JPH01286705A - Gas insulated switchgear - Google Patents

Abstract

PURPOSE:To eliminate an extensible conduit and to reduce in size a gas insulated switchgear by attaching all shut-off block and line side blocks directly to a common base and aligning their heights when a plurality of gas insulated switchgear units are associated. CONSTITUTION:A plurality of gas insulated switchgear units 10a-10c (only 10a is shown in the figure) formed by combining a shut-off block 12a, a main bus block 12b and a line side block 12c are disposed perpendicularly to paper surface to form a unit. The bottoms of the block 12a, 12c of each unit are attached directly to a common base 11, and the heights of the centers of conduits 17a, 17b of the blocks 12b of the units 10a-10c from the base 11 are equalized. Thus, an extensible conduit is eliminated in the unit, the extensible conduit is used only at the conduit connection part to other unit to be easily associated and reduced in size.

Description

[Detailed description of the invention] A. Industrial application field The present invention relates to improvements in gas insulated switchgear.

B0 Summary of the Invention The present invention provides a gas insulated switchgear constructed by connecting a plurality of gas insulated switchgear units consisting of a breaker block provided with a breaker operating device outside the breaker tank, a main bus bar block and a track side block. In the equipment, a predetermined number of gas insulated switchgear units are attached to a single base to form a single unit, multiple unit units are connected to form a gas insulated switchgear, and the cutoff tank is directly fixed to the base to form a single unit. Inside, the installation height of the conduits connecting each unit is made the same, eliminating the need for an expandable conduit for connecting each unit, and reducing the installation space.

C1 Prior Art First, the connection state of a gas insulated switchgear unit (hereinafter simply referred to as a unit) will be explained based on FIG. Although the figure shows the connection per single wire, each unit is provided with three phases. There are also two main buses la and lb, one of which is the main line and the other is an auxiliary line used for emergency use in the event of a power outage or the like. In the figure, 2 is a breaker, 3 is a current transformer, 4 is a cable head for connecting to a load, 5 is a lightning arrester, 6 is a voltage transformer, 7a to 7C are grounding devices, 8
a to 8d are disconnectors.

Next, a gas insulated switchgear (hereinafter simply referred to as the device) consisting of a unit with such wiring connections will be explained based on FIGS. 4 to 6. As shown in FIGS. 4 and 5, the apparatus is constructed by connecting a plurality of units 10a, 10b, . . . in one direction.

Each unit has the same structure, for example, unit 10
a is as shown in FIG. As shown in the figure, on the base 11, a breaker block 12a, a main bus block 1
2b, a track side block 12C is formed. The cutoff block 12a consists of a frame 13 on the base 11, a cutoff tank 14 on the frame 13, etc., and the track side block 12c consists of a cable support frame 15 on the base 11 and the cable tank 1.
Consists of 6th magnitude. The main busbar block 12b has conduits 17a, 17b extending in a direction perpendicular to the plane of the paper, and conduits 17a, 17
It is composed of pipe lines 18a and 18b that are connected at right angles to the cable tank 14 and the cutoff tank 14, and a pipe line 19 that connects the cutoff tank 14 and the cable tank 16.

Pipe lines 17a and 17b have main bus lines l&, 1b for three phases, respectively.
are arranged in a direction perpendicular to the plane of the paper, and the main busbars la and lb are guided into the cable tank 16 via the cutoff tank 14. The disconnectors 8a, 8b are provided in the conduits 17a, 17b, with the disconnectors 2°, current transformers 3. The grounding devices 7a and 7b are provided in the breaker tank 14, and the disconnector 8c is connected to the conduit 19.
A lightning arrester 5. Instrument transformer6. Earthing device 7
c.

A cable head 4 for connecting the disconnector 8d and the load bus 27 is provided within the cable tank 16. 15 is a cable support frame.

An operating device 20 for opening and closing the breaker 2 is provided within the frame 13 and connected to a control section 21 provided protruding toward the main bus block 12b.

An operating device 22 for operating the grounding device 7 & is provided above the control unit 21 . In addition, 23 is the unit monitoring board,
24a-24e are grounding devices 7b, 7C and disconnectors 8a-8
This is an operating device for operating C.

Each unit configured in this way has a telescopic conduit 25
The pipes 17a and 17b are connected to each other by connecting them to each other via the pipes 17a and 17b.

D3 Problems to be Solved by the Invention Each unit is connected by connecting the pipes 17a and 17b, and in each unit, the height H8 from the floor to the center of the pipe 17a and the pipe Road 17
It is necessary to match the height Hl to the center of b (see Fig. 5).

However, the sizes of H+ and Ht are based on the base 11 and frame 1.
3 and the cutoff tank 14, the total error due to accumulation of processing errors of each member tends to become large.

Therefore, when connecting the pipes 17a and 17b in each unit, it is necessary to adjust the height from the floor or absorb errors, and therefore, the expandable pipes 25 shown in FIGS. 4 and 5 are It is set up to absorb errors.

In this way, it is necessary to provide an expandable and retractable conduit, and furthermore, the provision of this increases the distance between the units, which in turn increases the size of the entire device, and there is a problem that the installation space for the device within the substation increases.

Therefore, an object of the present invention is to provide a device that solves this problem.

82 Means for Solving the Problems The present invention has a configuration in which a breaker is provided inside the breaker tank and an operating device provided outside the breaker tank is interlocked and connected to the breaker. A gas-insulated switchgear unit is constructed by connecting a main busbar block with a main busbar, a main busbar block equipped with a main busbar, and a track-side block equipped with a cable head for connecting to a load, and a gas-insulated switchgear unit is configured by connecting a plurality of gas-insulated switchgear units. In a gas insulated switchgear constructed by connecting, a predetermined number of gas insulated switchgear units are attached to a single base to form a unit, and the unit units are connected to each other, and the breaker tank is directly fixed to the base to form an operating device. is attached to the side of the cutoff tank.

Since the cutoff tank is directly installed on the F0 action base and a predetermined number of units are installed on a single base, the height from the base of the installation position of the conduit for connecting each unit must be determined within each unit. It can be set to - between roads.

Therefore, each unit can be connected without providing an expandable conduit, and as a result, the device can be made more compact.

G. Examples Hereinafter, the present invention will be explained in detail based on examples shown in the drawings. It should be noted that this embodiment is a partial improvement of the conventional device, so the same parts are given the same reference numerals and the explanation will be omitted, and only the different parts will be explained.

(a) Structure of the Embodiment As shown in FIG. 1, a cutoff tank 14 is provided which is longer in the vertical direction than the conventional one, and the lower end of the cutoff tank 14 is the base! 1 is fixed directly on top. The circuit breaker 2 is placed on the stand 2
It is installed in the breaker tank 14 via 8. On the right side of the cutoff tank 14 in the figure, in addition to the conventional three outlet flanges 30, another outlet flange 30 is formed at the bottom, and a storage case 31 is attached to the outlet flange 30. An operating device 20 is provided inside the storage case 31, and the operating device 20 is operatively connected to the circuit breaker 2 via a connecting rod 29. Further, an operating device 22 is also provided and is operatively connected to the grounding device 7a via a connecting rod 32.

A control unit 21 provided outside the storage case 31 is connected to the operating device 20.

The unit has the above structure, and as shown in FIG. 2, in this embodiment, the same units 10a, 10b, and 10c are attached to a single base 11 to form a unit 33a. In the present invention, since the cutoff tank 14 is mounted directly on the base 11, there is less cumulative processing error.
The height Ht from the top of the base 11 to the center of the pipe line 17a and the height Hl from the center of the pipe line 17b are the height Hl of each unit 10a.

The pipes 10b and 10c are connected to each other, and the pipes 17a and 17b are connected to each other without using a telescopic pipe as in the conventional case. In connecting the unit units 33a and 33b, since the bases 11 are different, the telescopic conduit 25 is used as in the conventional case.

Note that the storage case 31 may be attached to the left side of the cutoff tank 14 in FIG. Further, the grounding device 7a and the operating device 22 do not necessarily need to be provided. The number of units constituting the unit may be 2 or 4 or more.

(b) Since the cutoff tank 14 is directly attached to the working base 11 of the embodiment without using the frame 13 as in the conventional case, even if an error occurs in the H8 dimension and H2 dimension shown in FIG. 2, the cutoff tank 14 This is only the amount that occurs in the machining dimensions. Conventionally, the error tends to increase because of the accumulation of processing errors of the frame 13 and the cutoff tank 14, but in the present invention, the error is small. Further, in this embodiment, three units are attached to a single base 11 as a predetermined number. In this way, since the unit units 33a and 33b are constructed by attaching the cutoff tank 14 directly to the base 11 and attaching a predetermined number of units to the single base 11, the H, , H of the cutoff tank 14 is , the dimensions are the same. Therefore, the conduits 17a and the conduits 17b can be directly connected to each other without using telescopic conduits as in the prior art, and the installation time is shortened.

As described in detail of the H9 invention, according to the device according to the present invention, a predetermined number of units are attached to a single base to form a single unit, a plurality of unit units are connected to form a device, and a cutoff tank is directly attached to the base. Since it is fixed to , the following effects are obtained.

(b) Compared to the conventional unit configuration in which the cutoff tank is attached to the base via the frame, processing errors in the frame do not accumulate, and the height from the base to the installation position of the conduit connecting each unit It becomes Roma-. Therefore,
When connecting each unit within a unit, it can be done without using a conventional telescopic conduit, and no adjustment is required. Additionally, the number of component parts can be reduced compared to the conventional method.

(b) Furthermore, since the distance between each unit is small, it is possible to transport it as a unit to the site, which is convenient for transportation. In addition, installation is easy and time-saving because no adjustment is required for coupling between units, no telescoping lines are required, and a predetermined number of units are mounted at close intervals on a single base. is shortened. Furthermore, since there is no need for a telescopic conduit, the device can be made smaller, requiring less installation space than before.

[Brief explanation of the drawing]

1 and 2 relate to the device according to the present invention, FIG. 1 is a configuration diagram of the unit, FIG. 2 is a configuration diagram of the device as seen from the ■-■ arrow in FIG. The wiring diagram of the insulated switchgear unit, FIGS. 4 to 6 relate to the conventional device, FIG. 4 is a plan view of the device, FIG. 5 is a view taken from the I-1 arrow in FIG. 4, and FIG. 4
It is a view taken along the ■-■ arrow in the figure. la, lb...main bus bar, 2...breaker, 4...
Cable head, 10a, lOb, 1Oc-unit,
11... Base, 12a... Shutoff block, 12
b... Main bus block, 12c... Track side block, 20... Operating device, 33a, 33b... Unit unit. Fig. 3 Connection diagram of gas disconnection switch unit 6th factor ■-■ arrow view of Fig. 4 (conventional)

Claims (1)

[Claims] (1) A breaker block that is equipped with a breaker inside the breaker tank and an operating device provided outside the breaker tank that is connected to the breaker, a main bus block that has a main bus bar installed, and a load connected to the breaker block. A gas insulated switchgear is configured by connecting a line side block equipped with a cable head for the purpose of connecting a gas insulated switchgear unit, and a gas insulated switchgear is configured by connecting a plurality of gas insulated switchgear units. A gas insulated switchgear characterized in that it is attached to a single base to form a unit, the units are connected to each other, a cutoff tank is directly fixed to the base, and an operating device is attached to the side of the cutoff tank.