JPH04197007A - Gas insulated closed distributor - 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] [Industrial application field] The present invention relates to gas insulated closed power distribution devices.

[Conventional technology]

Traditional closed switchboard busbar connections are made within the gas container or
The most common method was to connect by cable.

FIG. 5 shows an example of a busbar connection between closed switchboards. When connecting the closed switchboards 1a to the ICs using the busbars 2a to 2c, the backing 3a is attached with the closed switchboards 1a and 1b separated, and the flanges 4a and 5ba are attached using the ports 6a. Bus bars 2a and 2b are connected by a contactor 7a.

In the same figure, 3b is a backing, 4b and 5C are flanges, 6b is a bolt, 7b is a contactor, 8 is an insulator, and 9
is an insulator support.

[Problem to be solved by the invention]

When connected to closed switchboards, the weight of each closed switchboard is approximately 1500
It is difficult to assemble both closed switchboards because of the weight of about 100 kg, and this installation work sometimes leaves the inside of the gas container completely open, which poses a reliability problem. In other words, the present invention has been developed in view of the above points. The object of the present invention is to provide a gas-insulated closed power distribution device that makes it possible to minimize the risk of damage.

[Means to solve the problem]

The above purpose is to protrude bushings equipped with check valves from adjacent closed switchboards, operate the check valves on the busbars connecting the rows of panels, and connect the busbar chambers connecting the adjacent closed switchboards and rows of panels. This is achieved by making them the same gas compartment. In addition, a bushing equipped with a check valve is protruded from one of the adjacent closed switchboards, and a bushing with a non-return valve is protruded from the other closed switchboard, and the check valve is operated on the bus bar, and the bushing is connected to one of the closed switchboards. This is achieved by making the bus chambers that connect the panels into the same gas compartment, and partitioning the bus chambers for each panel.

[Effect]

Since the above means is provided, the gas filling operation during installation can be simplified.

〔Example〕

The present invention will be explained below based on the illustrated embodiments. 1st
An embodiment of the invention is shown in FIG. 2 and FIG.

It should be noted that the same parts as in the prior art have been given the same reference numerals, so their explanation will be omitted. In this embodiment, adjacent closed switchboards 1a, lb
Epoxy bushings 1 each provided with a check valve 10
1 protrudes, the check valve 10 is operated at the busbars 2A and 2B connecting between the row panels, and the busbar chambers (gas ducts) 12 and 13 connecting the adjacent closed switchboards 1a and 1b and the row panels are connected to the same gas. It was divided into sections. By doing this, it becomes possible to simplify the gas filling work during installation, and to obtain a gas insulated closed distribution W1 device that makes it possible to minimize the workability during installation. .

That is, an epoxy bushing 11 is provided with a through conductor 15 attached to the closed switchboards 1a and 1b via a backing 14.
is installed. The inside of the closed switchboard is shielded from the atmosphere by a packing 4.

The through conductor 15 has a through hole 6, is fitted with an O ring 17, is equipped with a check valve 10, a spring 18, and a presser plate 19 at its tip, and has a contact 20 attached thereto. The connection between the closed switchboards 1a and lb is made by means of gas ducts 12.13. A bus bar (conductor) 2 is connected to the gas duct 12 by an insulator 21.
A is attached, and a contact 22 is attached to the tip.

On the other hand, the gas duct 13 is connected to a conductor (bus) by an insulator 23.
2B is installed, and an O-ring 24 is attached to the tip of the gas duct.
is attached, and the gas ducts 12 and 13 have a structure that allows them to freely slide.

The electrical connection between the closed switchboard 1a and the closed switchboard 1b is made through the through conductor 15, the contact 20, the conductor 2A, and the contact 2.
2, the conductor 2B, the contact 20, and the through conductor 15.

In addition, the gas duct 12.1 connecting the closed switchboards
3 has a structure that is shut off from the outside air by the backing 25 and the O-ring 24, and the gas duct 12.13 is completely isolated from the outside air.
Close the switchboard 1a, lbl: When installed, push the check valve 10 away with the tips of the conductors 2A and 2B, and close it as shown in Fig. 2.
The state changes from a) to (b), and the structure is such that the gas in the closed switchboard passes through the through hole 16 and fills the gas duct 12.13. In addition, 26 in FIG. 1 is a conductor.

According to this embodiment, by attaching a bushing equipped with a check valve, when the closed switchboards are connected, by operating the check valve, the gas inside the closed switchboard is sucked into the gas duct. , the gas intake work during installation can be omitted.

Another embodiment of the invention is shown in FIG.

One of the epoxy bushings lla is a through conductor 15a without a through hole. By doing this, the gas in the gas duct 12.13 is supplied from the closed switchboard 1a, and is the same as the closed switchboard 1a, and the gas compartment can be separate from the closed switchboard 1b, and the gas compartment can be divided into one side or the other. By changing this bushing arrangement,
Gas compartments can be changed freely.

By combining bushings with and without check valves in this way, it is possible to freely divide the gas between closed switchboards.

Another embodiment of the invention is shown in FIG.

In this embodiment, the structure of the epoxy bushing 11 is made such that it can be attached to the cable head 27 in advance. By doing so, the cable head 27 can also be attached. That is, by inserting the cable head 27 into the U-shaped epoxy bushing 11, the closed switchboards 1a and lb can be connected.

By manufacturing a bushing to which the cable head can be attached in this way, the cable head can be attached and the cable head and gas duct can be used in common.

〔Effect of the invention〕

As described above, the present invention provides a gas-insulated closed power distribution device that can minimize the workability during installation and minimize the workability during installation. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of a busbar connection part of an embodiment of the gas-insulated closed power distribution device of the present invention, and FIGS. 2(a) and 2(b) show a check valve of the same embodiment. 3 and 4 are busbar connections showing different embodiments of the gas insulated closed power distribution device of the present invention, respectively. Longitudinal side view of, No. 5
The figure is a longitudinal sectional side view of a busbar connection section of a conventional gas-insulated closed power distribution device. 1 a, 1 b, 1 c - closed switchboard, 2A,
2B-=conductor (bus bar), 10... check valve, 11, ll
a...Epoxy bushing, 12.13.Gas duct (busbar room), 27..Cable head. Figure 3 Figure 4 Figure 5

Claims (1)

[Scope of Claims] 1. In a gas-insulated closed power distribution device including a bus bar connecting a plurality of gas-insulated closed switchboards, bushings each provided with a check valve protrude from the adjacent closed switchboards, Operate the check valve on the busbar connecting the row panels,
A gas-insulated closed power distribution device characterized in that an adjacent closed power distribution board and a busbar room connecting the row of panels are in the same gas compartment. 2. In a gas-insulated closed power distribution system equipped with a bus bar that connects a plurality of gas-insulated closed switchboards, a bushing equipped with a check valve is installed from one closed switchboard of the adjacent closed switchboards, and a bushing equipped with a check valve is installed from the other closed switchboard. The bushings of the check valves are each protruded, the check valves are operated on the busbar, and one closed switchboard and a busbar chamber connecting the row panels are made into the same gas compartment,
A gas-insulated closed power distribution device characterized by having a configuration in which a busbar room is partitioned for each panel. 3. The gas-insulated closed power distribution device according to claim 1 or 2, wherein the bushing is configured to be attached to a cable head.