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Dielectric-insulation or arc-extinction fluid

A dielectrically insulated, fluid technology that is used in high-voltage applications to solve problems such as harmful

Pending Publication Date: 2022-02-18
HITACHI ENERGY SWITZERLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in high voltage applications, partial discharges cannot be completely avoided and the use of mixtures containing octafluorobutene and oxygen in these applications can lead to relatively rapid degradation of the dielectric insulating fluid with harmful by-products

Method used

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  • Dielectric-insulation or arc-extinction fluid

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0079] decomposition rate

[0080] Test for 2-C in gas mixtures containing carbon dioxide and oxygen 4 HF 7 decomposition rate. Specifically, will contain 4 volume % 2-C 4 HF 7 , 4 vol% O 2 and 92 vol% CO 2 The gas mixture is subjected to a partial discharge test and the resulting decomposition is measured.

[0081] Specifically, the experimental setup consisted of a standard GIS-vessel (volume: 55 L) with a needle-planar electrode arrangement. A total of 10 steel needles (R_100 μm) were connected to a high voltage DC power supply (positive, 0-35 kV). The gap spacing is set to 10mm. The vessel was equipped with a fan to keep the gas mixture homogeneous during the experiment.

[0082] The test results are in figure 1 shown in . Among them, under partial discharge, with perfluoro 2-C 4 f 8 (7mmol / C) compared to the decomposition rate, the measured 2-C 4 HF 7 (0.27mmol / C) had a much lower decomposition rate.

[0083] Dielectric strength

[0084] In addition ...

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Abstract

The present invention relates to a dielectric-insulation or arc-extinction fluid for an apparatus for the generation, the transmission, the distribution and / or the usage of electrical energy, the fluid being a mixture comprising a fluoroolefin and oxygen. According the fluoroolefin is a monohydrofluoroolefin containing from 4 to 5 carbon atoms, the hydrogen atom being bound to a carbon atom of the double bond or directly adjacent to the double bond.

Description

technical field [0001] The invention relates to a dielectric insulating or arc suppressing fluid for use in devices for generating, transmitting, distributing and / or using electrical energy according to claim 1 . [0002] The invention further relates to a device of the mentioned type comprising a housing enclosing an insulating space containing a dielectric insulating or arc suppressing fluid, and the use of the fluid in medium or high voltage applications, in particular high voltage application. Background technique [0003] Gaseous or liquid dielectric insulating media are usually used for the insulation of conductive parts in various equipment, such as switchgear, gas insulated substations (GIS), gas insulated lines (GIL), transformers and others, or insulation of electrical components, such as instruments Transformers, tap changers, and others. [0004] In medium-voltage or high-voltage metal-encapsulated switchgear, for example, the conductive parts are arranged in a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B3/56
CPCH01B3/56H01H33/22H01H2033/566
Inventor V·特帕蒂S·舍埃勒C·多隆D·奥韦尔P·西姆卡B·拉迪萨弗耶维克
Owner HITACHI ENERGY SWITZERLAND AG