JPH10304521A - Gas-insulated switch gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas insulated switch gear with a small total length and simple water-proof structure and easy maintenance work by using a gas- container branch tube as a mechanical operation box for a bus-disconnecting unit. SOLUTION: A gas container 21 of a bus-disconnecting unit is made of a main tube 22 and branch tubes 23 and 24 in a cross shape. A bus line 11 is stored in the main tube 22, while a main bus-disconnecting body 12 is stored in the branch tube 24. At the same time, an operation unit 13 for the bus- disconnecting unit is stored in the branch tube 23. The main tube 22 and the branch tube 23 storing the operation unit 13 are separated in each gas section by a partition plate 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a gas insulated switchgear used in a power circuit.

[0002]

2. Description of the Related Art In a gas insulated switchgear in which a bus disconnector or a bus grounding switch is installed on a bus, these operating devices are installed near the switch. FIG. 3 shows an example of this type of conventional gas insulated switchgear.
The S1 and the instep bus disconnector unit 31 in which the instep bus disconnector DS1 is housed, and the maiden bus BUS2 and the inboard bus disconnector unit 32 in which the bus line disconnector DS2 are housed,
The circuit breaker unit 33 containing the circuit breaker CB, the earthing switches ES11 and ES12, and the current transformer CT is connected.

The circuit breaker unit 33 is connected to a line disconnector DS3, a line ground switch ES13, and a line DS / ES / CH unit 34 accommodating the cable head CH. Further, the line DS / ES / CH unit 3
The LA / PT unit 35 containing the lightning arrester LA and the instrument transformer PT is connected to 4.

[0004] Kou bus disconnector DS1 and Oto bus disconnector D
S2 includes operating devices 36 and 3 for performing the opening and closing operations.
Reference numeral 7 is attached to the vicinity of, for example, the front or the vertical direction (the front in the figure) of the insteps and the bus lines BUS1 and BUS2. Reference numeral 38 denotes a control panel disposed below the busbar unit 32.

FIG. 4 shows another example of the conventional gas insulated switchgear. The former bus BUS1 and the former bus ground switchgear unit 41 in which the former bus ground switch ES1 is stored.
And the maiden bus grounding switch unit 42 containing the maiden bus BUS2 and the maiden bus grounding switch ES2 are connected to instrument transformers (GPT) 43, 44, respectively. The operating devices 45 and 46 for performing opening and closing operations of the instep bus grounding switch ES1 and the inversion bus switch ES2 are provided in front of or in the up and down direction of the instep and the grounding switch units 41 and 42 (lower side in the figure). ), Etc., respectively.

[0006]

However, in the conventional gas insulated switchgear, the instep and the E-bus disconnectors DS1 and DS2 or the instep and the E-bus ground switch ES are used.
The operation devices 36, 37, 45 and 46 of the ES1 and ES2 have a mechanism box separately from the gas containers of the respective units 31, 32, 41 and 42. Due to the shape, more space is required than necessary between the mounting of the gas container and the mechanism box. For this reason, in the case of the gas insulated switchgear shown in FIG. 3, when the instep and the insulated bus line disconnector operating devices 36 and 37 are arranged in front of the instep and the insulated bus line units 31 and 32, the operating device 3
The length of the gas insulated switchgear is increased because the members 6, 37 are mounted so as to protrude from the instep and the bus line units 31, 32.

[0007] In the case of the gas insulated switchgear shown in FIG. 4, the upper and lower bus grounding switch operating devices 45 and 46 are arranged below the upper and lower bus grounding switch units 41 and 42, respectively. As a result, the operation mechanism is mounted in a narrow space, which may make it difficult to perform maintenance work.

Further, the units 31, 32, 41, 42
And the machine boxes for the operating devices 36, 37, 45 and 46 separately from the gas containers of
It is necessary to provide a waterproof structure for the connection part between S2 and the former and the busbar earthing switches ES1 and ES2, and it is also necessary to consider the waterproof structure of the mechanism box itself, and the mechanism box becomes large.

Accordingly, an object of the present invention is to provide a gas insulated switchgear which can shorten the total length of the gas insulated switchgear, can omit the mechanism box of the operating device, and can easily perform maintenance and inspection work. I do.

[0010]

According to the present invention, in a gas insulated switchgear having a bus and a bus unit having a bus disconnector or a bus grounding switch attached to the bus, the gas container of the bus unit is , A main pipe and a branch pipe crossing the main pipe are formed in a cross shape, a bus is housed in the main pipe, and a main body of the bus disconnector or the bus ground switch is provided in one of the branch pipes. Is housed, and an operating device of the bus disconnector or the bus grounding switch is housed in the other of the branch pipes, and a partition is provided between the mother pipe and the branch pipe in which the operating device is housed. Gas partition with plates.

In the gas insulated switchgear of the present invention configured as described above, since the branch tube of the gas container is used as the mechanism box of the operating device of the bus disconnector or the bus earthing switch, the operating device is connected to the bus. Since the gas-insulated switchgear is not attached in a form protruding to the front, the overall length of the gas-insulated switchgear is shortened.
Also, it is not necessary to consider the waterproof structure of the connection between the operating device and the main body of the bus disconnector or the bus grounding switch and the waterproof structure of the mechanism box itself. Further, maintenance work can be easily performed from the front.

[0012]

1 and 2 show an embodiment of a gas insulated switchgear according to the present invention. In FIG. 1 and FIG.
Are cross-shaped, and the bus 11 is accommodated in the bus 22, and the operating device 13 of the bus disconnectors DS 1 and DS 2 and the rear branch 2
4, the main bodies 12 of the bus disconnectors DS1 and DS2 are stored, respectively, and connected to the circuit breaker unit 33. An insulating gas is filled in the bus pipe 22 in which the bus 11 is stored and the branch pipe 24 in which the main bodies 12 of the bus disconnectors DS1 and DS2 are stored, and the operating device 13 of the bus disconnectors DS1 and DS2
A partition plate 25 for a gas compartment is provided at the boundary with the branch pipe 23 in which the gas is stored to form a gas compartment.

A branch pipe 23 for accommodating the operating device 13 serves as a mechanism box, and a front door 26 of the operating device 13 is attached to the front of the branch pipe 23. By providing the front door 26 with an open / close display and an operation handle insertion port, operation and maintenance work can be easily performed from the front. Main body 12 of bus disconnector DS1, DS2 and operating device 1
By pulling out the shaft 14 connecting the shaft 3 to the partition plate 25 side, the sealing structure on the waterproof surface is not required, and the reliability is improved.

In the above-described embodiment, the instep and the insulated bush disconnectors units 1 and 2 in which the instep and the maiden bus disconnectors DS1 and DS2 are stored have been described. A similar configuration may be applied to the case of the maiden bus grounding switch unit, and a description thereof will be omitted.

[0015]

As described above, according to the present invention, the mechanism box of the operating device of the bus disconnector or the bus grounding switch can be omitted, so that the total length of the gas insulated switchgear can be shortened. At the same time, the waterproof structure can be simplified,
Moreover, maintenance and inspection work can be facilitated.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment of a gas insulated switchgear of the present invention, wherein (A) is a side view and (B) is a front view.

FIG. 2 shows details of the bus disconnector unit;
(A) is a plan view and (B) is a front view.

FIG. 3 shows an example of a conventional gas insulated switchgear;
(A) is a side view, (B) is a front view.

4A and 4B show another example of a conventional gas insulated switchgear, in which FIG. 4A is a side view and FIG. 4B is a front view.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Instep bus disconnector unit 2 Inversion bus disconnector unit 6 Instep bus disconnector operating device 7 Inverter bus disconnector operation device 11 Bus 12 Main bus disconnector main body 13 Operating device 14 Shaft 21 Gas container 22 Main pipe 23 Branch pipe 24 Branch pipe 25 Partition plate 26 Front door 31 Insulated bus disconnector unit 32 Insulated bus disconnector unit 33 Circuit breaker unit 34 Line DS / ES / CH unit 35 LA / PT unit 36 Insulated bus disconnector operating device 37 Insulated bus disconnector operating device

Claims (1)

[Claims] 1. A gas insulated switchgear comprising a bus unit having a bus and a bus disconnector or a bus grounding switch attached to the bus, wherein a gas container of the bus unit includes a bus and a bus. A branch pipe crossing the pipe is formed in a cross shape, a bus is stored in the bus, and a main body of the bus disconnector or the bus grounding switch is stored in one of the branch pipes; An operating device of the bus disconnector or the bus grounding switch is stored in the other of the branch pipes, and a gas is partitioned by a partition plate between the mother pipe and the branch pipe in which the operating device is stored. A gas-insulated switchgear characterized by the above-mentioned.