JPS6223203Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is suitable for the 11/2 shingle disconnection system, and particularly relates to a gas insulated switchgear employing air insulation for the power transmission line lead-out and the main bus bar.

As shown in FIG. 1, each device of a gas-insulated switchgear that employs the 11/2-way disconnect system is located within a substation area. In FIG. 1, a power transmission line 1 is supported by an insulator 3 on steel poles 2, 2, 2, and is connected to drop-in wires 5, 5, and is connected to an overhead wire 4. It is connected. Further, in this type of 11/2 shunt disconnection system, the air-insulated main bus 6 is installed below the power transmission line 1 at an insulation distance H from the power transmission line 1, as shown in the figure.

Three sheath disconnectors 7A, 7B, and 7C are arranged in a straight line, and the sheath breaker 7A is connected to the bushing 1 via a disconnector 10 having a current transformer 8 and a grounding device 9.
1A is connected to the main bus 6 by a lead-out conductor 12A, and disconnectors 7A and 7B are connected by current transformers 8, 8 and a disconnector 10 as shown in the figure, and connected to the lead-out conductor 12B via a bushing 11B. It is connected to the power transmission line 1, and the shield breakers 7B and 7C are also connected by the current transformer 8 and the disconnector 10, and connected to the power transmission line 1 by the lead conductor 12C via the bushing 11C. The other end of 7C is a current transformer 8 and a grounding device 9
It is connected to the main bus bar 6 via a disconnector 10 having a disconnector 10 and a lead conductor 12D via a bushing 11D.

When the gas insulated switchgear thus arranged and configured is viewed from above, it is arranged as shown in FIG. 2, and its single connection diagram is shown in FIG. 3.

When the sheath disconnectors 7A, 7B, and 7C are arranged in almost the same straight line in this way, the power transmission line 1 coming out from the bushing 11B crosses the main bus 6, so the distance H between the power transmission line 1 and the main bus 6 must be sufficiently taken care of. It is necessary to maintain medium insulation. Therefore, the steel pillar 2 becomes taller. Moreover, the iron pillar 2 in the center is definitely required. Further, since the output is performed by bushing, the interphase insulation distance A shown in FIG. 2 is required between the same lines, but this distance A is wasted. Moreover, since the disconnectors 7 are arranged substantially on the same straight line, the installation dimension B in FIG. 1 becomes longer.

An object of the present invention is to provide a gas insulated switchgear that does not require the power transmission line and the main bus to intersect and can reduce the installation area of the equipment as much as possible.

The present invention will be described below with reference to embodiments shown in FIGS. 4 to 6. First, in Fig. 4, the same parts as in Figs. 1 and 2 are given the same reference numerals, but the feature of the arrangement of the present invention is that the three The disconnectors are arranged in sequence so that their axes are substantially parallel to each other, and are electrically connected in series, and the air-insulated main busbars connected via bushings are placed above the disconnectors, The main busbar and the power transmission line do not intersect.

That is, as shown in FIG. 4, the shear breakers 7A, 7B,
7C is placed. In the planar arrangement of this embodiment, only the T phase will be explained, and the explanation of the R phase and S phase will be omitted since they are arranged in the same way. The right end of the shield breakers 7A and 7B in the figure is the common conductor 13, and the left end of the shield breakers 7B and 7C in the figure is the common conductor 13.
Connect each with . As a result, three siya disconnectors 7
A, 7B and 7C are electrically connected in series. Further, a bushing 11A is connected to the left end of the shingle breaker 7A, and a bushing 11D is connected to the right end of the shingle breaker 7C. Further, one end of a branch conductor 14 extending parallel to and on the opposite side of the shingle breakers 7A, 7B is connected to the common conductor 13 connected between the shingle breakers 7A, 7B. A bushing 11B is connected to the other end of this branch conductor 14. On the other hand, the common conductor 13 connected between the sheath breakers 7B and 7C has these sheath breakers 7B and 7C.
Branch conductor 1 extending parallel to C and on the opposite side thereof
Connect one end of 4. A bushing 11C is connected to the other end of this branch conductor 14. As shown in FIG. 5 and FIG.
They are connected to an air-insulated main bus bar 6 arranged in a direction perpendicular to A, 7B and 7C via lead-out conductors 12A and 12D, respectively. In addition, the bushings 11B and 11C are connected to the power transmission line 1 disposed in the axial direction and on the opposite side of the respective sheath breakers 7A, 7B and 7C via lead-out conductors 12B and 12C, as shown in FIGS. 5 and 6. are connected to each other.

With this arrangement, the bushings 11A, 11D connected to the main bus bar 6.6 and the bushings 11B, 11C connected to the power transmission lines 1, 1 are located on the diagonal of the overall arrangement as shown in Fig. 4. Therefore, sufficient insulation distance can be maintained between each. Further, the dimension D in FIG. 4 of the present invention is somewhat larger than the conventional dimension C in FIG. 2, but the dimension E in FIG. 4 is much smaller than the conventional dimension B in FIG. 3.

In addition, since the power transmission line 1 does not intersect with the air-insulated main bus 6, air insulation distance in the height direction is not required.
The steel pillar 2 is lower than the conventional figure 1. Moreover, the central iron column 2 and its insulator 3 in FIG. 1 are no longer necessary.

As described above, according to the present invention, since the main bus bar and the power transmission line lead-out, which are air-insulated, do not intersect, the steel pole supporting the air conductor is lowered, and the insulator supporting the steel pole and the air conductor is approximately 2/3 That's enough. Furthermore, it has the advantage that approximately 60% of the area is required to install the device.

[Brief explanation of the drawing]

Fig. 1 is a layout side configuration diagram showing a conventional gas insulated switchgear, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a single connection diagram of Fig. 1, and Fig. 4 is a gas insulated switchgear of the present invention. 5, 6, and 7 are side views taken along lines LL, MM, and NN in FIG. 4, respectively. 1...Power transmission line, 2...Iron pole, 6...Main bus bar, 7
A, 7B, 7C...Shiya disconnector, 10...Disconnector,
11... Bushing, 13... Common conductor, 14...
...Branch conductor.

Claims (1)

[Scope of utility model registration request] For each phase, first, second, and third breakers are arranged in sequence so that their axes are substantially parallel to each other and are electrically connected in series; The first connecting the ipsilateral end of the breaker
a common conductor connected to the same side ends of the second and third shingle breaker, and a second common conductor connected to the opposite end of the first common conductor of the first shingle breaker. a first bushing, a second bushing connected to an end opposite to the second common conductor of the third shingle breaker, and a second bushing having one end connected to the first common conductor and connected to each of the shingles; a first branch conductor extending in parallel and opposite to the first branch conductor; a third bushing connected to the other end of the first branch conductor; and one end connected to the second common conductor and each of the bushings A second branch conductor extending parallel to and opposite to the disconnector, and a fourth bushing connected to the other end of the second branch conductor, the first and second bushings each having a The third and fourth bushings are connected to the air-insulated first and second main busbars arranged in a direction perpendicular to each of the bushings and the disconnectors, respectively, and the third and fourth bushings are A gas insulated switchgear characterized by being connected to first and second power transmission lines disposed on opposite sides of a disconnector.