KR20100027732A - Solid insulated high voltage load break switch for 25.8kv overhead line - Google Patents

Abstract

PURPOSE: A high voltage load break switch is provided to decrease a product failure rate by molding a vacuum interrupter stored within a polymer insulating tube and a composite reinforced insulation tube to a polymer insulating housing. CONSTITUTION: A first bushing(24) and a second bushing(25) are respectively formed by inserting the first bushing conductor(22) and the second bushing conductor(23) to the left and right side of an insulating housing(1) formed by a polymer. An upper part fixing electrode is inserted into the center of the insulating housing to the vertical direction. A vacuum interrupter(3) is formed by uniting the first bushing conductor, a lower movable electrode, and the second bushing conductor with each first and second subsidiary conductor. The vacuum interrupter is dually covered with a polymer insulating tube(4) and a composite reinforced insulation tube(2).

Description

SOLID INSULATED HIGH VOLTAGE LOAD BREAK SWITCH FOR 25.8kV OVERHEAD LINE}

The present invention relates to a high voltage load switch for a solid insulated overhead line.

In particular, the present invention forms a polymer insulating housing to the outside with a vacuum interrupter (Vacuum interrupter) and the filling portion is inserted into the composite reinforced insulation tube to maximize the mechanical strength after molding and protection of the important components, and the filling portion is flexible Sealed by diaphragm and environmentally friendly insulating gas, the electrical reliability of the electrical circuit is maximized by perfect electrical insulation, and the solid insulation overhead line that can be compacted by reducing the volume of the overall insulation housing by simplifying the connection configuration with the main body of the manipulator. High voltage load switch.

In general, the load switch for processing is installed on the ground and used for line branch and line division.

The load switch for the overhead line was used in Korea for the multi-circuit manual or automatic switchgear by SF ₆ gas insulation method. However, due to environmental pollution and explosion, the solid-state insulation switch of vacuum insulation method has been developed and used recently. have. However, foreign countries have used a mixture of SF ₆ gas insulation, insulating oil or gas, and vacuum insulation for a long time.

Patents related to such a solid-insulated high voltage switch include Patent Publication No. 10-1997-51595 (published: July 29, 1997), Patent Publication No. 10-1997-0051592 (published: July 29, 1997) ), Patent Publication No. 10-2005-70541 (published: July 7, 2005), Patent Publication No. 10-2006-119402 (published: November 24, 2006), Patent No. 10-2007 -718494 (Registration Date: May 9, 2007), Patent No. 10-2007-718497 (Registration Date: May 9, 2007) and many other technologies are disclosed,

Foreign patents include US Patent No. 4,150,270 (Registration Date: April 17, 1979), US Patent No. 3,471,669 (October 7, 1969), US Patent No. 4,124,790 (Registration Date: November 7, 1978) Numerous techniques, such as), have been disclosed.

The Korean Patent Application Publication No. 10-1997-51595 (published date: July 29, 1997) forms a housing with an elastic rubber material on the outer surface of a hollow reinforcing element, and a bottle, a bottle and a reinforcement having a control atmosphere inside the housing. A capsulated high voltage switch consisting of an elastic rubber material and different fillers between elements.

However, the encapsulated high voltage switch of the above configuration has only a main circuit, and there is no separate circuit for grounding, and there is no voltage detecting device for detecting voltage.

The Korean Patent Publication No. 10-1997-51592 (published: July 29, 1997) is characterized in that the diaphragm for contact insulation is mechanically and chemically bonded to the housing and the shaft.

However, in the above configuration, the diaphragm interface may deteriorate due to electric field concentration in such a manner that the contact portion is insulated only by the diaphragm.

Korean Laid-Open Patent Publication No. 10-2005-70541 (published 07 July 2005) includes an insulating housing molded with a polymer to protrude first and second bushings to correspond to left and right surfaces, and a contact function. It relates to a polymer insulating breaker / switchgear consisting of a vacuum opening and closing unit, an operating shaft connected to the opening and closing portion, a spring applying a force to the operating shaft, a driving arm connected to the operating shaft, and an operation unit for operating the driving arm.

However, since the driving rod part connected to the vibration opening and closing part of the above configuration is not electrically separated from the manipulator part, it may cause electric flashover due to an electrical defect, and also a space for maintaining an electrical insulation distance from the manipulator part. This is necessary, and the sealing is maintained only by the O-ring in the lower part of the housing for the mechanical sealing of the electric circuit, there is a possibility that the problem of the generation of internal moisture due to the temperature difference.

US Pat. No. 3,471,669 has a bushing and a housing integrally molded with elastic rubber material, and includes movable and fixed contact assemblies at both ends of the vacuum interrupter, and the movable contact assembly is connected to the manipulator to open and close.

However, the above configuration is formed in a state in which the manipulator portion is installed in the housing, there is no way to repair when a problem occurs in the manipulator portion, and the size of the housing is also increased.

U.S. Patent No. 4,124,790 has a housing molded from an epoxy or solid insulator, an elastic material such as a rubber material arranged on the contact surface of the vacuum interrupter and the housing, and a rubber tube formed on the outer surface by applying a guide tube to the outside of the driving rod. It is encapsulated in a structure.

However, the above structure is relatively large because the vacuum interrupter size is relatively large, and the internal electric circuit device configuration is complicated.

U.S. Patent No. 4,150,270 applies high-resistance paint to the housing part formed of solid insulation, the vacuum interrupter and the housing contact surface, and a flexible, moving diaphragm such as rubber that mechanically and chemically bonds the driving rod and the inside of the housing with insulating oil or insulation. The gas is sealed inside the housing to maintain electrical insulation, and the manipulator portion is connected to the movable contact assembly and bolted to the housing.

However, the above-described technology has a limited construction protection due to the weak structure protection of the vacuum interrupter and the partial discharge and the overall length.

In addition, the source technology has a weak molding protection of the vacuum interrupter, and has a weak mechanical strength due to external impact. In particular, the source technology has a weak insulation of connection points (charge parts) connected to the upper and lower electrodes of the vacuum interrupter. There was a disadvantage that the service life is shortened by the breakdown of the insulation by partial discharge.

Accordingly, the present invention solves all the problems of the prior art, and in particular, the weak disadvantage of the molding protection of the source technology and the weakness of the guarantee of mechanical strength, due to the incomplete sealing and partial discharge of the connection point (charge part) in which the electrical connection is made It is an object of the present invention to provide maximum protection of mechanical strength and service life as well as molding protection of an internal component according to external polymer insulating housing molding by improving the disadvantage of dielectric breakdown.

In other words, the present invention is formed by inserting a vacuum interrupter coupled by insert molding inside a polymer insulation housing for solid insulation, surrounded by a double insulation tube of a polymer insulation tube and a composite reinforced insulation tube, thereby maximizing molding protection, enhancing mechanical strength, and filling parts. It is a characteristic purpose to maximize the lifespan by the complete blocking of partial discharge as well as the improvement of the electrical characteristics by the full sealing.

In addition, the present invention is to maximize the safety by providing a complete separation of the internal mechanical connection point (charge unit) as well as the electrical separation from the polymer insulation housing, the outside, that is, the internal high voltage.

In order to achieve the above object, in the present invention, a vacuum interrupter insert-molded inside the polymer insulating housing is molded in a state in which the polymer insulated tube and the composite reinforced reinforced tube are double wrapped to form an internal component of the polymer insulating housing. It is characterized by maximizing molding protection.

In addition, the composite reinforcement insulated tube is extended to the manipulator side and surrounded by an insulated housing, and constituted by a sealed space portion sealed to insulate the charging portion with the insulating rod connected to the manipulator to charge the insulating gas to improve the insulation performance Is characteristic.

In addition, the sealed space portion is applied to the sealed space by a conductive barrier film hermetically sealing the inner circumferential surface of the composite reinforced insulating tube and the outer circumference of the insulating rod of the manipulator, and a double diaphragm of the insulating support membrane to provide insulation while preventing expansion of the conductive barrier film. It is characterized in that the sealing part of the charging part is provided at the same time as the insulation breakdown is prevented by the voltage concentration dispersion by the high voltage.

In addition, the filling of the insulating gas in the sealed space is characterized in that it is easy to charge through the fixed terminal connection block of the intermediate means for supporting the movable electrode of the vacuum interrupter.

In addition, the charging portion connected to the lower electrode of the vacuum interrupter is accommodated by the composite reinforced insulating tube, and the insulation gas filled therein prevents breakdown due to the improvement of insulation performance.

In addition, the connection point (charge part) of the upper electrode and the lower electrode of the vacuum interrupter shields the partial discharge of the charging part by forming the composite reinforced insulating tube inside the polymer insulating housing and then lifting the interface between the reinforced insulating tube and the polymer insulating housing. It is characterized by minimizing insulation breakdown by molding a polymer insulating housing after molding semi-conductive rubber on the outer side of live parts to improve insulation performance.

In addition, the electrical isolation of the outer polymer insulation housing and the internal high voltage part, as well as the separation of the internal mechanical connection point (charge part) are completely provided to maximize safety and reliability.

The high voltage load switch for a solid insulated overhead line according to the present invention has the following effects.

First, there is an advantage of providing a minimum failure rate and electrical safety and mechanical strength due to the molding protection of the core component to be built therein.

Second, there is an advantage of ensuring the lifetime by eliminating the breakdown by the complete sealing and insulation of the live parts.

Third, there is an advantage that the electrical and mechanical separation of the inside, outside is perfect, ensuring the reliability of the product.

Fourth, the compact structure ensures sufficient mechanical strength not only in compactness but also in volume reduction.

Accordingly, the present invention forms the outer polymer insulating housing in a state where the vacuum interrupter is accommodated in the polymer insulating tube and the composite reinforced insulating tube, thereby preventing the product defect rate due to the molding protection as much as possible, and improving the electrical and mechanical properties. It is provided with a sealing structure that can prevent the dielectric breakdown by the perfect sealing of the connection point (charge part) of the vacuum interrupter, and to make the electrical insulation distance of the sealed space part of the charging part as short as possible, thereby making it possible to compact the size of the insulating housing.

Hereinafter, with reference to the accompanying drawings, the configuration and operation of the present invention for achieving the above object are as follows.

1 to 3 show a high voltage load switch assembly for a solid insulated overhead line of the present invention.

The high voltage load switch for a solid insulated overhead line includes an outer insulating housing 1 largely formed of a polymer, a vacuum interrupter 3 bound by insert molding inside the polymer insulating housing, and a vacuum interrupter. It has the component of the insulated rod 10 connected with 100.

The insulating housing 1 is integrally formed with first and second bushings 24 and 25 on the left and right sides facing each other.

This configuration of the present invention will be described in detail.

That is, according to the present invention, the insulating housing 1 formed of polymer and the first bushing conductor 24 and the second bushing conductor 23 integrally formed by inserting the first bushing conductor 22 on the left and right sides of the insulating housing are provided. And a second bushing 25 which is inserted and integrally formed, and is vertically inserted into the center of the insulating housing, and the upper fixed electrode 26, the first bushing conductor 22, the lower movable electrode 27 and the second bushing A vacuum interrupter 3 in which the conductor 23 is connected to each of the first and second auxiliary conductors 14 and 15 and insert-coupled thereto, and an insulating rod 10 of the processing electrode 27 and the manipulator 100 of the vacuum interrupter. It is configured to include a closed space (A) for sealing the filling part between the).

In this case, the vacuum interrupter 3 is inserted into the insulating housing 1 in a state in which the vacuum interrupter 3 is doublely wrapped by the polymer insulating tube 4 and the composite material reinforced insulating tube 2.

The vacuum interrupter (3) is isolated from the inside of the insulating housing (1) inside the high-strength composite reinforced insulation tube (2) to ensure mechanical strength against external impact, and as a means for further reinforcing the The vacuum interrupter 3 is accommodated and installed in the composite reinforced insulating tube 2 in a state surrounded by a polymer insulated tube 4 on the outside.

In other words, the vacuum interrupter 3 fills the space between the outside and the inside of the composite reinforced insulating tube 2 by filling the polymer insulated tube 4 from the mechanical interruption caused by the opening and closing operation. It provides a function to protect the outside.

The upper part of the vacuum interrupter 3 is bound by the fixed connecting plate 6 fitted into the upper inner circumferential surface of the composite reinforced insulating tube 2, and the lower part of the vacuum interrupter 3 is supported and fixed to the fixed terminal connecting block 5. The electrical contact is kept safe during opening and closing.

Moreover, the electrical isolation of the polymer insulation housing 1 on the outside and the high voltage portion (vacuum interrupter) on the inside as well as the separation of the mechanical connection point (charge part) on the inside are made.

In addition, the composite reinforced insulating tube (2) is extended to the side of the manipulator 100 for providing the opening and closing operation of the vacuum interrupter (3) is surrounded by an insulating housing protrusion 34, the insulating rod 10 therein The sealed space portion A is sealed so as to insulate the charging portion of the pores.

As shown in detail in FIGS. 4 and 5, the fixed terminal connection block 5 penetrates the center hole 5-1 so that the lower movable electrode 27 of the vacuum interrupter 3 is coupled therethrough.

At this time, the movable connecting terminal 7 is fitted to the movable electrode 27 at a lower end thereof, and the movable connecting terminal 7 is coupled to each other by the fixing bolt 31, and the movable connecting terminal 7 has a multi contact ring 8 on the upper outer circumferential surface thereof. It is fitted in the coupling to maintain the connection state during the lifting operation on the inner peripheral surface of the fixed terminal connection block (5).

In addition, the fixed terminal connection block 5 is connected to the closed space (A) and the gas passage (5-2) having a threaded portion in the inner peripheral surface of the front end penetrates, the connection to the gas passage (5-2) Fixed connection block having a screw hole (13-2) by the screw projection (13-1) is processed in the front end through the through hole on one side of the composite material reinforced insulating tube (2) in the gas passage (5-2) 13 is assembled, and the lower end of the second auxiliary conductor 15 is fastened by the fixing bolt 30 to the connection screw hole (13-2).

Accordingly, the load (high pressure) transmitted through the first bushing conductor 22 of the first bushing 24 is transmitted to the fixed electrode 26 of the vacuum interrupter 3 connected to the first auxiliary conductor 14. The fixed terminal connection block receives the load transmitted to the movable electrode 27 connected to the fixed electrode 26 by the operation of the manipulator 100 through the multi contact ring 8 of the movable connection terminal 7. (5) The load is connected to the second bushing 25 via the second bushing conductor 23 connected to the second auxiliary conductor 15 via the fixed connection block 13.

The movable electrode 27 is connected to the fixed terminal connecting block 5 and the movable connecting terminal 7 assembled at the bottom, and the movable connecting terminal is connected to the insulating rod 10 connecting to the manipulator 100. It is.

As shown in FIG. 5, the connection structure of the insulating rod 10 includes a support ring closely attached to the lower portion of the movable connection terminal 7 to the upper connection rod 9 coupled to the lock pin 9-3. 9-2) and the elastic fixing ring 12, one side of which is pushed on one side of the fitting groove 7-1, which is open, is caught by the coupling groove 9-1 and at the same time the fitting groove 7-1. Inward) is connected by compression binding with outward force.

The lower portion of the insulating rod 10 is connected to the manipulator 100 by a lower connection rod 11.

Opening and closing of the movable electrode 27 is performed by the operation of the manipulator 100 so that the insulating rod 10 moves up and down, so that the movable connection terminal 7 moves synchronously to the movable electrode 27 of the vacuum interrupter 3. ) Is attached to the fixed electrode 26 to maintain the electrical opening and closing state.

The vacuum interrupter 3, the movable connection terminal 7 and the fixed terminal connection block 5 are fixed as the surface is completely connected by the multi-contact ring 8 as described above. A connection state is always maintained even when the movable connection terminal 7 moves up and down the center hole 5-1 of the terminal connection block 5.

At this time, the fixed terminal connecting block (5) supports the vacuum interrupter (3) in a fixed state inside the composite reinforcement insulating tube (2), and fixes the movable connecting terminal (7) to a fixed bolt (31). By coupling with the movable electrode 27 of the vacuum interrupter 3, the vacuum interrupter 3 is not moved during the opening and closing operation by the insulating rod 10 inside the polymer insulating housing 1.

In addition, the insulating rod 10 is the upper connection rod 9 is fixed to the upper portion in the sealed space (A) formed inside the composite reinforced reinforced tube (2) by the elastic fixing ring 12 to the movable connection Since it is firmly bound to the terminal 7, it is possible to safely transmit the operating force of the manipulator 100 to the vacuum interrupter (3).

The airtight space portion A may include a conductive shielding film 19 which seals the inner circumferential surface of the composite reinforced insulating tube 2 and the outer circumference of the insulating rod 10, and an insulating support film 20 which prevents the conductive shielding film from expanding. It is sealed by the double diaphragm which is assembled sequentially, and the insulating gas N is filled.

The insulator gas N is preferably environmentally friendly nitrogen.

The airtight space portion (A) is insulated while preventing the expansion of the conductive barrier film 19 and the conductive barrier film that seals the inner circumferential surface of the composite reinforced insulating tube 2 and the outer circumference of the insulating rod 10 of the manipulator 100. It is sealed by the double diaphragm of the insulating support film 20 to provide.

The conductive barrier film 19 prevents breakdown due to voltage concentration due to a high voltage (load) applied to the sealed space part A, and the insulating support film 20 is thickly formed to provide a full sealing force of the charging part. And combined.

In order to maximize sealing of the insulating support film 20 with the insulating rod 10, the protruding film 20a is formed to enclose the longitudinal outer circumferential surface of the insulating rod 10.

The sealed space A sealed in this way is filled with an insulating gas N to improve the insulating performance.

The insulator gas (N) is introduced through the connection screw hole (13-2) of the fixed connection block 13, the gas of the fixed terminal connection block (5) in communication with the connection screw hole (13-2) It is filled through the sealed space A through the passage 5-2.

In this way, the insulator gas (N) is sealed by the fixing bolt 30 for fastening the second auxiliary conductor 15 to the connection screw hole (13-2).

 The insulating gas N charged in the sealed space A is primarily insulated from the voltage and current flowing through the fixed terminal connection block 5, the movable connection terminal 7, and the charging part of the insulating rod 10. It not only disperses the electrical stress concentrated in the flexible conductive barrier film 19, but also keeps the interior dry and reduces the possibility of dielectric breakdown due to flashover.

The double diaphragm of the conductive barrier film 19 and the insulating support film 20 is formed in a circumferential corrugation shape around the insulating rod 10 to have elastic force inward and outward, and an outer peripheral surface of the insulating rod 10. And mechanically and chemically tightly coupled to the inner peripheral surface of the composite material reinforced insulating tube (2) serves to maintain the mechanical sealing and electrical insulation of the sealed space (A).

In the present invention, the upper and lower charging parts of the vacuum interrupter 3 form the polymer insulating housing 1 in a state in which the semiconductive rubbers 50 and 51 are molded for the purpose of preventing insulation breakdown by partial discharge. do.

That is, the upper portion of the vacuum interrupter 3, as shown in Figure 6, the fixed connecting plate 6 and the first auxiliary conductor 14 fitted into the upper inner peripheral surface of the composite material reinforced insulating tube (2). The semiconducting layer rubber 50 is formed at a predetermined thickness so as to block partial discharge of the connection point (charge part) between the fixing bolt 29 to be fastened and the upper fixing electrode 26 and the first auxiliary conductor 14. Molded insulating housing (1),

The lower portion of the vacuum interrupter 3 is located in the charging section between the movable electrode 27, the fixed terminal connection block 5, the movable connection terminal 7, the upper connection rod 9, as shown in FIG. The insulating housing 1 is molded on the outer circumferential surface of the composite reinforced insulating tube 2 and the outer circumferential surface of the fixed connection block 13 in a state in which the semiconducting layer rubber 51 is formed to have a predetermined thickness to block partial discharge.

After forming the semiconducting layer rubbers 50 and 51, the insulating thread holes 13-2 of the fixed connection block 13 and the gas passage 5-2 of the fixed terminal connection block 5 connected thereto are insulated from each other. The gas (N) is charged, the fixing bolt 30 is tightened to the connection screw hole 13-2, the second auxiliary conductor 15 is sealed, and the polymer insulating housing 1 is molded. .

In addition, the insulating housing 1 is a flange 35 is formed in close contact with the metal box of the manipulator 100, the bolt 18 is inserted into the connection surface thereof, the O-ring groove is formed to form an O-ring (O / R) This is combined.

That is, the flange 35 of the insulating housing 1 is fastened by the upper metal box upper part of the manipulator 100 and the bolt 18 and sealed with the metal box of the manipulator 100 by applying an O-ring (O / R). Keep it.

In addition, the polymer insulating housing 1 surrounds the composite reinforcement insulating tube 2 and inserts the insulating housing protrusion 34 protruding from the bottom into the manipulator 100 metal box, thereby protruding the outside of the insulating housing 1. By minimizing the size, the installation space can be used efficiently, and at the same time, the opening and closing work can be performed stably by lowering the center of gravity.

The polymer insulation housing 1 includes a current sensor 16 and a first voltage sensor 17a in the first bushing 24 and a second voltage sensor 17b in the second bushing to measure internal current and voltage. ) Is connected to the insert molding, and the cable passages 33 and 32a and 32b through which the cables connecting the current sensor 16 and the first and second voltage sensors 17a and 17b pass are formed to the cable. It is connected to the control circuit, and it is possible to perform current and voltage detection at all times.

1 is a perspective view showing the appearance of the present invention.

2 is an exploded perspective view showing a constituent member of the present invention.

3 is an exploded cross-sectional view showing a constituent member of the present invention.

Figure 4 is a longitudinal sectional view showing an installation state of the present invention.

5 is a cross-sectional view of the insulating housing of the present invention omitted.

Figure 6 is an exploded perspective view of some excerpts of the present invention.

7 is a cross-sectional view of the main portion of the present invention.

8 and 9 are enlarged views of some excerpts of FIG. 7.

** Explanation of symbols for main parts of drawings **

1: polymer insulation housing 2: composite reinforced insulation tube

3: vacuum interrupter 4: polymer insulated tube

5: Fixed terminal connection block 6: Fixed connection plate

7: Movable connection terminal 8: Multi contact ring

9: upper connection rod 10: insulation rod

26: fixed electrode 27: movable electrode

A: Enclosed space N: Insulated gas

Claims (12)

An insulating housing (1) formed of a polymer and a first bushing (24) and a second bushing conductor (23) integrally formed by inserting the first bushing conductor (22) into the left and right sides of the insulating housing are inserted and integrally formed. The second bushing 25 and the upper bushing electrode 26, the first bushing conductor 22, the lower movable electrode 27 and the second bushing conductor 23 are inserted in the vertical direction at the center of the insulating housing. A vacuum interrupter 3 connected to each of the first and second auxiliary conductors 14 and 15 and insert-coupled therein is sealed, and a charging part between the processing electrode 27 of the vacuum interrupter and the insulating rod 10 of the manipulator 100 is sealed. Insulated load breaker for overhead lines having a closed space (A) to The vacuum interrupter 3 is inserted and coupled to the insulating housing in a state of being double wrapped by the polymer insulating tube 4 and the composite material-reinforced insulating tube 2, and the inside of the polymer insulating housing 1 and the inside A high voltage load switch for a solid insulated overhead line, comprising electrical separation from a high voltage part applied to a vacuum interrupter and mechanical separation of a connection point. The method of claim 1, The composite material reinforced insulating tube 2 extends on the side of the manipulator 100 and is surrounded by an insulating housing protrusion 34, and sealed space portion A sealed to insulate a charging part with the insulating rod 10 therein. High voltage load switchgear for solid insulated overhead line, characterized in that the configuration. The method of claim 1, The lower movable electrode 27 of the vacuum interrupter 3 passes through the central hole 5-1 of the fixed terminal connecting block 5 and the movable connecting terminal 7 fitted at the lower end thereof is fixed to the fixed bolt 31. By being coupled to each other, the movable connection terminal (7) by inserting the multi-contact ring (8) on the upper outer peripheral surface and coupled so that the connection state according to the lifting operation on the inner peripheral surface of the fixed terminal connection block (5) continuously maintained High voltage load switchgear for solid insulated overhead line, characterized in that the configuration. The method of claim 1, The insulating rod 10 is coupled to the support ring (9-2) in close contact with the lower portion of the movable connecting terminal (7) to the upper connection rod (9) coupled to the lock pin (9-3), one side is open The elastic fixing ring 12 forcibly fitted at one side of the fitting groove 7-1 is engaged with the coupling groove 9-1, and is pressed and bound with an outward elastic force inside the fitting groove 7-1. High voltage load switchgear for solid insulated overhead line, characterized in that the configuration. The method of claim 2, The sealed space A may include a conductive shielding film 19 for hermetically sealing an inner circumferential surface of the composite reinforced insulating tube 2 and an outer circumference of the insulating rod 10, and an insulating support film 20 for preventing expansion of the conductive shielding film. A high voltage load switch for a solid insulated overhead line, which is sealed by a double diaphragm of the insulating material and is filled with an insulating gas (N). The method of claim 5, The conductive blocking film 19 and the insulating support film 20 are formed in an annular spiral structure, but are mutually bonded to each other, the insulating support film 20 is a protruding film 20a to cover and seal the outer peripheral surface of the insulating rod 10 long High voltage load switchgear for solid insulated overhead line, characterized in that molded. The method according to claim 2 or 3, The fixed terminal connection block (5) is connected to the closed space (A) through the gas passage (5-2) having a screw portion in the inner peripheral surface of the front end through the connection screw hole communicating with the gas passage (5-2) (13-2) having a fixed connection block (13-1) by a screw projection (13-1) in the gas passage (5-2) is processed in the front end through the through-hole of the composite material reinforced insulation tube (2) ) Is assembled, and the lower end of the second auxiliary conductor 15 to the connection screw hole (13-2) is fastened by the fixing bolt 30, characterized in that the high voltage load switch for solid insulation overhead line. The method of claim 7, wherein The sealed space A is filled with the insulating gas N through the gas passage 5-2 of the fixed terminal connection block 5 and fixed to the second auxiliary conductor 15. 30) High voltage load switchgear for solid insulated overhead lines, characterized by being sealed by 30). The method of claim 8, The insulated gas (N) is a high voltage load switch for solid insulated overhead line, characterized in that environmentally friendly nitrogen. The method of claim 1, The upper portion of the vacuum interrupter (3) is flowed by a fixing bolt (29) for fastening the fixed connecting plate 6 and the first auxiliary conductor 14 fitted into the upper inner peripheral surface of the composite reinforced insulating tube (2). The insulating housing is fixed in a state where a semiconductive layer rubber 50 is fixed to a predetermined thickness and blocks partial discharge of a connection point (charge unit) between the upper fixed electrode 26 and the first auxiliary conductor 14. A high voltage load switch for a solid insulated overhead line, characterized in that 1) is molded. The method according to any one of claims 1 to 5, The outer circumferential surface of the composite reinforced insulating tube 2 located in the charging section between the lower movable electrode 27, the fixed terminal connecting block 5, the movable connecting terminal 7 and the upper connecting rod 9 of the vacuum interrupter 3. And, on the outer peripheral surface of the fixed connection block 13, the high voltage load for solid insulated overhead line, characterized in that the insulating housing 1 is molded in a state in which the semi-conducting layer rubber 51 is molded to a certain thickness to block partial discharge. switch. The method of claim 1, The insulating housing 1 is a flange 35 for connecting to the metal box of the manipulator 100 is formed, the connecting surface is formed by the orifice through the O-ring (8) is assembled and sealed, characterized in that High voltage load switchgear for solid insulated overhead lines.

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