JPH1051913A - Gas insulated combined switchgear - Google Patents

Abstract

(57) [Problem] To simplify a gas monitoring system by eliminating a spacer provided between a conventional circuit breaker container and a disconnector container to make the insulating gas compartment a single gas compartment. Improvement of insulation deterioration due to adhesion of metallic foreign matter to the spacer. SOLUTION: A circuit breaker which is housed in a substantially horizontal state in a tubular circuit breaker container filled with insulating gas and has a cut-off portion which is opened / closed by an operating device, and a tubular disconnector container filled with insulating gas. A disconnector having a disconnection part stored therein and connected to the disconnector container at the circuit breaker container upper part,
In the gas-insulated composite switchgear comprising, the circuit breaker container and the disconnector container are formed in a continuous single space,
The insulating gas is used as a single gas compartment, and an insulator for supporting the conductor of the disconnecting portion is provided between the bottom surface of the disconnector container remote from the sliding portion of the disconnector and the conductor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated composite switchgear.

[0002]

2. Description of the Related Art A conventional gas-insulated composite switchgear will be described with reference to FIG.

[0003] This device is configured as follows.

As the circuit breaker 1, a circuit breaker 4 is disposed substantially horizontally in a cylindrical circuit breaker container 3 filled with an insulating gas, and the circuit breaker 4 is held by an insulating support cylinder 7. It is fixed to 3. An insulating operation rod 6 is connected to the blocking unit 4, and is opened and closed by an operation device (not shown) via a link 8. Current transformers 9, 9 are provided on the upper part of the circuit breaker container 3. One of the current transformers 9, 9 is connected to the bushing 10, and the other is connected to the disconnector 2.

The disconnecting device 2 has a disconnecting portion 12 housed in a disconnecting portion container 11 filled with an insulating gas, a grounding switch 13 is connected to a lower portion of the disconnecting portion 12, and a bushing 10 is connected to an upper portion thereof. Have been. Circuit breaker container 3 and disconnector container 1
A spacer 15 made of an insulator for partitioning the two insulating gases is provided between the two, and the gas partition for the two insulating gases is divided.

[0006]

In the above prior art, since the spacer 15 made of an insulating material is installed near the sliding mechanism of the disconnecting portion 12, metal foreign matter generated by the sliding operation is applied to the spacer 15. When adhered, remarkable insulation deterioration was caused, leading to dielectric breakdown.

Further, since the gas compartment is divided by the spacer 15, there is a problem that the gas monitoring system is divided and a gas monitoring unit is required for the divided gas monitoring system.

[0008]

The present invention employs the following means in order to solve the above-mentioned problems.

A circuit breaker which is housed in a substantially horizontal state in a tubular circuit breaker container filled with an insulating gas and has a cut-off portion which is opened and closed by an operating device, and a tubular disconnector container filled with an insulating gas. And a disconnector connected to the disconnector container at the top of the circuit breaker container, wherein the circuit breaker container and the disconnector container are continuously connected to each other. The insulating gas is formed in a single gas compartment.

[0010] Alternatively, in the gas-insulated combined switchgear, a current transformer is provided above the circuit breaker container, a bushing is connected via one current transformer, and the disconnector is connected via the other current transformer. The container is connected.

In the gas-insulated composite switchgear, an insulator for supporting the conductor of the disconnecting portion is provided between the bottom surface of the disconnector container remote from the sliding portion of the disconnector and the conductor. It is characterized by.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG.

The gas-insulated composite switchgear according to the present invention is configured as follows.

The circuit breaker 1 has a circuit breaker 4 disposed substantially horizontally and housed in a cylindrical circuit breaker container 3 filled with an insulating gas made of SF ₆ gas. 7 is fixed to the circuit breaker container 3. The insulating operation rod 6 is connected to the buffer cylinder 5 in the shut-off unit 4. The insulating operating rod 6 is opened / closed by an operating device (not shown) through the link 8 to open and close the electrodes of the shut-off unit 4. I do. In the upper part of the circuit breaker container 3, current transformers 9, 9
And one of the current transformers 9 and 9 has a bushing 1
0 and the other is connected to disconnector 2.

The disconnector 2 has a disconnecting portion 12 housed in a cylindrical disconnector container 11 filled with an insulating gas, and the circuit breaker container 3 and the disconnector container 11 form a single continuous space. It is configured to be. As a result, the disconnector container 1
The insulating gas stored in 1 is the same as the insulating gas stored in the circuit breaker container 3. Also, the disconnecting portion 12
The grounding switch 13 is connected to the upper part of the, and the bushing 10 is connected to the lower part.

Further, an insulator 14 for supporting the conductor of the disconnecting portion 12 is provided between the bottom surface of the cylindrical disconnecting portion container 11 remote from the sliding portion of the disconnector 12 and the conductor. .

As described above, in the gas-insulated composite switchgear of the present invention, a conventional spacer made of an insulator is not provided between the circuit breaker container 3 and the disconnector container 11.
Both insulating gas compartments are configured as a single gas compartment.

Further, according to the present invention, the conventional spacer for supporting the conductor of the disconnecting portion 12 is eliminated, and the insulator 14 for supporting the conductor of the disconnecting portion 12 is provided with a sliding member. The metal foreign matter generated by the sliding operation of the disconnecting switch 2 is
4 is reduced, and the danger of causing significant insulation deterioration and leading to insulation breakdown is reduced.

[0019]

As described above, the composite gas-insulated switchgear according to the present invention is a spacer made of an insulator which is provided between the circuit breaker container 3 and the disconnector container 11 in the conventional gas-insulated composite switchgear. Is eliminated, a single gas compartment is provided between the circuit breaker container 3 and the disconnector container 11, and the burden on the gas monitoring system is reduced.

Further, since the spacer is eliminated,
Since a more compact structure can be achieved, and no insulator such as a spacer is provided near a sliding mechanism such as the disconnector 2, metal foreign matter generated by the sliding operation adheres to the spacer, It does not cause dielectric breakdown, which leads to improvement in device reliability.

Furthermore, the gas-insulated composite switchgear of the present invention can be manufactured at low cost by removing the bushing of the standard model circuit breaker 1 and connecting the standard disconnector and ground switchgear unit.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a gas-insulated composite switchgear according to the present invention.

FIG. 2 is a cross-sectional view showing a conventional gas-insulated composite switchgear.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Breaker 2 Disconnector 3 Breaker container 4 Breaker 5 Buffer cylinder 6 Insulating operation rod 7 Insulating support cylinder 8 Link 9 Current transformer 10 Bushing 11 Disconnector container 12 Disconnecting part 13 Ground switch 14 Insulator 15 Spacer

Claims (2)

[Claims] 1. A circuit breaker which is housed in a substantially horizontal state in a tubular circuit breaker container filled with an insulating gas and has a cut-off portion which is opened and closed by an operating device, and a tubular disconnector filled with an insulating gas A disconnector having a disconnection portion accommodated in a container, and a disconnector connected to the disconnector container at an upper portion of the circuit breaker container, a gas-insulated composite switchgear comprising: the circuit breaker container and the disconnector container Are formed in a single continuous space, and the insulating gas is made into a single gas compartment. 2. The disconnector according to claim 1, wherein an insulator for supporting the conductor of the disconnecting portion is provided between the conductor and the bottom surface of the disconnector container remote from the sliding portion of the disconnector. Gas-insulated composite switchgear.