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Mixture of a hydrofluoroolefin and hydrofluorocarbon for improving internal arc resistance in medium- and high-voltage electrical apparatuses

一种氢氟烯烃、电气设备的技术，应用在高压空气断路器、高压/大电流开关、电气元件等方向，能够解决介电强度低等问题

Active Publication Date: 2014-11-05
SCHNEIDER ELECTRIC IND SAS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, SF 6 The main disadvantages are: SF 6 has a global warming potential of 22800 (relative to CO 2 time span of 100 years) (relative to CO 2 over100years) and a residence time in the atmosphere of 3200 years, which makes the SF 6 Become one of the gases with strong greenhouse effect
However, it is still desirable to find usable alternatives to these compounds, which have rather low dielectric strength in negative injection

Method used

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  • Mixture of a hydrofluoroolefin and hydrofluorocarbon for improving internal arc resistance in medium- and high-voltage electrical apparatuses
  • Mixture of a hydrofluoroolefin and hydrofluorocarbon for improving internal arc resistance in medium- and high-voltage electrical apparatuses
  • Mixture of a hydrofluoroolefin and hydrofluorocarbon for improving internal arc resistance in medium- and high-voltage electrical apparatuses

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Embodiment Construction

[0026] The present invention is based on diluent gas ("buffer" gas, such as CO 2 , air, etc.) in the presence or absence of fluoroketones, the application of hydrofluoroalkanes (HFCs) and hydrofluoroolefins (HFOs) having at least 3 carbon atoms.

[0027] Fluoroketones are ketones substituted with fluorine that are non-flammable and have a very small GWP; in particular, the fluoroketones used have five carbon atoms (C5K) and the empirical formula is C 5 f 10 O; and especially decafluoro-2-methylbutan-3-one (decafluoro-2-methylbutan-3-one), which corresponds to the half-expanded formula CF 3 -CO-CF-(CF 3 ) 2 , and the global warming potential GWP=1. C5K is non-toxic to humans, and its average exposure limit value AEV (average exposure value) (the average limit content that most workers can continue to be exposed to regularly for 5 days a week at an 8-hour working frequency without harmful effects) is 1000ppm and The lethal dose LD that causes 50% death in the animal populat...

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Abstract

The invention relates to the use of a mixture including a hydrofluoroolefin and a hydrofluorocarbon, optionally combined with another fluorinated gas and a dilution gas, as an electrical insulation medium and / or an electric-arc extinguishing medium in a medium-voltage electrical apparatus. The invention also relates to a medium- or high-voltage electrical apparatus in which such a mixture provides electrical insulation and / or electric-arc extinguishing.

Description

technical field [0001] The invention relates to the field of electrical insulation and arc extinguishing in medium voltage installations. [0002] More specifically, the present invention relates to the use of mixtures comprising specific olefins (i.e. hydrofluoroolefins with three carbon atoms) and hydrofluorocarbides (also known as hydrofluorocarbides) as arcs in high or medium voltage substation electrical equipment. Use of media for arc insulation and / or arc extinguishing. The mixture may comprise other gases having a very low global warming potential, in particular less than or equal to one. [0003] The invention also relates to medium-voltage or high-voltage substation electrical equipment in which electrical insulation and / or arc extinguishing is ensured by a gas mixture comprising at least one hydrofluoroalkane and one hydrofluoroolefin. [0004] The electrical equipment may in particular be electrical transformers such as main transformers or transformers, gas-insu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/22H01B3/56H02B13/055
CPCH02B13/055H01H33/22H01B3/56H01H33/562H01H33/64H01H2033/566
Inventor D.皮科兹R.马拉登M.弗雷拉达科斯塔
Owner SCHNEIDER ELECTRIC IND SAS
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