JPS62196010A - Enclosed type bus - 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 [Technical Field of the Invention] The present invention relates to a sealed bus bar, and particularly to a sealed bus bar that allows the orientation of internal insulating spacers to be easily confirmed from the outside during or after assembly of the bus bar. It is related to the busbar.

[Technical Background of the Invention] Conventionally, a closed type switchgear containing an insulating gas such as SF&F2 gas in a metal tank has a closed type busbar connecting the individual devices such as a circuit breaker, a disconnecting switch, and an installation device. It is configured.

Fig. 3 shows a plan view of the main structure of this type of sealed busbar, and Fig. 4 shows a cross-sectional view of an example of the structure of a sealed busbar including an insulating spacer. be. Third
In the figures and FIG. 4, a bus conductor 1, which is a live part, is supported by an insulating support, for example, an insulating spacer 2, and is housed together with an insulating gas, for example, SFs gas, inside a metal tank 3 made of metal such as iron or aluminum. The flange of the metal tank 3 and the flange of the insulating spacer 2 are formed by connecting portions tightened with bolts at several locations. Further, this sealed bus bar is divided by an insulating spacer 2, and gas chambers 4 and 5 on both sides are connected to each other by external piping (not shown) or a drill hole provided in the bus conductor 1.
The gas pressure is maintained at the same level. Note that the shape of the above-mentioned insulating spacer 2 is a cone shape as shown in FIG.

``Problems with the previous technology'' However, there are the following problems with the closed busbar of the conventional configuration described above.In other words, the closed busbar that has been assembled in the state shown in Figure 4 is Since the orientation of the insulating spacer 2 inside the tank 3 cannot be visually confirmed from the outside, there is a problem that unnecessary time is required for attachment/detachment work during on-site emergencies and disassembly.

[Object of the Invention] The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a groove at the connection between the 7 flange of the metal tank and the insulating spacer. An object of the present invention is to provide a highly reliable sealed bus bar that allows the direction of an insulating spacer in a metal tank to be easily visually confirmed from the outside, thereby shortening the time required for attaching and detaching work.

[Summary of the Invention] In order to achieve the above object, the present invention arranges a bus conductor inside a metal tank filled with an insulating gas, and connects the bus conductor with insulating spacers arranged at predetermined intervals. In a device equipped with a supported connection part, a groove is provided along the circumferential direction on the outer circumference of the seven flange of the insulating spacer to clearly indicate the direction of the insulating spacer by the axial position, so that it can be easily used when assembling the bus bar or The present invention is characterized in that the orientation of the insulating spacer after assembly can be confirmed from the axial position of the groove.

[Embodiments of the invention] An embodiment of the present invention shown in the drawings will be described below.

FIG. 1 is a sectional view showing an example of the configuration of a closed busbar according to the present invention, and the same parts as in FIGS. 3 and 4 are designated by the same reference numerals. In FIG. 1, a bus conductor (not shown), which is a live part, is supported by an insulating spacer 2, and is housed in a metal tank 3 made of metal such as iron or aluminum together with an insulating gas, such as SF6 gas. The 7 flange and the flange of the insulating spacer 2 are formed by connecting portions tightened with bolts at several locations. In addition, the above-mentioned insulating spacer 2
The shape of the insulating spacer 2 is cone-shaped as described above, and a groove 6 is shown along the circumferential direction on the outer periphery of the 7 flange of the insulating spacer 2 to clearly indicate the direction of the insulating spacer 2 by its axial position. It is set up as follows.

In this case, the positions of W2C are in a positional relationship as shown in FIG. That is, if the plate thickness of the 7 flanges of the insulating spacer 2 is 1, and the center part of the plate thickness of the flange is 1/2, then the groove 6 provided on the outer periphery of the flange of the insulating spacer 2 is
By setting the axial position of the flange to the axial position excluding the central part of the thickness of the flange, within exactly 1/2, it is possible to determine the concave or convex direction of the cone of the insulating spacer 2. .

In a sealed busbar having such a configuration, at the connection portion between the flange of the metal tank 3 and the insulating spacer 2.

Since the groove 6 is provided to clearly indicate the concave or convex direction of the cone of the insulating spacer 2, the direction of the insulating spacer 2 inside the metal tank 3 can be easily confirmed visually from the outside during or after assembling the bus bar. can do. This eliminates unnecessary time spent on attaching and disassembling work during on-site emergencies and disassembly, as was the case in the past, and it is now possible to carry out the work accurately while significantly shortening the time required for attaching and disassembling work. Become. Also, since no special elements are added to confirm the orientation of the insulating spacer 2, the configuration of the sealed bus bar is not correct. 11! It is possible to obtain an extremely reliable closed type bus bar without causing male formation.

Note that the present invention is not limited to the embodiments described above, and can be implemented with various modifications without changing the gist thereof.

[Effects of the Invention] As explained above, according to the present invention, a bus conductor is arranged inside a metal tank filled with an insulating gas, and this bus conductor is supported by insulating spacers arranged at predetermined intervals. A groove is provided along the circumferential direction on the outer periphery of the flange of the insulating spacer to clearly indicate the direction of the insulating spacer by its axial position. It is possible to provide a highly reliable sealed busbar that allows the orientation of the spacer to be easily visually confirmed from the outside, thereby shortening the time required for attachment and detachment work.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional configuration diagram showing one embodiment of the present invention, FIG. 2 is a detailed diagram showing the positional relationship of grooves in the same embodiment, FIG. FIG. 4 is a sectional view showing an example of the configuration of a conventional sealed bus bar including an insulating spacer. 1...Bus conductor, 2...Insulating spacer, 3...Metal tank, 4.5...Gas empty, 6...Groove. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2

Claims (2)

[Claims] (1) A bus conductor is disposed inside a metal tank filled with an insulating gas, and the bus conductor is provided with a connecting portion supported by insulating spacers arranged at a predetermined interval, wherein the insulating spacer 1. A closed type busbar, characterized in that a groove is provided along the circumferential direction of the flange of the flange to clearly indicate the direction of the insulating spacer by its axial position. (2) Use a cone-shaped insulating spacer,
The closed busbar according to claim 1, further comprising grooves provided at axial positions other than the central part of the plate thickness of the flange.