JPH08308044A - Gas insulated switchgear - Google Patents

Abstract

PURPOSE: To provide a gas insulated switchgear which can be easily unitized and contribute to the reduction in a substation space. CONSTITUTION: The VCB, DS and CT of unit circuits in a power receiving substation facility are formed in the composite unit of an integral structure. The composite unit is contained together with insulation gas in a metal vessel 11 partitioned to a unit chamber and the operating mechanism chamber of the periphery to form a composite apparatus unit 2. The unit 2 is so stacked with three stages at the rear in an outer box 1 and at the upper in a bus chamber 3, and at the front in a cable chamber 4. A bus 31 is wired in the chamber 3, connected to the unit 2, and insulation gas is sealed. A cable is laid in the cable chamber, and connected to the unit 2 via a cable connector 41. This structure is of a front type capable of installing on the wall, and a substation space is largely reduced, and the maintenance space of the unit and the operating mechanism is obtained.

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 in which a circuit type unit is constituted by a composite type device.

[0002]

2. Description of the Related Art With the goal of total gas insulation in substations,
Gas-insulated switchgear in the low voltage field has been gradually developed, and gas-insulated switchgear of ordinary high voltage class has already been manufactured. It aims to save space, improve safety, and harmonize with the environment. The conventional air-insulated closed switchboard structure is gas-insulated to reduce the size, and It has a configuration with additional equipment (disconnector).

As for the outer shape, instead of making the aerial two-tier product into a one-tier product, one surface is divided into right and left to have the same depth dimension as that of the thin cubicle, or the board width is the same as the conventional one. Narrow 2
Stacked structure, vacuum breaker (VCB), disconnecting switch (DS), etc. are arranged in one row in the depth direction, and the cable is laid on the door side to enable the same handling as a thin cubicle. ing.

What both have in common is that they are intended for transformer secondary circuits in gas-insulated cubicles that are installed adjacent to the wall to save space.

[0005]

A closed switchboard is a VC
Basically, it is composed of B, DS (disconnecting section for air type), CT, etc., and cable connection section for retractor or feeder, but the above gas-insulated cubicle is also a combination of the above equipment alone Since it is used as a block building system (BB
It is difficult to adopt S). That is, there is a problem that the constraint condition for reduction is large. Further, even if maintenance is made free by gas insulation, it is desired that the operation mechanism can be quickly and accurately maintained.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a gas-insulated switchgear which solves the above problems, is easy to unitize and maintain, and can reduce the space of a substation.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a composite type device in which a vacuum circuit breaker, a disconnector and a current transformer of a unit circuit in a power receiving and transforming facility are integrally structured, and a device room in which an insulating gas is sealed and a surrounding area. It is housed in a metal container that is divided into the operation mechanism room to configure a composite equipment unit, and the composite equipment unit is housed in an outer box with a closed busbar room at the rear and top, and a cable room at the front. The components of the vacuum circuit breaker and current transformer are arranged on one surface of the insulating base, and the components of the disconnecting switch are arranged on the other surface, and the insulation base is rotated by 180 ° to receive electricity. The feature is that it is a composite type device unit that can replace the feeding point.

The present invention also relates to a composite type device in which a vacuum circuit breaker, a disconnector, and a current transformer of a unit circuit in a power receiving and transforming facility are integrated into a device room in which an insulating gas is sealed and a peripheral operation mechanism room. The combined type equipment unit is housed in a metal container divided into two, while the PT and the lightning arrester are housed in the metal container for the combined type equipment unit to form an equipment unit with different functions. It is characterized in that a busbar chamber having a closed structure is formed in a rear portion and an upper portion in an outer box, and a cable chamber is formed in a front portion in a stacked manner.

Furthermore, the present invention is characterized in that the equipment room and the bus room of each equipment unit are provided as independent gas sections.

[0010]

[Operation] VCB, DS, and CT of the unit circuit have an integrated structure, and the metal container that houses them can be made small, and in combination with the front type, the substation space can be reduced. Can be achieved. In addition, since the unit is constructed using the same kind of metal container, BBS is used for stacking.
Can be adopted.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings.

Embodiment 1 of the gas insulated switchgear according to the present invention
Are shown in FIGS. The first embodiment is applied to a three-tiered feeder board, and by stacking the three-tiered composite equipment units 2 in an outer box 1 having a door on the front side, a busbar chamber 3 is provided in the rear and above the composite equipment unit 2. The cable chambers 4 are formed in each of them. The partition structure formed by stacking the composite equipment units is a sealed structure, and the bus chamber 3 is filled with a low-voltage insulating gas. The outer dimensions of the outer box 1 are such that the height is 2300 mm, which is the standard height of the closed switchboard, the width is 600 mm, and the depth is 930 mm.

As shown in FIGS. 1, 3 and 4, the composite type equipment unit 2 has an equipment chamber 11A in which a metal container 11 is hermetically sealed.
And a structure divided into an operation mechanism room 11B, for example, equipment room 11
One side and the bottom side of A are the operation mechanism chambers 11B. The inside of the equipment room 11A is divided into front and rear by an insulating base 12, and a VCB vacuum interrupter (VI) is provided on the front side thereof.
13 and a penetrating current transformer (CT) 14 on the rear side of the DS1
5 is installed as a composite type device with an integrated structure. That is,
The VI 13, CT 14, the ring contact 16, the insulating pad 17, the operating link 18, etc. are supported on the front surface side of the insulating base 12, and the link 18 is projected into the lower operation mechanism chamber 11B, while the fixing portion 15A of the DS 15 is provided. Movable part 15B,
Insulating base 19 such as insulating rod 19 and operating link 20
The link 20 is supported on the rear side of the operation mechanism chamber 11 below.
It is projected into B. The penetrating portions of both links 18 and 20 have an airtight structure. One insulating spacer 21 for each phase is attached to the front surface of the metal container 11, and the inner end portion of the center conductor thereof and the fixed lead of the VI 13 are connected by the connecting conductor 22. The insulating spacer 23 is attached to the inner end of the through conductor and the DS15.
The fixed portion 15A is connected by the connection conductor 24. A low-pressure insulating gas is enclosed in the equipment chamber 11A. Further, as shown in FIGS. 5 and 6, the insulating base 12 is provided with a plurality of ribs 12A on both sides in the vertical and horizontal directions.
I13, CT14, ring contact 16 and the like) are surrounded by ribs 12A in three directions. The links 18 and 20
The operation mechanism for VCB and the operation mechanism for DS connected to are omitted from the drawing.

A busbar 31 is housed in the busbar chamber 3 as shown in FIGS. 1, 3 and 4, and is connected to the composite equipment unit 2 by an insulating spacer 23. Further, the cable connection portion 41 is housed in the cable chamber 4 and is attached to the insulating spacer 21 portion of the composite equipment unit 2. Monitoring and control equipment (relays, meters, etc.) 42 is arranged on the door of the outer box 1. FIG. 7 shows a single-line connection diagram of the feeder board.

With such a structure, the VI of the unit circuit is
Since the VCB, CT14, and DS15 mainly consisting of 13 are a composite type device with an integrated structure, the metal container 11 in which this is housed can be small, and in combination with the fact that it is a front type substation. Space can be reduced.
Further, it is easy to unitize the composite type device, and BBS can be adopted when stacking. Moreover, since the maintenance space is secured on the front side, the equipment and the operating mechanism can be properly maintained.

Embodiment 2 is shown in FIGS. 8 and 9. Example 2 is a case where it is applied to a drawing board, and a single line connection diagram (FIG. 9)
As is clear from the figure, VC13 and CT mainly composed of VI13
In addition to 14, DS15, transformer current transformer (PCT) for instrument 5
1, a lightning arrester (LA) 52 and a DS 53 for LA are used. For this reason, the operation mechanism room 11C is formed in a part of the composite type equipment unit 5 and the metal container 11 for the equipment unit, and the other is used as the equipment room 11D, LA52, DS5 for LA5.
3. A unit 6 having a different function in which an instrument transformer (PT) 54 is housed together with an insulating gas is provided in the outer box 1 as the third and second stages, and the busbar chamber 61 is provided at the rear and upper portions, and the front. The cable chambers 62 are stacked so as to be formed in each section, and the PCT 51 is installed in the space of the first stage. However, in the composite type device unit 5 in this embodiment, it is necessary to reverse the arrangement of VCB, CT and DS in terms of the circuit configuration, and the one of the first embodiment is 180 ° centering on the insulating base 12.
It is rotated and installed. Also, PCT51, D
In order not to touch the cable between S15, a perforated iron plate or a wire mesh is appropriately installed.

Even when units having different functions are stacked in this manner, the metal container 11 is common, so that unitization (BBS conversion) is easy.

In the first embodiment, the three-tiered product is used, but the two-tiered product can also be used. In that case, the height dimension is less than the elevator mounting limit dimension (1900 mm), and the delivery cost is reduced. Can be reduced. Further, although the first embodiment is applied to the feeder board, it can also be applied to the power receiving board. However, in that case, the power supply direction is DS → VCB →
Since it becomes a bus bar, the composite type equipment is centered on the insulating base.
The installation state is the one rotated by 0 ° (the same structure as the uppermost unit in FIG. 8).

[0019]

As described above, according to the present invention, VCB,
Since the unit having the gas-insulated equipment chamber is configured by the composite equipment in which the DS and CT are integrated, the BBS can be adopted when the gas-insulated cubicle of the two-stage product or the three-stage product is constructed. In addition, since compound equipment units are stacked and a bus room with a sealed structure is formed in the rear and upper parts of the outer box, and a cable room is formed in the front, the equipment room and bus room of the compound equipment unit are gas-separated. Even if an accident should occur, it can be prevented from spreading. Moreover, because it is a front type that can be installed on the wall, it can greatly contribute to the reduction of substation space in combination with the compounding of equipment and the stacking configuration, and the maintenance of equipment and operating mechanism can be done on the front side space. It can be used easily.
Furthermore, in the case of the two-stage stacking method, it is possible to make it easier to carry in by setting the height below the elevator mounting limit dimension, and to store the transformer for the instrument and the lightning arrester in the same type unit box, so that a unit with different functions can be configured. There is.

[Brief description of drawings]

FIG. 1 is a configuration explanatory view (side view) showing a first embodiment of a gas insulated switchgear according to the present invention.

FIG. 2 is a front view of the first embodiment.

FIG. 3 is a configuration explanatory view (plane) of the first embodiment.

FIG. 4 is a cross-sectional view showing the structure of the composite type device unit in the first embodiment.

5 is a VCB of the composite type device unit in Embodiment 1. FIG.
The front view which shows an installation state.

FIG. 6 is a rear view showing a DS installation state of the composite equipment unit according to the first embodiment.

FIG. 7 is a single line connection diagram of the first embodiment (feeder board).

FIG. 8 is a structural explanatory view (side view) showing a second embodiment of the gas insulated switchgear according to the present invention.

FIG. 9 is a single line connection diagram of the second embodiment (drawing board).

[Explanation of symbols]

 1 ... Outer box 2 ... Composite equipment unit 3 ... Bus room 4 ... Cable room 5 ... Complex equipment unit 6 ... Different function equipment unit 11 ... Metal container 11A, 11D ... Equipment room 11B, 11C ... Operating mechanism room 12 ... Insulation base 13 ... VI 14 ... CT 15 ... DS 21 ... Insulation spacer (1 phase 1 piece) 23 ... Insulation spacer (3 phase batch) 31 ... Busbar 41 ... Cable connection part 51 ... PCT 61 ... Busbar room 62 ... Cable room

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[Procedure amendment]

[Submission date] August 3, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

As shown in FIGS. 1, 3 and 4, the composite type equipment unit 2 has an equipment chamber 11A in which a metal container 11 is hermetically sealed.
And a structure divided into an operation mechanism room 11B, for example, equipment room 11
One side and the bottom side of A are the operation mechanism chambers 11B. The inside of the equipment room 11A is divided into front and rear by an insulating base 12, and a VCB vacuum interrupter (VI) is provided on the front side thereof.
13 and a penetrating current transformer (CT) 14 on the rear side of the DS1
5 is installed as a composite type device with an integrated structure. That is,
The VI 13, CT 14, the ring contact 16, the insulating pad 17, the operating link 18, etc. are supported on the front surface side of the insulating base 12, and the link 18 is projected into the operation mechanism chamber 11B below, while the fixing portion 15A of the DS 15 is provided. Movable part 15B,
Insulating base 19 such as insulating rod 19 and operating link 20
The link 20 is supported on the rear side of the operation mechanism chamber 11 below.
It is projected into B. The penetrating portions of both links 18 and 20 have an airtight structure. One insulating spacer 21 for each phase is attached to the front surface of the metal container 11, and the inner end portion of the center conductor thereof and the fixed lead of the VI 13 are connected by the connecting conductor 22. The insulating spacer 23 is attached to the inner end of the through conductor and the DS15.
The fixed portion 15A is connected by the connection conductor 24. A low-pressure insulating gas is enclosed in the equipment chamber 11A. Further, as shown in FIGS. 5 and 6, the insulating base 12 is provided with a plurality of ribs 12A on both sides in the vertical and horizontal directions.
I13, CT14, ring contact 16 and the like) are surrounded by ribs 12A in four directions. The links 18 and 20
The operation mechanism for VCB and the operation mechanism for DS connected to are omitted from the drawing.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

With such a structure, the VI of the unit circuit is
Since the VCB, CT14, and DS15 mainly consisting of 13 are a composite type device with an integrated structure, the metal container 11 in which this is housed can be small, and in combination with the fact that it is a front type substation. Space can be reduced.
Further, it is easy to unitize the composite type device, and BBS can be adopted when stacking. Moreover, since the maintenance space is secured on the front side, the equipment and the operating mechanism can be properly maintained.

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 4

[Correction method] Change

[Correction content]

[Figure 4]

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

Claims (4)

[Claims] 1. A composite type device in which a vacuum circuit breaker, a disconnector, and a current transformer of a unit circuit in a power receiving and transforming facility are integrally structured is divided into a device room in which an insulating gas is filled and a peripheral operation mechanism room. Stored in a metal container to form a composite equipment unit,
A gas-insulated switchgear in which the composite equipment units are stacked in a box so that a bus room with a closed structure is formed in the rear and upper parts of the outer box and a cable room is formed in the front part. 2. The components of the vacuum circuit breaker and the current transformer are arranged on one surface of the insulating base, and the components of the disconnecting switch are arranged on the other surface, and the electric power can be received and the feeding point can be exchanged by rotating the insulating base by 180 °. 2. A composite type device unit.
Gas-insulated switchgear according to. 3. A composite type device in which a vacuum circuit breaker, a disconnector, and a current transformer of a unit circuit in a power receiving and transforming facility are integrally structured is divided into a device room in which an insulating gas is filled and a peripheral operation mechanism room. A composite type device unit is housed in a metal container, while an instrument transformer and a lightning arrester are housed in a metal container for the composite type device unit to form a device unit with different functions. A gas-insulated switchgear characterized in that a busbar chamber having a closed structure is formed in a rear portion and an upper portion in a box, and a cable chamber is formed in a front portion, respectively. 4. The equipment room and bus room of each equipment unit are independent gas sections.
Alternatively, the gas-insulated switchgear according to Item 3.