JPH02299405A - Compressed-gas-insulated switchgear - Google Patents

Abstract

PURPOSE:To shorten the length of connecting buses and to reduce an area for installation by arranging a main bus, connecting buses and a circuit breaker so that each projection line to the horizontal plane of the axis of the main bus or connecting buses and that of an arc extinguishing chamber container of the circuit breaker may mutually be inclined. CONSTITUTION:The projection lines to the horizontal plane of the axes X and Y of each main bus 1A and arc extinguishing chamber container 3 are arranged so as to be mutually inclined at an angle theta and connected from the main bus 1A to a circuit breaker 2 through a disconnector 5 and further to connecting buses 1E and the main bus 1A through the other disconnector 5. The conductor in the main bus 1A is bisected up and down and separated electrically. The two conductors are mutually connected electrically through the circuit breaker 2, etc. The rate for bypassing the circuit from the main bus 1A so as to set up the circuit breaker 2 will thereby be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a gas insulated switchgear, and particularly to the arrangement of circuit breakers and the like constituting the same.

[Conventional technology]

FIG. 9 is a single line diagram of the busbar segmentation unit, and the 1st O
The figure is a plan view showing a conventional gas insulated switchgear constituting the bus bar segmentation unit in Figure 9, and Figures 11 and 12 are taken along the 1θ diagram <7) XI-XI line and x■-xm line, respectively. FIG. In these figures, (IA), (
1B) is a cylindrical three-phase main busbar, which is installed horizontally on a pedestal (8) spaced apart from each other on the same straight line, and each has built-in conductors (not shown) for three phases. It is filled with sulfur hexafluoride (SF) gas. (2) is a phase-separated type circuit breaker for the bus bar section, which has a horizontally installed cylindrical arc extinguishing chamber container opening) and two branch pipes (4
). (IC).

(10), (IE) is the main bus (IB) and circuit breaker (2)
The connection bus bar that connects is filled with SF6 gas,
It is installed horizontally on a pedestal (8). (IC), (
10) is a three-phase-active type, and they are arranged adjacent to each other on the same straight line, and each has built-in conductors (not shown) for three phases, while (IE) is a phase separation type, and has built-in conductors for one phase. has been done. (51 is a disconnector provided between each of the main bus (IA) and connection bus (IC) and the circuit breaker (2), (6
) is the earthing switch installed in the disconnector (9), and (7) is the instrument transformer installed in the branch pipe (A) of the circuit breaker (2). of each axis X of the arc chamber container (3).

When Y is projected onto the horizontal plane, the lines are arranged at right angles to each other, and the main bus (IA) and the connection bus (IC)
) are arranged in parallel, and the arc extinguishing chamber container (3) and the connection busbar (IE) are arranged in parallel. Disconnector (5) from main bus (lA)
connected to one branch pipe (2) of the circuit breaker (2) via
The other branch pipe A) is sequentially connected to the connection bus (IC), (ID), (IE), and the main bus (IB) via another disconnector (51). From the main bus (IA), the circuit detours to the right in the figure and returns to the main bus (IB) by a dimension necessary to orthogonally arrange the circuit breaker (2).

Fig. 13 is a single-line connection diagram for the 1-break circuit breaker method <IHCB method), and Fig. 14 is a plan view of a conventional gas-insulated switchgear that configures the connection method shown in Fig. 13. 15 is a side view thereof. In these figures, (lA) and (IB) are main busbars similar to those in Fig. 10, which are installed parallel to each other and horizontally.

(2A), (2B), and (2C) are (2) in Figure 1O.
! circuit breakers similar to I, their arc extinguishing chamber vessels (3) are installed on the same horizontal line with each other, and their axis and main bus line (I
The projection lines of the axes A) and (IB) onto the horizontal plane are arranged at right angles to each other. (Ic), (ID),
(IE).

(IF) is the first O installed parallel to the arc extinguishing chamber container (3).
With the tangent generatrix similar to (IE) in the figure, they and the projection line of the axis of the arc extinguishing chamber container (3) onto the horizontal plane are arranged to be colinear with each other, and the circuit breakers (2A), (2B )
, (2C) Inter and main bus (IA), (IB)
connecting between. (51 is a disconnector, but the first
Illustrations are omitted in Figures 4 and 15, and earthing switches,
An instrument transformer and a mount are also used in the same manner as in FIGS. 1O to 12, but are not shown. (9) is a power cable that connects the busbar (
ID) and (IE) are connected to the center of each and pulled out to the outside. (11) is the circuit breaker (2A) to (2
In the inspection space C), the interior of the arc extinguishing chamber container (3) (not shown) can be inspected, or the built-in part (not shown) can be pulled out of the arc extinguishing chamber container (3). , the installation pitch of the circuit breakers (2A) to (2C) is increased to provide a sufficient distance from the cable head α0).

[Problem to be solved by the invention]

Conventional gas-insulated switchgear is constructed as described above, and is installed so that the projection lines of the axes of the main busbar, connection busbar, and circuit breaker arc extinguishing chamber container on the horizontal plane are on the same line, parallel, or at right angles. As a result, the length of the connection busbar becomes long and a large installation area is required, and in particular, when it is installed indoors, the building that houses it also becomes large.

This invention was made to solve the above-mentioned problems, and aims to provide a gas-insulated switchgear that can shorten the length of the connection ti and also can reduce the installation area.

[Means to solve the problem]

In the gas insulated switchgear according to the present invention, the main bus, the connection bus, and the circuit breaker are arranged such that the projection lines of the axis of the main bus or the connection bus and the axis of the arc extinguishing chamber container of the circuit breaker on a horizontal plane are inclined to each other. is arranged.

[For production]

In the gas insulated switchgear of this invention, the main bus bar and the circuit breaker are arranged so that the projection lines of the respective axes of the main bus bar and the arc extinguishing chamber container on the horizontal plane are inclined to each other. , the degree to which the circuit detours to the side of the main bus is small when connected in the order of the main bus, and
．． The two circuit breakers and the connection busbar are arranged so that the projection line of the axis of the arc extinguishing chamber container of the second circuit breaker onto the horizontal plane and the projection line of the axis of the connection busbar onto the horizontal plane are inclined to each other. Therefore, the first main bus, the first breaker, the connection bus,
When connecting the second circuit breaker and the second main bus in this order, narrow the circuit breaker installation pitch while avoiding interference between the circuit breaker inspection space and the cable head even if a cable head is provided on the connection bus. be able to.

[Embodiments of the invention]

An embodiment of the present invention will be described below.

FIG. 1 is a plan view of a gas insulated switchgear according to an embodiment of the present invention, showing the case where the bus bar segment unit of the single line diagram of FIG. 9 is constructed, and FIG. 2 is a side view thereof.
(IA), (IE), (2) to (8) are shown in Figures 10 to 1.
Similar to the case in Figure 2, the projection lines of the main bus line (IA) and the respective axes X and Y of the arc extinguishing chamber container (3) onto the horizontal plane are arranged so as to be inclined to each other at an angle of θ, Main bus (I
A) to the circuit breaker (2) via the disconnector (5), and
Connecting busbar (IE) via another disconnector ((5),
Connected to the main bus (IA). And Lord ta(I
The conductors (not shown) in A) are divided into upper and lower halves in FIG. 1 for each phase and electrically disconnected, and in the above connection order:
In other words, the two divided conductors (not shown) are connected to the circuit breaker (2
), etc. are electrically connected to each other.

By arranging as described above, the degree to which the circuit is detoured from the main bus bar (IA) to the right in the figure to install the circuit breaker (2) is reduced.

FIG. 3 is a plan view of a gas insulated switchgear according to another embodiment of the present invention, showing a case in which two units are constructed using the wiring method shown in FIG. 13, and FIG. 4 is a side view thereof. (IA
) ~ (IF), (2A) ~ (2C), (31, (4)
, [91, α0) are the same as those shown in FIGS. 14 and 15, so their individual explanations will be omitted. Main bus (IA),
(IB), connection busbar (IC).

(IF>) and the axes of the arc extinguishing chamber containers (3) of circuit breakers (2A) to (2C) are projected onto the same horizontal plane.
C), and from the connection bus (IC), the circuit breaker (2A), the connection bus <10), the circuit breaker (2B), the connection bus (IE), the circuit breaker (2C), the connection bus (IF ), the circuit breakers (2A
) to (2C), the adjacent ones are V-shaped. The connection buses (IC) to (IF) are arranged parallel to each other or on the same straight line. Finally, it is arranged to connect to the main bus (III) at right angles from the connection bus (IF).

Figure 5 shows the circuit breaker of the gas insulated switchgear shown in Figures 3 and 4 (
2A) to (2C) are plan views of the cable head α connected to the center of the connection bus (10).
Since it is off the extension line of the axis of the arc extinguishing chamber container B), it does not interfere with the inspection space (11), and the inspection space (11) can be shared by the adjacent circuit breakers (2A) and (2B). , the installation pitch between circuit breakers (2A) and (2B) can be narrowed. The same applies to the relationship between circuit breakers (2B) and (2C). In addition, the angle θ is the circuit breaker (2A)
An appropriate value is selected based on the branch pipe pitch P□, interphase pitch P2, etc. of ~(2C).

In the embodiments shown in FIGS. 3 to 5, adjacent circuit breakers (2A) to (
2C) were arranged in a V-shape, but in Figure 6 or 7.
As shown in the plan view of the figure, the circuit breakers (2A) to (2C) may all be arranged in parallel or on the same line.

In this case as well, cable head α [and inspection space <tl)
The two circuit breakers (2A) to (2C) do not interfere, and the inspection space for the two circuit breakers (2A) to (2C) can be shared.
) can narrow the installation pitch. Also, Figure 3~
Fig. 7 shows the case where the cable (9) is used to pull out the cable (9), but as shown in the side view of Fig. 8, the bushing (12
), the installation pitch of the circuit breakers (2A) to (2C) can be narrowed by the amount that the circuit breakers (2A) to (2C) are arranged at an angle.

In addition, in the embodiment shown in FIGS. 3 to 8, three circuit breakers (2A
) to (2C) are used, but the same effect can be obtained when, for example, two circuit breakers (2A) and (2B) are used.

〔Effect of the invention〕

As described above, according to the present invention, the main busbar or the connection busbar is arranged such that the respective projection lines of the axis of the main busbar or the connection busbar and the axis of the arc extinguishing chamber container of the circuit breaker on the horizontal plane are inclined to each other. Since the circuit breaker and circuit breaker are arranged, the degree to which the circuit detours to the side of the main bus bar is reduced, and the installation pitch of the circuit breaker can be narrowed. Therefore, the length of the connection bus bar is shortened, and This has the effect of reducing the installation area of the gas insulated switchgear.

[Brief explanation of drawings]

1 and 2 are a plan view and a side view, respectively, of a gas insulated switchgear according to one embodiment of the present invention, and FIGS. 3 and 4 are plan views, respectively, of a gas insulated switchgear according to another embodiment of the present invention. Figure 5 is a plan view of the circuit breaker and cable head of the gas insulated switchgear of Figure 4, and Figures 6 and 7 are plan views of gas insulated switchgear according to different embodiments of the present invention. 8 is a side view of a gas insulated switchgear according to yet another embodiment of the present invention, a single line diagram of the bus bar division unit of FIG. 9, and FIG. 10 is a plan view of a conventional gas insulated switchgear. Figures 11 and 12 correspond to XI-XI in Figure 10, respectively.
T! 13 is a single line diagram of the IHCB system, and FIGS. 14 and 15 are a plan view and a side view of other conventional gas insulated switchgear. In the figure, (IA) and (IB) are the main bus bars, and (IC)
~(IF) is the connection busbar, (2), (2A) ~(2C)
is a circuit breaker, (3) is an arc extinguishing chamber container, and X and Y are the main busbar and the axis of the arc extinguishing chamber container, respectively. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Masuo Oiwa, Patent Attorney Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 10

Claims (2)

[Claims] (1) In a circuit breaker consisting of a cylindrical main bus bar, a cylindrical arc extinguishing chamber container, and a cylindrical connection bus bar connecting these, the circuit breaker is filled with insulating gas, and the circuit breaker is connected to the main bus bar and arc extinguishing chamber. The main busbar and the circuit breaker are arranged so that the projection lines of the respective axes of the chamber container onto the horizontal plane are inclined to each other, and the main busbar, the circuit breaker, the connection busbar, and the main busbar are connected in this order. Gas insulated switchgear. (2) A circuit breaker consisting of a cylindrical main busbar, a cylindrical arc extinguishing chamber container, and a cylindrical connection busbar connecting these, the inside of which is filled with insulating gas, and the first , a second main busbar, first and second circuit breakers and a connection busbar disposed between the two main busbars, and on the horizontal plane of the axis of the arc extinguishing chamber of the first and second circuit breakers. The two circuit breakers and the connection busbar are arranged so that the projection lines of the axis of the connection busbar and the projection line of the axis of the connection busbar onto the horizontal plane are inclined to each other, and the first main busbar and the first interruption A gas insulated switchgear characterized in that a circuit breaker, a connection bus, a second circuit breaker, and a second main bus are connected in this order.