JPH0620331B2 - Gas insulated switchgear - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas insulated switchgear installed in an electric station such as a substation.

2. Description of the Related Art A gas-insulated switchgear is a device in which a switch, a disconnector, a grounding device, and other devices necessary for forming a switch circuit are housed in a container filled with an insulating gas such as SF ₆ . FIG. 1 is a single wire connection diagram showing an example of the electrical configuration of the gas insulated switchgear, in which LA surge arrester, VD is a voltage detection device, ES
W ₁ ~ESW ₃ is grounded device, DS _1, DS ₂ is disconnector, a CB chopsticks and disconnection unit, they are housed in an airtight container 1 filled with SF ₆ gas. Chd is a cable head and BS is a bushing, which are supported on the side wall of the container 1 or the like. In this type of gas insulated switchgear, breaker,
For devices that require operations such as disconnectors and grounding devices, an operating device that uses a pneumatic cylinder or the like as a drive source is provided, but in the past, because each device was provided with an operating device individually, The number of actuators is increased, the structure is complicated, and the gas-insulated switchgear is large.

OBJECT OF THE INVENTION The object of the present invention is to reduce the number of operating devices by operating two disconnecting devices arranged on both sides of the sushi and disconnecting device with a common operating device. It is to provide an insulating switchgear.

Configuration of the Invention The present invention relates to a shakushi breaker, first and second disconnectors connected to each other through the shushi breaker, and the shushi breaker and the first breaker.
A gas-insulated switchgear comprising: a container for accommodating a second disconnecting switch and a container filled with an insulating gas therein; and, in the present invention, a common disconnecting switch for the first and second disconnecting switches. A manipulator for operation is provided, and an output lever of the manipulator is connected to the operation levers of the first and second disconnectors via first and second links, respectively. At least one of the first and second links is arranged outside the container so as to be separated from at least one of the output lever and the operation lever.

With the above configuration, two disconnecting switches can be operated by one operating device, so that the number of operating devices can be reduced. Since the two disconnecting switches on both sides of the shishing switch are opened and closed at the same time in a normal operating state, there is no problem even if they are operated by a common operating device as described above.
When applying a voltage for a withstand voltage test of a circuit breaker, it is necessary to close only one of the circuit breakers. For example, in the case of performing a withstand voltage test of the circuit breaker CB in FIG. 1, the disconnector DS ₁ is opened and only the disconnector DS ₂ is closed,
With the circuit separated from the cable, a test voltage is applied from the bushing BS side to the breaker CB. In the present invention, at least one of the first and second levers connecting the operation levers of the two disconnecting switches and the output lever of the operating device is arranged outside the container and can be separated from the output lever or the operation lever. Therefore, only one of the disconnectors can be closed in the above-described manner or when the disconnector is tested, and there is no problem during the test.

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

FIG. 2 schematically shows a main part of an embodiment of the present invention. In FIG. 2, reference numeral 1 is a box-shaped airtight container, and the inside of this container is insulated with SF ₆ gas or the like. The gas is filled at a pressure near atmospheric pressure. In the container 1, for example, equipments such as a shell breaker CB, first and second disconnecting switches DS ₁ and DS ₂ , connecting devices ESW _{1 to} ESW ₃ , and a lightning arrester LA are stored for three phases. They are connected to each other in accordance with the single wire connection diagram as shown in FIG. In the present invention, the configuration and arrangement of these devices are arbitrary, so in FIG.
First and second disconnecting switches DS ₁ and DS ₂ forming an essential part of the present invention
Only are indicated by abbreviations. Further, in FIG. 2, the illustration of the cable head and the bushing is omitted. In the present invention, a common disconnection is provided for the three-phase first and second disconnectors DS ₁ and DS ₂ that are connected to both sides of the disconnector CB and are connected to each other via the disconnector. A manipulator 2 is provided. The operating device 2 includes a drive source such as a pneumatic cylinder and an output of the drive source for the first and second output levers 3A.
And an output transmission mechanism for transmitting to 3B are housed in a case 4, and the case 4 of this operating device is attached to the outside of the side wall of the container 1 via a column 5. The first and second output levers 3A and 3B are arranged at a predetermined angle, and one end of each of these output levers extends from the case 4 to the container 1.
Is fixed to the output shaft 6 of the output transmission mechanism that protrudes toward the side wall of the. Three-phase first and second disconnectors DS ₁ and DS ₂
Are arranged side by side in the lateral direction of the container 1 (direction parallel to the axis of the output shaft 6), and these three-phase disconnectors DS ₁ and DS ₂ are respectively arranged in common with the common operating shaft 7 arranged parallel to the output shaft 6. And 8 are operated. Operating axes 7 and 8
Has one end pierced through the side wall of the container 1 rotatably and rotatably, and protrudes to the outside, and one ends of operation levers 9 and 10 are fixed to one ends of both operation shafts 7 and 8, respectively. One ends of first and second links 11 and 12 are connected to the other ends of these operation levers 9 and 10, respectively, by pins 13 and 14, and the other ends of the first and second links 11 and 12 are respectively connected. First and second via pins 15 and 16
Are connected to the other ends of the output levers 3A and 3B. Therefore, the operating levers 9 and 10 simultaneously rotate in the same direction as the output levers 3A and 3B rotate, and the disconnectors DS ₁ and DS ₂ are opened and closed by the rotation of these operating levers. In the illustrated state, the first and second disconnectors DS ₁ and DS ₂ are open, and by rotating the operating levers 9 and 10 clockwise from this state, both disconnectors are closed. Of the first and second links 11 and 12, it is the link 11 on the side of the disconnector DS ₁ that is opened during the test of the shisha or the disconnector.
At least one of the pins 13 and 15 at both ends of the link can be detached, so that the link 11 can be separated from at least one of the operation lever 9 and the output lever 3A. In the illustrated example, the pin 13 can be removed, and in the state in which the pin 13 is removed, the link 11 is separated from the operation lever 9 as shown by the chain line in the figure. Further, in this embodiment, a lock pin engagement hole 17 is provided on the side wall of the container 1, and a lock pin (not shown) is engaged in the lock pin engagement hole to prevent the operation lever 9 from rotating so that the disconnector DS ₁ is connected. It can be kept open. An operating device is also provided for the breaker and the grounding device, but a description thereof will be omitted.

With the above-mentioned configuration, one disconnecting device DS ₁ and DS ₂ can be operated by _one operating device 2, so that the number of operating devices can be reduced. When the disconnector DS ₁ is kept open and only the disconnector DS ₂ is closed during the test of the disconnector, the pin 13 is removed and the link 11 is moved to the operating lever 9
After disconnecting the lock pin and inserting the lock pin (not shown) into the lock pin insertion hole 17 to lock the operation lever 9 to the open position, the operation device 2 is operated to rotate the output lever 3 in the clockwise direction to disconnect the disconnector DS. Only ₂ can be closed.

In the above embodiment, the link 11 can be separated from at least one of the output lever 3A and the operation lever 9, but the other link 12 may be separated from at least one of the output lever 3B and the operation lever 10. Further, the operation lever 10 for operating the disconnector DS ₂ which is opened and closed during the test, the link 12 connected to the operation lever 10 and the output lever 3B connected to the link are inevitably provided outside the container 1. It is not necessary to arrange them, and they can be arranged inside the container 1.

In the above embodiment, the two output lever 3A, is provided with the 3B, by the positional relationship of the two disconnecting switches DS ₁ and DS ₂ of the operating lever connexion is two manipulator one output lever It can also be provided in common.

The present invention is not limited to the gas-insulated switchgear having the configuration shown in FIG. 1, but can be widely applied to the gas-insulated switchgear having the disconnectors on both sides of the breaker.

EFFECTS OF THE INVENTION As described above, according to the present invention, since two disconnecting switches are operated by one operating device, the number of operating devices can be reduced and the gas insulated switchgear can be downsized. Can be planned.
Further, at least one of the first and second links connecting the output lever of the operating device and the operating levers of the first and second disconnecting switches, respectively, is arranged outside the container of the gas insulated switchgear, and at least one of the first and second links is arranged. Since the link can be separated from at least one of the output lever of the operating device and the operating lever of the disconnecting switch, it is also possible to hold one of the two disconnecting switches in the open state and close the other disconnecting switch. It does not cause any problems when testing the vessels.

[Brief description of drawings]

FIG. 1 is a single wire connection diagram showing an example of the electrical configuration of the gas insulated switchgear, and FIG. 2 is a perspective view showing the essential parts of an embodiment of the present invention. 1 ... Container, 2 ... Disconnector operating device, 3A, 3B ... Output lever, 9, 10 ... Disconnector operating lever, 11 ...
1st link, 12 ... 2nd link, DS ₁ ... 1st disconnecting switch, DS ₂ ... 2nd disconnecting switch, CB ... Shiya disconnection.

Claims (1)

[Claims] 1. A sushi breaker, first and second disconnectors connected to each other through the sushi breaker, and the sushi breaker and the first and second disconnectors A gas-insulated switchgear comprising a container housed and filled with an insulating gas, wherein
And a second disconnecting switch common to the second disconnecting switch, and first and second links connecting the output levers of the operating device to the operating levers of the first and second disconnecting switches, respectively. And the at least one of the first and second links is disposed outside the container and is provided so as to be separable from at least one of the output lever and the operation lever. Switchgear.