JPH01291610A - Gas insulated switchgear - Google Patents

Abstract

PURPOSE:To reduce the installation space by additionally providing a line side unit to be arranged intermediately thereby simplifying the structure even when a disconnecting switch is inserted. CONSTITUTION:A circuitbreaker unit 1 and line side unit 11 to be arranged intermediately are connected through a three-phase insulating spacer 12. Conductor connecting sections are arranged on the opposite side faces of the container for the line side unit 11 and three-phase connecting conductors are arranged horizontally. Connection between the line side unit 11 to be arranged intermediately and an end side unit 3 is made, similarly to connection between the circuitbreaker unit 1 and the line side unit 11, through three-phase insulation spacers 12 having inner electrodes arranged at right angle with the upper section thereof being placed at the top. By such an arrangement, the structure is simplified when compared with prior art where conductor connecting sections are provided in two different directions in the circuitbreaker unit or a branch bus is connected.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Field of Application) The present invention relates to the structure of a line side unit of a three-phase live line small gas insulated switchgear, and in particular, the present invention relates to the structure of a line side unit of a three-phase live line small gas insulated switchgear, and in particular, The present invention relates to an improved technology for the arrangement and configuration of track side units when multiple strips are drawn in.

(Prior Art) FIG. 4 shows a sectional view of a typical conventional three-phase live wire small gas insulated switchgear.

In FIG. 4, reference numeral 1 denotes a circuit breaker unit, in which a circuit breaker 4 and a work earthing switch 5 are housed. Reference numeral 2 indicates the line side units 1 to 1, in which a line disconnector 6, a line grounding switch 7, and a cable sealing head 8 are housed. Reference numeral 3 denotes a bus disconnector unit, which is a busbar-integrated disconnector in which the busbar side disconnector 9 and the main busbar 10 are housed in the same container. This arrangement is advantageous in that the necessary components are compactly combined as a circuit breaker unit and a line side unit, so the connecting conductor is short and the installation space can be reduced.

(Problem to be solved by the invention) However, the configuration of FIG.
It is impossible to directly apply it when connecting multiple power cables as shown in the single line diagram in the figure, and the second
It is necessary to provide a second line-side unit for connecting the power cable.

In this case, in order to add the second track side unit,
Furthermore, it is necessary to add a means for connecting this unit to the circuit breaker unit, which results in the problem of complicating the configuration and expanding the installation space.

That is, the single line diagram in Figure 5 connects a plurality of power cables to one circuit breaker CB, and connects the disconnector DS and ground between the circuit breaker CB and the cable sealing head CH of each power cable. This is a circuit in which a switch ES is inserted, but when applying the arrangement shown in FIG. It is required to connect the line disconnectors of the two track side units. In this case, the specific arrangement is such that the circuit breaker unit 1 is provided with conductor connections in two different directions for the first line side unit 2 and the second line side unit, and the line side units are connected to each. Alternatively, a configuration in which a two-branch branch bus bar is connected to the conductor connection part of the circuit breaker unit 1 and a line side unit is connected to each branch is possible, but in either configuration, the connection configuration and arrangement configuration becomes complicated. Furthermore, since two track side units are arranged in parallel to the circuit breaker unit 1, there is also the problem that the installation space is expanded.

The present invention was devised in order to solve the problems of the prior art, and its purpose is to solve the problems of the prior art even when there are multiple power cables and a disconnector is inserted in each power cable. To provide an excellent gas insulated switchgear that has a simple structure and does not waste installation space.

[Structure of the Invention] (Means for Solving the Problems) The gas insulated switchgear of the present invention includes, as a track side unit,
Two types of track side units are used, one for end placement and one for intermediate placement.For the line side unit for intermediate placement, conductor connections are provided on both sides of the container, and conductor connections on both sides are provided. Conductors for 3 phases are arranged horizontally between them, and 3
Both ends of the phase conductors have the same triangular arrangement as the internal electrodes of the three-phase insulating spacer, and by bending at least one phase conductor among the three-phase conductors, the three-phase conductors can be bent. The central parts are arranged in parallel on the same horizontal plane, and the movable electrodes of the disconnector are installed on each horizontal parallel part of the conductors for these three phases so that the operating axis is in the vertical direction and they are arranged on the same horizontal plane. This is a feature of the composition.

(Function) In the present invention having the above configuration, the circuit breaker unit, the line-side unit for intermediate placement, and the line-side unit for end placement can be arranged linearly and connected in sequence.
Even in a gas insulated switchgear in which there are multiple electric cables and a disconnector is inserted into each electric cable, the structure can be simplified and the installation space is not wasted. Furthermore, by connecting a plurality of track side units for intermediate placement of the present invention and attaching a track side unit for end placement at the extreme end, three
A large number of power cables can be drawn in.

(Example) An example of the present invention is shown in FIG. 1 below. Here, the first
The present embodiment shown in the figure has a configuration in which a line-side unit 1 for intermediate placement is inserted between the circuit breaker unit 1 and the line-side unit 2 for end placement in the conventional example shown in FIG. ing. Therefore, the configurations of the circuit breaker unit 1, the line side unit 2 for end arrangement, and the busbar disconnector unit 3 are exactly the same as the configurations of each unit 1 to 3 in FIG. , the line-side unit 11 for intermediate arrangement will be mainly explained.

That is, in FIG. 1, the circuit breaker unit 1 and the line-side unit 11 for intermediate arrangement are connected via the three-phase insulating spacer 12. The three-phase internal electrodes 13 (13a to 13C) of the three-phase insulating spacer 12 are arranged in a right-angled triangular shape with an apex at the top, as shown in FIG. There is.

The line-side unit 11 for intermediate arrangement is provided with conductor connection parts on both side surfaces of the container, and between the conductor connection parts, connection conductors 14 (14a to 14C) for three phases are arranged horizontally. ing. Connection conductor 14 (1
4a to 14C) are connected to the three-phase insulating spacer 12.
It has the same triangular arrangement as the internal electrodes 13 (13a to 13C). In addition, connection conductors 14 (14a to 1
4C), by bending the connecting conductors 14a and '14G for two phases corresponding to both ends of the base of the right triangle upward, these connecting conductors 14a and '14c are connected to the remaining part corresponding to the apex. The height of the connecting conductor 14b for one phase is matched with the height of the connecting conductor 14b for one phase, and therefore, the central portions of the connecting conductors 148 to 14G for three phases are on the same horizontal plane as shown in FIG. 3, which is a view in the Y direction of FIG. are lined up parallel to. Roughly speaking, movable disconnectors +m15 are attached to each horizontally parallel portion of the three-phase connecting conductors 14a to 14G so that the operating axis is in the vertical direction and they are aligned on the same horizontal plane.

A fixed type disconnector for three phases (16) is arranged at a position facing each disconnector movable electrode, and a disconnector for three phases is configured.

On the other hand, as shown in FIG. 1, the connection between the line side unit 11 for intermediate placement and the line side unit 3 for end placement is the same as the connection between the circuit breaker unit 1 and the line side unit 11 for intermediate placement. Similarly, they are connected via a three-phase insulating spacer 12 having internal electrodes 13 (13a to 13C) arranged in a right triangular shape with the top as the apex.

In this embodiment with the above configuration, compared to the conventional technology, there is no need to provide conductor connections in two different directions in the circuit breaker unit or to connect two branch busbars, so the configuration is simpler. It is simple, and instead of arranging two track-side units in parallel with the breaker unit, the breaker unit and two track-side units can be arranged in a straight line, eliminating wasted installation space. ing. Roughly speaking, the intermediate track side unit in the above embodiment is as follows:
Since a plurality of units can be connected in series, it is extremely effective even when configured to draw in three or more power cables.

Note that the present invention is not limited to the above embodiments,
For example, the arrangement structure of the insulating spacers is not limited to the shape of a right triangle with the top as the apex;
Alternatively, a triangular arrangement with one side of the left and right as the apex is also possible.

[Effects of the Invention] As explained above, in the present invention, a conventional circuit breaker unit, a line side unit for end placement, and a busbar disconnector unit are used as they are, and a new line side unit for intermediate placement is created. Due to the simple configuration of just adding a power cable, even when there are multiple power cables and a disconnector is inserted in each power cable, the structure is significantly simplified compared to the conventional method, and the installation space can be greatly reduced. It is possible to provide an excellent gas insulated switchgear.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of a gas insulated switchgear according to the present invention, FIG. 2 is a view taken in the direction of the X arrow in FIG. 1, FIG. 3 is a view taken in the direction of the Y arrow in FIG. 1, and FIG. FIG. 5 is a sectional view showing a conventional gas insulated switchgear, and is a single line connection diagram when two electric cables are drawn in. DESCRIPTION OF SYMBOLS 1... Circuit breaker unit, 2... Track side unit for end arrangement, 3... Busbar disconnector unit, 4... Circuit breaker, 5... Working earth switch, 6...・Line disconnect switch, 7... Line grounding switch, 8... Cable sealing head, 9... Busbar side disconnector, 10... Main bus, 11... Track side unit, 12. ... Three-phase insulating spacer, 13... Spacer internal electrode, 14... Connection conductor, 15... Disconnector movable electrode, 16... Disconnector fixed electrode.

Claims (1)

[Scope of Claims] A circuit breaker unit having a three-phase cutoff part in a vertical container and a conductor connection part on the side surface of the container, and a disconnector and a cable sealing head in the container. In a gas insulated switchgear, the line side unit is connected via a three-phase insulating spacer having internal electrodes arranged in a triangular arrangement, wherein the line side unit includes a line side unit for end positioning and a line side unit for intermediate positioning. Two types of side units are used, and for the line side unit for end placement, a conductor connection part is provided on the breaker side side of the container, and three-phase conductors for connection are provided in this conductor connection part, The conductors for these three phases are placed in the same triangular arrangement as the internal electrodes of the three-phase insulating spacer, and for the intermediate line side unit, conductor connection parts are provided on both sides of the container, and between the conductor connection parts on both sides. Conductors for three phases are arranged horizontally, and both ends of the conductors for three phases are arranged in the same triangle as the internal electrodes of the three-phase insulating spacer. By bending the conductors, the center portions of the conductors for the three phases are arranged parallel to each other on the same horizontal plane, and each horizontal parallel portion of the conductors for the three phases has the vertical direction as the operating axis direction and A gas-insulated switchgear characterized by having movable electrodes of a disconnector mounted so as to be lined up on a horizontal surface.