JPH0640687B2 - Gas insulated switchgear - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a gas-insulated switchgear, and more particularly to an arrangement of a device and a container that combine the gas-insulated switchgear.

[Conventional technology]

Conventionally, a gas-insulated switchgear generally has the configuration shown in the single-wire connection diagram of FIG. 4 and the side view of FIG. 5, and has a line-side device from the circuit breaker (2) to the cable (29), that is, a current transformer (49). ), Disconnector (15), grounding device (26) (27) and cable connecting device (28)
Is configured as a single device, and the bus side device or disconnector (4
0) (41), the grounding device (44) is also configured as a single device,
Moreover, the respective devices were connected by the connecting buses (51) (52) (53) (54). (34) (35) shows the bus branch pipe.

In recent years, due to the increase in electricity demand accompanying the congestion of cities, it has become necessary to construct substations in the center of the city, and with the rise in land prices, a gas-insulated switchgear with a smaller installation area and greater reliability is provided. The use of gas-insulated substations is desired.

[Problems to be solved by the invention]

In order to meet the above demand, there is a problem that the conventional gas insulation switchgear cannot be reduced in size if the various devices are configured as individual devices as in the past. In addition, there is also a problem that the metal particles generated by the operation of the disconnector or the grounding device are suspended and the insulation performance is deteriorated.

The present invention has been made in view of the above problems of the conventional device, and an object thereof is to provide a gas-insulated switchgear having a small installation area and reliable insulation performance.

[Means for solving problems]

The gas-insulated switchgear according to the present invention has a three-phase horizontal single-row disconnector having an opening / closing direction perpendicular to the main body axis in the main body of one container, and below the movable side disconnector of the disconnector. First
A fixed side grounding part of the grounding device, and a fixed side grounding part of the second grounding device below the fixed side disconnecting device of the disconnecting device in the axial direction of the main barrel of the container. The movable grounding part of the grounding device of No. 2 and an external drawing device such as a cable connecting device are arranged in parallel with the main body axis direction of the container, and the movable grounding part is provided with a shield covering the movable grounding part. It is a thing.

[Action]

With such a configuration, the disconnector, the grounding device, and the cable connecting device are housed in the main body of one container,
The gas-insulated switchgear will be made smaller and the installation area will be reduced by combining the equipment. By shielding the movable-side grounding portions of the first and second grounding devices, the electric field at the bottom of the main barrel is reduced, metal particles and the like existing in the container do not float, and the reliability of the insulation performance is improved.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

FIG. 1 is a side view showing a composite gas-insulated switchgear according to the present invention, FIG. 2 is a bottom view of FIG. 1, and FIG.
It is an expanded detailed sectional view in the line III-III of a figure. In the figure, (1) is a cylindrical breaker container arranged in the vertical direction, and three branch pipes (3) are provided on one side at intervals in the vertical direction.
(4) and (5) are provided. (2) is a three-phase breaker, (6) (7)
(8) is an insulating spacer, each branch pipe (3) (4) of the circuit breaker container (1)
It is provided in (5) and seals the circuit breaker container (1). (9) is a cylindrical branch pipe whose one end is connected to an insulating spacer (6), (1
Reference numeral 0) is a connection conductor of each phase arranged in the branch pipe (9), and one end side of the connection conductor penetrates the insulating spacer (6) and is connected to the circuit breaker (2). As shown in FIG. 1, the connecting conductors (10) of each phase are arranged in a triangular shape on the side of the insulating spacer (6) and on the opposite side on a horizontal straight line. (49) is a current transformer provided in each connection conductor (10), (11) is the main body of the line-side container connected to the other end of the branch pipe (9), in the vertically arranged cylinder It has been constructed. (12) and (13) are an upper support and a lower support, which seal the upper and lower ends of the main body (11) of the rail-side container. Branch pipe
(9), the main body (11) of the rail-side container and the upper and lower supports (12) and (13) constitute the rail-side container (14). Reference numeral (15) is a disconnector attached to the upper support base (12), which is arranged at a position displaced above the axis of the branch pipe (9). That is, the disconnector (1
The movable contactor (not shown) of 5) is horizontally arranged at a position displaced from the axis of the branch pipe (9). The disconnector (15) is supported by the supporting insulator (16) and is connected to the connecting conductor (10) on the movable side disconnecting portion (18), and the supporting insulator (17) supports the stationary side disconnecting portion (19). ) And the operating mechanism (20), and the opening / closing direction is horizontal, that is, the direction perpendicular to the axis of the main body (11).
(26) is a first grounding device, which includes a fixed-side grounding part (21) provided on the movable-side disconnecting part (18), a movable-side grounding part (23) supported by a lower support base (13), Consists of a shield (25). (2
7) is a second grounding device, which includes a fixed side grounding part (22) provided on the fixed side disconnecting part (19), a movable side grounding part (24) supported by a lower support base (13), and a shield. It is composed of (25) and. (28)
Is a cable connecting device which is arranged in a vertical line and supported by the lower support (13), and (29) is a cable connected to the cable connecting device. One end of each of (30) and (31) is an insulating spacer (7) (8)
The main body of the cylindrical bus-side container connected to the
It is arranged between (1) and the cable (29). (32) (33)
Is a blind cover that seals the other end of the main body (30) of the bus-side container, (3
6) is a lower branch pipe provided under the main body (31) of the bus-side container,
(37) is a support plate provided so as to seal the lower end of the lower branch pipe (36), and (34) (35) are positions displaced above the axis of the main body (30) (31) of the busbar side container. Is a pair of bus branch pipes provided in the. Main trunk (31) (32), lower branch pipe (36), support plate (37), bus branch pipe (34) (3
The busbar side containers (38) and (39) are constituted by 5) and the like.
(40) (41) are the busbar branch pipes (34) in the main body (30) (31) of the busbar side container.
A disconnector placed at the same height as the shaft center of (35), consisting of a movable disconnector (42) supported by insulating spacers (7) and (8) and a fixed disconnector (43). It is configured. (44) is a grounding device, which is a fixed grounding part (45) supported by the movable disconnecting part (42).
And a movable side ground portion (46) supported by a support plate (37). (47) is the main trunk of the bus branch pipe (34) and the bus-side container
(30) Bus conductors of each phase arranged in (31), arranged in a triangular shape. (48) is the busbar conductor (47) and movable disconnector (4
2) A connecting conductor that connects to and.

In the gas-insulated switchgear configured in this way, the main body (11) of the line-side container is arranged in the vertical direction in the same manner as the circuit breaker container (1),
The disconnector (15) is arranged so that the movable contactor drives in the horizontal direction, that is, in the direction perpendicular to the axis of the main body (11), and the first and second grounding devices (26) (27) and the cable connecting device ( 28) is arranged parallel to the vertical direction, the vertical length of the line-side container (14) can be reduced. Further, since the first grounding device (26) and the second grounding device (27) can be arranged in parallel in a line, some parts can be shared. Further, since the first and second grounding devices (26) (27) are arranged below the disconnector (15), the shield (25) of the first and second grounding devices (26) (27) By rail side container
The electric field at the bottom of (14) becomes very small, and the line side container (14)
Metal particles (50), disconnectors (15), and grounding devices (2)
6) Decomposition products generated by the arc that accompanies the opening and closing of (27) fall to the bottom of the main body (11) of the line-side container and remain stationary without being subjected to the levitation force due to the electric field even when the power is applied. The reliability of insulation performance can be improved.

〔The invention's effect〕

As described above, according to the gas-insulated switchgear of the present invention,
In the main body of one container, three-phase horizontal single-row disconnectors having an opening / closing direction perpendicular to the main body axis are arranged, and the fixed side grounding part of the first grounding device is located below the movable side disconnector of the disconnector. And fixed side grounding portions of the second grounding device are provided below the fixed side disconnecting device of the disconnecting device in the axial direction of the main barrel of the container, and the movable side grounding of the first and second grounding devices is provided. The external drawing device such as the cable connection device and the cable connecting device is arranged in parallel with the main body axis direction of the container, and the movable side grounding part is provided with a shield covering the movable side grounding part, so that the entire device is reduced in size. In addition, it is possible to prevent the metal particles generated by the operation of the disconnector and the grounding device from floating and to lower the insulation performance, thereby improving the insulation reliability.

[Brief description of drawings]

FIG. 1 is a side view showing, in a sectional view, only a container of an embodiment of a compound gas insulated switchgear according to the present invention, FIG. 2 is a bottom view of FIG. 4, and FIG. 3 is a line of FIG. FIG. 4 is a partial sectional view taken along line III-III, FIG. 4 is a single wire connection diagram showing a general gas insulated switchgear, and FIG. 5 is a side view of a conventional gas insulated switchgear corresponding to FIG. In the figure, (11) is the main body of the rail-side container, (15) is the disconnector,
(18) is the movable disconnector, (19) is the fixed disconnector, (21) and (22) are the fixed grounding parts, (23) and (24) are the movable grounding parts, (25) is the shield, and (26 ) Is the first grounding device, (27) is the second grounding device, (2
8) is a cable connecting device. In each figure, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryuichiro Arai 8-1-1 Tsukaguchi Honcho, Amagasaki City, Hyogo Prefecture Itami Works, Sanryo Electric Co., Ltd. (56) Reference JP-A-58-9512 (JP, A)

Claims (1)

[Claims] 1. A three-phase batch type gas-insulated switchgear filled with insulating gas, in which a disconnector having an opening / closing direction perpendicular to the main body axis is arranged in a single three-phase horizontal row in the main body of one container. The fixed side grounding portion of the first grounding device is located below the movable side disconnecting device of the disconnecting device, and the fixed side grounding part of the second grounding device is located below the stationary side disconnecting device of the disconnecting device. Is provided in the axial direction of the main barrel of the container, and the movable-side grounding portions of the first and second grounding devices and external withdrawing devices such as cable connecting devices are arranged in parallel with the axial direction of the main barrel of the container. A gas-insulated switchgear characterized in that a shield covering the movable side grounding part is provided on the grounding part.