JPH02276403A - Compressed-gas-insulated switchgear - Google Patents

Abstract

PURPOSE:To reduce a setting space, to allow operation devices of disconnectors and earth equipment and to be installed on the anti-interrupting tank side of cable tanks and to improve their operability by arranging auxiliary tanks between adjacent cable tanks. CONSTITUTION:Auxiliary tanks 28 into which an arrestor and an instrument transformer are arranged between a unit 10a and a unit 10b. The auxiliary tanks 28 are jointed to cable tanks 16 in an extended state perpendicularly. The auxiliary tank in each unit is provided as in the case of the unit 10b. On the other hand, operation device 24a are installed to the elevation on the checking passage 29 side of cable tanks 16 where an operator on the checking passage 29 side of cable tanks 16 where an operator on the checking passage 29 is easy to operate them. In operation devices 24a as well they are installed to the same position for each unit.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a gas insulated switchgear that is smaller in size and has improved operability.

B6 Summary of the Invention The present invention provides a gas-insulated switchgear in which a unit is constructed by connecting a conduit, a cutoff tank, and a cable tank in one direction, and a plurality of units are connected in another direction perpendicular to the one direction. By arranging the auxiliary tank, which accommodates the lightning arrester, etc. and is connected to the cable tank, between adjacent cable tanks, the length of the gas-insulated switchgear in one direction is reduced and the installation space is saved. It is designed to be smaller in size and to improve the operability of the grounding device and disconnector inside the cable tank.

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 of a single wire light, 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, 71 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. 5 and 6. As shown in the figure, the apparatus is constructed by connecting a plurality of units IOa, job, . . . in one direction.

Each unit has the same structure, for example, unit IO
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 +2c consists of a cable support frame I5 and the cable tank 1 on the base 11.
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 pipes 18a and 18b that are connected to the cutoff tank 14 at right angles to the cutoff tank 14.

Pipe lines 17a and +7b have main bus lines la and Ib for three phases, respectively.
are arranged in a direction perpendicular to the plane of the paper, and the main buses Ia and 1b are guided into the cable tank I6 via the cutoff tank I4. 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, the cable head 4 for connecting the new line switches 8c and 8d, the grounding device 7C1 and the load bus 27 is provided in the cable tank I6, and the lightning arrester 5,
Potential transformer 6 is provided within auxiliary tank 28 .

An operating device 20 for opening and closing the breaker 2 is provided within the frame 13. 24a to 24c are operating devices for operating the grounding device 7c and disconnectors 8a to 8d, and 29 is an inspection passage.

The units configured in this manner are connected by connecting the conduits 17a and 17b to each other.

D1 Problem to be Solved by the Invention However, since the pipes 17a and 17b, the cutoff tank 14, the cable tank 16, the auxiliary tongue, and the ridge 28 are connected in one direction, the length in one direction is excessive. Therefore, the installation space for the gas insulated switchgear becomes larger.

Further, since the operating device 24a is located between adjacent cable tanks I6, it is difficult to operate the operating device 24a from the inspection passage 29.

Therefore, an object of the present invention is to provide a gas insulated switchgear that solves the above problem.

Means for Solving the E0 Problem The structure of the present invention to achieve the above object consists of a conduit in which a main bus is arranged, a cutoff tank containing a circuit breaker, etc., and a cable head for connecting a load. A cable tank containing lightning arresters, etc. is connected sequentially in one direction, and an auxiliary tank containing lightning arresters, etc. is connected to the cable tank to form a unit. A gas insulated switchgear in which a plurality of units are connected in different directions is characterized in that an auxiliary tank is disposed between adjacent cable tanks.

Since the auxiliary tank is not placed in one direction with respect to the F1 action cable tank, the length of the gas insulated switchgear in one direction is shortened by the auxiliary tank, and the installation space for the gas insulated switchgear is reduced. becomes smaller.

Furthermore, it becomes possible to attach an operating device for operating the new line device and the grounding device to the side opposite to the cutoff tank of the cable tank, improving operability.

G. Examples Hereinafter, the present invention will be explained in detail based on examples shown in the drawings. Note that this embodiment is an improvement on a part of the conventional gas insulated switchgear, so the same parts as the conventional gas insulated switchgear are given the same reference numerals, the explanation is omitted, and only the different parts will be explained.

(a) Structure of Example The structure of the gas insulated switchgear according to the present invention is shown in FIGS. 1 to 2.
This will be explained based on the diagram.

As shown in FIG. 1, an auxiliary tank 28 containing a lightning arrester and an instrument transformer is connected to a unit lOa and a unit 10b.
placed between. The auxiliary tank 28 is connected to the cable tank 16 in a vertically extending state. Auxiliary tanks in each unit are provided in the same manner as in unit 10b.

On the other hand, the operating device 24a is mounted on the inspection passage 29 side of the cable tank 16 at a height that allows an operator above the inspection passage 29 to easily operate it. Each unit is also attached to the same position in the operating device 24a.

A second embodiment is shown in FIG. In this case, an auxiliary tank 28 is arranged between each unit and between the cable tank 16 and the cutoff tank 14.

This was designed to allow workers to easily enter between each unit and perform maintenance.

(b) Effect of the example Next, the operation of the gas insulated switchgear will be explained.

Since the auxiliary tank 28 is not arranged along the first direction with respect to the cable tank 16, the length of the gas-insulated switchgear in the first direction is shorter by the amount that the auxiliary tank 28 is not present. On the other hand, since the auxiliary tank 28 can be attached if the pitch P between the units is about the same as in the conventional case, the length of the gas insulated switchgear in the direction of the function does not become larger than in the conventional case. Therefore, the installation space for the gas insulated switchgear can be reduced.

The operator can pass through the inspection passage 29 and operate the operating device 24a from above the inspection passage 29.

Between the units 10a and 10b in FIG.
If maintenance is to be performed between the tank a and the auxiliary tank 28, it is performed by entering from below the pipe line 17b or the auxiliary tank 28.

1-1 Effects of the Invention As can be seen from the above explanation, the gas insulated switchgear according to the present invention has the following effects.

(a) Since the auxiliary tank is placed between adjacent cable tanks and lined up with the cable tank in the other direction perpendicular to the direction in which the conduit, isolation tank, and cable tank are lined up, the gas-insulated switchgear The length in one direction is shorter, requiring less installation space than before.

(b) It is now possible to install operating devices for disconnectors and grounding devices on the anti-blocking tank side of the cable tank, and by providing an inspection passage connecting the anti-blocking tank side of each unit, workers can access the operating devices from the inspection passage. can be easily operated.

[Brief explanation of drawings]

1 and 2 relate to a first embodiment of the gas insulated switchgear according to the present invention, FIG. 1 is a plan view of the gas insulated switchgear, FIG. 2 is a front view of the gas insulated switchgear, and FIG. 3 is a front view of the gas insulated switchgear. is a plan view of a gas insulated switchgear showing the second embodiment, FIG. 4 is a wiring diagram of a gas insulated switchgear unit, FIGS. 5 to 6 relate to a conventional gas insulated switchgear, and FIG. Top view of the switchgear,
FIG. 6 is a front view of the gas insulated switchgear. Ia, lb... Main bus bar, 2... Circuit breaker, 4... Cable head, 5... Lightning arrester, 6 ・Instrument transformer, 1
0a, 10b...Unit, 14...Shutoff tank, I
6... Cable tank, 17a, +7b... Pipe line,
24a-24c... operating device, 28... auxiliary tank. Wiring diagram of gas insulated switchgear unit

Claims (1)

[Claims] (1) Connect the conduit in which the main bus bar is installed, the cutoff tank that houses the circuit breaker, etc., and the cable tank that houses the cable head, etc. for connecting the load in order in one direction, and also In a gas-insulated switchgear in which a unit is constructed by connecting an auxiliary tank containing a gas to a cable tank, and a plurality of units are connected in a direction perpendicular to one direction by connecting pipes, A gas insulated switchgear characterized in that an auxiliary tank is placed between matching cable tanks.