KR20100070151A - Disconnecting switch - Google Patents

Abstract

PURPOSE: A disconnecting switch for a solid insulation switch is provided to maximize the insulating performance by placing high voltage shield on both ends of a fixing contactor. CONSTITUTION: A load connector(200) is formed on one end of the inside of a base(100) in order to be connected with a main bus line. A circuit opener(300) is formed on the central part of the inside of the base in order to release the connection between the main bus line and the ground. A ground connecting unit(400) is formed on the other end of the inside of the base in order to be connected with the ground. An insulation shaft(500) is arranged along a hollow part of the inside of the body. A movable contactor(600) is moved to the load connector, the circuit opener, or the ground connecting unit in order to form an injection state, an open state, or a ground injection state.

Description

Disconnector for solid insulated switchgear

The present invention relates to a transmission and distribution class switchgear, in particular a three-stage integrated position disconnection control unit is composed of a solid insulation method can be miniaturized and eco-friendly, yet easy to maintain and assemble a new type of solid insulation switchgear The present invention relates to a device disconnector.

In general, Gas Insulation Switchgear (GIS) uses insulation gas (SF6) with excellent insulation performance and arc extinguishing function in a metal sealed container (tank) as an insulating medium to store conductors and various protective devices for reliability. It is an improved water substation facility, and is composed of various components such as a circuit breaker, a disconnecting switch, and an earth switch.

Here, the disconnecting device is a device for isolating the separated circuit from the power supply after removing the load current in case of installation in front of the power line, high voltage, special high voltage bus, or equipment. It is a device that opens and closes the circuit to change the connection of the main circuit in i).

The disconnector is filled with hexafluoride gas (SF6 gas) that maintains insulation in the insulated tank, and operates by moving three positions such as an open state, a ground bus input state, and a main bus input state. The three-stage position is operated by driving a manipulator having a motor and a cam structure operated by the motor.

However, the above-mentioned conventional gas insulated switchgear is used SF6 gas as an insulating medium in consideration of the minimum distance and insulation medium to maintain the insulation between the main bus and the ground tank to reduce the overall size. Therefore, there was a problem that it was extremely difficult to achieve the miniaturization of the size.

Of course, in the past, miniaturization has been carried out by using a solid insulator insulation or raising a steady state of the insulating gas for some parts, but this effect is extremely limited, but the maintenance management to maintain performance As the number of items increased, there was an uncomfortable problem in terms of use and management of disconnectors.

In addition, since the gas used as the insulation medium in the disconnector is SF6 gas designated as an environmentally harmful gas that affects global warming, research for the replacement thereof is also urgent.

The present invention has been made to solve the various problems according to the prior art described above, the object of the present invention is to configure the disconnector capable of three-stage integrated position position control in a solid insulation method that can be miniaturized and eco-friendly To provide a new type of solid-state insulation switchgear that is easy to repair and assemble.

According to the disconnector for a solid insulated switchgear of the present invention for achieving the above object, the base is formed of a hollow frame structure through which the inside is made of a solid insulator and filled with dry air therein; A load connection part configured at one end of the base and forming a part for electrical connection with the main bus bar; A circuit opening part configured at a center side in the base and forming a part for disconnecting the main bus and the ground; A ground connection part configured at the other end of the base and forming a part for connection with the ground; An insulating shaft installed along a hollow portion in the base and partially exposed to the outside through a ground connection side; And, by the rotation of the insulated shaft is moved to the load connection portion and the circuit opening or the ground connection portion, the input state connected to the main bus, the open state disconnected from the main bus and ground, the ground input state connected to the ground selectively Movable contactor which is operated to achieve: characterized in that it comprises a.

Here, the load connecting portion includes a fixed contactor formed with insertion grooves respectively formed at the outer wall surfaces at both ends, and in the insertion grooves formed at the outer wall surface at any one end of the outer wall surfaces at both ends of the fixed contactors exposed to the outside of the base. The fixed contact is provided to be electrically connected to the main bus bar and the insertion groove formed on the outer wall surface of the other end located inside the base is characterized in that the movable contact is formed so as to be connected to the insert, the fixed contact Both ends are characterized in that the high-pressure shield is further included.

In addition, the circuit opening portion includes a through-fixed contact formed in a hollow state so that the insulating shaft and the movable contact can be moved through, and to be electrically connected to any branch of the peripheral surface of the through fixed contact. Characterized in that the insertion groove provided with a fixed contact is formed, the both ends of the fixed contact is characterized in that the high pressure shield is further included.

In addition, the ground connection is characterized in that it is formed in a hollow state so that the insulating shaft and the movable contact is moved through, and comprises a ground fixed contact connected to the ground.

The insulating shaft may include a screw shaft having a spiral formed on an outer circumferential surface thereof, and the movable contact may be formed with a through hole through which the insulating shaft penetrates along an axial direction, and may be engaged with the spiral of the insulating shaft along an inner circumferential surface of the through hole. Spirals are formed, and key grooves corresponding to each other are formed on the circumferential surface of the movable contact and the inner circumferential surface of the circuit opening portion, and the key grooves are coupled with a key to linearly move the movable contact according to the rotation of the insulating shaft. It is characterized in that possible configuration.

In addition, an insulating material may be provided on a circumferential surface between the load connecting portion and the circuit opening portion and between the circuit opening portion and the ground connection portion among the inner circumferential surfaces of the base.

As described above, the disconnector for a solid insulated switchgear according to the present invention enables three-stage integrated position operation with excellent insulation performance without using SF6 gas as an insulation medium, which is eco-friendly and can be miniaturized. Has an effect.

In addition, since the disconnection device for a solid insulation switch according to the present invention can be prevented at the same time with the power supply side, the load side, and the ground side at the same time, it is possible to obtain excellent maintenance and accident rate due to inadvertent operator in the installation. It has the effect that it can be prevented.

In addition, the disconnecting device for a solid insulation switchgear according to the present invention has an effect that the manufacturing is simple because it is formed integrally without an assembly portion.

Hereinafter, a preferred embodiment of the disconnector for a solid insulated switchgear of the present invention will be described with reference to FIGS. 1 to 4.

1 and 2, the disconnector for the solid insulated switchgear according to the exemplary embodiment of the present invention is largely divided into the base 100, the load connection part 200, the circuit opening part 300, and the ground connection part 400. And an insulating shaft 500 and a movable contact 600.

This will be described in more detail for each component as follows.

First, the base 100 is a series of components constituting the enclosure of the disconnecting device, is formed in a hollow frame structure penetrated therein.

In particular, the base 100 is made of a solid insulator and filled with dry-air in the internal space. This structure is to prevent the use of such insulating gas because the structure using the insulating gas (SF6 gas) as an existing insulating medium causes an environmental problem. In other words, by forming the enclosure of the disconnecting device as a solid insulator and filling the interior with dry air to achieve an environmentally friendly configuration, while simplifying the configuration and downsizing.

At this time, one end of the base 100 is formed with a main bus bar connector 110 for connection with the main bus bar, the other end of the base 100 is installed through the ground connection conductor 120 for connection with the ground The central side circumferential surface of the base 100 is formed with a branch bus bar connector 130 for connection with the branch bus bar, and one of the circumferential surfaces of the base 100 to the interior space of the base 100 to dry air Dry air inlet 140 for injecting is formed.

In the embodiment of the present invention, the base 100 combines all of the load connection part 200, the circuit opening part 300, the ground connection part 400, the insulating shaft 500, and the movable contactor 600 to each other in a mold. It is formed by injection molding. Because of this, the base 100 has the advantage that the manufacturing is simple because it is formed integrally without an assembly portion.

Next, the load connection part 200 is a part for electrical connection with the main bus bar, and is configured at one end (left side in the drawing) in the base 100.

The embodiment of the present invention suggests that the load connecting portion 200 includes a fixed contact 210 formed by inserting grooves 211 and 212 respectively formed at the outer wall surfaces at both ends thereof.

Of course, the fixed contact 210 may be formed in a pipe structure of the interior penetrated. However, such a pipe structure is most preferably formed in a configuration according to an embodiment in which the inner center side is closed because excessive movement of the movable contact 600 may occur.

At this time, the insertion groove formed on the outer wall surface of any one end communicating with the main busbar connector 110 of each of the insertion grooves (211,212) formed on the outer wall surface of both ends of the fixed contact 210 (hereinafter, "first insertion groove" A fixed contact 220 is provided in the 211 so as to be electrically connected to the main bus bar, and an insertion groove (hereinafter referred to as a “second insertion groove”) formed in the outer wall surface of the other end of the fixed contact 210. 212, the movable contact 600 is arranged to be inserted into the connection.

Next, the circuit opening part 300 is a part for connection or disconnection with the main bus and the ground, and is configured in the center side part of the base 100.

The embodiment of the present invention suggests that the circuit opening part 300 includes a through fixed contact part 310 formed in a hollow state so that the insulating shaft 500 and the movable contact part 600 can be moved through. .

In this case, an insertion groove 311 communicating with the branch bus connector 130 is formed at any one of the circumferential surfaces of the penetrating fixed contact 310, and is electrically connected to the branch bus in the insertion groove 311. The fixed contact 320 is provided to be.

Next, the ground connection part 400 is a portion for connection with the ground, and is provided at the other end in the base 100.

In the embodiment of the present invention, the ground connection part 400 is formed in a hollow state so that the insulating shaft 500 and the movable contactor 600 can be moved through, and is composed of a ground fixed contactor 410 connected to the ground. It is characterized by.

Next, the insulating shaft 500 is a series of configurations for moving the movable contact 600, is installed along the hollow portion in the base 100.

One end of the insulating shaft 500 is exposed to the outside through the ground connection 400 side to receive the driving force of the drive motor in direct or indirect connection with the drive motor (not shown) of the manipulator for the disconnector. It is configured to enable forward and reverse rotation.

In this case, the other end of the base 100 where the end of the insulating shaft 500 is exposed is formed to be in a closed state except for a portion through which the insulating shaft 500 penetrates, so that the internal environment of the base 100 Communication with the environment outside the base 100 is prevented.

In particular, the insulating shaft 500 is composed of a screw shaft formed with a spiral along the circumferential surface.

Next, the movable contact 600 is moved to the load connection part 200 and the circuit opening part 300 or the ground connection part 400 by the rotation of the insulating shaft 500, the input state connected to the main bus, It is a series of components that are operated to selectively open state disconnected from the main bus and the ground, and ground input connected to the ground.

In this case, the movable contact 600 is formed with a through hole 610 through which the insulating shaft 500 penetrates along the axial direction, and a spiral is formed on an inner circumferential surface of the through hole 610.

In addition, a key groove 620 is formed on the circumferential surface of the movable contact 600, and a key groove corresponding to the key groove 620 is also formed on the inner circumferential surface of the penetrating fixed contact 310 constituting the circuit opening 300. 312 is formed, and the two key grooves 312 and 620 are coupled to each other as a key 630.

Therefore, the movable contact 600 is movable along the axial direction of the insulating shaft 500 when the forward and reverse rotation of the insulating shaft 500 is made.

Particularly, the movable contact 600 has the other end (right side in the drawing) when one end (left side in the drawing) is inserted into the second insertion groove 212 of the fixed contactor 210 forming the load connection part 200. The end is long enough to be in contact with the end of the penetrating fixed contact 310 constituting the circuit opening part 300 (left side in the drawing) and the other end of the penetrating fixed contact 310. When contacted in a state positioned in the end (right side in the drawing), the other end is formed to have a length enough to be inserted into the ground fixed contact 410 constituting the ground connection 400.

On the other hand, in the embodiment of the present invention between the fixed contact 210 forming the load connecting portion 200 and the through-hole positive contact 310 forming the circuit opening portion 300 of the inner peripheral surface of the base 100 and It is suggested that the insulating material 700 is further provided on the circumferential surface between the through-fixed contact 310 and the ground fixed contact 410 constituting the ground connection 400.

At this time, the insulating material 700 serves to enable injection molding for the base 100, and is made of fiber-reinforced plastics (FRP).

In addition, the embodiment of the present invention proposes that the high pressure shield 800 is further included at both ends of the fixed contact 210 and both ends of the through contact 310.

In this case, the high-voltage shield 800 serves to reduce the distance between the poles by attenuating the voltage applied between the positive electrode (fixed contact and through fixed contact) to improve the insulation performance.

In particular, the high-pressure shield 800 is provided on both ends of each contact (210, 310), and the outer end is formed to be bent in a direction facing the opposite pole to maximize the insulation performance.

Therefore, the insulating material 700 and the high-pressure shield 800 can be configured to shorten the insulation distance through the improvement of the insulation performance in the base 100, thereby reducing the size of the actual disconnector. To have.

Hereinafter, to explain the manufacturing process of the disconnecting device for a solid insulation switchgear according to an embodiment of the present invention configured as described above.

First, the fixed contactor 210, the through-fixed contactor 310, and the ground-fixed contactor 410 are prepared, respectively, between the fixed contactor 210 and the through-fixed contactor 310, and the through-fixed contactor 310 and the ground-fixed contactor. Pipe contact insulating material 700 is provided between the contacts 410, respectively.

Then, the fixed contact 210 and the through-contact fixed contact 310 configured as described above and the ground fixed contact 410 and the insulating shaft (500) coupled to the movable contact 600 into the insulating material 700 is inserted and coupled. .

In addition, the high pressure shield 800 is mounted at both ends of the fixed contact 210 and both ends of the through fixed contact 310.

Subsequently, the base 100 is formed by providing each component assembled as described above to a mold and then injecting the same into a solid insulator.

Then, when the formation of the base 100 through the above operation is completed, the insulating shaft 500 is closed, and then the dry air inlet 140 is filled with dry air to complete the disconnector for the solid insulation switchgear. do.

Next, with reference to the accompanying Figures 2 to 4 will be described in more detail with respect to the operating state of the disconnecting device for a solid insulated switchgear configured as described above.

First, FIG. 2 is a drawing illustrating an input state in which electrical connection with the main bus is made.

In this input state, one end of the movable contact 600 is inserted into and contacted with the second insertion groove 212 of the fixed contact 210 forming the load connection part 200, and the other end opens the circuit opening 300. Contact is made in a state located in one end of the through-fixed contact 310 to be made, thereby the disconnector is in operation.

If the circuit is to be opened due to an abnormal occurrence or other cause of the system in the closing state, the driving shaft constituting the manipulator for the disconnecting device is operated to rotate the insulating shaft 500 in the forward direction.

In this case, one end of the movable contact 600 inserted into and connected to the second insertion groove 212 of the fixed contact 210 is linearly moved by the forward rotation of the insulating shaft 500, and the second insertion is performed. The other end of the movable contact 600 which is separated from the groove 212 and inserted into one end of the penetrating fixed contact 310 passes through the penetrating fixed contact 310 and the other side of the penetrating fixed contact 310. Move towards the end.

As such, one end of the movable contact 600 is positioned in one end of the through fixed contact 310 by the continuous rotation of the insulating shaft 500, and the other end of the movable contact 600 is fixed through the fixed contact 310. When located in the other end of the contact 310, the disconnector is substantially in an open state. This is as shown in Figure 3 attached.

If the maintenance or inspection of the disconnector is to be performed in the open state, it is possible through additional forward rotation of the insulation shaft 500.

That is, if additional forward rotation of the insulating shaft 500 is made in the open state, the movable contact 600 is gradually moved to the ground connection part 400 by the rotation of the insulating shaft 500, and the movable by the movement. When the other end of the contact 600 is inserted into contact with the ground fixed contact 410 and one end of the movable contact 600 is formed at the other end of the through fixed contact 310, the injection into the ground is performed. The ground input is completed. This is as shown in Figure 4 attached.

On the other hand, when the system abnormality is solved in the open state to operate the disconnector, the driving motor of the disconnecting device manipulator is driven to reverse the rotation of the insulating shaft 500. As a result, both ends of the movable contact 600 are in the input state connected to the fixed contact 210 and the through contact 310, respectively. This is the same as in FIG. 2.

As described above, the disconnecting device for the solid insulation switchgear according to the present invention enables three-stage integrated position operation with excellent insulation performance without using SF6 gas as an insulation medium, which is environmentally friendly and can be miniaturized.

Figure 1 is a perspective view of the main portion cut to show the external structure of the disconnector for a solid insulation switchgear according to a preferred embodiment of the present invention

Figure 2 is a cross-sectional view illustrating the input state of the internal structure of the disconnector for a solid insulated switchgear according to a preferred embodiment of the present invention

3 is a cross-sectional view illustrating an open state of an internal structure of a disconnector for a solid insulated switchgear according to a preferred embodiment of the present invention.

4 is a cross-sectional view illustrating a ground input state of an internal structure of a disconnector for a solid insulated switchgear according to a preferred embodiment of the present invention.

Explanation of symbols for main parts of the drawings

100. Base 110. Main busbar connector

120. Grounding conductor 130. Branch bus connector

200. Load connection 210. Fixed contactor

211,212. Insertion groove 220,320. Fixed contact

300. Open circuit 310. Fixed through contact

311.Insert grooves 312,620. Keyway

400. Ground connection 410. Ground fixed contactor

500. Insulation shaft 600. Movable contactor

610.Through Hole 630. Tall

700. Insulation 800. High pressure shield

Claims (8)

A base made of a solid insulator and having a hollow frame structure penetrated therein, and having a base filled with dry air; A load connection part configured at one end of the base and forming a part for electrical connection with the main bus bar; A circuit opening part configured at a center side in the base and forming a part for disconnecting the main bus and the ground; A ground connection part configured at the other end of the base and forming a part for connection with the ground; An insulating shaft installed along a hollow portion in the base and partially exposed to the outside through a ground connection side; And, Rotation of the insulated shaft moves to the load connection part and the circuit opening part, or the ground connection part, and operates to selectively make the input state connected to the main bus, the open state disconnected from the main bus and the ground, and the ground input state connected to the ground. Movable contactor: a disconnector for a solid insulated switchgear, characterized in that it comprises a. The method of claim 1, The load connecting portion is configured to include a fixed contactor each formed with an insertion groove on the outer wall surface at both ends, In the insertion groove formed in the outer wall surface of either end exposed to the outside of the base of the outer wall surface of the both ends of the fixed contact is provided with a fixed contact to be electrically connected to the main bus bar and the outer wall of the other end located inside the base Insertion groove formed in the surface is a disconnector for a solid insulation switchgear, characterized in that the movable contact is formed so as to be connected. The method of claim 2, Disconnectors for solid-state insulation switchgear, characterized in that each of the ends of the fixed contact is further comprised of a high-pressure shield. The method of claim 1, The circuit opening part is configured to include a through fixed contact formed in a hollow state so that the insulating shaft and the movable contact can be moved through, The disconnecting device for the solid insulation switchgear according to claim 1, wherein an insertion groove having a fixed contact point is formed at any one portion of the circumferential surface of the through fixed contact. The method of claim 4, wherein Disconnectors for solid-state insulation switchgear, characterized in that each of the ends of the fixed contact is further comprised of a high-pressure shield. The method of claim 1, And the ground connection part is formed in a hollow state so that the insulating shaft and the movable contact can be moved through, and includes a ground fixed contactor connected to the ground. 7. The method according to any one of claims 1 to 6, The insulating shaft is composed of a screw shaft formed with a spiral on the outer peripheral surface, The movable contact is formed with a through hole through which the insulating shaft penetrates along an axial direction, and a spiral is formed along the inner circumferential surface of the through hole and meshed with the spiral of the insulating shaft. Key grooves corresponding to each other are formed on the circumferential surface of the movable contact and the inner circumferential surface of the circuit opening portion, and the key grooves are coupled by a key to enable linear movement of the movable contact according to the rotation of the insulating shaft. Disconnectors for solid insulated switchgear. 7. The method according to any one of claims 1 to 6, And an insulating material is provided on a circumferential surface between the load connecting portion and the circuit opening portion and between the circuit opening portion and the ground connecting portion among the inner circumferential surfaces of the base.

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