * 1991-10-02 1993-04-07 Gec Alsthom Sa Ultra-Hochspannungsschalter
FR2682219A1 (fr) * 1991-10-02 1993-04-09 Alsthom Gec Disjoncteur ultra haute tension.
US5304760A (en) * 1991-10-02 1994-04-19 Gec Alsthom Sa Ultra-high-tension circuit-breaker
FR2688623A1 (fr) * 1992-03-13 1993-09-17 Asea Brown Boveri Interrupteur de reacteur.

Also Published As

Publication number Publication date
DE69013295T2 (de) 1995-02-16
ATE112887T1 (de) 1994-10-15
CN1063965A (zh) 1992-08-26
CN1024969C (zh) 1994-06-08
FR2655188A1 (fr) 1991-05-31
CA2030980C (fr) 1994-07-05
JPH03182023A (ja) 1991-08-08
EP0430123B1 (de) 1994-10-12
CA2030980A1 (fr) 1991-05-30
ES2064589T3 (es) 1995-02-01
US5124872A (en) 1992-06-23
BR9006024A (pt) 1991-09-24
FR2655188B1 (fr) 1992-02-07
DE69013295D1 (de) 1994-11-17
JPH06101277B2 (ja) 1994-12-12

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