JPH0488813A - Gas-insulated switch - Google Patents

Abstract

PURPOSE:To lower the height of a circuit breaker for communicating a bus, to improve safety and to reduce the space of installation by juxtaposing two branch lead sections for communicating the bus in parallel with the longitudinal direction of a main bus in the lateral direction at 90 deg.. CONSTITUTION:Two branch lead sections 21a, 21b formed to a circuit breaker 21 for communicating a bus are led out mutually in the opposite direction in the lateral direction at 90 deg. in the longitudinal direction of the tank of the circuit breaker for communicating the bus. The branch lead sections 21a, 21b are juxtaposed in parallel with the longitudinal direction of an bus 2 and a bus 3. The branch lead section 21a is connected to a circuit breaker 4a for changing over buses having a lead section in the direction orthogonal to the longitudinal direction of the bus 2, a ground switch 5a for operation and the bus 2 through a connecting bus 22. Both connecting buses 22, 23 need not be laminated and arranged mutually, and the height of the circuit breaker 21 for communicating buses is made largely smaller than that of conventional devices.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Field of Application) The present invention provides a method for converting three phases into one power system, which is used in a power system having a bus connection line that connects two or four bus lines. This relates to a gas insulated switchgear housed in a container.

(Prior Art) FIG. 7 shows an example of a busbar connection method in a conventionally used three-phase lump-type gas insulated switchgear. In the figure, two busbars, namely a first busbar 2 and a second busbar 3, are connected by a busbar communication circuit breaker 1. This busbar communication circuit breaker 1 is connected to the busbar switching disconnectors 4a and 4b which are arranged branching from both the buses 2 and 3, so that the tank of the busbar communication circuit breaker 1 is arranged vertically. In this case, the branch outlet portions 1a, lb are 90° in the longitudinal direction of the tank.
°It has a U-shaped opening that can be pulled out horizontally in the same direction. In this case, the connecting bus 6 connects the bus switching disconnector 4b on the bus 3 side and the bus connecting circuit breaker 1.
is arranged above the busbar switching disconnector 4a on the side of the busbar 2 in order to secure an installation space.

Further, FIG. 8 shows an example of a busbar connection method in a gas insulated switchgear having a busbar communication line that connects four busbars. In the figure, four busbars, that is, a first busbar 16 and a second busbar 18 (in the figure, the back side of the first busbar 16) are connected by a busbar communication breaker 11 on the busbar side, and one , the first busbar 17 and the second busbar 19 (in the figure, the back side of the first busbar 17) are connected by a busbar communication breaker 12 on the busbar side.

In addition, these busbar communication circuit breakers 11.12 are connected to the busbar switching disconnectors 14a, 14b which are disposed branching from both the busbars 16 to 19, so that the respective branch outlet portions 11a, llb and 12a.

12b are each pulled out in the same direction at 90° transversely to the longitudinal direction of the tank. Further, the first K bus line 16, the second K bus line 18, and the first K bus line 1
7 and the second busbar 19 with busbar connection circuit breakers 11.12
A sub-generating line 20 is disposed parallel to the generating lines of the middle side and the two sides.

(Problems to be Solved by the Invention) However, the gas-insulated switchgear using the busbar connection method as described above has the following problems to be solved. That is, when the tanks of the busbar communication circuit breakers 1, 11, and 12 are arranged vertically in the case shown in FIGS. Since they are pulled out horizontally at 90 degrees in the same direction, their lead pitch 7 is regulated by the dimensions associated with the lamination. As a result, the busbar communication circuit breaker 1, 11゜12
Since the height h becomes large, the stability deteriorates and the installation space increases.

The present invention was proposed in order to eliminate the above-mentioned drawbacks, and the purpose is to reduce the height of the busbar communication circuit breaker, improve stability, and reduce installation space. Our objective is to provide a switchgear.

[Structure of the Invention (Means for Solving the Problems) The present invention provides power switchgear for three phases that is housed in a metal container filled with an insulating medium, and that connects the main busbars arranged in the device. In a gas-insulated switchgear equipped with a busbar communication circuit breaker, the two branch openings formed in the busbar communication circuit breaker are set at 90° with respect to the longitudinal direction of the tank of the busbar communication circuit breaker.
It is characterized in that it is drawn out in opposite directions in the lateral direction, and that these branch outlet portions are arranged parallel to each other in parallel to the longitudinal direction of the main generatrix.

(Function) In the gas insulated switchgear of the present invention, the branch outlet portion of the busbar communication circuit breaker is 90° with respect to the longitudinal direction of the tank.
° Laterally, because they are arched in opposite directions,
Since the installation position of the busbar switching disconnector installed between the main busbar can be shifted for each busbar, the connecting busbars that connect the busbar communication circuit breaker and the busbar switching disconnector can be stacked on top of each other. There is no need to place it. As a result, the height of the busbar communication circuit breaker can be significantly reduced compared to the conventional height.

(Example) Hereinafter, an example of the present invention will be specifically described based on FIGS. 1 to 6.

■First Example In this example, as shown in Figures 1 to 3,
Two branch outlet portions 21a and 21b formed in the busbar communication circuit breaker 21 are drawn out in opposite directions to each other at a 90" lateral direction with respect to the longitudinal direction of the tank of the busbar communication circuit breaker. The branch outlet portions 21a and 21b are arranged parallel to each other in the longitudinal direction of the two main busbars, that is, the first busbar 2 and the second busbar 3.The branchoutlet portions 21a are connected to each other via the connection busbar 22. A busbar switching disconnector 4a having an outlet in a direction perpendicular to the longitudinal direction of the upper busbar 2
, is connected to the work earthing switch 5a and the upper bus bar 2. On the other hand, the branch outlet portion 21b is connected to the busbar switching disconnector 4b, which has an outlet in a direction perpendicular to the longitudinal direction of the second busbar 3, the work earthing switch 5b, and the first busbar 3 via the connection busbar 23. has been done.

In this embodiment, voltage transformers 6a and 6b are disposed between the busbar switching disconnectors 4a and 4b of the busbar connection line.

In the gas insulated switchgear of this embodiment having such a configuration, the branch outlet portion 21a of the busbar communication circuit breaker 21,
21b is 9 in the longitudinal direction of the tank of the busbar communication circuit breaker.
Since they are pulled out in opposite directions in the lateral direction, it is possible to shift the installation positions of the busbar switching disconnectors 4a and 4b provided on the first busbar 2 and the second busbar 3. Circuit breaker 21 and busbar switching disconnectors 4a, 4
It is no longer necessary to stack the connection busbars 22 and 23 that connect the busbars 22 and 23, and the height H of the busbar communication circuit breaker 21 can be reduced.
l can be significantly reduced compared to the conventional height h. As a result, it is suitable for installation in underground substations, etc., where equipment installation height is restricted. Furthermore, since the height is reduced, stability is improved and installation space can be reduced.

In addition, in this embodiment, since the instrument transformers 6a and 6b are arranged between the busbar switching disconnectors 4a and 4b of the busbar connection line, the dimensions of the main busbar of the line needle are compounded. It is possible to improve efficiency by doing this.

2. Second Embodiment In this embodiment, the present invention is applied to a bus link line connecting four bus lines. That is, as shown in FIGS. 4 to 6, the first busbar 32 and the second busbar 34 are connected by the busbar communication circuit breaker 30 on the busbar side, and on the other hand,
The first busbar 33 and the second busbar 35 are connected by a busbar communication breaker 31 on the busbar side. Further, two branch outlet portions 30a, 30b and 31a are formed on each of these bus bar communication circuit breakers 30 and 31.

31b are drawn out in directions opposite to each other in a direction 90' transverse to the longitudinal direction of the tank of the busbar communication circuit breaker.

Further, the branch outlet portions 3'Oa, 30b are arranged parallel to each other in the longitudinal direction of the first back bus line 32 and the second back bus line 34, and the branch outlet portions 31a, 31b
The second bus line 33 and the second bus line 35 are arranged parallel to each other in the longitudinal direction. The branch outlet portion 30a is
A busbar switching disconnector 4a having an opening in a direction perpendicular to the longitudinal direction of the first upper busbar 32 is connected via the connection busbar 36a.
, is connected to the work earthing switch 5a and the first upper bus bar 32. On the other hand, the branch outlet portion 30b is connected to the connection bus bar 36.
It is connected to the busbar switching disconnector 4a having an opening in a direction perpendicular to the longitudinal direction of the second upper busbar 34, the work earthing switch 5a, and the second upper busbar 34 via b. Further, the second bus line is also configured in the same manner.

In the gas insulated switchgear of this embodiment having such a configuration, the branch outlet portions 30a and 30b of the busbar communication circuit breaker 30 on the upper busbar side are oriented at 90° horizontally with respect to the longitudinal direction of the tank of the busbar communication circuit breaker. Since they are pulled out in opposite directions, the busbar switching disconnectors 4a are disposed on the first busbar 32 and the second busbar 34, which are arranged on the same axis.
4a can also be arranged on the same axis and at the same height. The same applies to the bus line side.

In this way, also in this embodiment, the busbar communication circuit breaker 30
．． 31 and the busbar switching disconnectors 4a, 4b, there is no need to stack the connection buses 36a, 36b or 37a, 37b on top of each other.
The height H2 of 31 can be significantly reduced compared to the conventional height h. 'As a result, it is suitable for installation in underground substations, etc., which are subject to restrictions on the installation height of equipment.

Furthermore, since the height is reduced, stability is improved and installation space can be reduced.

[Effects of the Invention] As described above, according to the present invention, the two branch openings formed in the busbar communication circuit breaker are arranged at 900° in the transverse direction with respect to the longitudinal direction of the tank of the busbar communication circuit breaker. By pulling out in opposite directions and arranging these branch outlets parallel to the longitudinal direction of the main busbar, it is possible to reduce the height of the busbar communication circuit breaker and improve stability. Also, it is possible to provide a gas insulated switchgear with reduced installation space.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a first embodiment of the gas insulated switchgear of the present invention, FIG. 2 is a side view taken along line A-A in FIG. 1, and FIG.
4 is a plan view showing the second embodiment of the gas insulated switchgear of the present invention, FIG. 5 is a side view taken along C-C of FIG. 4, and FIG. 6 is a side view of FIG. DD side view, Figures 7 and 8
The figures are side views showing an example of a conventional gas-insulated switchgear, with FIG. 7 showing an example of a double-bus configuration, and FIG. 8 showing an example of a four-bus configuration. 1...Bus bar communication circuit breaker, la, lb...branch exit part, 2...A bus bar, 3...A bus bar, 4a, 4b.
...Disconnector for busbar switching, 5a, 5b...Earth switch for work, 6...Connection busbar, 7...Output pitch, 11
．． 12...Busbar communication circuit breaker, lla, llb, 12
a, 12b... Branch outlet portion, 14a, 14b...
Disconnector for bus bar switching, 15a, 15b...Working earthing switch, 16...First A bus bar, 17...First A bus bar, 18...Second A bus bar, 19. ...Second busbar, 20...Subbusbar, 21...Busbar communication circuit breaker, 2
1a, 21b... Branch outlet, 22.23... Connection busbar, 30... Busbar communication circuit breaker on the first busbar side, 30a
, 30b... Branch outlet part, 31... Bus bar side bus communication circuit breaker, 31a, 31b... Branch outlet part, 3
2...First A bus line, 33...First A bus line, 34
...Second A bus line, 35...Second A bus line, 36a
, 36b...connection busbar, 37a, 37b...connection busbar.

Claims (1)

[Claims] A gas-insulated switchgear in which power switchgear for three phases is housed in a metal container filled with an insulating medium, and a busbar communication circuit breaker is provided between the main busbars disposed within the device. In the device, two branch outlet portions formed in the busbar communication circuit breaker are arranged at 9 points with respect to the longitudinal direction of the tank of the busbar communication circuit breaker.
A gas insulated switchgear characterized by being drawn out in opposite directions at 0° in the lateral direction, and in which these branch outlet portions are arranged in parallel to each other in parallel to the longitudinal direction of the main bus bar.