JP2001085254A - Transformer for combined gas-insulated lightning arrester and grounding instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an outer diameter of a transformer for combined gas- insulated lightning arrester and grounding tstrument as well as overall size of a GIS apparatus to which it is attached, by reducing the diameter of a metallic container. SOLUTION: A VT content element 4 is vertically arranged on the bottom of a metallic container 9, and a supporting plate 13 is formed on its upper part and LA content elements 7a, 7b and 7c are vertically arranged on the supporting plate 13. The high-voltage winding 2 of a VT content element 4 is connected with the LA content element 7b by means of a U-shaped entending connection conductor 10. Thus, the VT content element and LA content element of the gas insulated LA-VT are vertically arranged on the upper and lower sides, so that the diameter of the metallic container housing them can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated surge arrester combined grounding-type instrument transformer which is directly connected to a gas-insulated switchgear (GIS), and more particularly to a method of arranging the contents of the transformer.

[0002]

2. Description of the Related Art Conventionally, a transformer for a grounding instrument (hereinafter referred to as V
T) and a lightning arrester (hereinafter referred to as LA) that protects the insulation of equipment from overvoltage in a metal container together with insulating gas in the same metal container. (Hereinafter referred to as gas-insulated LA-VT) is known. This gas-insulated LA-VT is used directly connected to a gas-insulated switchgear.

FIGS. 8 and 9 show examples of the configuration of such a gas-insulated LA-VT. 8A and 8B, the gas-insulated LA-VT includes one phase of a VT content element 4 in which a high-voltage winding 2 and a low-voltage winding 3 are coaxially wound around an iron core 1, and elements 5a and 5b. An LA content element 7a, 7b, 7c consisting of three phases 5b, 5c and electrodes 6a, 6b, 6c is arranged. These are placed in the same metal container 9 in an insulating gas 8.
And is vertically arranged on the bottom surface of the metal container 9.

The high voltage winding 2 of the VT contents element 4 and the LA
The contents element 7b is connected by the connection conductor 10. Further, the metal container 9 is sealed by an insulating spacer 11, and the high voltage terminals 12a, 12
b, 12c are drawn out.

In FIGS. 9 (a) and 9 (b), gas-insulated LA-VT includes high-voltage windings 2a, 2b, 2c and low-voltage windings 3a, 3c on iron cores 1a, 1b, 1c, respectively.
VT contents elements 4a, 4 obtained by winding b, 3c coaxially
b, 4c, the elements 5a, 5b, 5c and the electrodes 6
LA content elements 7a, 7b, 7c consisting of a, 6b, 6c
Three phases are arranged. These are stored together with the insulating gas 8 in the same metal container 9 and are arranged vertically on the bottom surface of the metal container 9. VT content element 4
The high-voltage windings 2a, 2b, 2c of a, 4b, 4c are connected to the LA content elements 7a, 7b, 7c by connecting conductors 10a, 10b, 10c, respectively. 8, the metal container 9 is sealed with an insulating spacer 11, and the high-voltage terminals 12a, 12b, and 12c are drawn out of the metal container 9.

[0006]

By the way, in the conventional gas-insulated LA-VT as described above, the VT contents elements 4 or 4a, 4b, 4c and the LA contents elements 7a, 7b, 7c are formed on the bottom surface of the metal container 9. Since they are arranged on the upper side, that is, on the same plane, there is a problem that the diameter D8 or D9 of the metal container 9 for housing them is increased. Therefore, since the gas-insulated LA-VT itself becomes large, a large space is required for storage and transportation, and the gas-insulated LA-VT is required.
There is a problem that handling of the VT is troublesome. Furthermore,
In a GIS device to which the gas insulated LA-VT is attached, it is necessary to avoid mutual interference with other devices, so that it is necessary to ensure a large distance between the devices. Therefore, there has been a problem that the entire GIS device becomes large and uneconomical.

[0007] The present invention has been proposed to solve the above-mentioned problems of the prior art.
By vertically arranging the VT contents element and the LA contents element of the gas-insulated LA-VT vertically, the diameter of the metal container for accommodating the VT contents element and the LA contents element is reduced.
An object of the present invention is to reduce the outer diameter of the A-VT and the entire GIS equipment to which the gas-insulated LA-VT is attached.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a transformer for a grounded-type instrument comprising an iron core and high-voltage and low-voltage windings wound on the iron core. , VT contents element) and the lightning arrester contents element (hereinafter referred to as LA contents element) are housed in the same metal container together with the insulating gas, and one end of the high-voltage winding is connected to the lightning arrester contents element. The gas-insulated surge arrester combined grounding type instrument transformer (hereinafter referred to as gas-insulated LA-VT) has the following features.

According to a first aspect of the present invention, the contents of the lightning arrester and the contents of the grounding type transformer are arranged vertically in the metal container in the vertical direction of the metal container. It is characterized by being arranged.

According to the first aspect of the present invention,
Since the VT contents element and the LA contents element are arranged above and below the metal container in the height direction, the diameter of the metal container can be reduced as compared with arranging them on the same plane. Therefore, the outer diameter of the gas-insulated LA-VT can be reduced,
The space required for storage and transportation can be reduced, and handling of the gas-insulated LA-VT is facilitated. Further, in the GIS device to which the gas-insulated LA-VT is attached, the outer diameter of the gas-insulated LA-VT is reduced, thereby minimizing the distance required to avoid mutual interference with other devices. be able to. Therefore, the entire GIS device can be reduced, and the GIS device can be economical.

According to a second aspect of the present invention, in the first aspect, the VT contents are vertically arranged. According to the second aspect of the present invention, since the vertically arranged LA contents element and the vertically arranged VT contents element are arranged vertically above and below the metal container, the diameter of the metal container is greatly reduced. be able to.

According to a third aspect of the present invention, in the first aspect of the present invention, the VT content elements are horizontally arranged. According to the third aspect of the invention, by arranging the VT content elements horizontally, it is possible to reduce the space in the metal container in the height direction of the core of the VT content elements. Therefore, it is possible to reduce not only the diameter of the metal container but also the size in the height direction.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the VT content elements are arranged obliquely. According to the fourth aspect of the present invention, the height of the metal container can be reduced by arranging the VT content elements in an inclined manner. Also, VT
Since the iron core of the content element is inclined, it is possible to have a structure in which foreign matter or dust is unlikely to adhere to the iron core.
It becomes possible to make it a T content element.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the VT content elements are provided for three phases, at least one of which is arranged on the same plane as the LA content elements, and At least one phase is arranged below them. According to the fifth aspect of the present invention, one or two phases of the three-phase VT content element are set to L
The distance between the VT content elements is to be arranged above with the A content elements and to place the remaining two or one phase below.
It can be smaller than when all are arranged on the same plane. Therefore, the diameter of the metal container can be reduced.

A sixth aspect of the present invention is characterized in that, in the fifth aspect of the present invention, the VT content elements arranged below the VT are horizontally arranged. Claim 6
According to the invention described above, by arranging the VT content elements horizontally, it is possible to reduce the space in the metal container in the height direction of the iron core of the VT content elements. Therefore, it is possible to reduce not only the diameter of the metal container but also the size in the height direction.

A seventh aspect of the present invention is characterized in that, in the fifth aspect of the present invention, the VT contents element disposed below is inclined. Claim 7
According to the described invention, the height dimension of the metal container can be reduced by arranging the VT content elements in an inclined manner. Also, since the core of the VT content element is inclined,
It is possible to adopt a structure in which foreign matter, dust, or the like does not easily adhere to the iron core, and it is possible to provide a high-quality VT content element.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas-insulated surge arrester composite grounding type instrument transformer (gas-insulated LA-VT) according to the present invention will be described below with reference to the drawings. Note that the same members as those of the conventional gas-insulated LA-VT shown in FIGS. 8 and 9 are denoted by the same reference numerals.

[1. First Embodiment] [1-1. Configuration] FIGS. 1A and 1B are schematic diagrams showing the configuration of a gas-insulated LA-VT according to the present embodiment, wherein FIG. 1A is a cross-sectional view, and FIG. In the present embodiment, V is formed by coaxially winding high-voltage winding 2 and low-voltage winding 3 around iron core 1.
LA content elements 7a, 7b, 7 comprising one phase of T content element 4, elements 5a, 5b, 5c and electrodes 6a, 6b, 6c
c three phases are arranged in the metal container 9.

In this case, as shown in FIG. 1B, the VT contents elements 4 are vertically arranged on the bottom surface of the metal container 9. That is, as shown in FIG. 1B, the iron core 1 of the VT content element 4 is arranged perpendicular to the horizontal plane. A support plate 13 parallel to a horizontal plane is formed above the VT contents element 4.
The A content elements 7a, 7b, 7c are installed vertically.

The high-voltage winding 2 of the VT content element 4 is connected to the LA content element 7b by a connection conductor 10 extending in a U-shape. 8 and 9, the metal container 9 is hermetically sealed by the insulating spacer 11, and the high voltage terminal 12 is removed from the metal container 9.
a, 12b and 12c are drawn out.

[1-2. Operation and Effect] According to the gas insulating LA-VT of the present embodiment having the above-described configuration, the following operation and effect can be obtained. That is, since the VT content element 4 and the LA content elements 7a, 7b, 7c are vertically arranged in the metal container 9, the diameter D1 of the metal container 9 is smaller than the diameter D8 shown in FIG. Greatly reduced. Therefore, the outer diameter of the entire gas-insulated LA-VT can be reduced, the space required for storage and transportation can be reduced, and the gas-insulated LA-VT can be reduced.
Handling of VT becomes easy.

Further, in the GIS device to which the gas-insulated LA-VT is attached, the outer diameter of the gas-insulated LA-VT is reduced, so that the distance required to avoid mutual interference with other devices is minimized. Can be limited. Therefore, the entire GIS device can be reduced, and the GIS device can be economical.

[2. Second Embodiment] FIGS. 2A and 2B are schematic diagrams showing a configuration of a gas-insulated LA-VT according to the present embodiment, wherein FIG. 2A is a cross-sectional view and FIG. In the present embodiment, similar to the above-described first embodiment,
One VT content element 4 phase and LA content elements 7a, 7b, 7
c three phases are arranged in the metal container 9. The difference of the present embodiment from the first embodiment is that the VT contents elements 4 are horizontally arranged on the bottom surface of the metal container 9 by support means (not shown). That is, the iron core 1 of the VT content element 4 is arranged parallel to the horizontal plane. In addition, regarding the LA content elements 7a, 7b, 7c,
As in the first embodiment, by being set on the support plate 13, the VT contents element 4 is vertically arranged above the VT contents element 4.

According to the gas-insulated LA-VT of the present embodiment having the above-described configuration, the diameter D2 is significantly reduced as compared with the diameter D8 of the conventional metal container 9. Therefore, the same operation and effect as those of the first embodiment can be obtained. Furthermore, in this embodiment, since the VT contents elements 4 are horizontally arranged, the space in the metal container 9 in the height direction of the iron core 1 is reduced. Therefore, the metal container 9
Can be reduced in height.

[3. Third Embodiment] FIGS. 3A and 3B are schematic views showing the configuration of a gas-insulated LA-VT according to the present embodiment, wherein FIG. 3A is a cross-sectional view, and FIG. In the present embodiment, as in the first and second embodiments described above, one phase of the VT content element 4 and the LA content elements 7a, 7
The three phases b and 7c are arranged in the metal container 9.
The difference of the present embodiment from the first and second embodiments is that the VT contents element 4 is inclined on the bottom surface of the metal container 9 by support means (not shown).
That is, as shown in FIG. 3B, the iron core 1 of the VT content element 4 is arranged to be inclined with respect to the horizontal plane. In addition,
The LA content elements 7a, 7b, and 7c are disposed on the support plate 13 in the same manner as in the first and second embodiments, and are vertically arranged above the VT content element 4.

According to the gas-insulated LA-VT of the present embodiment having the above configuration, the diameter D3 of the metal container 9
Is greatly reduced as compared with the diameter D8 of the conventional metal container 9. Therefore, the same operation and effect as those of the first embodiment can be obtained. Further, in the present embodiment, since the VT contents elements 4 are arranged obliquely, the height dimension of the metal container 9 can be reduced. Further, since the iron core 1 is inclined, it is possible to have a structure in which foreign matter, dust, or the like is unlikely to adhere to the iron core 1, and it is possible to provide a high-quality VT content element.

[4. Fourth Embodiment] FIGS. 4A and 4B are schematic diagrams showing the configuration of a gas-insulated LA-VT according to the present embodiment, wherein FIG. 4A is a cross-sectional view and FIG. In the present embodiment, high-voltage windings 2a, 2b, 2c and low-voltage windings 3a, 3b, 3c are attached to iron cores 1a, 1b, 1c, respectively.
Of VT contents elements 4a, 4b, 4c formed by coaxially winding the elements, elements 5a, 5b, 5c and electrodes 6a, 6b, 6
The three-phase LA content elements 7a, 7b, and 7c are arranged. In this case, three-phase VT contents elements 4a, 4b, and 4c are vertically arranged on the bottom surface of the metal container 9, for example, the support plate 13 is provided on the upper part of the VT contents element 4b.
Are formed, and the LA content elements 7a, 7
b, 7c are installed vertically. The high-voltage windings 2a, 2b, 2c of the VT content elements 4a, 4b, 4c are connected to the LA content elements 7a, 7b, 7c by connection conductors 10a, 10b, 10c, respectively.

According to the gas-insulated LA-VT of the present embodiment having the above configuration, the VT contents elements 4a, 4
Since the b and 4c and the LA content elements 7a, 7b and 7c are vertically arranged in the metal container 9 vertically, the diameter D4 of the metal container 9 is significantly larger than the diameter D9 shown in FIG. Scaled down. Therefore, the same operation and effect as those of the first embodiment can be obtained.

[5. Fifth Embodiment] FIGS. 5A and 5B are schematic diagrams showing the configuration of a gas-insulated LA-VT according to the present embodiment, wherein FIG. 5A is a cross-sectional view and FIG. In the present embodiment, similar to the above-described fourth embodiment,
VT contents elements 4a, 4b, and 4c and three phases of LA contents elements 7a, 7b, and 7c are arranged in the metal container 9. The difference between the fourth embodiment and the fourth embodiment is that the VT contents elements 4a and 4c are LA content elements 7a and 7c.
b and 7c are arranged vertically on the support plate 13. That is, the area of the support plate 13 is such that two phases of VT contents elements 4a and 4c are set on the support plate 13 shown in FIG.
The VT contents element 4 is placed on the bottom of the metal container 9 obliquely below them.
b One phase is vertically arranged.

According to the gas-insulated LA-VT of the present embodiment having the above-described configuration, the VT contents element 4 for three phases is provided.
Since only the central VT content element 4b among the elements a, 4b and 4c is arranged stepwise, the radial dimension between them is made smaller than when all are arranged on the same plane as shown in FIG. be able to. Therefore, the diameter D5 of the metal container 9 can be reduced as compared with the diameter D9 shown in FIG. Therefore, the same operation and effect as those of the fourth embodiment can be obtained.

[6. Sixth Embodiment] FIGS. 6A and 6B are schematic views showing the configuration of a gas-insulated LA-VT according to the present embodiment, wherein FIG. 6A is a cross-sectional view and FIG. In the present embodiment, similarly to the above-described fourth and fifth embodiments, three phases of VT contents elements 4a, 4b, and 4c and LA
The contents elements 7a, 7b, and 7c are arranged in the metal container 9 for three phases. Further, as in the fifth embodiment, V
Two phases of the T content elements 4a and 4c are set on the support plate 13, and only one phase of the VT content element 4b is arranged on the bottom surface of the metal container 9. The difference between the fifth embodiment and the fifth embodiment is that the VT contents element 4b is horizontally arranged on the bottom surface of the metal container 9.

According to the gas-insulated LA-VT of the present embodiment having the above configuration, the diameter D6 of the metal container 9 is
Is significantly reduced as compared with the diameter D9 of the metal container 9 shown in FIG. Therefore, the same functions and effects as those of the fifth embodiment can be obtained. Further, in the present embodiment, VT
Since the content elements 4b are horizontally arranged, the space in the metal container 9 corresponding to the height direction of the iron core 1b is reduced.
Therefore, the height of the metal container 9 can be reduced.

[7. Seventh Embodiment] FIGS. 7A and 7B are schematic diagrams showing the configuration of a gas-insulated LA-VT according to the present embodiment, wherein FIG. 7A is a cross-sectional view and FIG. In the present embodiment, similarly to the above-described fourth to sixth embodiments, three phases of the VT contents element 4 and the LA contents elements 7a, 7
The three phases b and 7c are arranged in the metal container 9.
Further, as in the fifth and sixth embodiments, two VT contents elements 4a and 4c are installed on the support plate 13, and only one VT contents element 4b is disposed on the bottom surface of the metal container 9. Have been. The difference between the fifth embodiment and the sixth embodiment of the present embodiment is that the VT contents element 4b is arranged obliquely on the bottom surface of the metal container 9.

According to the gas-insulated LA-VT of the present embodiment having the above configuration, the diameter D7
Is significantly reduced as compared with the diameter D9 of the metal container 9 shown in FIG. Therefore, the same functions and effects as those of the fifth embodiment can be obtained. Further, in the present embodiment, VT
Since the contents element 4b is arranged obliquely, the size of the metal container 9 in the height direction can be reduced. In addition, iron core 1
Since b is inclined, it is possible to adopt a structure in which foreign matter, dust, or the like does not adhere to the iron core 1b, and it is possible to obtain a high-quality VT content element 4b.

[8. Other Embodiments] The present invention is not limited to the above-described embodiments, and various embodiments as described below are also possible. That is, the specific shape of each member or the mounting position and method can be appropriately changed. For example, three-phase VT contents elements 4a, 4b,
4C is not limited to the position as shown in FIGS. 4 to 7 described above. When the VT contents element 4c is arranged vertically, the VT contents element 4b is set on the support plate 13 and the remaining VT contents elements 4b are placed.
a and 4c may be installed on the bottom surface of the metal container 9. Also, for example, the three-phase VT contents element 4 shown in FIG.
a, 4b and 4c may be arranged in an inclined manner.

[0036]

As described above, according to the present invention,
By arranging the VT contents element and the LA contents element of the gas-insulated LA-VT vertically in the vertical direction, it is possible to reduce the diameter of the metal container that stores them. Therefore, the space for storing and transporting the gas-insulated LA-VT can be reduced, and the handling becomes easy. Furthermore, in the GIS device to which the gas-insulated LA-VT is attached, mutual interference with other devices can be minimized,
The distance between the devices can be reduced. Therefore, G
The entire IS device can be reduced, and an economical GIS device can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of a gas-insulated surge arrester combined grounding type instrument transformer according to a first embodiment of the present invention;
(A) is a transverse sectional view, (b) is a longitudinal sectional view.

FIG. 2 is a schematic diagram showing a configuration of a gas-insulated surge arrester combined grounding type instrument transformer according to a second embodiment of the present invention;
(A) is a transverse sectional view, (b) is a longitudinal sectional view.

FIG. 3 is a schematic view showing a configuration of a gas-insulated surge arrester combined grounding type instrument transformer according to a third embodiment of the present invention;
(A) is a transverse sectional view, (b) is a longitudinal sectional view.

FIG. 4 is a schematic diagram showing a configuration of a gas-insulated surge arrester composite grounding type instrument transformer according to a fourth embodiment of the present invention;
(A) is a transverse sectional view, (b) is a longitudinal sectional view.

FIG. 5 is a schematic view showing a configuration of a gas-insulated surge arrester composite grounding type instrument transformer according to a fifth embodiment of the present invention;
(A) is a transverse sectional view, (b) is a longitudinal sectional view.

FIG. 6 is a schematic diagram showing a configuration of a gas-insulated surge arrester combined grounding type instrument transformer according to a sixth embodiment of the present invention;
(A) is a transverse sectional view, (b) is a longitudinal sectional view.

FIG. 7 is a schematic diagram showing a configuration of a gas-insulated surge arrester combined grounding type instrument transformer according to a seventh embodiment of the present invention;
(A) is a transverse sectional view, (b) is a longitudinal sectional view.

FIG. 8 is a schematic diagram showing an example of a configuration of a conventional gas-insulated surge arrester complex grounding type instrument transformer, where (a) is a cross-sectional view,
(B) is a longitudinal sectional view.

FIG. 9 is a schematic diagram showing a configuration example of a conventional gas-insulated surge arrester complex grounding type instrument transformer, where (a) is a cross-sectional view,
(B) is a longitudinal sectional view.

[Explanation of symbols]

 1, 1a, 1b, 1c: iron core 2, 2a, 2b, 2c: high-voltage winding 3, 3a, 3b, 3c: low-voltage winding 4, 4a, 4b, 4c: VT content element 5a, 5b, 5c: element 6a , 6b, 6c high-voltage electrode 7a, 7b, 7c LA element 8 insulating gas 9 metal container 10a, 10b, 10c connection conductor 11 insulating spacer 12a, 12b, 12c high-voltage terminal

Claims (7)

[Claims] 1. A grounding-type instrument transformer comprising an iron core and high-voltage and low-voltage windings wound around the iron core, and an arrester lightning element are housed together with an insulating gas in the same metal container. A gas-insulated surge arrester combined grounding type instrument transformer having one end of the high voltage winding connected to the content element of the lightning arrester, wherein the content element of the lightning arrester vertically arranged in the metal container; A gas-insulated surge arrester combined ground-type instrument transformer, wherein the contents of the instrument transformer are arranged vertically above and below the metal container. 2. The grounding-type instrument transformer includes:
The transformer for a gas-insulated surge arrester combined grounding type instrument according to claim 1, wherein the transformer is arranged vertically. 3. An element of the grounded-type instrument transformer,
2. The transformer for a gas-insulated surge arrester combined grounding type instrument according to claim 1, wherein the transformer is arranged horizontally. 4. The grounding-type instrument transformer includes:
2. The transformer for a gas-insulated surge arrester combined grounding type instrument according to claim 1, wherein the transformer is inclined. 5. The grounding-type instrument transformer includes three-phase components, at least one of which is arranged on the same plane as the arrester, and the remaining at least one-phase component. 2. The device according to claim 1, wherein the device is disposed at a lower position.
The transformer for a gas-insulated surge arrester combined grounding-type instrument described in the above. 6. The gas-insulated surge arrester combined ground-type instrument transformer according to claim 5, wherein the content elements of said ground-type instrument transformer disposed below said horizontal direction are arranged. 7. The gas-insulated surge arrester combined ground-type instrument transformer according to claim 5, wherein the content elements of said ground-type instrument transformer disposed below said lower side are inclined.