JPH1084607A - Gas-insulated safety enclosed switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a gas-insulated safety enclosed switchgear capable of exhibiting the advantage of gas insulation by reducing the depth of the box. SOLUTION: A space P1 in the interphase direction of insulating bushings 7N, 7O, 7P provided parallel the top part of a box is made narrower than the width W of the head part 7a of the insulating bushings 7N, 7O, 7P. Therefore, the side surface of a trapezoidal part formed at the right side of the first phase insulating bushing 7N is opposed and mutually adjacent to the side surface of a trapezoidal part at the left side of the second phase insulating bushing 7O. The third insulating 7P to be provided at the rear of the second insulating bushing 7O is positioned in the same manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a gas-insulated metal closed switchgear.

[0002]

2. Description of the Related Art An example of a conventional gas insulated metal closed type switchgear is shown in FIG.
FIG. 12 shows a plan assembly view of the above. The gas-insulated metal closed switchgear shown in FIGS. 11 and 12 is a so-called primary 2CB-
In a two-line power receiving facility of the 1VCT-secondary 2CB system, the power receiving side is pulled in from under the floor of the box, and the mutual connection and the load side are connected by a ceiling.

In FIGS. 11 and 12, a transformer for an instrument for electric power trading (hereinafter referred to as VCT) 40 is provided at the center.
Are mounted on both sides of an instrument transformer board (hereinafter, referred to as a VCT board) 51 in which a first transformer 50A and a second transformer 50 are connected in parallel by a cable to the load side of the VCT board 51. The primary board 50B is symmetrically disposed adjacent to the primary board 50B.

[0004] Outside the primary transformer 50A and the primary transformer 50B, the first power receiving panel 49A connected to the power supply side of the VCT board 51 is different from the first power receiving panel 49. A No. 2 power receiving panel 49B connected to the power supply side of the system is symmetrically provided adjacently.

[0005] A cable connected to a lead-in wire of a power receiving facility in which the gas-insulated metal closed switchgear is installed is provided at a lower end of a cable head 32A housed in a rear lower end of a leftmost No. 1 power receiving panel 49A. The current transformer 31A is attached to this cable.

[0006] The upper end of the cable head 32A is connected to the power supply side of a lightning arrester 33A, a voltage detector 34A, a grounding disconnector 35A and a primary disconnector 36A which are housed in order in the upper part of the cable head 32A. Load side is vacuum circuit breaker
It is connected to the power supply side of 37A.

The load side of the vacuum circuit breaker 37A is connected to an insulating bushing 46A for external connection, which is vertically penetrated through the secondary disconnecting switch 38A to the ceiling of the box of the first power receiving panel 49A, as shown in FIG. It is connected to the lower end.

Similarly, the lower end of the cable head 32B housed at the rear lower end of the No. 2 power receiving panel 49B at the right end is connected to a service line of a different system of the power receiving equipment in which the gas-insulated metal closed switch gear is installed. A cable is connected, and a current transformer 31B is attached to the cable.

The upper end of the cable head 32B is connected to the power supply side of a lightning arrester 33B, a voltage detector 34B, a grounding disconnector 35B and a primary disconnector 36B which are housed in order in the upper part of the cable head 32B. Load side is vacuum circuit breaker
It is connected to the power supply side of 37B.

The load side of the vacuum circuit breaker 37B passes through a secondary disconnector 38B, and a ground disconnector 39 for bus grounding and a No. 2 power receiving board.
It is connected to the lower end of an insulating bushing 46B for external connection, which will be described in detail in FIG.

At the upper end of the insulating bushing 46B, the above-mentioned insulating bushing penetrating the ceiling of the No. 1 power receiving panel 49A.
An R-phase high-pressure cross-linked polyethylene cable (hereinafter simply referred to as a cable) connected to the upper end of 46A and the upper end of an insulating bushing 46E on the power supply side penetrating the ceiling of the VCT panel 51.
The right end of the first bus 47 that forms the primary bus is connected to the 47a and S-phase cables 47b and the T-phase cable 47c.

The first bus 47 is connected to a first power receiving board 49A and a first transformer primary board 50 together with a second bus 48 to be described later.
A, VCT board 51, No. 2 transformer primary board 50B and No. 2 power receiving board 49
B is covered by a cable duct (not shown) placed on the upper part of B.

[0013] Next, a cable that runs through the upper end of the primary transformer 50A and is connected to the primary transformer (not shown) includes:
The current transformer 45A shown in FIG.
Is connected to the power supply side of the ground disconnecting switch 43A and the load side of the vacuum circuit breaker 42A.

The conductor connected to the power supply side of the vacuum circuit breaker 42A is a disconnector housed under the vacuum circuit breaker 42A.
After passing through 41A, the rear part of the primary panel 50A of the No. 1 transformer rises and is connected to the lower end of an insulating bushing 46C for external connection penetrating the rear part of the ceiling.

Similarly, a current transformer 45B is connected to a cable extending through the upper end of the No. 2 transformer primary panel 50B and connected to a No. 2 transformer (not shown), and a lower end of the cable head 44B is connected to a ground disconnector 43B. And the load side of the vacuum circuit breaker 42B.

A conductor connected to the power supply side of the vacuum circuit breaker 42B is a disconnector housed under the vacuum circuit breaker 42B.
After passing through 41B, the rear part of the No. 2 transformer primary board 50B rises, and is connected to the lower end of an external connection insulating bushing 46D penetrating the rear part of the ceiling.

At the upper end of the insulating bushing 46D, the upper end of the above-mentioned insulating bushing 46C penetrating the ceiling of the primary transformer primary panel 50A and the load-side insulating bushing penetrating the ceiling of the VCT panel 51. The right end of the second bus bar 48 connected to the upper end of 46F is connected.

The upper end of the conductor connected to the power supply side terminal of the VCT 40 housed in the VCT board 51 is connected to the lower end of an insulating bushing 46E which extends vertically in the middle of the ceiling of the VCT board 51 and slightly forward. The upper end of the conductor connected to the load-side terminal is connected to the lower end of an insulating bushing 46F which extends vertically through the center of the ceiling of the VCT board 51 and slightly behind.

FIG. 13 is an enlarged longitudinal sectional detail view of the first power receiving panel 49A and the second power receiving panel 49B shown in FIGS. 11 and 12.
The figure seen from the right side is shown. In FIG. 13, the box 52 is provided with a substantially U-shaped partition 52a for partitioning the central portion from the front and rear,
An L-shaped partition 52b is provided between the front central portion of the partition 52a and the ceiling plate, and a U-shaped partition 52c is provided in front of the partition 52a. These partitions 52a, 52
A sulfur hexafluoride gas is sealed in the insides of b and 52c.

Among them, a vacuum circuit breaker 37A (37B) shown in FIG. 11 is housed inside the partition 52c, and the upper electrode of the vacuum circuit breaker 37A (37B) The lower pole of the vacuum circuit breaker 37A (37B) is connected to the front end of a lower spacer penetrating the lower partition of the upper spacer.

The operation mechanism 37a of the vacuum circuit breaker 37A (37B) is housed below the partition 52c below the vacuum circuit breaker 37A (37B). The disconnecting portion of the primary disconnector 36A (36B) is fixed to the rear side below the front side of the partition 52a, and the upper pole of the primary disconnector 36A (36B) is connected to the rear end of the lower spacer.

The disconnecting portion of the grounding disconnector 35A (35B) is incorporated below the primary disconnecting switch 36A (36B), and the operating mechanism 35a of the grounding disconnector 35A (35B) is located below the front end of the partition 52c. It is protruding.

Primary disconnectors 36A, 36B and ground disconnector 35
A, 35B and the operating mechanism 35a are connected by operating rods indicated by alternate long and short dash lines disposed on the side surfaces of the box and bevel gears (not shown) for connecting these.

The lower pole of the primary disconnector 36A (36B) is a partition
A cable head 32A (32
B), is connected to the front end of a voltage detector 34A (34B) fixed laterally to the front of the rear end of the partition 52a. The front end of the voltage detector (34A, 34B) is connected to the cable head 32A (32).
B) The upper end of a lightning arrester 33A (33B) vertically penetrating the rear side is connected.

A secondary disconnector 38A is provided on the bottom surface of the partition 52b.
The disconnecting portion of (38B) is fixed. This secondary disconnector 38
The front end of A (38B) is connected to the rear end of the upper spacer. On the front surface of the partition 52c, an operation mechanism 38a of the secondary disconnector 38A (38B) protrudes slightly upward from the center.

An operating rod or the like indicated by a dashed line in the operating mechanism portion 38a rises on the side surface of the box 52, penetrates the upper front side of the partition 52a in a gas-tight manner, and descends on the side surface. 38A (38B) is connected to the central shaft of the mounting base.

Secondary disconnector 38 installed on No. 2 power receiving panel 49B
At the rear of B, a grounding disconnector 39 indicated by a dashed line is incorporated. The operating mechanism of the grounding disconnector 39 is an operating mechanism 38a.
Are arranged side by side.

The ceiling bushing above the secondary disconnector 38A (38B) has an insulating bushing 46A (46B) shown in FIG. 11 and FIG.
Are airtightly provided through the mounting base. The lower ends of these insulating bushings 46A (46B) are connected to the rear ends of the aforementioned secondary disconnectors 38A (38B).
At the upper end of A (46B), the first bus A-phase cable 47a, the B-phase cable 47c, and the C-phase cable shown in FIG.
47c are respectively connected. The vertical sectional views of the primary transformer 50A, the primary transformer 50B, and the VCT board 51 are omitted.

[0029]

However, in the gas insulated metal closed switchgear configured as described above, the depth of the box is limited by the number and width of the insulating bushings penetrating the ceiling. You.

The reason is that the first power receiving panel 49A shown in FIG.
The first transformer 50A and the second transformer shown in FIGS. 11 and 12 are attached to the rear of the insulating bushing 46A (46B) vertically installed on the ceiling of the box 52 of the second power receiving board 49B. Primary 50B
Insulation bushing for cable connecting VCT board and VCT board 51
It is necessary to provide a space for mounting 46C and 46D, as shown in FIG. 12, including the mounting parts of the primary bushing of the No. 1 transformer, the primary board of the No. 2 transformer, and the insulating bushing of the VCT board 51. This is because the layout of the main circuit devices must be determined.

For this reason, in the first transformer 50A and the second transformer 50B, the cable heads 45A and 45B connected to the load side are provided in the front as shown in FIG. The width occupied in the front-rear direction is made orthogonal to the rear insulating bushings 46C and 46D, but this method is further downsized to accommodate newly developed and downsized vacuum circuit breakers and disconnectors. It cannot be used for boxes.

In particular, at the request of the user, the VCT board 51
When the cables are not installed at the center as shown in FIGS. 11 and 12, but are installed next to the left end or the right end, or when the load has three banks, the cables arranged in six rows in the front-rear direction in FIG. Since the rows are arranged, the depth of the box body is increased, and the feature of the miniaturized gas insulated metal closed switchgear is impaired. SUMMARY OF THE INVENTION An object of the present invention is to provide a gas-insulated metal-closed gas-insulated switchgear which can reduce the depth of a box and exhibit the characteristics of gas insulation.

[0033]

According to a first aspect of the present invention, a plurality of insulating bushings to which a cable is connected on at least one side of a trapezoid formed on both sides of a head are adjacent to an outer wall of a box. In the gas-insulated metal closed switchgear inserted in parallel with each other, the side of the trapezoid on one side of the first insulating bushing and the side of the trapezoid on the other side of the second insulating bushing are adjacent to each other. The side surface of the trapezoid on one side of the bushing is adjacent to the side surface of the trapezoid on the other side of the third insulating bushing.

According to a second aspect of the present invention, one side is connected to a load side of a first power receiving panel for receiving the power of the first system and a second power receiving panel for receiving the power of the second system. First and second power receiving-side bus connecting / disconnecting devices, the other sides of which are connected to each other, a first load-side bus connecting / disconnecting device having one side connected to the load side of the first power receiving panel, and a second power receiving device One side is connected to the load side of the panel via a transformer for an instrument, and the other side is a load side of the first load side bus disconnector and a second load side bus connecting disconnector connected to the load side transformer. In a gas insulated metal closed switchgear for bus communication housed in a body, a first insulating bushing group connected to a load side of a first power receiving panel and one side of a first power receiving side bus connecting disconnector is provided. It penetrates one side forward of the ceiling of the body and is connected to the load side of the second power receiving panel and one side of the second busbar connecting disconnector. A second insulating bushing group extending in front of the other side of the ceiling of the box body, and a third insulating bushing connected to the load side of the first power receiving panel and one side of the first load-side bus connecting disconnector; A fourth insulated bushing group in which a bushing group extends through the other side of the ceiling part of the box body and one side is connected to the instrument transformer and the other side is connected to the other side of the second load-side bus connecting / disconnecting device. Is provided in front of the other side of the ceiling of the box body.

Further, the gas insulated metal closed type switchgear according to the third aspect of the present invention comprises a first, a second, a third and a fourth.
The side of the trapezoid on one side of the first phase insulating bushing of the group of insulating bushings is adjacent to the side of the trapezoid on the other side of the insulating bushing of the second layer. The three-phase insulating bushing is characterized in that the side surfaces of the trapezoid on the other side are adjacent to each other.

Further, in the gas insulated metal closed switchgear according to the fourth aspect of the present invention, the second phase insulating bushing of the fifth insulating bushing group is connected to the third phase and the fourth phase of the second insulating bushing group. A first phase insulating bushing of a fifth insulating bushing group provided between the first phases of the insulating bushing group, and a first phase insulating bushing of the fifth phase of the first and second insulating bushing groups; The third phase of the insulating bushing group is provided on the other side of the third phase of the third and fourth insulating bushing groups.

The gas insulated metal closed switchgear of the invention according to claim 5 is provided with a first and a first partitioning the box body back and forth.
A first gas insulating chamber is formed below the first and second vertical partitions by a horizontal partition that vertically separates the second and third vertical partitions and the vertical partitions between the first and second vertical partitions. A second gas insulating chamber is formed at the upper part of the first and second gas insulating chambers, a third gas insulating chamber is formed at the lower part of the second and third vertical partitions, and a fourth gas insulating chamber is formed at the upper part of the second and third vertical partitions. And the first gas-insulated chamber houses the first power-receiving-side bus-connection disconnector, the second gas-insulated chamber houses the second power-receiving-side bus-connection disconnector, and the third gas-insulated chamber. And a second load-side bus connection disconnector housed in the fourth gas insulating chamber.

According to a sixth aspect of the present invention, there is provided the first power receiving apparatus, wherein the first insulating bushing group connected to the load side and receiving the power of the first system is provided through the ceiling of the box. Board and
A second power receiving panel that receives the power of the second system and has a second insulating bushing group connected to the load side penetrated through the ceiling;
A first and a second transformer primary panel adjacent to opposite sides of the first and second power receiving panels and supplying power to a load side, and a box disposed between the first and second transformer primary panels The third penetrating the ceiling
The first and second insulating bushings are connected to the first and second insulating bushing groups through the instrument transformer housed therein and the first and second insulating bushing groups penetrating the ceiling.
And a VCT board connected to a fifth and a sixth insulating bushing group penetrating the ceiling of the transformer primary board, the first phase of the fourth insulating bushing group. And the second phase are provided before and after the third insulating bushing group, the second phase of the fourth insulating bushing group is shared with the second phase of the third insulating bushing group, and the fifth and sixth insulating bushing groups are provided. Is connected to the second phase of the first and second insulating bushing groups.

Furthermore, the gas insulated metal closed switchgear according to the invention according to claim 7 is characterized in that the trapezoidal portion on one side of the first phase of the first, second and third insulating bushing groups is connected to the side of the second phase. The side surface of the trapezoid on the other side is adjacent, and the side surface of the trapezoid on one side of the second phase is adjacent to the side surface of the trapezoid on the other side of the third phase.

A gas insulated metal closed switchgear according to the invention according to claim 8 is provided in an upper insulating gas chamber provided at an upper portion of a box body and having a load-side disconnector provided at a front end thereof. A power receiving vacuum circuit breaker formed below the chamber and having an upper electrode connected to a lower electrode of the load-side disconnector is provided at an upper portion of the front end, and the power receiving vacuum circuit breaker is provided below the power receiving vacuum circuit breaker. A lower insulating gas chamber in which a power-supply disconnector is connected through the lower pole to the upper pole, and a box body penetrating through the ceiling of the upper insulating gas chamber and having a lower end connected to the upper pole of the load-side disconnector And an insulating bushing whose upper part is connected to the boxes arranged side by side.

According to a ninth aspect of the present invention, there is provided a gas insulated metal closed switchgear, wherein a cable head formed at an intermediate portion of the box body and connected to a transformer on a load side is penetrated through a ceiling portion and is provided at a front end. A gas-insulated circuit breaker chamber through which the load-side vacuum circuit breaker is passed, and a disconnector formed at the rear and lower portions of the gas-insulated circuit breaker chamber and having an upper electrode connected to a lower electrode of the load-side vacuum circuit breaker at the front end. A gas insulated disconnector chamber having a lower pole connected to the lower end of the disconnector connected to the lower end and an upper part connected to the box arranged side by side with the box, and an insulating bushing penetrated through the ceiling; It is characterized by.

Further, in the gas-insulated metal closed switchgear according to the tenth aspect of the present invention, an insulating bushing extends through the ceiling, and a disconnector having an upper pole connected to the lower end of the insulating bushing extends through the front end. A disconnector chamber filled with insulating gas and a load-side vacuum circuit breaker formed at the lower and rear portions of the disconnector chamber and connected to the lower pole of the disconnector and having an upper pole connected to the front end thereof. A cable head having a lower end connected to the lower pole of the circuit breaker and an upper side connected to the transformer on the load side is provided with a circuit breaker chamber penetrating through the ceiling and filled with insulating gas. By such means, in the gas insulated metal closed switchgear of the present invention, the area occupied by the insulating bushing on the outer wall and ceiling of the box is reduced.

[0043]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the gas-insulated metal switchgear of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a first embodiment of a gas insulated metal closed switchgear according to the present invention, which corresponds to claims 1 to 4 and corresponds to FIG. 12 shown in the prior art. is there.

However, as shown in FIG. 3, which will be described later, the load side has three banks (transformers), and the bus bar connecting board 3 shown in FIG. A disconnecting switchboard (not shown) is incorporated in detail, and as a result, the number of cables and insulating bushes connecting the equipment inside each box at the ceiling of each box increases, and the numbers are complicated.

FIG. 3 is a single-line diagram of the main circuit of the power receiving equipment shown in FIG. 1, and FIG. 4 is a state in which the main circuit devices shown in FIG. 3 are distributed and stored in the respective boxes shown in FIG. Is a main circuit single line connection layout diagram corresponding to FIG. 11 shown in the related art.

First, in FIG. 1, on the left side of the wide-width VCT panel 1 shown at the right end of the rear row, a No. 2 transformer primary panel 2B is provided next to the VCT panel 1, and also on the right side of the VCT panel 1 due to space restrictions. A No. 3 transformer primary panel 2C shown in front of the upper VCT panel 1 is adjacently provided.

On the left side of the left-side No. 2 transformer primary panel 2B, a bus bar 3 having a wide width, which will be described in detail later with reference to FIG. FIG.
A disconnecting switchboard 4, which will be described later with reference to FIG.

On the left side of the disconnecting switchboard 4, a primary transformer primary panel 2 A is provided adjacently, and on the left side of the primary transformer primary board 2 A, a power receiving panel 6 A connected to one system is adjacent. And
On the right side of the above-mentioned No. 3 transformer primary panel 2C, a power receiving panel 6B connected to a power supply of a different system on the other side is provided adjacently.

Among them, on the ceiling of the left power receiving panel 6A, as will be described later with reference to FIG. 6, which is an enlarged sectional view taken along the line BB of FIG. As shown in FIG. 5, insulating bushings 7A, 7B, 7C as connection terminals connected via A-phase cables 11A, B-phase cables 11B and C-phase cables 11C, which constitute one side of one bus, will be described in detail. In the plan view, it runs in a zigzag pattern.

No. 1 transformer primary panel 2A on the right side of power receiving panel 6A
Cable heads 10A, 10B and 10C connected to a step-down transformer (not shown) on the load side are penetrated at the front end of the ceiling part in the same manner as in FIG.
The insulating bushings 8A, 8B, 8C connected to the disconnecting switchboard 4 provided on the right side are the insulating bushings 7A, 7 on the left side.
As in B and 7C, they are provided in a staggered manner.

The above-mentioned A-phase cable 11 is attached to the ceiling of the disconnecting switchboard 4 adjacent to the right side of the first transformer primary board 2A.
Insulating bushings 7D, 7E, 7F to which the left ends are connected to the right ends of the A, B phase cables 11B, C phase cables 11C are provided in a staggered manner in the front.

These insulating bushings 7D, 7E, 7F
Behind, a left end is connected to the insulating bushings 8A, 8B, 8C penetrating the ceiling of the above-mentioned No. 1 transformer primary panel 2A by cables 12A, 12B, 12C.
D, 8E and 8F are also provided in a staggered manner.

In addition, an insulating bushing 7G whose left end is connected to the insulating bushing 7D, 7E, 7F of the left disconnecting switchboard 4 by a cable is provided on the ceiling of the busbar connecting panel 3 from the left intermediate portion to the front. , 7H, 7J are provided in a zigzag pattern.

These insulating bushings 7G, 7H, 7J
Behind the same, the left insulating bushing 8D, 8E,
Insulating bushings 8G, 8H, 8J whose left ends are connected by cables 12D, 12E, 12F extend through the right end of 8F.

Further, insulating bushings 7G, 7H, 7J
Insulating bushings 7K, 7L, and 7M are provided on the right side, and insulating bushings 8K, 8L, and 8M are provided behind these insulating bushes 7K, 7L, and 7M.

Between the two sets of left and right insulating bushings,
Among the cables constituting the third busbar connecting the below-described insulating bushings on the ceiling of the No. 2 transformer primary panel 2B, the insulating bushing 9A in which the left end of the A-phase cable 13A is connected to the right end is located forward. It is penetrated.

Behind the insulating bushing 9A, an insulating bushing 9B, which is also connected to the left end of the B-phase cable 13B at the right end, is provided at substantially the center of the ceiling with an interval. An insulating bushing 9C is formed at the rear end of the cable 13C. The left end of the cable 13C is connected to the right end.

On the other hand, cable heads 10D, 10E, and 10F whose front ends are connected to the primary side of the No. 2 transformer shown in FIG. 3 are also connected to the No. 1 transformer on the left side at the front end of the ceiling of the No. 2 transformer primary panel 2B. It is penetrated similarly to the container primary panel 2A.

These cable heads 10D, 10E, 10F
Are connected to the right ends of the insulating bushings 9A, 9B, 9C via the above-mentioned A-phase cables 13A, 13B, 13C, and the left insulating bushings 9A, 9B, 9C are connected to the left side. It is provided in a zigzag pattern at the same interval as.

Further, an insulating bushing 7 is provided on the ceiling of the VCT panel 1 at the right front of the ceiling of the busbar connecting panel 3.
Insulating bushings 7N, 7O, 7P connected through cables 11D, 11E, 11F constituting a part of the first bus are penetrated to the right ends of K, 7L, 7M.

These insulating bushings 7N, 7O, 7P
Insulating bushings 8N, 8O, 8P are provided through the right side of the rear side, and the left ends of these insulating bushings 8N, 8O, 8P are connected to the cables 12G, 12
Through H, 12J, it is connected to the right end of the insulating bushings 8K, 8L, 8M penetrating the right rear part of the ceiling of the busbar communication panel 3.

Of these, the front insulating bushings 7N, 7N
The right ends of the cables 11H, 11J, and 11K constituting the right end of the first bus bar connected to the right ends of the O and 7P are further provided on the right side of the primary transformer 2C of the No. 3 transformer provided on the right side of the VCT board 1. Insulated bushings 7Q, 7R, 7S penetrated through the ceiling of the power receiving panel 6B of the second system.

Similarly, the rear insulating bushings 8N, 8
The right end of the cable connected to the right end of O, 8P is VCT
It is connected to the left ends of insulating bushings 8Q, 8R, 8S that are provided behind the ceiling of the No. 3 transformer primary board 2C adjacent to the right side of the board 1.

As a result, a total of five (15 in total) insulating bushings are penetrated in the ceiling of the busbar communication panel 3 so as to be adjacent to each other in the front-rear direction so as to be able to arrange and connect the cables. In the front-rear direction, nine rows are arranged as shown in FIG. 2 described below.

FIG. 2 is an enlarged longitudinal sectional view taken along the line AA of FIG. 1 showing the arrangement of the insulating bushing penetrating the ceiling of the busbar communication panel 3 and the main circuit equipment inside the box. In FIG.
The box 22 of the busbar 3 is provided with a vertical partition 22b with respect to the center, and a partition 22b is provided in front of the partition 22b.
a, a partition 22c is provided vertically behind the partition 22b. In the middle of these partitions 22a, 22b and 22c, a horizontal partition 22f is provided between the partitions 22a and 22b, and a partition 22g is provided between the partitions 22b and 22c.

The gas insulation chamber surrounded by the partitions 22a, 22b and 22f has a disconnector 14 described later with reference to FIGS.
The disconnecting portion of A is housed together with the grounding disconnector 14a incorporated above the disconnector 14A, and the gas chamber surrounded by the partitions 22b, 22c and 22g also has the disconnecting portion of the disconnector 14B together with the grounding disconnector 14b. It is stored symmetrically. On the lower side of these disconnectors 14A, 14B, the upper poles are also spacers 22h, 22j.
The disconnecting portions of the disconnecting devices 14C and 14D connected to are connected.

Of these, the low pressure chamber formed on the left side of the left disconnectors 14A and 14C incorporates the operating mechanisms of these disconnectors and the ground disconnector, and also includes the right disconnectors 14A and 14C.
An operating mechanism is also incorporated in the low-pressure chamber formed on the right side of B and 14D.

On opposite sides of the partitions 22f and 22g, spacers 22h and 22j whose upper ends are connected to lower poles of the disconnectors 14A and 14B.
The spacers 22h and 22j have lower ends connected to the grounding disconnectors 14c and 14D above the disconnectors 14C and 14D housed in gas chambers formed below the partitions 22f and 22g.
d.

Further, the insulating bushings 7K, 7L, shown in FIG.
7M are pierced and these insulating bushings 7K, 7L,
Insulating bushings 8K, 8L, 8M also shown in FIG. 1 extend through the right side of 7M.

Further, at the front end of these insulating bushings, there are shown an insulating bushing 9A and a cable 13A shown at the front end of the central part of the bus bar 3 in FIG. 9B and a cable 13B are shown, and an insulating bushing 9C and a cable are provided at the rear end of the ceiling panel.
13C is shown.

The insulating bushings 7K, 7L, 7
The conductor connected to the lower end of M is connected to the rear end of the grounding disconnector 14a, and the conductor connected to the lower ends of the insulating bushings 8K, 8L, 8M is connected to the front end of the grounding disconnector 14b.

Similarly, the conductor connected to the rear end of the disconnecting switch 14C is disposed in a direction perpendicular to the plane of the drawing via an insulator fixed to the bottom plate of the box, and then rises on the left side of the box to form a ceiling. It is connected to the lower ends of insulating bushings 7G, 7H, 7J penetrating the plate.

Similarly, the conductor connected to the front end of the lower end of the disconnector 14D is disposed in a direction perpendicular to the plane of the drawing via an insulator fixed to the lower bottom plate, and then rises on the left side of the box. , Insulating bushings 8G, 8H,
8J is connected to the lower end.

The conductor connected from the insulating spacer 22j penetrating through the partition 22g to the front end of the lower grounding disconnector 14d branches off with a fixed insulator at the middle part and is disposed in the direction perpendicular to the plane of the paper. After that, it is connected to insulating bushings 9A, 9B, 9C penetrating the ceiling. A duct cover (not shown) is attached to the ceiling, and each of the insulating bushings and cable heads penetrating the ceiling are covered with the duct cover.

FIG. 3 shows a single-line diagram of the main circuit of the gas insulated metal closed switchgear shown in FIGS. 1 and 2 and FIG.
3 shows a main circuit arrangement single-wire connection arrangement diagram showing a state in which the main circuit devices shown in FIG. 3 are dispersed and housed in the box shown in FIG. 1, and corresponds to FIG. 11 shown in the prior art.

As shown in FIG. 3, this gas insulated metal closed switchgear is a special high-voltage power receiving equipment in which power is received from two systems and stepped down by three transformers to supply power to a load. ing.

Of these, the current transformer (C
T) to the insulating bushings indicated by reference numerals 7A, B and C are housed in the No. 1 power receiving panel 6 shown in FIG. 1 including the grounding disconnector on the left side. 1 shows an insulating bushing 7A, 7B, 7C penetrating the ceiling portion of FIG.

The components from the current transformer (CT) on the right rear side in FIG. 3 to the insulating bushings indicated by reference numerals 7Q, R and S and the grounding disconnector on the right side are the No. 2 power receiving board 6 described in FIG.
3 shows the instruments stored in B.

Hereinafter, reference numerals 7D, E, F and 8D, E, F shown on the load side of the insulating bushings 7A, 7B, 7C shown on the left side of FIG. 3 denote the disconnecting switchboard 4 shown in FIG. The insulating bushing penetrated the ceiling part is shown.

In FIG. 3, reference numerals 7G...
, 9A, as shown in FIG. 4, show insulating bushings penetrating the ceiling of each box body. The description including other main circuit devices connected to each other via these insulating bushings will be omitted. Omitted.

In FIG. 4, on the ceiling of the bus bar 3, there are provided a total of five insulating bushings connected to the left and right boxes by cables, as shown in FIG. In this power receiving facility, the number of insulating bushings on the ceiling of the bus bar 3 is the largest.

Next, FIG. 5 shows the insulating bushings 7N, 7 of the VCT panel to which cables are connected on both sides, among the insulating bushings penetrating the ceiling of each box as shown in FIG.
Enlarged detailed view showing the mounting interval between each closely arranged phase, such as O, 7P, etc., wherein the insulating bushings of each group penetrating closely to the ceiling of another box are also at the same interval. It is.

That is, the insulating bushings 7N, 7O, and 7P, which form a group of the R, S, and T phases, have a mounting interval P1 between the phases, the head 7a of each of the insulating bushings 7N, 7O, and 7P.
Is slightly narrower than the maximum width W.

Therefore, the insulating bushings 7N, 7
The mounting interval P2 in the longitudinal direction of O and 7P (the horizontal direction in FIG. 5) is shorter than the length L of the head 7a of each of the insulating bushings 7N, 7O and 7P.

The head 7a has an insulating layer made of epoxy resin formed around the center conductor (not shown) embedded in the center of the inside, and both ends of the insulating layer are trapezoidal. The flange portion of the cable connection holding member 11a is tightened with a bolt to the outer surface side.

Each of the insulating bushings 7N, 7O, 7P overlaps in the left-right direction in FIG. Therefore, between the outer periphery of the cylindrical portion of the cable connection holding bracket 11a and the side surface of the head of the adjacent insulating bushing, only a tool for fastening a fixing bracket (not shown) for fixing the insulating bushing to the ceiling of the box is required. A slight gap is formed. Note that a ground layer is formed on the surface of the head 7a, and the outer surface of the head of each insulating bushing is at the ground potential similarly to the ceiling of the box.

As described above, in a gas insulated metal closed switchgear in which three phases of insulating bushings are closely attached in the longitudinal and width directions and penetrated through the ceiling, the conventional gas insulated metal closed switchgear P2 Since the depth and width of the box can be reduced as compared with the ceiling in which the insulating bushings are arranged at intervals of ≧ L, P1 ≧ W, the installation floor area of the power receiving and transforming equipment can be reduced.

In the bus bar 3 having a wide frontage shown in FIG. 1, one group of insulating bushings is provided between the four groups of insulating bushings on the left, right, front and rear sides. Cables 13A, 13B, 13C to be connected
Is arranged between the front and rear ends of the two front and rear insulation bushings and the center, so that a total of five groups of insulation bushings are arranged in the minimum space, and the disconnecting switchboards 4 adjacently arranged on the left and right sides. Cable connection between the power supply and the No. 2 transformer primary panel 2 can also be performed.

Also, the VCT from above the ceiling of the power receiving panel 6
Except for the cables 13A, 13B, and 13C, each cable disposed above the ceiling of the panel 1 can be made equal in length among the three phases of each group. And easy to assemble.

The insulating bushings 9A, 9B, 9C penetrating in the front and rear at the center of the bus bar 3 are staggered similarly to the insulating bushings 9D, 9E, 9F of the right No. 2 transformer primary panel 2. Or insulating bushings 9D, 9E,
9F is arranged on the left insulating bushing 9A, 9B, 9C.
By arranging them in a line in the center of the ceiling in the same manner as in the above, the lengths of the cables 13A, 13B, and 13C can be made uniform.

Next, FIG. 6 is an enlarged cross-sectional view taken along the line BB of the power receiving panel 6A installed at the left end of FIG. 1. Among the insulating bushes penetrating the ceiling, the insulating bushings indicated by broken lines are:
1 shows a case in which a power receiving panel is arranged in an intermediate portion of a row board in power receiving equipment having a specification different from that in FIG. 1.

In FIG. 6, a U-shaped partition 18a is provided on the upper part of the box body 18, and an insulating gas chamber is provided between the box 18 and the ceiling plate.
A load-side main circuit disconnector 15A is formed at the front end of the insulating gas chamber 18d.

The main circuit disconnector 15A has a grounding disconnector incorporated in the upper part thereof. The operating mechanism 15a of the main circuit disconnecting device 15A and the grounding disconnector are connected to the front side of the front end of the partition 18a. Operating mechanism 15b is attached.

A vacuum circuit breaker 16A penetrates the upper part of the partition 18b which is suspended from the front lower part of the partition 18a.
The operation mechanism 16 of the vacuum circuit breaker 16A
a is attached.

Below the vacuum circuit breaker 16A, a main circuit disconnector 15B on the power supply side is provided through the partition 18a. The operation mechanism 15c of the main circuit disconnector 15B and the operation mechanism 15 of the ground disconnector
d is also fixed to the lower front surface of the partition 18b.

Under the main circuit disconnector 15B, a lightning arrester 19 shown on the power supply side in FIGS. 3 and 4 is provided through the partition 18b.
The terminal at the rear end of the lightning arrester 19 is connected to the upper main circuit disconnector 15B.
Is connected to the lower pole.

A front end of a cable head 17 is air-tightly provided on an upper part of a partition 18c vertically suspended from a rear lower end of the partition 18a. The upper end of a power-supply-side cable raised from the floor is connected, and this cable passes through a through-type current transformer CT fixed to a lower rear portion of the partition 18c.

[0098] The insulating bushing 7
A, 7B and 7C are arranged in order from the front side, and the lower ends of these insulating bushings 7A, 7B and 7C are connected by conductors to the upper pole of the main circuit disconnector 15A on the load side. At the center of these insulating bushings 7A, 7B, 7C, cables 11A, 11B, 11C constituting the first bus shown in FIG. 1 are shown.

Reference numerals 12A, 12B and 12C and reference numerals 13A, 13B and 13C shown together with the insulating bushings indicated by broken lines indicate that the power receiving panel 6A is connected to the transformer panel 2A and the disconnecting switch panel 4 according to the user's specifications as described above. , Or between the bus bar 3 and the No. 2 transformer primary panel 2B.

Next, FIG. 7 is an enlarged vertical cross-sectional detailed view of the transformer primary panel 2A, and corresponds to the CC cross-sectional view of FIG. In FIG. 7, a partition is provided in front of the middle portion of the box 23.
23a is installed vertically, and a partition is provided behind the partition 23a.
23b is provided. Further, a partition 23c is provided vertically behind the partition 23b, and these partitions 23a, 23c are provided.
An insulating gas is sealed between b and 23c.

At the front end of the box 23, a front door 23d is provided, and at the rear end of the box 23, an upper door 23e and a lower door 23f are attached. At the front end between the partition 23a and the partition 23b, the cable heads 10A, 10B and 10C shown in FIGS. 1, 3 and 4 penetrate the ceiling portion of the box 23 with the cable connection side forward. Insulating bushings 8A, 8B, 8C extend through the rear of the partition 23b. Between these insulating bushings, the cables 11A, 11B and 11C shown in FIG. 1 are shown.

The partition 23a is provided with a grounding disconnector 16c extending forward and backward with respect to the upper part, and a conductor 23g connected to the lower ends of the cable heads 10A, 10B and 10C is provided at the rear end of the grounding disconnector 16c. Are connected at the lower end.

[0103] A vacuum circuit breaker 16 is provided below the grounding disconnector 16c.
B is penetrated back and forth, and the upper terminal at the rear end of the vacuum circuit breaker 16B is connected to the rear end of the ground disconnecting switch 16c. An insulating spacer 23j is vertically provided in a horizontal portion at a lower end of the partition 23b, and an upper end of the insulating spacer 23j is connected to the vacuum circuit breaker 16b.
B is connected to the lower terminal at the rear end.

At the lower end of the partition 23a, a disconnecting switch 15C is provided penetrating back and forth, and the upper terminal at the rear end of the disconnecting switch 15C is connected to the lower terminal of the insulating spacer 23j. Disconnector 15C
The lower terminal at the rear end of the insulator stands on the bottom plate of the box 23.
It is connected to lower ends of insulating bushings 8A, 8B and 8C provided behind the ceiling via conductors 23m and 23n fixed to the insulator 23b and the insulator 23b fixed to the rear of the partition 23b.

The primary transformer 2C of the No. 3 transformer shown on the right side of FIGS. 1 and 4 has exactly the same configuration. Also,
The No. 2 transformer primary panel 2B shown in the middle part of FIGS.
The arrangement of the internal equipment is the same as in FIG. 7, but the upper end of the partition 23b extends forward as shown by the dashed line, and the insulating bushing 9D shown in FIG. , 9E, and 9F are vertically installed at an interval in the front-rear direction.

Therefore, only the shape of the partition plate 23b and the position of the opening of the ceiling plate are different. In addition, 2 in FIG.
In the same manner as the left and right transformer boards, grounding disconnectors should be shown on the connection diagram also at the portions of the insulating bushings indicated by reference numerals 9D, 9E and 9F of the No. 2 transformer board for the No. 2 transformer T. Is omitted because it is complicated.

FIG. 8 is an enlarged longitudinal sectional view showing a second embodiment of the gas-insulated closed switchgear according to the present invention.
FIG. 8 is a diagram corresponding to FIG. 7 showing the case where the insulating bushing on the load side of the transformer primary panel is provided at the rear part according to the user's specification, and corresponding to FIG. 7 shown in the first embodiment.

In FIG. 8, insulating bushings 8X, 8Y, 8Z connected to adjacent box bodies are provided in the ceiling plate of the box body 24 in front of the intermediate portion. Cable heads 10X, 10Y and 10Z connected to the transformers are provided so as to face the cable connection side rearward.

[0109] Between the front and rear insulating bushings,
Cables connecting devices inside the box adjacent to both sides of 24
11X, 11Y and 11Z are shown. A U-shaped partition 24a is vertically provided below the left insulating bushings 8X, 8Y, 8Z.
A disconnector 15D extends through in the front-rear direction.

The partition 24b is provided vertically between the bottom plate of the partition 24a and the bottom plate of the box 24. A vacuum circuit breaker 16C is attached to the partition 24b.
A ground disconnecting switch 16c is mounted below C.

The insulating spacer 24k is provided on the bottom plate of the partition 24a.
The insulating spacer 24k has an upper end connected to the disconnector 15.
D is connected to the lower end of the rear part, and the lower end of the insulating spacer 24k is connected to the upper end of the rear part of the vacuum circuit breaker 16C.

The lower terminal at the rear of the vacuum circuit breaker 16C is connected to the rear end of the ground disconnecting switch 16c via a conductor 24f.
g, 24h, and 24j are connected to the lower end of a cable head 10X (Y, Z) penetrating the rear end of the ceiling plate.

The lower ends of the insulating bushings 8X, 8Y, 8Z penetrating the front of the ceiling plate are connected to the rear upper end of the disconnector 15D. A front door 24c is shown at the front end of the box 24, and a partition 24e and a rear door 24d are shown at the rear end of the box 24.

Between and between the partition 24b and the partition 24e
An insulating gas is sealed in the inside of 24a. With this configuration, it is possible to cope with the case where the step-down transformer is installed behind the box.

Next, FIG. 9 is a plan view showing a third embodiment of the gas insulated metal closed switchgear according to the present invention, corresponding to claims 5 and 6, and FIG. FIG. 4 is an enlarged detail view of a cross section D.

In FIGS. 9 and 10, the power receiving system is 2CB-1VCT-2CB as in FIG. 9 shown in the prior art.
Or show the case of 2CB-1VCT-2DS power receiving equipment, for both sides of the VCT panel 1A installed in the center,
Transformer primary panels 5A and 5B are provided adjacent to each other, and power receiving panels 6A and 6B are installed on both sides of these.

As shown in FIGS. 9 and 10, VCT board 1A
Cables 11R, 11S as the first bus,
11T is provided and connected to each of the insulating bushings 7R, 7S, 7T.

The insulating bushings 7R, 7S, 7
An insulation bushing 8R to which the second bus cable 12R is connected extends through the front of T, and an insulation bushing 8T to which the second bus cable 12T is connected to the rear end as described below. The S-phase insulated bushing and the cable as the second bus are omitted in common with the S-phase of the first bus.

The lower ends of the insulating bushings 7R and 8R are connected to the VCT U-phase current transformer 20A, and the lower ends of the insulating bushings 7T and 8T are connected to the VCT W-phase current transformer 20B. The lower end of the insulating bushing 7S is connected to the power supply side of the instrument transformer 21.

In the gas insulated metal closed switchgear thus configured, the width of the insulation bushings of each group in the width direction is compared with the maximum width of the head of each insulation bushing as shown in FIG. Slightly narrower and the second
By omitting the S phase as the bus and sharing it with the S phase of the first bus, the cable connection work can be reduced,
The amount of work for installation work at the installation site can be reduced.

[0121]

As described above, according to the invention corresponding to claim 1, the side surface of the trapezoidal portion on one side of the first insulating bushing and the second
The side of the trapezoid on the other side of the insulating bushing is made adjacent, and the side of the trapezoid on one side of the second insulating bushing and the side of the trapezoid on the other side of the third insulating bushing are made adjacent to each other.
Since the area occupied by the insulating bushing on the outer wall and ceiling of the box is reduced, it is possible to obtain a gas-insulated metal-closed switchgear that can reduce the depth of the box and exhibit the characteristics of gas insulation.

According to the invention corresponding to claim 2,
A first insulated bushing group connected to the load side of the first power receiving panel and one side of the first power receiving side bus bar connecting / disconnecting device is provided in front of one side of the ceiling portion of the box, and the second power receiving panel A second group of insulating bushings connected to the load side and one side of the second bus bar connecting / disconnecting device is provided in front of the other side of the ceiling of the box body, and the load side of the first power receiving panel and the first load are connected to each other. A third group of insulating bushings connected to one side of the side bus connection disconnector is pierced behind the other side of the ceiling of the box, and one side is connected to the instrument transformer and the other side is connected to the second load side bus connection. The fourth insulating bushing group connected to the other side of the disconnector is provided in front of the other side of the ceiling of the box so as to reduce the area occupied by the insulating bushing on the ceiling of the box. It is possible to obtain a gas-insulated metal-closed switchgear that can reduce the depth of the body and exhibit the features of gas insulation.

According to the third aspect of the present invention,
The side surface of the trapezoid on one side of the first-phase insulating bushing of the first, second, third and fourth insulating bushing groups and the trapezoidal portion on the other side of the second-layer insulating bushing are adjacent to each other. Since the side of the trapezoid on one side of the insulating bushing and the side of the trapezoid on the other side of the third phase insulating bushing are adjacent to each other, the area occupied by the insulating bushing on the ceiling of the box is reduced. A gas-insulated metal-closed switchgear that can reduce the depth and exhibit the features of gas insulation can be obtained.

Further, according to the invention corresponding to claim 4,
A second phase insulating bushing of the fifth insulating bushing group is provided between a third phase of the second insulating bushing group and a first phase of the fourth insulating bushing group, and a first phase of the fifth insulating bushing group is provided.
A phase insulating bushing is provided on one side of an intermediate portion of the first phase of the first and second insulating bushing groups, and a third phase of the fifth insulating bushing group is a third phase of the third and fourth insulating bushing groups. By providing the switch on the other side, the area occupied by the insulating bushing on the ceiling of the box is reduced, so that a gas-insulated metal closed switchgear that can reduce the depth of the box and exhibit the characteristics of gas insulation is obtained. be able to.

According to the invention corresponding to claim 5,
A first gas insulating chamber is provided below the first and second vertical partitions by the first, second, and third vertical partitions that partition the box body back and forth, and the horizontal partition that vertically separates these vertical partitions. Forming a second gas-insulated chamber above the first and second partitions, and forming a third gas-insulated chamber below the second and third vertical partitions; A fourth gas insulating chamber is formed above the vertical partition, a first power receiving side bus connecting / disconnecting device is housed in the first gas insulating chamber, and a second power receiving side bus connecting / disconnecting is installed in the second gas insulating chamber. By storing the first load-side bus connection disconnector in the third gas insulation chamber and the second load-side bus connection disconnector in the fourth gas insulation chamber, the insulation bushing is reduced. Gas insulated metal that can reduce the depth of the box and exhibit the gas insulation characteristics because the area occupied by the outer wall and ceiling of the box has been reduced. It is possible to obtain a closed type switch gear.

Further, according to the invention corresponding to claim 6, the first and second phases of the fourth insulating bushing group are changed to the third phase.
The second phase of the fourth insulating bushing group is shared with the second phase of the third insulating bushing group, and the second phase of the fifth and sixth insulating bushing groups is the first phase. ,
By connecting to the second phase of the second insulating bushing group, the area occupied by the insulating bushing on the ceiling of the box is reduced, so that the gas that can reduce the depth of the box and exhibit the characteristics of gas insulation. An insulated metal closed switchgear can be obtained.

Further, according to the invention corresponding to claim 8,
An upper insulating gas chamber provided at the top of the box and having a load-side disconnector penetrating at the front end thereof, and a power receiver formed below the upper insulating gas chamber and having an upper electrode connected to a lower electrode of the load-side disconnector. Insulating gas through which a vacuum circuit breaker is penetrated at the top of the front end, and a power-supply-side disconnector through which the upper electrode is connected to the lower electrode of the vacuum circuit breaker for power reception is provided below the vacuum circuit breaker for power reception. Chamber, and an insulating bushing penetrating the ceiling of the upper insulating gas chamber, the lower end of which is connected to the upper pole of the load-side disconnector and the upper part of which is connected to a box juxtaposed to the box. Since the area occupied by the bushing on the ceiling of the box is reduced, it is possible to obtain a gas-insulated metal-closed switchgear that can reduce the depth of the box and exhibit the characteristics of gas insulation.

Further, according to the invention corresponding to claim 9,
A gas-insulated circuit breaker chamber in which a cable head formed in the middle of the box and connected to a load-side transformer penetrates the ceiling and a load-side vacuum circuit breaker extends through the front end; A disconnector formed at the rear and lower part of the chamber and having an upper pole connected to the lower pole of the load-side vacuum circuit breaker was provided at the front end, and the lower pole of the disconnector was connected to the lower end and arranged side by side with the box. By providing an insulating bushing whose upper part is connected to the box body and a gas-insulated disconnector room penetrating the ceiling, the area occupied by the insulating bushing on the ceiling part of the box body is reduced. Thus, it is possible to obtain a gas-insulated metal-closed switchgear which can reduce the power consumption and exhibit the characteristics of gas insulation.

Further, in the gas insulated metal closed switchgear according to the tenth aspect of the present invention, an insulating bushing extends through the ceiling, and a disconnector having an upper pole connected to the lower end of the insulating bushing extends through the front end. A disconnector chamber filled with insulating gas and a load-side vacuum circuit breaker formed at the lower and rear portions of the disconnector chamber and connected to the lower pole of the disconnector and having an upper pole connected to the front end thereof. A circuit breaker room in which the lower end is connected to the lower pole of the circuit breaker and the upper side is connected to the transformer on the load side is provided in the ceiling and a circuit breaker room filled with insulating gas is provided. Since the occupation area occupied by the ceiling portion is reduced, it is possible to obtain a gas-insulated metal closed switchgear which can reduce the depth of the box and exhibit the characteristics of gas insulation.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of a gas-insulated metal closed switchgear of the present invention.

FIG. 2 is an enlarged detailed view taken along the line AA of FIG.

FIG. 3 is a main circuit single line connection diagram showing a first embodiment of the gas insulated metal closed switchgear of the present invention.

FIG. 4 is a main circuit single line connection layout diagram showing a first embodiment of the gas insulated metal closed switchgear of the present invention.

FIG. 5 is a partially enlarged detailed view of FIG. 1;

FIG. 6 is an enlarged detailed view taken along the line BB of FIG. 1;

FIG. 7 is an enlarged detailed sectional view taken along the line CC of FIG. 1;

FIG. 8 is an enlarged vertical cross-sectional detail view showing a second embodiment of the gas insulated metal closed switchgear of the present invention.

FIG. 9 is a plan view showing a third embodiment of the gas-insulated metal closed switchgear of the present invention.

10 is an enlarged detailed cross-sectional view taken along the line CC of FIG. 9;

FIG. 11 is a main circuit single line connection layout diagram showing an example of a conventional gas insulated metal closed switchgear.

FIG. 12 is a plan view showing an example of a conventional gas insulated metal closed switchgear.

FIG. 13 is an enlarged detailed sectional view taken along the line DD of FIG. 10;

[Explanation of symbols]

1 ... Transformer for instrument (VCT) panel, 2A ... Primary board of No.1 transformer, 2B ... Primary board of No.2 transformer, 2C ... Primary board of No.3 transformer, 3 ... Bus connection board, 4 ... Disconnector board, 5A: No. 1 transformer primary panel, 6A, 6B: Power receiving panel, 7A, 7B, 7C, 7
D, 7E, 7F, 7G, 7H, 7J, 7K, 7L, 7
M, 7N, 7O, 7P, 7R, 7S, 7T, 8A, 8
B, 8C, 8D, 8E, 8F, 8G, 8H, 8J, 8
K, 8L, 8M, 8N, 80, 8P, 8R, 8T, 8
X, 8Y, 8Z, 9A, 9B, 9C, 9D, 9E, 9F
... Insulating bushings, 10A, 10B, 10C, 10D, 10E, 10
F, 10R, 10S, 10T, 10U, 10V, 10W, 10X, 10
Y, 10Z, 17 ... cable head, 11A, 11B, 11C, 11
D, 11E, 11F, 12A, 12B, 12C, 12D, 12E, 12
F, 12G, 12H, 12J, 13A, 13B, 13C ... cable,
14A, 14B, 15A, 15B, 15C, 15D ... disconnector, 16A,
16B, 16C: vacuum circuit breaker, 18, 22, 23, 24 ... box, 19 ...
Lightning arrester, 20A, 20B ... current transformer, 21 ... transformer for V-phase instrument.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kazuhito Horikiri, 1 Toshiba-cho, Fuchu-shi, Tokyo, Japan Inside the Fuchu Plant, Toshiba Corporation (72) Inventor Osamu Sakaguchi 1, 1-Toshiba-cho, Fuchu-shi, Tokyo, Japan 72) Inventor Tomio Go Go 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Fuchu Plant, Toshiba Corporation (72) Inventor Ryoichi Kodama 1-go Toshiba-cho, Fuchu-shi, Tokyo Inside the Fuchu Plant Toshiba Corporation (72) Inventor Junichi Ikeda Tokyo No. 1, Toshiba-cho, Fuchu City Inside the Fuchu Plant, Toshiba Corporation (72) Inventor Takeshi Hiramoto No. 1, Toshiba Town, Fuchu City, Tokyo, Japan Inside the Fuchu Plant, Toshiba Corporation (72) Inventor Nobuo Masaki 1-1-1, Shibaura, Minato-ku, Tokyo No. 1 Toshiba Corporation head office

Claims (10)

[Claims] 1. A gas insulated metal closed switch in which a plurality of insulating bushes are connected in parallel to at least one side of a trapezoid formed on both sides of a head and adjacent to an outer wall of a box. In the gear, the side of the trapezoid on one side of the first insulating bushing and the side of the trapezoid on the other side of the second insulating bushing are adjacent to each other, and the side of the trapezoid on one side of the second insulating bushing is 3. A gas-insulated metal-closed switchgear, wherein a side surface of the trapezoidal portion on the other side of the insulating bushing of No. 3 is adjacent. 2. A first power receiving panel for receiving power of a first system and a second power receiving panel for receiving power of a second system, one of which is connected to a load side and a first of which is connected to the other side. A second power receiving side bus connecting / disconnecting device, a first load side bus connecting / disconnecting device having one side connected to the load side of the first power receiving panel, and a measuring instrument on the load side of the second power receiving panel. A bus in which one side is connected via a transformer and the other side is housed in a box with a load side of the first load side bus disconnector and a second load side bus connecting disconnector connected to the load side transformer. In a gas insulated metal closed switchgear for communication, a first insulating bushing group connected to a load side of the first power receiving panel and one side of the first power receiving side bus connecting disconnector is connected to a ceiling of the box body. Part, and is connected to the load side of the second power receiving panel and one side of the second busbar connecting disconnector. A second group of insulating bushings is provided in front of the other side of the ceiling of the box body, and is connected to the load side of the first power receiving panel and one side of the first load-side bus connecting disconnector. An insulation bushing group of No. 3 is penetrated behind the other side of the ceiling of the box body, and one side is connected to the instrument transformer, and the other side is connected to the other side of the second load side bus connection disconnector. A gas insulated metal closed switchgear, wherein a fourth group of insulating bushings is provided in front of the other side of the ceiling of the box body. 3. A side face of a trapezoid on one side of the first phase insulating bushing of the first, second, third and fourth insulating bushing groups and a trapezoidal section on the other side of the second phase insulating bushing. 3. The gas insulated metal closed type switch according to claim 2, wherein the side surface of the trapezoid on one side of the second phase insulating bushing is adjacent to the side surface of the trapezoid on the other side of the third phase insulating bushing. gear. 4. A second phase insulating bushing of the fifth insulating bushing group is provided between a third phase of the second insulating bushing group and a first phase of the fourth insulating bushing group. A first-phase insulating bushing of the fifth insulating bushing group is provided on one side of an intermediate portion of the first phase of the first and second insulating bushing groups, and a third phase of the fifth insulating bushing group is connected to the third phase. 4. The gas insulated metal closed switchgear according to claim 2, wherein said switchgear is provided on the other side of the third phase of the fourth insulating bushing group. 5. A lower part of the first and second vertical partitions by first, second, and third vertical partitions that partition the box body back and forth and a horizontal partition that vertically separates these vertical partitions. First
Forming a second gas insulating chamber above the first and second partitions, and forming a third gas insulating chamber below the second and third vertical partitions. , The second and third
Forming a fourth gas insulating chamber above the vertical partition, housing the first power receiving side bus connecting disconnector in the first gas insulating chamber, and storing the second gas insulating chamber in the second gas insulating chamber. A power receiving side bus connection disconnector is housed, the first load side bus connection disconnector is housed in the third gas insulation chamber, and the second load side bus connection disconnector is housed in the fourth gas insulation chamber. 5. The gas insulated metal closed switchgear according to claim 2, wherein the switchgear is accommodated. 6. A first power receiving panel, which receives a power of a first system and has a first group of insulating bushings connected to a load side penetrating a ceiling portion of a box, and a power of a second system. And a second group of insulating bushings connected to the load side, and a second power receiving panel penetrating the ceiling, and a power supply to the load side adjacent to the first and second power receiving panels on opposite sides. The first and second transformer primary panels and a third insulating bushing group disposed adjacent to the first and second transformer primary panels and penetrating the ceiling of the box body. A ceiling part of the first and second transformer primary panels via an instrument transformer connected to the first and second insulation bushing groups and housed therein and a fourth insulation bushing group penetrating the ceiling part; A gas-insulated metal switchgear comprising a VCT panel connected to fifth and sixth groups of insulating bushings penetrating through the gasket. A first phase and a second phase of the fourth insulating bushing group are provided before and after the third insulating bushing group, and a second phase of the fourth insulating bushing group is provided with a second phase of the third insulating bushing group. A gas insulated metal closed type switchgear, wherein a second phase of the fifth and sixth insulating bushings is connected to a second phase of the first and second insulating bushings. 7. A side surface of the trapezoidal portion on one side of the first phase of the first, second, and third insulating bushing groups is adjacent to a side surface of the trapezoidal portion on the other side of the second phase. 7. The gas insulated metal closed switchgear according to claim 6, wherein a side surface of the trapezoid on one side of a phase is adjacent to a side surface of the trapezoid on the other side of the third phase. 8. An upper insulating gas chamber provided at an upper portion of a box body and having a load-side disconnector penetrating at a front end thereof, and an upper electrode formed below the upper insulating gas chamber and below the load-side disconnector. A power-receiving vacuum circuit breaker connected to the pole is provided at the upper end of the front end, and a power-supply-side disconnector to which an upper electrode is connected to a lower pole of the power-receiving vacuum circuit breaker extends below the power-receiving vacuum circuit breaker. A lower insulating gas chamber provided, and a lower end connected to the upper pole of the load-side disconnector penetrating through a ceiling portion of the upper insulating gas chamber and an upper part connected to a box juxtaposed to the box. A gas-insulated metal-closed switchgear for receiving power provided with an insulating bushing. 9. A gas insulated circuit breaker chamber having a cable head formed in an intermediate portion of a box body and connected to a transformer on a load side penetrating a ceiling portion and a vacuum circuit breaker on a load side penetrating at a front end. A disconnector formed at the rear and lower portions of the gas-insulated circuit breaker chamber and having an upper electrode connected to a lower electrode of the load-side vacuum circuit breaker is provided at a front end, and a lower electrode of the disconnector is connected to a lower end thereof. A gas insulated metal switchgear comprising a gas insulated disconnector chamber in which an insulating bushing connected to an upper part of a box arranged side by side with a box penetrates a ceiling portion. 10. A disconnector chamber in which an insulating bushing is provided through the ceiling, an upper electrode is connected to a lower end of the insulating bushing, and a disconnector is provided at a front end of the disconnecting bush and filled with insulating gas. A load-side vacuum circuit breaker formed at a lower portion and a rear portion and having an upper electrode connected to a lower electrode of the disconnector is provided at a front end thereof. A gas-insulated metal-closed switchgear comprising: a circuit breaker chamber in which a cable head connected to a switch penetrates a ceiling and is filled with an insulating gas.