KR102045759B1 - Cable protection equipment for distribution and trasformation of electric energy - Google Patents

Abstract

The present invention relates to a cable protection device for power distribution and substation comprising: a protection case (10); a pair of cable fixing devices (20) slidably movable in the protection case (10) and electrically connected to a cable (L) introduced inside the protection case (10); an elastic body (30) installed in the protection case (10) to elastically support the cable fixing device (20) in one direction; a connector line (40) electrically connecting the cables (L) each other installed respectively in the cable fixing device (20); a line replacement device (50) disconnecting the electrical connection between the cable fixing device (20) and the connector line (40) while electrically connecting the pair of cable fixing devices (20) which is installed in the protection case (10) and has the cable (L) installed so that the connector line (40) can be replaced in the live wire state; a fire detection sensor (60) detecting a fire and outputting a fire detection signal; a control unit (70) receiving the fire detection signal from the fire detection sensor (60) and outputting an operation signal; and a fire extinguisher (80) operated by the control unit (70) and spraying an extinguishing liquid to a fire area to extinguish the fire. According to the embodiment of the present invention, since the fire can be quickly suppressed, the cable can be prevented from being burned out by the fire, thereby minimizing the damage caused by the fire.

Description

Cable protection equipment for distribution and substations {Cable protection equipment for distribution and trasformation of electric energy}

The present invention relates to a cable protection mechanism for power distribution and transformation that can prevent the burnout of the cable through fire suppression quickly in the event of a fire, and can be replaced in the live state without interrupting electricity.

The electricity distributed from the primary substation or the secondary substation is transmitted or distributed to the receiving facility of each customer through the transmission and distribution system consisting of overhead cable and underground cable, and to the low pressure consumer through the special high pressure consumer, the high pressure consumer, and various outdoor transformers. It is used for industrial and home use by transmission and distribution.

Among them, the transmission and distribution method using the underground through the transmission and distribution system composed of underground cables is protected by receiving underground cables in the manhole or power port, and the underground cables are electrically connected to each other via an adapter.

On the other hand, when the cable connected as described above is tensioned by an external force, there is a problem that the electrical connection is released as the connection portion is damaged (broken) by the tensile force.

In order to solve the problem as described above, there is a conventional technology proposed by the Republic of Korea Patent No. 10-1814637, which can be easily and simply electrically connected underground cable, as well as when a tensile force is applied to the underground cable A technology that fundamentally solves the problem of disconnection of underground cables by making it acceptable is disclosed.

However, these prior arts are very vulnerable to fire because there is no means to extinguish fire in the manhole or power port, especially when replacing the connection part that electrically interconnects the underground cable along the underground cable. The replacement work had to be carried out while the electricity was cut off, so residents had to be uncomfortable due to the interruption of the power supply.

1. Republic of Korea Patent No. 10-1814637 (2018.01.03)

The present invention has been made in order to solve the above problems, it is possible to prevent the burnout of the cable through the suppression quickly in the event of a fire, protection of power distribution and substation cable can proceed in the live state without interrupting the electricity The purpose is to provide a mechanism.

The present invention for achieving the above object,

The cables are respectively led through the both ends into the space provided inside, the front is provided with an opening communicating with the inside, the upper surface of the enclosure integrally formed with the nut portion communicating with the interior, the inner space of the both ends of the housing are opposed to each other A protective case made of an insulating material including a guide rail protruding from the cover, a cover for opening and closing the opening of the enclosure, and a locking part installed at the enclosure to control the opening and closing of the cover;

The inner space of the enclosure is spaced apart from each other and is moved along the guide rail, the coupling hole is provided on the upper end of one end, the movable plate of the insulating material provided with an elastic receiving groove on both sides of the other end, and both ends of the enclosure inward A fix terminal fixed to the moving plate via a fastening means so that the drawn cable can be electrically connected, a connector terminal removably inserted into the coupling hole, and a fix terminal coupled to the moving plate via a shaft pin to be rotatable. Rotate terminal to electrically connect the connector terminal, spring to support the rotate terminal in one direction, support to support the spring is installed on the moving plate, and installed on the moving plate to be placed on the top of the fixed terminal Cable fixing device consisting of a guide bracket provided;

An elastic body inserted into the elastic body receiving groove so as to be disposed between the housing and the moving plate to elastically support the moving plate in one direction;

Connector lines at both ends of which are respectively installed at connector terminals of the cable fixing device, for electrically connecting cables respectively installed at the cable fixing device;

It is fastened to the nut part to be able to be lifted, a plurality of handles are formed on the outer circumferential surface of the upper end, there is a lifting bolt formed integrally with the shaft hole which is opened downward, and a connection part rotatably coupled to the shaft hole is installed in the enclosure Lifting mechanism consisting of an insulating block moved up and down by,

A connector pipe made of a conductive material inserted into the insulating block horizontally and integrally formed with the insulating block;

An elastic bar that is inserted through the both ends of the connector pipe and is in contact with the inner surface of the connector pipe is provided at one end of the extension bar and extended from the other end of the extension bar to be inserted into the guide hole of the guide bracket. Conductive material terminal connection member with a terminal connecting rod which is interposed between the part and the fix terminal to electrically connect the fix terminal and the rotate terminal, and rotates the rotate terminal around the shaft pin so that the other end of the rotate terminal and the connector terminal are separated from each other. Line replacement device consisting of;

A fire detection sensor installed in the insulating block to detect heat generated in a fire and output a fire detection signal;

A control unit for receiving a fire detection signal from the fire detection sensor and outputting an operation signal;

And a fire extinguisher equipped with an injection valve that is operated and controlled by an operation signal of the control unit to extinguish the fire by spraying the extinguishing liquid filled therein through the injection valve.

According to the present embodiment, since the fire can be quickly suppressed, the cable can be prevented from being burned out by the fire, thereby minimizing the damage caused by the fire.

In addition, it is possible to prevent the departure of the cable by accommodating it when the tension occurs in the distribution line.

And since the replacement of the connector line can be performed in the live state without shutting off the cable, the operation is very convenient and there is an advantage that a stable electricity supply is possible.

1 is a perspective view of a cable protection mechanism for power distribution and substation according to the present invention.
Figure 2 is a front sectional view of the cable protection mechanism for power distribution and substation according to the present invention.
Figure 3 is a plan sectional view of a cable protection mechanism for power distribution and substation according to the present invention.
Figure 4 is an exploded perspective view of the main part of the cable protection mechanism for power distribution and substation according to the present invention.
Figure 5 is an exploded perspective view showing a separate cable fixing device in the cable protection mechanism for power distribution and substation according to the present invention.
6 is a view showing the correlation between each component in the cable protection mechanism for power distribution and substation according to the present invention.
7 is a view for explaining the operation of the cable protection mechanism for power distribution and substation according to the present invention.
8A and 8B illustrate a process of replacing a connector line using a cable protection mechanism for power distribution and substation according to the present invention.

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

1 is a perspective view of a cable protection mechanism for distribution and substation according to the present invention, FIG. 2 is a front sectional view of a cable protection mechanism for distribution and substation according to the present invention, and FIG. 3 is a cable protection for power distribution and substation according to the present invention. 4 is an exploded perspective view showing main parts of a cable protection mechanism for power distribution and transformation according to the present invention, and FIG. 5 is a view showing a cable fixing device separately from the cable protection mechanism for power distribution and transformation according to the present invention. Figure 6 is an exploded perspective view, Figure 6 is a view showing the correlation between each component in the cable protection mechanism for power distribution and substation according to the present invention.

1 to 5, the cable protection mechanism for power distribution and transformation according to the present invention is a protective case 10 and a pair of cable fixing device 20, elastic body 30, connector line 40, line It is composed of the replacement device 50, the fire detection line 60, the control unit 70 and the fire extinguisher 80, it can be suppressed quickly in the event of a fire to prevent the cable (L) burned out by the fire and In order to accommodate the tension when the cable (L) is generated, it prevents the departure of the cable (L), there is a technical feature that can proceed with the replacement of the connector line 40 in the live state without shutting off electricity.

1 to 3, the protective case 10 is a member made of an insulating material including a housing 11, a guide rail 12, a cover 13, and a locking part 14.

For example, the protective case 10 may be installed in a power distribution box or a manhole installed in a distribution box on the ground or installed in the vicinity of a substation facility or buried in the ground.

In addition, the protective case 10 is a cable fixing device 20 and the elastic body 30, the connector line 40, the line replacement device 50, the fire detection line 60, the control unit 70 Fire extinguisher 80 serves to protect from external forces.

The enclosure 11 is a rectangular box, inside the cable fixing device 20 and the elastic body 30, the connector line 40, the line replacement device 50, the fire detection line 60, the control unit 70 And a space portion for installing the fire extinguisher 80 is provided, the front surface is provided with an opening communicating with the inside, the upper surface is in communication with the inside and the nut portion (11a) formed with a screw tab on the inner peripheral surface is integrally formed.

The guide rails 12 are provided at both inner ends of the enclosure 11 to guide the moving plate 21. More specifically, the guide rails 12 are spaced apart from the bottom surface of the enclosure 11 to protrude to face each other.

The cover 13 is a kind of door, which is rotatably installed in the enclosure 11 via a hinge, and is used for opening and closing the opening of the enclosure 11.

The locking portion 14 is rotatably installed on the front of the housing 11 serves to intercept the opening and closing of the cover (13).

The protective case 10 having the structure as described above, the cable (L) is introduced through both ends, the cable (L) is a pair of cable fixing device 20 and the connector line 40 or a pair The cable fixing device 20 and the line replacement device 50 of the electrically connected.

2 to 5, the pair of cable fixing devices 20 includes a moving plate 21, a fix terminal 22, a connector terminal 23, a rotate terminal 24, a spring 25, It is composed of a support 26 and the guide bracket 27, in the present embodiment is slidably movable in the protective case 10, and is electrically connected to the cable (L) introduced into the protective case 10. .

The moving plate 21 is a block made of an insulating material having a predetermined thickness and is slidably inserted between the bottom surface of the housing 11 and the guide rail 12.

One end of the moving plate 21 is provided with a coupling hole 21a having a stepped interior, and elastic receiving grooves 21b are provided at both sides of the other end.

Here, the connector terminal 23 is inserted into the coupling hole (21a) detachably, and the elastic body (30) is inserted into the elastic receiving groove (21b) to support the moving plate 21 in one direction.

The fix terminal 22 is a block made of a conductive material. In the present embodiment, the fix terminal 22 is disposed on an upper surface of the other end of the moving plate 21, that is, on an upper surface provided with an elastic receiving groove 21b, and fixed by a fastening means (screw bolt). do.

The connector terminal 23 is a member made of a conductive material electrically connected to the connector line 40. In this embodiment, the connector terminal 23 is removably inserted into the coupling hole 21a of the moving plate 21. In particular, a stepped portion 23a extending outward is integrally formed on the outer circumferential surface of the portion inserted into the coupling hole 21a so that the connector terminal 23 is inserted by the stepped portion 23a when inserted into the coupling hole 21a. Insertion depth is limited. In addition, when the outer circumferential surface of the connector terminal 23 is brought into contact with the semicircular groove (see FIG. 5) provided at the other end of the rotate terminal 24, the stepped portion 23a is caught by the lower surface of the rotate terminal 24. The terminal 23 can be restricted from being separated from the coupling hole 21a.

The rotate terminal 24 is a block of a rectangular parallelepiped conductive material. In the present embodiment, the rotate terminal 24 is rotatably installed on the upper surface of the moving plate 21 via a shaft pin P, and the fix terminal 22 and the connector terminal 23 are rotated. ) It acts as a switch to connect or cut off electrical. Here, one end of the rotate terminal 24 is opposed to one surface of the fix terminal 22, and one surface of the other end is provided with a semi-circular groove (see Fig. 5) to face the outer peripheral surface of the connector terminal 23. In particular, funnel-shaped grooves (see FIG. 5) are provided on the surface and the upper surface where the fix terminal 22 and the rotate terminal 24 are opposed to each other, which are terminals of the line replacement device 50 described later. This is to allow the connecting rod 53b to be easily inserted between the fix terminal 22 and the rotate terminal 24.

The spring 25 is a coil spring. In the present embodiment, the spring 25 is disposed on the upper surface of the moving plate 21 so that the other end of the rotator terminal 24 and the connector terminal 23 are brought into close contact with each other. The other end serves to support the bullet in one direction toward the connector terminal (23).

The support 26 is installed on the moving plate 21 to support the spring 25.

The guide bracket 27 is a member having a cross-section having an approximately 'C' shape. In the present embodiment, the guide bracket 27 is installed on the moving plate 21 via a fastening means (screw bolt) so as to be disposed on an upper portion of the fix terminal 22. do. In addition, the upper surface of the guide bracket 27 is provided with a guide hole (27a) penetrated up and down, the terminal connecting rod (53b) of the line replacement device 50 will be described later in this guide hole (27a) It is fitted to be elevated. On the other hand, if the shape of the guide hole (27a) is formed in the same shape as the end surface of the lower end of the terminal connecting rod (53b) rather than circular (round), the stepped portion of the guide connecting rod (53b) in the process of falling Since it is caught on the upper surface of (27), it is possible to limit the excessive falling of the terminal connecting rod (53b) is safe.

2 to 4, the elastic body 30 is inserted into the elastic accommodating groove 21b to be disposed between the housing 11 and the moving plate 21 to support the moving plate 21 in one direction. Do it.

For example, when a tensile force is applied to the cable (L), the cable fixing device 20 is pulled by the cable (L) and moved, wherein the elastic body 30 is compressed as shown in FIG. When the tensile force applied to the cable L is released, the cable fixing device 20 is moved by the restoring force of the compressed elastic body 30 to return to its original state as shown in FIG. 2.

2 and 4, both ends of the connector line 40 are installed in the connector terminal 23 of the cable fixing device 20 via fastening means (screw bolts), respectively, and the cable fixing device 20 ) Serves to electrically interconnect the cables (L) installed in each. And since the connector line 40 is built in the protective case 10 with a sufficient length, even if a tension is applied to the cable L so that the cable fixing device 20 is moved to the left and right, respectively, the connector line 40 is unfolded. The accommodation can improve the problem that the cable L is disengaged from the cable fastening device 20 due to the tensile force.

2 to 4, the line replacement device 50 includes a lifting mechanism 51, a connector pipe 52, and a terminal connection member 53. In the present embodiment, the line replacement device 50 includes a protective case 10. Internally connected to the cable fixing device 20 and the connector line (20) while electrically interconnecting a pair of cable fixing device 20, the cable (L) is installed so that the replacement of the connector line 40 in the live state 40) It serves to break the electrical connection between them.

The lifting mechanism 51 is composed of a lifting bolt 51a and an insulating block 51b, and the lifting bolt 51a and the insulating block 51b have a rotatable structure. The elevating bolt 51a is a member which is fastened to the nut part 11a so as to be elevated. A plurality of handles 51a-1 are integrally formed on the outer circumferential surface of the upper end so that an operator can rotate the elevating bolt 51a. A shaft hole 51a-2 opened downward is integrally formed therein, and the connecting portion 51b-1 of the insulating block 51b is rotatably coupled to the shaft hole 51a-2. In particular, the inner circumferential surface of the shaft hole (51a-2) is provided with a stepped portion protruding inwardly can be coupled to the connecting portion (51b-1) to prevent the separation of the insulating block (51b). The insulating block 51b is a member of an insulating material in the housing 11, the upper surface is integrally formed with a connecting portion 51b-1 rotatably coupled to the shaft hole 51a-2, elevating bolt 51a ) Is moved up and down together with the elevating bolt 51a by the rotation. And the fire detection sensor 60 and the control unit 70 is installed on the outer surface of the insulating block 51b, the fire extinguisher 80 is installed on the lower surface.

The connector pipe 52 is a member made of a conductive material that guides the extension bar 53a of the terminal connection member 53 and is horizontally inserted to penetrate the insulating block 51b. For example, the insulating block 51b and the connector pipe 52 may be manufactured integrally by insert molding, or may be formed by integrally inserting the connector pipe 52 into the insulating block 51b.

The terminal connecting member 53 is a member made of a conductive material composed of an extension bar 53a and a terminal connecting rod 53b. The terminal connecting member 53 is inserted to be movable through both ends of the connector pipe 52 so as to be electrically connected to the connector pipe 52. do. In this case, the extension bar 53a is inserted into the connector pipe 52 so as to be movable and is electrically connected to the inner surface of the connector pipe 52 by the ballistic piece 53a-1 provided at one end thereof. Here, the terminal connecting rod 53b extends downward from the other end of the extension bar 53a and is fitted into the guide hole 27a of the guide bracket 27. Particularly, the terminal connecting rod 53b is interposed between one end of the rotate terminal 24 and the fix terminal 22 when descending to electrically connect the fix terminal 22 and the rotate terminal 24 to each other. ) Is rotated about the shaft pin (P) to separate the other end of the rotate terminal 24 and the connector terminal 23 from each other. In addition, the lower end of the terminal connecting rod 53b is tapered so that it can be easily inserted between the fix terminal 22 and the rotate terminal 24. In addition, the terminal connecting rod 53b has a different size between the portion inserted into the fix terminal 22 and the portion inserted into the rotate terminal 24, which is inserted between the fix terminal 22 and the rotate terminal 24. This is to smoothly induce rotation of the rotate terminal 24 through the expansion of the diameter in the process so that the rotate terminal 24 is spaced apart from the connector terminal 23.

The fire detection sensor 60, the control unit 70, and the fire extinguisher 80 will be described in detail with reference to FIGS. 2, 4, and 6.

The fire detection sensor 60 is a known heat detection sensor installed on the outer surface of the insulating block 51b. In the present embodiment, a part of the wire is broken due to rodents (rats) to cause a fire due to an electric short circuit or deterioration. Therefore, the infiltration water flows into the inner side of the coated line which has lost the protection function, and thus detects heat when a fire occurs due to contact with a conductive wire through which current flows, and outputs a fire detection signal to the control unit 70.

The controller 70 is a controller installed on the outer surface of the insulating block 51b, and receives the fire detection signal from the fire detection sensor 60 and outputs an operation signal to the injection valve 81 of the fire extinguisher 80.

The fire extinguisher 80 is made of a steel container with a hard outer surface, and is filled with a fire extinguishing agent and compressed air or a non-combustible gas (nitrogen, carbon dioxide, halogen gas) liquefied at high pressure, and one side (lower side) of the container is inside The injection valve 81 which controls the flow of the extinguishing agent and non-combustible gas filled in and is controlled by the control unit 70 is installed.

For example, when the fire detection signal is output from the fire detection sensor 60 and input to the control unit 70, the control unit 70 immediately outputs an operation signal to the fire extinguisher 80, the operation signal of the control unit 70 The inlet is opened to the injection valve 81 of the fire extinguisher 80, and at this time, the extinguishing agent and non-combustible gas filled in the steel container are internally protected through the inlet of the injection valve 81 by internal pressure. It is sprayed on the fire zone to extinguish the fire zone at once.

Therefore, according to the present embodiment, it is possible to quickly extinguish when the fire occurs, so that the cable (L) can be prevented from being burned out by the fire, thereby minimizing the damage caused by the fire.

7 is a view for explaining the operation of the cable protection mechanism for power distribution and substation according to the present invention.

As shown in FIG. 7, when a tensile force is applied to the cable L, each cable fixing device 20 to which the cable L is connected is slid along the guide rail 12, where the cable fixing is performed. Since the terminal connecting member 53 of the line replacement device 50 fitted to the guide bracket 27 of the device 20 also moves together, the terminal connecting rod 53b does not change its position, so the fix terminal 22 ) And the rotate terminal 24 can be inserted.

In addition, the elastic body 30 is compressed while the movement of the cable fixing device 20 by the cable (L) is compressed, and when the tension force applied to the cable (L) is released, the elastic body 30 is the cable through the elastic restoring force The fixing device 20 is returned to the initial state.

Meanwhile, the connector line 40 is also unfolded and restored by repeated movement of the cable fixing device 20. In this process, fatigue stress is generated in the connector line 40, and thus the connector line 40 is repeated. ), Which can lead to fire.

When a fire occurs in the connector line 40 as described above, the fire detection sensor 60 detects this and outputs a fire detection signal to the control unit 70, the control unit 70 from the fire detection sensor 60 The fire detection signal is input to output the operation signal to the fire extinguisher 80, the injection valve 81 of the fire extinguisher 80 is operated by the operation signal of the control unit 70 to open the inlet.

As the inlet is opened to the injection valve 81 of the fire extinguisher 80, the extinguishing agent and the non-combustible gas filled in the inside of the steel container are internally protected through the inlet of the injection valve 81 by internal pressure. Fired in to extinguish the fire in a moment, and thus can prevent the cable (L) burned out by the fire to minimize the damage caused by the fire.

8A and 8B illustrate a process of replacing a connector line using a cable protection mechanism for power distribution and substation according to the present invention.

As shown in FIG. 2, the cable L drawn inwardly through both ends of the protective case 10 is a pair of cable fixing devices 20 disposed to be slidably movable inside the protective case 10, respectively. ) And the cable fixing device 20 is electrically interconnected via the connector line 40, so that the cable L is naturally electrically connected.

When replacing the connector line 40 due to aging and damage in the connected state as described above, as shown in Figures 8a and 8b, the operator lifts the elevating bolt 51a that is fastened to the nut (11a) When rotating by the handle 51a-1, the elevating bolt 51a is lowered along the nut part 11a, and as the elevating bolt 51a is lowered, it is rotatably coupled to the elevating bolt 51a. The insulating block 51b is lowered.

In addition, as the insulating block 51b descends, the connector pipe 52 naturally descends, and the terminal connection member 53 electrically connected to the connector pipe 52 descends due to the descending of the connector pipe 52. do.

In addition, the terminal connecting rod 53b of the terminal connecting member 53 penetrates through the guide bracket 27 and is inserted between the fix terminal 22 and the rotate terminal 24, and the rotate terminal 24 is connected to the terminal. The connecting rod 53b is rotated about the shaft pin P by the expanded diameter of the connecting rod 53b. The other end of the rotate terminal 24, which is in contact with the connector terminal 23 due to the rotation of the rotate terminal 24, is connected to the connector. Naturally spaced apart from the terminal 23, the spring 25 is naturally compressed during the rotation of the rotate terminal 24.

On the other hand, in the state in which the cable (L) is electrically connected through the terminal connecting member 53 drawn between the fix terminal 22 and the rotate terminal 24, the operator opens the cover 13 of the protective case 10 Open, pull out the connector terminal 23 and the damaged connector line 40 to the outside, and then install the new connector terminal 23 and the connector line 40 to the cable fixing device 20, and when the installation is completed, the cover (13) is closed and the cover 13 is fixed so that it may not open using the locking part 14. As shown in FIG.

Then, the operator rotates the elevating bolt 51a through the handle 51a-1 so that the insulating block 51b is raised so that the terminal connecting member 53 drawn between the fix terminal 22 and the rotate terminal 24 is provided. Will raise.

As the terminal connection member 53 moves up and down, the compressed spring 25 is restored and the rotary terminal 24 is pushed and rotated. As a result, the fix terminal 22 and the connector terminal 23 are rotated. The cable L is electrically connected to each other as the pair of cable fixing devices 20 are electrically connected to each other through the connector line 40.

According to the present embodiment, since the replacement operation of the connector line 40 can be performed in the live state without interrupting the electricity of the cable L, the operation is very convenient.

Although the present invention has been described in detail only with respect to the specific embodiments described, it will be obvious to those skilled in the art that various modifications and changes can be made within the technical scope of the present invention, and such modifications and modifications belong to the appended claims.

10: protective case 11: enclosure 12: guide rail
13: cover 14: locking portion 20: device for cable fixing
21: moving plate 22: pillars terminal 23: connector terminal
24: Rotate terminal 25: Spring 26: Support
27: guide bracket 27a: guide hole 30: elastic body
40: connector line 50: line replacement device
51: elevating mechanism 51a: elevating bolt 51a-1: steering wheel
51a-2: shaft hole 51b: insulating block 51b-1: connecting portion
52: connector pipe 53: terminal connecting member 53a: extension bar
53b: terminal connecting rod 60: fire detection sensor 70: control unit
80: fire extinguisher 81: injection valve

Claims (1)

The cable (L) is introduced into each of the inner space is provided through the both ends, the front surface is provided with an opening communicating with the inside, the upper surface of the housing 11 is formed integrally with the nut portion (11a) and the enclosure Guide rails 12 spaced apart from the bottom surface of the inner both ends of the 11 and protruding from each other, a cover 13 for opening and closing the opening of the enclosure 11, and installed in the enclosure 11 to cover the cover 13. A protective case 10 made of an insulating material including a locking part 14 for intermittent opening and closing;
Insulated spaced apart from each other in the interior of the enclosure 11 is moved along the guide rail 12, the coupling hole 21a is provided on the upper end of one end, the elastic receiving groove 21b is provided on both sides of the other end Fixing terminal 22 which is fixed to the moving plate 21 by a fastening means so that the moving plate 21 of the material and the cable (L) drawn inwardly through both ends of the housing 11 can be electrically connected. The connector terminal 23 is removably inserted into the coupling hole 21a, and is pivotably coupled to the moving plate 21 via the shaft pin P to electrically connect the fix terminal 22 and the connector terminal 23 to each other. Rotate terminal 24 to be connected to the spring, the spring 25 for supporting the rotation terminal 24 in one direction, the support 26 is provided on the moving plate 21 to support the spring 25, and the fix It is installed on the moving plate 21 so as to be disposed on the upper part of the terminal 22, and the guide hole 27a is formed. Cable device 20 is configured for fixing to the guide bracket (27) for;
An elastic body 30 which is inserted between the housing 11 and the moving plate 21 and inserted into the elastic body receiving groove 21b to support the moving plate 21 in one direction;
A connector line 40 having both ends respectively installed at the connector terminals 23 of the cable fixing device 20 to electrically interconnect the cables L installed at the cable fixing device 20, respectively;
Lifting bolt 51a, which is fastened to the nut part 11a so as to be liftable, has a plurality of handles 51a-1 formed on the outer circumferential surface of the upper end, and integrally formed therein with a shaft hole 51a-2 opened downward. An elevating mechanism 51 comprising an insulating block 51b which is installed in the enclosure 11 and moved up and down by an elevating bolt 51a having a connecting portion 51b-1 rotatably coupled to the 51a-2. Wow,
A connector pipe 52 made of a conductive material inserted into the insulating block 51b horizontally and integrally formed with the insulating block 51b;
From the other end of the elongation bar 53a and the elongation bar 53a, the elastic bar 53a-1, which is movably fitted through both ends of the connector pipe 52, is provided at one end with an elastic force piece 53a-1 that is in contact with the inner surface of the connector pipe 52. It extends downward and is fitted into the guide hole 27a of the guide bracket 27, and intervenes between one end of the rotate terminal 24 and the fix terminal 22 when descending to electrically connect the fix terminal 22 and the rotate terminal 24. Of the conductive material having a terminal connecting rod 53b which rotates the rotate terminal 24 around the shaft pin P and spaces the other end of the rotate terminal 24 and the connector terminal 23 from each other while connecting each other. A line replacement device 50 composed of the members 53;
A fire detection sensor (60) installed on the insulating block (51b) to detect heat generated in a fire and output a fire detection signal;
A control unit 70 receiving the fire detection signal from the fire detection sensor 60 and outputting an operation signal;
A fire extinguisher equipped with an injection valve 81 which is operated and controlled by an operation signal of the control unit 70 and installed in the insulating block 51b to spray fire extinguishing liquid filled therein through the injection valve 81 to extinguish a fire ( 80); Cable protection device for power distribution and substation comprising: a.

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