JPH0245404B2 - SANSOITSUKATSUGATAGASUZETSUENKAIHEISOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a three-phase all-in-one gas insulated switchgear employing a ring bus system, and particularly to a conductor arrangement structure within a connecting bus bar that connects circuit breakers constituting the gas insulated switchgear.

FIGS. 1A and 1B show the arrangement of conductors in a conventional connection busbar of this type. The connection busbar 2 that connects the busbars 1 has a conductor 3,
4 and 5 are arranged, of which only the conductor 3 of one phase was arranged by moving its conductor position.
By the way, in such a structure, the conductors on the left side of FIG. 1B are arranged counterclockwise in the order of conductors 3, 4, and 5, but on the right side of FIG. Since the circuit breakers are arranged in the order of 4 and 5, the phase order is different for each circuit breaker, which has the disadvantage that problems may occur due to the phase order being different. Also,
As can be seen from the − cross-sectional view of FIG. 1A shown in FIG. 2, since the conductor 3 is at the position indicated by the solid line,
Normally, the insulation distance between the conductor and the metal container would be maintained if it was at the position shown by the dotted line, but because it is deviated from the position shown by the solid line, the insulation distance between the conductor and the metal container cannot be secured. There was also a drawback.

SUMMARY OF THE INVENTION An object of the present invention is to provide a three-phase gas-insulated switchgear that can eliminate the above-mentioned drawbacks, keep the phase order of each circuit breaker constant, and ensure the insulation distance of the connecting conductors.

The present invention arranges two-phase conductors among the three-phase conductors of a connecting bus bar that connects a plurality of circuit breakers constituting a gas-insulated switchgear by changing the circumferential position of the connecting bus bar. The above object is achieved by making the phase order of the phase conductors located in the cross section of the connecting portions at both ends the same for both connecting portions.

Embodiments of the present invention will be described below with reference to the drawings, using the same reference numerals for the same parts as those of the conventional example.

FIGS. 3A and 3B are diagrams showing the configuration of an embodiment of the three-phase all-in-one gas insulated switchgear of the present invention. 4
The circuit breakers 6, 7, 8, and 9 of the stand are connected in a ring shape by a connecting bus 10 and a main bus 11. The connection bus bar 10 has circuit breakers 6 and 7, 7 and 8, respectively.
8 and 9 are connected, and the main bus bar 11 connects the circuit breakers 6 and 9, and is fixed to the attached surface.

FIG. 4 shows an electric circuit of the ring bus type according to the above embodiment. That is, the four circuit breakers 6 to 9 are connected to each other by busbars, and the main busbar 11 is defined as the main busbar 11 on the shaft installed on the inner installation surface of these busbars.

Next, the conductor arrangement within the connection bus bar 10 of the above embodiment will be explained with reference to FIGS. 5A and 5B. Figure 5A
and B are schematic diagrams showing the arrangement of conductors in the connection busbar of the above embodiment. Conductors 13, 14, 1 on bus bar 1
5 are located at each vertex of an isosceles triangle, and these two generatrix lines 1 are connected by a connecting generatrix line 2. As shown in FIG. 5B, the conductor 13
is within the connecting bus 2, from position d in Fig. 6 to c
It moves three-dimensionally in the circumferential direction of the connecting bus bar 2 while ensuring the distance between the phases and the ground, and then returns from the position c to the position d. The conductor 15 is disposed within the connection bus bar 2 by moving from b to c to b in FIG. 6 in the same manner as the conductor 13. The conductor 14 is in the position a of FIG. 6 and does not move. FIGS. 7A and 7B show cross sections AA and B-B in FIG. It can be seen that this is the case. Although the above has been explained using schematic diagrams, the positions of the conductors are moved and connected within the coupling bus bar 10 of the embodiment shown in FIGS. 3A and 3B as shown in the schematic diagrams.

According to this embodiment, the conductors of two phases among the conductors connecting each phase are moved and arranged as shown in FIG. 6, so that the conductors shown in FIGS. In both figures, the conductor position is rotated counterclockwise so that 13,
14 and 15, the phase order is the same, and there is an effect of preventing troubles due to an incorrect phase order. Moreover, as can be seen from FIGS. 7A and 7B, each conductor 13, 14,
15 and the metal container which is the outer shell member of the connecting bus bar 2 can be secured.

FIG. 8 is a schematic explanatory diagram showing another embodiment of the present invention. In this example, the conductor is placed in front of the connection part.
It is rotated 90 degrees and connected between each circuit breaker. Figures 8B and C are the BB cross sections of Figure 8A.
As shown in Figure 8C, which is a cross-sectional view of -C, and Figure 8D, which is a cross-sectional view of D-D, the rotational order of the conductors 13, 14, and 15 is unchanged and the phase order is constant in any cross section. This has the same effect as the previous embodiment.

As described above, according to the three-phase gas-insulated switchgear of the present invention, the phase order of each circuit breaker can be made constant and the insulation distance of the connecting conductors can be ensured.

[Brief explanation of drawings]

Figure 1A is a vertical cross-sectional view showing an example of the conductor arrangement of a conventional three-phase gas-insulated switchgear, and Figure 1B is a
FIG. 2 is a cross-sectional view of FIG. 1 A, FIG. 3 A is a plan view showing an embodiment of the three-phase integrated gas insulated switchgear of the present invention, and FIG. 3 B is a cross-sectional view of FIG. 3A is a vertical cross-sectional view, FIG. 4 is a circuit diagram of the embodiment shown in FIG. 3A, and FIG. 5A is a vertical cross-sectional view schematically showing the conductor arrangement of the embodiment shown in FIG. 3A. FIG. 5B is a cross-sectional view of FIG. 5A, FIG. 6 is a cross-sectional view of the connecting portion of the conductor shown in FIGS. 5A and B, and FIG. 7A is a cross-sectional view of FIG. 5A. -A sectional view, Figure 7B is B-B of Figure 5A
8A is an explanatory diagram showing another embodiment of the present invention, FIG. 8B is a sectional view taken along line BB in FIG. 8A, and FIG.
Figure C is a sectional view taken along the line C-C of Figure 8A, and Figure 8D is a cross-sectional view of Figure 8A.
It is a DD sectional view of figure A. 1, 11...Bus bar, 2,10...Connection bus bar, 6,
7, 8, 9... Breaker, 13, 14, 15... Conductor.

Claims (1)

[Claims] 1. In a ring bus type three-phase gas insulated switchgear in which multiple circuit breakers are connected by a connecting bus bar, and the main bus bar is the one fixed to the mounting surface of the circuit breaker in the connecting bus bar, the outside of each bus bar is Two-phase conductors of the three-phase conductors are placed in a metal container such that the order of each phase of the conductor in each cross section in the same direction of the metal container is the same. A three-phase bulk gas insulated starting device characterized in that the three-phase gas insulated starting device is arranged in a metal container while changing its position in the circumferential direction.