KR102473176B1 - Earthquake-proof solid insulated switchgear - Google Patents

Abstract

Disclosed in the present invention is an earthquake-proof solid insulated switchgear, comprising: first to fifth supporting frames fixed to an enclosure frame; a first insulation housing mounted in an upright state between the first supporting frame and the second supporting frame and configured to support and protect a circuit breaker for opening and closing a load current and blocking a fault current; a second insulation housing mounted between the third supporting frame and the first insulation housing and configured to individually support and protect a ground switch for grounding a circuit and removing a residual current and first and second disconnectors for changing the connection of the circuit or disconnecting the circuit in a no-load state; a third insulation housing vertically mounted in an upright state on an upper side of the second insulation housing and configured to support and protect a first branch socket connected to an upper portion of the first disconnector by embedding the first branch socket therein; an upper mount mounted between the fourth supporting frame and the third insulation housing and configured to support the third insulation housing and fix the same to the fourth supporting frame; a fourth insulation housing vertically mounted in an upright state on a lower side of the second insulation housing and configured to support and protect a second branch socket connected to a lower portion of the second disconnector by embedding the second branch socket therein; and a lower mount mounted between the fifth supporting frame and the fourth insulation housing and configured to support the fourth insulation housing and fix the same to the fifth supporting frame.

Description

Earthquake-proof solid insulated switchgear}

The present invention relates to a solid insulated switchgear, and more particularly, to an earthquake-resistant solid insulated switchgear that can be safely protected from vibration caused by an earthquake or external shock without damage or accident.

Gas Insulated Switchgear (GIS), which is most widely applied for the purpose of control, monitoring, and protection of power transmission in power plants and substations, which are the main foundation of the domestic power system, mainly uses SF ₆ gas as an insulation and arc-extinguishing medium for high voltage. is using

However, SF ₆ gas is a greenhouse gas that causes environmental pollution and global warming. In recent years, SF ₆ gas has been used as an insulating medium in consideration of domestic and international environmental policies that require mandatory reduction of its emissions in accordance with the Kyoto Protocol of the International Climate Change Convention. A solid insulated switchgear with safety and eco-friendliness has been developed by solid insulating the body part and the busbar part with an epoxy resin mold with excellent insulation performance without using it, and the market size is continuously expanding.

Unlike MCSG (Metal Clad Switchgear), this Solid Insulated Switchgear integrates a Cricuit Breaker (CB), Disconnecting Switch (DS), and Earthing Switch (ES), etc. There are no parts, so there is no electric shock accident due to contact, and there is no need for periodic maintenance and inspection according to the use of SF ₆ gas of the existing GIS, and it is possible to protect power receiving and distribution by quickly isolating faults and minimizing outage time.

Referring to FIG. 1, in a general solid insulated switchgear, devices such as a circuit breaker, disconnector, grounding switch, current transformer (CT), lightning arrester (LA), bus bar, and conductor are installed and power is input to INCOMING Board, MOF board where Metering Out Fit (MOF) is installed, PT board where devices such as Potential Transformer, disconnector, and earthing switch are installed, circuit breaker, disconnector, earthing switch, current device, It consists of a FEEDER board where devices such as arresters are installed and power is distributed.

On the other hand, Patent Document 1 discloses a solid insulated switchgear having a structure in which component parts such as a circuit breaker, disconnector, earthing switch, bus bar, and conductor are compactly built in a package type in a metal enclosure.

However, this is because each component device and parts with different weights are not uniformly distributed and arranged, and the weight distribution is eccentric to one side, that is, the center of gravity is high, and stress concentration is induced when vibration or external shock due to an earthquake is applied. There is a problem that the seismic performance is poor, such as breakage and overturning.

In order to solve this problem, if the strength of the metal enclosure is increased or the lateral strength is increased by adding braces, interference with the busbar occurs, and there is a limit to securing an insulation distance suitable for safety standards.

The background art or prior art described above herein is information possessed by the present inventor or acquired in the process of deriving and completing the present invention, which is helpful in understanding the technical significance of the present invention and is useful for prior art search and examination. However, prior to the filing of the present invention, it is clarified that it does not mean a technique that is generally known and widely used in the art to which the invention belongs, and reference numerals in the prior art are irrelevant to the reference numerals in the present invention. .

KR 10-1247538 B1(2013.03.20) KR 10-1748725 B1(2017.06.13) KR 10-1622459 B1(2016.05.12)

Therefore, the present inventor comprehensively considers the above-mentioned matters and at the same time, in order to solve the technical limitations and problems of the existing solid insulated switchgear technology, the risk of being easily damaged and overturned by safely protecting it from vibration caused by an earthquake or external shock The present invention was created as a result of continuous research with great efforts to develop an earthquake-resistant solid insulated switchgear of a new structure capable of enhancing the earthquake-resistant performance, such as preventing

Therefore, the technical problem and object to be solved by the present invention is to provide an earthquake-resistant solid insulated switchgear that can be safely protected from vibration caused by an earthquake or external shock.

Here, the technical problems and objects to be solved by the present invention are not limited to the technical problems and objects mentioned above, and other technical problems and objects that are not mentioned are the general knowledge in the technical field to which the present invention belongs from the description below. Those who have it will be able to clearly understand.

Specific means according to an aspect of the present invention for effectively achieving a specific technical purpose while embodying a new idea for solving the technical problem of the present invention as described above are several An enclosure skeleton made by assembling frames, a first support frame fixed while occupying a certain space on the upper front inside the enclosure skeleton, a second support frame fixed while occupying a certain space on the lower front inside the enclosure skeleton, the enclosure A third support frame fixed while occupying a certain space in the middle of the back of the skeleton, a fourth support frame fixed to the upper middle of the enclosure skeleton, a fifth support frame fixed to the lower middle of the enclosure skeleton, A first insulating housing that is erected and mounted between the first support frame and the second support frame to maintain stability, and is made of solid insulation to support and protect a circuit breaker for opening and closing load current and blocking fault current, the third support A grounding switch mounted between the frame and the first insulating housing to maintain stability and grounding the circuit made of solid insulator and removing residual current, and first and second circuit switches to change circuit connections or disconnect circuits in a no-load state. A second insulating housing that supports and protects the two disconnectors, and a first branch socket that is mounted vertically and vertically on the upper side of the second insulating housing to maintain stability and is made of solid insulation and connected to the upper part of the first disconnector. A third insulation housing built in to support and protect, an upper mount mounted between the fourth support frame and the third insulation housing, supporting the third insulation housing and fixing it to the fourth support frame, the second insulation The fourth insulating housing, which is mounted vertically and vertically on the lower side of the housing to maintain stability, and supports and protects the second branch socket made of solid insulation and connected to the lower part of the second disconnector, the fourth insulating housing and the fifth support frame. It is mounted between the fourth insulating housing, supports the fourth insulating housing, and adopts a lower mount that is fixed to the fifth support frame. Suggests an earthquake-resistant solid insulated switchgear.

Accordingly, the present invention can achieve an effect of safely protecting from vibration or external impact caused by an earthquake by enhancing seismic performance.

In addition, a preferred embodiment of the present invention is a CB actuator for directly driving the circuit breaker is installed on the first support frame, and an ES actuator for directly driving the ground switch on the third support frame and the first First and second DS actuators for directly driving the first and second disconnectors may be respectively installed.

In addition, in a preferred embodiment of the present invention, the circuit breaker is inserted from top to bottom into a first sleeve made of a cylindrical conductor, a terminal connected in the horizontal direction to the first sleeve, and a hole of the first sleeve, A movable conductor connected to the sleeve, a movable rod connected to the upper end of the movable conductor and moving the movable conductor by the operating force of the CB manipulator, a vacuum interrupter located below the first sleeve and extinguishing an arc, of the vacuum interrupter It may include a first socket located on the lower side and connected to a surge absorber (SA) and a pair of second sockets connected to the first socket in a horizontal direction and connected to a bus bar.

In addition, in a preferred embodiment of the present invention, the ground switch is composed of a first connection conductor connected to the terminal, a cylindrical ground conductor for grounding with the outside, and a conductor to connect the first connection conductor and the ground conductor. It may be configured to include a first slider that opens and closes by opening or closing and a first ball screw that moves the first slider with the operating force of the ES manipulator.

In addition, as a preferred embodiment of the present invention, the first disconnector is connected to the second connection conductor connected to the terminal, a second sleeve made of a cylindrical conductor, and connected to the second sleeve to connect a connector for a branch cable. A second slider made of a first branch socket and a conductor to open and close by connecting or separating the second connection conductor and the second sleeve, and a second ball screw that moves the second slider with the operating force of the 1DS manipulator can be configured to include

In addition, as a preferred embodiment of the present invention, the second disconnector is connected to the third connection conductor connected to the terminal, a third sleeve made of a cylindrical conductor, and connected to the third sleeve to connect a connector for a branch cable. A third slider made of a second branch socket and a conductor to open and close by connecting or separating the third connection conductor and the third sleeve, and a third ball screw that moves the third slider with the operating force of the 2DS manipulator can be configured to include

In addition, as a preferred embodiment of the present invention, the first insulating housing is a vertical housing formed to support and protect the first sleeve, the movable conductor, the movable rod, the vacuum interrupter, and the first socket by embedding therein. , The first horizontal housing integrally formed on the upper part of the vertical housing and formed to support and protect the terminal by embedding and integrally formed on the lower part of the vertical housing and formed to support and protect the second socket by embedding It may be configured to include a second horizontal housing.

In addition, in a preferred embodiment of the present invention, the second insulating housing has a central portion formed to support and protect portions of the first connection conductor, the ground conductor, the first slider, and the first ball screw. An upper housing integrally formed above the housing and the central housing and built to support and protect the second connection conductor, the second sleeve, the second slider, and the second ball screw, and the lower part of the central housing and a lower housing formed integrally with the third connection conductor, the third sleeve, the third slider, and the third ball screw to support and protect the third ball screw.

In addition, as a preferred embodiment of the present invention, the enclosure skeleton is arranged horizontally in the X-axis direction, the first main frame horizontally arranged in the Y-axis direction, the second main frame arranged horizontally in the Y-axis direction, and arranged vertically in the Z-axis direction. A corner bracket formed by bending a thin and flat metal plate to have first to third joint surfaces intersecting at right angles to each other in order to be bonded to the corner portion where the third main frame and the first to third main frames meet. Including, through-holes for fastening by bolting are formed on the first and second joint surfaces of the corner brackets that come into contact with the first to third main frames, and a portion of the first joint surface of the corner bracket is formed on the first joint surface of the corner bracket. When the main frame and the third main frame come into contact with each other, the first main frame and the third main frame are overlapped in order to flatly combine the first main frame and the third main frame while eliminating the step difference caused by the thickness of the third main frame. It can be.

According to the technical idea and embodiment of the present invention, on which a unique solution is based to solve the above technical problem, the weight distribution of each constituent device and part within the enclosure frame is not eccentric, and the weight distribution is balanced vertically and horizontally. By arranging them in a cross shape as much as possible, stress concentration can be prevented when vibrations caused by earthquakes or external shocks are applied, as well as earthquake-resistant performance can be strengthened to prevent easy falls due to an unbalanced center of gravity for safe protection.

Here, the effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a single-line diagram of a solid insulated switchgear according to the prior art.
2 is a perspective view schematically showing an earthquake-resistant solid insulated switchgear according to an embodiment of the present invention.
3 is a schematic cross-sectional view of an earthquake-resistant solid insulated switchgear according to an embodiment of the present invention.
4 is a cross-sectional view showing a local portion in an input state among main elements constituting an earthquake-resistant solid insulated switchgear according to an embodiment of the present invention.
5 is a perspective view showing an enclosure skeleton among main elements constituting an earthquake-resistant solid insulated switchgear according to an embodiment of the present invention.
6 is a perspective view showing a partial disassembly of an enclosure frame among major elements constituting an earthquake-resistant solid insulated switchgear according to an embodiment of the present invention.
7 is a perspective view showing a corner bracket among the main elements constituting an earthquake-resistant solid insulated switchgear according to an embodiment of the present invention.

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

Prior to this, the terms to be described below are defined in consideration of functions in the present invention, which specifies that they should be interpreted as concepts consistent with the technical spirit of the present invention and meanings commonly used or commonly recognized in the art.

In addition, if it is determined that a detailed description of a known function or configuration related to the present invention may obscure the gist of the present invention, the detailed description will be omitted.

The accompanying drawings may be exaggerated or simplified in part to help explain and understand the configuration and operation of the technology, and each component on the drawings does not exactly match the actual size and shape. reveal

In addition, in this specification, the term and / or is meant to include a combination of a plurality of related items described or any item among a plurality of related items described, and when a certain part includes a certain component, this is particularly the opposite. Unless otherwise stated, it means that other components may be further included rather than excluding other components.

That is, terms such as 'include' or 'have' described in this specification mean that a feature, number, step, operation, component, part, or combination thereof exists, but one or the It should be understood that the above does not preclude the possibility of the presence or addition of other features or numbers, step operating components, parts, or combinations thereof.

On the other hand, the meaning of "unit" and "unit" used in the present invention means a module type that plays a role or unit that processes at least one function or a certain operation for the purpose of the system, which is hardware or software or hardware and It can be implemented as a means through software combination, etc., or as a device or assembly capable of performing an independent operation.

In addition, terms such as top, bottom, top, bottom, or top, bottom, top, bottom, front and rear, left and right used in the present invention are used for convenience to distinguish the relative positions of each component. For example, an upper part in the drawing may be named or referred to as an upper part, a lower part may be named or referred to as a lower part, a longitudinal direction may be named or referred to as a front-back direction, and a width direction may be named or referred to as a left-right direction.

In addition, terms such as first and second used in the present invention may be used to describe various components. That is, terms such as first and second may be used for the purpose of distinguishing one component from another.

As shown in FIGS. 2 to 6, the main elements constituting the earthquake-resistant solid insulated switchgear according to the embodiment of the present invention are the enclosure frame 10, the first to fifth support frames 21, 22, 23 ) (24) (25), the first to fourth insulating housings (30) (40) (50) (60), an upper mount (51) and a lower mount (61).

2 shows all of the R, S, and T phases constituting the earthquake-resistant solid insulated switchgear according to the embodiment of the present invention, but in FIGS. 3 and 4, for convenience of description, Only one of the R, S, and T phases constituting the true solid insulated switchgear will be described as an example. In addition, the structures of the R, S, and T phases are all the same.

The enclosure frame 10 is a cubicle made by connecting and assembling several first to third main frames 11, 12, and 13 located at the corners of a rectangular parallelepiped with corner brackets 15 and reinforcing with several reinforcing frames. It is formed as a base structure in the form of a cubicle.

That is, as shown in FIGS. 5 to 7, the enclosure frame 10 includes a first main frame 11 horizontally disposed in the X-axis direction and a second main frame 12 horizontally disposed in the Y-axis direction. And the third main frame 13 disposed vertically in the Z-axis direction is positioned at the corner of the rectangular parallelepiped, and a thin and flat metal plate is bent to form the first to third joint surfaces 16, 17, and 18 The corner brackets (15) formed to cross each other at right angles are symmetrically attached to the eight corners where the first to third main frames (11, 12, and 13) meet, and bolted to strengthen structural rigidity. It is possible to maintain an assembled state and a stable posture, to reduce the response magnification of displacement during vibration, and to reduce the acceleration applied to internal electric devices.

In addition, an outward flange 11a extending outward is formed on the upper part of the surface in contact with the corner bracket 15 of the first main frame 11, and an inward flange 11b extending inward is formed on the lower part.

In addition, on one side of the surface of the third main frame 13 in contact with the second main frame 12, an inwardly projecting flange 13a is formed, and on the opposite side, an outwardly projecting flange 13b is formed. is formed

In addition, through holes for bolting are formed in the first and second joint surfaces 16 and 17 of the first to third main frames 11, 12, and 13 and the corner bracket 15, respectively.

In addition, a part of the first joint surface 16 of the corner bracket 15 is the outer flange 13b of the third main frame 13 when the first main frame 11 and the third main frame 13 come into contact. It is composed of double overlapping in order to flatly combine the first main frame 11 and the third main frame 13 while eliminating the step difference caused by the thickness.

That is, the portion of the first joint surface 16 of the corner bracket 15 that is in contact with the first main frame 11 is formed in a double overlapping form by bending a thin and flat metal plate, and the third main frame 13 The edge 19 of the part facing the is formed relatively thin in thickness.

Here, the first to third main frames 11, 12, 13 and the corner bracket 15 may be manufactured by bending a rolled steel plate, a galvanized steel plate, a stainless steel plate, an aluminum plate, or the like.

The first support frame 21 is fixed to maintain stability while occupying a certain space on the front upper part of the inside of the enclosure frame 10.

That is, the first support frame 21 is composed of a cage-shaped frame three-dimensionally assembled by connecting several frames to each other by a bolting fastening method.

In addition, a CB manipulator 71 for directly driving the circuit breaker 70 is installed in the inner space of the first support frame 21 .

In addition, the CB manipulator 71 may drive the circuit breaker 70 by the operation of an actuator that transmits force to the movable rod 75 connected thereto as the mover moves up/down.

Here, as the CB manipulator 71, a Permanent Magnetic Actuator (PMA) having a small number of drive mechanism components, high reliability, and low maintenance burden may be employed.

On the other hand, the circuit breaker 70 is for opening and closing the load current and blocking the fault current, the first sleeve 72 made of a cylindrical conductor such as copper (Cu) or aluminum (Al), the back of the first sleeve 72 is placed in the horizontal direction and electrically connected to the terminal 73 made of a conductor such as copper (Cu) or aluminum (Al), inserted from top to bottom into the hollow of the first sleeve 72, A movable conductor 74 that is always connected, a vacuum interrupter 75 that is located on the lower side of the first sleeve 72 and extinguishes the arc generated when opening and closing the contact, and is made of an insulator and connected to the upper end of the movable conductor 74, The movable rod 76, which moves the movable conductor 74 and the movable contact in the vacuum interrupter 75 up and down by the operating force of the CB manipulator 71, is located below the vacuum interrupter 75 and has an upper end of the vacuum interrupter A first socket 77 connected to the fixed contact in 75 and connected to the surge absorber SA and a pair of second sockets 78 connected to the first socket 77 in the horizontal direction and connected to the busbar ) is included.

That is, the circuit breaker 70 can achieve a closed state when the movable contact connected to the lower end contacts the fixed contact in the vacuum interrupter 75 as the movable rod 76 descends, and the movable rod 76 rises. Accordingly, when the movable contactor is separated from the fixed contactor in the vacuum interrupter 75, an open state can be achieved.

Here, it is preferable that the operating state of the circuit breaker 70 is made of a structure that can be confirmed by an indicator light and a mechanical position display in the operation monitoring panel.

In addition, the conductor constituting the terminal 73, the first socket 77, and the second socket 78 is formed as a pipe-shaped hollow body with a hole in the middle, so that heat is transferred to the air existing in the internal space to dissipate heat. Not only can this be done quickly, but also the weight can be reduced and the cost can be reduced.

On the other hand, the second socket 78 is an INCOMING board to which power is input, and when applied, it is electrically connected to the bus line (power line) on the power input side and serves as an input terminal through which current supplied from the power flows into the circuit breaker 70, When applied as a FEEDER panel where power is distributed, it is electrically connected to the bus (power line) at the end of use, and serves as an output terminal through which the current entering the circuit breaker 70 flows out to the load.

The second support frame 22 is fixed to maintain stability while occupying a certain space at the front lower part of the inside of the enclosure frame 10.

That is, the second support frame 22 is composed of a cage-shaped frame three-dimensionally assembled by connecting several frames to each other by a bolting fastening method.

In addition, in the inner space of the second support frame 22, a surge absorber (SA) that absorbs an instantaneous voltage wave caused by lightning and a current transformer (CT) that senses the current on the line and converts the large current received and distributed into a small current and supplies it) etc. may be installed.

The third support frame 23 is fixed to maintain stability while occupying a certain space in the rear center portion of the inside of the enclosure frame 10.

That is, the third support frame 23 is composed of a cage-shaped frame three-dimensionally assembled by connecting several frames to each other by a bolting fastening method.

And, in the inner space of the third support frame 23, the ES manipulator 81 for directly driving the ground switch 80 and the first and second disconnectors 90 and 100 for directly driving the first and second disconnectors 90 and 100, respectively. A 2DS manipulator (91) (101) is installed.

Here, as the ES manipulator 81 and the first and second DS manipulators 91 and 101, structures such as a mechanical motor operation type, a motor spring mechanical operation type, and a manual operation type may be adopted.

On the other hand, the grounding switch 80 is for grounding the circuit and discharging the residual current to the ground to remove it, which occurs when the fault current is energized for the first connection conductor 82 electrically connected to the terminal 73 and the outside for grounding. A cylindrical grounding conductor (83) made of copper material that sufficiently withstands thermal and mechanical stress, and a first slider (84) that opens and closes the first connecting conductor (82) and the grounding conductor (83) by connecting or separating them. and a first ball screw 85 operated by the operating force of the ES manipulator 81 to slide and move the first slider 84 in the forward and backward directions.

That is, the screw shaft of the first ball screw 85 is directly or indirectly connected to the driving motor of the ES manipulator 81, rotates forward and backward with the driving force of the driving motor, and fixes to the nut of the first ball screw 85. By sliding the slider 84 in the forward and backward directions, the first connection conductor 82 and the ground conductor 83 can be connected or separated.

Here, the folding switch 80 can block current flow to the circuit breaker 70 or the first and second disconnectors 90 and 100 by flowing current to the ground.

In addition, the first disconnector 90 includes a second connection conductor 92 electrically connected to the terminal 73, a second sleeve 93 made of a cylindrical conductor such as copper (Cu) or aluminum (Al), and a second sleeve ( 93) and a first branch socket 94 for connecting the branch cable connector (C), made of a conductor, to connect or separate the second connection conductor 92 and the second sleeve 93 to open and close The second ball screw 96 is operated by the operating force of the second slider 95 and the 1DS manipulator 91 to slide the second slider 95 forward and backward.

That is, the screw shaft of the second ball screw 96 is directly or indirectly connected to the driving motor of the 1DS manipulator 91, rotates forward and backward with the driving force of the driving motor, and is fixed to the nut of the second ball screw 96. The second connection conductor 92 and the second sleeve 93 can be connected or separated by sliding the two sliders 95 in the forward and backward directions.

In addition, the second disconnector 100 includes a third connection conductor 102 electrically connected to the terminal 73, a third sleeve 103 made of a cylindrical conductor such as copper (Cu) or aluminum (Al), and a third sleeve The second branch socket 104 connected to (103) and for connecting the branch cable connector (C), made of a conductor, connects or separates the third connection conductor 102 and the third sleeve 103 to open and close and a third ball screw 106 that slides and moves the third slider 105 in the forward and backward directions with the operating force of the third slider 105 and the 2DS manipulator 101.

That is, the screw shaft of the third ball screw 106 is directly or indirectly connected to the driving motor of the 2DS manipulator 101, rotates forward and backward with the driving force of the driving motor, and is fixed to the nut of the third ball screw 106. The third connection conductor 102 and the third sleeve 103 can be connected or separated by sliding the 3 sliders 105 in the forward and backward directions.

Here, the first and second disconnectors 90 and 100 can cut off the flow of current to cut off the current flow to the ground switch 80 or the place of use, and the mechanical and electrical position indicators can clearly distinguish the operating state .

In addition, the conductor constituting the first branch socket 94 and the second branch socket 104 is formed as a pipe-shaped hollow body with a hole in the middle, so that heat is transferred to the air existing in the internal space so that heat dissipation can be done quickly. Not only can it be made, but the weight can be reduced and the cost can be reduced.

The fourth support frame 24 is fixed to the enclosure skeleton 10 across the upper middle portion of the enclosure skeleton 10 .

The fifth support frame 25 is fixed to the enclosure skeleton 10 across the lower middle portion of the enclosure skeleton 10 .

The first insulating housing 30 is made of a solid insulator such as epoxy resin having considerable mechanical strength while maintaining the necessary insulation performance for a long period of time to support and surround the circuit breaker 70 for opening and closing the load current and blocking the fault current. It forms a hollow cylinder, and is mounted upright to maintain stability between the first support frame 21 and the second support frame 22.

The first insulating housing 30 is composed of a vertical housing 31, a first horizontal housing 32, and a second horizontal housing 33.

The vertical housing 31 includes the first sleeve 72, the movable conductor 74, the movable rod 75, the vacuum interrupter 76 and the first socket 77 constituting the circuit breaker 70 to support and protect it. It is formed vertically and long so as to do so.

And, the upper end of the vertical housing 31 is fastened to the first support frame 21 by bolting, and the lower end of the vertical housing 31 is fastened to the second support frame 22 by bolting.

In addition, a diaphragm is installed between the upper surface of the vertical housing 31 and the first support frame 21 to close except for a minimum passage for the movable rod 75 of the circuit breaker 70 to move up and down.

The first horizontal housing 32 is formed long in the front and back to support and protect the terminal 73 constituting the circuit breaker 70, and is integrally formed by extending horizontally to the rear of the upper part of the vertical housing 31 .

The second horizontal housing 33 extends horizontally to the rear of the lower part of the vertical housing 31 to support and protect the second socket 77 constituting the circuit breaker 70 and is integrally formed.

The second insulating housing 40 includes a grounding switch 80 for grounding the circuit and removing residual current, and first and second disconnectors 90 and 100 for changing the connection of the circuit or disconnecting the circuit in a no-load state. It is made of a solid insulator such as epoxy resin that has considerable mechanical strength while maintaining the insulation performance necessary for support and enclosing protection for a long period of time, forming a hollow cylinder, and the third support frame 23 and the first insulation housing 30 It is mounted to maintain stability between the first horizontal housings 32.

That is, the second insulating housing 40 is formed long in front and back, and is connected side by side to the rear end of the first horizontal housing 32 of the first insulating housing 30 .

And the second insulating housing 40 is composed of a central housing 41, an upper housing 42, and a lower housing 43 to improve the insulation effect.

The central housing 41 is formed to accommodate, support, and protect front portions of the screw shafts of the first connection conductor 82, the ground conductor 83, the first slider 84, and the first ball screw 85.

In addition, an insulation space having a relatively long insulation creepage distance is formed on the inner circumferential surface of the central housing 41 by continuously having round-shaped wrinkles or irregularities.

The upper housing 42 is integrally formed above the central housing 41, and includes the second connection conductor 92, the second sleeve 93, and the second slider 95 constituting the first disconnector 90. And it is formed long in front and back to accommodate and support and protect the second ball screw 96.

In addition, an insulating space having a relatively long insulation creepage distance is formed on the inner circumferential surface of the upper housing 42 by continuously having round-shaped wrinkles or irregularities.

In addition, the front side of the upper housing 42 is coupled to the first horizontal housing 32 of the first insulating housing 30, and the rear side is bolted to the third support frame 23.

In addition, between the rear end surface of the upper housing 42 and the third support frame 23, the screw shaft of the second ball screw 96 constituting the first disconnector 90 is closed except for a minimum space for rotational movement. A diaphragm is installed.

The lower housing 43 is integrally formed below the central housing 41, and includes the third connecting conductor 102, the third sleeve 103, and the third slider 105 constituting the second disconnector 100. And it is formed long in front and back to accommodate and support and protect the third ball screw 106.

In addition, an insulating space having a relatively long insulation creepage distance is formed on the inner circumferential surface of the lower housing 43 by continuously having round-shaped wrinkles or irregularities.

In addition, the front side of the lower housing 43 is coupled to the first horizontal housing 32 of the first insulating housing 30, and the rear side is bolted to the third support frame 23.

In addition, between the rear end surface of the lower housing 73 and the third support frame 23, the screw shaft of the third ball screw 106 constituting the second disconnector 100 is closed except for a minimum space for rotational movement. A diaphragm is installed.

The third insulating housing 50 is an epoxy resin with significant mechanical strength while maintaining the insulation performance necessary for long-term protection by embedding and supporting and surrounding the first branch socket 94 connected to the upper part of the first disconnector 90 It is made of a solid insulator such as a hollow cylinder, and is mounted on the upper side of the second insulating housing 40 to maintain stability.

That is, the third insulating housing 50 is vertically formed to support the upper portion of the second insulating housing 40 while supporting and protecting the first branch socket 94 therein.

The upper mount 51 is fixed to the fourth support frame 24 to support the third insulating housing 50 so as not to move, and is made of a solid insulating material having insulating performance and considerable mechanical strength, and the fourth support frame ( 24) and the third insulating housing 50 are mounted at a constant height.

And the upper mount 51 is fixed to the upper surface of the upper joint plate 52 for supporting and reinforcing the third insulating housings 50 of the R, S, and T phases by tightening them with bolts or the like.

Here, the upper mount 51 may be fixed by bolting the upper end of the third insulating housing 50 to the fourth support frame 24 .

The fourth insulating housing 60 is an epoxy resin with considerable mechanical strength while maintaining the insulation performance necessary for long-term protection by embedding and supporting and surrounding the second branch socket 104 connected to the lower part of the second disconnector 100 It is made of a solid insulating material such as a hollow cylinder, and is mounted on the lower side of the second insulating housing 40 to maintain stability.

That is, the fourth insulating housing 60 is formed vertically long to support the lower portion of the second insulating housing 40 while supporting and protecting the second branch socket 104 therein.

Here, the first to fourth insulating housings 30, 40, 50, and 60 may be formed by injection molding, respectively.

The lower mount 61 is fixed to the fifth support frame 25 to support the fourth insulating housing 60 so as not to move, and is made of a solid insulating material having insulating performance and considerable mechanical strength, and the fifth support frame ( 25) and the fourth insulating housing 60 are mounted at a constant height.

And the lower mount 61 is fixed to the lower surface of the lower joint plate 62 for supporting and reinforcing the fourth insulating housings 60 of the R, S, and T phases by tightening them with bolts or the like.

Here, the lower mount 61 may be fixed by bolting the lower end of the fourth insulating housing 60 to the fifth support frame 25 .

On the other hand, the first to fourth insulating housings 30, 40, 50, and 60, the circuit breaker 70, the grounding switch 80, and the first and second disconnectors 90 and 100 are the enclosure skeleton ( 10) It is possible to supply electricity to a plurality of places of use by continuously installing a plurality of them within, and at this time, mutually adjacent busbars can be interconnected.

The earthquake-resistant solid insulated switchgear according to the embodiment of the present invention configured as described above is a combination of the first insulation housing 30 for protecting the circuit breaker 70 by solid insulation in the enclosure frame 10 and the grounding switch 80 The second insulation housing 40 that protects the first and second disconnectors 90 and 100 by solid insulation and the first branch socket 94 connected to the upper side of the first disconnector 90 is protected by solid insulation. The weight distribution is not eccentric, and the weight distribution is not eccentric, By arranging in a cross shape and fixing to the enclosure frame 10 so as to have a balanced distribution state, concentration of stress can be prevented when vibration due to an earthquake or external impact is applied.

In addition, by distributing the weight of various components and parts installed in the enclosure frame 10 on the first to fifth support frames 21, 22, 23, 24, and 25, the weight is greatly shifted to either side. Due to the stability of the unbeaten balance, it can be prevented from shaking or falling easily.

On the other hand, the present invention is not limited by the above-described embodiments (embodiment) and the accompanying drawings, and can be variously modified and applied in various ways not illustrated within the scope without departing from the technical spirit of the present invention, as well as each It is clear to those of ordinary skill in the art that the components can be widely applied by substitution of components and changes to other equivalent embodiments.

Therefore, contents related to the modification and application of the technical features of the present invention should be interpreted as being included within the technical spirit and scope of the present invention.

10: Enclosure skeleton 11: 1st main frame
12: 2nd main frame 13: 3rd main frame
15: corner bracket 16: first joint surface
17: second joint surface 18: third joint surface
21: first support frame 22: second support frame
23: third support frame 24: fourth support frame
25: 5th support frame 30: 1st insulating housing
31: vertical housing 32: first horizontal housing
33: second horizontal housing 40: second insulating housing
41: central housing 42: upper housing
43: lower housing 50: third insulating housing
51: upper mount 52: upper joint plate
60: 4th smoke housing 61: lower mount
62: lower joint plate 70: circuit breaker
71: CB actuator 72: first sleeve
73: terminal 74: movable conductor
75: Vacuum interrupters
76: movable rod 77: first socket
78: second socket 80: ground switch
81: ES actuator 82: first connection conductor
83: ground conductor 84: first slider
85: first ball screw 90: first disconnector
91: 1DS manipulator 92: 2nd connection conductor
93: second sleeve 94: first branch socket
95: second slider 96: second ball screw
100: 2nd disconnector 101: 2DS manipulator
102: third connection conductor 103: third sleeve
104: second branch socket 105: third slider
106: third ball screw C: connector

Claims (3)

An enclosure skeleton 10 made by assembling several frames located at the corners of a rectangular parallelepiped;
A first support frame 21 fixed while occupying a certain space on the front upper part of the inside of the enclosure frame 10;
A second support frame 22 fixed while occupying a certain space at the front lower portion of the inside of the enclosure frame 10;
A third support frame 23 fixed while occupying a certain space in the rear center portion of the inside of the enclosure frame 10;
A fourth support frame 24 fixed to the upper middle portion of the enclosure frame 10;
A fifth support frame 25 fixed to the lower middle portion of the enclosure frame 10;
It is mounted upright between the first support frame 21 and the second support frame 22 to maintain stability, and to support and protect the circuit breaker 70 made of solid insulation to block load current opening and closing and fault current. A first insulating housing 30 to;
A grounding switch 80 installed between the third support frame 23 and the first insulating housing 30 to maintain stability and to ground a circuit made of solid insulation and to remove residual current, and in a no-load state a second insulating housing 40 that supports and protects the first and second disconnectors 90 and 100 that change circuit connections or disconnect circuits;
The upper side of the second insulating housing 40 is vertically erected to maintain stability, and a first branch socket 94 made of solid insulation and connected to the upper part of the first disconnector 90 is built in to support and A third insulating housing 50 to protect;
an upper mount 51 installed between the fourth support frame 24 and the third insulating housing 50 and fixed to the fourth support frame 24 to support the third insulating housing 50;
The second branch socket 104 made of solid insulation and connected to the lower part of the second disconnector 100 is built in to maintain stability by being mounted vertically and vertically on the lower side of the second insulating housing 40 to support and A fourth insulating housing 60 to protect; and
a lower mount 61 mounted between the fifth support frame 25 and the fourth insulation housing 60 and fixed to the fifth support frame 25 to support the fourth insulation housing 60;
Including,
A CB actuator 71 for directly driving the circuit breaker 70 is installed on the first support frame 21, and an ES actuator for directly driving the ground switch 80 on the third support frame 23 81, and first and second DS actuators 91 and 101 for directly driving the first and second disconnectors 90 and 100, respectively, are installed,
The circuit breaker 70,
a first sleeve 72 made of a cylindrical conductor;
a terminal 73 connected to the first sleeve 72 in a transverse direction;
a movable conductor 74 inserted into the hollow of the first sleeve 72 from top to bottom and connected to the first sleeve 72;
a vacuum interrupter (76) located below the first sleeve (72) and extinguishing an arc generated when the contact is opened and closed;
a movable rod 75 connected to an upper end of the movable conductor 74 and vertically moving the movable conductor 74 and the movable contact in the vacuum interrupter 76 with the operating force of the CB manipulator 71;
a first socket 77 located below the vacuum interrupter 76 and connected to a surge absorber SA; and
a pair of second sockets 78 connected to the first socket 77 in a horizontal direction and connecting a bus bar;
including,
The grounding switch 80,
a first connection conductor 82 electrically connected to the terminal 73;
a cylindrical grounding conductor 83 for grounding;
a first slider (84) made of a conductor that opens and closes the first connection conductor (82) and the ground conductor (83) by connecting or separating them; and
a first ball screw 85 that moves the first slider 84 back and forth with the operating force of the ES manipulator 81;
including,
The first disconnector 90,
a second connection conductor 92 electrically connected to the terminal 73;
a second sleeve 93 made of a cylindrical conductor;
a first branch socket (94) connected to the second sleeve (93) and for connecting a connector (C) for a branch cable;
a second slider (95) made of a conductor that opens and closes by connecting or separating the second connection conductor (92) and the second sleeve (93); and
a second ball screw 96 that moves the second slider 95 back and forth with the operating force of the 1DS manipulator 91;
including,
The second disconnector 100,
a third connection conductor 102 electrically connected to the terminal 73;
a third sleeve 103 made of a cylindrical conductor;
a second branch socket (104) connected to the third sleeve (103) and for connecting a connector (C) for a branch cable;
a third slider 105 made of a conductor that opens and closes by connecting or separating the third connection conductor 102 and the third sleeve 103; and
a third ball screw 106 that moves the third slider 105 back and forth with the operating force of the 2DS manipulator 101;
Containing, earthquake-resistant solid insulated switchgear.
delete According to claim 1,
The first insulating housing 30,
a vertical housing (31) formed to support and protect the first sleeve (72), the movable conductor (74), the movable rod (75), the vacuum interrupter (76), and the first socket (77);
a first horizontal housing 32 integrally extending from the top of the vertical housing 31 and built to support and protect the terminal 73; and
a second horizontal housing 33 integrally extending from the lower portion of the vertical housing 31 and built to support and protect the second socket 78;
Including,
The second insulating housing 40,
a central housing (41) formed to support and protect front portions of the first connection conductor (82), the ground conductor (83), the first slider (84), and the first ball screw (85);
It is integrally formed above the central housing 41, and the second connection conductor 92, the second sleeve 93, the second slider 95, and the second ball screw 96 are embedded in the an upper housing 42 formed to support and protect; and
It is integrally formed below the central housing 41, and the third connection conductor 102, the third sleeve 103, the third slider 105, and the third ball screw 106 are built in, a lower housing 43 formed to support and protect;
Containing, earthquake-resistant solid insulated switchgear.

Images