JPH08213782A - Anomaly analyzing equipment for electrical equipment and insulating medium - Google Patents

Abstract

PURPOSE: To dispose of a decomposed component or deteriorated component in an insulating and cooling medium without releasing to the outside from a container housing an electric appliance. CONSTITUTION: An end of a fluid treatment tank 21 is connected to other end of a cooling apparatus 8 through a first valve 17, other end is connected to a container through a second valve 26, and a third valve is connected between the other end of the cooling apparatus 8 and a container 1. And the fluid treatment tank 21 is vacuumed in a closed state of the first valve 17 and the second valve 26, then both the valves 17 and 26 are opened, And the third valve 16 is closed. By doing this, an insulating and cooling medium 3 is circulated in a circulating route comprising a pump 6, the cooling apparatus 8, the fluid treatment tank 21 and the container 1 in this order thereby removing impurities in the fluid treatment tank 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric device using an insulating cooling medium such as SF ₆ gas (sulfur hexafluoride gas) or an inert insulating liquid, and an abnormality analyzing device for the insulating cooling medium.

[0002]

FIG. 17 shows, for example, an insulating cooling medium.
SF ₆ is a configuration diagram of a combined electrical device and a gas and an inert insulating liquid. In FIG. 17, reference numeral 1 is a container in which an electric device body (not shown) is housed, and an SF ₆ gas 2 and an insulating cooling body 3 of a liquid such as perfluorocarbon are sealed therein. Reference numeral 4 is a pipe connected to a position of the container 1 where the insulating cooling medium 3 is present, 5 is a pipe connected to a position of the container 1 where the SF ₆ gas 2 is present, 6 is a pump connected to the pipe 4, and the insulating cooling medium 3 Circulate. 7 is a flange provided on the output side of the pump 6, 8 is a cooler having one end connected to the pump 6 via the flange 7, and the other end is connected to the pipe 5 via the flange 9.

An insulating cooling medium such as SF ₆ gas or perfluorocarbon filled in such an electric device may be contaminated by a decomposed material generated by an internal abnormality or an eluate from an insulating material. When the insulating cooling medium is contaminated, it is necessary to take out the insulating cooling medium from the container for purification in order to restore the function of the electric device and maintain the performance.

As a conventional technique, for the purification of fluorocarbon, a method using an adsorbent is disclosed in Japanese Patent Publication No. 63-12851 and Japanese Patent Laid-Open No. 54147/1992. Japanese Patent Laid-Open No. 3-11023 discloses a method of washing with water. Japanese Patent Laid-Open No. 4-82847 discloses a method of blowing an inert gas. JP-A-4-8284
The method by boiling is disclosed in Japanese Patent No. Also, SF
Regarding the purification of ₆ gases, the method of removing water and SF ₆ decomposition gas with an adsorbent is described in Electric Cooperative Research, Vol. 44, No. 2.
Issue is reported.

Gas-insulated electrical devices are required to be non-flammable. Then, there is cooling as an issue. However, since the gas used for insulation does not have a cooling capacity like insulating oil, it is used together with a coolant such as perfluorocarbon in a large capacity electric device. Since the coil portion and the like are exposed to a higher temperature than the oil-filled electric device, a material having higher heat resistance than the oil-filled electric device is required for the conductor insulation. As examples thereof, polyphenyl sulfone (hereinafter, referred to as PPS), polyethylene terephthalate (hereinafter, referred to as PET), etc. have been used.
The heat resistance of these polymer films is different. In general, the higher the heat resistance of a polymer film, the higher the price.

Regarding the coil temperature, it is considered that the temperature of the portion in direct contact with the conductor is high and the temperature of the portion away from the conductor is low. For example, JP-A-56-8010
No. 8 discloses a sulfur hexafluoride gas-filled transformer having a coil structure coated with a composite insulating layer. However, in this case, the idea of properly using the film comrades according to the heat resistance is not shown. What is the above composite insulation layer?
As shown in, the polymer film 11 is arranged as an inner layer insulation on the side close to the surface of the conductor 10, and the synthetic paper 12 is arranged on the outer layer.

FIG. 19 is a cross-sectional view of a coil which is insulated so that the films are overlapped when the conductor is insulated by the film. FIG. 20 is a sectional view of a coil insulated so that the films do not overlap. 19 and 20.
In the above, 13 is a polymer film that insulates the conductor 10,
Reference numeral 14 denotes a gap formed between the polymer film 13 and the conductor 10 and between the polymer films 13. It is preferable that the dielectric constants of the polymer film 13 and the gap 14 are small. The dielectric constant of the polymer film 13 differs depending on the constituent components. For example, ethylene tetrafluoride is 2.1,
PET is 3.3, PPS is 3.0, PEN polyethylene naphthalate is 2.9, and polyamide is 4.7. However, up to the present, the idea of using polymer films having different dielectric constants in combination has not been proposed.

Further, in a polymer film used for insulation of an electric device, the breakdown voltage is related to the pressure in the insulating gas, but the idea of selectively using it in consideration of the relationship with the pressure has not been proposed.

Further, although the polymer esters used for insulation of electric devices have different degrees, they have the property of being easily deteriorated by heating in the presence of water. However, there has been no proposal to use a polymer film of polymer esters with a water-adsorbing substance.

Further, there is no standardized abnormality analyzer for detecting impurities in the insulating medium. A method of extracting with an organic liquid or the like using a separating funnel can be considered.

[0011]

Since the conventional electric device is constructed as described above, it is expected that it will be difficult to remove the decomposition gas of SF ₆ and the eluate from the insulating material when an internal abnormality occurs. There was a problem that was done.

Generally, as impurities in the insulating cooling medium,
Moisture, air, SF ₆ decomposition products, perfluorocarbon decomposition products, insulating material decomposition products, and elution products from insulating materials are considered. Of these impurities, the decomposition products from the materials are mainly generated by internal abnormalities of electrical equipment, and generally generate a foul odor, so it is necessary to remove them without releasing them to the outside from the viewpoint of safety and environment. is there. Moisture and air that have entered the container due to deterioration over time, and elution from the insulators generally cause the insulation capacity of the insulation cooling medium to decline, so from the perspective of maintaining the performance of electrical equipment. Need to be removed.

In addition, the insulating structure of the electric equipment has a problem that the insulating material having a high heat resistance that comes into contact with the conductor having a high temperature is used for the outer layer insulation having a relatively low temperature. It was

Further, since the dielectric constant of the void portion generated when the film-shaped insulating material is wound around the conductor is small, there is a problem that electrolysis is likely to concentrate in the void portion.

Further, regarding the polymer film material used for insulation of electric equipment, the breakdown voltage is related to the gas pressure in the insulating gas, but the polymer film material has not been selected in consideration of the gas pressure. There was a problem.

Further, although the polymeric esters have different degrees, they tend to be deteriorated by heating in the presence of water, but it is difficult to suppress the deterioration by heating.

Furthermore, there is a problem that it is difficult to detect SF ₆ decomposed products, perfluorocarbon decomposed products, insulating material decomposed products, and elution products from insulating materials.

The present invention has been made to solve the above problems, and provides an electric device capable of removing impurities in an insulating cooling medium in a container accommodating an electric device.

Further, the present invention provides an electric device having a rational insulating structure using a heat resistant insulating material corresponding to temperature.

Further, the present invention provides an electric device for alleviating the electric field concentration in the void portion generated when the insulating film is wound around the conductor.

Also, an electric device in which a polymer film material is selected in consideration of gas pressure is provided.

Also provided is an electric device which suppresses heat deterioration in the presence of water.

Furthermore, an abnormality analysis device for an insulating medium is provided, which is capable of detecting decomposed substances, eluted substances and the like.

[0024]

According to a first aspect of the present invention, there is provided an electric device in which a cooler is connected to a container containing an electric device and an insulating cooling medium is sealed, and the insulating cooling medium is pumped from one end of the cooler. In an electric device for cooling an insulating cooling medium by circulating it to the other end, one end of a fluid processing tank having a fluid processing means for purifying the insulating cooling medium is connected to the other end of the cooler via a first valve, The other end of the treatment tank is connected to the container via the second valve, and the other end of the cooler and the container are connected by the third valve.

In the electric device according to the invention of claim 2, the cooler is connected to the container that houses the electric equipment and the insulating cooling medium is enclosed, and the insulating cooling medium is circulated from one end to the other end of the cooler by the pump. In an electric device for cooling an insulating cooling medium, one end of a fluid processing tank having a fluid processing means for purifying the insulating cooling medium is connected to an output side of a pump via a first valve, and the other end of the fluid processing tank is connected to a first side. It is connected to the container through the second valve, and the output side of the pump and the cooler are connected by the third valve.

According to a third aspect of the present invention, in an electric device, a cooler is connected to a container containing an electric device and containing an insulating cooling medium, and the insulating cooling medium is fed from one end of the cooler to the other end by a first pump. In an electric device for circulating and cooling an insulating cooling medium, one end of a fluid processing tank having a fluid processing means for purifying the insulating cooling medium is connected to a container via a second pump and a first valve to perform fluid processing. The other end of the tank is connected to the container via a second valve.

An electric device according to a fourth aspect of the present invention is the electric device according to any one of the first to third aspects, wherein:
The fluid treatment means is an adsorbent that adsorbs impurities in the insulating cooling medium.

An electric device according to a fifth aspect of the present invention is the electric device according to the fourth aspect, wherein the adsorbent is an octadecylsilane-based material.

An electric device according to the invention of claim 6 is the electric device according to any one of claims 1 to 3, wherein:
The fluid treatment means is a cold trap for condensing and removing impurities in the insulating cooling medium at a low temperature.

An electric device according to the invention of claim 7 is the electric device according to any one of claims 1 to 3, wherein:
The fluid treatment means is a separation membrane for removing air and decomposed gas in the insulating cooling medium.

According to an eighth aspect of the present invention, there is provided an electric device in which an electric device is housed in a container and an insulating cooling medium is sealed in the container, at a position where a liquid insulating cooling medium exists in the container.
A gas cylinder filled with SF ₆ gas having a predetermined pressure is connected via a first valve, a compression transporter is connected to the space of the container via a second valve, and SF ₆ gas is placed in an insulating cooling medium. While bubbling, the fluid existing in the space of the container is compressed by the compression transporter and stored in the fluid storage tank.

According to a ninth aspect of the present invention, there is provided an electric device in which an electric device having a coil in which a conductor is wound is housed in a container, and an insulating cooling medium is sealed in the electric device. A second polymer film having a lower heat resistance than a material in which the first insulating layer is formed of the first polymer film or polymer fiber and the first insulating layer is formed as an outer layer of the first insulating layer. The insulating layer is formed.

An electric device according to a tenth aspect of the present invention is the electric device according to the ninth aspect, wherein the first polymer film is polyphenylsulfone (PPS), the polymer fibers are aromatic polyamide, and the second device is The polymer film is a polyethylene naphthalate (PEN) or polyethylene terephthalate (PET).

An electric device according to an eleventh aspect of the present invention accommodates an electric device having a coil in which a conductor is wound in a container, and S
In an electric device enclosing an insulating cooling medium of F ₆ gas and liquid, a first insulating layer is formed on a surface of a conductor by a first polymer film having a low dielectric constant, and a first insulating layer is formed on an outer layer of the first insulating layer. The second insulating layer is formed of a second polymer film having a higher dielectric constant than that of the above polymer film.

An electric device according to a twelfth aspect of the present invention accommodates an electric device having a coil in which a conductor is wound in a container,
In an electric device in which an insulating cooling medium is enclosed, the conductor is insulated with a polymer fiber, and the inside of the container is set to 1 atm or more.

In the electric device according to a thirteenth aspect of the invention, the cooler is connected to a container that houses the electric equipment and the insulating cooling medium is sealed, and the insulating cooling medium is circulated to the cooler by a pump to cool the insulating cooling medium. In the electric device, the electric equipment is insulated with a polymer film that easily deteriorates in a moisture atmosphere, and a fluid treatment tank equipped with a dehydrating adsorbent is disposed in the flow path of the insulating cooling medium circulating in the cooler. Is.

According to a fourteenth aspect of the present invention, in the electric device, a cooler is connected to a container that houses the electric equipment and the insulating cooling medium is enclosed, and the insulating cooling medium is circulated to the cooler by a pump to cool the insulating cooling medium. In the electric device, a fluid treatment tank equipped with an adsorbent using an octadecylsilane-based material is provided in series in the flow path of the insulating cooling medium so as to be attachable / detachable with a pair of valves arranged at both ends. .

An electric device according to a fifteenth aspect of the present invention is the electric device according to any one of the first to fourteenth aspects, wherein the insulating cooling medium is SF ₆ gas.

An electric device according to a sixteenth aspect of the present invention is the electric device according to any one of the first to fourteenth aspects, wherein the insulating cooling medium is SF ₆ gas and an inert insulating liquid.

In the insulating medium abnormality analyzer according to the seventeenth aspect of the present invention, a liquid insulating medium containing a polar compound such as a decomposed product or a degraded product of a substance is housed in a first container to adsorb the polar compound. The insulating medium is fed to the adsorbent by the first pump, and the polar organic solvent contained in the second container is fed to the adsorbent by the second pump to extract the polar compound adsorbed on the adsorbent. It is composed.

In the insulating medium abnormality analyzer according to the eighteenth aspect of the present invention, a liquid insulating medium containing a polar compound such as a decomposed product or a degraded product of a substance is housed in a first container to adsorb the polar compound. The insulating medium is sent to the adsorbent by the first pump, the polar organic liquid stored in the second container is sent to the adsorbent by the second pump, and the polar compound adsorbed on the adsorbent is extracted to obtain the polarity. The polar compound is detected by an ultraviolet detector provided in the flow path of the polar organic liquid containing the compound.

[0042]

In the electric device according to the invention of claim 1, one end of the fluid treatment tank is connected to the other end of the cooler via the first valve,
The other end of the fluid treatment tank is connected to the container through the second valve, and the other end of the cooler and the container are connected by the third valve, whereby the first valve and the second valve are connected. The inside of the fluid treatment tank is evacuated with the valve closed. After that, the first valve and the second valve are opened, the third valve is closed, and the insulation cooling medium is circulated in the normal path of the pump, the cooler, the fluid treatment tank and the container, thereby performing the insulation cooling in the fluid treatment tank. Impurities in the medium are removed.

In the electric device according to the second aspect of the present invention, one end of the fluid treatment tank is connected to the output side of the pump via the first valve, and the other end of the fluid treatment tank is connected to the container via the second valve. By connecting and connecting the output side of the pump and the cooler with a third valve, the inside of the fluid treatment tank is evacuated with the first valve and the second valve closed. afterwards,
By opening the first valve and the second valve and closing the third valve, and circulating the insulating cooling medium in the route of the pump, the fluid treatment tank and the container, impurities in the insulating cooling medium are removed in the fluid treatment tank. Remove.

In the electric device according to the third aspect of the present invention, one end of the fluid treatment tank is connected to the container via the second pump and the first valve, and the other end of the fluid treatment tank is connected via the second valve. The container is connected to the container to evacuate the inside of the fluid treatment tank with the first valve and the second valve closed. Then, by opening the first valve and the second valve and circulating the insulating cooling medium between the fluid processing tank and the container by the second pump, impurities in the insulating cooling medium are removed by the fluid processing tank. Remove.

An electric device according to a fourth aspect of the present invention is the electric device according to any one of the first to third aspects, wherein:
By using the fluid treatment means as an adsorbent, impurities in the insulating cooling medium are adsorbed.

According to a fifth aspect of the present invention, in the electric device according to the fourth aspect, the adsorbent is an octadecylsilane-based material to adsorb impurities in the insulating cooling medium.

An electric device according to a sixth aspect of the present invention is the electric device according to any one of the first to third aspects, wherein:
By using the cold trap as the fluid treatment means, impurities in the insulating cooling medium are condensed and removed at a low temperature.

An electric device according to the invention of claim 7 is the electric device according to any one of claims 1 to 3, wherein:
By using the separation membrane as the fluid treatment means, air and decomposed gas in the insulating cooling medium are removed.

In the electric device according to the invention of claim 8, a gas cylinder filled with SF ₆ gas having a predetermined pressure is connected via a first valve to a position of the container where the liquid insulating cooling medium exists, A compression transporter is connected to the space of the container through the valve of 2, and while SF ₆ gas is bubbled through the insulating cooling medium, the fluid existing in the space of the container is compressed by the compression transporter to a fluid storage tank. Due to the storage, the impurities in the insulating cooling medium are compressed by the compression transporter together with the SF ₆ gas and the vapor of the insulating cooling medium and recovered in the fluid storage tank.

In the electric device according to a ninth aspect of the present invention, the first insulating layer is formed on the surface of the conductor with the first polymer film or polymer fiber having high heat resistance, and the first insulating layer is formed on the outer surface of the first insulating layer. By forming the second insulating layer from the second polymer film having a lower heat resistance than the material forming the first insulating layer, the second insulating film can be formed of a heat resistant material corresponding to the operating temperature.

An electric device according to a tenth aspect of the present invention is the electric device according to the ninth aspect, wherein the first polymer film is polyphenylsulfone (PPS), the polymer fibers are aromatic polyamide, and the second polymer film is aromatic polyamide. Since the polymer film is polyethylene naphthalate (PEN) or polyethylene terephthalate (PET), it can be made of a heat resistant material corresponding to the operating temperature.

According to an eleventh aspect of the invention, in the electric device, a first polymer film having a low dielectric constant is formed on the surface of the conductor to form a first insulating layer, and the first polymer is formed as an outer layer of the first insulating layer. By forming the second insulating layer with the second polymer film having a higher dielectric constant than the film, SF ₆ gas is filled in the void formed between the conductor and the first insulating layer, and the dielectric constant of the void is increased. Since it is almost 1, the balance of the dielectric constant is improved by reducing the dielectric constant of the first insulating layer.

In the electric device according to the twelfth aspect of the present invention, the conductor is insulated with the polymer fiber and the pressure in the container is set to 1 atm or more, so that the gas density is increased and the withstand voltage is improved.

According to a thirteenth aspect of the present invention, an electric device is insulated with a polymer film which easily deteriorates in a moisture atmosphere, and an insulating cooling medium circulating in a cooler is provided with a dehydrating adsorbent. By disposing the fluid treatment tank, it is possible to suppress the heat deterioration of the polymer material that is easily heat deteriorated in the atmosphere in the presence of water.

According to a fourteenth aspect of the present invention, in the electric device according to the fourteenth aspect, a pair of flanges having a fluid treatment tank having an adsorbent containing an octadecylsilane material in series with a cooler in a flow path of an insulating cooling medium are provided at both ends. By being provided detachably,
Impurities in the insulating cooling medium adsorbed by the adsorbent can be recovered and analyzed.

An electric device according to a fifteenth aspect of the present invention is the electric device according to any one of the first to fourteenth aspects, in which SF ₆ gas is used as an insulating cooling medium to maintain a predetermined insulating performance. .

An electric device according to a sixteenth aspect of the present invention is the electric device according to any one of the first to fourteenth aspects, wherein the insulating cooling medium is SF ₆ gas and an inert insulating liquid. Maintains insulation and cooling performance.

According to a seventeenth aspect of the present invention, there is provided an insulating medium abnormality analyzing apparatus, wherein a liquid insulating medium containing a polar compound such as a decomposition product or a degradation product of a substance is contained in a first container, and adsorption is performed to adsorb the polar compound. An insulating medium is fed to the agent by a first pump, and a polar organic solvent contained in a second container is fed to the adsorbent by a second pump to extract polar compounds adsorbed on the adsorbent. By doing so, the polar compound adsorbed on the adsorbent is analyzed to determine whether or not there is an abnormality in the insulating medium.

In the insulating medium abnormality analyzer according to the eighteenth aspect of the present invention, a liquid insulating medium containing a polar compound such as a decomposed product or a degraded product of a substance is contained in the first container, and adsorption is performed to adsorb the polar compound. The insulating medium is fed to the agent by the first pump, the polar organic liquid housed in the second container is fed to the adsorbent by the second pump, and the polar compound adsorbed on the adsorbent is extracted. The polar compound extracted in the polar organic solvent is detected by the ultraviolet detector by being configured to detect the polar compound by the ultraviolet detector provided in the flow path of the polar organic liquid containing the.

[0060]

【Example】

Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. In FIG. 1, 1 to 9 are the same as conventional ones. 1
4, 15 are valves connected between the cooler 8 and the flanges 7 and 9, 16 is a valve connected between the flange 9 and the container 1 through the pipe 5, and 17 is flange 9 and the valve 16
A valve whose one end is connected to the valve 17, a flange 18 which is connected to the other end of the valve 17 through a pipe 19, a valve 20 which is connected to the flange 18 and one end, and a valve 21 whose one end is the valve 2
A fluid treatment tank connected to the other end of 0 is provided with a fluid treatment means for removing impurities by an adsorbent, a cold trap, or a gas separation membrane.

The adsorbent is an eluate from the insulator, SF
₆ Decomposition products, perchlorocarbon decomposition products, and insulation material decomposition products are removed. Octadecylsilane-based materials, activated carbon, zeolite or activated alumina are used. In particular, when it is necessary to remove the malodorous substance, an oxidizing / neutralizing / catalyst type adsorbent such as Purelite (registered trademark) manufactured by Nippon Kagaku Kogyo Co., Ltd. is used. A cold trap is used to remove water. Further, a gas separation membrane is used to remove air and low-molecular-weight decomposed gas. Then, depending on the situation, a plurality of adsorbents or separation membranes are used.

22 is a valve whose one end is connected to the other end of the fluid processing tank 21, 23 is a flange whose one end is connected to the other end of the valve 22, and 24 is a flange whose one end is connected to the other end of the flange via a pipe 25. , 26 are valves whose one end is connected to the other end of the flange 24 and whose other end is connected to the container 3 through the pipe 4a, and 27 is a valve whose one end is connected between the flanges 23 and 24.

Next, the operation will be described. In FIG. 1, the SF ₆ gas 2 and the insulating cooling medium 3 in the container 1 are
In the circuit of the container 1, the pipe 4, the pump 6, the valve 14, the cooler 8, the valves 15 and 16, the pipe 5 and the container 1, the pump 6
Is constantly circulating. In this case, valves 17, 26
Is closed so that the SF ₆
The gas 2 and the insulating cooling medium 3 do not circulate.

When refining the SF ₆ gas 2 dissolved in the insulating cooling medium 3 and the insulating cooling medium 3, the valve 27 is used.
Connect a vacuum pump (not shown) to the valves 20, 2
Open 2,27. Then, a vacuum pump (not shown) evacuates the system of the pipes 19 and 25 between the valves 17 and 26 and the fluid processing tank 21. When the evacuation is completed, the valve 27 is closed and the valve 26 is opened to introduce the insulating cooling medium 3 into the system. Then, when the valve 16 is closed and the valve 17 is opened, the insulating cooling medium 3 in the container 1 is closed.
By operating the pump 6, the pipe 6, the pump 6, the valve 14, the cooler 8, the valves 15, 17, 19,
The fluid is circulated from 20, the fluid processing tank 21, the valves 22 and 26 to the container 1 through the pipe 4a.

As described above, the insulating cooling medium 3 in which the SF ₆ gas in the container 1 is dissolved is circulated in the fluid processing tank 21 by the pump 6, so that the insulating cooling medium 3 does not come into contact with the outside air. Impurities and the like having an offensive odor dissolved in 3 can be removed by an adsorbent as a fluid treatment means. The adsorbent that has adsorbed impurities is
Is closed and the fluid processing tank 21 is separated from the flanges 18 and 23 and replaced, and impurities and the like are analyzed. Moisture can also be removed by using a cold trap as the fluid treatment means. Further, air and low-molecular weight decomposed gas can be removed by using a gas separation membrane as a fluid treatment means. Furthermore, it Keep has been described with respect to those encapsulating the SF ₆ gas 2 and the insulating coolant 3 in liquid in the container 1, in the case of electrical equipment of small volume for insulation and cooling only SF ₆ gas You can also

In the first embodiment described above, the fluid treatment tank 21 is always attached to the container 1 through the valves 17 and 24. However, the insulating cooling medium 3 is always removed by the flanges 18 and 23. It may be attached when purification of is required. Further, the insulating cooling medium 3 can be processed by circulating the insulating cooling medium 3 in series in the cooler 8 and the fluid treatment tank 21 even while the electric device is operating.

Example 2. FIG. 2 is a configuration diagram of the second embodiment. In FIG. 2, 28 is a valve connected between the flange 23 and the output side of the pump 6.

In FIG. 2, when refining the insulating cooling medium 3 in which the SF ₆ gas 2 is dissolved, a vacuum pump (not shown) is connected to the valve 27 while the valves 17 and 28 are closed, and the valves 20 and Open 22. Then, by a vacuum pump (not shown), both valves 17 including the fluid processing tank 21,
Evacuate between 28. When the evacuation is completed, the valve 27 is closed and the valves 20, 22, and 28 are opened, and the insulating cooling medium 3 is introduced into the evacuated system. Then, after closing the valves 14 and 15, by operating the pump 6, the insulating cooling medium 3 in the container 1 is transferred from the pipe 4 to the pump 6,
Valves 28, 22, fluid treatment tank 21, valves 20, 1
It circulates in the container 1 through 7, 16 and the pipe 5.

As described above, the insulating cooling medium 3 bypasses the cooler 8 by the valves 17 and 28 and circulates in the fluid treatment tank 21, so that the insulating cooling medium 3 is insulated without contact with the outside air. Impurities contained in the cooling medium 3 can be removed. Various impurities and the like can be removed by providing the fluid treatment tank 21 with a fluid treatment means composed of an adsorbent, a cold trap, a gas separation membrane, or the like according to the purpose. Also, by closing the valves 17 and 28 and disconnecting them from the flanges 18 and 23,
The fluid treatment tank 21 may be removed during the operation of the electric device.

Example 3. FIG. 3 is a configuration diagram of the third embodiment. In FIG. 3, 29 is a pipe having one end connected to a position where the insulating cooling medium 3 of the container 1 is present, and 30 is a pipe 2 having one end.
9 is a valve connected to the other end, 31 is a flange connected to the other end of the valve 30, 32 is a valve whose one end is connected to the flange 31, 33 is a valve whose one end is connected to the other end of the valve 32, and 34 is both valves The insulating cooling medium 3 in the container 1 is connected to the fluid treatment tank 2 by a pump whose suction side is connected between 32 and 33.
Send to 1. Reference numeral 35 is a pipe having one end connected to the position where the SF ₆ gas 2 exists in the container 1, and the other end has valves 17 and 20.
It is connected to the fluid processing tank 21 via.

In FIG. 3, when refining the insulating cooling medium 3 in which the SF ₆ gas 2 is dissolved, a vacuum pump (not shown) is connected to the valve 33, and the valves 20, 32, 33 are opened. Then, a vacuum pump (not shown) draws a vacuum between the valves 17 and 30 including the insulating fluid tank 21. When the evacuation is completed, the valve 33 is closed and the valve 30 is opened to introduce the insulating cooling medium 3 into the evacuated system. Then, by opening the valve 17 and operating the pump 34, the insulating cooling medium 3 in the container 1 is transferred from the pipe 29 through the valves 30, 32, the pump 34, the fluid treatment tank 21, the valves 20, 17 and the pipe 35 to the container. Cycle to 1.

With the above configuration, the SF
Impurities can be treated without the insulating cooling medium 3, which is a fluid such as ₆ gas 2 and perfluorocarbon, coming into contact with the outside air.
Further, since the fluid processing tank 21 is independent of the circulation flow path of the cooler 8, the processing flow rate of the insulating cooling medium 3 can be easily adjusted.

In the third embodiment, the valves 17, 30
By closing and disconnecting the flanges 18 and 31, the fluid treatment tank 21 can be removed while the electric device is in operation. Further, even when the insulating cooling medium 3 is circulated in the cooler 8 to operate the electrical equipment, the insulating cooling medium 3 can be processed in parallel in the fluid treatment tank 21.

Example 4. FIG. 4 is a configuration diagram of the fourth embodiment. In FIG. 4, 36 is a gas cylinder filled with SF ₆ gas, 37 is a valve provided between the flange 31 and the gas cylinder 36, 38 is a pressure regulator provided between the gas cylinder 36 and the valve 37. Adjust the gas pressure that comes out. 39 is the flange 18 via the valve 40
The compressed impure gas and vaporizable impurities in the container 1 are compressed and collected together with the SF ₆ gas 2 by the compression transporter connected to.
Reference numeral 41 is a fluid storage tank, which stores the recovered material recovered by the compression transporter 39. 42 and 43 are valves.

In FIG. 4, when refining the SF ₆ gas 2 and the insulating cooling medium 3, the compression transporter 39 is operated to open the valves 17 and 40. Then, by adjusting the gas pressure of the SF ₆ gas exiting from the cylinder 36 by the pressure regulator 38, feeding the SF ₆ gas to the container 1 by opening the valve 30, 37.
As a result, the SF ₆ gas in the gas cylinder 36 is sent into the insulating cooling medium 3 and bubbled. At this time, the dissolved impure gas and vaporizable impurities in the insulating cooling medium 3 are released into the SF ₆ gas 2 in the container 1. And
Along with the SF ₆ gas 2 in the container 1 and the vapor of the insulating cooling medium 3, the fluid is stored in the fluid storage tank 41 after being compressed by the compression transporter 39.
Will be collected.

By continuing this operation, the impurities contained in the SF ₆ gas 2 and the insulating cooling medium 3 in the container 1 can be removed. Further, since the insulating cooling medium 3 is condensed in the fluid storage tank 41, this is taken out to remove impurities. However, the fluid treatment tank 2 shown in the first to third embodiments is disposed between the compression transporter 39 and the fluid storage tank 41.
By disposing 1, the impurities in the insulating cooling medium 3 can be treated at the same time.

In the fourth embodiment, the valves 17 and 3 are normally operated.
0 may be closed and the gas cylinder 36, the compression transporter 39, and the fluid storage tank 41 may be separated from the container 1 by the flanges 18 and 31.

Example 5. FIG. 5 is a configuration diagram of the fifth embodiment. In FIG. 5, 1 to 9 are the same as conventional ones.
The container 1 is filled with the SF ₆ gas 2 and the insulating cooling medium 3. Reference numeral 44 denotes an electric device including a transformer housed in the container 1, which includes an iron core 44a, a coil 44b, and a lead wire 44c.
And a bushing 44d.

FIG. 6 is a sectional view of the coil 44b shown in FIG. In FIG. 6, reference numeral 45 denotes a conductor, and 46 denotes a first insulating tank having a high heat resistance arranged on the side close to the conductor 45, which is a polymer film such as polyphenylsulfone (PPS) or a polymer fiber such as aromatic polyamide. Is. Reference numeral 47 denotes a second insulating layer having a lower heat resistance than the first insulating layer 46, which is disposed as an outer layer of the first insulating layer 46, and is polyethylene naphthalate (PEN) or polyethylene terephthalate (PE).
T) and other polymer films.

By configuring as described above, the conductor 4
A material having high heat resistance is used for the first insulating layer 46 that is in contact with the first insulating layer 4 and the second insulating layer 47 on the outer layer side is the first insulating layer 4
Since a material lower than 6 is used, there is no thermal problem of the insulating member and a rational insulating design can be achieved.

FIG. 7 is a sectional view of the lead wire 44c of FIG. In FIG. 7, 48 is a lead conductor, and 49 is an insulating layer made of a polymer film having relatively low heat resistance, which is polyethylene naphthalate (PEN) or polyethylene terephthalate (PET). As described above, the lead wire 4
Since 4c has a lower temperature than the coil 44b, a polymer film having relatively low heat resistance can be used.

Example 6. FIG. 8 is a cross-sectional view of another embodiment of the coil 44b shown in FIG. 5 of the fifth embodiment, in which films are stacked and wound to form an insulating layer. In FIG. 5 and FIG. 8, 50 is a conductor, 51 is the first insulating layer arranged on the surface side of the conductor 50, and polymer films having a low dielectric constant are superposed and wound. 52 is the first insulating layer 51 and the conductor 5
It is a void portion generated between 0 and 0. 53 is the first insulating layer 5
The second insulating layer is a polymer film having a higher dielectric constant than the polymer film of the first insulating layer 51.

FIG. 9 shows a coil 44b shown in FIG. 5 of the fifth embodiment.
FIG. 7 is a cross-sectional view of another example, in which an insulating layer is formed without overlapping films. In FIGS. 5 and 9, 54
Is a first insulating layer arranged on the front surface side of the conductor 50, and is formed by winding polymer films having a low dielectric constant at predetermined intervals without overlapping. Reference numeral 55 denotes a second insulating layer wound around the outer layer of the first insulating layer 54 at a predetermined interval, which is a film having a higher dielectric constant than the polymer film of the first insulating layer 54. 56 is the first
It is a void portion generated between the insulating layers 54.

In the above structure, since the voids 52 and 56 are filled with SF ₆ gas, the permittivity of the voids 52 and 56 is almost 1. Therefore, by reducing the permittivity of the first insulating layers 51 and 54 in contact with the voids 52 and 56, the balance of the permittivity is improved, and the withstand voltage characteristic is improved.

Example 7. FIG. 10 is a sectional view of another embodiment of the coil 44b shown in FIG. 5 of the fifth embodiment. In FIGS. 5 and 10, reference numeral 57 is a polymer fiber such as an aromatic polyamide that insulates the conductor 45. FIG. 11 is a breakdown voltage characteristic diagram showing the relationship between the insulation thickness of the aromatic polyamide fiber and the insulation (AC) breakdown voltage. Generally, in the case of fiber paper, since there are voids between the fibers, the withstand voltage is low in a gas with low dielectric strength such as nitrogen. However, the withstand voltage increases in a gas having high dielectric strength such as SF ₆ gas. Further, as the pressure becomes higher, the gas density becomes higher and the withstand voltage becomes 0.
It rises in proportion to the 8th power. Therefore, in the case of insulating paper such as aromatic polyamide containing many voids such as fiber paper, 1
Sufficient withstand voltage characteristics can be obtained in the atmosphere of high pressure gasified SF ₆ gas above atmospheric pressure.

Example 8. FIG. 12 is a configuration diagram of the eighth embodiment. In FIG. 12, a coil 44e is insulated by a polymer film such as polyethylene naphthalate (PEN) or polyethylene terephthalate (PET). Reference numeral 58 is a liquid processing tank containing a dehydrating adsorbent such as Zeolum, silica, or alumina.
Are arranged in series with the cooler 8 so as to be circulated by the pump 6.

Polyester materials such as PEN and PET are easily deteriorated by heating in an atmosphere containing water. The degree depends on the type of polymer material, PEN and PE
With T, PET is more likely to be deteriorated by heating. However, these polymer materials are less likely to deteriorate in an environment without water. Therefore, by disposing the fluid treatment tank 58 provided with the dehydrating adsorbent in the flow path of the insulating cooling medium 3, it is possible to suppress the heat deterioration of the polyester polymer material.

Example 9. FIG. 13 is a configuration diagram of the ninth embodiment. In FIG. 9, reference numeral 59 denotes a fluid treatment tank provided with an adsorbent of octadecylsilane-based material, which is arranged between the pump 6 and the cooler 8. Reference numerals 60 and 61 are flanges provided at both ends of the fluid treatment tank 59, 62 is a valve disposed between the pump 6 and the flange 60, and 63 is a valve disposed between the fluid treatment tank 59 and the cooler 8.

In the above structure, the decomposed products and deteriorated components in the insulating cooling medium 3 in the container 1 in which the electric equipment is housed are adsorbed and concentrated by the adsorbent in the fluid treatment tank 59. The presence or absence of abnormality can be determined by closing both valves 62 and 63 and then separating them from both flanges 60 and 61 to remove the fluid treatment tank 59, remove the components adsorbed by the adsorbent, and perform analysis.

In each of the above embodiments, the insulating structure is polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyfinyl sulfone (PP).
Although S) and the aromatic polyamide fiber paper have been described, the same effect can be expected when other film materials having equivalent performance are used.

Example 10. FIG. 14 is a block diagram of an insulating medium abnormality analysis apparatus according to the tenth embodiment. In FIG. 14, 6
Reference numeral 4 is a container for accommodating a nonpolar liquid insulating medium 65 such as fluorocarbon to be analyzed. 66 is a pump for feeding the insulating medium 60, 67 is a fluid treatment tank connected in series with the pump 66, and is provided with an adsorbent made of octadecylsilane-based material. Pipes 68 and 69 are connected to each other so that the container 64, the fluid treatment tank 67, and the pump 66 form a circulation circuit for the insulating medium 65.

In the above structure, the nonpolar insulating medium 65 is used.
Does not adsorb to the adsorbent composed of octadecylsilane-based material, but polar compounds having polarity such as decomposition products and deterioration products are adsorbed and concentrated. Since the polar compound has a property of being easily dissolved in the polar organic liquid, the insulating medium 6 is used as the adsorbent.
After circulating 5, the polar organic liquid such as methyl alcohol may be circulated to the adsorbent instead of the insulating medium 65 to extract the concentrated polar compound.

As described above, the components adsorbed on the adsorbent of the octadecylsilane-based material and concentrated can be analyzed, and abnormalities can be determined from decomposed products and deteriorated components.

Example 11. FIG. 15 is a block diagram of an insulating medium abnormality analyzer according to the eleventh embodiment. In FIG. 15, 7
0 is a valve arranged between the container 64 and the fluid treatment tank 67, 71 is a valve arranged between the fluid treatment tank 67 and the pump 66, 72 is a container containing an organic liquid 73 such as methyl alcohol, and 74 is A pump for feeding the organic liquid 73,
75 is a valve arranged between the pump 69 and the fluid treatment tank 67, 76 is a valve arranged between the fluid treatment tank 67,
Reference numeral 77 is an ultraviolet ray detector arranged between the fluid treatment tank 67 and the container 64. Pipes 78 and 79 are connected to each other so that the container 72, the ultraviolet ray detector 77, the fluid treatment tank 67, and the pump 74 form a circulation circuit for the organic liquid 73. It should be noted that the container 64 may contain electrical equipment.

As described above, the decomposition product and the deterioration component adsorbed and concentrated by the octadecylsilane-based adsorbent can be extracted into the methanol layer, and the ultraviolet ray detector 77 can perform the abnormality analysis.

In the above-mentioned Examples 10 and 11, the extraction of decomposed products and deteriorated components in the fluorocarbon was mainly explained, but the same effect is expected when applied to the analysis of polar substances in nonpolar solvents. To be done.

Example 12. FIG. 16 is a flowchart of the twelfth embodiment. In FIG. 16, the presence / absence of abnormality of the electric device and the position of abnormality of the decomposed product or the deterioration component are located. That is, in FIG. 16, SF ₆ gas in the container accommodating the electric device is sampled in step S ₁ . Then, in step S ₂ , the decomposition component of the insulating gas such as SF ₆ gas is analyzed as a seed by gas chromatography. Next, it is determined whether there is an abnormality in step S _3. Here, performing a normal operation if it is determined that the normal (step S _4). If it is determined to be abnormal, and Jito the insulating medium of the liquid in step S _5, to analyze the degradation products and degradation components of the polymer film or the like, not vaporized in an insulating medium by ion chromatography (step S _6). The presence or absence of an abnormality and the location of the abnormality can be determined by the above steps S _{1 to} S ₆ (step S ₇ ).

[0098]

According to the invention of claim 1, after the inside of the fluid treatment tank is evacuated with the first valve and the second valve closed, the first valve and the second valve are removed. Open The third valve is closed and the insulating cooling medium is circulated in the path of the pump, the cooler, the fluid treatment tank and the container, so that the impurities in the insulating cooling medium are removed in the fluid treatment tank without being released to the outside. be able to.

According to the invention of claim 2, after the inside of the fluid treatment tank is evacuated with the first valve and the second valve closed, the first valve and the second valve are opened. Impurities in the insulating cooling medium can be removed in the fluid treatment tank by closing the valve 3 and circulating the insulating cooling medium in the path of the pump, the fluid treatment tank and the container.

According to the invention of claim 3, by connecting the other end of the fluid treatment tank to the container through the second valve,
After the inside of the fluid treatment tank is evacuated with the first valve and the second valve closed, the first valve and the second valve are opened, and the fluid treatment tank and the container are opened by the second pump. By circulating the insulating cooling medium in between, the impurities in the insulating cooling medium can be removed in the fluid treatment tank.

According to the invention of claim 4, in the electric device according to any one of claims 1 to 3, the fluid treatment means is an adsorbent, so that the impurities in the insulating cooling medium are adsorbent. Can be adsorbed and removed.

According to the invention of claim 5, in the electric device according to claim 4, the adsorbent is an octadecylsilane-based material, so that the impurities in the insulating cooling medium are adsorbed and removed by the adsorbent. You can

According to the invention of claim 6, in the electric device according to any one of claims 1 to 3, the fluid treatment means is a cold trap, whereby impurities in the insulating cooling medium are condensed at a low temperature. Can be removed.

According to the invention of claim 7, in the electric device according to any one of claims 1 to 3, the fluid treatment means is a separation membrane, so that air or decomposed gas in the insulating cooling medium is eliminated. It can be separated and removed.

According to the eighth aspect of the present invention, the impurities in the insulating cooling medium are compressed together with the SF ₆ gas and the vapor of the insulating cooling medium by the compression transporter and collected in the fluid storage tank, whereby Impurities can be removed.

According to the invention of claim 9, the first insulating layer is formed on the surface of the conductor with the first polymer film or polymer fiber having high heat resistance, and the first insulating layer is formed on the outer surface of the first insulating layer. By forming the second insulating layer with a second polymer film having a lower heat resistance than the material forming the insulating layer, it is possible to use a heat resistant material corresponding to the operating temperature, so that a rational insulating structure can be obtained. it can.

According to the invention of claim 10, in the electric device according to claim 9, the first polymer film is polyphenyl sulfone (PPS), the polymer fiber is aromatic polyamide, and the second polymer film is Since the molecular film is made of polyethylene naphthalate (PEN) or polyethylene terephthalate (PET), it can be made of a heat-resistant material corresponding to the operating temperature, so that a rational insulating structure can be obtained.

According to the eleventh aspect of the invention, since the SF ₆ gas is filled in the void formed between the conductor and the first insulating layer, the dielectric constant of the void becomes approximately 1, so that the first insulating layer By reducing the permittivity, the permittivity is well balanced.

According to the twelfth aspect of the present invention, the conductor is insulated with the polymer fiber and the internal pressure of the insulating gas is set to 1 atm or more, whereby the gas density is increased and the withstand voltage can be improved.

According to the thirteenth aspect of the present invention, electric equipment is insulated with a polymer film which is easily deteriorated in a moisture atmosphere, and a dehydrating adsorbent is provided in a flow path of an insulating cooling medium circulating in a cooler. By disposing the fluid treatment tank, it is possible to suppress the heat deterioration of the polymer material that is easily heat deteriorated in the atmosphere in the presence of water.

According to the fourteenth aspect of the present invention, a fluid treatment tank having an adsorbent using an octadecylsilane-based material in series with a cooler in a flow path of an insulating cooling medium is attached and detached with a pair of flanges arranged at both ends. By providing as much as possible, impurities in the insulating cooling medium adsorbed by the adsorbent can be recovered and analyzed.

According to the fifteenth aspect of the invention, in the electric device according to any one of the first to fourteenth aspects, a predetermined insulating performance can be maintained by using an SF ₆ gas as the insulating cooling medium. it can.

According to the sixteenth aspect of the present invention, in the electric device according to any one of the first to fourteenth aspects, the insulating cooling medium is SF ₆ gas and an inert insulating liquid, so that a predetermined insulating performance is obtained. And the cooling performance can be maintained.

According to the seventeenth aspect of the present invention, a liquid insulating medium containing a polar compound such as a decomposition product or a degradation product of a substance is contained in the first container, and the insulating medium is used as an adsorbent for adsorbing the polar compound. Since the polar organic solvent fed by the first pump and stored in the second container is fed by the second pump to the adsorbent to extract the polar compound adsorbed on the adsorbent, the adsorption The polar compound adsorbed on the agent can be analyzed to determine whether the insulating medium is abnormal.

According to the eighteenth aspect of the present invention, a liquid insulating medium containing a polar compound such as a decomposition product or a degradation product of a substance is contained in the first container, and the insulating medium is attached to the adsorbent for adsorbing the polar compound. A polar organic liquid containing a polar compound, which is fed by the first pump and stored in the second container is fed by the second pump to the adsorbent to extract the polar compound adsorbed on the adsorbent. Since the polar compound is detected by the ultraviolet detector provided in the flow path of No. 3, the polar compound extracted in the polar organic solvent can be detected by the ultraviolet detector.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an invention of a first embodiment.

FIG. 2 is a configuration diagram showing an invention of a second embodiment.

FIG. 3 is a configuration diagram showing an invention of Example 3;

FIG. 4 is a configuration diagram showing an invention of Embodiment 4;

FIG. 5 is a configuration diagram showing an invention of Example 5;

6 is a cross-sectional view of the coil shown in FIG.

7 is a cross-sectional view of the lead wire shown in FIG.

FIG. 8 is a sectional view of a coil showing a main part of the invention of Example 6;

FIG. 9 is a sectional view of a coil showing a main part of the invention of Example 6;

FIG. 10 is a sectional view of a coil showing a main part of the invention of Example 7;

FIG. 11 is a breakdown voltage characteristic diagram of an aromatic polyamide fiber.

FIG. 12 is a configuration diagram showing the invention of Example 8;

FIG. 13 is a configuration diagram showing the invention of Example 9;

FIG. 14 is a configuration diagram showing the invention of Example 10;

FIG. 15 is a configuration diagram showing the invention of Example 11;

FIG. 16 is a flowchart of the twelfth embodiment.

FIG. 17 is a configuration diagram of a conventional electric device.

18 is a cross-sectional view of the coil shown in FIG.

19 is a cross-sectional view of the coil shown in FIG.

20 is a cross-sectional view of the coil shown in FIG.

[Explanation of symbols]

1,64,72 container, 2 SF ₆ gas, 3 insulating cooling medium, 6,66,74 pump, 8 cooler, 16,1
7, 26, 30 valves, 21, 58, 59, 67 fluid treatment tanks, 36 gas cylinders, 39 compression transporters, 41
Fluid storage tank, 44 electric device, 44b coil, 45
Conductor, 46, 51, 54 first insulating layer, 47, 52,
55 second insulating layer, 57 polymer fiber, 60, 61
Flange, 65 insulating medium, 77 UV detector.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Hara, 651 Tenwa, Ako City, Ako Plant, Mitsubishi Electric Corporation (72) Inventor, Tsuyoshi Amimoto, 651, Tenwa, Ako City, Mitsubishi Electric Corporation, Ako Plant (72) Inventor Kazuya Higahata, 651 Tenwa, Ako City, Mitsubishi Electric Corporation Ako Plant

Claims (18)

[Claims] 1. A cooler is connected to a container containing an electric device and containing an insulating cooling medium, and the insulating cooling medium is circulated from one end to the other end of the cooler by a pump to cool the insulating cooling medium. In the electric device, one end of a fluid treatment tank having a fluid treatment means for purifying the insulating cooling medium is connected to the other end of the cooler via a first valve, and the other end of the fluid treatment tank is connected to a second end. Connect to the container via a valve,
An electric device characterized in that the other end of the cooler and the container are connected by a third valve. 2. A cooler is connected to a container containing an electric device and containing an insulating cooling medium, and the insulating cooling medium is circulated from one end to the other end of the cooler by a pump to cool the insulating cooling medium. In the electric device, one end of a fluid treatment tank having a fluid treatment means for purifying the insulating cooling medium is connected to an output side of the pump via a first valve, and the other end of the fluid treatment tank is connected to a second valve. An electric device, characterized in that the third valve is connected between the output side of the pump and the cooler via the above. 3. The insulating cooling medium is connected to a container containing an electric device and containing an insulating cooling medium, and the insulating cooling medium is circulated from one end to the other end of the cooler by a first pump. In an electric device for cooling a fluid treatment tank, one end of a fluid treatment tank having a fluid treatment means for purifying the insulating cooling medium is connected to the container via a second pump and a first valve, and An electrical device, characterized in that the end is connected to the container via a second valve. 4. The electric device according to claim 1, wherein the fluid treatment means is an adsorbent that adsorbs impurities in the insulating cooling medium. 5. The electric device according to claim 4, wherein the adsorbent is an octadecylsilane-based material. 6. The electric device according to claim 1, wherein the fluid treatment means is a cold trap that condenses and removes impurities in the insulating cooling medium at a low temperature. apparatus. 7. The electric device according to claim 1, wherein the fluid treatment means is a separation membrane that removes air and decomposed gas in the insulating cooling medium. 8. An electric device in which an electric device is housed in a container and an insulating cooling medium is sealed therein, and an SF having a predetermined pressure is provided in a position of the container where the liquid insulating cooling medium exists.
A gas cylinder filled with ₆ gas was connected via a first valve, a compression transporter was connected to the space of the container via a second valve, and the SF ₆ gas was bubbled into the insulating cooling medium. However, the electric device is characterized in that the fluid existing in the space of the container is compressed by the compression transporter and stored in the fluid storage tank. 9. A first polymer film or polymer having a high heat resistance on the surface of the conductor in an electric device containing an electric device having a coil in which a conductor is wound in a container and enclosing an insulating cooling medium. The first insulating layer is formed of fibers, and the second insulating layer is formed on the outer layer of the first insulating layer by a second polymer film having a lower heat resistance than the material of which the first insulating layer is made. An electric device characterized by the above. 10. The electric device according to claim 9, wherein
The first polymer film is polyphenyl sulfone (PP
S), the polymer fiber is an aromatic polyamide, and the second polymer film is polyethylene naphthalate (PE).
N) or polyethylene terephthalate (PET). 11. An electric device comprising an electric device having a coil in which a conductor is wound in a container and enclosing an insulating cooling medium, wherein the surface of the conductor is formed of a first polymer film having a low dielectric constant. An electric device comprising: forming an insulating layer; and forming a second insulating layer on the outer layer of the first insulating layer with a second polymer film having a higher dielectric constant than the first polymer film. 12. In an electric device in which an electric device having a coil in which a conductor is wound is housed in a container and an insulating cooling medium is enclosed, the conductor is insulated with a polymer fiber, and the inside of the container is
An electric device characterized in that the pressure is equal to or higher than atmospheric pressure. 13. An electric device for cooling an insulating cooling medium by connecting a cooler to a container containing an electric device and enclosing an insulating cooling medium, and circulating the insulating cooling medium to the cooler by a pump. Insulating an electric device with a polymer film that easily deteriorates in a moisture atmosphere, and arranging a fluid treatment tank provided with an adsorbent having a dehydrating property in a flow path of the insulating cooling medium circulating in the cooler. Electrical device that does. 14. An electric device for cooling an insulating cooling medium by connecting a cooler to a container containing an electric device and enclosing an insulating cooling medium, and circulating the insulating cooling medium to the cooler with a pump. An electric device characterized in that a fluid treatment tank provided with an adsorbent using an octadecylsilane-based material is provided in a flow path of an insulating cooling medium in series with the cooler so as to be detachable by a pair of flanges arranged at both ends. . 15. The electric device according to claim 1, wherein the insulating cooling medium is SF ₆ gas. 16. The electric device according to claim 1, wherein the insulating cooling medium is SF ₆ gas and an inert insulating liquid. 17. A liquid insulating medium containing a polar compound such as a decomposition product or a degradation product of a substance is housed in a first container, and the insulating medium is adsorbed on the polar compound by a first pump. Insulation characterized in that the polar organic solvent fed and stored in the second container is fed to the adsorbent by a second pump to extract the polar compound adsorbed on the adsorbent. Anomaly analyzer for media. 18. A liquid insulating medium containing a polar compound such as a decomposition product or a degradation product of a substance is housed in a first container, and the insulating medium is adsorbed on the polar compound by a first pump. The polar organic liquid that has been fed and stored in the second container is fed to the adsorbent by the second pump to extract the polar compound adsorbed on the adsorbent, and the polar organic liquid containing the polar compound. An abnormality analysis device for an insulating medium, characterized in that the polar compound is detected by an ultraviolet ray detector provided in the flow path.