KR20060002598A - Gas insulated switchgear - Google Patents

Abstract

The present invention relates to a gas insulated switchgear, by integrating the cable head unit and the PT disconnector unit, which is a constituent unit of the gas insulated switchgear, can be integrated into a unit, it is possible to reduce the installation area when installing the device, and shorten the assembly time The present invention relates to a gas insulated switchgear that can reduce costs and facilitate maintenance and inspection of a device.

To this end, in the present invention, the cable head unit and the PT disconnector unit are installed in one tank, and a conductor connected to the main circuit through a spacer is horizontally installed inside the one tank, and the conductor and PT disconnector is installed so as to be able to be contacted / shorted, PT unit connected to the PT disconnector on the upper part of the tank, the cable head is integrally installed so as to be connected to the conductor and the two units are combined. It provides a gas insulated switchgear characterized in that the installation is configured.

Gas Insulated Switchgear, Unit, Transformer, Disconnector, Cable Head, Integrated

Description

Gas Insulated Switchgear {GAS INSULATED SWITCHGEAR}

1 is a view showing the configuration of a conventional gas insulated switchgear

2 to 3 is a view showing the main configuration and operation of the conventional gas insulated switchgear

4 is a diagram illustrating a configuration of a gas insulated switchgear according to the present invention.

5 to 6 is a view showing the main configuration and operation of the gas insulated switchgear

<Description of the symbols for the main parts of the drawings>

20 tank 21 PT disconnector

22: cable head 23: conductor

24: PT unit 25: rotating shaft

26: connection rod 27: mover

28: spacer

The present invention relates to a gas insulated switchgear, and more particularly, by integrating the cable head unit and PT disconnector unit, which are the constituent units of the gas insulated switchgear, in one piece, the installation area can be reduced when the device is installed. The present invention relates to a gas insulated switchgear that can shorten assembly time, reduce costs, and facilitate maintenance and inspection of equipment.

Gas insulated switchgear or gas insulated breaker is installed on the electric line and it cuts off the electric power system and power equipment by safely cutting off the current in case of artificially opening or closing the line in normal use or when an accident current such as ground fault or short circuit of the line occurs. As an electric device for protecting, such a gas insulated switchgear is a nozzle for blowing SOHO gas (for example, sulfur fluoride (SF ₆ ) gas) having excellent insulation force compressed in the compression chamber when the switch is tripped. By spraying through to extinguish the arc generated during trip operation.

1 is a view showing the configuration of a conventional gas insulated switchgear.

In addition, Figures 2 to 3 is a view showing the main configuration and operating state of the conventional gas insulated switchgear.

As shown in FIG. 1, the conventional gas insulated switchgear includes a cable head (underground line for incoming or outgoing) unit 10, which is a constituent unit of the gas insulated switchgear, and a PT (Potential Transfermer) unit 11. And the breaker unit 12 and the like as a separate unit incorporating various components in each tank, and assembled by bolting the units in an electrically connected state by the conductors 18.

In addition, the PT unit 11 serves to separate the transformer (not shown) of the PT unit 11 from the main circuit (conductor) 18 when an abnormal voltage or an accident current is generated or when the device is being repaired or checked. The PT disconnector unit 13 provided with the PT disconnector 14 is assembled.

At this time, the PT disconnector 14 is connected to the rotary shaft 15 and one end of the rotary shaft 15 integrally as shown in Figures 2 to 3, the rotational movement in accordance with the rotation of the rotary shaft 15 It comprises a rod 16 and a movable member 17 connected to the other end of the connecting rod 16 and selectively contacted / shorted to the conductor 18 according to the rotational movement of the connecting rod 16.

Therefore, when abnormal voltage or fault current is generated or when the device is being repaired or checked, the PT disconnector 14 is operated to separate the power supply of the transformer from the main circuit (conductor) 18 and then maintain the transformer. Will be repaired.

However, in the conventional gas insulated switchgear having the above structure, the PT unit 11 and the cable head unit 10 including the PT disconnector unit 13 are configured as separate units, which is a gas insulated switchgear. It is a limiting factor in the reduction of the installation area, which is a great advantage of the device, and the inconvenience of having to inspect each unit during maintenance and inspection.

In addition, the structure as described above takes a lot of assembly time in the field and reduces the design freedom, there is a disadvantage in terms of cost.

Accordingly, the present invention has been made to solve the above problems, by integrating the cable head unit and PT disconnector unit of the gas insulated switchgear unit unit integrally, it is possible to reduce the installation area when installing the device. In addition, the object of the present invention is to provide a gas insulated switchgear that can shorten the assembly time, reduce the cost, and facilitate the maintenance and inspection of the device.

In order to achieve the above object, the present invention provides a cable head unit and a PT disconnect unit in one tank, wherein one of the tanks has a conductor connected horizontally to the main circuit through a spacer, and the upper portion of the conductor PT disconnectors are installed at the conductors so that the conductors can be contacted / short-circuited. A cable head is integrally installed at the lower portion of the conductors, and the PT disconnectors are located at the top of one tank where the two units are combined. The PT unit to be connected is installed and configured.

In addition, the PT disconnector, the rotating shaft; A connection rod integrally connected to the rotation shaft to rotate in accordance with the rotation of the rotation shaft; It is characterized in that it comprises a mover connected to the connection rod and connected to the conductor in accordance with the rotational movement of the connection rod.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

4 is a view showing the configuration of a gas insulated switchgear according to the present invention.

In addition, Figures 5 to 6 is a view showing the main configuration and operating state of the gas insulated switchgear according to the present invention.

However, in describing the present invention, a detailed description of known functions or configurations will be omitted to clarify the gist of the present invention.

As shown, the gas insulated switchgear according to the present invention integrates the cable head (underground line of the incoming or outgoing underground line) unit, which is a constituent unit of the gas insulated switchgear unit, and the disconnecting unit for PT (Potential Transfermer) as an integrated unit. It is made up.

That is, the cable head unit and the PT disconnector unit are integrally installed in one tank 20, and the conductor 23 connected to the main circuit through the spacer 28 is installed inside the one tank 20. ) Is installed horizontally, PT disconnector 21 is provided above the conductor 23 so that the conductor 23 can be contacted / shorted, and a cable head 22 is provided below the conductor 23. It is integrally provided so as to be connected to the conductor 23.

In addition, a PT unit 24 connected to the PT disconnector 21 is installed on an upper portion of the tank 20 in which the two units are combined, and the PT unit 24 is bolted in an electrically connected state. Assembled by bonding.

At this time, the PT disconnector 21 serves to separate the transformer (not shown) of the PT unit 24 from the main circuit when an abnormal voltage or an accident current occurs, or when the device is being repaired and checked. A description with reference to 5 to 6 as follows.

The PT disconnector 21 is connected to the rotary shaft 25, one end of the rotary shaft 25 is integrally connected to the rod 26 to rotate in accordance with the rotation of the rotary shaft 25, and the connecting rod 26 It is configured to include a mover 27 is connected to the other end of the contactor 27 is selectively contacted / shorted in accordance with the rotational movement of the connecting rod (26).

Therefore, when the abnormal voltage or accident current is generated or when the device is repaired and checked, the PT circuit breaker 21 is operated so that the power supply to the PT unit 24 can be cut off as shown in FIG. 6. After the separation from the conductor (23) to maintain the transformer of the PT unit 24.

In the normal state, power is supplied from the main circuit 23 to the PT unit 24 through the PT disconnector 21 so that current flows.

As described above, according to the gas insulated switchgear according to the present invention, by integrating the cable head unit and PT disconnector unit which are the constituent units of the gas insulated switchgear, the installation area can be reduced. It can reduce the assembly time, reduce the cost, and facilitate the maintenance and inspection of the device.

Claims (2)

Install the cable head unit and PT disconnector unit in one tank, and inside the one tank, a conductor connected to the main circuit through a spacer is installed horizontally, and the upper part of the conductor is capable of contacting / shorting the conductor. A disconnecting unit is installed, and a lower portion of the conductor is integrally installed so that the cable head is connected to the conductor, and a PT unit connected to the disconnecting unit for PT is installed on one tank unit where the two units are combined. Gas insulated switchgear. The method of claim 1, wherein the PT disconnector, A rotating shaft; A connection rod integrally connected to the rotation shaft to rotate in accordance with the rotation of the rotation shaft; The gas insulated switchgear is configured to include a mover connected to the connection rod and connected to the conductor in accordance with the rotational movement of the connection rod.

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