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Gas-insulated medium- or high-voltage electrical apparatus including heptafluoroisobutyronitrile and tetrafluoromethane

A technology of heptafluoroisobutyronitrile and high-voltage equipment, which is applied to organic gas insulators, high-voltage/high-current switches, electrical components, etc., can solve the problems of environmental sensitivity, large size and high cost, and achieve the effect of non-corrosiveness

Inactive Publication Date: 2017-12-01
GENERAL ELECTRIC TECH GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, devices that suppress arcs in oil have a significant disadvantage of exploding in the event of arc suppression failure or internal failure
Equipment for arc suppression in normal air is usually large in size, high in cost, sensitive to the environment (moisture, pollution), and equipment, especially equipment of the circuit breaker type, is very expensive to have a vacuum circuit breaker, so for voltages higher than 72.5KV equipment is not common in the market

Method used

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  • Gas-insulated medium- or high-voltage electrical apparatus including heptafluoroisobutyronitrile and tetrafluoromethane
  • Gas-insulated medium- or high-voltage electrical apparatus including heptafluoroisobutyronitrile and tetrafluoromethane
  • Gas-insulated medium- or high-voltage electrical apparatus including heptafluoroisobutyronitrile and tetrafluoromethane

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Embodiment Construction

[0100] The invention is based on the use of a specific gas mixture comprising heptafluoroisobutyronitrile and tetrafluoromethane as defined above mixed with optional diluent gas, which has low environmental impact and improved breakdown properties.

[0101] In the present invention, the terms "diluent gas", "neutral gas" or "buffer gas" are equivalent and may be used interchangeably.

[0102] Advantageously, both heptafluoroisobutyronitrile and tetrafluoromethane are completely or almost completely in the gaseous state in the device over the entire temperature range of use of the device. Therefore, it is advisable to select the partial pressure of this compound in the device according to the saturated vapor pressure (PVS) of heptafluoroisobutyronitrile at the lowest operating temperature of the device.

[0103] However, since the device is usually filled with gas at room temperature, the reference pressure P for filling the device with heptafluoroisobutyronitrile at a filling ...

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Abstract

The present invention relates to a medium- or high-voltage electrical apparatus which includes a sealed enclosure containing electrical components and a gas mixture providing electrical insulation and / or the extinction of electric arcs that may occur inside said enclosure, the gas mixture including heptafluoroisobutyronitrile and tetrafluoromethane. The sealed enclosure of the electrical apparatus according to the invention can contain electrical components covered with a solid dielectric layer having a variable thickness.

Description

technical field [0001] The invention relates to the field of electrical insulation and arc suppression in medium or high voltage equipment. [0002] More specifically, the invention relates to the use of a gas mixture comprising heptafluoroisobutyronitrile and tetrafluoromethane as an electrical insulating and / or arc extinguishing gas in medium or high voltage equipment. [0003] More specifically, the present invention relates to the use of insulation with low environmental impact based on gaseous media including heptafluoroisobutyronitrile and tetrafluoromethane as gas for electrical insulation and / or arc suppression in medium or high voltage equipment. [0004] Alternatively, this gas mixture-based insulation can be combined with solid insulation with a low dielectric constant, where the solid insulation is applied in thinner or thicker layers than in a system without solid insulation Breakdown on conductive parts in an electric field with a strong electric field. Because...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B3/56
CPCH01B3/56H01H33/22H02B13/055H01H2033/566
Inventor 扬妮克·基弗尔让-马克·维利姆
Owner GENERAL ELECTRIC TECH GMBH
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