JPH0427648B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a gas shield or breaker for gas insulated switchgear, and particularly to a vertical gas shield or breaker in which a grounded tank is vertically arranged.

[Prior art] As a gas shield disconnector, for example, a ground tank filled with an insulating gas and at ground potential is arranged almost vertically, and a shield section is placed inside the ground tank in the axial direction of the ground tank. It is stored. This type of gas shield disconnector has an inspection window on the circumference of the grounded tank for inspecting the critical part of the shield.

[Problem to be solved by the invention]

The above conventional technology requires a space for installing the inspection window itself and a space for inspection work through the inspection window, so when constructing a gas insulated switchgear using this gas shield and disconnector, As the installation area of gas-insulated switchgear increases, the axial length of the busbars that make up the gas-insulated switchgear also increases.
There was a problem that the entire device was expensive.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gas shield disconnector that allows inspection of the shield section and reduces the installation area when configured as a gas insulated switchgear.

[Means to solve the problem]

In order to achieve the above object, the present invention disposes a ground tank filled with an insulating gas and is at a ground potential almost vertically, houses a sheath section inside the ground tank, and covers an upper end of the ground tank. The fixed contact of the shingle section is supported through an insulating support, and a fixed contact side conductor provided on the fixed contact and a bus conductor arranged substantially horizontally in the radial direction of the ground tank are connected. In an electrically connected gas tank or disconnector,
removably attaching the upper end cover to the grounded tank;
The fixed contact side conductor is provided with an end parallel to the axis of the grounding tank, the busbar conductor is provided with an end opposite to the end of the fixed contact side conductor, and the fixed contact side conductor and the busbar conductor are connected to each other. A tube-shaped current collector or an electrode that fits into contact with the current collector is provided at either end of the current collector.

[Effect]

By lifting the upper end cover upward from the ground tank, the fixed contact attached to the upper end cover and the fixed contact side conductor provided thereon can be taken out from the ground tank. At this time, the end of the fixed contact side conductor and the end of the bus conductor can be separated by the connection structure between the electrode and the tube-shaped current collector. This makes it possible to inspect the fixed contacts in the shingle section and the possible contacts from the top opening of the ground tank. Furthermore, assembly is possible by performing the reverse operation to that described above. As a result, the contacts can be easily inspected, and an inspection window is no longer necessary, allowing the installation area to be reduced.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the invention, in which a grounded tank 1 brought to ground potential is arranged vertically. This grounded tank 1 is filled with an insulating gas such as SF ₆ , and a sheath section is housed in the atmosphere parallel to the axis of the grounded tank 1. This fold section is the fixed contact 4
and a movable contactor 10. The fixed contact 4 is attached via an insulating support 3 to the inner wall of an upper end cover 2 which is removably provided in the upper opening of the grounded tank 1. The movable contact 10 is attached to the lower end cover of the grounded tank via an insulating support 11, facing the fixed contact 4 described above. A fixed contact side conductor 5 is attached to the fixed contact 4. This fixed contact side conductor 5 has an end parallel to the axis of the ground tank 1, and an electrode 6 at this end. One of the bus conductors 8 connected to the fixed contact side conductor 5 extends in the radial direction of the ground tank 1 and is supported by an insulating spacer 9 at one side opening of the ground tank 1 . Further, the other bus conductor 8 has an end opposite to the end of the fixed contact side conductor 5 described above. This end is provided with a tulip-shaped current collector 7 which is in mating contact with the electrode 6. This tube-shaped current collector 7 and the electrode fitted therewith enable the fixed contact side conductor 5 and the bus conductor 8 to be connected to and separated from each other. The bus conductor 12 connected to the movable contact 10 extends in the radial direction of the ground tank 1 in the opposite direction to the bus conductor 8 described above, and is connected to the other side opening of the ground tank 1 by an insulating spacer 13. Supported.

Next, the operation of the embodiment of the present invention described above will be explained.

Fixed contact 4 and movable contact 10 in the sheath section
When inspecting the condition of the tank, first, the fixation of the upper end cover 2 to the grounded tank 1 is released. Next, as shown in FIG. 2, the upper end cover 2 is lifted upward.
Thereby, the insulating support 3 fixed to the upper end cover 2, the fixed contact side conductor 5, the electrode 6, etc. can be taken out from the inside of the grounded tank 1. As a result, the fixed contact 4 can be inspected.
Furthermore, the movable contact 10 can be inspected by removing the movable contact 10 from the upper end opening of the ground tank 1 using a jig.

Assembling after inspection is possible by performing the reverse operation to that described above. At this time, the connection is completed by fitting the fixed contact side conductor 5 and the electrode 6 of the bus conductor 8 to the tube-shaped current collector 7.

In the above-described embodiment, the electrode 6 was provided at the end of the fixed contact side conductor, and the tube-shaped current collector 7 was provided at the end of the bus conductor 8, but they may be attached in the opposite manner.

〔Effect of the invention〕

According to the present invention, there is no need to provide an inspection window for the shield section of the gas shield and disconnector in the ground tank, so when a gas insulated switchgear is constructed, the installation area can be reduced, and the installation area can be reduced. It is also possible to inspect the sheath section. Moreover, by omitting the above-mentioned inspection window, the structure of the grounded tank can be simplified and its mechanical strength can also be improved.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a gas shield and disconnector according to an embodiment of the present invention, and FIG. 2 is a partial cross-sectional view showing the state of the gas shield and disconnector of the present invention shown in FIG. 1 during inspection. . DESCRIPTION OF SYMBOLS 1... Ground tank, 2... Upper end cover, 4... Fixed contact, 5... Fixed contact side conductor, 6... Electrode, 7... Tulip type current collector, 8... Bus bar conductor.

Claims (1)

[Claims] 1. A grounded tank filled with an insulating gas and at ground potential is arranged almost vertically, a sheath section is housed inside the grounded tank, and the sheath section is connected to the upper end cover of the grounded tank via an insulating support. A gas shield or disconnector that supports a fixed contact at a disconnected portion and electrically connects a fixed contact side conductor provided on the fixed contact to a bus conductor arranged substantially horizontally in the radial direction of the ground tank. , the upper end cover is removably attached to the ground tank, the fixed contact side conductor is provided with an end parallel to the axis of the ground tank, and the bus bar conductor is opposite to the end of the fixed contact side conductor. 1. A gas shield and disconnector characterized in that a tube-shaped current collector or an electrode that fits into contact with the current collector is provided at either end of the fixed contact side conductor and the bus bar conductor.