JPH11136819A - Gas insulation switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas insulation switchgear, which can be reduced in size and installation area by constituting the switchgear as a device for one circuit and, at the same time, can share the unit. SOLUTION: A bus-A grounding switch unit 32 having a bus-A conductor 1A and a grounding switch ES1, and a bus-B grounding unit 32 having a bus-B conductor 1B and a grounding switch ES2, are vertically arranged on one side of a bus dividing unit 31 having a disconnecting switch DS. In addition, a bus-A potential transformer unit 34 having a potential transformer PT1, and a bus-B potential transformer unit 35 having a potential transformer PT2, are vertically arranged on the other side of the unit 31. The bus-A conductor 1A is connected to the potential transformer PT1 through a branch conductor 2A and the bus-A conductor 14A and, at the same time, the bus-B conductor 1B is connected to the potential transformer PT2 through a branch conductor 2B and the bus-B conductor 14B. Then the conductors 14A and 14B are connected and disconnected to and from each other by means of the disconnecting switch.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas insulated switchgear used in a single-bus substation or the like.

[0002]

2. Description of the Related Art In general, a substation in the form of a single bus consisting of an A bus and a B bus is constructed as shown in a single-line diagram in FIG. That is, BUS1 and BUS2 are A bus and B bus, respectively, and A bus BUS1 has A bus
Bus-side grounding switch ES1 and A bus-side instrument transformer P
T1 is connected, and the B bus BUS2 is connected to the B bus ground switch ES2 and the B bus instrument transformer PT2. In addition, a disconnector DS for a bus division is connected between the A bus BUS1 and the B bus BUS2.

FIG. 3 is a plan view showing an example of a conventional gas insulated switchgear used in such a single-bus type substation. FIG. 4A is a side view showing a bus division and a B bus PT line. FIG. 4B is a side view showing the A bus PT line. The bus division unit 41 includes A buses BUS1 and B
The bus BUS2 and the disconnector DS for bus section are formed by being housed in a cylindrical metal container 57 filled with insulating gas. That is, the A bus conductor 51 connected to the upper insulating spacer 54 is a conductor on the A bus BUS1 side, and the B bus conductor 52 connected to the lower insulating spacer 55 is a conductor on the B bus BUS2 side. , The B bus branch conductor 53 connected to the right insulating spacer 56 is a conductor branched from the B bus conductor 52, and the A bus conductor 51
A disconnector DS is disposed between the power supply and the B bus conductor 52. The A bus conductor 51, the B bus conductor 52, and the branch conductor 53 have three phases arranged in a straight line or a triangular shape in the vertical axis direction.

The movable contact portion 58 of the disconnector DS is disposed in a direction perpendicular to the A bus conductor 51 and is fixed to the A bus conductor 51. The fixed contact portion 59 is a movable contact portion. It is arranged on the same straight line as 58 and is fixed to the B bus bar branch conductor 53. The movable rod 60 is slidably supported by the movable contact portion 58 and is supported by the insulating rod 6.
1 is connected to the opening / closing mechanism 62 via a main shaft 63 and to an operating device 64 arranged outside the metal container 57. Accordingly, in the disconnecting switch DS, the rotational movement of the main shaft 63 by the operating device 64 is converted into linear movement by the opening / closing mechanism section 62, and the movable rod 60 comes into and out of the fixed-side contact section 59 via the insulating rod 61 in three phases. By
Connection or disconnection between the A bus conductor 51 and the B bus branch conductor 53 is performed, and the A bus BUS1 and the B bus BUS are connected.
Two divisions are performed.

The bus segment unit 41 includes a B bus ground switchgear unit 43 and a B bus instrument transformer unit 4.
5 are connected to form a bus section / B bus PT line. The B bus ground switchgear unit 43 includes a B bus conductor 70 disposed on the same straight line and parallel to the B bus branch conductor 53.
And B disposed in a direction perpendicular to the B bus conductor 70.
The bus-bar-side grounding switch ES2 is formed by being housed in a cylindrical metal container 71 filled with an insulating gas.

The B bus-side grounding switch ES2 has a fixed contact portion 73 fixed to the B bus conductor 70, a movable contact portion 72 fixed to a metal container 71, and a movable contact portion 72 connected to a ground terminal. It is pulled out of the metal container 71 via 76 and grounded. The movable rod 74 is slidably supported by the movable contact portion 72 and is supported by the insulating rod 7.
5 is connected to the opening / closing mechanism 77 via a main shaft 78 and connected to an operation device 79 arranged outside the metal container 71. Accordingly, in the B-bus-side grounded switch ES2, the rotational movement of the main shaft 78 by the operation device 79 is converted into linear movement by the switching mechanism 77, and the movable rod 74 is connected to the fixed-side contact part 73 via the insulating rod 75 in a three-phase manner. , The grounding operation of the B bus conductor 70 is performed.

[0007] The transformer unit 45 for the B bus instrument connected to the B bus ground switchgear unit 43 includes a B bus conductor 70.
The transformer PT2 for the B bus side connected to the power supply is formed in a cylindrical metal container filled with insulating gas.

On the other hand, an A bus grounding switch unit 4 is connected to the bus division unit 41 via a connection bus unit 46.
2 and the A-bus instrument transformer unit 44 are connected to form an A-bus PT line. Connection bus unit 4
Reference numeral 6 denotes a three-phase A-bus conductor 81 connected on the same straight line to the A-bus conductor 51 and housed in a cylindrical metal container 82 filled with an insulating gas.

The A bus ground switchgear unit 42 connected to the connection bus unit 46 includes a cylindrical metal container in which an A bus conductor 83, an A bus branch conductor 84, and an A bus side ground switch ES1 are filled with insulating gas. 87 to be formed. That is, the A bus conductor 83 is connected to the A bus conductor 81 on the same straight line, the A bus branch conductor 84 is branched in a direction perpendicular to the A bus conductor 83, and the A bus ground switch ES1 connects the A bus conductor 83 to the A bus conductor 83. A busbar branch conductor 8 for grounding
4 is installed on the opposite side. In addition, 85 and 86 are insulating spacers. Further, the structure of the A bus-side grounding switch ES1 is the same as that of the B bus-side grounding switch ES2, and a description thereof will be omitted.

The A-bus instrument transformer unit 44 connected to the A-bus grounding switch unit 42 has an A-bus side instrument transformer PT1 connected to the A-bus branch conductor 84 in a cylindrical shape in which insulating gas is filled. It is formed by being stored in a metal container.

[0011]

In the above-mentioned conventional gas insulated switchgear, the bus division unit 41, the A bus and the B bus ground switchgear units 42 and 43, and the A bus and the B bus meter transformer unit 44 are provided. , 45 are arranged on the same horizontal plane, so that the device becomes large and the installation space becomes large. That is, a B bus PT line to which a B bus ground switchgear unit 43 and a B bus instrument transformer unit 45 are connected behind the bus division unit 41,
Since the A-bus grounding switch unit 42 and the A-bus PT line to which the A-bus instrument transformer unit 44 is connected are arranged next to the A-bus grounding switch unit 42, the device is a two-line device, and the device becomes large and the installation area increases. There is a disadvantage that. Further, since the A bus ground switchgear unit 42 and the B bus ground switchgear unit 43 are different in arrangement with respect to the bus division unit 41, they cannot have the same configuration, and it is difficult to share the units. is there.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a gas insulated switchgear which can be configured as a one-line device, can be miniaturized, can reduce an installation area, and can use a common unit.

[0013]

SUMMARY OF THE INVENTION According to the present invention, there is provided a gas insulated switchgear for use in a single-bus substation comprising an A bus and a B bus, the bus being formed by housing a disconnector in a metal container. A division unit, and an A-bus grounding switch unit formed and housed in a metal container containing the A-bus conductor and the A-bus-side grounding switch, and disposed on an upper portion of one side of the bus-dividing unit; A B-bus conductor and a B-bus-side grounding switch are housed and formed in a metal container, and a B-bus grounding switch unit disposed at a lower portion on one side of the bus segment unit; An A-bus-side instrument transformer unit is formed to house the A-bus-side instrument transformer, and is disposed above the other side of the bus-segment unit. A B-bus-side instrument transformer is provided in a metal container. Put the container And a transformer unit for a B-bus instrument disposed below the other side of the bus-segment unit, wherein the A-bus conductor and the A-bus-side instrument transformer are A-bus branch conductors. And the B bus conductor and the B bus side instrument transformer are connected via a B bus branch conductor, and the A bus branch conductor and the B bus
The disconnection between the bus bar and the conductor is performed by the disconnector.

In the gas insulated switchgear of the present invention configured as described above, the A bus ground switchgear unit and the A bus
The bus unit transformer unit, the B bus ground switchgear unit and the B bus line transformer unit are arranged vertically and the bus division unit is arranged between them, so that the apparatus is composed of one circuit and miniaturized. The installation area can be reduced. Further, since the A bus ground switchgear unit and the B bus ground switchgear unit are arranged in the same manner with respect to the bus division unit, commonality can be achieved.

[0015]

FIG. 1 shows an example of a gas-insulated switchgear according to an embodiment of the present invention. FIG.
(B) is a side view. On one side of the bus section unit 31 having the disconnector DS, an A bus ground switchgear unit 32 having an A bus BUS1 and an A bus ground switch ES1 and a B bus BUS2 and a B bus ground switch E are provided.
The B bus ground switchgear unit 33 having S2 is disposed vertically. On the other side of the bus section unit 31,
An A bus side instrument transformer unit 34 having an A bus side instrument transformer PT1 and a B bus side instrument transformer unit 35 having a B bus side instrument transformer PT2 are vertically arranged.

The A-bus grounding switch unit 32 includes an A-bus conductor 1A, which is an A-bus BUS1 for three phases, in a cylindrical metal container 6 filled with an insulating gas, and is parallel to the longitudinal axis in a straight line or a triangular shape. And fixed by insulating spacers 3 and 4. The A bus branch conductor 2A branched from the A bus conductor 1A and drawn out to the bus division unit 31 is fixed by the insulating spacer 5. The other lines on the A bus BUS1 side are connected to the A bus conductor 1A in the left direction via the connection bus 27.

On the opposite side of the A bus branch conductor 2A, an A bus ground switch ES1 is disposed. In the A bus-side grounding switch ES1, the fixed-side contact portion 7 is fixed to the A-bus conductor 1A, and the movable-side contact portion 8 is fixed to the metal container 6 via an insulator. It is pulled out of the metal container 6 via the ground terminal 11 and grounded. Also,
The movable rod 9 is supported in sliding contact with the movable contact portion 8, and is connected to the main shaft 12 via an insulating lever 10.
The main shaft 12 is pulled out of the metal container 6 and the operation device 1
3 is connected. Therefore, the A bus-side grounding switch ES
1 is that the rotary motion of the main shaft 12 by the operating device 13 is converted into linear motion by the insulating lever 10 and the movable rod 9 comes and comes in contact with and separates from the fixed-side contact portion 7 in three phases. Done.

On the other hand, the B bus conductor 1B, the branch conductor 2B and the B bus ground switch ES of the B bus ground switch unit 33 disposed below the A bus ground switch unit 32.
2 is exactly the same as the A bus conductor 1A, the A bus branch conductor 2A and the A bus side grounding switch ES1 of the A bus grounding switch unit 32 described above, respectively, and the description thereof is omitted. The other lines on the B bus BUS2 side are B
The bus bar 1B is connected to the right through a connection bus 28.

The bus section unit 31 is formed by housing a disconnector DS in a cylindrical metal container 16 filled with an insulating gas. The fixed-side contact portion 18 and the movable-side contact portion 17 of the disconnector DS each have three phases arranged in parallel to a straight line or a triangle, and have a B bus conductor 14B and an A bus branch connected to the B bus branch conductor 2B. It is fixed to A bus conductor 14A connected to conductor 2A. Movable rod 19 supported in sliding contact with movable-side contact portion 17
Is connected to a main shaft 21 via an insulating lever 20, and the main shaft 21 is connected to an operating device arranged outside the metal container 16. Therefore, the disconnecting switch DS converts the rotational movement of the main shaft 21 by the operating device into a linear movement by the insulating lever 20, and the movable rod 19 comes into contact with and separates from the fixed contact portion 18, whereby the A bus conductor 14A and the B bus conductor 14B Connection or disconnection with the A bus BUS1
And the B bus BUS2.

The A-bus instrument transformer unit 34 includes an A-bus conductor 14A in a cylindrical metal container filled with an insulating gas.
The A bus-side instrument transformer PT1 connected to is connected and formed. The B-bus instrument transformer unit 35 is formed by housing a B-bus side instrument transformer PT2 to which the B-bus conductor 14B is connected in a cylindrical metal container filled with an insulating gas.

[0021]

As described above, according to the gas insulated switchgear of the present invention, the A-bus grounded switchgear unit and the A-bus meter transformer unit, and the B-bus grounded switchgear unit and the B-bus meter transformer. The units are arranged one above the other, and the bus division unit is arranged between them, so that the apparatus can be configured with one line and the installation area can be reduced. Further, since the A bus ground switchgear unit and the B bus ground switchgear unit are arranged in the same manner with respect to the bus division unit, commonality can be achieved.

[Brief description of the drawings]

1 shows an example of an embodiment of a gas insulated switchgear of the present invention, wherein (A) is a front view and (B) is a side view.

FIG. 2 is a single-line diagram of a single-bus substation composed of an A bus and a B bus.

FIG. 3 is a plan view showing an example of a conventional gas insulated switchgear.

FIG. 4 is a front view of FIG. 3, wherein (A) is an A bus PT line,
(B) shows a bus division and a B bus PT line, respectively.

[Explanation of symbols]

 Reference Signs List 1A A bus conductor 1B B bus conductor 2A A bus side branch conductor 2B B bus side branch conductor 3 Insulating spacer 4 Insulating spacer 5 Insulating spacer 6 Metal container 7 Fixed contact portion 8 Movable contact portion 9 Movable rod 10 Insulating lever 11 Ground Terminal 12 Main shaft 13 Operating device 14A A bus conductor 14B B bus conductor 16 Metal container 17 Movable contact part 18 Fixed side contact part 19 Movable rod 20 Insulation lever 21 Main shaft 27 A bus side connection bus 28 B bus side connection bus 34 A bus Transformer unit for side instrument 35 B Transformer unit for bus side instrument DS1 Disconnector ES1 A bus side grounding switch ES2 B bus side grounding switch PT1 A bus side instrument transformer PT2 B bus side grounding switch

Claims (1)

[Claims] 1. A gas insulated switchgear used in a single-bus substation comprising an A bus and a B bus, comprising: a bus segment unit formed by housing a disconnector in a metal container; An A bus conductor and an A bus side grounding switch are housed and formed, and the A bus grounding switch unit disposed on an upper side of one side of the bus division unit; and a B bus conductor in a metal container. A B-bus grounding switch unit, which is formed to house the B-bus grounding switch, and is disposed at a lower portion on one side of the bus segment unit, and an A-bus-side instrument transformer in a metal container. A transformer unit for the A-bus instrument disposed on the other side of the bus-segment unit and a transformer for the B-bus instrument in a metal container. Together with the A transformer unit for a B-bus instrument disposed below the other side of the line-segmenting unit, wherein the A-bus conductor and the A-bus-side instrument transformer are connected via an A-bus branch conductor. Connecting the B-bus conductor and the B-bus-side instrument transformer via a B-bus branch conductor, and opening and closing the A-bus branch conductor and the B-bus branch conductor by the disconnector; A gas-insulated switchgear characterized by the above-mentioned.