JPH0935957A - Electrical equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To significantly reduce the amount of perfluorocarbon liquid used. [Constitution] A container 1 is a container 2 for housing a transformer body 7 and a perfluorocarbon liquid 8, a switching container 4 for housing a load tap changer 9, and a connecting portion 3 for connecting these 4, 7 to each other. Since the transformer container 2 does not contain the tap changer 9 under load, the container 2 can be downsized, and both sides 2a of the outer periphery of the transformer container 2 have the shape of each transformer body 7. Along the shape of connecting arcs along it, the space between the transformer body 7 and the inner peripheral wall of the container 2 can be made smaller, which leads to size reduction. Therefore, since the transformer container 2 itself can be downsized, the amount of the perfluorocarbon liquid 8 used can be reliably reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric device having a load tap changer, and more particularly to a structure of the electric device suitable for use as a large capacity type using a perfluorocarbon liquid as an incombustible liquid. It is about improvement.

[0002]

2. Description of the Related Art Conventional electric appliances having a tap changer during load are classified into a gas insulation type and a liquid immersion type. Of these, as the gas insulation type,
There is a container body (tank) containing a load tap changer and a transformer body, and an insulating gas is filled in the container body. For example, there is one disclosed in JP-A-63-2308.

On the other hand, as the liquid immersion type, perfluorocarbon as a nonflammable liquid is enclosed in the container body,
By immersing both the load tap changer and the transformer main body in the liquid, the two devices are insulated from each other and cooled. For example, Japanese Patent Laid-Open No. 3-12
There is one described in Japanese Patent No. 0706. The liquid immersion type is superior to the gas insulation type in cooling property, and thus is generally used for the large capacity type.

[0004]

By the way, in the conventional liquid immersion type, as described above, both the tap changer under load and the transformer main body are liquid-immersed by the perfluorocarbon liquid, so that both devices can be immersed. However, since both of these devices are built in the container body, there is a problem in that the container body is increased in size. Moreover, since the amount of the perfluorocarbon liquid used increases with the increase in the size of the container body, there is a problem that the cost of the perfluorocarbon liquid is particularly high.

Therefore, in an attempt to eliminate the increase in the size of the container body, a rectangular container body may be used, for example, in Japanese Patent Laid-Open No. 54-54.
As disclosed in Japanese Patent No. 161025, the shape of the container body is formed in an arc shape along the shape of the transformer body, thereby avoiding the container from becoming large and reducing the amount of the perfluorocarbon liquid used to some extent. It is easy to think of. However, even in such a case, when it is required to make the electric device larger and have a larger capacity than it is now, the container body and the tap tap changer at the time of loading are included together, so that the container is Since the size of the main body must be increased, the amount of the perfluorocarbon liquid used also increases, resulting in a huge cost. Moreover, in order to increase the size and capacity of the container, the mechanical strength of the container body must be taken into consideration. Therefore, not only is it impossible to avoid increasing the size of the container body,
Moreover, since both insulation performance and cooling performance must be taken into consideration, a large amount of perfluorocarbon liquid will be used, resulting in a large size and high cost, and problems that cannot be solved both. .

In view of the above-mentioned problems of the prior art, the object of the present invention is to significantly reduce the amount of the perfluorocarbon liquid used even if the size and volume of the liquid are increased, thereby reducing the cost. It is to provide a feasible electric device. Another object of the present invention is to provide an electric device capable of improving the connection work between the transformer main body and the tap switch during load.

[0007]

According to the present invention, in an electric device in which a plurality of transformer main bodies, a tap changer under load, and a perfluorocarbon liquid as a nonflammable liquid are contained in a container, each container is a transformer. It is formed by a transformer container containing the container main body and the perfluorocarbon liquid, a switch container containing a load tap changer, and a connecting portion connecting the switch container and the transformer container to each other. Further, the transformer container is characterized in that both side surfaces of the outer periphery are formed by connecting arcs along the shape of each transformer body.

Further, in the present invention, the connecting portion is internally provided,
The present invention is characterized by having a connection terminal of a tap lead wire under load for connecting the transformer main body and the tap tap changer under load.

[0009]

In the present invention, as described above, the container is a container for transformers containing each transformer body and a perfluorocarbon liquid, a container for switchers containing a tap changer during load, a container for switchers and a container for transformers. Since the container is formed by the connecting portion that connects the containers to each other, the container can be downsized by the amount that the tap changer during load is not housed in the transformer container. Moreover, since both sides of the outer circumference of the transformer container are formed by connecting arcs along the shape of each transformer main body, it is possible to reduce the space between the transformer main body and the inner peripheral wall of the container. From this point as well, the size can be reduced.

Therefore, the transformer container itself can be miniaturized by providing the transformer container with an arc shape and by providing the switching container and the switching container separate from each other, so that the amount of the perfluorocarbon liquid to be enclosed in the container can be reduced. It can be surely reduced.

Further, according to the present invention, as described above, since the connecting portion is internally provided with the connection terminal for the load tap lead wire for connecting the transformer body and the load tap changer, When connecting the container and the switching device container,
Since it is not necessary to draw the tap lead wire inside the transformer container, it is possible to improve the connection workability when connecting the transformer main body and the load tap changer.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. 1 is an overall perspective view showing an embodiment of the present invention, FIG. 2 is a plan view for explaining the same, FIG. 3 is a sectional view taken along the line AA of FIG. 2, FIG. 4 is an enlarged view of a main part of FIG. FIG. 4 is a cross-sectional view of the container body.

In the electrical equipment of the embodiment, the container 1 is roughly divided into a transformer container 2 and a switching device container 4 connected to the transformer container 2 through a connecting portion 3, as shown in FIG. It is configured to have.

The transformer container 2 accommodates three transformer main bodies 7 each consisting of an iron core 5 and a winding wire 6 wound around an intermediate position of the iron core 5, and also contains perfluorocarbon as a nonflammable liquid. The liquid 8 is sealed in, and both side surfaces 2a of the outer circumference have a shape in which arcs are connected along the shape of each transformer body 7. That is, as shown in FIGS. 1, 2 and 5, the outer periphery of the transformer main body 2 has both side surface portions 2a corresponding to the respective transformer main bodies 7 along the shape of the winding wire 6 of the transformer main body 7. Both sides 2 of each arc shape
a is connected by the flat plate portion 2b. Switching dexterity container 4 accommodates the load tap changer 9, SF ₆
A nonflammable insulating gas 10 made of gas is enclosed, and has a cylindrical shape along the shape of the switch 8.

The first connecting pipe 3a is formed in the lower portion of the transformer container 2, while the second connecting pipe 3b is formed in the lower portion of the switching device container 4, and the second connecting pipe 3b and the first connecting pipe are formed. 3a and 3a are connected to each other by a relay plate 3c. Therefore, the connecting portion 3 is constituted by the first connecting pipe 3a, the second connecting pipe 3b, and the relay plate 3c.

Further, since the transformer main body 7 and the load tap changer 9 are housed in the separate containers 2 and 4 as described above, it is necessary to connect the both 7 and 9. Therefore, the connection terminal 9a of the tap lead wire of the tap changer 9 under load is arranged inside the first connection pipe 3a of the connection portion 3. Although not shown in detail in FIG. 2, the tap lead wire connection terminal 9a is arranged in the first connection pipe 3a so as to be partitioned by the filling space 23 from the internal space of the transformer container 2 (FIG. 5). ), When connecting the transformer container 2 and the switching device container 4 by the connecting portion 3, the relay plate 3 of the connecting portion 3
The transformer main body 7 and the load tap changer 9 are connected by being inserted into c. Therefore, the connection terminal 9a of the tap lead wire can be inserted into the relay plate 3c.

Further, in the tap lead wire of the tap changer 9 under load, a middle portion 9b connected to each transformer body 7 is provided with a support for supporting the winding 6, as shown in FIGS. It is held by a table 20, and the supporting table 20 serves both to support the winding 6 and to hold the middle portion 9b of the tap lead wire. The support 20 will be described later.

On the other hand, a high voltage cable head 11 is attached to each of the transformer containers 2 in order to connect each transformer body 7 to a gas insulation device (GIS) (not shown). As shown in FIGS. 2 and 3, the high voltage cable head 11 is connected to a position corresponding to each transformer body 7 on one side surface upper portion of the transformer container 2 through a partition portion 15. This high-voltage cable head 11 is provided with a head portion 12 and a high-voltage busbar 13 inside, and is filled with an incombustible gas 14 made of SF ₆ gas so that a gas insulation device is connected to the tip of the head portion 12. Has become.

Further, a barrier 16 is attached to the inner peripheral wall of the transformer container 2 as shown in FIG. When the barrier 16 is attached to the inner peripheral wall of the transformer container 2, the barrier 16 minimizes the gap between the inner peripheral wall and the winding 6 of the transformer main body 7 and subdivides the enclosed perfluorocarbon liquid 8. I am trying.

Next, the transformer container 2 will be described in more detail. A support base 20 for supporting the winding wire 6 of the transformer body 7 is provided inside the transformer container 2. As shown in FIGS. 3 and 4, the support base 20 has an elongated shape so that the iron core 5 can be inserted and the windings 6 can be supported thereon, and the support base 20 is provided at the bottom of the transformer container 2 as shown in FIG. As shown in, they are arranged to face each other along the longitudinal direction. Then, at a position closer to the outside of the support base 20, that is, at a portion located closer to the high-voltage cable head 11 of the support base 20 in the transformer container 2, a tap lead wire stopper 21 is provided to connect the tap lead. Midway part 20 for wire
b is supported, and the intermediate portion 20b is located below the winding 6 and laterally of the iron core 5.

In each transformer body 7, the iron core 5 is inserted through the winding 6, and the upper and lower parts of the iron core 5 are exposed. The upper and lower parts of the iron core 5 swell in the horizontal direction. It has a bulging portion 5a formed in a shape. Although the bulging portion 5a is not shown in detail in FIG. 4, the portion exposed from the winding 6 of the iron core 5 should be larger than the portion through which the winding 6 is inserted. It has a quadrangular swelling cross-sectional shape so that the space space in the transformer container 2 can be reduced as much as possible.

Further, in the transformer container 2, as shown in FIG. 3, a solid insulator 22 is provided between the inner peripheral wall near the partition 15 and the upper portion of the iron core 5, and the solid insulator 2 is provided.
2 also makes it possible to reduce the space space in the transformer container 2. Therefore, the space space in the transformer container 2 is configured to be as small as possible within a range in which the insulation performance and cooling performance of the perfluorocarbon 8 are not impaired.

The electrical equipment of the embodiment has the container 1 as described above.
The transformer container 2 containing each transformer main body 7 and the perfluorocarbon liquid 8, the switch container 4 containing the load tap changer 9, and the switch container 4 and the transformer container 7 are connected to each other. Since it is formed by the connecting portion 3, the container 2 can be downsized by the amount that the tap switch 9 during load is not housed in the transformer container 2. Moreover, since both side surfaces 2a of the outer circumference of the transformer container 2 follow the shape of each transformer main body 7 and have a shape in which arcs are connected, a space portion between the transformer main body 7 and the inner peripheral wall of the container 2 is formed. Since it can be made smaller, the size can be made smaller also from this point. Therefore, the transformer container 2 itself can be miniaturized by forming the transformer container 2 into an arc shape and providing the switching container 4 separate from the container 2,
It is possible to surely reduce the amount of the perfluorocarbon liquid 8 enclosed in this.

Further, since the connection terminal 9a of the tap lead wire of the load tap changer is wired to the first connecting pipe 3a of the connecting portion 3 between the transformer case 2 and the changeover container 4, the transformer case is formed. When connecting the switch 2 and the switching device container 4, it is not necessary to draw the tap lead wire inside the transformer container 2 as in the prior art, and the tap lead wire connection terminal 9 is provided.
Since it can be connected simply by inserting a into the relay plate 3c,
The work can be simplified and the connection workability can be improved.

Inside the transformer container 2, the upper and lower portions of the iron cores 5 through which the windings 6 are inserted have bulging portions 5a which are bulged in the horizontal direction. The space space between the container body 7 and the inner peripheral wall of the container 2 can be made as small as possible, and the strength of the transformer body 7 can be increased. Moreover, since the solid insulator 22 is provided between the inner peripheral wall of the container 2 near the partition plate 15 and the upper portion of the iron core 5, the space space can be reduced also from this point, and the container for the transformer can be formed. The strength of itself 2 can also be reinforced. Further, since the barrier 16 made of an insulating material is attached to the inner peripheral wall of the transformer container 2, the barrier 16 can also reduce the space space. Furthermore, since the support base 20 that supports the winding wire 6 is arranged in a long shape along the longitudinal direction of the container 2, the support strength of the transformer body 7 can be increased, and the area of the support base 20 can be increased. Along with the expansion, the intermediate portion 9b of the tap lead wire for the load tap changer 9 is held by the stopper 21 on the support base 20, so that the interior of the container 2 is filled by that amount. Also, the space space can be reduced.

As a result, each of the bulging portion 5a of the iron core 5, the solid insulator 22, the barrier 16, the elongated shape of the support 20, and the middle portion 9b of the tap lead wire functions as a filling body in the container 2. As a result, the space space in the container 2 can be reduced so much, so that the amount of the perfluorocarbon liquid 8 used can be further reduced. Moreover, not only can the strength of the transformer container 2 itself be increased by the support base 20 and the solid insulator 22, but also the bulging portion 5
The strength of the transformer main body 7 can be increased by using the solid insulator 22. That is, by providing the filler inside the miniaturized transformer container 2, it is possible to achieve both an increase in strength and a reduction in the amount of the perfluorocarbon liquid.

Further, when the barrier 16 is provided, as described above, not only can the gap between the inner peripheral wall of the container 2 and the winding wire 6 of the transformer main body 7 be minimized, but also the gap can be minimized, thereby making the container 2 Since the perfluorocarbon liquid 8 therein can be subdivided, the pressure resistance of the perfluorocarbon liquid 8 can be improved.

In the illustrated embodiment, the bulging portions 5a are formed on the upper and lower portions of the iron core 5, and the solid insulator 22 or the like is provided between the inner peripheral wall of the container 2 and the iron core 5. ， It has been confirmed that there is no risk of loud noise.

[0029]

As described above, claims 1 to 5 of the present invention.
According to 6, a transformer container containing each transformer body and a perfluorocarbon liquid, a switch container containing a load tap changer, and a connecting portion connecting the switch container and the transformer container to each other are provided. Since the container is formed, and the transformer container has a shape in which both side surfaces of the outer periphery are connected with arcs along the shape of each transformer main body,
The transformer container can be miniaturized as much as the load tap changer is not housed, and the space between the transformer main body and the inner peripheral wall of the container can be made smaller, so that the perfluorocarbon can be miniaturized. The amount of liquid used can be reliably reduced. Therefore, even if the size and volume of the liquid are increased, the amount of the perfluorocarbon liquid used can be greatly reduced, resulting in a significant cost reduction. There is an effect to obtain.

According to the second aspect of the invention, the connecting portion has therein the connection terminal for the load tap lead wire for connecting the transformer main body and the load tap changer.
In addition to the first aspect, there is an effect that the connection workability when connecting the transformer body and the load tap changer can be improved.

According to the third to sixth aspects of the invention, since the filling body capable of filling the space between the transformer container and the inner peripheral wall of the transformer container is provided, the inside of the transformer container is constituted. Since the space space can be further reduced, the amount of perfluorocarbon liquid used can be further reduced, and the strength of the transformer container itself and the strength of the transformer body can be increased. In particular, claim 6
According to this, since the barrier made of an insulating material is attached to the inner peripheral wall of the transformer container, there is also an effect that the pressure resistance of the perfluorocarbon liquid can be improved.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an entire container showing an embodiment of the present invention.

FIG. 2 is an explanatory plan view showing an embodiment of the present invention.

3 is an explanatory sectional view taken along the line AA of FIG.

FIG. 4 is an enlarged view for explaining a part B in FIG.

FIG. 5 is an explanatory cross-sectional view showing a transformer container.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Container, 2 ... Transformer container, 3 ... Connection part, 4 ... Switching container, 5 ... Iron core, 5a ... Iron core bulging part, 6 ... Winding, 7
... transformer main body, 8 ... perfluorocarbon liquid as a non-flammable liquid, 9 ... load tap changer, 9a ... tap lead wire connection terminal of load tap changer, 9b ... middle part of tap lead wire, 16 ... barrier, 20 ... support base.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Oshio 1-1-1 Kokubuncho, Hitachi City, Hitachi, Ibaraki Hitachi Kokubun Plant, Ltd.

Claims (6)

[Claims] 1. An electric device in which a plurality of transformer main bodies, a tap changer under load, and a perfluorocarbon liquid as a nonflammable liquid are contained in a container, the container is provided with each transformer main body and the perfluorocarbon liquid. Transformer container, and a switching device container that accommodates a tap switching device under load,
The switching container and the transformer container are formed by connecting portions that connect each other, and the transformer container has a shape in which both side surfaces of the outer periphery are formed by connecting arcs along the shape of each transformer body. Characteristic electrical equipment. 2. An electric device in which a plurality of transformer main bodies, a tap changer at load, and a perfluorocarbon liquid as a nonflammable liquid are contained in a container, and the container is provided with each transformer main body and the perfluorocarbon liquid. Transformer container, and a switching device container that accommodates a tap switching device under load,
The switching container and the transformer container are formed by connecting portions that connect to each other, and the transformer container has a shape in which both side surfaces of the outer periphery are connected with arcs along the shape of each transformer body, and the connecting portion. Is an electric device having a connection terminal for a load tap lead wire that connects a transformer body and a load tap changer inside. 3. An electric device in which a plurality of transformer main bodies, a tap changer under load, and a perfluorocarbon liquid as a nonflammable liquid are contained in a container, and the container is provided with each transformer main body and the perfluorocarbon liquid. Transformer container, and a switching device container that accommodates a tap switching device under load,
The switching container and the transformer container are formed by connecting portions that connect to each other, and the transformer container has a shape in which both side surfaces of the outer periphery are connected with arcs along the shape of each transformer body, and the connecting portion. Has a connection terminal for the load tap lead wire that connects the transformer main body and the load tap changer inside, and the space between both is provided between the inner peripheral wall of the transformer container and the transformer main body. An electric device provided with a filling body that can be filled. 4. An electric device in which a plurality of transformer bodies, a tap changer under load, and a perfluorocarbon liquid as a nonflammable liquid are contained in a container, the container is provided with each transformer body and the perfluorocarbon liquid. Transformer container, and a switching device container that accommodates a tap switching device under load,
The switching container and the transformer container are formed by connecting portions that connect to each other, and the transformer container has a shape in which both side surfaces of the outer periphery are connected with arcs along the shape of each transformer body, and the connecting portion. Has a connection terminal for the load tap lead wire that connects the transformer main body and the load tap changer inside, and the space between both is provided between the inner peripheral wall of the transformer container and the transformer main body. An electric device, wherein a filling body that can be filled is provided, and the filling body has bulging portions formed by bulging in a horizontal direction in an upper portion and a lower portion through which a winding is inserted in an iron core of each transformer body. 5. An electric device containing a plurality of transformer main bodies, a tap changer during load, and a perfluorocarbon liquid as a nonflammable liquid in a container, wherein the container contains each transformer main body and the perfluorocarbon liquid. Transformer container, and a switching device container that accommodates a tap switching device under load,
The switching container and the transformer container are formed by connecting portions that connect to each other, and the transformer container has a shape in which both side surfaces of the outer periphery are connected with arcs along the shape of each transformer body, and the connecting portion. Has a connection terminal for the load tap lead wire that connects the transformer main body and the load tap changer inside, and the space between both is provided between the inner peripheral wall of the transformer container and the transformer main body. A filling body that can be filled is provided, and the filling body includes a bulging portion formed by bulging in the horizontal direction in the upper and lower portions of the iron core of each transformer body through which the winding is inserted, and the winding of each transformer body. An electric device comprising: a support base that supports and holds an intermediate portion of a tap lead wire under load, and has a long shape along the longitudinal direction of a transformer container. 6. An electric device in which a plurality of transformer main bodies, a tap changer under load, and a perfluorocarbon liquid as a nonflammable liquid are contained in a container, and the container is provided with each transformer main body and perfluorocarbon liquid. Transformer container, and a switching device container that accommodates a tap switching device under load,
The switching container and the transformer container are formed by connecting portions that connect to each other, and the transformer container has a shape in which both side surfaces of the outer periphery are connected with arcs along the shape of each transformer body, and the connecting portion. Has a connection terminal for the load tap lead wire that connects the transformer main body and the load tap changer inside, and the space between both is provided between the inner peripheral wall of the transformer container and the transformer main body. A filling body that can be filled is provided, and the filling body includes a bulging portion formed by bulging in the horizontal direction in the upper and lower portions of the iron core of each transformer body through which the winding is inserted, and the winding of each transformer body. A support base that supports and holds the tap lead wire under load and has a long shape along the longitudinal direction of the transformer container, and a barrier made of an insulating material attached to the inner peripheral wall of the transformer container. A battery characterized by having Equipment.