JPS61139205A - Gas insulated switchgear - 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 "Industrial Application Field" The present invention relates to a gas insulated switchgear in a customer's receiving equipment for receiving power supply from an electric power company.

``Conventional technology'' Gas-insulated substations are increasingly being used to replace conventional air-insulated substations in order to cope with increased power demand and land acquisition costs associated with urban overcrowding. It's coming.

In particular, for consumer power receiving equipment that receives power from electric power companies, a standard method was proposed in the "FFI Kyodo Research", and as a result of the progress in standardization, it is becoming easier to combine multiple component devices from the viewpoint of economic efficiency and aesthetics. A cubicle-type gas insulation gap device (hereinafter referred to as C-GIS), which is housed in a rectangular container, is increasingly being applied.

Figure 3 <a) and (b) show a C-GI using insulating fluid such as SF6 gas, which is a 112cB power-receiving type that is used as a regular standby twice.
FIG. 3 is a plan view and a front view showing an example of the arrangement of S.

C-G I S is used at a low pressure of 2k (If/a 11" or less) because the container is generally a flat combination structure and it is difficult to provide one that can withstand high pressure compared to a cylindrical container. There are many things.

In Figures 3(a) and (b), two power receiving switch boxes A are connected by a junction box B containing PCT, which is the property of the power company, and two load switch boxes are connected from the bus box C. It is branched to the other side and connected to the transformer 7r.

In Figure 2, which shows an example of the built-in equipment configuration of these boxes in a single-line connection diagram, the blocks A, BSC, and D surrounded by two-dot chain lines are the power receiving side switch box A, junction box B, and busbar box in Figure 3. C
and the load side switch box.

FIGS. 4 and 5 show specific structural examples of the A block and D block.

In block A of Fig. 4, a disconnector DS is connected to both sides of the circuit breaker CB, and a lightning arrester L is connected to the power receiving side.
A, current transformer CT is placed.

Furthermore, earthing switches ES are connected to both sides of the breaker CB and between the power receiving end and the disconnector DS.

The D block shown in FIG. 5 houses a disconnector DS and an earthing switch ES, and is connected to the transformer 7'r.

It may be connected to the transformer Tr via a cable.

In FIGS. 4 and 5, MCSMD and ME are operating mechanisms for the circuit breaker CB1 and the disconnector DS and the earthing switch ES, respectively.

When there is only one transformer T, the C block and the transformer Tr are directly connected without going through the D block, and the D block is unnecessary, so such a case is not covered by the present invention.

Furthermore, if there are three or more transformers, D blocks will be installed as many as the number of transformers Tr.

This configuration complies with the standard system for private power receiving equipment for ``special high voltage consumer power receiving equipment'' in ``Electric Kyodo Research'' Vol. 29, No. 4. Although the presence or absence of the lightning arrester LA and the current transformer CT, their installation positions, etc. may change depending on individual conditions, the components between the PCT and the transformer Tr do not change.

Examples other than the single-line connection diagram shown in Figure 2, in which the PCT and transformer Tr have the same equipment configuration, include a regular standby 1C13 power receiving/2 transformer, and a configuration in which a PCT is installed for each line. .

[Problem to be solved by the invention] In the conventional example as explained so far, the A block is
Lightning arresters LA, L, disconnectors CB, disconnectors DS.

Since a large number of devices such as the earthing device ES are stored, storing them in one container is suitable for making the whole device more compact, but the component of the D block is the disconnector D.
Since there are only one unit each of S and grounding device ES1, storing them in a rectangular container may actually impede compactness, which may ultimately impede economic efficiency, and there are a total of five blocks of A, B, and D. , are placed on mounts SA, 8B, and SD, respectively, as shown in Figure 3(b), which is uneconomical and takes up a lot of space, as well as prolonging the manufacturing and installation period. .

"Means for Solving the Problems" The present invention focuses on the fact that the D block has a simple configuration of one disconnector and one earthing switch, and replaces it with the conventional gas-insulated switchgear. By configuring it in a cylindrical container storage type similar to the container, the A block part is suitable for a box-shaped gas insulated switchgear, and the D block part is different in shape, suitable for a cylindrical container storage type gas insulated switchgear. By combining them, you can take advantage of their respective strengths.

Embodiment In FIG. 1 showing an embodiment of the present invention, the same components as those in the conventional example shown in FIGS. 3 to 5 are denoted by the same reference numerals and redundant explanations will be omitted.

In FIG. 1, the E block is composed of a cylindrical container, and a disconnector DS and an earthing switch ES are each independently inserted between the B block and the transformer Tr. In this case, the structure of a gas insulated switchgear that has been widely used in the past can be applied as is to both the disconnector DS and the earthing switch ES. In other words, the disconnector DS in FIGS. 6(a) and 6(b), the seventh
As shown in the earthing switch ES in Figures (a) and (b), the conductor portion 2 can be arranged in a triangular shape within the cylindrical container 1, so that a cylinder with approximately the same diameter as the C block in Figure 3 can be constructed. Not only can the container be applied and downsized, but it can also be made more economical, parts can be made more common, and the aesthetic appearance can be further improved.

In addition, it is also possible to house the disconnector DS and the earthing switch ES in one cylindrical container 3 as shown in Fig. 8(a) and (b), or if the bus bar portion and the container are integrated. , the number of containers is reduced, making it even simpler.

In these figures, Figure 116 (b), Figure 7 (b),
Figure 8(b), Figure 6(a) and Figure 7(a) respectively.
), the conductor portion 2 and the cylindrical container 1 in FIG.
FIG. 3 is a sectional view showing the relationship between FIG.

Moreover, if it is made into a cylindrical container, it is easy to make it resistant to high pressure.
It is also easy to set the gas pressure to more than kgf/cal.

In this case, the diameter of the container can be reduced, making it even more compact and economical.

"Effects of the Invention" The present invention creates and combines the power supply side part of the PCT suitable for the cubicle type and the load side part of the PCT suitable for the cylindrical container storage type, thereby leveraging the advantages of each. It has the characteristics of being able to provide a gas-insulated switchgear that is highly economical, economical, and easy to reduce, and has a good appearance.

In addition, a disconnector DS and an earthing switch ES on the load side from the PCT
By storing the gas insulated switchgear in one cylindrical container and integrating the equipment and the busbar container, it is possible to provide a more compact, reliable, and economical gas-insulated switchgear, as well as reduce the number of parts and reduce the gas Due to the reduction of the seal area,
Reliability can also be improved.

In addition, by increasing the pressure of the cylindrical container part, it is also possible to further improve downsizing, economical efficiency, common use of parts, etc.

[Brief explanation of the drawing]

FIG. 7 <a>, (1)) shows an embodiment of the present invention,
(a) is a plan view, (b) is a front view, Fig. 2 is a single line diagram showing the equipment configuration of the circuit, Figs. (b) is a front view, Figure 4 is a structural diagram of A block, Figure 5 is a structural diagram of Ia of C block. Figures 7 (a) and (b) are examples in which the earthing switch is housed in a cylindrical container, and Figures 8 (a) and (b) are examples in which the disconnector and earthing switch are housed in one cylindrical container. It is. Patent Applicant: Takagaku Seisakusho Co., Ltd. 2-11 Ki 1 Kuchi 13 5th 6th rg: J l *'1 Taichi ε5 叉茅 30 th>. /D5 C1,) C et al)

Claims (4)

[Claims] (1) Transaction meter current transformers that are the property of electric power companies (
In electrical equipment that consists of a power receiving switchgear (hereinafter referred to as PCT) and a power receiving switchgear that is the property of the consumer,
A plurality of electrical equipment elements up to the section are housed in a cubicle-shaped container based on a rectangular shape, and the PC
A gas insulated switchgear characterized by having a structure in which a disconnector and a grounding device between a T and a transformer are housed in a cylindrical container. (2) The gas insulated switchgear according to claim (1), wherein the gas pressure to be sealed is 2 kgf/cm or less. (3) Gas pressure in the cubicle-shaped part is 2kgf/cm
^2 or less, and the cylindrical container part is 2kgf/c
The gas insulated switchgear according to claim (1), characterized in that the gas insulated switchgear is configured so that the distance exceeds m^2. (4) Gas-insulated switchgear according to claims (1) to (3), characterized in that a disconnector and a grounding device between the PCT and the transformer are housed in one cylindrical container. Device.