WO2018109915A1 - Gas insulated switching apparatus - Google Patents

Abstract

Provided is a gas insulated switching apparatus with which it is possible to improve maintainability. This invention comprises a plurality of phase units A-C that have: circuit breakers CB1-CB3 having a main axis extending in one direction, the circuit breakers CB1-CB3 being serially disposed in the direction of the main axis; disconnectors DS1-DS6 provided at both sides of each of the circuit breakers CB1-CB3, each of the disconnectors DS1-DS6 being connected to the circuit breakers CB1-CB3; branch buses T1, T2 for connecting adjacent circuit breakers CB1, CB2 and adjacent circuit breakers CB2, CB3 through the disconnectors DS2-DS5, the branch buses T1, T2 being connected to supply circuits F1, F2; and a pair of main buses BB1, BB2 parallel to a circuit breaker row in which the circuit breakers CB1-CB3 are serially connected through the disconnectors DS1-DS6 and the branch buses T1, T2, the main buses BB1, BB2 being connected to the disconnectors DS1, DS6 located at both ends of the circuit breaker row. The phase units A-C are disposed so that the circuit breaker rows are parallel. The pair of main buses BB1, BB2 are disposed so as to be adjacent on both sides of the disconnectors DS1-DS6.

Description

Gas insulated switchgear

Embodiments of the present invention relate to a 1 1/2 CB type gas insulated switchgear.

In general, a gas-insulated switchgear is configured by filling a high-voltage voltage charging unit such as a circuit breaker, a disconnector, or a bus in a metal container filled with an insulating gas such as SF ₆ gas and having a ground potential. ing. For this reason, safety and reliability are high, and the installation area is greatly reduced. Therefore, in recent years, gas insulated switchgears are used in various places.

As a circuit configuration of the gas-insulated switchgear, a so-called 1.1 / 2CB method is adopted as the bus method. This method is used in high-voltage substations that require high reliability. The 11 / 2CB method uses 3 circuit breakers for drawing 2 lines so that the system will not be affected even in the case of a bus accident, and the line must be stopped when inspecting the circuit breakers. It is a method that takes care not to accompany it.

FIG. 9 shows a single-line connection diagram of a circuit configuration of a 1 1/2 CB (breaker) system. As shown in FIG. 9, in the 1 · 1 / 2CB system circuit configuration, a pair of parallel main buses BB1 and BB2 fed from an external electric wire path are provided. Three circuit breakers CB1 to CB3 are provided in series between the main buses BB1 and BB2. Circuit breakers CB1 to CB3 are used to connect the remaining main buses BB1, BB2 or electric lines and disconnect only the faulty part when any of the main buses BB1, main buses BB2 or electric lines fails. used.

In order to keep the disconnection state securely, disconnectors DS1 to DS6 are provided at both ends of each of the circuit breakers CB1 to CB3. That is, disconnectors DS1 and DS2 are provided at both ends of the breaker CB1, disconnectors DS3 and DS4 are provided at both ends of the breaker CB2, and disconnectors DS5 and DS6 are provided at both ends of the breaker CB3. Is provided. A supply circuit F1 connected to the electric line is connected between the disconnecting devices DS2 and DS3, and a supply circuit F2 connected to the electric line is connected between the disconnecting devices DS4 and DS5.

Thus, the circuit configuration of the 11 / 2CB system is a configuration in which the breakers CB1 to CB3 are connected in series between the main buses BB1 and BB2 via the disconnectors DS1 to DS6.

Next, the arrangement relationship will be described for each configuration of a conventional gas-insulated switchgear to which the circuit configuration of the 1 · 1/2 CB system as described above is applied. FIG. 10 is a diagram showing a configuration of a conventional gas-insulated switchgear of the 1 · ½ CB method. FIG. 10 (a) is a plan view thereof, and FIG. 10 (b) is a view taken along the line XX of FIG. 10 (a).

As shown in FIG. 10 (a), in each of the three phases, the main buses BB1 and BB2 are positioned so that the three circuit breakers CB1 to CB3 are positioned on the same straight line between the main buses BB1 and BB2. It is arranged parallel to the extending direction. In addition, as shown in FIG. 10B, disconnectors DS1, DS2, disconnectors DS3, DS4, and disconnectors DS5, DS6 are arranged at both ends of each of the circuit breakers CB1 to CB3. The circuit breakers CB1 to CB3 are electrically connected in series via disconnectors DS1 to DS6 to form a circuit breaker array extending in one direction.

The circuit breaker rows of each phase are arranged in parallel with each other at one place to constitute a circuit breaker row group. Parallel to this circuit breaker row group, the main bus bar BB1 for three phases is collectively arranged on one side in the extending direction of the circuit breaker row, and the main bus bar BB2 for three phases is batched on the other side. Are arranged.

In each phase, main bus BB1 and disconnector DS1 are connected via connection bus IC1 and direct bus connection TJ-1, TJ-2, and main bus BB1 and circuit breaker train are electrically connected. Connected in series. The main bus BB2 and disconnector DS6 are connected via the connection bus IC2 and the direct bus connection TJ-1, TJ-2. The main bus BB2 and the circuit breaker row are electrically connected in series. It is connected to the.

Also, branch buses T1 and T2 are provided between the circuit breakers CB1 and CB2 and between the circuit breakers CB2 and CB3. The branch buses T1 and T2 are connected to supply circuits F1 and F2 connected to bushings L1 and L2 for supplying power to the main buses BB1 and BB2, in order to draw out from the main bus BB1 or the main bus BB2. Thus, each phase has a structure of 1 · 1/2 CB system. The main buses BB1 and BB2 and the center lines of the three-phase bushings L1 and L2 are parallel to the circuit breaker row.

JP 11-355923 A

As described above, the conventional gas-insulated switchgear has a configuration in which breaker rows and main buses connected in series via a disconnector are arranged together for three phases. Therefore, in each phase, the distance between the circuit breaker and disconnector and the main bus is increased. In other words, in each phase, the three-phase circuit breaker rows are arranged in parallel and the three-phase main busbars are arranged separately in locations arranged in parallel to the circuit breaker rows. For this reason, a circuit breaker train of another phase or a main bus of another phase is interposed between a circuit breaker train of one phase and a main bus corresponding thereto. For this reason, the distance between the circuit breaker train and the main bus is increased in each phase. As a result, there is a problem that layout layout efficiency is poor. In addition, it is difficult to determine the connection relationship by tracing which main disconnector is connected to one main bus, and it is very troublesome to perform maintenance and inspection, and the maintenance is poor. There was a problem.

The problem to be solved by the present invention is to provide a gas-insulated switchgear capable of improving the layout arrangement efficiency and improving the maintainability.

In order to achieve the above object, the gas-insulated switchgear according to this embodiment has the following configuration.
(1) First, second and third circuit breakers having a main shaft extending in one direction and arranged in series in the direction of the main shaft.
(2) A disconnector provided on each side of each of the first, second and third circuit breakers, each connected to the first, second and third circuit breakers.
(3) A branch bus connected between the adjacent circuit breakers via the disconnector and connected to a supply circuit.
(4) The disconnection, wherein the first to third circuit breakers are parallel to a circuit breaker row connected in series via the disconnector and the branch bus, and are located at both ends of the circuit breaker row. A pair of main busbars connected to the instrument.
(5) A plurality of phase units having the first, second and third circuit breakers, the disconnector, the branch bus, and a pair of main buses are provided.
(6) Each said phase unit is arrange | positioned so that each said circuit breaker row | line | column may become parallel.
(7) The pair of main bus bars are disposed adjacent to both sides of the disconnector.

It is a figure which shows the structure of the gas insulated switchgear which concerns on 1st Embodiment. (A) is a plan view, (b) is an XX arrow view of (a), and (c) is a YY arrow view of (a). It is a figure which shows the structure of the gas insulated switchgear concerning 2nd Embodiment. (A) is a plan view, (b) is an XX arrow view of (a), and (c) is a YY arrow view of (a). It is a figure which shows the structure of the gas insulated switchgear which concerns on 3rd Embodiment. (A) is a plan view, (b) is an XX arrow view of (a), and (c) is a YY arrow view of (a). It is a figure which shows the structure of the gas insulated switchgear which concerns on 4th Embodiment. (A) is a plan view, (b) is an XX arrow view of (a), and (c) is a YY arrow view of (a). It is a figure which shows the structure of the gas insulated switchgear which concerns on 5th Embodiment. (A) is a plan view, (b) is an XX arrow view of (a), and (c) is a YY arrow view of (a). It is a figure which shows the structure of the gas insulated switchgear which concerns on 6th Embodiment. (A) is a plan view, (b) is an XX arrow view of (a), and (c) is a YY arrow view of (a). It is a figure which shows the structure of the gas insulated switchgear which concerns on other embodiment, and is a figure which shows the other aspect of arrangement | positioning of the main bus-line. It is a figure which shows the structure of the gas insulated switchgear which concerns on other embodiment, and is a figure which shows the other aspect of the axial direction of the terminal of a circuit breaker. It is a single line connection diagram of the circuit configuration of the 11 / 2CB system. It is a figure which shows the structure of the conventional gas insulated switchgear of a 1 * 1 / 2CB system. (A) is a plan view thereof, and (b) is a view taken along the line XX of (a).

[1. First Embodiment]
[1-1. Constitution]
The gas-insulated switchgear according to the present embodiment is configured to be filled with an insulating gas such as SF ₆ gas and accommodate high-voltage charging units such as a circuit breaker, a disconnector, and a busbar in a metal container having a ground potential. Opening and closing device. Hereinafter, the configuration of the gas insulated switchgear according to the present embodiment will be described with reference to FIG.

FIG. 1 is a diagram showing a configuration of a gas insulated switchgear according to this embodiment. 1A is a plan view thereof, FIG. 1B is a view taken along the line XX in FIG. 1A, and FIG. 1C is a view taken along the line YY in FIG.

As shown in FIG. 1 (a), the gas insulated switchgear is a 1/1/2 type CB switchgear and includes a plurality of phase units A to C. One diameter is constituted by three phase units A to C. Here, the gas insulated switchgear includes two or more diameters, and the phase units A to C are connected in series.

Each phase unit A to C has first, second and third circuit breakers CB1 to CB3, disconnectors DS1 to DS6, branch buses T1 and T2, and a pair of main buses BB1 and BB2.

The first to third circuit breakers CB1 to CB3 (hereinafter also simply referred to as circuit breakers CB1 to CB3) have main shafts extending in one direction as shown in FIGS. 1 (a) and 1 (b). The circuit breakers CB1 to CB3 are devices that open and close the circuit by energizing or interrupting the circuit current when the contacts thereof contact and separate in the direction of the main shaft.

Breakers CB1 to CB3 have a pair of terminals TR-1 to TR-6 that are electrically connected to their contacts. Specifically, the circuit breaker CB1 has terminals TR-1 and TR-2, the circuit breaker CB2 has terminals TR-3 and TR-4, and the circuit breaker CB3 has terminals TR-5 and TR-6. Have. Terminals TR-1 to TR-6 have axes extending in one direction in a direction orthogonal to the direction of the main axes of circuit breakers CB1 to CB3. Terminals TR-1 to TR-6 are electrically connected to disconnectors DS1 to DS6 provided on both sides of the circuit breakers CB1 to CB3, respectively.

As shown in FIGS. 1A and 1B, the circuit breakers CB1 to CB3 are arranged in series in the direction of the main shaft so that the main shafts are located on the same straight line. In the present embodiment, the circuit breakers CB1 to CB3 are arranged such that the two legs provided on each of them are standing on a horizontal plane and the axial directions of the terminals TR-1 to TR-6 are oriented in the vertical direction. Yes.

The disconnecting devices DS1 to DS6 are devices for electrically isolating the circuit and releasing the voltage. The disconnecting devices DS1 to DS6 have shafts extending in one direction, the shafts are parallel to the main axes of the circuit breakers CB1 to CB3, and are provided on the upper sides of the circuit breakers CB1 to CB3. Terminals TR-1 to TR -6 is electrically connected to the circuit breakers CB1 to CB3. Specifically, disconnectors DS1 and DS2 are provided on both sides of breaker CB1, disconnectors DS3 and DS4 are provided on both sides of breaker CB2, and disconnectors DS5 and DS6 are provided on both sides of breaker CB3. Yes. The axial directions of the disconnectors DS1 to DS6 are orthogonal to the axial directions of the terminals TR-1 to TR-6.

The branch buses T1 and T2 are T-shaped buses and are arranged between the circuit breakers CB1 and CB2 and between the circuit breakers CB2 and CB3. That is, the branch bus T1 electrically connects the circuit breakers CB1 and CB2 through the disconnectors DS2 and DS3 at the left and right ends of the T-shape. The branch bus T2 electrically connects the circuit breakers CB2 and CB3 through the disconnectors DS4 and DS5 at the left and right ends of the T-shape. The remaining ends of the T-shapes of the branch buses T1 and T2 are electrically connected to the supply circuits F1 and F2. The supply circuits F1 and F2 are line-side circuits drawn out of the apparatus, and are power supply circuits that supply power to the apparatus. The supply circuits F1 and F2 are circuits connected to, for example, a transformer or a power transmission line.

A pair of main buses BB1 and BB2 are arranged in parallel with a circuit breaker row in which circuit breakers CB1 to CB3 are connected in series via disconnectors DS1 to DS6 and branch buses T1 and T2 for each of phase units A to C. It is electrically connected to disconnectors DS1 and DS6 located at both ends of the circuit breaker row. In this embodiment, as shown in FIG. 1 (a), the disconnecting devices DS1 and DS6 and the main buses BB1 and BB2 are parallel to each other, and therefore, between the disconnecting devices DS1 and the main bus BB1, and between the disconnecting devices DS6 and main bus BB1. Direct busbar connection portions TJ-1 and TJ-2 are provided between BB2 and electrically connected to each other. The direct bus connection T-J-1 connects the disconnectors DS1 and DS6 and the direct bus connection T-J-2. Direct busbar connection portion T-J-2 connects main busbars BB1 and BB2 and direct busbar connection portion T-J-1. As the direct busbar connection portions T-J-1 and T-J-2, T-shaped or L-shaped busbars can be used.

As described above, in each phase unit A to C, three breakers CB1 to CB3 and a pair of main buses BB1 and BB2 are connected in series via six disconnectors DS1 to DS6 and branch buses T1 and T2. The circuit is electrically connected to the two supply circuits F1 and F2, and the circuit breaker CB1 to CB3 controls the connection of the 11 / 2CB system.

Next, the arrangement relationship of each component will be described in more detail. As described above, the phase units A to C are arranged in a direction orthogonal to the direction of the main axes of the circuit breakers CB1 to CB3, that is, the extending directions of the circuit breaker rows and the main buses BB1 and BB2 are parallel to each other. They are arranged at a predetermined interval.

The circuit breaker rows are parallel to each other, and are arranged so that the main axes of the circuit breakers CB1 to CB3 of each phase are on the same plane. When this plane is the circuit breaker installation plane Y1, the circuit breaker installation plane Y1 is a plane on which the circuit breaker rows of the phase units A to C are arranged in parallel, and is a horizontal plane here.

The disconnecting devices DS1 to DS6 are arranged on the disconnecting device installation plane Y2, which is a plane parallel to the circuit breaker installation plane Y1. As described above, since the circuit breakers CB1 to CB3 are arranged with the terminals TR-1 to TR-6 facing vertically upward, the disconnecting devices DS1 to DS6 are arranged above the circuit breakers CB1 to CB3. The axes of the terminals TR-1 to TR-6 are parallel to each other and are located on the same plane. If this plane of each of the phase units A to C is defined as terminal surfaces A1 to C1, the terminal surfaces A1 to C1 are orthogonal to the horizontal plane and are parallel to each other as shown in FIG.

As shown in FIG. 1 (c), the pair of main buses BB1 and BB2 are arranged adjacent to both sides of the disconnecting devices DS1 to DS6 in parallel with the axes of the disconnecting devices DS1 to DS6. It is installed on the vessel installation plane Y2.

[1-2. Action / Effect]
(1) The gas-insulated switchgear according to this embodiment has a main shaft extending in one direction, and is provided on each side of the circuit breakers CB1 to CB3 and circuit breakers CB1 to CB3 arranged in series in the direction of the main shaft. The disconnectors DS1 to DS6, which are connected to the circuit breakers CB1 to CB3, and the adjacent circuit breakers CB1 and CB2 and circuit breakers CB2 and CB3 are connected via the disconnectors DS2 to DS5. Branch buses T1 and T2 connected to the circuits F1 and F2, parallel to the circuit breaker row in which the circuit breakers CB1 to CB3 are connected in series via the disconnectors DS1 to DS6 and the branch buses T1 and T2, and A plurality of phase units A to C having a pair of main buses BB1 and BB2 connected to disconnectors DS1 and DS6 located at both ends of the circuit breaker row are provided. The phase units A to C are arranged so that the circuit breaker rows are parallel, and the pair of main buses BB1 and BB2 are arranged adjacent to both sides of the disconnectors DS1 to DS6.

This can improve maintainability. In other words, in the conventional gas insulated switchgear, a circuit breaker row formed by connecting three circuit breakers in series is arranged in one place for three phases, and a pair of main circuit breakers are arranged on one side in parallel with the circuit breaker row. Since one of the buses is arranged together for three phases and the other main bus is arranged for three phases on the other side, the main bus and the disconnecting device of each phase are orthogonal to the circuit breaker row. The distance is arranged in the direction. Therefore, it was necessary to determine which main bus of the three is connected to which disconnector, but in this embodiment, the pair of main buses BB1, BB2 is divided into each phase, Since it is arranged adjacent to both sides of DS1 to DS6, such trouble can be saved. That is, since the main buses BB1 and BB2 are arranged close to the disconnectors DS1 to DS6, the connection relationship can be easily grasped by visual observation or the like, and the maintainability can be improved.

In the conventional gas-insulated switchgear, as described above, the main bus and the disconnecting device of each phase are arranged at a distance in the direction orthogonal to the circuit breaker row. Although it was necessary to provide a separate connection bus for connection, according to this embodiment, main buses BB1 and BB2 are divided into phase units A to C, and main buses BB1 and BB2 are adjacent to disconnectors DS1 to DS6. Therefore, there is no need to provide a connection bus bar. Therefore, the manufacturing cost can be reduced.

Furthermore, by arranging the main buses BB1 and BB2 adjacent to the disconnectors DS1 to DS6 for each of the phase units A to C, it can be modularized as the phase units A to C. Design and arrangement can be facilitated.

(2) The gas-insulated switchgear according to this embodiment is provided with a circuit breaker installation plane Y1 in which a circuit breaker row is arranged and a circuit breaker installation in which the circuit breakers DS1 to DS6 are arranged in parallel with the circuit breaker installation plane Y1. And the pair of main buses BB1 and BB2 are arranged on the disconnector installation plane Y2.

This allows the main busbars BB1 and BB2 to be installed at the same height as the disconnectors DS1 to DS6, thus reducing the overall height of the device and improving the earthquake resistance. That is, in the conventional gas insulated switchgear, the disconnector is arranged on the circuit breaker arranged in series on the ground plane, and from the viewpoint of securing insulation and reducing the installation space, the main bus for three phases is provided. In the case of arranging them together, the main busbar has to be positioned on the upper side of the disconnector, so that the height of the entire apparatus is high. On the other hand, according to the present embodiment, the main bus is divided and arranged for each phase, so there is no such restriction, and since the arrangement is made on the disconnector installation plane Y2, the height of the supply circuits F1, F2 As a result, the overall height of the apparatus can be reduced.

(3) The phase units A to C are arranged at predetermined intervals in a direction orthogonal to the extending direction of the circuit breaker row. Thereby, a space for maintenance, disassembly and inspection can be provided between the phase units A to C. In the conventional gas insulated switchgear, a space for moving the circuit breaker and the like is provided in the direction of the main axis of the circuit breaker, so that the size of the apparatus is increased in the direction of the main axis, and as a result, the main bus is lengthened. Since the phase units A to C are provided in the direction orthogonal to the direction to secure the space, there is no need to provide a space in the direction of the main shaft. Therefore, the main buses BB1 and BB2 can be shortened and the apparatus in the main shaft direction can be reduced.

[2. Second Embodiment]
A second embodiment will be described with reference to FIG. The second embodiment is the same as the basic configuration of the first embodiment. In the following, only differences from the first embodiment will be described, and the same parts as those in the first embodiment will be denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 2 is a diagram showing a configuration of a gas insulated switchgear according to the second embodiment. 2A is a plan view thereof, FIG. 2B is a view taken along the line XX in FIG. 2A, and FIG. 2C is a view taken along the line YY in FIG. 2A.

In the second embodiment, the disconnecting devices DS1 and DS6 at both ends of the circuit breaker rows of the phase units A to C are arranged so that the axial direction thereof is orthogonal to the extending direction of the circuit breaker rows.

This allows the disconnectors DS1 and DS6 at both ends of the circuit breaker row to face the main buses BB1 and BB2, so that the main buses BB1 and BB2 can be directly connected to the disconnectors DS1 and DS6. As a result, the direct bus connection portion T-J-1 that is necessary for connecting the main buses BB1 and BB2 and the disconnectors DS1 and DS6 becomes unnecessary. Since a plurality of gas-insulated switchgears are provided in a power plant or substation, and a plurality of direct busbar connection portions T-J-1 can be reduced with a single device, a great cost reduction effect can be achieved.

[3. Third Embodiment]
The third embodiment will be described with reference to FIG. The third embodiment is the same as the basic configuration of the first embodiment. In the following, only differences from the first embodiment will be described, and the same parts as those in the first embodiment will be denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 3 is a diagram showing a configuration of a gas-insulated switchgear according to the third embodiment. 3A is a plan view thereof, FIG. 3B is a view taken along the line XX in FIG. 3A, and FIG. 3C is a view taken along the line YY in FIG. 3A.

In the third embodiment, the terminals TR-1 to TR-6 of the circuit breakers CB1 to CB3 are horizontally inclined with respect to the first embodiment. That is, in the first embodiment, the breakers CB1 to CB3 are arranged with the axes of the terminals TR-1 to TR-6 oriented vertically upward, whereas in the third embodiment, the breakers CB1 are arranged. CB3 terminals TR-1 to TR-6 are arranged so that their axes are horizontal. In other words, the circuit breakers CB1 to CB3 are arranged so that the extending directions of the terminals TR-1 to TR-6 are parallel to the circuit breaker installation plane Y1. Further, disconnectors DS1 to DS6 are electrically connected to terminals TR-1 to TR-6 in parallel with the main shafts of the circuit breakers CB1 to CB3. Therefore, the disconnecting devices DS1 to DS6 are arranged on the circuit breaker installation plane Y1. That is, the disconnector installation plane Y2 is flush with the circuit breaker installation plane Y1.

Furthermore, since the axes of the terminals TR-1 to TR-6 are arranged so as to be horizontal, the terminal surfaces A1 to C1 on which the axes are located are the same horizontal plane. That is, the terminal surfaces A1 to C1, the breaker installation plane Y1, and the disconnector installation plane Y2 are the same common horizontal plane.

The pair of main buses BB1 and BB2 are arranged on both sides of the disconnecting devices DS1 to DS6 so as to sandwich the disconnecting devices DS1 to DS6 as in the first embodiment. In this embodiment, the common horizontal plane described above is used. On the other hand, one main bus BB2 is disposed above the disconnectors DS1 to DS6, and the other main bus BB1 is disposed below the disconnectors DS1 to DS6.

As described above, since the circuit breakers CB1 to CB3 are arranged so that the extending direction of the terminals TR-1 to TR-6 is not the vertical direction but the horizontal direction, the circuit breaker installation plane Y1 and the disconnector installation plane Y2 Are on the same plane. That is, since the installation height of the disconnecting devices DS1 to DS6 can be made the same as the height of the circuit breaker installation plane Y1, the overall height of the device can be further reduced. Therefore, the height of the building that houses the gas insulated switchgear can be reduced, and the construction cost can be reduced. Moreover, since the center of gravity of the entire gas insulated switchgear can be lowered, the earthquake resistance can be improved.

[4. Fourth Embodiment]
The fourth embodiment will be described with reference to FIG. The fourth embodiment is the same as the basic configuration of the third embodiment. In the following, only differences from the third embodiment will be described, and the same parts as those in the third embodiment will be denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 4 is a diagram showing a configuration of a gas insulated switchgear according to the fourth embodiment. 4A is a plan view thereof, FIG. 4B is a view taken along the line XX of FIG. 4A, and FIG. 4C is a view taken along the line YY of FIG. 4A.

The fourth embodiment is a combination of the third embodiment and the second embodiment. In other words, circuit breakers CB1 to CB3 are arranged so that the axes of terminals TR-1 to TR-6 are horizontal, and disconnectors DS1 and DS6 at both ends of the circuit breaker row of each phase unit A to C are in the axial direction. Is arranged so as to be orthogonal to the direction of the main axis of the circuit breakers CB1 to CB3. That is, the disconnectors DS1 and DS6 are arranged so that their axes are parallel to the vertical direction. The disconnector DS1 is directly connected to the main bus BB2 provided below the common horizontal plane of the terminal surfaces A1 to C1, the breaker installation plane Y1, and the disconnector installation plane Y2, and the disconnector DS6 is connected to the common horizontal plane. It is directly connected to the main bus BB1 provided at the top.

As described above, as in the second embodiment, the direction of the disconnecting devices DS1 and DS6 at both ends of the circuit breaker row is toward the main buses BB1 and BB2, so the main buses BB1 and BB2 and the disconnecting devices DS1 and DS6 are connected. Can be connected directly. As a result, the direct bus connection portion T-J-1 that is necessary for connecting the main buses BB1 and BB2 and the disconnectors DS1 and DS6 becomes unnecessary. Since a plurality of gas-insulated switchgears are provided in a power plant or substation, and a plurality of direct busbar connection portions T-J-1 can be reduced with a single device, a great cost reduction effect can be achieved. Therefore, according to the present embodiment based on the third embodiment, it is possible to obtain the effects of both the reduction of the manufacturing cost and the height of the apparatus.

[5. Fifth Embodiment]
The fifth embodiment will be described with reference to FIG. The fifth embodiment is the same as the basic configuration of the first embodiment. In the following, only differences from the first embodiment will be described, and the same parts as those in the first embodiment will be denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 5 is a diagram showing the configuration of the gas insulated switchgear according to the fifth embodiment. 5A is a plan view thereof, FIG. 5B is a view taken along the line XX in FIG. 5A, and FIG. 5C is a view taken along the line YY in FIG. 5A.

In the fifth embodiment, the phase units A to C are arranged so as to be shifted in the extending direction of the circuit breaker row. Therefore, in the first embodiment, the connection points connected to the supply circuits F1 and F2 of the branch buses T1 and T2 are arranged on a straight line perpendicular to the extending direction of the circuit breaker row, but in this embodiment, The phase units A to C are arranged such that the connection points of the branch buses T1 and T2 are relatively shifted in the extending direction of the circuit breaker row.

Specifically, the phase unit C has a predetermined distance in the direction of the main axis between the supply circuit F1 or the supply circuit F2 of the phase unit C and the supply circuit F1 or the supply circuit F2 of the corresponding phase unit B. The phase unit B is arranged so as to be shifted in the direction of the main axis. Similarly, the phase unit B is a phase unit in which the distance in the direction of the main axis between the supply circuit F1 or the supply circuit F2 of the phase unit A and the supply circuit F1 or the supply circuit F2 of the phase unit A corresponding thereto is a predetermined distance. It is displaced with respect to A in the direction of the main axis. This predetermined distance is such a distance that the lead-out line of the supply circuit F1 of the phase units A to C and the lead-out line of the supply circuit F2 of the phase units A to C do not overlap in the direction perpendicular to the extending direction of the circuit breaker row. .

According to the present embodiment, the connection points of the branch buses T1 and T2 with the supply circuits F1 and F2 are arranged in the phase units A to C so as to be shifted in the extending direction of the circuit breaker row. Even from A to C, the supply circuits F1 and F2 can be drawn from the connection point of the branch buses T1 and T2 perpendicularly to the direction.

That is, in the first embodiment, as shown in FIG. 1A, the supply circuits F1 and F2 of the phase unit B and the supply circuits F1 and F2 of the phase unit A are the supply circuits F1 and F2 of the phase unit C, In order to prevent the supply circuits F1, F2 of the phase unit A from becoming a physical obstacle, it is necessary to provide the supply circuits F1, F2 extending from the connection point of the branch buses T1, T2 in the extending direction of the circuit breaker row. It was necessary to provide dedicated supply circuits F1 and F2 for each of the phase units A to C. On the other hand, according to this embodiment, it is not necessary to provide the supply circuits F1 and F2 dedicated to the phase units A to C. Therefore, the supply circuits F1 and F2 can be unified, and the manufacturing cost can be reduced and further modularization can be supported.

[6. Sixth Embodiment]
The sixth embodiment will be described with reference to FIG. The sixth embodiment is the same as the basic configuration of the fourth embodiment. Hereinafter, only points different from the fourth embodiment will be described, and the same parts as those of the fourth embodiment will be denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 6 is a diagram showing the configuration of the gas insulated switchgear according to the sixth embodiment. 6A is a plan view thereof, FIG. 6B is a view taken along the line XX in FIG. 6A, and FIG. 6C is a view taken along the line YY in FIG. 6A.

The sixth embodiment is a combination of the fourth embodiment and the fifth embodiment. Also in this embodiment, as in the fifth embodiment, the phase units A to C are arranged so as to be shifted in the extending direction of the circuit breaker row. Therefore, the connection points of the branch buses T1, T2 of the phase units A to C with the supply circuits F1, F2 are not located on a straight line perpendicular to the extending direction of the circuit breaker row.

According to the present embodiment, as in the fourth embodiment, the height of the entire apparatus can be reduced, and the earthquake resistance can be improved. Further, since the direct bus connection portion T-J-1 is not necessary, the manufacturing cost can be reduced. Furthermore, since the phase units A to C are arranged relatively shifted in the extending direction of the circuit breaker row, it is possible to cope with further reduction in manufacturing cost and further modularization.

[7. Other Embodiments]
In the present specification, a plurality of embodiments according to the present invention have been described. However, these embodiments are presented as examples and are not intended to limit the scope of the invention. The above embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and gist of the invention.

(1) In the first embodiment, as a mode in which the pair of main buses BB1 and BB2 are arranged adjacent to both sides of the disconnecting devices DS1 to DS6, they are provided on the disconnecting device installation plane Y2, but this is not limitative. Not. The main buses BB1 and BB2 may be provided above the disconnector installation plane Y2, or may be provided below the disconnector installation plane Y2, as shown in FIG.

(2) The circuit breakers CB1 to CB3 are oriented in the vertical direction in the first embodiment and in the horizontal direction in the third embodiment. However, the present invention is not limited to these, and combinations thereof are also included in the scope of the present invention. That is, as shown in FIG. 8, the circuit breakers CB1 to CB3 may be arranged such that the axial directions of the terminals TR-1 to TR-6 are inclined with respect to the vertical direction or the horizontal direction. In this case, the main buses BB1 and BB2 may be provided below the disconnector installation plane Y2.

A to C: Phase unit
CB1 ~ CB3 ... circuit breaker
TR-1 to TR-6 ... Terminal
DS1 to DS6 ... Disconnector
T1, T2 ... Branch bus
TJ-1, TJ-2 ... Direct bus connection
F1, F2 ... Supply circuit
BB1, BB2 ... Main bus
A1 ～ C1… Terminal surface
Y1 ... Breaker installation plane
Y2: Disconnector installation plane

Claims (6)

First, second and third circuit breakers having a main shaft extending in one direction and arranged in series in the direction of the main shaft;
A disconnector provided on each side of each of the first, second and third circuit breakers, each connected to the first, second and third circuit breakers;
A branch bus connected to the supply circuit, and connecting each adjacent circuit breaker via the disconnector;
The first to third circuit breakers are parallel to the circuit breaker row connected in series via the disconnector and the branch bus, and are connected to the circuit breakers located at both ends of the circuit breaker row. A pair of main buses,
A plurality of phase units having
Each of the phase units is arranged so that each of the circuit breaker rows is parallel,
The pair of main bus bars are disposed adjacent to both sides of the disconnector,
Gas insulated switchgear. A circuit breaker installation plane on which the circuit breaker row is disposed;
The breaker installation plane that is parallel to the circuit breaker installation plane and in which the disconnector is disposed,
Have
The pair of main bus bars are arranged on the disconnector installation plane,
The gas insulated switchgear according to claim 1. The disconnectors at both ends of the breaker row are arranged so that the axial direction of the breaker is orthogonal to the extending direction of the breaker row,
The gas insulated switchgear according to claim 1 or 2. Each of the phase units is arranged at a predetermined interval in a direction orthogonal to the extending direction of the circuit breaker row,
The gas insulated switchgear according to any one of claims 1 to 3. The first to third circuit breakers are:
A terminal for connecting to the disconnector extending in one direction orthogonal to the main axis direction;
The extending direction of the terminal is arranged to be parallel to the circuit breaker installation plane,
Each of the disconnectors is disposed on the circuit breaker installation plane,
The gas insulated switchgear according to any one of claims 1 to 4. Each of the phase units is arranged shifted in the extending direction of the circuit breaker row,
The gas insulated switchgear according to any one of claims 1 to 5.

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