JPS59201329A - Power switching device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power switchgear, and more particularly to a power switchgear including a disconnector and a circuit breaker.

Conventionally, there has been a power switchgear of this type as shown in FIG. In the figure, (1) is the mount, and (2) is the mount (1
), and is arranged at a predetermined distance from other disconnector support insulators (3). (4
) has a terminal (4a) and is a fixed contact supported by the disconnector support insulator (2), and (5) is a movable contact that can be brought into contact with and separated from the fixed contact (4), and the disconnector support insulator A disconnector drive mechanism (6) supported by (3) is mechanically coupled to the movable contact (5). The closed state of the movable contactor (5) is shown by a solid line, and the broken line shows the case of an open state. (7) is a drive insulator driven by a drive source (not shown), which drives the movable contact (5) to open and close via a drive mechanism (6). (
8) is a disconnector operating mechanism composed of a drive mechanism (6) and a drive insulator (7); (9) is a breaker support insulator;
10M).

(1o) is supported. (11) An operating mechanism for operating the breaker (1o), (
12) is the power receiving line connected to the terminal (4a), (13) is the connection line connecting the movable contact (5) and the terminal (10a), and (14) is the power feeding line connected to the terminal (10b). It is.

Conventional power switchgear, which consists of a disconnector and a circuit breaker electrically connected to each other, is constructed as described above, and its installation is generally large and Because of this, several people are required to install the disconnector side, the pedestal (1), the breaker operating mechanism (14), the support insulator (9), etc., and the connection wire (1).
3) and the disconnector drive mechanism (6) and terminal (10a), the stand (1) on the disconnector side
Usually, sufficient space is secured between the support insulator (3), drive mechanism (6), and the breaker-side operating mechanism (11), support insulator (9), and breaker section (10). there were.

By the way, with the spread of gas-insulated switchgear configured by housing a disconnector and a circuit breaker in a common gas tank, the advantage of gas-insulated switchgear - the small installation area - has been reduced to the above-mentioned independent This has also begun to be required for disconnectors and power switchgears configured with circuit breakers. In order to meet this requirement, in the conventional switchgear shown in FIG. 1
) and the high-potential terminal (10a), and the distance between the drive mechanism (6) of the disconnector, which has a different potential when the breaker (10) is cut off, and the terminal (10b) of the breaker If both become short, a problem arises in that a sufficient spatial insulation distance cannot be ensured, and therefore, in reality, the distance between the disconnector and the disconnector side cannot be made very short, and a fairly large space is required.

This invention was made in view of the above circumstances, and is a power switchgear configured by electrically connecting a disconnector and a circuit breaker, which has a fixed contact and a terminal of the disconnector at its tip. and a common support insulator having a drive mechanism at its tip for closing and opening a movable contact of the disconnector with respect to a fixed contact of the disconnector are arranged substantially vertically at a predetermined interval, respectively. The installation area of the power switchgear made up of the disconnector and the breaker is reduced by providing the disconnecting part of the breaker at the tip of the common support insulator provided with the drive mechanism. Can be made small,
Moreover, the workability of installation work, connection work, etc. has been improved,
Furthermore, it is an object of the present invention to provide a power switchgear which can secure a sufficient spatial insulation distance between parts of different potentials, has a simple structure, is convenient for transportation, and is inexpensive.

An embodiment of the present invention will be described below with reference to FIG. In Fig. 2, (2) is a vertical disconnector (5) supporting insulator, and (4) is a U-shaped disconnector fixed contact provided on the upper surface of the tip of this disconnector supporting insulator, and (4) is a terminal (4a). )
have. (5) is a rod-shaped movable contact of a disconnector,
It pivots in the vertical direction to the position shown by the one-dot chain line, and is inserted into the fixed contact (4) while twisting about the axis and released while twisting. (12) is a power receiving line connected to the terminal (4a), (14) is a power supply line, and (15) is a common pedestal, the upper surface of which is formed into a flat and horizontal surface.

(16) is a hollow common support insulator fixed perpendicularly to the upper surface (15a) of the common frame (15), and (17) is the common frame (15).
15) A driving source for the circuit breaker provided on the top surface, which may be, for example, an electric motor. Reference numeral (18) denotes a breaking portion of the insulator type gas breaker, which is inclined to the side opposite to the disconnector supporting insulator (2) as shown in the figure. (18a) Breaking part (
18) hollow lower terminal, (18b) is the breaking part (18)
) to which the feeder line (14) is connected. (
180) The fixed contact (18d) of the breaker (18) is a movable contact of the breaker (18), and (19) is a breaker drive shaft made of an insulator and provided within the common support insulator (16). By moving in the vertical direction, the breaker movable contact (18d) is made to turn on and off to the identification contact (18Q) via the link mechanism (20) in the breaker lower terminal (18a).

(21) is a breaker drive shaft (
The disconnector drive shaft (22) in the breaker lower terminal (18a) is connected to the disconnector drive shaft (22) in the breaker lower terminal (18a) by interlocking the rotation about the axis with the disconnector drive shaft made of an insulator installed vertically and parallel to the disconnector drive shaft (19). ) to pivot and twist the disconnector movable contact (5). (23) is a height adjustment adapter fixed to the top surface (15a) of the common pedestal (15), and the support insulator (2) is attached to the top surface. The lower ends of both the assembly shafts (19) and (21) are mechanically connected to a drive source (17), so that the drive source (17) causes the breaker to open after the breaker completes its breaker operation. Designed. Since this design can be easily realized using conventional mechanical techniques, detailed illustrations and descriptions of its structure will be omitted. When both the disconnector and the circuit breaker are turned on, power from the power supply line (14) is transferred to the terminal (18b), the breaker fixed contact (18Q), and the breaker movable contact (18
d), breaker lower terminal (18a), disconnector movable contact (5), disconnector fixed contact (4), disconnector terminal (4a)
And power is supplied to the power receiving line (12). Further, the disconnector fixed contact (4) and the common terminal (18a) are located in substantially the same horizontal plane. The disconnector movable contact (5) has a maximum opening angle θ with respect to the horizontal plane, as shown by the dashed line.
The angle is set to about 60°, and by slanting the breaker portion (18), a sufficient spatial insulation distance is ensured between its tip and the breaker upper terminal (18b). The power switchgear shown in FIG. 2 is provided with a common terminal (18a) on a common support insulator (16), and uses this common terminal (18a) as one terminal of a disconnector. Since the structure is such that the breaker and the disconnector drive mechanism are supported at the tip of the common support insulator (16), the disconnector and the breaker can be simply connected in the conventional power switchgear shown in FIG. Disconnector drive mechanism (6)
A sufficient space insulation distance can be secured between the breaker and the upper terminal (18b), and the breaker support insulator (3) in the conventional one shown in Fig. 1 is not required, so the installation area can be sufficiently narrowed. Also, the installation work becomes easier as the disconnect support insulator (3) is no longer required.

Furthermore, when installing the disconnector and breaker, electrical connection work between the disconnector and the breaker can be done at the same time, and there is no need for additional materials, making the work even easier. Furthermore, both the disconnector drive shaft (21) and the circuit breaker drive shaft (19) are housed within the common support insulator (16).

Disconnector drive insulator (7) in the conventional type shown in Figure 1
The installation area is further reduced compared to a system in which the system is installed independently, and the installation work at the installation site becomes easier. Also,
In the conventional configuration shown in Figure 1, even if the installation location of the disconnector is different from the installation location of the breaker (9), there is no problem because the connecting wire (13) is usually flexible. However, in the switchgear shown in Figure 2, if the above heights are different, there is a possibility that unreasonable force will be generated in the mechanical connection and it will be difficult to close the disconnector. If they are all mounted on the common stand (15), the disconnector support insulator (2) and the tip common terminal (1
8a) can be easily aligned in the vertical direction regardless of the unevenness of the installation location, and there is no problem with alignment contact of the movable and fixed contacts (5) and (4) of the disconnector. Although the embodiment shown in FIG. 2 shows only one phase, in reality, power switchgears having the same configuration are arranged in parallel for three phases in the depth direction of the figure.

As described above, the present invention relates to a power switchgear comprising a disconnector and a breaker electrically connected to each other, in which the disconnector is attached to a pedestal and has a fixed contact and a terminal of the disconnector at its tip. A support insulator and a common support insulator attached to a pedestal are arranged substantially vertically (10) at a predetermined interval, and the movable contact of the disconnector is connected to and released from the fixed contact of the disconnector. The disconnector drive mechanism is supported on the tip of the common support insulator, and the breaking portion of the breaker is supported on the tip of the common support insulator, so the installation area of the power switchgear can be reduced. Moreover, it is possible to improve the workability of installation work, connection work, etc., and it is also possible to secure the necessary spatial insulation distance between the disconnectors, and the structure is simple, which is advantageous for transportation. Therefore, it is possible to obtain an inexpensive power switchgear including a disconnector and a circuit breaker that are electrically and mechanically connected to each other. Furthermore, by adopting the above configuration, it becomes possible to house both the disconnector drive shaft that operates the disconnector drive mechanism and the breaker drive shaft within the common support insulator, making it possible to further reduce the installation area. Become.

[Brief explanation of drawings]

FIG. 1 is a side view showing a conventional power switchgear, and FIG. 2 is a side view showing an embodiment of the power switchgear according to the present invention. In the figure, (2) is the disconnector support insulator, (4) is the fixed contact of the disconnector, (4a) is the terminal, (5) is the movable contact of the disconnector, (15) is the mount, and (16) is the disconnector. Common support insulator, (
18) Breaking part, (19) Breaker drive shaft, (21
) is a disconnector drive shaft, and (22) is a disconnector drive mechanism. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent: Patent Attorney Masuo Oiwa Procedural Amendment (
1. Indication of the case Japanese Patent Application No. 58-76706 2. Title of the invention: Power switchgear Explanation Column Drawing Surface 6, Contents of Amendment (1) Change the ``dashed line'' in the first line of page 3 of the specification to a 1-dotted chain line.''
I am corrected. (2) Page 3, line 17, “Shut-off operation mechanism (14)
Correct J to [breaker operating mechanism (11) J]. (3) Correct box 1 in the drawing as shown in the attached sheet. Above (2)

Claims (1)

[Scope of Claims] 1. A power switchgear configured by disposing a disconnector and a circuit breaker adjacent to each other and electrically connecting them, wherein the fixed contact of the disconnector and a A disconnector support insulator having a terminal and a common support insulator attached to a pedestal and having a drive mechanism at its tip for closing and opening a movable contact of the disconnector with respect to a fixed contact of the disconnector are separated at a predetermined interval. 2. A power switchgear, characterized in that the breaker is arranged substantially vertically, and the breaker of the breaker is provided at the tip of the common support insulator. 2. The movable contact of the circuit switch is an I:iT@contact which pivots around the drive mechanism, and the breaking part of the circuit breaker is tilted to the side opposite to the circuit breaker supporting insulator. A power switchgear according to claim 1, characterized in that: 3. A patent claim characterized in that the drive mechanism of the disconnector is actuated by a disconnector drive shaft within the common support insulator, and the breaking portion of the breaker is made to close and close by the breaker drive shaft within the common support insulator. A power switchgear according to items 1 and 2 of the range.