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Mixtures of decafluoro-2-methylbutan-3-ketone and carrier gas as electrical insulating and/or arc-extinguishing medium in medium voltage

一种灭弧介质、混合物的技术，应用在电绝缘和灭弧领域，能够解决价格昂贵、爆炸、昂贵等问题

Inactive Publication Date: 2017-01-18
SCHNEIDER ELECTRIC IND SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] However, the main disadvantage of oil arc extinguishers is that they may explode in the event of an arc failure or internal fault
Ambient air arc quenching devices are usually of larger size, expensive and very sensitive to the environment (moisture and contamination), while vacuum bottle arc quenching devices, especially switch disconnectors, are very expensive and not available on the market. rare
[0023] Currently, there is no truly satisfactory SF 6 substitute for

Method used

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  • Mixtures of decafluoro-2-methylbutan-3-ketone and carrier gas as electrical insulating and/or arc-extinguishing medium in medium voltage
  • Mixtures of decafluoro-2-methylbutan-3-ketone and carrier gas as electrical insulating and/or arc-extinguishing medium in medium voltage
  • Mixtures of decafluoro-2-methylbutan-3-ketone and carrier gas as electrical insulating and/or arc-extinguishing medium in medium voltage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Example 1: Applied to medium voltage

[0086] with C5K and CO 2to fill two GIS (Gas Insulated Switchgear, Gas Insulated Switchgear) type devices with a rated voltage of 24kV (hereinafter referred to as devices 1 and 2), which are intended to be used at a minimum operating temperature of -15°C.

[0087] The device 1 has a structure strictly identical to that of the reference FBX24kV device sold by Schneider Electric, in its current commercial version, at a pressure of 130kPa at SF 6 Fill the device.

[0088] Device 2 differs from device 1 in that its shunts have been wrapped with a heat shrink sheath to prevent striking between them and an electric field separator has been added in it.

[0089] Since devices 1 and 2 are determined to be used when the lowest operating temperature is -15°C, the C5K / CO 2 Fill the device with a mixture such that:

[0090] - The C5K / CO 2 The total pressure of the mixture in these devices is equal to 130kPa at 20°C;

[0091] - the partia...

Embodiment 2

[0116] Example 2: Applied to medium voltage

[0117] A device of the GIS type with a rated voltage of 145 kV (hereinafter referred to as device 3) was filled with a mixture of C5K and dry air, intended for use at a minimum service temperature of -30°C.

[0118] Device 3 has a structure strictly identical to that of the reference B65 device sold by Alstom Grid, filled in its current commercial version with SF 6 .

[0119] Since unit 3 is intended to be used at a minimum service temperature of -30°C, fill the unit with a mixture of C5K / dry air such that:

[0120] - The total pressure of the C5K / dry air mixture in this device is equal to 500 kPa at 20°C;

[0121] - the partial pressure of C5K in this device is equal to 12.7kPa at 20°C;

[0122] The molar percentage of C5K is found to be equal to 2.54%.

[0123] The C5K / dry air mixture was filled into Unit 3 using the same procedure as described in Example 1, except that dry air was used instead of CO 2 , and the ratio of the...

Embodiment 3

[0130] Embodiment 3: the selection of the molar percentage of C5K in the mixture is for the influence of the dielectric strength of this mixture

[0131] Fill a series of devices of the same type as previously used device 1 with a mixture of C5K and dry air (minimum operating temperature: -15°C; total pressure of a mixture of C5K / dry air: 130 kPa), while moving from one device to the next A device changes the mole percentage of C5K in the mixture such that the mole percentages of C5K are respectively 0%, 31.2%, 64%, 95%, 100% and 146.8% of the mole percentage M, which means, -15 The proportion of C5K in the gaseous part of the C5K / dry air mixture is at a maximum at 0 °C.

[0132] These devices were then tested for dielectric strength at ambient temperature in a uniform electric field, and the results obtained were compared with those obtained at the same temperature and at a pressure of 130 kPa in SF 6 Compare the results obtained with the tests of devices of the same type of...

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Abstract

The present invention relates to the use of a mixture comprising decafluoro-2-methylbutan-3-one and a carrier gas or diluent gas as an electrical insulation medium and / or an arc extinguishing medium in medium-voltage or high-voltage electrical installations. The invention also relates to medium or high voltage electrical installations in which electrical insulation and / or arc extinguishing is achieved by a mixture comprising decafluoro-2-methylbutan-3-one and a carrier or diluent gas. The invention is applicable to: electrical transformers, gas insulated lines for the transmission or distribution of electric power, busbars, electrical connection / disconnection devices (circuit breakers, switches, switch fuses, insulators, earthing switches, contactors, etc.).

Description

technical field [0001] The invention relates to the field of electrical insulation and arc extinguishing in medium or high voltage electrical installations. [0002] More specifically, the present invention relates to the use of a mixture comprising a specific fluoroketone (i.e. decafluoro-2-methylbutan-3-one) and a carrier gas (e.g. air, nitrogen or carbon dioxide) in medium or high voltage electrical installations As a medium for electrical insulation and / or arc extinguishing. [0003] The invention also relates to medium-voltage or high-voltage electrical installations in which electrical insulation and / or arc extinguishing is achieved by a mixture comprising decafluoro-2-methylbutan-3-one and a carrier gas. [0004] The electrical device, which may in particular be an electrical transformer, such as a power transformer or a measuring transformer, a gas-insulated line (GIL), a busbar set or an electrical connecting / disconnecting device (also called a switchgear), such as a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/22H02B13/055
CPCH01H33/22H01H2033/566H02B13/055H01H33/022H01B3/56
Inventor Y.基菲尔A.吉罗德特D.皮科兹
Owner SCHNEIDER ELECTRIC IND SAS
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