JPH10191514A - Gas insulation switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily repair an equipment by withdrawing an equipment tank outside an enclosure. SOLUTION: A connection tank 14 that communicates with an equipment tank 13 is connected to nearly a center at the upper part of the equipment tank 13 for accommodating a cable head 19 and a circuit breaker 18, a bus tank 15 for accommodating a bus 24 is connected to the right or the left of the connection tank 14 via an insulation spacer 17, and an insulation gas is filled into the equipment tank 13 and the bus tank 15 individually. In this manner, the bus tank is connected to the equipment tank via the connection tank, thus withdrawing the equipment tank individually from an enclosure by removing the connection tank from the equipment tank and the bus tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a structure of a tank in a gas insulated switchgear.

[0002]

2. Description of the Related Art The structure of a conventional gas insulated switchgear is shown in FIG. As shown in the figure, a tank 4 and a tank 1 which are formed airtight and filled with an insulating gas are provided inside a housing 9. The tank 4 is configured by connecting the unit 4a and the unit 4b at a position indicated by a two-dot chain line. Tank 4
A circuit breaker 5 having a built-in vacuum interrupter is accommodated therein, and a cable head 7 is connected to the circuit breaker 5 via a disconnector 6, while a bus 3 in the tank 1 is connected to the circuit breaker 5 via a disconnector 2. It is connected to the. The cable head 7 is connected via a cable 8 to a substation (not shown) for sending power.

In such a gas-insulated switchgear, a flash accident occurs in the tank 4 and the internal equipment, main circuit conductors, and the like may be damaged. In such a case, it is desired to pull out only the tank 4 out of the housing 9 while leaving the tank 1 and perform an operation such as replacement of a part. However, the tank 1 and the tank 4 share a part of the part. Therefore, only the tank 4 cannot be pulled out while keeping the airtightness of both tanks.

For this reason, the connecting portion between the tanks 1 in the gas insulated switchgear, which is connected in a row in a row along the direction perpendicular to the paper surface of FIG. 5, is disconnected, and the bus 3 perpendicular to the paper surface is disconnected. After removing the conductor connecting the disconnecting device 2 and the conductor connecting the disconnecting switch 2 and the circuit breaker 5, the connection between the combined plate 1a and the equipment tank 4 and the connection between the cable head 7 and the cable 8 are removed. Then, the bus tank 1 is slightly lifted, and the equipment tank 4 is pulled out of the housing 9 from the left side in FIG.

[0005] When the repair or replacement of the equipment in the equipment tank 4 outside the housing 9 is completed, the gas insulated switchgear is assembled in the reverse procedure.

[0006]

However, since the work of disconnecting the equipment tank from the busbar tank and pulling it out of the housing is troublesome, repair after a flash accident inside the equipment tank is enormous. It takes effort and time.

Therefore, an object of the present invention is to provide a gas insulated switchgear which solves the above problem.

[0008]

According to a first aspect of the present invention, there is provided a gas insulated switchgear having a structure in which a gas insulated switchgear is provided at a substantially central portion above a device tank accommodating a cable head and a circuit breaker. The connection tank that communicates with the tank is connected, the bus tank that houses the bus is connected to the right or left of the connection tank via an insulating spacer, and the equipment tank and the bus tank are individually filled with insulating gas. And

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

The configuration of the gas insulated switchgear according to the present invention is as follows:
This is shown in FIGS. As shown in FIG. 1, the gas insulated switchgear includes an equipment tank 13 and a connection tank 1 inside a housing 10.
4, which is configured to house the bus bar tank 15. As shown in FIG. 2, the equipment tank 13 and the connection tank 14 arranged at the center above the equipment tank 13 are connected with connection plates 13a, 14a formed on the respective tanks via bolts (not shown). It is integrated.

On the right side of the connection tank 14, a busbar tank 15
Are arranged, and the connection tank 14 and the bus bar tank 15 are integrated by connecting the connection plate 14b and the connection plate 15a via the insulating spacer 17 in the same manner as described above. The left side of the connection tank 14 is closed by attaching a lid 16 to the connection plate 14c. In addition, bus bar tank 1
5 may be disposed on the left side of the connection tank 14 instead of on the right side as shown in FIG.

A circuit breaker 18 and a cable head 19 for connecting a cable are accommodated in the equipment tank 13, and the cable head 19 is connected to the circuit breaker via a main circuit conductor 20, a ground switch 21, and a disconnector 22. 18. As shown in FIG. 2, the cable head 19 is inserted into the mounting hole 13c of the connection plate 13b mounted on the equipment tank 13, and the circuit breaker 18 is mounted at a position corresponding to the through hole 13e of the connection plate 13d. 23 is a support insulator.

On the other hand, as shown in FIG. 2, a pair of connecting plates 15b are provided in the bus tank 15 at positions facing each other, and buses 24 for three phases are inserted into holes of the connecting plates 15b.
Each bus 24 is connected to the circuit breaker 18 via the disconnector 25, the main circuit conductors 11, and the main circuit conductors 26 and 27 which pass through the insulating spacer 17 in an airtight manner.

An operating means 28 is attached to the outside of the equipment tank 13, and the operating means 28 is operatively connected to the circuit breaker 18 via an insulating rod which passes through the through hole 13e in an airtight manner.

The gas insulated switchgears 26 configured as described above are arranged in a row along the horizontal direction as shown in FIG. At this time, the busbar tanks 15 in the adjacent gas insulated switchgears 26 are connected to each other by connecting the connection plates 15b, and a straight line 3 is formed in the long hole formed in the connection plate 15b. The two buses 24 will be inserted.

The three tanks constituting the gas insulated switchgear 26 are connected by bolts via gas seal packing. As described above, the insides of the bus tank 15, the device tank 13 including the connection tank 14, and the case 18 are airtightly configured, and the three spaces are individually filled with insulating gas.

Next, the operation of the gas insulated switchgear will be described. In order to pull out the device tank 13 from the housing 10, first, the insulating gas in the device tank 13 and the connection tank 14 is extracted and air is injected. Next, as shown in FIG. 4A, the lid 16 is removed from the connection tank 14, and the main circuit conductor 26 in the equipment tank 13 is taken out. Thereafter, as shown in FIG. 4B, the connection tank 14 is connected to the insulating spacer 17 and the connection tank 14 is connected to the device tank 13.
And the connection tank 14 is removed. As a result, the tank is separated from the other tanks, so that the device tank 13 can be moved in the horizontal direction and pulled out of the housing 10. After replacing or repairing the equipment in the equipment tank 13, the gas insulated switchgear is assembled in the reverse procedure.

[0018]

As can be seen from the above description, claim 1
According to the gas-insulated switchgear according to the above, since the bus tank is connected to the equipment tank via the connection tank, by removing the connection tank from the equipment tank and the bus tank, the equipment tank can be pulled out of the housing by itself. it can. Therefore, when a flashover accident occurs in the equipment tank, operations such as replacement and repair of the equipment in the equipment tank can be easily performed.

Further, when the gas insulated switchgear is added, only the bus tank is installed first, and then the equipment tank and the like can be attached. Therefore, the gas insulated switchgear can be easily added.

[Brief description of the drawings]

FIG. 1 is a sectional view of a gas-insulated switchgear according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view of FIG.

FIG. 2 is a perspective view showing a configuration of a tank in the embodiment of the gas insulated switchgear according to the present invention.

FIG. 3 is a perspective view of a gas-insulated switchgear according to an embodiment of the present invention, which is shown in a row structure.

FIG. 4 is an operation explanatory view in the embodiment of the gas insulated switchgear according to the present invention.

FIG. 5 is a configuration diagram of a conventional gas insulated switchgear.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 13 ... Equipment tank 14 ... Connection tank 15 ... Bus tank 17 ... Insulating spacer 18 ... Circuit breaker 19 ... Cable head 24 ... Bus

Claims (1)

[Claims] A connection tank communicating with an equipment tank is connected to a substantially central portion above an equipment tank containing a cable head and a circuit breaker, and a bus tank containing a bus is connected to the right or left of the connection tank. A gas-insulated switchgear, wherein the gas-insulated switchgear is connected via an insulating spacer, and the device tank and the busbar tank are individually filled with insulating gas.