KR19990045634A - Gas Insulated Switchgear - Google Patents

Abstract

The present invention provides a gas insulated switchgear that can be miniaturized by arranging the manipulator between the first and second main bus units without requiring a mounting table for the manipulator. To this end, the first main bus unit 11 and the second main bus unit 12, respectively, a sealed container containing the manipulators 31 and 32 for operating the opening and closing of the bus bar disconnectors 41 and 42 by a mechanical link mechanism, respectively. ), And eccentrically from the centerline to place them in a point symmetrical position.

Description

Gas Insulated Switchgear

The present invention relates to a gas insulated switchgear, and more particularly, to a gas insulated switchgear in which main bus conductors are arranged in duplicate.

BACKGROUND ART A gas insulated switchgear is a device in which an opening and closing portion or a conducting conductor is filled in an airtight container and filled with insulating gas. Since the gas insulated switchgear is excellent in miniaturization, insulation performance and safety, it is widely installed in electric stations such as substations. As such a gas insulated switchgear, there is a double main bus structure in which a plurality of branch lines are connected to a first main bus bar and a second main bus bar through a device such as a breaker.

The first main bus unit and the second main bus unit of the conventional gas insulated switchgear are configured as described in Japanese Patent Laid-Open No. 1-8906 and Japanese Patent Laid-Open No. 62-272809. The main bus unit is connected to a sealed container for accommodating the bus bar disconnectors, and an operation device for opening and closing the bus bar disconnectors is provided outside the main bus unit in the horizontal direction. In this configuration, the bus bar disconnector and the manipulator are connected via a first linkage connecting the busbar disconnector, the second control shaft operated by the manipulator, the first control shaft and the second control shaft, It is supported by a mounting stand supported in an airtight container. Moreover, the branch circuit unit which accommodates a circuit breaker etc. in the opposite direction to a manipulator is provided.

As described above, in the related art, a manipulator for manipulating the opening and closing of the bus bar disconnector is provided outside the main bus unit, and a connection link is provided to absorb gaps caused by manufacturing tolerances and assembly tolerances between the sealed vessel and the manipulator. For the reason that the main bus voltage adopts a manipulator which can be used universally from a relatively low voltage to a high voltage, etc., the manipulator is large in size and heavy in weight, and therefore, it is necessary to install a mount for supporting the manipulator. The installation position of the manipulator was arranged at the center position in the longitudinal direction of the main bus unit and in the direction opposite to the branch line unit with the bus line as the axis.

As described above, in the conventional gas insulated switchgear, since the manipulator protrudes outward, it is hindering the miniaturization of the entire gas insulated switchgear. Therefore, in order to downsize the gas insulated switchgear, attention is paid to the space between the first main bus unit and the second main bus unit, so that the positions of the first main bus unit and the second main bus unit are not changed. It is conceivable to arrange the manipulator for operating the busbar side disconnector to be stored between the main busbar units described above. However, in the conventional structure, when the manipulator is disposed between the first main busbar unit and the second main busbar unit, There was a problem of widening the interval.

A first object of the present invention is to provide a gas insulated switchgear capable of miniaturizing a gas insulated switchgear by disposing the manipulator between the first and second main bus units.

A second object of the present invention is to provide a gas insulated switchgear which enables cost reduction by sharing the first main bus unit and the second main bus unit in the same shape.

1 is a front view of a gas insulated switchgear according to an embodiment of the present invention;

2 is a side view of the gas insulated switchgear of the embodiment;

3 is a front view seen from the arrow A-A of FIG.

4 is a disconnected wiring diagram showing the line configuration of the switch office of the present embodiment;

5 is a side view of a gas insulated switchgear having an isosceles triangular arrangement of a main bus conductor in another embodiment of the present invention;

Figure 6 is a side view of the gas insulated switchgear with the main bus conductor in an equilateral triangle arrangement in another embodiment of the present invention.

A gas insulated switchgear according to the present invention which achieves the above object comprises a first main bus unit comprising a first bus bar disconnector connected to a first main bus conductor and the first main bus conductor in a container; 2nd main bus unit which paralleled with 1 main bus unit and accommodated the 2nd main bus disconnector connected to a 2nd main bus conductor and said 2nd main bus conductor, and said 1st, 2nd main bus unit The first and second manipulators, each of which is a double bus that connects a plurality of branch lines through a device including a circuit breaker and performs opening and closing operations of the disconnector connected to the first and second buses, respectively. And between the second main busbar units, and the first and second manipulators are eccentric from the center line and placed side by side in a point symmetrical position.

In addition, the main container unit and the sealed container for storing the manipulator connected to the main bus unit are rotated 180 degrees, and connected to the other main bus unit and the above main bus unit at the positions of parallel movement and overlap. The sealed container for accommodating the used manipulator is disposed.

A gas insulated switchgear according to the present invention for achieving the above object includes a first main bus unit which houses a first bus bar disconnector connected to the first main bus conductor and the first main bus conductor, and a second main bus unit. A second main bus unit unit accommodating a bus bus conductor and a second bus bar disconnector connected to the second main bus conductor is placed side by side, and the first and second main bus units include a device including a breaker. The first and second main bus units described above, which are double buses connected to a plurality of branch line units, and which house an airtight container that operates an opening / closing operation of the first bus bar disconnector and the second bus bar disconnector. It arrange | positions adjacent to the axial direction between them, and connects the operation shaft of the manipulator provided in the anti-branching line unit side with the bus bar disconnector via a mechanical link mechanism.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 4. 1 is a front view of the gas insulated switchgear according to the present embodiment, FIG. 2 is a side view of the gas insulated switchgear according to the present embodiment, FIG. 3 is a front view as seen from arrow AA in FIG. 2, and FIG. 4 is a gas insulated switchgear according to the present embodiment. It is the unity diagram of.

In the gas insulated switchgear according to the present embodiment, as shown in FIG. 4, the first main bus 21 and the second main bus 22 are respectively the first main bus unit 11 and the second main bus unit 12. Are connected via an insulating spacer 54, respectively. In this gas insulated switchgear, the branch circuit unit 14, which houses devices such as the circuit breaker 61, the line side breaker 43, the lightning arrester 81, and the like in a container filled with gas, is arranged at predetermined intervals. . In each of the branch line units 14, each of the first main bus unit 11 constituting the first main bus 21 and the second main bus unit 12 constituting the second main bus 22 are insulated spacers. It is connected via (51, 52). The bus bar disconnectors 41 and 42 connected to the first main bus unit 11 and the second main bus unit 12 for each branch line of the first main bus 21 and the second main bus 22, respectively. ) Is stored, the first main bus unit 11 is connected in series, the first main bus 21, the second main bus unit 12 is connected in series to connect the second main bus 22 It consists.

1 to 3, the first main bus line 21 is disposed above the side of the branch line unit 14, and the second main bus line 22 is disposed below the first main bus line 21. It is. The first main busbar 21 and the second main busbar 22 for three phases are perpendicular to each other in the container of the first main bus unit 11 and the second main bus unit 12 filled with gas. Are arranged in a straight line shape and are collectively stored. The main busbar units 11 and 12 each have openings on both sides of the main busbar direction, and openings are provided on one side in a direction orthogonal thereto. Insulating spacers 51, 52, 53, and 54 are provided in these openings, respectively. The container of the main bus units 11 and 12 and the container of the branch circuit unit 14 are connected to each other in an airtight manner through the insulating spacers 51 and 52, and the first main bus 21 and the second main bus 22 Is connected to the conductor portion 23 provided through the bus bar disconnectors 41 and 42 and penetrating through the insulating spacers 51 and 52, respectively. Here, as shown in FIG. 3, the conductor part 23 is arrange | positioned at linear form in the horizontal direction so that it may become point symmetry centering on the center of an insulation spacer. The conductor part on the side of the first main bus line 21 and the conductor part on the side of the second main bus line 22 provided in the branch circuit unit 14 connected to the conductor part 23 pass through the conductor 24 provided in the longitudinal direction. It is connected to 61.

As shown in FIG. 4, ground breakers 71 and 72 are provided on both of the breakers 61. The breaker 61 is connected to the branch line 91 again to the cable head 82 via the line side disconnector 43. A grounding switch 73, an instrument transformer 83, and an arrester 81 are connected between the line disconnector 43 and the cable head 82, respectively.

On the other hand, the first main bus unit 11 and the second main bus unit 12, respectively, the first main bus unit 11 and the second main bus unit 12 of the adjacent line via the insulating spacer 53, 54. ) Is kept airtight, and branches to the first main bus unit 11 and the second main bus unit 12 of the adjacent circuit similarly to the first main bus 21 and the second main bus 22. The bus bar disconnectors 41 and 42 connected to each line are accommodated in three phases, respectively.

The bus bar disconnectors 41 and 42 are collectively operated by the operation shaft 33. The operation shaft 33 for operating the bus bar disconnector 41 connected to the first main bus 21 passes through the sliding airtight portion provided below the first main bus unit 11, and further includes the second main bus 22. The operation shaft 33 which operates the bus bar side disconnector 42 connected to is connected to the manipulators 31 and 32 provided outside, respectively, via the sliding airtight part provided above the 2nd main bus unit 12. The manipulators 31 and 32 are housed in a hermetically sealed container, and the conductor portion 23 having a straight line shape is formed between the first main bus unit 11 and the second main bus unit 12 as the central axis 100. It is eccentric with respect to the center axis | shaft 100, and is arrange | positioned adjacent to the point symmetrical position with respect to the point 101. FIG.

As shown in FIG. 2, the operation shaft 33 is half the first main bus 21 and the second main bus 22 in the first main bus unit 11 and the second main bus unit 12. It is provided on the branch line unit 14 side, and is connected to the three-phase bus bar disconnectors 41 and 42 via a mechanical link mechanism, and the link mechanism is rotated by the rotational movement of the operating shaft 33, for example. The opening and closing operation of the bus bar disconnectors 41 and 42 is performed.

According to the present embodiment, the first main bus unit and the second main bus unit can be formed in the same shape, and the first main bus unit and the second main bus unit can be shared. Moreover, since it can arrange | position so compactly, it becomes advantageous for reduction of manufacturing cost of a gas insulated switchgear or reduction. Moreover, when one main bus unit is rotated 180 degrees and moved in parallel, it can be used as another main bus unit, and the main bus unit can be shared.

Incidentally, the present invention is not limited to the arrangement of the first main bus 21 and the second main bus 22 in the first main bus unit and the second main bus unit. , An isosceles triangle arrangement as shown in FIG. 5, or an equilateral triangle arrangement as shown in FIG. 6 can be appropriately selected. Also in this case, the manipulators 31 and 32 are operated between the first main bus unit 11 and the second main bus unit 12 in the same manner as in the embodiment shown in FIGS. 1 to 4. The linear conductor portion 23 is used as the central axis 100 so as to be eccentric with respect to the central axis 100 and disposed adjacent to the point 101 in a point symmetrical position.

According to the present invention described above, the gas insulated switchgear can be made compact by arranging the manipulator for operating the bus bar disconnector at a point symmetrical position with respect to the center line between the first main bus unit and the second main bus unit. have. In addition, when one main bus unit is rotated 180 degrees and moved in parallel, the other main bus unit can be used as the other main bus unit, so that the main bus unit can be shared and a low cost and compact gas insulated switchgear can be provided. .

Claims (3)

A first main bus unit, which is housed in a container, a first bus bar disconnector connected to the first main bus conductor and the first main bus conductor, a second main bus conductor and the second main bus conductor A plurality of branch circuits are connected to the second main bus unit connected to one second main bus conductor through a device including a breaker to the first and second main bus units. As a gas insulated switchgear of a double bus The 1st, 2nd manipulator which performs opening / closing operation of the disconnecting device connected to said 1st, 2nd bus bar is provided between said 1st, 2nd main busbar units, respectively, and the said 1st, 2nd manipulator is center line A gas insulated switchgear, which is eccentric from and placed side by side in a point symmetrical position. The method of claim 1, A manipulator connected to the other main bus unit and the main bus unit at the same time by rotating the sealed container for storing one main bus unit and the manipulator connected to the main bus unit 180 degrees in parallel and overlapping positions. Gas insulated switchgear, characterized in that the sealed container for receiving the arrangement. A first main bus unit in which a first bus bar disconnector connected to the first main bus conductor and the first main bus conductor is housed in a container, a second main bus conductor and a second main bus conductor connected to the second main bus conductor The gas of the double bus bar which the 2nd main bus unit which accommodated 2 bus bar disconnector in a container was put in parallel, and connected several branch circuit unit to the said 1st, 2nd main bus unit through the apparatus containing a breaker. Insulated switchgear, The airtight container which accommodates the operation | movement which controls the opening and closing of the said 1st bus-line disconnector and the 2nd bus-bar disconnector is arrange | positioned adjacent to the axial direction between the said 1st, 2nd main busbar unit, and is anti The gas insulated switchgear characterized in that the operation shaft of the manipulator installed on the branch line unit is connected to the bus bar disconnector through the mechanical link mechanism.