JPS6062806A - Sealed switching device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a closed type switchgear. Closed type switchgear is
An insulating medium such as SF or S gas is filled and sealed at high pressure above atmospheric pressure, and internal components such as circuit breakers, disconnectors, and earthing switches are housed individually or in multiple types in a single cylindrical container. The enclosing device is constructed by connecting unit elements in sequence.

In addition, an insulating medium such as SF6 gas is filled and sealed at a low pressure near atmospheric pressure, and internal components such as circuit breakers, disconnectors, and earthing switches are stored all at once in a box-shaped container. Closed type switchgear has recently become possible due to improvements in the performance and reliability of each unit element, and is attracting attention as a more compact switchgear.

In the former case, using a cylindrical container, the mechanical strength of the container is high and there is little deformation due to differences in internal and external pressure, but the appearance is a collection of cylindrical shapes, which is not aesthetically compatible with the environment.
The downside is that the space factor is also poor.

The latter method uses a box-shaped container, which has a good appearance and space factor, but has the problem of being inferior in mechanical strength and having to be thicker than a cylindrical container to prevent large deformation due to the difference in internal and external pressure. There is.

Furthermore, in a closed type switchgear that is filled with an insulating medium other than air, it is necessary to evacuate the inside of the container prior to filling the insulating medium, and in this case, a force of 1 atmosphere is applied to the container in the direction of crushing. This one-piece container needs to have at least the strength to withstand the above pressure, and while there is almost no problem with the cylindrical container, with the box-shaped container, reinforcing ribs or beams may be added, or corrugated structures may be added. It is also necessary to perform bending processing to obtain a reinforced cross section and to use a single plate, which increases the cost and inevitably complicates the structure.

The present invention has been proposed in view of these points, and consists of storing internal components such as circuit breakers and disconnectors all at once in a single-circular container filled with an insulating medium and sealed, and combining the quadrilateral surfaces. The circuit breaker, the disconnector operating device, and other attached devices are housed in the gap between the two sides. The aim is to take advantage of the advantages of both, while also obtaining advantages that neither of them has.

The invention will now be described with reference to embodiments of the drawings.

In FIG. 1, a cylindrical container 1 is filled with an insulating medium such as SF6 gas at a predetermined pressure (for example, 4 atmospheres) and sealed, and is a circuit breaker OB shown in the single line diagram of FIG.

Internal components such as disconnector DS, earthing switch ESW, lightning arrester LA, current transformer OT, voltage detector VD, bus bar BUS, etc. are housed together. In Figure 1, the circuit breaker O
Only B is shown. 2 is a rectangular cover surrounding the cylindrical container 1. This cover 2 does not necessarily have to have an airtight structure, and in the case of outdoor equipment, it is sufficient as long as it protects the cylindrical container 1 from rain and snow. The material of the square cover 2 may be metal or non-metal. In the case of non-metallic materials, they do not rust and can be used for insulation safety and heat insulation properties. 3 is square cover 2
A conductor drawn from the air bushing attached to the ceiling plate 2a is guided into the cylindrical container 1 and connected to internal components. Cylindrical container 1, square cover 2
The bus bar BUS is insulated and led out from the side of the bus, and is configured so that it can be connected to adjacent equipment such as a transformer or other sealed switchgear, but this is not shown in the figure.

Therefore, there is a gap 4 between the cylindrical container 1 and the square cover 2.
For example, an operating device 5 for a circuit breaker OB or a disconnector DS is housed. This gap 4 may also accommodate other accessory devices, such as an operating power panel device having a relay or the like. Further, depending on the case, accessories such as the terminal processing portion of the external connection cable, the emergency parachute 6, the disconnector DB, and other manual operating device handles and lock pins may be stored. These may be suspended from the ceiling board 2a.

Furthermore, spare parts for internal components, such as spare lamps, fuses, spare gaskets, etc., may be stored.

In any case, the accessory device of the closed type switchgear is
It is stored in.

Note that 2b is a door formed on one side of the square cover. It is convenient if the operating device 5 is disposed at a position where it can be operated with the door 2b open.

However, a fixed accessory device such as the emergency battery 6 can be provided in the gap on the opposite side of the front door 2b.

Under normal conditions, the received electrical power is guided from the air bushing 6 to the bus bar BUS via the circuit breaker OB, and in the event of a failure, the circuit breaker OB is shut off, thereby functioning as a sealed switchgear without any problems.

FIG. 6 shows another embodiment, in which cable entry is performed. In the figure, 7 is a cable.

A cable head 8 penetrates the floor surface 2C of the rectangular cover 2 and is housed and fixed in the gap 4 between the bean paste and the cylindrical container 1.

Note that 9 is a pedestal. According to this configuration, since the cable is led in, an air bushing is not required, and the appearance is simple and compact. The lightning arrester LA may be taken out from the cylindrical container 1, suspended from the ceiling plate 2a, and stored in the gap above the cable head 8. Reference numeral 5' denotes an auxiliary box in which attached equipment such as gas system monitoring instruments and mechanical parts are housed. If the ceiling plate 2a is made removable, the cylindrical container 1 can be taken in and taken out from here, and the interior of the container can also be inspected from here.

FIG. 4 shows yet another embodiment, in which the cylindrical container 1 is arranged laterally inside. This configuration lowers the center of gravity and is advantageous as an earthquake-resistant structure, and the ceiling surface becomes wider, which can be used more effectively.

Fig. 5 In the embodiment of Hirobetsu, a spherical container 10 is used instead of a cylindrical container.
The figure shows the one using . According to this configuration, the relationship between the outer dimensions and the internal volume is further improved compared to the case of a cylindrical container, which is advantageous in terms of utilization of the internal space.

Note 1. In this embodiment, an intermediate panel is constructed between the door 2b and the rectangular cover, and meters are installed at the core, but the details are omitted. The intermediate panel may also be configured to be able to be opened and closed like the door 2b.

FIG. 6 shows another embodiment, in which the cylindrical container 1 is not brought into the completed box, but the plates 2 and 2 forming the surface are
A square cover 2, that is, an outer shell container, is created by surrounding the container with 2g. According to this configuration, the size of the stored items is not limited by the size of the opening (door 2b) provided in the plate body 2d.

FIG. 7 shows still another embodiment, in which when a plurality of containers are arranged side by side, only the side surface of the cylindrical container 1 is covered with plate members 2b, 2d,
It is surrounded by 2e and 2g. The number of plates can be increased or decreased as necessary, and in the case of a row-of-board configuration, only three or four sides need to be enclosed as shown in the figure. This can also be applied when one or more of the surfaces is a wall. According to this configuration, after the cylindrical containers 1 are interconnected, they can be surrounded by a plate, which facilitates the assembly work of the device.

FIG. 8 shows another embodiment using a round container 110 in the form of a beer dal (a combination of a cylindrical container and a conical container). 9th
The figure shows a cross-sectional view of the main part. This configuration is convenient for pulling out the bushing 3 diagonally to ensure air insulation distance. Furthermore, since the gap between the beer dal-shaped container 110 and the rectangular cover 2 is larger than in the case of the cylindrical container 1, more or larger auxiliary devices can be stored. Since the beer dal type container 110 can only constitute the necessary gas space, it can save gas, and the end plate can be made smaller and thinner, which is advantageous in terms of small size, light weight, and pressure resistance. The cylindrical part and the conical part are combined to form a biadal shape, and because of this, the wasted space can be reduced compared to the case where only the conical part is combined.

FIG. 10 shows yet another embodiment in which a circuit breaker OB, a disconnector 4DS, and a grounding device ΣSW are installed in a cylindrical container 120 in the form of a cylindrical case.
etc., and the bushing 3 connects the cable Oa to the drawer t. 5a is a link conversion mechanism section, which may be housed in the cylindrical container 120.

Although only one phase is shown in Figure 10, in reality the first
As shown in Figure 1, six phases are accommodated.

According to this configuration, it is possible to obtain an extremely high-density integration of the sealed structure P1. It's convenient for both parties.

FIG. 12 shows another embodiment in which the gas insulated transformer FT is housed in a conical round container 160, and the FT secondary terminal box density relay or gas It houses a gas control unit such as a pressure gauge, a valve, a gas charging/exhausting coupler, and other attached devices 5. This configuration is convenient when the gas insulated transformer is directly connected to the gas insulated cubicle 12 as shown in FIG.

FIG. 14 shows another embodiment in which the bus transformer PT1 is housed in a conical round container 140 and is provided at the end of a round container 150 for the bus BUS.

The circuit breaker OB is placed on the busbar container 150, and the single round container 16
0 is standing upright. 5a is the transformer PT10 secondary terminal box.

5b to 5d are circuit breakers OB, bus-side disconnectors DS1. The operating device of the cable side disconnector DS2 is shown. These operating devices 5b~
Cylindrical container 160 for 5d circuit breaker OB. They are each directly connected to the cylindrical containers 150 for the bus line BUS, and are positioned in the gaps 4 formed between these containers and the rectangular cover 2. Note that CH is a cable head. Figure 15 is the 14th
Shows a single line diagram of the one in the figure.

According to this embodiment, it is possible to obtain a gamma closed type switchgear with high density integration.

The square cover has a floor plate 2C and the other side has a side structure.
It is also possible to cover it from above.

In this case, if the ceiling plate 2a is supported on the top surface of the round container, the strength of the side surfaces of the support material or the square cover can be kept low and materials used can be saved.

The insulating medium filled in the round container may be liquid as well as gaseous.

As detailed above, according to the present invention, internal components are housed in a round container and filled with an insulating medium, so the container is less deformed due to pressure difference between the inside and outside, and can be made thinner than a rectangular container. It is lightweight, easy to manufacture, and has a good space factor. The overall appearance is square due to the square cover, which improves environmental harmony. Since the round container is protected by a square cover, it is not necessary to make it suitable for outdoor use so that it can withstand rain and snow, which is economical. Since the container is round, it can be made thin and lightweight while still maintaining mechanical strength that meets the specifications. Ancillary devices such as disconnector operators do not need to be designed for outdoor use, nor do they need to be covered. Flying objects during a typhoon are protected by the rectangular cover and do not directly impact the round container, so there is no risk of gas leakage due to deformation or damage, and the entire container can be effectively closed by locking the rectangular cover. This has the effect of preventing erroneous operation of the cover, and since it is a rectangular flat plate cover with no protruding parts, there is no risk of safety problems for the general public.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention, FIG. 2 is a circuit diagram showing an example of internal components housed in a round container, and FIGS. 3 to 7 are diagrams showing an embodiment of the present invention. FIG. 8 is a perspective view showing another embodiment; FIG. 9 is a side sectional view of the main part of FIG. 8; FIG. 10 is a side sectional view showing another embodiment. , FIG. 11 is a cross-sectional view taken along the line XI-XI in FIG. 10, and FIGS. 12 to 14 are perspective views showing other embodiments.
FIG. 15 is a circuit diagram of the circuit shown in FIG. 14. 1, IC1, 110, 120, 130, 140, 15
0,160... Round container 2... Square cover 4... Gap 5... Attached device Patent applicant Representative of Nissin Electric Co., Ltd. Ue 1) Ku - Yes 1 Figure)) r Z Figure bullet 3 Intoxication A 4 Kaisai 5 Okata 6 Tsukata 7 Fig. O 8 Fig. λ lO Bacterium rr Seno 12 Fig. O 13 Inkata 14 Fig. ln O 75 O

Claims (1)

[Scope of Claims] / Internal components such as circuit breakers and disconnectors are collectively housed in a sealed round container filled with an insulating medium, and accessory devices such as operating devices for the circuit breakers and disconnectors are housed. A closed type switchgear characterized by comprising: λ The closed type opening/closing device according to claim 1, wherein the round container is a cylindrical container. 3. The sealed opening/closing device according to claim 1, wherein the round container is a spherical container. The sealed opening/closing device according to claim 1, wherein the round container is a conical container. ! 2. The sealed opening/closing device according to claim 1, wherein the round container is a combination of two or more of a cylindrical container, a spherical container, and a conical container. (B) The closed type opening/closing device according to claim 1, wherein the round container is a container with a tray attached to a tube portion. Closed switchgear.