KR101617385B1 - Apparatus for improving stability of electric power distribution line - Google Patents

Abstract

The distribution line structure comprises: a mounting fixture; a fixing and supporting fixture; an operating and supporting fixture; a fixing and connecting fixture; an operating and connecting fixture; a fixing contact point; and an operating contact point. The present invention can make the operating and supporting fixture, the operating and connecting fixture, and the operating contact point move forward and upward at an angle of 45 degrees or move backward and downward at an angle of 45 degrees by an operation driving means to support in a stable way a lead-in wire inserted from the entrance side of a power cable tunnel and a plurality of power lines placed in the tunnel and to improve stability of distribution by connecting the lead-in wire and the plurality of power lines in a stable way. In addition, the present invention can firmly support and connect the lead-in wire and the plurality of power lines with one touch, make it possible to rapidly and conveniently support and connect the lead-in wire and power lines, and improve stability of distribution.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric power distribution line,

More particularly, the present invention relates to a power line structure that improves the stability of power distribution, and more particularly, to a power line structure that stably supports a lead line drawn from the entrance side of a power section tunnel and a plurality of power distribution lines disposed inside the tunnel, It is possible to improve the stability of power distribution by stably connecting a plurality of power distribution lines, and it is possible to firmly support and connect one lead line and a plurality of power distribution lines by one-touch type by opening and closing drive means, And a distribution line structure in which stability of power distribution so as to be connected can be improved.

Generally, in order to supply electric power to electric power customers in urban areas, processed electric power transmission and distribution facilities have been widely used in which electric pole is installed at regular intervals on the road side and electric power transmission and distribution lines are installed thereon using insulation and insulators.

However, these processing and transmission facilities have a problem in that there is a risk of short-circuiting or short-circuiting due to intricate intertwining of processing and transmission lines, problems such as vulnerability to typhoons and rainfall, and deterioration of urban aesthetics.

In Korea, for the first time in 1973, the underground project of the transmission and distribution ship was started, and the installation of the processing and transmission facilities was technically impossible and the maintenance was difficult. In the area where the service line was concentrated, the substation was located near the overpass, overpass, highway and railroad. Location, high load density, and high-rise building to secure the supply capacity. In areas where it is technically difficult to construct a multi-line system, support business expenses, and work in cooperation with administrative offices of local residents, etc. When constructing a substation or adding substation main transformers to existing substations, Has installed a power line or a battery line in order to take out the power distribution line of the power transmission line.

In recent years, there have been a lot of restrictions on the electrical equipment technical standards and other related laws (roads, urban planning, construction, river, park, fire prevention, etc.) , It is difficult to install processing and transmission facilities due to the large number of lines such as power stations and substation outlets, which are deemed to be appropriate to be supplied to underground lines by administrative offices or customers' request, The underground project is under way for bridges, other facilities, security, and technically underground facilities.

Overseas transmission and distribution lines have underground penetration rates of 100% in London and Paris, and underground transmission lines are being actively promoted all over the world.

Underground transmission and distribution facilities are divided into direct sales type, channel type and electric power type according to installation type.

The direct sales method is to install a cable in the through for the protection of the distribution cable, fill the sand between the trough and the cable, and then cover the cover. Depth of burial shall be more than 1 ~ 2m in places subject to heavy pressure of vehicles and 60cm in other places in accordance with Electrical Equipment Technical Standard, but in case of other underground burials, depth shall be adjusted considering the relation with other underground burials. .

The duct type is a system in which a duct and a manhole are installed, and a cable is drawn into a pipeline so that a cable can be connected in a manhole. It is applied to places with heavy traffic in the city where roads can not be kept excavated for a long time like the direct sales type. In consideration of the problems of re-excavation of the places where the future expansion is expected, the pipelines and manholes are installed in advance.

Power outdated is a way to build a tunnel that is large enough for the worker to pass through in the ground, and a support (shelf) is installed on both sides of the tunnel to support the cable on the support (shelf). It is also referred to as a cul-de-sac or a cul-de-sac. The outdated power is advantageous in the case where the number of cables is more than 20 or in a region where a multi-line is required such as a substation withdrawal part, and when using a cable exceeding an ultra-high voltage, convenience of maintenance, maintenance and inspection and heat dissipation are widely used.

In such power outdated power distribution lines, a plurality of incoming power leads corresponding to the number of receptacles are to be connected to the lead-in line drawn from the entrance side of the power section tunnel.

As a prior art related to this, Korean Unexamined Patent Publication No. 10-1380324 (Registered on Mar. 26, 2014) "Underground distribution line connection mechanism for easy installation" Discloses a technique of connecting both power distribution lines including a cap, a wire connector, a wire fixture and a corrugated tube at a ratio of 1: 1.

However, in the prior art 1, when a plurality of power distribution lines are wired in a power slot tunnel, a number of power lines must be secured as much as the number of power distribution lines. Normally, at the entrance side of the power slot tunnels, There is a problem that the distribution to a customer such as a large-sized apartment can not be stably accomplished.

In general, when a customer is divided into a plurality of apartments as in the case of a large apartment, a lead-in line is drawn in the entrance of the power-tunnel tunnel, and a distribution line connected to the switchboard is connected to the one lead- (Distribution line) to one lead-in line (distribution line), there is a problem in that it is unsuitable in terms of stability of distribution in connecting multiple distribution boards to one lead-in line like a large apartment.

Therefore, it is required to develop a technique for stably connecting a plurality of distribution lines to one drop line and capable of stably supporting the drop line and the distribution line, thereby improving the stability of distribution.

Korean Registered Patent No. 10-1380324 (Registered on March 26, 2014) "Connection Mechanism of Underground Distribution Line for Easy Installation"

SUMMARY OF THE INVENTION It is therefore an object of the present invention to improve the stability of distribution by stably supporting one lead-in line at the entrance side of the power tunnel and a plurality of distribution lines that are wired in the tunnel and stably connecting the lead- And the one lead wire and the plurality of power distribution lines can be firmly supported and connected by the one-touch type by the opening and closing drive means, so that the stability of the power distribution can be quickly and easily supported and connected at the same time. .

According to an aspect of the present invention, there is provided a method of inspecting a tunnel, the method comprising: inserting a penetration line horizontally penetrating a power tunnel wall, entering a power tunnel tunnel, bending a front end downward, A plurality of power distribution lines which are horizontally wired inside the power slot tunnel and whose rear ends are bent upwards so that the top portion of the insulation coating is peeled so that the conductor is exposed, A mounting table having a horizontal mounting base bent forward and bent horizontally at a lower end of the vertical mounting base; A stationary support having a vertical fixed support fixed to a vertical mount of the mounting stand and a horizontal fixed support horizontally extending forward from a lower end of the vertical fixed support; A vertical movable support disposed at a position spaced forward from the vertical fixed support; a movable support having a horizontally movable support bent forward at a lower end of the vertical movable support; A vertical fixed connection base fixed to the front surface of the vertical fixed support and a horizontal fixed connection base bent forward and bent at a lower end of the vertical fixed connection base; A movable connection base made of an insulating material having a vertically movable connection base foldable on the front surface of the vertical fixed connection base and a horizontally movable connection base bent forward and bent forward at a lower end of the vertical movable connection base; A lower end rear fixed connection portion of the lead wire embedded in the front surface of the vertical fixed connection portion and contacting the lower rear half portion of the conductor of the lead wire, and a plurality of fixed portions of the upper end portion of the upper end of the power distribution line integrally formed with the lower end fixed connection portion of the lead- A fixed contact made of a conductive material having a connection part; A lower end front fixed connection portion that is embedded in the rear surface of the vertically movable connection board and is connected to a lower front end portion of a conductor of a lead wire; and a plurality of upper end portions of a plurality of distribution line upper ends that are integrally formed with the lead- A movable contact made of a conductive material having a connection part; Closing and driving means for actuating the movable connecting base and the movable contact in a connected state and a separated state with respect to the fixed connecting base and the fixed contact; Wherein the vertical fixed connection block and the horizontal fixed connection block are formed to be connected to the lead line through hole and include a lower end rear support groove of the lower end of the insulated wire in which the lower end half portion of the insulating coating of the insulated wire is inserted and supported, A plurality of distribution line upper half rear support grooves for inserting and supporting the rear half of the distribution cable and a plurality of distribution line horizontal lower half support grooves for inserting and supporting the insulation plate of the distribution cable into the horizontal lower half support grooves, And a plurality of distribution line horizontal upper half support grooves for inserting and supporting the distribution line horizontal upper half portion are formed on the upper half of the distribution line upper half support grooves And the fixed contact is provided with an inlet Wherein the movable contact is embedded between a lower half rear support groove of the lower end and a rear half support groove of the upper end of the power distribution line, And a connecting bracket connecting the upper ends of the operating rods and the left and right ends of the movable support rods, and a connecting bracket for connecting the left and right ends of the operating rods to the left and right ends of the movable rods, The present invention provides a distribution line structure improved in stability of distribution.

According to the power distribution line structure of the present invention, the stability of power distribution is improved. The power supply line structure includes the mounting base, the fixed support, the movable support, the fixed connection, the movable connection, the fixed contact and the movable contact. And forwardly and upwardly by 45 degrees upward or backward and 45 degrees downwards by the opening and closing drive means, thereby stably supporting one lead-in line drawn from the entrance side of the power slot tunnel and a plurality of distribution lines arranged in the tunnel, In addition, the stability of distribution can be improved by stably connecting the lead line and the plurality of distribution lines, and it is possible to firmly support and connect one lead line and a plurality of distribution lines by the opening and closing drive means, It is possible to improve the stability of power distribution so that it can be easily supported and connected.

1 to 8 show a preferred embodiment of a distribution line structure in which the stability of power distribution according to the present invention is improved,
FIG. 1 and FIG. 2 are exploded perspective views of a distribution line structure improved in stability of power distribution according to the present invention in right-front and left-
3 is a perspective view showing a state in which a lead line and a power distribution line are separated by a power distribution line structure having improved stability of power distribution according to the present invention,
4 is a perspective view showing a state in which a lead line and a power distribution line are connected by a power distribution line structure having improved stability of power distribution according to the present invention,
FIG. 5 is a partially cutaway perspective view showing a state in which a lead line and a power distribution line are separated by a power distribution line structure having improved stability of power distribution according to the present invention,
6 is a partially cutaway perspective view showing a state in which a lead line and a power distribution line are connected by a power distribution line structure having improved stability of power distribution according to the present invention,
7 is a longitudinal sectional view showing a state in which a lead line and a power distribution line are separated by a power distribution line structure having improved stability of power distribution according to the present invention,
8 is a longitudinal sectional view showing a state in which a lead line and a power distribution line are connected by a power distribution line structure improved in the stability of distribution of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a distribution line structure in which the stability of power distribution according to the present invention is improved will be described in detail with reference to the preferred embodiments illustrated in the accompanying drawings.

According to the present invention, stability of a distribution line can be improved by stably supporting a lead line drawn from the outside of a power tunnel and a plurality of distribution lines wired in the tunnel, and stably connecting the lead line.

In the following description, the inside of the power tunnel is described as "inside", "front", and "front".

Also, bolt fastening holes (screw holes) in which various bolts are inserted and fastening bolts are shown in the figure, and the reference numerals and detailed explanations are omitted.

The distribution line structure improving the stability of power distribution according to the present embodiment horizontally penetrates the power tunnel wall 30 to enter the inside of the power tunnel and the front end thereof is bent downward and the lower end portion of the insulation coating 12 is peeled A lead wire 10 which is horizontally wired inside the power tunnel tunnel and whose rear end is bent upward and peeling the upper portion of the insulating sheath 22 to expose the conductor 21; And is suitable for connecting the power distribution line 20.

The distribution line structure having improved stability of power distribution according to the present embodiment includes a vertical mounting base 110 fixed to a power slot tunnel wall 30 and a vertical mounting base 110 bent forwardly at a lower end of the vertical mounting base 110, A mounting base 100 having a horizontal mounting base 120 to be mounted; A vertical fixed support 210 fixed to the vertical mount 110 of the mount 100 and a horizontal fixed support 220 bent forward and bent at the lower end of the vertical fixed support 210, A fixed support (200);

A vertical movable support 310 disposed at a position spaced forward from the vertical fixed support 210 and a horizontal movable support 320 bent forward and bent at a lower end of the vertical movable support 310, A movable support 300; A vertical fixed connection bar 410 fixed to the front of the vertical fixed support 210 and a horizontal fixed connection bar 420 bent forward and bent at the lower end of the vertical fixed connection bar 410 A connection board 400; A vertical movable connection base 510 which can be folded on the front surface of the vertical fixed connection base 410 and a horizontally movable connection base 520 which is bent forward and bent horizontally at a lower end of the vertical movable connection base 510 A movable connection base 500 of an insulating material; A bottom connecting portion 610 of the lower end of the lead wire embedded in the front surface of the vertical fixed connection terminal 410 and contacting the lower end portion of the lower end of the conductor 13 of the lead wire 10, A stationary contact 600 made of a conductive material and having a plurality of (11 in the figure) power line top rear half fixed connection portions 620 connected to the rear half of the upper end of the conductor 21 of the power distribution line 20; A lower front end fixed connection portion 710 embedded in the rear surface of the vertically movable connection base 510 and connected to a lower front end portion of the conductor 13 of the lead wire 10 and a lower front end fixed connection portion 710 integrally formed with the lower front end movable connection portion 710 A movable contact 700 made of a conductive material and having a plurality of (11 in the drawings) upper-end power-line-front movable connection portions 720 connected to the upper half of the upper end of the conductor 21 of the power distribution line 20; Closing and driving means (800) for actuating the movable connection pedestal (500) and the movable contact (700) in a connected state and a separated state with respect to the fixed contact pad (400) and the fixed contact (600); .

The mounting base 100 includes a plurality of (four in the figure) anchor bolts B1 buried in the power tunnel wall body 30 and protruding forward and passing through the vertical mounting base 110 and a nut N1 And is fixed to the front surface of the power tunnel wall body 30 by a bolt.

The lead wires 10 are provided with lead wire through holes 31, 111, 211 and 411 perforated in the power tunnel wall 30, the vertical mount 110, the vertical fixed support 210, Through the tunnel.

An insulating bushing 32 made of an insulating rubber material is inserted between the lead line 10 and the lead line through holes 31, 111 and 211.

The supporting table 200 can be fixedly mounted on the mounting table 100 by fastening a plurality of bolts B2 passing through the vertical fixing support 210 to the vertical mounting table 110 . A bolt through hole through which the bolt B2 passes is formed in the vertical fixed support 210 and a screw hole through which the bolt B2 is fastened to the vertical mounting table 110.

The bolt B2 is a hexagonal wrench bolt that can be turned by a hexagonal wrench, and the screw through hole formed in the vertical support supporter 210 is formed such that the head of the hexagonal wrench bolt protrudes from the front surface of the vertical fixed support 210 It is preferable to use a counter bore type.

The fixed connection terminal 400 and the movable connection terminal 500 are formed of an insulating material such as an insulating rubber or an insulating synthetic resin.

The lower fixed end connecting portion 410 and the horizontal fixed connecting portion 420 are provided with a lower half rear support groove 412 for inserting and supporting the lower half portion of the insulating cover 12 of the lead wire 10, A plurality of (11 in the figure) 11 power distribution line upper half rear support grooves 413 for inserting and supporting the top rear half of the cover 22 and a plurality of Horizontal lower half support grooves 421 are formed.

The lower half rear support groove 412 of the lead line is connected to the lead line through hole 411.

The front and rear movable connection pedestals 510 and 520 are provided with a lead front lower end support groove 511 in which the lower front half portion of the insulation cover 12 of the lead wire 10 is inserted and insulated, (11 in the figure) power distribution line upper half support grooves 512 and a plurality of power distribution line horizontal upper half support grooves 512 in which the upper half of the cover 22 is inserted and supported, 521 are formed.

The stationary contact point 600 is embedded between a lower half support groove 412 at the lower end of the leading line formed in the vertical fixed connection block 410 and a support groove 413 at the upper half of the distribution line upper end, And is embedded between the lower end first half support groove 511 formed on the base 510 and the power line top upper half support groove 512.

1 and 2, reference numerals 640 and 740 denote fixed contact buried grooves and movable contact buried grooves in which the fixed contact 600 and the movable contact 700 are buried, respectively.

The lower half second fixed connection portion 610 and the upper half portion of the power line upper end fixed connection portion 620 constituting the fixed contact 600 are integrally connected to each other by the connection piece 630, The stationary connecting portion 710 and the power line upper half front movable connecting portion 720 are integrally formed by the connecting piece 730. The stationary contact 600 and the movable contact 700 are formed by press- .

The opening and closing drive means 800 includes a linear actuator 810 having lower ends fixed to the right and left sides of the mounting table 100 and having a working rod 820 installed at an angle of 45 degrees forward and upward, And a connection bracket 830 connecting the upper ends of the operation rods 820 and the left and right ends of the movable support 300.

The linear actuator 810 uses a solenoid in which the operating rod 820 is retracted by a spring (not shown) built therein when the operating rod 820 is advanced when power is applied and the power is shut off, An operating screw having a motor shaft provided with a female screw portion on its inner circumferential surface, and an operating screw having a male screw portion screwed to the female screw portion of the motor shaft.

The linear actuator 810 can be fixed to the mount 100 by using a mounting bracket 840.

A guide rail (not shown) may be installed between the mounting table 100 and the movable support 300 to guide the movable support 300 toward the upper surface and the lower surface in the direction of 45 degrees.

Hereinafter, a process of connecting and disconnecting a lead line and a power line by a power line structure having improved stability of power distribution of the present invention will be described.

When the lead wire 10 and the power distribution line 20 are installed, power is applied to the linear actuator 810 constituting the opening and closing drive means 800 to operate The rod 820 advances forward and upward at an angle of 45 degrees so that the movable support 300 and the movable contact 500 and the movable contact 700 advance forward and upward at an angle of 45 degrees, And between the stand 400 and the movable contact 500 and between the stationary contact 600 and the movable contact 700. [

The lead wire 10 is drawn through the lead wire through holes 31, 111, 211 and 411 so that the lower end of the insulating sheath 12 of the lead wire 10 is inserted and supported in the lower half back support groove 412 of the lead wire, The lower end of the conductor 11 of the fixed contact 600 is inserted and brought into contact with the lower half portion fixed connection portion 610 of the lower end of the fixed contact 600 and the horizontal portion of the distribution line 20 is inserted into the distribution line horizontal lower half support groove 421 So that the vertical part of the power distribution line 20 is inserted and supported in the upper rear half support groove 413 of the power distribution line and the conductor 21 of the power distribution line 20 is connected to the fixed connection part 620 at the upper end of the power distribution line upper half of the fixed contact 600 (See Figs. 2, 5, and 7).

In this state, the power source of the linear actuator 810 is cut off and the operating rod 820 is retracted rearwardly and downwardly by 45 degrees by a spring (not shown) incorporated in the linear actuator 810, The support base 300, the movable contact 500 and the movable contact 700 are retracted rearward and downward at an angle of 45 degrees so that the movable contact 700 contacts the conductor 11 of the lead wire 10 and the conductor 21).

The lower end of the pull line 10 is inserted between the lower half rear support groove 412 of the pull line and the lower half first support groove 511 of the pull line and the conductor 11 of the pull line 10 is inserted into the lower half of the pull line of the fixed contact 600 The horizontal portion of the power distribution line 20 is inserted between the power distribution line horizontal lower half support groove 421 and the power distribution line horizontal upper half support grooves 521 and between the power distribution line horizontal lower half support grooves 421 and the power distribution line horizontal upper half support grooves 521 And the upper end of the power distribution line 20 is inserted between the power distribution line upper half rear support groove 413 and the power distribution line upper half support grooves 512. When the movable support table 300 and the movable connection table 500 are connected to the linear actuator 810 are pressed against the fixed support 200 and the fixed connection 400 by the elastic force of the built-in spring of the fixed connection 400 and the movable connection 500, As shown in Fig.

The conductor 11 of the lead wire 10 is inserted between the lower half fixed connection portion 610 of the lead line of the fixed contact 600 and the lead line lower first half movable connection portion 710 and the conductor 21 of the lead wire 20 is fixed When the movable contact 700 is inserted between the fixed contact 620 at the upper end of the distribution line upper end of the contact 600 and the movable contact 720 at the upper end of the distribution line upper front portion 720 by the elastic force of the built-in spring of the linear actuator 810, The conductor 11 of the lead wire 10 and the conductor 21 of the power distribution line 20 are tightly connected to each other (see FIGS. 4, 6 and 8).

As described above, according to the distribution line structure in which the stability of power distribution according to the present invention is improved, the mounting table 100, the fixed support 200, the movable support 300, the fixed connection 400, The stationary contact point 600 and the movable contact point 700. The movable contact point 300 and the movable contact point 500 and the movable contact point 700 are moved forward and upward by 45 degrees by the opening / (10) and a plurality of distribution lines (20) wired in the tunnels are stably supported by moving forward or backward and backward in directions of 45 degrees so as to stably support the incoming line (10) and the incoming line The stability of power distribution can be improved by stably connecting the plurality of distribution lines 20 and the one lead line 10 and the plurality of distribution lines 10 can be solidly supported and connected at the same time by one- So that the lead wire 10 and the power distribution line 20 can be quickly, It is possible to improve the stability of power distribution so that it can be easily supported and connected.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or essential characteristics thereof. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents thereof should be construed as falling within the scope of the present invention.

10: lead wire 11: conductor
12: Insulation cloth 20: Distribution line
21: Conductor 22: Insulation cloth
30: electric power tunnel wall 31: penetration hole
32: Insulation bushing 100: Mounting base
110: vertical mounting table 111: penetration hole
120: Horizontal mounting base 200: Fixing support
210: vertical fixed support 211: penetration through hole
220: horizontal fixed support 300: movable support
310: vertical movement support 320: horizontal movement support
400: fixed connection base 410: vertical fixed connection base
411: Lead wire penetration hole 412: Lower end of the lead wire support groove
413: Distribution line upper half rear support groove 420: Horizontal fixed connection base
421: Distribution line horizontal lower half support groove 500:
510: Vertical movable connection base 511: Lower end first half of the lead line support groove
512: Distribution line upper half support groove 521: Distribution line horizontal upper half support groove
600: Fixed contact point 610: Lower end of the lead wire fixed connection
620: upper half of the distribution line upper fixed connection
630: Connecting piece 640: Fixed contact buried groove
700: Movable contact point 710: Inflow line lower first half movable contact
720: the upper half of the main line of the distribution line
730: connecting piece 740: movable contact buried groove
800: opening / closing drive means 810: linear actuator
820: Working rod 830: Connecting bracket
840: Mounting bracket

Claims (1)

A penetration line 10 penetrating horizontally through the power tunnel wall 30 to enter the power tunnel tunnel and bent downward at the front end thereof and peeling the lower end portion of the insulation sheath 12 to expose the conductor 11, In supporting and connecting a plurality of distribution lines (20) which are horizontally wired in the inner side of a tunnel and whose rear ends are bent upwards so as to peel the upper end of the insulation sheath (22) to expose the conductors (21)
A mounting base 100 having a vertical mounting base 110 fixed to the power tunnel wall 30 and a horizontal mounting base 120 bent forward and bent at a lower end of the vertical mounting base 110, Wow; A vertical fixed support 210 fixed to the vertical mount 110 of the mount 100 and a horizontal fixed support 220 bent forward and bent at the lower end of the vertical fixed support 210, A fixed support (200); A vertical movable support 310 disposed at a position spaced forward from the vertical fixed support 210 and a horizontal movable support 320 bent forward and bent at a lower end of the vertical movable support 310, A movable support 300; A vertical fixed connection pad 410 fixed to the front surface of the vertical fixed support 210 and a horizontal fixed connection pad 420 horizontally extended forward from the lower end of the vertical fixed connection pad 410, A fixed connecting base 400 made of a material; A vertical movable connection base 510 which can be folded on the front surface of the vertical fixed connection base 410 and a horizontally movable connection base 520 which is bent forward and bent horizontally at a lower end of the vertical movable connection base 510 A movable connection base 500 of an insulating material; A bottom connecting portion 610 of the lower end of the lead wire embedded in the front surface of the vertical fixed connection terminal 410 and contacting the lower end portion of the lower end of the conductor 13 of the lead wire 10, A fixed contact 600 made of a conductive material and having a plurality of distribution line upper half rear fixed connection portions 620 connected to a rear half of the upper end of the conductor 21 of the distribution line 20; A lower front end fixed connection portion 710 embedded in the rear surface of the vertically movable connection base 510 and connected to a lower front end portion of the conductor 13 of the lead wire 10 and a lower front end fixed connection portion 710 integrally formed with the lower front end movable connection portion 710 A movable contact 700 made of a conductive material and having a plurality of distribution line upper first movable contacts 720 connected to the upper half of the upper end of the conductor 21 of the distribution line 20; Closing and driving means (800) for actuating the movable connection pedestal (500) and the movable contact (700) in a connected state and a separated state with respect to the fixed contact pad (400) and the fixed contact (600); And,
The upper end of the lower half of the insulated wire 12 is connected to the penetration hole 411 so as to be connected to the vertical fixed connection terminal 410 and the horizontal fixed connection terminal 420, A plurality of distribution line upper half rear support grooves 413 for inserting and supporting the upper rear half of the insulation cover 22 of the distribution line 20 and a horizontal lower half of the insulation cover 12 of the distribution line 20 are inserted and supported A plurality of distribution line horizontal lower half support grooves 421 are formed,
The front and rear movable connection pedestals 510 and 520 are provided with a lead front lower end support groove 511 in which the lower front half portion of the insulation cover 12 of the lead wire 10 is inserted and insulated, A plurality of distribution line upper half support grooves 512 into which the upper half of the upper end of the cover 22 is inserted and a plurality of distribution line horizontal upper half support grooves 521 through which the distribution line horizontal upper half is inserted and supported,
The stationary contact point 600 is embedded between a lower half support groove 412 at the lower end of the leading line formed in the vertical fixed connection block 410 and a support groove 413 at the upper half of the distribution line upper end, End first-half support groove 512 formed in the lower portion 510 of the lead wire,
The opening and closing drive means 800 includes a linear actuator 810 having lower ends fixed to the right and left sides of the mounting table 100 and having a working rod 820 installed at an angle of 45 degrees forward and upward, And a connecting bracket (830) for connecting the upper end of the operating rod (820) and the left and right ends of the movable support base (300).

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