JPS6143928B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a gas insulated switchgear, and particularly relates to a ring bus type gas insulated switchgear having a structure suitable for reducing the installation space. .

[Conventional technology]

The electrical connection state of a general ring bus type gas insulated switchgear is shown in the skeleton diagram of FIG. 1 is a gas tank disconnector, 2 is a disconnector, 3 is a grounding switch, 4 is a cable head, 5
is an instrument transformer, 6 is a current transformer, 7 is a bus bar,
The plurality of gas circuit breakers 1 are connected by a busbar 7, thereby configuring an O-ring busbar type gas insulated switchgear.

By the way, as shown in FIGS. 2 and 3, the arrangement of each device in a conventional gas insulated switchgear is similar to the commonly used double busbar system. That is, the gas insulated switchgear shown in FIG. 3 has a grounding switch 3 interposed in each part of the current transformer 6 and the disconnector 2 in the upper and lower electrical circuits from the vertical gas shield 1 and the disconnector 1.
An instrument transformer 5 is arranged above the cable head 4, and the cable head 4 is arranged in a straight line from the gas insulator and disconnector. As shown in Fig. 2, each of these gas insulated switchgears is arranged in two groups vertically symmetrically, with four units arranged side by side in one group. , the lower electric circuits are connected by the connection busbar 8, and the lower electric circuits of the gas-insulated switchgear on both sides of each group are connected as follows.
They are connected by the bus 7 via the auxiliary bus 7A to form a ring bus system. In addition, 1' is the operation part of the gas insulator and disconnector.

[Problem that the invention seeks to solve]

In the gas insulated switchgear of the ring busbar type configured in the above arrangement, since the linear parts are arranged in two groups, the installation area becomes large and the busbar 7 that connects the two groups has the disadvantage that it becomes long. Ta.

An object of the present invention is to provide a gas-insulated switchgear that can reduce the installation area and eliminate the need for a long bus bar.

[Means for solving problems]

In the gas insulated switchgear of the present invention, each tank of the gas insulated switchgear is arranged to face each other in the axial direction, and two groups of two sets are arranged horizontally in series, and a plurality of these are arranged in series according to the number of lines. Two groups of gas shields and disconnectors were installed in parallel arrays, and each tank had a current transformer, disconnector, and earthing switch arranged three-dimensionally at the two openings at the top, and were arranged horizontally. The two openings of the tank for each group of gas cylinders and disconnectors are connected in turn to the adjacent and perpendicularly opposing openings at the connection busbar via the disconnector, and the middle of the connection busbar is connected to the cable head. The outermost two tanks are arranged in series, and the remaining outlet parts are connected by a bus bar with a disconnector interposed between them to reach the cable head.

[Effect]

In this way, multiple sets of gas insulators and disconnectors are placed in parallel, with two tanks arranged horizontally in series, facing each other in the axial direction, and each device is arranged three-dimensionally at the outlet of each tank. , the adjacent and opposing openings of each tank are successively connected by a connection bus bar whose middle reaches the cable head;
Furthermore, since the outlet portions of the two outermost tanks are connected by the busbar to reach the cable head, the connection configuration of the ring busbar system can be simplified.

〔Example〕

The present invention will be explained in detail below using the embodiments shown in FIGS. 4 and 5. FIG. 4 is a plan view showing an embodiment of the gas insulated switchgear of the present invention, and FIG. 5 is a view taken along the line V-V in FIG. 1a is the tank of the gas tank and disconnector 1, 1b is the operation part of the gas tank and disconnector, and 1
c and 1d are openings formed in the tank 1a, respectively.

By the way, in the gas insulated switchgear of the present invention, as shown in FIG. 5, two tanks 1a of the gas shield disconnector 1 are arranged in series in each group horizontally, facing each other in the axial direction. As shown in Fig. 4, multiple sets of these are arranged in parallel according to the number of lines (in the example, two sets are arranged in series, and four sets are arranged in parallel) to form two groups. ing. The two openings 1c and 1d at the top of each tank 1a in each gas tank disconnector 1 are connected by three-dimensionally arranging a current transformer 6, a disconnector 2, and a grounding switch 3 above the openings 1c and 1d. are doing. Between the gas cylinders and disconnectors 1 of each group arranged in parallel, there is an outlet 1 of the tank 1a.
c and 1d are effectively used to connect the bus bar 7 to the shortest possible length. That is, the outlet portions 1c and 1d of the tank 1a of each gas tank breaker 1
A disconnect switch 2 is arranged and connected to the upper part of the tank via a current transformer 6, and a connection bus bar 8 connects each of the adjacent tanks 1a to one of the openings 1c facing each other in the right angle direction. or 1d, and connect the intermediate part of this connection bus 8 to a disconnector 2.
By connecting to the cable head 4 via the feeder, the feeder can be drawn out. Note that it is also possible to connect the potential transformer 5 to an appropriate space in this portion. In addition, the remaining outlet part 1c or 1d of the tank 1a in the two gas insulators and disconnectors 1 arranged in series, which are the outermost ones on both sides among the ones arranged in parallel, is the same as the other parts. It is designed to reach the disconnector 2 via the flow pipe 6, and has almost the same height as the cable head 4 for drawing out other feeders. The cable head 4 at the extended end of each bus bar 7 is connected to the cable head 4 at the extended end of each bus bar 7.

In this way, each of the two series gas shield disconnectors arranged in parallel is connected by the connecting bus bar 8 between the opposing openings 1c and 1d of the adjacent tanks 1a at the shortest distance. In addition, since the outlet portions 1c or 1d of the outermost tanks 1a arranged in series on both sides are connected by the busbar 7, and the cable head 4 is connected to the connection busbar 8 or the busbar 7, multiple horizontal By using arranged gas shields and disconnectors, a ring busbar type insulated switchgear can be easily constructed without significantly changing the structure.

Therefore, in the embodiment of the present invention, the installation area of the gas insulated switchgear can be reduced, and the gas insulated switchgear can be constructed without requiring a long busbar, generally in a building or an outdoor site.

〔Effect of the invention〕

As explained above, according to the gas insulated switchgear of the present invention, it is possible to configure a ring bus bar system without using vertical gas shields or disconnectors as in the past, and it can be manufactured without using a long bus bar. This has the effect of significantly reducing the installation area.

[Brief explanation of the drawing]

Fig. 1 is a skeleton diagram showing the electrical connection state of a general gas insulated switchgear, Fig. 2 is a plan view of the arrangement of each device of a conventional gas insulated switchgear,
3 is a view taken along the arrow line - in FIG. 2, FIG. 4 is a plan view showing an embodiment of the gas insulated switchgear of the present invention, and FIG. 5 is a view taken along the line V--V in FIG. 4. It is a diagram. 1... Gas tank disconnector, 1a... Tank, 1c,
1d... Outlet part, 2... Disconnector, 3... Earthing switch, 4... Cable head, 6... Current transformer,
7... Bus bar, 8... Connection bus bar.

Claims (1)

[Claims] 1. Two groups of multiple gas shields and disconnectors with current transformers interposed are connected in turn by connecting busbars through respective disconnectors, and the two groups are connected in a ring shape by busbars, and each of the above-mentioned In a device that connects a cable head via a disconnect switch by providing a grounding switch or the like at the connecting part of the connecting bus bar and the connecting part of the bus bar, the gas tank and the disconnect switch in each group are connected to each other by placing the tank horizontally. Two units are arranged facing each other in series in the axial direction, and a plurality of sets thereof are arranged in parallel, the tank of each gas shield and disconnector is provided with two outlet portions at the upper part, and a current transformer is arranged in each of the outlet portions. At the same time, a disconnect switch and a grounding switch are arranged and connected three-dimensionally, and the two outlets of each tank are connected by a connecting bus bar between one outlet part of the adjacent tank that faces each other in the right angle direction. The two outermost tanks on both sides, which are arranged in series, are connected by a busbar through a disconnector between the remaining outlets, and the connecting busbar connects the middle part to the cable head. A gas insulated switchgear characterized in that a cable head is connected to the extended end of the bus bar.