JPS5915248B2 - Switching equipment arrangement method for air-insulated 3-breaker double busbar type switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of an air-insulated triple-breaker double-bus type switchgear installed in a substation or the like.

FIG. 1 is a single-line connection diagram of a three-breaker double-bus system, FIG. 2 is a layout diagram of a conventional electric device, and FIG. 3 is a detailed diagram showing one phase of FIG.

As shown in FIGS. 1 to 3, a gas insulated electrical device 9, which is a gas insulated switchgear, is arranged between a first bus bar 1 and a second bus bar 2, which are provided substantially in parallel. They are arranged on the same perpendicular line with respect to both the generatrix lines 1 and 2, respectively.

A bushing 61 serving as a power extraction portion provided between each switch unit 5 of each phase constituting the electrical device 9
a.

61b is also arranged on the same vertical line as the electrical devices 9 of each phase.

Therefore, the first leader wires 71a to 71c and the second leader wires 72a to 72c are first pulled up to the top in order to ensure insulation from the live parts of each electrical device 9 and the live parts of each lead wire. First support part 10 and second support part 11
Supported by

In this case, the first leader line 71 is connected to the first support part 1.
0, the electric devices 9 and the second bus bar 2 are pulled out in a direction perpendicular to the second bus bar 2 with a predetermined insulation distance between them.

Further, the second leader line 72 is passed from the second support part 11 to the upper part of the first leader line 71 in parallel with both the busbars 1 and 2, and is once placed on a surface other than the installation surface of each electrical device 9. After being supported by the provided third support part 12, the first
The upper part of the first bus bar 1 is pulled out in the vertical direction of the first bus bar 1.

However, in order to ensure insulation from other live parts, the lead wires in conventional electrical equipment are supported at a high position and then pulled out, or supported at a location other than the installation surface of the electrical equipment and then pulled out. There is.

For this reason, although gas-insulated electrical equipment has been miniaturized, it has had the disadvantage that it is not possible to reduce the support portion of the lead wire and the overall installation area of the electrical device and the support portion.

In this invention, each switch unit is arranged for each phase on a plurality of different diagonal lines intersecting two parallel bus bars, and the power extraction part of each phase is arranged on a different perpendicular line to the two bus bars. Ensure air insulation between each lead wire pulled out through the bushing provided in each power lead-out part and other live parts, reduce the support part of the lead wire, and reduce the support part of the electrical equipment and the lead wire. The purpose of this is to reduce the installation area.

FIG. 4 is a layout diagram of a switching device showing an embodiment of the present invention.

In the figure, 1 is the charged first busbar, 2 is the first
3 is a breaker disposed between the bus bars 1 and 2 in a direction perpendicular to the bus bars 1 and 2; 4 is a breaker at both ends of the breaker 3; These disconnectors are connected in series to the circuit breaker 3, and are arranged on both sides of the circuit breaker 3 on a diagonal line that intersects the circuit breaker 3.

Reference numeral 5 denotes a switch unit composed of the above-mentioned breaker 3 and two disconnectors 4 arranged on both sides of the above-mentioned breaker 30, and in the illustrated embodiment, three sets are connected to the bus bar 1, each for each phase. They are installed in series on different diagonal lines that intersect 2.

61a. A bushing 61b is disposed between the three switch units 5 of each phase, and one end thereof is connected to a connection position between the switch units 5.

62a to 62C 963a to 63C are the outermost switch units 5 of the switch units 5 connected in series.
This is a bushing for leading out the terminal provided in the terminal.

In addition, each of the above bushings 61a, 61b, 62a to 62
c, 63a to 63c are respectively arranged on different perpendicular lines to both the above-mentioned bus lines 1 and 2.

Reference numerals 71a to 71c are first lead wires connected to the bushing 61a of each phase, which are drawn out from the upper part of the second bus bar 2 in a direction perpendicular to the second bus bar 1.

Second lead wires 72a to 72C are connected to the bushings 61b of each phase, and are drawn out from the upper part of the first bus bar 1 in a direction perpendicular to the first bus bar 1.

81a to 81c and 82a to 82c are the bushings 62 mentioned above.
Connection wire connecting a to 62C563a to 63C and each corresponding phase of both the above bus bars 1.2, 9 is the above both bus bar 1,
This electric device is arranged for each phase on different diagonal lines that intersect the two, and is composed of the three switch units 5 and bushings 61, 62, and 63.

According to the present invention, each bushing of each power outlet between each switch unit is arranged on a diagonal line that intersects two parallel bus bars, and is also arranged on a different perpendicular line to both bus bars. Therefore, even if the lead wires are directly drawn out from each bushing in a direction perpendicular to both branch lines, the insulation distance between each of the lead wires which are insulated in air and from other live parts of the electric device is maintained.

Therefore, there is an effect that the supporting portion of the leader wire is reduced and the total installation area of the electrical device and the supporting portion is reduced.

[Brief explanation of the drawing]

Fig. 1 is a single line diagram of an electrical device, Fig. 2 is a layout diagram of a conventional electrical device, Fig. 3 is an overview diagram showing one phase, and Fig. 4 is an electrical device showing an embodiment of the present invention. It is a layout diagram. In the figure, 1 is a first busbar, 2 is a second busbar, 3 is a breaker, 4 is a disconnector, 61 to 63 are bushings, 71 is a first leader line, 72 is a second leader line, 81. 82 is a connection line. The same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A switchgear having lead-out terminals at both ends arranged between first and second busbars of a plurality of phases provided substantially in parallel and connected to each phase of the busbars in correspondence with each other. , a breaker arranged substantially parallel or perpendicular to the above-mentioned busbars, and at least two disconnectors arranged on both sides of the breaker on a diagonal line intersecting the breaker, and each connected in series to the breaker; A plurality of switch units consisting of a power switch and a switch are connected in series, and a plurality of power lead-out portions are provided between the plurality of switch units, and each phase is connected approximately on a line of a plurality of different diagonal lines intersecting the above-mentioned both bus bars. The air-insulated triple breaker double bus type switchgear is characterized in that the plurality of switch units and power draw-out portions are arranged respectively, and the power draw-out portions of each phase are arranged on different perpendicular lines with respect to the bus bar. How to arrange opening/closing equipment. 2. The method for arranging switching equipment for an air-insulated three-breaker double-busbar type switchgear according to claim 1, wherein the switch unit is filled with an insulating gas. 3. The air conditioner according to claim 1 or 2, characterized in that the power draw-out part is constituted by an air bushing having one end connected to a point where each switch unit is connected to each other. Switching equipment arrangement method for medium-insulated three-breaker double-bus type switchgear. 4. A switching device of an air-insulated three-breaker double-busbar type switchgear according to any one of claims 1 to 3, characterized in that the lead-out terminal portion is constituted by an air bushing. Placement method.