JPS58130709A - Gas insulated switching device - 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 [Description of the Technical Field] The present invention relates to a gas insulated switchgear (2) used in a 4-way substation or a switchyard.

[Technical background of the invention and points of interest]

In recent years, the installation area of power generation and substations has been reduced,
For reasons such as improving safety, the electric appliances that make up the power generation and substation are housed in 42 grounded sealed containers filled with highly insulating gas such as gas on an 8F, and are insulated against the ground or with so-called correlative insulating stones. Gas insulated switchgear is adopted. In order to significantly reduce the site area, such gas-insulated switchgear can be constructed by arranging the 15R electrical equipment three-dimensionally or by storing the three-phase main bus in a three-dimensional container. The configuration is poor.

For example, a combination configuration of a main bus in a three-phase all-in-one configuration and each phase circuit in a single-phase unit that connects to the main bus The phase disconnector enclosures are also connected spaced apart from each other in rows, and the respective fixed contacts of each phase disconnector are connected to the respective corresponding phase main circuit conductors (both electrical and mechanical = connected, and the contactors of each phase are configured to be driven to open and close by the external ζ bifurcated operating mechanism of the disconnector container.In this way, #hZe
In the disconnection circuit C2, the three-phase ball circuit body bears the shock load applied to the solid contact and the electric current of the conductor itself during the opening and closing operation of the disconnection circuit. Therefore, insulating spacers are installed at both ends of the three-phase main bus bar and at least three places between the phases of the three-phase disconnector to firmly support the main circuit conductor of the main frame. It has a structure that can withstand electrical charges.

However, the amount of insulating spacer used in this area is
'A' which withstands the shock load generated when the disconnect switch operates *
i, and the number of pieces needed to withstand these loads. In addition, since a 3-wT circuit device for three phases is installed in contrast to the bead a (2), the dimensions of the relative arrangement of each phase disconnector are also urgent, and the purpose of the gas-insulated switchgear is This was also an obstacle to reducing the installation area.

[Purpose of the invention]

An object of the present invention is to provide a gas-insulated switchgear in which the overall size of the device can be reduced and the installation area can be significantly reduced by omitting or minimizing the number of insulating spaces +f that support the circuit conductors of the main bus bar. (There are two.

[The vine of invention]

The present invention relates to a gas insulated switchgear configured to omit as much as possible the insulating spacer that supports the circuit conductor at the bead edge, and to insulate and support the circuit conductor from a direction that withstands the impact load received during the WIA closing operation of a new circuit switch. It is something.

[Embodiments of the invention]

Hereinafter, the present invention will be explained in detail with reference to two examples. In FIG. 1 and FIG. Place the conductors 2a, 2b, 2c and around them 9
428F - Seals high insulation gas such as gas to maintain ground insulation and relative insulation. This three-phase soil volume @ Bus
The two disconnectors Da connected in series are made in a single-phase configuration. The disconnector containers 3a, 3b, 3a of each phase are connected to each other in each row (as shown in the figure) via two fins 4m, 4b, 4c.
Regarding the amount of soil - leakage connected to container 1, each phase of the new route container 3
M, 3B, 3CL will be installed, each new road 115m,
The fixed valley contactors 5be and 5c are connected to the corresponding main circuit conductors 2a, 2b, 2c E, electrically and mechanically (Region IIk), and the movable contacts of each phase are connected to the corresponding main circuit conductors 2a, 2b, 2c E, electrically and mechanically through operating rods 6m, 6b, 6a. container 3a + ab + 3
The opening and closing operations are performed by drive mechanisms 7m, 7b, and 7c provided outside of a. That ar #
From the sliding contacts 8a, 8b+8c of the M contactor, other equipment connected to the disconnector via the solar conductor supported by insulating spacers 9*69b*9c is connected to the container 3a, 3b,
3e is sealed with SF/gas insulating gas to ensure ground insulation and correlative insulation.

Since the disconnection mD8 in the present invention 12 has a vertical operation type-2 configuration, the impact load during the opening/closing operation is applied to each disconnection 1f.
2m of main circuit conductor for each phase from s4a, 4b, 4e.

2b, 2c4 will be added. Also, in the motherboard JiBm-, the distance 11 from the disconnectors DS to DB becomes relatively long, and the main circuit conductor 2a @ 2b e
The load on 2a also increases. Therefore, non-invention (= in
As shown in Figures 1 and 2, the main circuit conductor is 2 m long, without using expensive and large insulating spacers like in the past.
2b and 2e are reinforced with columnar insulators 10m, 10b, and 10c that are simple or have strong support strength (supported by biaxial edges to prevent shock loads during opening/closing operations that are applied to the main circuit conductors 2m, 2b, and 2c, and the impact load of the conductors themselves. The columnar insulators 10a, 1Ob, and 10c are provided at positions where the main circuit conductors 2m+2b and 2e are orthogonal to each other, and the respective phase disconnections - of the main circuit conductors 2m+2b and 2e are arranged in order to increase load-bearing efficiency.

〔Effect of the invention〕

As described above, according to the present invention, the portions of the main circuit conductors of the three-phase upper busbar where the disconnectors intersect are insulated and supported by columnar insulators (from the second point, the load applied to the main circuit conductors is sufficiently reduced). (-Compared to the conventional expensive and large insulating spacer, it is possible to shorten the disconnector spacing and the phase-to-phase dimension e2, making the overall configuration more compact and its installation easier.) It is possible to significantly reduce the amount of land required by 62 (-)
In addition, by omitting the insulating spacer, the amount of insulating material used can be reduced and the number of gas-tight seals can be reduced.

[Brief explanation of the drawing]

111 and 2 are gas insulated switchgears according to the present invention.
FIG. 2 is a vertical front view and a vertical side view showing an example of t.

Claims (1)

[Claims] (1) A three-phase live bus in which three-phase main circuit conductors are arranged in a 3-mm container, and a container for this main bus (1) and two disconnector containers for each phase are connected to each other at a distance from each other in each row. The new circuit section is connected to its corresponding main circuit conductor (two electrical and mechanical C), and the point C where the disconnect switch of the main circuit conductor of the main busbar intersects at right angles = the conductor is insulated and supported. (Two conductors 4 = gas insulated switchgear characterized by being provided with a columnar insulator that bears the applied load.