JPH04190605A - Electrical machinery and apparatus bus bar connector - Google Patents

Abstract

PURPOSE:To facilitate field assembly by fitting bent units to both sides of a linear unit insulated by coating and slidably in contact with the bent units at both ends and fitting the linear conductor of the bushing of a cubicle to one end of a bent unit. CONSTITUTION:Fitting-type slide contact parts 19 projected from both ends of a linear unit 14 comprising a linear conductor 20 coated with an insulator 21 are fitted to connection fittings 22 (the right half is not illustrated). Fitting- type slide contact parts 24 projected from both ends of an L-shaped bus bar conductor 26 are fitted to connection fittings 22 and 32. The bus bar conductor 26 coated with a semi-conductive rubber layer 27 and an insulating rubber layer 28 forms a bent unit 15. The fitting-type slide contact part 29 of a bushing 17 consisting of a bus bar conductor 28 and an insulator 31 is fitted to the connection fitting 32. The bushing 17 is connected to a bus bar 13 in a cubicle 11 filled with insulation gas beforehand in a factory. Thereby field assembly is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a busbar connection for electrical equipment, and for example, to a device for electrically connecting busbars of a cubicle housing a plurality of electrical equipment.

[Conventional technology] The conventional technology will be explained below with reference to the drawings.

FIG. 4 is an explanatory diagram showing the busbar connection of SF and gas-insulated electrical equipment. For example, gas-insulated circuit breakers, switches, etc. are housed in the cubicles 1 and 2, and these are connected by the busbar 3. It shows. To make the electrical connection in this way, first, the cubicles 1 and 2 are installed in a predetermined position, and then the bus bar 3 is connected via the spacer 4.
It is configured to be covered with a sheath 5 and a bellows 6 for airtight protection. Then, air is removed from the cubicles 1 and 2, and SF and gas 7 are filled in to a predetermined pressure to insulate the bus bar 3, which is at high voltage, the sheath 5, which is at ground potential, and the cubicles 1 and 2. be.

[Problems to be solved by the invention] By the way, with this conventional busbar connection method, it is necessary to evacuate the air inside the cubicle and fill it with SF or gas on site, which takes a very long time to complete the assembly. It will be. Furthermore, since assembly work inside the cubicle is required on-site, there is a high possibility that foreign matter such as dust may enter, which may cause a decrease in insulation performance.

This invention was made in view of these points, and it is possible to install a cubicle containing electrical equipment filled with SF and gas in advance at a factory, and to connect the busbars between them without the need for on-site gas filling work. The purpose of the present invention is to provide a new busbar connection device that can perform the following steps.

[Means for Solving the Problems] The present invention includes a linear unit provided with a fitting type sliding contact portion at both ends and covered with an insulating material, and a fitting type sliding contact portion provided at both ends that fit into the linear unit. A bending unit in which the outer periphery of an L-shaped busbar conductor is coated with a semiconductive rubber layer, an insulating layer, and a semiconductive rubber layer, and a fitting type sliding contact part at one end and a connecting part that connects the busbar in the cubicle at the other end. It consists of a linear or inverted-shaped busbar conductor with a bushing coated with an insulating material, and the busbar is assembled by fitting each of the above units into the bushing of a cubicle that houses gas-insulated electrical equipment in advance. 6 = [Function] For this reason, between cubicles containing electrical equipment, which are filled with SFs gas, which is an insulating gas, at the factory and installed at the site. The busbar connection allows air to be vented on site.

This allows the process to be carried out without the need for gas filling work. Moreover, with this structure, even if the installed cubicle is shifted by about ±10 mm in any direction, up, down, left, or right, it can be easily connected.

[Example] The present invention will be described in detail below based on the drawings. 1st
1 is a side view, partially in section, showing the configuration of an electrical equipment bus connection device according to an embodiment of the present invention. That is, electrical equipment is housed in the two cubicles 11 and 12 in advance in a factory, and an insulating gas such as SF6 gas is sealed therein. The cubicles 11 and 12 are installed next to each other, and are connected to [113 (only the left cubicle 11 is shown in the cross-sectional view) in each cubicle 11 and 12 by an inverted U-shaped busbar connection device 1o. The electrical connections are made by bushings 17, 18 having vertical busbars 28, respectively.

As shown in the exploded sectional view of FIG. 2, this busbar connection device 10 is composed of three units: one straight connection unit 14 in the center and inverted curved units 15 and 16 on both sides. .

The linear connection unit 14 is formed by covering a bus conductor 20 with a fitting type sliding contact portion 19 at both ends thereof with an insulator 21 . Connection fittings 22 made of an elastic member are fitted into the fitting type sliding contact portions I9 at both ends. The above-mentioned aiming unit 1-15° 16 has fitting type sliding contact portions 2 at both ends.
4 is formed by covering the outer periphery of the L-shaped bus conductor 23 with a semiconductive rubber layer 25 and an insulating rubber layer 26, and further covering this outer periphery with a semiconductive rubber layer 27, and the semiconductive rubber layer 27 is the L-shaped bus conductor 23.
It is constructed by extending into a cylindrical shape on both sides.

On the other hand, bushing 17.1 is attached to cubicle 11.12.
As shown in FIG. Constructed by covering. This insulating material 31 has a flange portion 31a formed in the center, and a cylindrical fixing fitting 34 is brought into contact with the cubicle 11.12 via a backing 36.
It is fixed airtight with bolts 35.

Bushings 17.1 between cubicles 11.12 using each unit 14, 15° 16 configured in this way
To connect the bus conductors 2 to 8, as shown in FIG.
0 and L-shaped busbar conductors 23.23 are connected by connecting fitting type sliding contact portions 19.24 with connecting fittings 22, respectively.

Bushings 17 and 18 are pre-installed at the factory using cylindrical fixing metal fittings 3.
4 and are attached to each cubicle 11.12 by bolts, and these busbar conductors 28 are connected to a busbar 30 in each cubicle 11.12. Next, the connecting device 1o connecting the bending unit 15.16 is fitted onto both sides of the busbar connection unit 14 from above the combined bending unit 1-15.16 to connect the L-shaped busbar conductor 23°2.
3 are respectively fitted into the fitting type sliding contact portions 29, 29 of the respective bus bar conductors 28, 28 of the bushings 17, 18 and connected by the connecting fittings 32. Then, the annular fixing metal fitting 33 is brought into contact with the flange portion 31a of the bushing 17.18, and the bushing 17.18 is airtightly fixed with the bolt 35 to the bushing 17.18 previously attached to the cubicle 11.12. and,
The center abutment part of the bending unit 15 and 16 is covered with a waterproof layer 37.
Cover and integrate.

Therefore, when connecting the busbars between the cubicles 11 and 12, which are filled with insulating gas and housed with electrical equipment, there is no need to fill in the insulating gas on-site, and the work efficiency is improved accordingly. Furthermore, since electrical equipment can be stored in cubicles in a clean environment at the factory, the reliability of the insulation properties is improved. Furthermore, the bending unit is elastically covered with a semi-conductive rubber layer, an insulating rubber layer and a semi-conductive rubber layer, and the connection with each bus bar of the straight unit and bushing is made with a fitting type sliding contact part with a margin. Therefore, it is possible to fully absorb a positional deviation of about 10 mm and install the device.

In the above example, two bending units 15 and 16 are used to connect the busbar, but the busbar conductor of the bushing of one cubicle is formed in an inverted shape, and a fitting type sliding plate is attached to the tip of the busbar conductor of the bushing of one cubicle. If a dynamic connection section is provided, it is also possible to similarly connect the busbars using only one straight unit and one bending unit.

[Effects of the Invention] As explained above, the electric equipment day line connection device of the present invention is configured to be assembled into a unit and its insulation as a solid insulator on-site, so that SF into the cubicle can be easily installed on-site. , it becomes possible to eliminate the work of filling gas, and the work efficiency is improved to a level F9, and the reliability of the busbar insulation characteristics is improved. In addition, the connecting device is divided into three units or two units, and the conductor connections are connected as mating sliding contacts, making the connection work reliable and easy. As a result, a certain amount of flexibility is obtained, so that positional deviations of up to about 10 mm can be absorbed when the cubicle is installed, and extremely excellent effects can be obtained in the workplace.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway side view showing the configuration of a busbar connection device according to an embodiment of the present invention, and the second section is a partial cross-sectional view showing the assembled state of FIG. FIG. 3 is a partial sectional view showing the assembled state of the bushing, and FIG. 4 is a line section for explaining the schematic configuration of a conventional busbar connection device. 10... Busbar connection device 11.12... Cubicle 14... Straight connection unit 15.16... Bent unit 17.18... Vertical unit 19.24.29... Fitting type sliding contact Part 20.23.
28.-11H wire conductor 21.31... Insulator 22.32... Connection fitting 25
．． 27...Semiconductive rubber layer 26...Insulating rubber patent applicant Hitachi Cable, Ltd.

Claims (1)

[Claims] A linear unit provided with a fitting type sliding contact portion at both ends and covered with an insulating material, and an L-shaped busbar conductor having a fitting type sliding contact portion at both ends that fits into the linear unit, the outer periphery of which is covered with a semiconductive rubber layer,
Straight or inverted L with a bending unit covered with an insulating rubber layer and a semiconductive rubber layer and a mating sliding contact at one end and a connection connecting to the busbar in the cubicle at the other end.
It consists of a letter-shaped busbar conductor and a bushing covered with an insulating material, and the busbars are connected by fitting and assembling each of the above units into the bushing of a cubicle that houses gas-insulated electrical equipment in advance. Characteristic electrical equipment busbar connection device.