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EP0131922A1 - Dispositif électrique employant un diélectrique gazeux - Google Patents

Dispositif électrique employant un diélectrique gazeux Download PDF

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Publication number
EP0131922A1
EP0131922A1 EP19840108219 EP84108219A EP0131922A1 EP 0131922 A1 EP0131922 A1 EP 0131922A1 EP 19840108219 EP19840108219 EP 19840108219 EP 84108219 A EP84108219 A EP 84108219A EP 0131922 A1 EP0131922 A1 EP 0131922A1
Authority
EP
European Patent Office
Prior art keywords
mole
dielectric
gaseous
electrical apparatus
gaseous dielectric
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.)
Withdrawn
Application number
EP19840108219
Other languages
German (de)
English (en)
Inventor
Shiro Yamauchi
Takeo Yoshioka
Hirotsugu Munemura
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP0131922A1 publication Critical patent/EP0131922A1/fr
Withdrawn legal-status Critical Current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
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/16—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/56—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances gases

Definitions

  • the present invention relates in general to electrical apparatuses which employ a gaseous dielectric, and in particular to an improved electrical apparatus employing a novel gaseous dielectric which has a high dielectric strength and which forms only a small amount of carbon at the time of arcing.
  • C 2 F S CN (1.8 times the dielectric strength of SF 6 )
  • CBrClF 2 (1.4 times the dielectric strength of SF 6 )
  • c-C 4 F 8 (1.4 times the dielectric strength of SF 6 ) are all excellent from the standpoint of dielectric strength, they can not be applied alone as gaseous dielectrics in electrical equipment in which arcing takes place, since they form electrically-conducting carbon powder during arcing.
  • An improved electrical apparatus is of the type comprising a sealed chamber filled with a gaseous dielectric, an electrical conductor disposed in the chamber, and a solid electrically-insulating member which supports the electrical conductor.
  • the improvement resides in the composition of the gaseous dielectric, which comprises a mixture of SF 6 and a saturated fluorocarbon compound, i.e. a fluorocarbon compound having no unsaturated carbon bonds.
  • the amount of SF 6 in the gaseous dielectric is approximately 60 - 99.5 mole % and the amount of the fluorocarbon compound is approximately 0.5 - 40 mole
  • Preferred substances for use as the fluorocarbon compound are C 2 F S CN, CBrCIF 2 , and c- C 4 F 8 .
  • element number 1 is a sealed chamber filled with a gaseous dielectric 2.
  • Elements number 3 are bushings electrically connected to disconnecting switches 4.
  • Element number 5 is a circuit breaker electrically connected to the disconnecting switches 4 by electrical conductors 6.
  • the novel feature of this apparatus is the composition of the gaseous dielectric 2. It comprises approximately 60 - 99.5 mole % of SF 6 and approximately 0.5 - 40 mole % of a saturated fluorocarbon compound.
  • Preferred substances for use as the fluorocarbon compound are C 2 F S CN, CBrClF 2 , and c-C 4 F 8 .
  • the amount of carbon powder formed during the arcing was measured and the results are shown in Figure 4.
  • the mole % of C 2 F 5 CN reached approximately 40%, the slope of the curve abruptly increased, and at mole percentages above this, the amount of carbon powder formed became large. Accordingly, in order to suppress the amount of carbon powder formed during arcing, the amount of a saturated fluorocarbon compound used in the present invention should be no greater than approximately 40 mole %.
  • a similar arcing experiment was carried out using the electrodes illustrated in Figure 6.
  • a rod-shaped electrode 7 having a hemispherical end and a diameter of 30mm was disposed perpendicularly with respect to a plate electrode 8 having a length of 80mm.
  • a 60 Hz AC voltage was applied between the electrodes and the AC breakdown voltages of the gas mixtures were measured using various gap lengths between the electrodes 7 and 8.
  • the results are shown in Figure 5.
  • the mole % of C 2 F S CN is extremely low, a significant increase in breakdown voltage over SF 6 alone can be achieved merely by increasing the separation between the electrodes. Accordingly, the lower limit for a saturated fluorocarbon compound is approximately 0.5 mole%.
  • an electrical apparatus according to the present invention employs a gas mixture which has a higher dielectric strength than SF 6 and which greatly suppresses carbon formation at the time of arcing, for a given rating, an apparatus of smaller size than an apparatus using SF 6 alone as a gaseous dielectric is achievable.
  • an electrical apparatus according to the present invention can have a higher rating than an apparatus of the same physical size which uses SF 6 alone as a gaseous dielectric.

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Insulating Materials (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Installation Of Bus-Bars (AREA)
EP19840108219 1983-07-13 1984-07-12 Dispositif électrique employant un diélectrique gazeux Withdrawn EP0131922A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP58129063A JPS6020406A (ja) 1983-07-13 1983-07-13 ガス絶縁電気装置
JP129063/83 1983-07-13

Publications (1)

Publication Number Publication Date
EP0131922A1 true EP0131922A1 (fr) 1985-01-23

Family

ID=15000165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840108219 Withdrawn EP0131922A1 (fr) 1983-07-13 1984-07-12 Dispositif électrique employant un diélectrique gazeux

Country Status (2)

Country Link
EP (1) EP0131922A1 (fr)
JP (1) JPS6020406A (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012038443A1 (fr) * 2010-09-22 2012-03-29 Alstom Grid Sas Utilisation de melanges sf6/fluorocetone(s) pour l'isolation electrique et/ou l'extinction d'arc electrique
WO2012080269A1 (fr) * 2010-12-16 2012-06-21 Abb Technology Ag Milieu isolant diélectrique
US8680421B2 (en) 2009-06-12 2014-03-25 Abb Technology Ag Encapsulated switchgear
US8709303B2 (en) 2010-12-14 2014-04-29 Abb Research Ltd. Dielectric insulation medium
US8822870B2 (en) 2010-12-14 2014-09-02 Abb Technology Ltd. Dielectric insulation medium
US8916059B2 (en) 2009-06-17 2014-12-23 Abb Technology Ag Fluorinated ketones as high-voltage insulating medium
WO2015040069A1 (fr) 2013-09-20 2015-03-26 Alstom Technology Ltd Appareil électrique moyenne ou haute tension à isolation gazeuse comprenant du dioxyde de carbone, de l'oxygène et de l'heptafluoroisobutyronitrile
US9172221B2 (en) 2011-12-13 2015-10-27 Abb Technology Ag Converter building
US9455562B2 (en) 2011-05-24 2016-09-27 Schneider Electric Industries Sas Electrical apparatus having a gas insulation containing a fluorinated compound
EP2893602B1 (fr) 2012-09-10 2017-05-24 General Electric Technology GmbH Appareil électrique moyenne ou haute tension à faible impact environnemental et à isolation hybride
EP2834818B1 (fr) 2012-04-04 2018-06-06 3M Innovative Properties Company Nitriles fluorés en tant que gaz diélectriques

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2557417B2 (ja) * 1987-10-22 1996-11-27 株式会社東芝 ガス封入電気機器の異常監視方法
JPH0736651B2 (ja) * 1987-11-06 1995-04-19 三菱電機株式会社 電気機器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071461A (en) * 1975-06-23 1978-01-31 Allied Chemical Corporation Gaseous dielectric mixtures for suppressing carbon formation
US4162227A (en) * 1976-02-24 1979-07-24 The United States Of America As Represented By The United States Department Of Energy Dielectric gas mixtures containing sulfur hexafluoride

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071461A (en) * 1975-06-23 1978-01-31 Allied Chemical Corporation Gaseous dielectric mixtures for suppressing carbon formation
US4162227A (en) * 1976-02-24 1979-07-24 The United States Of America As Represented By The United States Department Of Energy Dielectric gas mixtures containing sulfur hexafluoride

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTIONS ON ELECTRICAL INSULATION, vol. EI-15, nr. 2, April 1980, Piscataway (NJ, USA) J.C. DEVINS "Replacement Gases for SF6" pages 81-86 page 82, fig. 1 page 85, table 1, lines 3, 8, 9, 12, 13, 16, 17, 24, 30 *

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9928973B2 (en) 2009-06-12 2018-03-27 Abb Technology Ag Dielectric insulation medium
US8680421B2 (en) 2009-06-12 2014-03-25 Abb Technology Ag Encapsulated switchgear
US8704095B2 (en) 2009-06-12 2014-04-22 Abb Technology Ag Dielectric insulation medium
US9196431B2 (en) 2009-06-12 2015-11-24 Abb Technology Ag Encapsulated switchgear
US8916059B2 (en) 2009-06-17 2014-12-23 Abb Technology Ag Fluorinated ketones as high-voltage insulating medium
WO2012038443A1 (fr) * 2010-09-22 2012-03-29 Alstom Grid Sas Utilisation de melanges sf6/fluorocetone(s) pour l'isolation electrique et/ou l'extinction d'arc electrique
US8822870B2 (en) 2010-12-14 2014-09-02 Abb Technology Ltd. Dielectric insulation medium
US8709303B2 (en) 2010-12-14 2014-04-29 Abb Research Ltd. Dielectric insulation medium
WO2012080269A1 (fr) * 2010-12-16 2012-06-21 Abb Technology Ag Milieu isolant diélectrique
RU2567754C2 (ru) * 2010-12-16 2015-11-10 Абб Текнолоджи Аг Диэлектрическая изолирующая среда
US9257213B2 (en) 2010-12-16 2016-02-09 Abb Technology Ag Dielectric insulation medium
US9455562B2 (en) 2011-05-24 2016-09-27 Schneider Electric Industries Sas Electrical apparatus having a gas insulation containing a fluorinated compound
US9172221B2 (en) 2011-12-13 2015-10-27 Abb Technology Ag Converter building
US10573426B2 (en) 2012-04-04 2020-02-25 3M Innovative Properties Company Fluorinated nitriles as dielectric gases
EP2834818B1 (fr) 2012-04-04 2018-06-06 3M Innovative Properties Company Nitriles fluorés en tant que gaz diélectriques
EP2893602B1 (fr) 2012-09-10 2017-05-24 General Electric Technology GmbH Appareil électrique moyenne ou haute tension à faible impact environnemental et à isolation hybride
US9899125B2 (en) 2012-09-10 2018-02-20 Alstom Technology Ltd Medium- or high-voltage electrical appliance having a low environmental impact and hybrid insulation
EP3047491B1 (fr) 2013-09-20 2017-12-06 General Electric Technology GmbH Appareil électrique moyenne ou haute tension à isolation gazeuse comprenant du dioxyde de carbone, de l'oxygène et de l'heptafluoroisobutyronitrile
US9837801B2 (en) 2013-09-20 2017-12-05 Alstom Technology Ltd Gas-insulated medium or high-voltage electrical apparatus including carbon dioxide, oxygen, and heptafluoro-isobutyronitrile
WO2015040069A1 (fr) 2013-09-20 2015-03-26 Alstom Technology Ltd Appareil électrique moyenne ou haute tension à isolation gazeuse comprenant du dioxyde de carbone, de l'oxygène et de l'heptafluoroisobutyronitrile

Also Published As

Publication number Publication date
JPS6020406A (ja) 1985-02-01

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19841228

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Effective date: 19860124

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Inventor name: YOSHIOKA, TAKEO

Inventor name: YAMAUCHI, SHIRO

Inventor name: MUNEMURA, HIROTSUGU