US3881766A - Voltage overload arrester for a high-voltage switching system - Google Patents

Voltage overload arrester for a high-voltage switching system Download PDF

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Publication number
US3881766A
US3881766A US399351A US39935173A US3881766A US 3881766 A US3881766 A US 3881766A US 399351 A US399351 A US 399351A US 39935173 A US39935173 A US 39935173A US 3881766 A US3881766 A US 3881766A
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US
United States
Prior art keywords
arrester
housing
voltage
switching system
overload
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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
US399351A
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English (en)
Inventor
Rudolf Pratsch
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Siemens AG
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Siemens AG
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Filing date
Publication date
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Publication of US3881766A publication Critical patent/US3881766A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/105—Varistor cores
    • H01C7/108—Metal oxide
    • H01C7/112—ZnO type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/08—Overvoltage arresters using spark gaps structurally associated with protected apparatus
    • 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
    • H02B13/065—Means for detecting or reacting to mechanical or electrical defects

Definitions

  • a voltage overload arrester for a high-voltage switching system of the type including a metallic switching housing containing a gaseous insulating medium, and a metallic overload arrester housing, communicative with the switching housing and containing the same 4 Claims, 2 Drawing Figures VOLTAGE OVERLOAD ARRESTER FOR A HIGH-VOLTAGE SWITCHING SYSTEM BACKGROUND OF THE INVENTION 1.
  • the invention relates generally to high-voltage switching systems, and in particular, to an improved voltage overload arrester for such systems for discharging current surges flowing therethrough.
  • resting mechanisms generally comprise a plurality of spark gaps and voltage dependent discharge resistors coupled in series thereto which are disposed in an electrically nonconductive housing.
  • An arc discharge occurs across the spark gap electrodes at a predetermined voltage threshold level to discharge current surges.
  • the voltage dependent discharge resistors limit the system current surges so that the current produced by a voltage overload is dissipated.
  • the overload arrester In order for the overload arrester to operate properly, it is necessary that the areover threshold voltage of the voltage of the spark gaps remain substantially constant, and it has been found that the spark gaps of such an arrester operate most effectively in a gaseous atmosphere consisting of nitrogen.
  • a voltage overload arrester for a high-voltage switching system of the type including a metallic switching housing containing a gaseous insulating medium, and a metallic overload arrester housing, communicative with the switching housing and containing the same gaseous insulating medium.
  • the improvement of the invention comprises the provision of discharge current resistors, disposed in the arrester housing in a columnar arrangement, which are constructed of an electrically conductive metallic composition having a zinc oxide base, for discharging current surges flowing through the switching system.
  • FIG. 1 is a cross-sectional view of a high-voltage switching system including an improved voltage overload arrester constructed according to the invention.
  • FIG. 2 is a cross-sectional view of another highvoltage switching system illustrating an additional embodiment of an improved voltage overload arrester constructed according to the invention.
  • FIG. 1 there is shown a high-voltage switching system comprising a pair of bus bars 1 and 2 disposed in housings 3 and 4 and coupled to a pair of disconnect switches 5 and 6 disposed above the bus bars.
  • Housings 3 and 4 are part of a metallic switching system housing 18 which encapsulates the components of the installation and contains a gaseous insulating medium.
  • a current transformer 7, an operational grounding switch 10, and a power circuit breaker II are coupled to disconnect switches 5 and 6.
  • the upper terminal of power circuit breaker 11 is coupled to another operational grounding switch I2, a voltage transformer I3, a terminal conductor I5, and an operational grounding switch 14 for the terminal conductor.
  • Voltage overload arrester 16 comprises a metallic housing 17 which is communicative with switching housing 18 and contains the same gaseous insulating medium, which is preferably sulfur hexafluoride.
  • Voltage dependent, discharge current electrical resistance means illustrated in schematic form as a plurality of electrical resistors arranged in columnar fashion in series and disposed axially within housing 17, are coupled to switches 5 and 6 and bus bars 1 and 2.
  • the resistors are constructed of an electrically conductive metallic composition having a zinc oxide base and comprising other metallic oxides in combination therewith.
  • An alloy of metal oxides suitable for constructing the resistors of the voltage overload arrester is disclosed in German Pat. No. 1,765,097.
  • the columnar arrangement of the resistors is the same as silicon carbide resistor arrangements in heretofore known voltage overload arrester systems.
  • Resistors 19 may be disposed in a porcelain or other electrically nonconductive housing.
  • the zinc oxide base material causes the resistors of the arrester to exhibit a pronounced voltage dependency which eliminates the need for arc-discharge of current surges by means of spark gaps. Dissipation of voltage overload current surges in the switching system is thus carried out as a pure electrical conduction process in the discharge resistors, and no arc-over occurs in the arrester.
  • the voltage overload arrester constructed according to the invention has considerably smaller dimensions which is a particularly advantageous feature in switching systems utilizing metallic housings.
  • the elimination of the spark gaps of the arrester permits the arrester to be mounted on the switching system housing in a position which produces optimum effectiveness, such as in the horizontal position illustrated in the drawings adjacent disconnect switch 5.
  • housing l7 may be provided with a feed-through coupling at the ,base thereof.
  • FIG. 2 The embodiment of the invention illustrated in FIG. 2 is similar in all respects to that of FIG. 1 except that housing 17 and the previously described components of the arrester are disposed in a vertical position adjacent switch 14 and terminal conductor 15. This position is also a desirable location for the arrester since it proflduces an optimum protective effect forthe switching system.
  • a high-voltage switching system of the type including a switching housing containing a gaseous insulating medium, and an overload arrester housing, communicative with the switching housing and containing a gaseous insulating medium having a dielectric strength the same as said medium contained in said switching system housing, a voltage overload arrester comprising only discharge current resistance means, disposed in said arrester housing, and constructed of an electrically conductive material having a zinc oxide base, for discharging current surges flowing through prises sulfur hexafluoride.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Thermistors And Varistors (AREA)
US399351A 1972-09-28 1973-09-20 Voltage overload arrester for a high-voltage switching system Expired - Lifetime US3881766A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2248117A DE2248117B2 (de) 1972-09-28 1972-09-28 Überspannungsableiter mit einem gasgefüllten Gehäuse

Publications (1)

Publication Number Publication Date
US3881766A true US3881766A (en) 1975-05-06

Family

ID=5857912

Family Applications (1)

Application Number Title Priority Date Filing Date
US399351A Expired - Lifetime US3881766A (en) 1972-09-28 1973-09-20 Voltage overload arrester for a high-voltage switching system

Country Status (7)

Country Link
US (1) US3881766A (de)
JP (1) JPS4971440A (de)
CH (1) CH555098A (de)
DE (1) DE2248117B2 (de)
FR (1) FR2199214B1 (de)
GB (1) GB1402064A (de)
SE (1) SE397612B (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4262319A (en) * 1979-04-23 1981-04-14 Electric Power Research Institute, Inc. Lightning arrester for use in gas insulated electrical power device
FR2485245A1 (fr) * 1980-06-23 1981-12-24 Gen Electric Varistance a l'oxyde de zinc perfectionnee et parafoudre utilisant de telles varistances
US4396970A (en) * 1981-01-12 1983-08-02 Tii Industries Inc. Overvoltage surge arrester with predetermined creepage path
US4460937A (en) * 1981-05-12 1984-07-17 Tokyo Shibaura Denki Kabushiki Kaisha Gas-insulated switching apparatus
US4468716A (en) * 1981-02-27 1984-08-28 Tokyo Shibaura Denki Kabushiki Kaisha Gas-insulated switchgear
EP0129077A1 (de) * 1983-06-17 1984-12-27 Mitsubishi Denki Kabushiki Kaisha Blitzableiter
US4688136A (en) * 1985-04-04 1987-08-18 Mitsubishi Denki Kabushiki Kaisha Gas insulated switchgear
US4835648A (en) * 1985-03-26 1989-05-30 Mitsubishi Denki Kabushiki Kaisha Gas insulated switchgear
US5124687A (en) * 1989-08-30 1992-06-23 Hitachi, Ltd. Power apparatus, power transmission/distribution unit, and tripping method therefor
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
EP2031718A1 (de) * 2006-06-19 2009-03-04 Mitsubishi Electric Corporation Gasisolierte stromvorrichtung
US20090323242A1 (en) * 2006-07-19 2009-12-31 Hitoshi Kijima Disconnector and overvoltage protection device
US20120187089A1 (en) * 2008-10-27 2012-07-26 Xuanshu Chen High-voltage, super-voltage and heavy current breaker
US20130277334A1 (en) * 2010-12-14 2013-10-24 Javier Mantilla Dielectric Insulation Medium

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0165821B1 (de) * 1984-06-22 1988-11-09 Hitachi, Ltd. Oxid-Widerstand

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2911546A (en) * 1957-11-21 1959-11-03 Gen Electric Electric circuit breaker
US2921168A (en) * 1956-03-19 1960-01-12 Asea Ab High tension air blast circuit breaker comprising a number of breaking units with breaking contacts arranged inside air containers carried by insulator pillars
US3390239A (en) * 1965-02-23 1968-06-25 Gen Electric Electric circuit breaker with voltage-controlling resistances and means for switching the resistances in synchronism
US3777218A (en) * 1971-09-30 1973-12-04 Siemens Ag Metal-clad high-voltage switching system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2921168A (en) * 1956-03-19 1960-01-12 Asea Ab High tension air blast circuit breaker comprising a number of breaking units with breaking contacts arranged inside air containers carried by insulator pillars
US2911546A (en) * 1957-11-21 1959-11-03 Gen Electric Electric circuit breaker
US3390239A (en) * 1965-02-23 1968-06-25 Gen Electric Electric circuit breaker with voltage-controlling resistances and means for switching the resistances in synchronism
US3777218A (en) * 1971-09-30 1973-12-04 Siemens Ag Metal-clad high-voltage switching system

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4262319A (en) * 1979-04-23 1981-04-14 Electric Power Research Institute, Inc. Lightning arrester for use in gas insulated electrical power device
FR2485245A1 (fr) * 1980-06-23 1981-12-24 Gen Electric Varistance a l'oxyde de zinc perfectionnee et parafoudre utilisant de telles varistances
US4396970A (en) * 1981-01-12 1983-08-02 Tii Industries Inc. Overvoltage surge arrester with predetermined creepage path
US4468716A (en) * 1981-02-27 1984-08-28 Tokyo Shibaura Denki Kabushiki Kaisha Gas-insulated switchgear
US4460937A (en) * 1981-05-12 1984-07-17 Tokyo Shibaura Denki Kabushiki Kaisha Gas-insulated switching apparatus
EP0129077A1 (de) * 1983-06-17 1984-12-27 Mitsubishi Denki Kabushiki Kaisha Blitzableiter
US4835648A (en) * 1985-03-26 1989-05-30 Mitsubishi Denki Kabushiki Kaisha Gas insulated switchgear
US4688136A (en) * 1985-04-04 1987-08-18 Mitsubishi Denki Kabushiki Kaisha Gas insulated switchgear
US5124687A (en) * 1989-08-30 1992-06-23 Hitachi, Ltd. Power apparatus, power transmission/distribution unit, and tripping method therefor
US6316742B1 (en) 1999-07-14 2001-11-13 Southern States, Inc. Limited restrike circuit interrupter used as a line capacitor and load switch
US6236010B1 (en) 1999-07-14 2001-05-22 Southern States, Inc. Circuit interrupter including a penetrating electrical contact with grip and release structure
EP2031718A1 (de) * 2006-06-19 2009-03-04 Mitsubishi Electric Corporation Gasisolierte stromvorrichtung
US20090116176A1 (en) * 2006-06-19 2009-05-07 Mitsubishi Electric Corporation Gas-insulated electric power apparatus
US7835140B2 (en) * 2006-06-19 2010-11-16 Mitsubishi Electric Corporation Gas-insulated electric power apparatus
EP2031718A4 (de) * 2006-06-19 2012-03-14 Mitsubishi Electric Corp Gasisolierte stromvorrichtung
CN101305507B (zh) * 2006-06-19 2012-05-23 三菱电机株式会社 气体绝缘电力设备
US20090323242A1 (en) * 2006-07-19 2009-12-31 Hitoshi Kijima Disconnector and overvoltage protection device
US7983014B2 (en) * 2006-07-19 2011-07-19 Hitoshi Kijima Disconnector and overvoltage protection device
US20120187089A1 (en) * 2008-10-27 2012-07-26 Xuanshu Chen High-voltage, super-voltage and heavy current breaker
US20130277334A1 (en) * 2010-12-14 2013-10-24 Javier Mantilla Dielectric Insulation Medium
US8822870B2 (en) * 2010-12-14 2014-09-02 Abb Technology Ltd. Dielectric insulation medium

Also Published As

Publication number Publication date
CH555098A (de) 1974-10-15
DE2248117A1 (de) 1974-04-11
JPS4971440A (de) 1974-07-10
SE397612B (sv) 1977-11-07
DE2248117B2 (de) 1975-03-20
GB1402064A (en) 1975-08-06
FR2199214A1 (de) 1974-04-05
FR2199214B1 (de) 1978-11-10

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