KR980012755A - Gas Insulated Metal Closed Switchgear - Google Patents

Abstract

The gas insulated metal closed switchgear includes a housing accommodating a plurality of circuits, at least three first insulating bushings penetrating the outer wall of the housing, at least three second insulating bushings penetrating the outer wall of the housing; At least three cables connecting the first insulating bushing and the second insulating bushing to each other and adjacent to the outer wall of the housing. The first and second insulated bushings each have a head having trapezoidal portions formed on both sides thereof, and are connected to one cable on at least one side of the trapezoidal portion, respectively, for connecting the circuit arrangement. Side surfaces of the first side of the trapezoidal portion of the first phase insulating bushing of the first and second insulating bushings are respectively provided adjacent to side surfaces of the second side of the second phase insulating bushing of the first and second insulating bushings. Sides of the first side of the trapezoidal portion of the first and second insulated bushings of the first and second insulated bushings are respectively adjacent to sides of the first side of the trapezoidal portion of the third phase of the insulated bushings, respectively. Is installed.

Description

Gas Insulated Metal Closed Switchgear

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

An example of a conventional gas insulated metal closed switchgear is shown in a circuit break connection arrangement diagram of FIG. 12 is a plan view of a conventional gas insulated metal closed switchgear shown in FIG.

The gas insulated metal closed switchgear shown in FIGS. 11 and 12 is a two-circuit power receiving facility of a so-called primary 2CB-1VCT-2nd 2CB system. The entrance of the power receiving side is made from the bottom of the housing, and the connection between the power receiving sides and the load side is made on the ceiling of the housing.

11 and 12, both sides of the composite voltage and current converter panel (hereinafter referred to as VCT panel) 51 mounted at the center and including the composite voltage and current converter (hereinafter referred to as VCT) are respectively attached to the cable. Thus, the first transformer main panel 50A and the second transformer main panel 50B connected to the load side of the VCT panel 51 are symmetrically provided.

Outside the first and second transformer main panels 50A and 50B, the first power receiving panel 49A and the first power receiving panel 49A connected to the power supply side of the VCT panel 51 are connected to the power supply side of the other power supply device. Second power receiving panel 49B is provided symmetrically.

The cable connected to the lead wire of the power receiving equipment in which this gas insulated metal closed switchgear was provided is connected to the lower end of the cable head 32A in which the left end was accommodated in the lower end of the rear part of the 1st power receiving panel. The current converter 31A is attached to this cable.

At the upper end of the cable head 32A, the piezoelectric element 33A, the voltage detector 34A, the ground switch 35A and the primary disconnection switch 36A are housed in this order on the cable head 32A. The power supply side of the primary disconnect switch 36A is connected to the cable head 32A, and the load side of the primary disconnect switch 36A is connected to the power house of the vacuum circuit breaker 37A.

The load side of the vacuum circuit breaker 37A is connected to the lower end of the insulating bushing 46A for the connecting connection passing through the ceiling of the housing of the first power receiving panel 49A via the secondary disconnect switch 38A.

Similarly, the cable connected to the lead line of the power receiving equipment and other systems in which the gas insulated metal closed switchgear is installed, the right end is connected to the lower end of the cable head 32B housed in the lower rear end of the second power receiving panel 49B. And a current converter 31B is attached to this cable.

At the upper end of the cable head 32B, the piezoelectric element 33B, the voltage detector 34B, the ground switch 35B, and the primary disconnection switch 36B are housed in the upper portion of the cable head 32B in this order. The power supply side of the primary disconnect switch 36B is connected to the cable head 34A, and the load side of the primary disconnect switch 36B is connected to the power supply side of the vacuum circuit breaker 37B.

The load side of the vacuum circuit breaker 37B passes through the secondary disconnect switch 38B and insulates the bushing for external connection through the ceiling of the housing of the ground switch 39 for bus ground and the second power receiving panel 49B. It is connected to the lower end of 46B.

Next, the current converter 45A is connected to a cable connected to a first transformer (not shown). This cable is connected to a cable head 44A provided through an upper end of the first transformer primary panel 50A. The lower end of the cable head 44A is connected to the power supply side of the ground 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 passes through the disconnect switch 41A provided at the lower part of the vacuum circuit breaker 42A, onto the rear portion of the first transformer primary panel 50A, and the ceiling It is connected to the lower end of the insulation bushing 46C for external connection which penetrates the rear part vertically.

Similarly, the current converter 45B is connected to a cable connected to a second transformer (not shown). This cable is connected to the cable head 44B provided through the upper end of the 2nd transformer primary panel 50B. The lower end of the cable head 44B is connected to the power supply side of the ground switch 43B and the load side of the vacuum circuit breaker 42B.

The conductor connected to the power supply side of the vacuum circuit breaker 42B rises on the rear part of the second transformer primary panel 50B via the disconnect switch 41B provided under the vacuum circuit breaker 42B, and the rear part of the ceiling. Is connected to the lower end of the insulating bushing 46D for external connection.

In addition, the upper end of the conductor connected to the power supply terminal of the VCT 40 is connected to the VCT panel 51 at the lower end of the insulation bushing 46B which vertically penetrates slightly ahead of the center of the ceiling of the VCT panel 51. The upper end of the conductor connected to the load side of the VCT 40 is connected to the lower end of the insulation bushing 46E that vertically penetrates slightly behind the center of the ceiling of the VCT panel 51.

The R-phase CV cables (hereinafter simply referred to as cables) 47a and 47a ', the S-phase cables 47b and 47b', and the T-phase cables 47c and 47c 'vertically penetrate the ceiling of the first power receiving panel. Top of the insulating bushing 46A, the top of the insulating bushing 46E vertically penetrating the ceiling of the VCT panel 51, the top of the insulating bushing 46B vertically penetrating the center of the second power receiving panel 49B. It is installed to connect them in between. These cables 47a, 47a ', 47b, 47b', 47c, 47c 'constitute a primary side bus, that is, the first bus 47.

R-phase CV cables 48a, 48a ', S-phase cables 48b, 48b', and T-phase cables 48c, 48c 'are insulated bushings vertically penetrating the ceiling of the first transformer primary panel 50A. Top of 46C. Installed to connect them between the upper end of the insulating bushing 46F vertically penetrating the ceiling of the VCT panel 51 and the upper end of the insulating bushing 46D penetrating the ceiling of the second transformer primary panel 50B, respectively. It is. These cables 48a, 48a ', 48b, 48b', 48c, 48c 'constitute a secondary side bus, ie a second bus 48.

In addition, the upper ends of the primary bus 47, the secondary bus 48, and all the insulating bushings may include the first power receiving panel 49A, the first transformer primary panel 50A, the VCT panel 51, and the second transformer 1. It is covered with a cable duct (not shown) placed on the vehicle panel 50B and the second power receiving panel 49B.

FIG. 13 is an enlarged vertical cross-sectional detail view of the first and second power receiving panels 49A and 49B shown in FIGS. 11 and 12 seen from the right side.

In Fig. 13, the housing 52 includes an approximately U-shaped cross-section divider 52a that divides the center, the whole, and the rear portion, an L-flat cross-sectional divider 52b between the front center and the top plate of the divider 52b, The U-shaped cross-section divider 52c in front of the divider 52a is provided. The inside of these dividers 52a, 52b, 52c is filled with hexafluoride sulfuric acid gas.

The vacuum circuit breaker 37A or 37B shown in FIG. 11 is housed inside the partition 52c. The upper electrode of the vacuum circuit breaker 37A or 37B is connected to the front end of the upper spacer laterally penetrating the upper part of the front side of the partition 52a. The lower electrode of the vacuum circuit breaker 37A or 37B is connected to the front end of the lower spacer laterally penetrating the divider 52a on the lower side of the upper spacer.

In the lower part of the vacuum circuit breaker 37A or 37B, the operation mechanism part 37a of the vacuum circuit breaker 37A or 37B is accommodated below the partition 52c.

The breaker of the primary disconnect switch 36A or 36B is being fixed to the rear side of the partition 52a in the lower part of the front side of the partition 52a. The upper electrode of this primary disconnect switch 36A or 36B is connected to the rear end of the lower spacer.

Under the primary disconnect switch 36A or 36B, a breaker of the ground switch 35A or 35B is assembled. The operation mechanism part 35a of this ground switch 36A or 36B protrudes and is provided in the lower front end of the partition 52c.

Primary disconnect switch 36A or 36B, its operating mechanism part 36a (not shown), grounding switch 35A or 35B, and its operating mechanism part 35a are connected by an operating rod and a bevel gear as indicated by the dashed-dotted line. It is.

The lower electrode of the primary disconnect switch 36A or 36B is laterally in front of the rear end of the divider 52a via the upper end of the cable head 32A or 32B which vertically penetrates the rear portion of the divider 52a. It is connected to the front end of the fixed voltage detector 34A. The front end of this voltage detector 34A or 34B is connected to the upper end of the piezoelectric element 33A or 33B which vertically penetrated the divider 52a at the rear side of the cable head 32A or 32B.

The breaker of the secondary disconnect switch 38A or 38B is being fixed to the bottom face of the partition 52b. The front end of this secondary disconnect switch 38A or 38B is connected to the rear end of the upper spacer. In front of the division material 52c, the operation mechanism part 38a of the secondary disconnect switch 38A or 38B protrudes slightly upward of the center part, and is provided.

The operation rod and the operation mechanism part 30 etc. which are shown by the dashed-dotted line rise on the side surface of the housing 52, and penetrate the upper front part of the partition 52a closely to the back, and go below the side surface. And it is connected to the shaft in the center of the fixed base of secondary disconnect switch 38A, 38B.

In the second power receiving panel 49B only, the ground switch 39 indicated by a dashed-dotted line is assembled behind the secondary disconnect switch 38B. The operation mechanism portion of the ground switch 39 is mounted in parallel with the side surface of the operation mechanism portion 38a.

On the ceiling plate above the secondary disconnect switch (38A or 38B). The insulating bushings 46A or 46B (three of which are shown in Fig. 13) are provided in close contact with the mounting base. The lower end of this insulating bushing 46A or 46B is connected to the rear end of the secondary disconnect switch 38A or 38B (only one of which is shown in FIG. 13). The R-phase cable 47a or 47a ', the S-phase cable 47b or 47b', and the T-phase cable 47c or 47c 'of the first bus shown in Fig. 12 are connected to the upper ends of the insulation bushings 46A or 46B, respectively. It is.

Here, cross sections in the longitudinal direction of the first and second transformer primary panels 50A and 50B and the VCT panel 51 are omitted.

The depth of the housing of the gas insulated metal closed switchgear of the above structure is limited by the number and width of the insulating bushings vertically penetrating the ceiling of the housing.

The reason is the first and second transformers 1 at the rear of the insulating bushings 46A and 46B vertically penetrating the ceiling of the housings of the first and second power receiving panels 49A and 49B shown in FIG. This is because it is necessary to secure a space in order to mount three phases of the insulation bushings 46C and 46D of the cable connecting the vehicle panels 50A and 50B to the VCT panel. The arrangement of the primary circuit arrangement, including the mounting units of the first and second transformer primary panels 50A, 50B and the insulation bushings of the VCT panel 51, should be determined under these conditions.

Thus, on the first and second transformer primary panels 50A and 50B, the cable head 44A connected to the load side is provided in front as shown in FIG. Further, the cable heads 44A and 44B are mounted in the orthogonal direction to the rear side insulation bushings 46C and 46D, respectively, so that the width in the transverse direction is reduced. But. This method is not applicable to newly developed vacuum circuit breakers and disconnect switches.

In particular, as shown in Figs. 11 and 12, when the VCT panel 51 is not assembled at the center portion, but is installed at the left end or the right end, or when the load is three banks at the request of the user, Fig. 12 In the transverse direction the cables arranged in 6 lines are increased to 9 lines. As a result, the depth of the housing increases, which undermines the tendency of miniaturization of gas insulated metal closed switchgear.

It is therefore an object of the present invention to provide a gas insulated metal closed switchgear which can reduce the depth of the housing and exhibit the characteristics of gas insulation well.

1 is a plan view showing a gas insulated metal closed switchgear according to a first embodiment of the present invention;

FIG. 2 is an enlarged plan view along the line A-A of FIG. 1;

3 is a main circuit disconnection connection diagram of a gas insulated metal closed switch gear according to a first embodiment of the present invention shown in FIG.

4 is a main circuit disconnection connection arrangement diagram of the gas insulated metal closed switch gear according to the first embodiment of the present invention shown in FIG.

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

6 is an enlarged detailed view taken along line B-B of FIG. 1;

7 is an enlarged cross-sectional view taken along line C-C in FIG. 1;

8 is an enlarged cross-sectional view of a gas insulated metal closed switchgear according to a second embodiment of the present invention;

9 is a plan view showing a gas insulated metal closed switchgear according to a third embodiment of the present invention;

10 is an enlarged cross-sectional view taken along the line D-D of FIG.

11 is a disconnected connection arrangement diagram of a coin of an example of a conventional gas insulated metal closed switchgear;

12 is a plan view of the gas insulated metal closed switchgear shown in FIG.

FIG. 13 is an enlarged cross-sectional view taken along the line D-D of FIG. 12;

* Explanation of symbols for main divisions in the drawings *

1: VCT panel 2A-2C: transformer primary panel

3: bus communication panel 4: disconnect switch panel

5A, 5B: primary transformer primary panel 6A. 6B: Faucet Panel

7A-9F: Insulation bushing 10A-10Z, 17: Cable head

11A-l3C: Cable 14A-l5B: Disconnect Switch

16: Vacuum Breaker 18, 22, 23, 24 Housing

19 PIEC 20A, 20B; current transducer

This object and another object of the present invention are a housing for housing a plurality of circuit equipment, at least three first insulating bushings penetrating the outer wall of the housing, and at least three second insulating bushings penetrating the outer wall of the housing. Providing a gas insulated metal closed switchgear comprising at least three cables each connecting one of the first insulating bushings to one of the second insulating bushings, the at least three cables being disposed in parallel to each other adjacent to an outer wall of the housing. Can be achieved. The first and second insulated bushings each include a head having trapezoidal portions formed on both sides thereof and connected at least one to each of the cables for connection with the circuit arrangement. Side surfaces of the first side of the trapezoidal portion of the first phase insulating bushing among the first and second insulating bushings are set adjacent to side surfaces of the second side of the first phase insulating bushing among the first and second insulating bushings, respectively. Side surfaces of the first side of the trapezoidal portion of the second phase insulated bushing among the first and second insulated bushings are respectively adjacent to side surfaces of the first side of the trapezoidal portion of the third phase insulated bushing among the first and second insulated bushings. Is set.

According to one aspect of the present invention, there is provided a first power receiving panel supplied with a first power supply from a first power supply system, a second power receiving panel supplied with a second power supply from a second power supply system, a first power receiving side bus communication disconnect switch; A gas insulated metal closed type comprising a bus communication panel accommodating a second power receiving side bus communication disconnect switch and a first load side bus communication disconnect switch and a second load side bus communication disconnect switch, and a housing accommodating a VCT panel containing a VCT. Switchgear is provided. A first side of the first receiving side bus communication disconnect switch is connected to a load side of the first receiving panel, and a first side of the second receiving side bus communication disconnect switch is connected to a load side of the second receiving panel; A second side of the first receiving side bus communication disconnect switch is connected to a second side of the second receiving side bus communication disconnect switch, and a first side of the first load side bus communication disconnect switch is connected to a load side of the first receiving panel; A first side of the second load side bus communication disconnect switch is connected to a load side of the second power receiving panel through a VCT panel and is connected to a second load side transformer, the first load side The second side of the bus communication disconnect switch is adapted to be connected to the second side of the second load side bus communication disconnect switch and to be connected to a third load side transformer. The gas insulated metal closed switchgear penetrates through the front side of the ceiling of the housing from the first side to connect the load side of the first power receiving panel and the first side of the first power receiving bus disconnect switch. A first insulating bushing group; A second insulating bushing group penetrating the front side of the ceiling of the housing at a second side to connect the load side of the second receiving panel and the first side of the second receiving side bus communication disconnect switch; A third insulating bushing penetrating the rear side of the ceiling of the housing at a first side to connect the load side of the first receiving panel and the first side of the first load side bus communication disconnect switch and the first load side transformer; And a fourth insulating bushing group penetrating the rear side of the ceiling of the housing at a second side to connect the first side of the VCT and the second load side bus communication disconnect switch and the second load side transformer; ; And a fifth insulating bushing group penetrating the ceiling of the housing to connect the second side of the first and second load side bus communication disconnect switches and the third load side transformer.

According to another aspect of the present invention, there is provided an apparatus, comprising: a first power receiving panel in which a first insulation bushing group is connected to a load side through a housing ceiling and receives first power from a first power system; A second power receiving panel through which the second insulation bushing group penetrates the ceiling of the housing and receives the second power from the second power system and connects with the load side; Located between the first and second faucet panels. A third gas insulated bushing group penetrates through the housing and is provided with a gas insulated metal closed switchgear comprising a VCT panel for receiving a VCT. The third insulating bushing group is connected to the first and second insulating bushings by a cable. A gas insulated metal closed switchgear is positioned between the first power receiving panel and the VCT panel, and a fifth group of insulating bushings penetrates the ceiling of the housing. A first transformer primary panel for supplying power to the load side; And a second transformer primary panel positioned between the second power receiving panel and the VCT whyn, penetrating the ceiling of the sixth insulating bushing group housing, and supplying power to the load side. The fourth insulation bushing group is connected to the VCT panel and to the fifth and sixth insulation bushings. The first phase insulation bushing of the fourth insulation bushing group is located at the front side of the third insulation bushing group, and the third phase insulation bushing of the fourth insulation bushing group is located at the rear side of the third insulation bushing group, and the fifth insulation The second phase insulation bushing of the bushing group is connected with the second phase insulation bushing of the first insulation bushing group, and the second phase insulation bushing of the sixth insulation bushing group is the second phase insulation bushing of the second insulation bushing group. In connection with, the second phase insulation bushing of the third insulation bushing group is commonly used as the second phase insulation floatation of the fourth insulation bushing group.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the drawings, the same reference numerals are used for the same or equivalent parts.

1 corresponds to FIG. 12 shown in accordance with the prior art; A plan view showing a gas insulated metal closed switchgear according to the first embodiment of the present invention.

3 is a disconnection connection diagram of the main circuit of the switchgear shown in FIG. Fig. 4 is a disconnected connection arrangement diagram showing the state of the main circuit equipment shown in Fig. 3, individually housed in each housing shown in Fig. 1; 4 corresponds to FIG. 11 shown according to the prior art.

In these figures, the load side is three banks (transformers). The bus communication panel 3 and the disconnect switch panel 4 which are not shown in detail are assembled in the middle of the aligned panel. As a result, the number of insulated bushings connecting the cable and the housing increases and is complex.

First, in Fig. 1, the second transformer primary panel 2B is provided on the left side of the wide VCT panel shown at the right end of the rear surface. The third transformer primary panel 2C is installed on the right side of the VCT panel 1, but is shown in front of the VCT panel 1 in the front row due to the constraints of the ground.

On the left side of the second transformer primary panel 2B, a wide bus communication panel 3 to be described in detail in FIG. 2 is provided. On the left side of this bus communication panel 3, a disconnect switch funnel 4 to be described in detail in Figs. 3 and 4 is provided.

On the left side of the disconnect switch panel 4, a first transformer primary panel 2A is provided. On the left side of the first transformer primary panel 2A and the right side of the third transformer primary panel 2C described above, power receiving panels 6A and 6B are respectively connected to different power supply systems.

Insulation bushings 7A, 7B, and 7C are vertically penetrated in the ceiling of the power receiving panel 6A on the left side in a zigzag manner from the front.

In front of the first transformer primary panel provided on the left side of the power receiving panel 6A, cable heads 10A, lOB, and LOC connected to a step-down transformer on the load side are shown in FIG. 12 according to the prior art. It is provided similar to the cable head 44A shown. The insulation bushings 8A, 8B and 8C are provided vertically through the rear side of the ceiling in a zigzag form.

Insulating bushings 7D, 7B, and 7F are vertically penetrated through the ceiling in a zigzag manner in the ceiling of the disconnection switch panel 4 provided on the right side of the first transformer primary panel 2A. Behind the insulating bushings 7D and 7B. 7F, insulating bushings 8D and 8B.8F are provided vertically through the ceiling in a zigzag form. Insulation bushings 7G, 7H, 7J are vertically penetrated vertically in front of the ceiling in the ceiling of the bus communication panel 3 provided on the right side of the disconnect switch panel 4. Behind these insulation bushings 7G, 7H and 7J, insulation bushings 8G, 8H and 8J are provided through the ceiling in a zigzag form.

In addition, the insulation bushings 7K, 7L, and 7M are vertically penetrated vertically in the front end of the ceiling in the ceiling of the bus shaping panel 3. Behind these insulation bushings 7K, 7L and 7M, insulation bushings 8K, 8L and 8M are provided vertically through the ceiling in a zigzag form.

In addition, the ceiling of the bus communication panel 3 is insulated between two sets of insulation bushings (7G, 7H, 7J, 8G, 8H, 8J and 7K, 7L, 7M, 8K, 8L, 8M) on the left and right sides. Bushings 9A, 9B and 9C are provided through the ceiling in this order from the front side to the rear side.

At the front end of the ceiling of the second transformer primary panel 2B provided on the right side of the bus communication panel 3, the cable heads 10D, 10E, and 10F connected to the step-down transformer on the load side are shown in FIG. It is provided similarly to the cable head 44A. Behind these cable heads 10D, lOB, and 10F, the insulation bushings 9D, 9E, and 9F have the same space as the space between the insulation bushings 9A, 9B, and 9C, in this order from the front to the rear. They are vertically penetrated in zigzag form and are installed respectively.

Insulation bushings 7N, 70, and 7P are provided vertically through the front left side in a zigzag form on the ceiling of the VCT panel provided on the right side of the second transformer primary panel 2B. At the rear of the insulating bushings 7N, 70, 7P, the insulating bushings 8N, 80, 8P are provided vertically through the rear right side in a zigzag form.

At the front end of the ceiling of the third transformer primary panel 2C provided on the right side of the VCT panel 1, the cable heads 10G, 10H, 10J connected to the step-down transformer on the load side are shown in FIG. 12 according to the prior art. It is installed similar to the cable head 44A shown. At the rear of the cable heads 10G, 10H, and 10J, insulating bushings 8Q, 8R, and 8S are provided vertically through the rear side of the ceiling in a zigzag form.

Insulation bushings 70, 7R, 75 are provided in a zigzag shape and vertically penetrate the front side in the ceiling of the power receiving panel 6B provided on the right side of the third transformer primary panel 2C.

On the ceiling of this aligned panel, an A-phase cable 11A, a B-phase cable 11B and a C-phase cable 11C are installed to insulate bushings 7A, 7B, and 7C and insulated bushings 7D, 7E, and 7F. Are connected to each other. The A-phase cable 11A ', the B-phase cable 11B', and the C-phase cable 11C 'are provided so as to connect the insulation bushings 7D, 7E, and 7F and the insulation bushings 7G, 7H, and 7J, respectively. . These cables 11A, 11B, 11C, 11A '. 11B', 11C 'constitute the 1st bus which connects the power receiving panel 6A, the disconnection switch panel 4, and the bus opening panel 3. As shown in FIG.

On the ceiling of these aligned panels, the A phase cable 12A, the B phase cable 12B, and the C phase cable 12C have the insulation bushings 8A, 8B, 8C and the insulation bushings 8D, 8E, 8F respectively. It is installed to connect. The A-phase cable 12D, the B-phase cable 12B, and the C-phase cable 12F are provided so as to connect the insulation bushings 8D, 8E. 8F and the insulation bushings 8G, 8H, 8J, respectively. These cables 12A, 12B, 12C, 12D, 12E, 12F constitute a third bus connecting the first transformer primary panel 2A, the disconnect switch panel 4 and the bus communication panel 3.

On the ceiling of these aligned panels, the A-phase cable 11D, the B-phase cable 11B, and the C-phase cable 11P respectively provide insulation bushings 7K, 7L, and 7M and insulation bushings 7N, 70, and 7P, respectively. It is installed to connect. The A-phase cable 11G, the B-phase cable 11M, and the C-phase cable 11J are provided to connect the insulation bushings 7N, 70, and 7P and the insulation bushings 7Q, 7R, and 7S, respectively. These cables 11D, 11B, 11p, 11G, 11H, 11J constitute a second bus connecting the bus communication panel 3, the VCT panel 1, and the power receiving panel 6B.

On the ceiling of these aligned panels, phase A cable 12G. The B-phase cable 12H and the C-phase cable 12J are provided so as to connect the insulation bushings 8K, 8L, 8M and the insulation bushings 8N, 80, 8P, respectively. The A-phase cable 12K, the B-phase cable 12L, and the C-phase cable 12M are provided to connect the insulation bushings 8N, 80, and 8P and the insulation bushings 8Q, 8R, and 8S, respectively. These cables 12G, 12H, 12J, 12K, 12L, 12M constitute a fourth bus connecting the bus top panel 3, the VCT panel 1 and the WP2 transformer primary panel 2C.

On the ceiling of these aligned panels, the A-phase cable 13A, B-phase cable 13B and C-phase cable 13C connect the insulation bushings 9A, 9B, 9C and the insulation bushings 9D, 9E, 9F, respectively. It is installed to connect. These cables 13A, 13B and 13C constitute a fifth bus connecting the bus communication panel 3 and the second transformer primary panel 2B. As a result, on the ceiling of the bus communication panel 3, a total of 5 groups (15 in total) of insulation bushings are installed to connect the cables. As a result, as will be described later, nine lines of cables are provided in the transverse direction on the ceiling shown in FIG.

3 is a main circuit disconnection connection diagram of the gas insulated metal closed switchgear shown in FIG. 4 is a main circuit disconnection connection arrangement diagram showing a state of the main circuit equipment shown in FIG. 3 distributed and housed in the housing shown in FIG.

As shown in Fig. 3, this gas insulated metal closed switchgear represents a power receiving facility for supplying power to a load by swiping power received from two systems to three transformers.

In Figures 3 and 4, the same reference numerals for the devices denote devices that are the same or corresponding to those shown in Figure 11. In Fig. 3, CT is a current transducer, LA is a piezoelectric, VD is a voltage detector, DS is a disconnect switch, VCB is a vacuum circuit breaker, ES is a ground switch and T is a transformer.

The disconnect switches 14C and 14A also function as first and second receiving side bus communication disconnect switches. Disconnect switches 14D and 14B function as first and second load side bus communication disconnect switches, respectively.

The disconnect switch 15A functions as a load side disconnect switch, the vacuum circuit breaker 16A functions as a power receiving side vacuum circuit breaker, and the disconnect switch 15B functions as a power supply side disconnect switch. The vacuum circuit breakers 16B and 16C respectively function as load side vacuum circuit breakers.

The apparatus shown by reference numerals 7A, 7B and 7C from the current converter CT on the upper left side of FIG. 3 during the insulation bushing is housed in the first power receiving panel 6A shown in FIG. Reference numerals 7A, 7B, and 7C denote insulating bushings 7A, 7B, and 7C installed vertically through the ceiling of the power receiving panel 6A shown in FIG.

In addition, the apparatus shown by reference numerals 7A, 7B, 7C from the current converter CT on the upper left side of FIG. It is accommodated in the 2nd power receiving panel 6B shown in FIG. Reference numerals 7G, R, and S denote insulating bushings 7A, 7B, and 7C installed vertically through the ceiling of the power receiving panel 6B shown in FIG.

Hereinafter, reference numerals 7D, E, F, and 8D, E, F shown on the load side of the insulation bushings 7A, 7B, and 7C shown on the left side of FIG. 3 vertically penetrate the ceiling of the disconnect switch panel 4, respectively. Mark the installed insulation bushings (7D, 7E, 7F and 8D, 8E, 8F).

In addition, reference numerals 7G ... 8J ... 9A ... in FIG. 3 also denote an insulating bushing that vertically penetrates the ceiling of each housing. However, descriptions involving other main circuit arrangements connected to each other via these insulating bushings will be omitted.

As shown in Figs. 1 and 4, a total of five groups of insulating bushings connected to the left and right housings by cables are provided on the ceiling of the bus communication panel 3. In the case of this gas insulated metal closed switchgear, the insulating bushing is arranged very closely on the ceiling of this bus communication panel 3.

2 is an enlarged vertical cross-sectional view of A-A of FIG. 2 shows an arrangement of an insulation bushing provided vertically through the ceiling of the bus communication panel 3 and the main circuit equipment of the housing of the bus communication panel 3.

In Fig. 2, in the housing 22 of the bus communication panel 3, the partition member 22b perpendicular to the center, the partition member 22a in front of the partition member 22b, and the partition member 22b. The partition member 22c is provided in the back.

In the middle of these partition members 22a, 22b and 22c, there is a horizontal partition member 22f between the partition members 22a and 22b and the horizontal partition member 22g between the partition members 22b and 22c.

In the gas insulation chamber surrounded by the dividers 22a, 22b and 22c, the breaker of the break switch 14A is housed together with the ground switch 14a mounted below the break switch 74A. In the gas insulation chamber surrounded by the dividers 22a, 22c, and 22g, the breaker of the break switch 14B, together with the ground switch 14b, is symmetrically housed with the break switch 14A and the ground switch 14a. Under the breakers of these break switches 14A and 14B, breakers of the break switches 14C and 14D whose upper electrodes are connected to the spacers 22h and 22j are accommodated, respectively.

In the low pressure chamber provided on the left side of the disconnect switch 14A, 14C, the operation mechanism part of the disconnect switch 14A, 14C and the ground switch 14a, 147 is assembled. In the low pressure chamber provided on the right side of disconnect switch 14B, 14D, the operation mechanism part of disconnect switch 14B, 14D and ground switch 14b, l4d is assembled.

Spacers 22h and 22g are symmetrically provided in the partition members 22f and 22g. The ground switches 14a and 14b are connected to the upper ends of the spacers 22h and 22j, respectively. The lower ends of these spacers 22h and 22j are connected to ground switches 14c and 14d mounted on top of the disconnect switches 14C and 14D stored in the gas insulation chamber formed of the lower partitions 22f and 22g, respectively. .

In addition, the insulating bushings 7K, 7L, and 7M shown in FIG. 1 vertically penetrate the ceiling plate at the upper part of the front disconnect switch chamber. Insulation bushings (8K, 8L, 8M) are on the right side of the insulation bushings (7K, 7L, 7M). It penetrates vertically through the top plate of the upper part of the right disconnect switch chamber.

Further, at the front end of the insulation bushing 7K, the insulation bushing 9A and the cable 13A shown on the center front side of the bus communication panel 3 shown in Fig. 1 are provided. Similarly, the insulation bushing 9B and the cable 13B are provided in the center of the ceiling plate between the insulation bushings 7M and 8K. In addition, the insulation bushing 9C and the cable 13C are provided at the rear end of the ceiling plate.

2. One of the conductors 22k connected to the lower ends of the insulation bushings 7K, 7L, and 7M is connected to the rear end of the disconnect switch 14A (only one of which is shown). One of the conductors 221 connected to the lower ends of the insulation bushings 8K, 8L, 8M is connected to the front end of the disconnect switch 14B (only one of which is shown). The conductor 22m connected to the rear end of the disconnect switch 14C (only one of which is shown) is provided in the vertical direction of the drawing via an insulator fixed to the lower bottom plate, and is erected along the left side of the housing 22. It is connected to the lower end of the insulation bushings 7G, 7H, 7J which penetrated the top plate of the housing 22, respectively.

The conductor 22n connected to the front end of the disconnect switch 14D (only one of which is shown) is provided in a direction perpendicular to the drawing via an insulator fixed to the lower front plate, and is erected along the left side of the housing 22. It is connected to the lower end of the insulation bushing 8G, 8H, 8J which penetrated the top plate of the housing 22, respectively.

Conductors 22o, each connected between the front end of ground switch 144 (only one of which is shown) and the bottom of insulating spacer 22j (only one of which is shown), are branched from the insulator fixed to housing 22, It passes in the direction perpendicular to the figure, and is connected to the lower ends of the insulating bushings 9A, 9B, 9C which penetrate the top plate of the housing 22, respectively.

In addition, all insulation bushings through the ceiling and all cables installed on the ceiling are covered by cable ducts (not shown).

FIG. 5 is a partially enlarged detail view of the insulating bushings 7N, 70, and 7P of the VCT panel 1. This figure shows each phase, such as the insulation bushings 7N, 70, 7P of the VCT panel 1 connected by cables to both sides of the insulation bushing vertically penetrating the ceiling of the housing as shown in FIG. Represents a mounting space between the insulating bushings arranged in close proximity to FIG. The insulation bushings of each group are provided in close proximity to the ceiling of the other housing in the same space as the insulation bushings 7N, 70, 7P.

That is, in the case of the insulation bushings 7N, 70.7P which are one group of R-, S-, and T-phases, the mounting space Pl between each of the phases is each of the insulation bushings 7N, 70, 7P. It is slightly narrower than the maximum width W of the head 7a.

Therefore, the mounting space P2 in the longitudinal direction (left to right in Fig. 5) of the insulation bushings 7N, 70, 7P of each phase is equal to the length of each head 7a of the insulation bushings 7N, 70, 7P. Shorter than L).

In the head 7a, an insulating layer is formed of an epoxy resin on an outer portion of a central conductor (not shown) embedded in the inner center. Both ends of this insulating layer are trapezoidal in shape. The flanges of the cable connection braces 11a are fixed to the outer surface of each head 7a by bolts.

The insulation bushings 7N, 70, 7P overlap each other in the trapezoidal portions described above in the left and right directions shown in FIG. Thus, a tool for clamping a fixture (not shown) that secures the insulating bushing to the ceiling of the housing is inserted between the cylindrical outer portion of the cable connection brace and the side of the head 7a of the adjacent insulating bushing. There is a small enough gap to do this.

In addition, a ground layer is formed on the surface of the head 7a. The surface of each head 7a of the insulating bushing is maintained at ground potential, as is the ceiling of each housing.

In the case of the gas insulated metal closed switchgear as described above, in which three-phase insulated bushings are installed in the longitudinal and transverse directions to vertically penetrate the ceiling, the conventional insulated bushings are arranged as shown in FIG. The depth and width of the housing can be reduced compared to the gas insulated metal sealed switchgear. Therefore, the floor space required for installing the switchgear according to the present embodiment can be reduced.

In addition, in the case of the wide bus communication panel 3, between four groups of insulating bushings (7G, 7H, 7J: 7K, 7L, 7M: 8G, 8H, BJ; 8K, 8L, 8M) in front and rear. 1 group of insulation bushings (9A, 9B, 9C) are installed and these insulation bushings (9A, 9B, 9C) and two sets of front and rear insulation bushings (7G, 7H, 7J: 7K. 7L, 7M: 8G, 8H, 8J) By installing mounting cables (13A, 13B. 13C) connecting the front and rear of 8K, 8L.8M) in the center, a total of 5 groups of insulation bushings can be arranged in a minimum space and the left and right panels can be connected by cables.

In addition, the length of the cable, such as a cable installed from the top of the ceiling of the VCT panel 1 to the top of the ceiling of the power receiving panel 6B, is the same in the three phases of each group except the cables 13A, 13B, and 13C. can do. Therefore, these cables are compatible including insulation bushings in three phases, making them easy to assemble.

In addition, the insulation bushings 9A, 9B and 9C installed in the center of the bus communication panel 3 in a zigzag form, such as the insulation bushings 9D, 9B and 9F of the second transformer primary panel 2B, are arranged on the right side. By arranging these insulation bushings 9D, 9E, and 9F in a line in the center of the ceiling as insulated bushings 9A, 9B, and 9C on the left side, the lengths of the cables 13A, 13B, and 13C can be made the same. .

Next, FIG. 6 is an enlarged cross-sectional view of the power receiving panel 6A located on the left side, taken along line B-B shown in FIG. Among these insulated bushings installed in the ceiling, the insulated bushing shown by broken lines is an insulation in the housing when the power receiving panel 6A is arranged in the middle of the aligned panel of the gas insulated metal closed switchgear having a different specification from that shown in FIG. Represents the bushing.

In Fig. 6, a U-shaped partition member 18a is provided on the upper portion of the housing 18 to form a gas insulation chamber 18d between the partition member 18a and the ceiling plate. 15 A of load side primary circuit disconnect switches penetrate the front end of this gas insulation chamber 18d, and are provided.

This primary circuit disconnect switch 15A is equipped with a ground switch on its top. The operation mechanism part 15a of the primary circuit disconnect switch 15A and the operation mechanism part 15b of the ground switch are attached to the front side front of the partition member 18a in the atmospheric heat storage chamber.

The vacuum circuit breaker 16A which penetrates the upper part of the partition material 18a provided downward is provided in the lower front side of the partition material 18a, and the operation mechanism part 16a of the vacuum circuit breaker 16A is the partition material 18b. ) Is mounted on the front side.

Under 16 A of vacuum circuit breakers, the power supply side primary circuit disconnect switch 15B is provided through the partition material 18a. Moreover, the operation mechanism part 15c of this primary circuit disconnect switch 15B and the operation mechanism part 15d of the ground switch are being fixed to the lower front side of the partition material 18b.

Under the primary circuit disconnect switch 15B, the piezo 19 is mounted through the divider 18b, and the rear end of the piezo 19 is the lower portion of the upper primary circuit disconnect switch 15B. It is connected to the electrode.

In the upper part of the partition member 18c provided downward from the lower rear end of the partition member 18a, the front end of the cable head 17 penetrates and is installed in a sealed state. The upper end of the power supply side cable raised from the rear lower floor of the housing 18 is connected to the lower end of this cable 17. This cable penetrates through the through-type current converter CT fixed to the lower back side of the partition 18c.

Insulating bushings 7A, 7B and 7C are arranged in this order from the front side on the ceiling of the housing 18. The lower ends of these insulating bushings 7A, 7B, and 7C are respectively connected to the upper electrode (only one of which is shown) of the load-side primary circuit disconnect switch 15A by a conductor. In the center of these insulation bushings 7A, 7B, 7C, cables 11A, 11B, 11C constituting the first bus shown in Fig. 1 are provided.

In addition, in the present invention, the cables 12A, 12B and 12C and the cables 13A, 13B and 13C are provided as shown in FIG. 6 together with the insulated bushing shown by the dotted line in FIG. It is applied to a gas insulated metal closed switchgear which is located according to the specifications of the user between the transformer primary panel 2A and the disconnect switch panel 4 or between the bus communication panel 3 and the disconnect switch panel 4.

FIG. 7 is an enlarged vertical sectional view of the transformer primary panel 2A, taken along line C-C shown in FIG.

In Fig. 7, in the housing 23 of the transformer primary panel 2A, the divider 23b is perpendicular to the center thereof, and the divider 23a is in front of the divider 23b, and the divider 23c. ) Is provided behind the partition member 23b. Insulation gas is filled in the chamber enclosed by the division materials 23a, 23b, and 23c.

The front door 23d is mounted on the front side of the housing, and the upper door 23e and the lower section 23f are mounted on the rear side of the housing 23.

The cable heads 10A, lOB.LOC shown in Figs. 1, 3, and 4 vertically penetrate the ceiling of the housing 23 at the front end between the partition members 23a and 23b so that the cable connection side is located in the front ridge. It is installed. The insulating bushings 8A, 8B and 8C are provided through the ceiling of the housing 23 at positions between the dividers 23b and 23c. The cables 11A, 11B, 11C shown in FIG. 1 are shown in the ceiling between the cable heads 10A, 10B, lOC and the insulation bushings 8A, 8B, 8C.

On the upper part of the partition member 23a, the ground switch 16c is mounted through the partition member 23a. The conductor 23g (only one of which is shown) is connected between the rear end of the ground switch 16c and one of the lower ends of the cable heads 10A, 1OB, and 1OC, respectively.

The vacuum circuit breaker 16B is mounted through the partition member 23a at the bottom of the ground switch 16C. The upper terminal behind the vacuum circuit breaker 16B is connected to the rear end of the ground switch 16C.

The insulating space 23j is mounted through the partition member 23b vertically in the lower horizontal portion thereof. The lower terminal on the rear side of the vacuum circuit breaker 16B is connected to the upper end of the insulating spacer 23j.

The disconnect switch 15C is mounted through the partition member 23a at the lower portion of the vacuum circuit breaker 16B. The upper terminal on the rear side of the disconnect switch 15C is connected to the lower end of the insulating spacer 23j. The insulator 23k is attached to the bottom plate of the housing 23. The insulator 23k 'is attached to the rear side of the partition member 23b. The lower terminal on the rear side of the disconnect switch 15C is an insulating bushing 8A, 8B, 8C provided through the ceiling of the housing 23 on the rear side by conductors 23m, 23n fixed to the insulators 23k, 23k '. Is connected to one of).

As shown above, the third transformer primary panel 2C shown on the right side of FIGS. 1 and 4 is configured in the same manner as the first transformer primary panel 2A. In the second transformer primary panel 2B shown in the middle of Figs. 1 and 4, the internal arrangement of the main circuit equipment is the same as in the first transformer primary panel 2A. However, in the dividing member 23b, the upper part of the dividing member 23b extends forward as shown by the one-point chain breaking. Instead of the insulation bushings 8A. 8B and 8C, the insulation bushings 9D, 9B and 9F are provided vertically through this part of the ceiling of the housing 23 with a gap between the width directions.

As mentioned above, the 2nd transformer primary panel 2B is a 1st transformer in the shape of the partition 23b, the opening of the ceiling of the housing 23, and the mounting position of the insulation bushings 9D, 9B, and 9F. It is different from the primary panel 2A.

3, the ground switch is adjacent to the insulation bushings 9D, 9E, 9F of the second transformer primary panel 2B for the second transformer T, similarly to the transformer primary panels 2A, 2C on the left and right sides. Should be shown at the location. However, these grounding switches have been omitted to avoid the complexity of the drawings.

Hereinafter, a gas insulated metal closed switchgear according to a second embodiment of the present invention will be described. Fig. 8 shows a vertical sectional view of the transformer primary panel 5Z of this gas insulated metal closed switchgear, which corresponds to FIG. 7 of the gas insulated metal closed switchgear according to the first embodiment of the present invention. In Fig. 8, the cable head is installed at the rear of the ceiling of the transformer primary panel according to the specification of the user.

In FIG. 8, insulating bushings 8X, 8Y, 8Z for connecting adjacent housings are provided vertically through the middle front of the ceiling of the housing 74 of the transformer primary panel 5Z. The cable heads (OX. 10Y, 10Z) for connection to the load side transformer penetrate vertically through the rear of the ceiling of the housing 24, and the cable contact side thereof is located toward the rear.

In Fig. 8, the cables 11X, 11Y. 112 connecting the devices on both sides of the housing 24 are connected to the ceiling between the Cayolled 10X. 10Y, 10z and the insulation bushings 8X, 8Y, 8Z. Are shown.

Under the left side insulation bushings 8X, 8Y, 8Z, a U-shaped partition member 24a is provided downward from the ceiling of the housing 24. The disconnect switch 15D is mounted through the front of the partition member 24a horizontally.

The partition member 24b is provided vertically between the bottom plate of the partition member 24a and the bottom plate of the housing 24. The vacuum circuit breaker 17C is mounted through the upper portion of the partition member 24b. The ground switch 16C is mounted through the divider 24b at the lower portion of the divider 24b.

The insulating spacer 24k is mounted through the bottom plate of the partition member 24a. The lower terminal on the rear side of the disconnect switch 15D is connected to the upper end of the insulation spacer 24k. The upper terminal of the rear side of the vacuum circuit breaker 16C is connected to the lower end of the insulating spacer 24k.

The lower terminal on the rear side of the vacuum circuit breaker 16C is connected to the rear end of the ground switch 16c via the conductor 24f, and this lower terminal (only one of which is shown) is connected to the conductors 24g, 24h, 24j. It is connected to one of the cable heads (OX, 10Y, 10Z) provided to penetrate vertically through the rear of the ceiling.

One of the lower ends of the insulation bushings 8X 8Y and 8Z provided through the middle front of the ceiling of the housing 24 is connected to the upper terminal of the rear side of the disconnect switch 15D. It is attached to the front side of the housing 24 of the front door 24c. The rear door 24d and the partition member 24e are attached to the rear side of the housing 24.

Insulation gas is filled in the chamber between the partition member 24a and the chamber between the partition members 24b and 24c. As described above, by constructing the transformer primary panel of the gas insulated metal closed switchgear, the present invention can be applied to a power receiving facility in which the step-down transformer is located on the rear side of the housing of the gas insulated metal closed switch gear.

9 is a plan view showing a gas insulated metal closed switchgear according to a third embodiment of the present invention. 10 is an enlarged cross-sectional detail view of D-D of FIG.

9 and 10 show a case where the strategic power receiving system is a 7CB-1VCT-2CB or 2CB-1VCT-2DS power receiving facility such as the conventional switchgear shown in FIG. The transformer primary panels 5A and 5B are provided adjacent to each other on both sides of the centered VCT panel 1A, and the power receiving panels 6A and 6B are provided on both sides of these transformer primary panels 5A and 5B, respectively. It is installed.

9 and 10, cables 11R, 11S, and 11T constituting the first bus are provided at the ceiling of the VCT panel 1A and vertically penetrate the ceiling of the VCT panel 1A. It is connected to the insulation bushings 7R, 7S, and 7T provided, respectively.

In front of these insulation bushings 7R and 7S.7T, an insulation bushing 8R to which the second bus cable 12R is connected is provided. Thereafter, an insulating bushing 8T to which the second bus cable 12T is connected is provided. These insulating bushings 8R and 8T vertically penetrate the ceiling of the VCT panel IA. S phase second bus insulated bushings and cables may be omitted since they are common to S phase first bus insulated bushings 75 and cable 115.

Lower ends of the insulation bushings 7R and 8R are connected to the U-phase current transducers of the VCT, and lower ends of the insulation bushings 7T and 8T are connected to the W-phase current transducers 20B of the VCT, and the insulation bushings 75 are provided. The lower end of is connected to the power supply side of the potential converter 21 of the VCT.

In the gas insulated metal closed switchgear configured as described above, the space in the cross direction between the insulation bushings of each group can be made slightly narrower than the maximum width of the head of each insulation bushing shown in FIG. In addition, by eliminating the S phase of the second bus and using the S phase of the first bus in common, the cable connection work can be reduced. Therefore, the amount of work of the installation work at the installation site can be reduced.

As described above, according to the present invention, the space occupied by the insulation bushings on the ceiling and the outer wall of the housing of the gas insulated metal closed switchgear can be reduced. Thus, it is possible to obtain a gas insulated metal closed switchgear that can reduce the depth of the housing and exhibit gas insulation characteristics.

It is clear that various modifications and variations of the present invention are possible within the spirit. It is, therefore, to be understood that within the scope of the appended claims, it may be practiced otherwise than as specifically described herein.

Claims (10)

A housing accommodating a plurality of circuit devices; At least three first insulating bushings penetrating the outer wall of the housing; At least three second insulating bushings penetrating the outer wall of the housing; Each of which connects one of the first insulating bushings and one of the second insulating bushings, respectively, and has at least three cables positioned parallel to each other adjacent to an outer wall of the housing, wherein the first and second insulating bushings are respectively At least one side of the trapezoidal portion is connected to one of the cables, respectively, to have a head having trapezoidal portions formed at both sides thereof and to be connected to the circuit arrangement; On the side of the second side of the trapezoidal part of the second phase insulation bushing of the first and second insulated bushing of the first and second insulation bushing of the side of the first side of the trapezoidal part of the first phase insulation bushing Each adjacent; A side of the first side of the trapezoidal portion of the second phase insulation bushing among the first and second insulation bushings is a side of the first side of the trapezoidal portion of the third phase insulation bushing among the first and second insulation bushings. A gas insulated metal closed switchgear, each adjacent to each other. A first power receiving panel supplied with a first power supply from a first power supply system, a second power receiving panel supplied with a second power from a second power supply system, a first power receiving side bus communication disconnect switch and a second power receiving side bus communication disconnecting switch; A bus communication panel accommodating a first load side bus communication disconnect switch and a second load side bus communication disconnect switch, and a housing accommodating a VCT panel accommodating a VCT; the first power receiving side connected to a load side of the first power receiving panel A first side of the bus communication disconnect switch; A first side of the second receiving side bus communication disconnect switch connected to the load side of the second receiving panel; A second side of said first power receiving side bus communication disconnect switch connected to a second side of said second receiving side bus communication disconnect switch; A first side of said first portion lower bus communication disconnect switch adapted to be connected to said load side of said first power receiving panel and to a first load side transformer; A first side of said second load side bus communication disconnect switch adapted to be connected to said load side of said second power receiving panel through a VCT panel and to a second load side transformer; A second side of said first load side bus communication disconnect switch adapted to be connected to a second side of said second load side bus communication disconnect switch and to a third load side transformer; A first insulating bushing group penetrating the front of the ceiling of the housing at a first side and connecting the load side of the first power receiving panel and the first side of the first power receiving bus disconnect switch; A second insulating bushing group penetrating the front of the ceiling of the housing at a second side and connecting the load side of the second receiving panel and the first side of the second receiving side bus communication disconnect switch; A third insulation bushing group penetrating the rear of the ceiling of the housing at a first side and connecting the load side of the first power receiving panel and the first side of the first load side bus communication disconnect switch and the first load side transformer; And; A fourth insulating bushing group penetrating the rear of the ceiling of the housing on a second side and connecting the first side and the second load side transformer of the VCT and the second load side bus communication disconnect switch; A fifth insulated bushing group penetrating said ceiling of said housing and connecting said second side of said first and second load side bus communication disconnect switches and said third load side transformer. Type switchgear. 3. The method of claim 2, wherein the first, second, third, and fourth insulating bushing rules are comprised of first, second, and third phase insulating bushings, respectively; In the first, second, third and fourth insulating bushing groups, the first, second and third phase insulating bushings have heads having trapezoidal portions formed at both sides thereof; A side surface of the first side of the trapezoidal portion of the first phase insulation bushing is provided adjacent to a side surface of the second side of the trapezoidal portion of the second phase insulation bushing; The side of the first side of the trapezoidal portion of the second phase insulation bushing is provided adjacent to the side of the first side of the trapezoidal portion of the third phase insulation bushing. 4. The method of claim 3, wherein the second phase insulation bushing of the fifth insulation bushing group is a third phase insulation bushing of the group of second insulation bushings and the first phase insulation bushing of the third insulation bushing group is the second insulation. A first phase insulation bushing of the bushing group and the first phase insulation bushing of the first insulation bushing group; A first side of the middle portion of the first phase insulation bushing of the fifth insulation bushing group; And the third phase insulation bushing of the fifth insulation bushing group is installed on a second side of a middle portion of the third phase insulation bushing of the third insulation bushing group and the third phase insulation bushing of the fourth insulation bushing group. Gas insulated metal closed switchgear, The method according to any one of claims 2 to 4. The bus communication panel is composed of a first longitudinal divider, a second longitudinal divider, a third longitudinal divider and a transverse divider, between the first and second longitudinal dividers and in the transverse direction. A first gas insulated chamber under the divider, between the first and second longitudinal dividers, and a second gas insulated chamber on the transverse divider, between the second and third longitudinal dividers and being transverse Forming a third gas insulating chamber under the directional divider, between the second and third longitudinal dividers, and forming a fourth gas insulating chamber on the lateral divider; In the bus communication panel, the first power receiving side bus communication disconnect switch is housed in the first gas insulated chamber, the second power receiving side bus communication disconnect switch is housed in the second gas insulation chamber, and the first load side And a bus communication disconnect switch is housed in the third gas insulated chamber, and the second load side bus communication disconnect switch is housed in the fourth gas insulated chamber. 5. The method of any one of claims 2 to 4, wherein one of the first and second receiving panels is provided with dividers to form an upper gas insulating chamber and a lower gas insulating chamber below the upper gas insulating chamber. ; In one of the first and second power receiving panels, a load side disconnect switch is housed in the upper gas insulated chamber, a power receiving side vacuum circuit breaker is housed in the lower gas insulator chamber, and a power supply side disconnect switch in the lower gas insulator chamber. Housed under the power receiving side vacuum circuit breaker, an upper electrode of the power receiving side vacuum circuit breaker is connected to a lower electrode of the load side disconnect switch, and an upper electrode of the load side vacuum circuit breaker is a lower electrode of the power receiving side vacuum circuit breaker; And the insulating bushing is connected to the upper electrode of the load side disconnect switch through the first and second receiving panels. The transformer primary panel according to any one of claims 2 to 4, further comprising a plurality of transformer primary panels, wherein the transformer primary panel is provided with a divider, and has an upper gas insulating chamber and an upper gas insulating chamber below the lower gas. Forming an insulation chamber; In the transformer primary panel, the load side vacuum circuit breaker is housed in the upper gas insulator chamber, the disconnect switch is housed in the lower gas insulator chamber, and the upper electrode of the disconnect switch is connected to the lower electrode of the load side vacuum circuit breaker. An insulation bushing is installed through the ceiling of the transformer primary panel and connected to the lower electrode of the disconnect switch, a cable head is installed through the ceiling of the upper gas insulation chamber, and the load side vacuum circuit breaker Gas-insulated metal closed switchgear, characterized in that connected to the upper electrode of the The apparatus of any one of claims 2 to 4, further comprising a plurality of transformer primary panels; The transformer primary panel is provided with a divider to form an upper gas insulating chamber and a lower gas insulating chamber below the upper insulating chamber; In the transformer primary panel, a disconnect switch is housed in the upper gas insulator chamber, a load side vacuum circuit breaker is housed in the lower gas insulator chamber, and an upper electrode of the load side vacuum circuit breaker is connected to a lower electrode of the disconnect switch. Being; An insulating bushing is installed through the ceiling of the upper gas insulating chamber and connected to the upper electrode of the disconnect switch; And a cable head penetrates the ceiling of the lower gas insulated chamber and is connected to the lower electrode of the load side vacuum circuit breaker. A first power receiving panel receiving the first power supply from the first power supply system, wherein the first insulation bushing group is connected to the load side through the ceiling of the housing; A second power receiving panel receiving a second electric power from a second power supply system, wherein a second insulating bushing group is connected to the load side through a ceiling of the housing; A VCT panel positioned between the first and second power receiving panels, the third and fourth insulating bushing groups penetrating the ceiling of the housing, and accommodating the VCT; The third insulating bushing connected to the first and second insulating bushings by a cable; A first transformer primary panel positioned between the first power receiving panel and the VCT panel, the fifth insulating bushing group penetrating the ceiling of the housing, and supplying power to the load side; A second transformer primary panel positioned between the second power receiving panel and the VCT panel, the sixth insulating bushing group penetrating the ceiling of the housing, and supplying power to the load side; The fourth insulation bushing group connected to a six insulation bushing group; A first phase insulation bushing of a fourth insulation bushing group located in front of the third insulation bushing group; A third phase insulation bushing of a fourth insulation bushing group located behind the third insulation bushing group; A second phase insulation bushing of the fifth insulation bushing group connected to the second phase insulation bushing of the first insulation bushing group; And a second phase insulation bushing of the sixth insulation bushing group connected to the second phase insulation bushing of the second insulation bushing group, wherein the second phase insulation bushing of the third insulation bushing group is the fourth insulation bushing group. Gas insulated metal closed switchgear, characterized in that it is used as a second phase insulated bushing. 10. The method of claim 9, wherein the first, second, and third insulation bushing groups are comprised of first, second, and third phase insulation bushings, respectively; In the first, second and third insulating bushing groups, the first, second and third phase insulating bushings each have a head having trapezoidal portions formed at both sides; The first side surface of the trapezoidal portion of the first phase insulation bushing is provided adjacent to the side surface of the second side of the trapezoidal portion of the second phase insulation bushing, and the first side surface of the trapezoidal portion of the second phase insulation bushing. The side of one side is provided in close proximity to the side of the first side of the trapezoidal portion of the third phase insulation bushing, gas insulated metal closed switchgear. ※ Note: The disclosure is based on the initial application.