JPH08317540A - Gas-insulated bus - Google Patents

Abstract

PURPOSE: To improve the reliability by reducing an installation area of a gas- insulated switching device and making a compact configuration with the center of gravity located at a low position. CONSTITUTION: Insulation spacers 24 and 26 are installed respectively in lead wire portions 27a and 27b for storing conductors 28 and 29 in the interior of a container 27 having lead wire portions 27a and 27b facing each other and a lower lead wire portion 27c, and an MOF-CT19 is connected to the lower lead wire portion 27c. The conductor 28 is connected to connecting terminals 24a and 19a, and the conductor 29 is connected to connecting terminals 26a and 19b. The conductors 28 and 29 are fixed to an insulating plate 30 arranged between the conductors 28 and 29.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated bus bar containing a conductor, and more particularly to a gas-insulated bus bar having an improved conductor structure.

[0002]

2. Description of the Related Art A gas-insulated switchgear (hereinafter referred to as GI) constructed by housing various devices in an airtight container filled with an insulating gas.
S) has a merit that it is small and has excellent insulation reliability, and therefore, it has been widely used in general large-capacity consumers in recent years, and further improvement and development are required. This GIS includes, for example, busbars, circuit breakers, disconnectors,
It is composed of equipment such as grounding switch, current transformer for instrument, transformer for instrument, cable head, etc., and a device for measuring electric energy (hereinafter referred to as MOF) is installed on the power receiving side. Has been done. The MOF includes a current transformer (hereinafter referred to as MOF-CT) that measures current and a transformer (hereinafter referred to as MOF-PT) that measures voltage.

Here, a conventional GIS in which a MOF is installed will be described with reference to FIGS. FIG. 5 is a single line connection diagram of the power receiving circuit, and FIG. 6 is an arrangement configuration example based on this single line connection diagram. 1 is a vertical type circuit breaker, and this circuit breaker 1 is installed on a frame 2. At the upper outlet 1a of the circuit breaker 1, a current transformer 3 for an instrument, a work ground switch 4,
A line-side device including a line disconnector 5, an instrument transformer 6, a line grounding switch 7, a lightning arrester 8 and a cable head 9 is connected in order. The cable head 9 is then connected to a power cable (not shown).

On the other hand, in the lower outlet portion 1b of the circuit breaker 1, a main bus bar equipped with a current transformer 10 for an instrument, MOF connection bus bars 11, 12, 13 and a grounding switch 15a installed above the main bus bar 14 is provided. The disconnector 15 is connected in a straight line. Below the MOF tangential bus 11, the MOF-PT 17 mounted on the mount 16 is connected, and below the MOF connecting bus 12, the M mounted on the mount 18
OF-CT19 is connected. Thus, in FIG. 6, the MOF connection buses 11, 12, 13 and MOF-PT, MO.
MOF is composed of F-CT19.

The MOF connection bus bar 12 will now be described with reference to FIG. The MOF connection bus bar 12 includes a container 21 in which the horizontally facing outlets 21a and 21b and a lower outlet 21c are formed, and two conductors housed inside the container 21.
It is composed of 22 and 23. Inlet 21a is an insulating spacer
Is connected to the MOF connection bus bar 11 via 24, and the lead portion 20b is connected to the MOF connection bus bar 13 via an insulating spacer 25,
The lower outlet 21c is connected to the MOF-CT19. The conductors 22 and 23 are formed of a single member having bending portions 22R and 23R each having a bending radius R. One end of the conductor 22 is supported and fixed to the connection terminal 24a supported by the insulating spacer 24 so as to be conductive, and the other end thereof is connected to the connection terminal 24a. The connection terminal 19a formed on the MOF-CT 19 is supported and fixed so that it can be energized. On the other hand, one end of the conductor 23 is electrically supported and fixed to the connection terminal 25a supported by the insulating spacer 25, and the other end thereof is electrically supported and fixed to the connection terminal 19b formed on the MOF-CT19.

The MOF connection bus bar 13 is a main bus line disconnector 15
The conductor 13a is supported and fixed to the connecting terminal 26a supported by the insulating spacer 26 such that the conductor 13a can be energized. The main circuit current 1 of the GIS is passed through the MOF-CT 19 by the conductors 22 and 23.

From such MOF connection bus 12 to MOF-
When removing the CT19, the MOF-CT19 was moved downward and further moved horizontally to remove it. For this reason,
It is necessary to secure a working space below and on the side of the MOF-CT19. The MOF-CT19 is placed on the pedestal 18, and M
The MOF connecting bus 12 was connected to the main bus disconnector 15 via the OF connecting bus 13.

[0008]

However, in such a conventional MOF connecting bus bar 12, the accommodated conductors 22 and 23 are formed by a single member having bent portions 22R and 23R having a bending radius R, respectively. Therefore, the diameter of the container 21 is large, and the insulating spacer 25 supporting the end portion of the conductor 23 is arranged at the outlet portion 21b, resulting in a large GIS. Further, since the MOF-CT 19 is placed on the gantry 18 in order to secure a lower space, the center of gravity is at a high position and it is necessary to strengthen the gantry 18 and the foundation for vibration resistance. Therefore, an object of the present invention is to provide a small-sized and highly reliable gas-insulated bus bar that reduces the GIS installation area in order to solve the above problems.

[0009]

In order to achieve the above-mentioned object, as the invention according to claim 1, the first opening portion and the first opening portion are formed so as to face each other on substantially the same axis. A container filled with an insulating gas having a second outlet and a third outlet formed in a direction perpendicular to the axis of the outlet, and the first outlet. A first conductor, one end of which is supported by the arranged first support member and the other end of which is supported by a third support member, which is arranged at the third opening, and a second conductor, which is arranged at the second opening. A second conductor whose one end is supported by the second support member and whose other end is supported by the third support member, and the second conductor and the first conductor.
A gas-insulated bus bar having an insulating member disposed between the conductor and the conductor and fixed to each conductor.

The invention according to claim 2 is characterized in that an insulating member mounting portion having an opening larger than a contact area with the insulating member is formed on at least one of the first conductor and the second conductor. A gas-insulated bus bar as described is provided.

The invention as claimed in claim 3 is the first aspect.
The gas-insulated bus bar according to claim 1 or 2, wherein an L-shaped bent portion is formed on the conductor and the second conductor. Further, as the invention according to claim 4, the first conductor and the second conductor are configured by detachably connecting a plurality of members each having a size capable of being taken out from the first or second lead portion, respectively. A gas-insulated bus bar according to any one of claims 1 to 3 is provided.

Further, as a fifth aspect of the invention, a fourth opening portion facing the third opening portion is formed in the container, and the first conductor and the second conductor are respectively connected on the shaft. A conductor having an L-shaped bent portion that can be attached and detached at a portion and a linear conductor, and the length from the connecting portion of the first conductor to the connecting portion of the second conductor is the fourth lead portion. The gas-insulated bus bar according to claim 1 or 2, wherein the inner diameter is less than or equal to the inner diameter.

[0013]

According to the first aspect of the present invention, the rigidity is secured by fixing the first conductor and the second conductor to an insulating member arranged between the first conductor and the second conductor. Therefore, even if the conductor is long in the axial direction, the conductor in the container can be supported by the support members at the respective outlets without disposing the support member in the middle.

According to the second aspect of the present invention, by further housing the insulating member in the opening, the surface electric field of the insulating member can be relaxed by the shield effect of the conductor.
According to the invention of claim 3, by further forming an L-shaped refraction portion in the first conductor and the second conductor,
The inner diameter of the third outlet portion can be reduced, and the container can be downsized.

According to the invention of claim 4, the first and second conductors are further composed of a plurality of members,
The conductor can be easily taken out. According to the invention of claim 5, the length from the connecting portion of the first conductor to the connecting portion of the second conductor is set to be equal to or less than the inner diameter of the fourth lead portion, so that it is fixed to the insulating member. The conductor having the bent portion on the open side can be easily taken out, and the device connected to the third lead-out part can be easily moved after taking out the conductor.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An MOF tangent busbar to which a MOF-CT19 is connected will be described as an embodiment of the gas insulated busbar according to the present invention with reference to FIGS. Note that the same parts as those in FIG. FIG. 1 is a structural diagram of a MOF connection bus bar showing a first embodiment.

27 is an MOF connection bus bar filled with insulating gas
There are 12 containers, and the container 27 is formed with outlet portions 27a and 27b and a lower outlet portion 27c that are opposed to each other in the horizontal direction.
Inside the container 27, two conductors 28 and 29 are housed. The conductor 28 has a connection terminal 24a at one end and a connection terminal at the other end.
It is connected to 19a and is supported and fixed so that it can be energized. The conductor 29 has one end connected to the connection terminal 26a and the other end connected to the connection terminal 19b, and is supported and fixed so as to be energized. Further, an insulating plate 30 is arranged between the conductor 28 and the conductor 29 so as to be in contact with the surface of each conductor, and fixed by bolts 31 and 32 from the conductors 28 and 29, respectively.

By fixing the conductor 28 and the conductor 29 with the bolts 31 and 32 via the insulating plate 30 in this manner, the conductor
Since the rigidity of the conductor 28 and the conductor 29 is improved and the resistance to electromagnetic force is improved, the conductor 29 can be made long, and the conductor of the connection terminal 25a supported by the insulating spacer 25 and the MOF connection busbar 13 as in the conventional case. It is possible to connect the conductor 29 directly to the connection terminal 26a without interposing the 13a. Therefore, the insulating spacer 25 becomes unnecessary, and the MOF connection busbar 13 is
It is possible to provide a highly reliable MOF connection bus which can be integrated with the connection bus 12 and has a small size, simplification, and a small number of parts.

In this embodiment, the insulating plate 30 is connected to the conductor 2
Although fixed to the surfaces of 8 and 29 with bolts 31 and 32, as shown in FIG. 2, the mounting portions 33 having openings larger than the contact area with the insulating plate 30 in the conductors 28 and 29, 34 are respectively formed, the insulating plate 30 is housed in the mounting portions 33, 34, and the bolts 31,
It may be fixed by 32. By forming the mounting portions 33 and 34, the insulating plate 30 housed in the mounting portions 33 and 34 is the conductor 2
Due to the shielding effect of 8 and 29, the surface electric field can be relaxed and the reliability can be further improved.
The same effect can be obtained even if the mounting portion is formed only on one of the conductors 28 and 29.

Next, a second embodiment will be described with reference to FIG. The same parts as those in FIGS. 1, 2 and 7 are designated by the same reference numerals and the description thereof will be omitted. Reference numeral 35 is a container for the MOF connection busbar 12, and this container 35 has a mouth portion 35 facing in the horizontal direction.
a, 35b and a lower outlet 35c are formed. Inside the container 35, two sets of conductors 36 and 37 are housed.
One end of the conductor 36 is connected to the connection terminal 24a and has an L-shaped bent portion.
It is composed of a conductor 36a having 36L and a linear conductor 36b arranged vertically with one end thereof connected to the other end of the conductor 36a and the other end thereof connected to the connection terminal 19a. The conductor 37 has one end connected to the connection terminal 26a and has an L-shaped bent portion.
It is composed of a conductor 37a having 37L and a linear conductor 37b having one end connected to the other end of the conductor 37a and the other end connected to the connection terminal 19b. Refraction part 36 of conductor 36a
The length from L to the connecting portion with the conductor 36b and the length from the bent portion 37L of the conductor 37a to the connecting portion with the conductor 37b are set to the lead portion 35.
a or shorter than the inner diameter of the lead portion 35b, and the conductors 36a, 37
A is detachably connected to the conductors 36b and 37b, respectively.

The insulating plate 30 is provided between the conductor 36a and the conductor 37a.
Are fixed by bolts 31 and 32 by conductors 36a and 37a, respectively. In this way, the conductors 36 and 37 are respectively connected to the two conductors 36a and 36b and the conductors at predetermined positions in the vertical portions of the conductors.
Since it can be divided into 37a and 37b, each outlet 35 of the container 35
It is possible to assemble the conductors 36 and 37 regardless of the lengths of a, 35b, and 35c.

Further, since the conductors 36a, 37a are formed with L-shaped bent portions instead of bent portions having a large radius, it is possible to reduce the inner diameter of the lower lead-out portion 35c. Therefore, according to this embodiment, the same result as in the first embodiment can be obtained, and the container 35 can be downsized, and the length of the GIS can be shortened and the installation area can be reduced.

Next, a third embodiment will be described with reference to FIG. The same parts as those in FIGS. 1 to 3 and 7 are designated by the same reference numerals and the description thereof will be omitted. 38 is the MOF connection bus bar 12
The container 38 is formed with horizontally extending outlet portions 38a, 38b and a lower outlet portion 38c, and further has an inspection outlet portion 38d facing the lower outlet portion 38c. There is. The inspection outlet 38d is closed by a removable lid 38e. Inside the container 38, two sets of conductors 39 and 40 are stored. One end of the conductor 39 is a linear conductor 39a which is connected to the connection terminal 24a and is arranged horizontally, and the conductor 39a.
Is connected to the other end by means of a bolt 41 so as to be detachable, and has an L-shaped bent portion 39L, and the other end is formed of a conductor 39b connected to the connection terminal 19a. The conductor 40 has a linear conductor 40a which is connected to the connection terminal 26a at one end and is arranged horizontally, and a bolt 42 having one end at the other end of the conductor 40a.
And a conductor 40b having an L-shaped bent portion 40L removably connected to the other end and having the other end connected to the connection terminal 19b. The conductor 39b and the conductor 40b are fixed by bolts 31 and 32 via the insulating plate 30.

From the connecting portion between the conductor 39a and the conductor 39b to the conductor 40
The length up to the connection between a and the conductor 40b is
The length is shorter than the inner diameter length of d. Conductor 39,
40 on each horizontal part of the conductor at a predetermined position and two conductors 39a,
Since it can be divided into 39b and conductors 40a and 40b, bolt 4
By removing 1, 42, the conductor 39b and the conductor 40b can be taken out from the inspection opening 38d. MOF-CT
It is possible to remove the 19 by moving it horizontally without moving it downward.

Therefore, in addition to the effects of the above embodiment, MOF-
Since it is not necessary to secure a space below CT19 and the gantry 18 is not necessary, MOF-CT19 can be arranged at a low position, and as a result, the center of gravity is lowered and a GIS excellent in vibration resistance can be provided.

[0026]

As described above, according to the present invention, the first
Since the conductor and the second conductor are fixed to the insulating member arranged between the conductors, the rigidity of the conductor is improved, and a small size and highly reliable gas-insulated bus bar can be provided.

[Brief description of drawings]

FIG. 1 is a structural view showing a first embodiment of a gas insulated bus bar according to the present invention.

FIG. 2 is a structural view showing another embodiment of the gas insulated bus bar according to the present invention.

FIG. 3 is a structural diagram showing a second embodiment of the gas-insulated bus bar according to the present invention.

FIG. 4 is a structural diagram showing a third embodiment of the gas insulated bus bar according to the present invention.

FIG. 5 is a single wire connection diagram showing a connection configuration of a conventional gas insulated switchgear.

FIG. 6 is a configuration diagram of a conventional gas-insulated switchgear.

FIG. 7 is a configuration diagram of a conventional gas-insulated bus bar.

[Explanation of symbols]

19 ... MOF-CT, 19a, 19b ... Connection terminal, 24, 26 ... Insulation spacer, 24a, 26a ... Connection terminal, 27, 35, 38 ... Container, 30 ... Insulation plate 27a, 35a, 38a ... Exit part (No. 1 mouth), 27b, 35
b, 38b ... Lead portion (second lead portion), 27c, 35c, 38c
... Lower outlet (third outlet), 38d ... Inspection outlet (fourth outlet), 28, 36, 39 ... Conductor (first conductor),
29, 37, 40 ... Conductor (second conductor), 28a, 29a, 36a,
37a, 39a, 40a ... conductor, 28b, 29b, 36b, 37b, 39
b, 40b ... conductor, 36L, 37L, 39L, 40L ... refraction part, 33
… Openings, 31, 32, 41, 42… Bolts.

Claims (5)

[Claims] 1. A first lead-out portion, a second lead-out portion formed to face the first lead-out portion on substantially the same axis, and perpendicular to the axes of these lead-out portions. A container filled with an insulating gas having a third outlet formed in a direction, and one end supported by a first support member arranged in the first outlet and the other end being the third One end is supported by the first conductor supported by the third support member disposed at the outlet of the second conductor and one end is supported by the second support member disposed at the second outlet of the second conductor, and the other end is supported by the second conductor. Gas insulation, comprising: a second conductor supported by the third support member; and an insulating member disposed between the second conductor and the first conductor and fixed to each conductor. Busbar. 2. The mounting portion of the insulating member having an opening larger than a contact area with the insulating member is formed on at least one of the first conductor and the second conductor. 1. The gas-insulated bus bar according to 1. 3. The gas-insulated bus bar according to claim 1, wherein an L-shaped bent portion is formed in each of the first conductor and the second conductor. 4. The first conductor and the second conductor are configured by detachably connecting a plurality of members each having a size capable of being taken out from the first or second opening portion, respectively. The gas insulated bus bar according to any one of claims 1 to 3. 5. The container is formed with a fourth mouth portion facing the third mouth portion, and the first conductor and the second conductor are attachable / detachable at the connection portions on the shaft, respectively. It is composed of a conductor having an L-shaped bent portion and a linear conductor, and the length from the connecting portion of the first conductor to the connecting portion of the second conductor is equal to or less than the inner diameter length of the fourth lead portion. The gas-insulated bus bar according to claim 1 or 2, characterized in that.