JPH05328546A - Insulating gas-filled composite switch gear - Google Patents

Abstract

(57) [Summary] [Purpose] For gas-insulated composite switchgear, to facilitate maintenance and inspection, improve earthquake resistance and environmental friendliness, and reduce the installation area. [Structure] Insulating gas is enclosed and the blocking unit 2 is arranged horizontally.
1a of the one electrode portion, the horizontal disconnector 22a,
22b and terminal portions 28b, 2 for connecting to the double bus
6 bushings 27 with 8c, 28e, 28f
c and 27f are connected in series, and the other electrode portion has three bushings 24c provided with a horizontally arranged disconnector 22c and terminal portions 29b and 29c for connecting to the overhead power transmission line.
And are connected in series. In addition, the nine terminal portions 28b,
The arrangement of 28c, 28e, 28f, 29b, 29c is parallel to the interphase direction and the interpolar direction and orthogonal to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated composite switchgear used for a double bus type substation, switchgear, etc.

[0002]

2. Description of the Related Art FIG. 4 shows a general single-bus line diagram for one line of a double bus system. 1 is a circuit breaker, 2a is a disconnecting switch for a main bus 3a, 2b is a disconnecting switch for a main bus 3b, 2c. Is a line disconnector and 4 is a bushing. FIG. 5 is a conventional example of an arrangement configuration of a gas-insulated composite switchgear corresponding to the single-line connection diagram shown in FIG. 4, and FIGS. 6 and 7 are a side view and a top view of FIG. 5, respectively.

In FIGS. 5, 6, and 7, the circuit breaker 11 is arranged so that the axial direction of opening / closing operation is perpendicular to the installation surface, and is connected to both ends of the circuit breaker 11a in the tank of the circuit breaker 11. It is housed in the tank of the circuit breaker 11 together with the conductors 15 and 15c. The conductor 15 in this is branched into two in the tank of the circuit breaker 11, and these conductors 15a, 1
5b and 15c are respectively derived from the three outlets 16a, 16b and 16c of the tank of the circuit breaker 11 and are arranged so that the axial direction of the opening / closing operation is perpendicular to the installation surface. Terminal parts 18a, 18b, 18c, 18d, 1 for connecting to two main buses of the air insulation system via 12b and the line disconnector 12c.
8e, 18f, and nine bushings 17a, 17b, 17c, 17d, 1 equipped with terminal portions 19a, 19b, 19c for connecting to the overhead transmission line of the air insulation method
7e, 17f, 14a, 14b, 14c are connected.

In this conventional example, the nine terminal portions 18a, 18b, 18c, 18d, 18e, 18f, 1 are provided.
The arrangement of 9a, 19b and 19c is such that the terminal portion 1 is viewed from above.
Line segment in the interphase direction connecting 8a, 18b, and 18c and the terminal portion 1
The line segments in the interphase direction connecting 8d, 18e, and 18f are arranged in parallel as two opposite sides of the rectangle, and the line segments in the interphase direction and the terminal portions 14a, 14b, 14 are arranged.
Since the line segments in the interphase direction connecting c are arranged so as to be orthogonal to each other, it is assumed that the distance for maintaining the air insulation between the phases and the poles is L, and the terminal portions 18c and 18f and the terminal portions 19a and 1 are
Assuming that the distance that maintains insulation from 9b and 19c is L ',
Nine terminal portions 18a, 18b, 18c, 18d, 18
The area S'necessary for arranging e, 18f, 19a, 19b, 19c is represented by S '= 4L2 + (2L * L') ... (1).

[0005]

However, in this conventional arrangement of the gas-insulated composite switchgear, the circuit breaker 1 is used.
Since 1 and the disconnectors 12a, 12b, 12c are arranged so that the axial direction of the opening / closing operation is perpendicular to the installation surface, the height of the equipment is high, and the constituent equipment such as the operating device is located above. The case was inconvenient to maintain. Further, since the terminals are arranged as described above, there is a drawback that the installation area of the device becomes large. Therefore, the present invention is intended to facilitate maintenance and inspection, improve earthquake resistance and environmental harmony, and reduce the installation area in a gas-insulated composite switchgear.

[0006]

According to the present invention, a movable side electrode portion and a fixed side electrode portion which are opened and closed in the axial direction of the tank are provided in a tank of a circuit breaker which is filled with an insulating gas and arranged horizontally. The shut-off portion provided is housed and arranged in a three-phase package and led out from either the movable side or the fixed side electrode portion.
Two disconnectors, which are arranged so that the axial direction of the opening / closing operation is horizontal, are provided on the conductors that are branched into two and lead out from the two outlets of the three outlets of the tank of the circuit breaker. Three bushings each having a terminal portion for connecting to a two-phase three-phase main bus of the medium insulation system are connected in series, and are connected to the other electrode portion of the cutoff portion, A conductor for leading out from a lead-out portion different from the two lead-out portions, a disconnector arranged so that the axial direction of the opening / closing operation is horizontal, and a terminal for connecting to an air-insulated three-phase overhead power transmission line. The parts are connected in series with three bushings provided at the tip thereof. The arrangement of the terminal portions of the above nine bushing tips connected to the two main buses and the overhead power transmission line is as follows.
It is desirable to be parallel to the interphase direction and the interpolar direction, and be orthogonal to each other.

[0007]

In the gas-insulated composite switchgear of the present invention constructed as described above, the height of the equipment as a whole and the center of gravity of the equipment are lowered by lowering the mounting position of the equipment such as the disconnecting switch, and maintenance. The inspection can be facilitated, the earthquake resistance and the environmental friendliness can be improved, and because the circuit breaker and the disconnector are arranged horizontally, the gas between the devices is divided under the circuit breaker and the disconnector that are in operation. Insulating spacer is not placed,
It becomes difficult for metal foreign matter to adhere to the surface of the insulating spacer, and especially in the case of circuit breakers, since the circuit breaker has the same drive energy and switching characteristics as the single gas circuit breaker separately arranged for each phase, Parts can be shared. The installation area of the device can be reduced by arranging the terminal portion as described above.

[0008]

1 is an example of a gas-insulated composite switchgear according to the present invention, and FIG. 2 and FIG. 3 show a side view and a top view of FIG. 1, respectively. In the present embodiment, the circuit breaker 21 is arranged so that the axial direction in which the circuit breaker opens and closes is horizontal, and in the tank of the circuit breaker 21 together with the conductors 25 and 25c connected to both ends of the circuit breaker 21a inside the circuit breaker 21. It is stored and arranged.

One of the conductors 25 is branched into two in the tank of the circuit breaker 21, and the branched conductors 25a and 25b.
Are disconnected from the lead-out portions 26a and 26b and are arranged so that the axial direction of the opening / closing operation is horizontal.
And terminal portions 28a, 28b, 28c, 28d, 28e,
6 bushings 27a, 2 having 28f at their tip
7b, 27c, 27d, 27e, and 27f are connected to the two-phase three-phase main bus of the air insulation system, and are also connected to the other electrode part of the cutoff part and are led out from the lead-out part 26c. 25c includes a disconnector 22c arranged so that the axial direction of the opening / closing operation is horizontal, and terminal portions 29a, 29b,
Three bushings 24a, 2 having 29c at their tips
It is connected to the three-phase overhead transmission line of the air insulation system via 4b and 24c.

The above-mentioned total of nine bushing terminal portions 28 connected to the two main buses and the overhead power transmission line.
a, 28b, 28c, 28d, 28e, 28f, 29
The arrangement of a, 29b and 29c is such that the terminal portion 2 is viewed from above.
Line segment in the interphase direction connecting 8a, 28b, 28c and the terminal portion 2
Line segment in the interphase direction connecting 8d, 28e, 28f and the terminal portion 2
The line segments in the interphase direction connecting 9a, 29b, 29c are parallel to each other and the line segment in the interelectrode direction connecting the terminal portions 28a, 28d, 29a and the line segment in the interelectrode direction connecting the terminal portions 28b, 28e, 29b. The line segments in the interpolar direction connecting the terminal portions 28c, 28f, 29c are arranged in parallel, and the three line segments in the interphase and the three line segments in the interphase are orthogonal to each other. Is located in.

In this case, assuming that the distance for maintaining the air insulation between the phases and between the electrodes is L, the nine terminal portions 28a, 28 are connected.
b, 28c, 28d, 28e, 28f, 29a, 29
The area S required for arranging b and 29c is represented by S = 4L2 ... (2).

[0012]

As described above, according to the present invention, the circuit breaker and the main circuit and line disconnectors are arranged so that the axial directions of the opening and closing operations are horizontal, so that the height of the entire device is increased. , And the center of gravity is lowered, and earthquake resistance and environmental harmony can be improved, and it becomes difficult for metal foreign matter to adhere to the surface of the insulating spacer that divides the gas between devices. Since the circuit breaker and drive energy, switching characteristics, etc. are common, parts can be shared. The area S required for arranging the terminal portion according to the present invention and the area S ′ required for arranging the terminal portion of the conventional example are expressed by the above formula (1),
From (2), S = S '+ (2L × L') (3), and of course the installation area of the equipment can be reduced by arranging as described above.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a gas-insulated composite switchgear of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a top view of FIG.

FIG. 4 is a single line connection diagram for one line of a general double bus system.

FIG. 5 is a diagram showing a general example of a conventional gas-insulated composite switchgear.

FIG. 6 is a side view of FIG.

FIG. 7 is a top view of FIG.

[Explanation of symbols]

 21 Circuit breaker 21a Circuit breaker 22a, 22b, 22c Disconnector 27a, 27b, 27c Bushing 27d, 27e, 27f Bushing 24a, 24b, 24c Bushing 28a, 28b, 28c Terminal part 28d, 28e, 28f Terminal part 29a, 29b, 29c Terminal part

Claims (2)

[Claims] 1. A movable-side electrode part, which is filled with an insulating gas and is housed and arranged in a tank of a circuit breaker horizontally arranged in a three-phase manner, and which opens and closes in the axial direction of the tank, and a fixed-side electrode part. A breaker, and a conductor that is connected to one of the movable-side and fixed-side electrode parts and branches into two, which is led out from two lead-out parts of the three lead-out parts of the tank of the circuit breaker; , The terminals for connecting to the two-phase three-phase main bus of the air insulation system are respectively connected in series between the three bushings provided at the tip, and the axial direction of the opening / closing operation becomes horizontal. Two disconnecting switches arranged in such a manner, a conductor connected to the other electrode part of the cutoff part and led out from a lead-out part different from the two lead-out parts, and an air-insulated three-phase overhead feed 3 bushings equipped with terminals for connecting to electric wires Three-phase type gas insulated composite switchgear comprising connected in series, the breaker axial opening and closing operation is arranged to be horizontal, the between. 2. Arrangement of a total of nine terminal portions of the above-mentioned bushing tips connected to the main bus and the overhead power transmission line of the two systems are parallel to each other in the interphase direction and the interpolar direction, and are orthogonal to each other. The gas-insulated composite switchgear according to claim 1, wherein