JPS6127966B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas insulated switchgear, particularly to the construction of a bus section switchgear unit in a double bus system.

Generally, gas insulated switchgear that adopts the double busbar system has gas insulated busbars arranged in a straight line and arranged almost in parallel, and the gas insulated switchgear unit for the feeder and the gas insulated switchgear unit for the bus tie are connected to the gas insulated busbar. It is placed on the side of the Especially in large-capacity gas-insulated switchgears, disconnectors are placed horizontally to improve earthquake resistance and to facilitate maintenance and inspection.

On the other hand, a gas insulated switchgear unit for a bus section that divides gas insulated busbars has a complicated structure because the gas insulated busbars to be divided are arranged on a straight line with their ends facing each other. Furthermore, the instrument transformer provided for each section of the gas-insulated bus bar complicated the overall configuration. The placement of the instrument transformer is easy because it does not matter at what level the instrument transformer is installed. Arranging the vessels is difficult and makes the whole thing complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gas insulated switchgear in which the overall height including the voltage transformer is suppressed and the structure of the bus section gas insulated switchgear unit is simplified.

The present invention is a device in which an instrument transformer is integrated with a bus section gas insulated switchgear unit.

The present invention will be explained below with reference to embodiments shown in the drawings.

FIG. 1 is a plan view showing the vicinity of a bus section gas insulated switchgear unit (hereinafter referred to as bus section unit) in a gas insulated switchgear.

The gas insulated main busbars 1 and 2 are linearly constructed three-phase integrated type, and are arranged facing each other on two parallel straight lines at substantially the same level. Both gas insulated main busbars 1, 2
are each divided into two parts in the illustrated part. between this gas insulated bus bar section 1a and 1b, and between 2
A and 2b are connected by bus section units 3 and 4, respectively.

The bus section units 3, 4 mainly consist of a gas shield disconnector 5, a gas insulated auxiliary bus bar 6, and a gas insulated connection conductor 7. The gas insulated auxiliary bus bar 6 is of a three-phase all-in-one type, and the others are of a phase-separated type. The configuration centered around the gas tank and disconnector is shown in Figure 2. Bus bar section 1a of gas-insulated main bus bar 1
and gas-insulated auxiliary busbar 6 are arranged in parallel on the same level, and gas-insulated disconnector 8 stands up above both busbars.
are provided respectively, and the opposing portions of these two are connected by a substantially horizontal gas shield and disconnector 5. On the other hand, the configuration centered around the gas-insulated connection conductor 7 is shown in FIG. A gas insulated connection conductor pipe 9 is provided standing up above the bus section 1b of the gas insulated main bus 1 and the gas insulated auxiliary bus 6, and the opposing portions between the gas insulated connection conductor pipes 9 are connected by a gas insulated auxiliary connection conductor 7. There is.

Bus section unit 3 with such a configuration,
No. 4 has an excellent seismic structure by suppressing the axial lengths of the gas insulated disconnector 8 and the gas insulated connecting conductor tube 9. The bus section units 3 and 4 are arranged on opposite sides of each gas insulated main bus bar 1 and 2. The positions of the gas insulated connecting conductor 7 and the gas insulated connecting conductor 7 are opposite to each other, that is, they are arranged so as to be rotationally symmetrical on both gas insulated main busbars. The reason for this will be explained next.

Six branch openings are formed upward in the busbar tubes of the gas insulated main busbars 1 and 2 connected to the gas shield and disconnector 5, and gas insulation for three phases is formed in every other opening. One end of the three-phase gas tank and the disconnector are connected via a disconnector 8 . In the remaining openings, voltage transformers 10 for each phase are arranged via gas insulated disconnectors or switching parts. As can be seen from FIGS. 1 and 2, the instrument transformer 10 is disposed on the opposite side of the gas insulated main buses 1 and 2 at substantially the same level as the gas shield disconnector 5. Therefore, the instrument transformer 10 projects to the side opposite to the gas-insulated main bus, but as described above, the position of the gas shield and disconnector 5 is not opposite to the gas-insulated main bus in the bus section units 3 and 4. Since they are arranged rotationally symmetrically with respect to the busbars, they are shifted differently in the axial direction, so that the voltage transformer 10 can reduce the overall distance between the gas-insulated main busbars 1 and 2 without increasing the distance between them. Height can be restricted.

The instrument transformers 11 on the gas insulated bus sections 1b and 2a are connected below the gas insulated connecting conductor 7 by utilizing the fact that it is located above as shown in FIG. In addition, in this instrument transformer 11, the gas insulated auxiliary bus bar 6 can be connected with six openings formed in the same way as the gas insulated main bus bar, or it can be connected as in other embodiments described later. So,
The connection position is not particularly limited.

On the other hand, the feeder gas insulated switchgear unit connects one end of the gas insulated main bus bars 1 and 2 to the gas insulated main bus bars 1 and 2, and is distributed on both sides of the gas insulated main bus bars 1 and 2. It is located.

In this way, a circuit as shown in FIG. 4 is constructed as a whole.

As can be seen from FIG. 1, the gas insulated switchgear is constructed on a generally rectangular installation surface as a whole.
The axial lengths of the gas shield disconnector 5 and the gas insulated connection conductor 7 in FIG. 1 can be shortened, thereby allowing the gas insulated auxiliary bus bar 6 to be brought closer to the gas insulated main bus bar side. .

FIG. 5 shows another embodiment, and the difference from FIG. 1 is that the gas-insulated connecting conductor 7 is of a three-phase all-in-one type.

The three-phase gas-insulated connection conductor 70 is connected between the gas-insulated auxiliary bus 6 and the gas-insulated main buses 1 and 2 at the same level. Therefore, the gas insulated connection conductor 70 is at a lower level than the gas insulated connection conductor 7 in FIG. 3, and the voltage transformer 11 is placed above the gas insulated connection conductor 70 as shown in FIG.
1, the overall height can be made comparable to that of the configuration shown in FIG.

In the embodiment shown in FIG. 5, the opposite ends of the gas insulated bus sections 1a and 2b are overlapped, and the gas insulated main bus 1 and
2 are arranged at approximately equal intervals in the axial direction of the gas-insulated main bus bar. Therefore, the axial lengths of the gas-insulated main busbars 1 and 2 required for the construction of the bus section units 3 and 4 can be shortened. Also in this embodiment, the potential transformer 11 can be provided at other positions.

As described above, the present invention provides gas insulated bus section 1
Six openings are formed at the ends of a and 2b, and one end of each phase's gas shield or disconnector placed almost horizontally is connected to every other opening, and the instrument transformer is placed almost horizontally to the remaining openings. 10, and a gas insulated disconnector 5, a gas insulated auxiliary bus bar 6, a gas insulated connection conductor 7,
Bus section units 3 and 4 consisting of 70 mags.
has the instrument transformer 10 of the gas-insulated main bus, and the part connected to one end of the gas shield and disconnector 5 is arranged rotationally symmetrically with respect to the axis of the gas-insulated main bus, so that the part is at a different position. In other words, the bus sections 3 and 4 are arranged on both sides of the gas-insulated main buses 1 and 2 so as to be asymmetrical with respect to the axis between the gas-insulated main buses 1 and 2, so that There is no need to increase the distance between the gas-insulated main busbars, and the overall height can be kept low. Furthermore, since the bus section unit and the instrument transformer are configured together, the overall configuration of the gas insulated switchgear can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a gas insulated switchgear according to an embodiment of the present invention, FIGS. 2 and 3 are side views taken along lines - and - in FIG. 1, and FIG.
The figure is a single-phase wiring diagram of FIG. 1, and FIG. 5 is a plan view of a gas-insulated switchgear according to another embodiment of the present invention. 1, 2... Gas insulated main bus bar, 3, 4... Bus section unit, 5... Gas shield breaker, 6...
Gas insulated auxiliary bus bar, 7... gas insulated connection conductor,
10...Instrument transformer.

Claims (1)

[Scope of Claims] 1. Two gas-insulated main busbars, each with the end portions of the gas-insulated busbar sections facing each other, are arranged facing each other on two parallel straight lines, and each of the gas-insulated busbars is located on the same straight line. The sections are connected using at least two sets of gas-insulated switchgear units for bus sections, each consisting of a gas insulation disconnector, a gas-insulated auxiliary bus, and a gas-insulated connection conductor, and the gas-insulated main bus is connected to the gas-insulated main bus. In the case where each bus section is equipped with a voltage transformer, the gas insulated auxiliary bus bar of each bus section gas insulated switchgear unit is 2.
A gas shield disconnector is provided parallel to the opposite side of each of the gas insulated main busbars arranged to face each other on a straight line, and connects one of the gas insulated busbar sections to one end of the gas insulated auxiliary busbar. is arranged almost horizontally, and the other gas insulated bus bar section and the other end of the gas insulated auxiliary bus bar are connected by a gas insulated connecting conductor, and the part connected to one end of the gas shield and disconnector is Six openings are formed above the busbar pipe of the gas insulated busbar, and every other three of these openings are used for connection to the gas shield and disconnector, and the remaining three of the openings are
An instrument transformer which is arranged approximately horizontally and protrudes between the two gas insulated main bus bars is connected to the two gas insulated switchgear units for the bus section.
By arranging both gas-insulated main busbars rotationally symmetrically, each connection by a gas shield or disconnector between the gas-insulated busbar section of the gas-insulated main busbar and the gas-insulated auxiliary busbar is aligned in the axial direction of the gas-insulated main busbar. A gas insulated switchgear characterized by having different characteristics. 2 In claim 1 above, the above 1
The bus section gas insulated switchgear unit of one set connects the gas insulated connection conductor opposite the gas shield and disconnector of the other bus section gas insulated switchgear unit. The insulated switchgear unit connects the gas insulated connection conductor opposite the gas shield and disconnector of the other set of bus section gas insulated switchgear units, and A gas insulated switchgear including a gas shield and a disconnector facing the gas insulated connection conductor. 3. In claim 1 above, the instrument transformer has a phase-separated configuration, in which the opposed portions between the gas-insulated bus bar sections of both the gas-insulated main buses are staggered to form a three-phase all-in-one configuration. Gas insulated switchgear arranged at approximately equal intervals in the axial direction of the gas insulated main bus bar.