KR102292778B1 - Pull-out vacuum interrupter load switch with fuse and arrester - Google Patents

Abstract

The present invention relates to a draw-out-type vacuum interrupter load switch. In accordance with the present invention, the draw-out-type vacuum interrupter load switch equipped with a fuse and an arrester includes a switching part, a fuse part and an arrester. The switching part includes: a vacuum interrupter leading electricity to be applied or cut off in a sealed space; an insulation housing a fixed conductor attached to one side of the vacuum interrupter therein; a moving conductor part attached to the other side of the vacuum interrupter in the insulation housing; and an insulation rod moving the vacuum interrupter to apply or cut off electricity. The moving conductor part includes a flexible conductor connected with the insulation rod and allowing the movement of the vacuum interrupter, and a terminal connected to the flexible conductor. The fuse part includes a fuse electrically connected with the terminal. Therefore, the present invention is capable of providing convenience in terms of design and preventing accidents.

Description

Pull-out vacuum interrupter load switch with fuse and arrester

The present invention relates to a load switchgear, and more particularly, to a draw-out type vacuum interrupter load switch having a fuse and a lightning arrester.

In general, electricity with a voltage of about 22,900V from the substation is supplied to the switchboard of each customer through the power company's distribution line. At this time, in accordance with the electrical equipment technical standards and extension regulations announced by the Ministry of Trade, Industry and Energy, the load switchgear that can control the distribution line and the customer inside the switchboard and the electricity accident and lightning strike inside the customer A fuse and a lightning arrester are to be installed to protect the load equipment. 1 is a circuit diagram illustrating the configuration of a consumer switchboard.

Hereinafter, a load switch according to the prior art will be described with reference to FIGS. 2 to 4 . 2 is a view showing the structure of a conventional air insulated load switchgear, an opening/closing unit 10 for conducting or cutting off electricity, and a fuse 20 for cutting off a fault current caused by an electrical accident inside the consumer. , and an interlocking operation mechanism 30 for interlocking and blocking the opening/closing unit 10 during the blocking operation of the fuse 20 .

Air insulated load switchgear has a problem in that arc scattering products are released to the outside during opening/closing operation to conduct or cut off electricity due to the opening/closing part 10 of a non-closed structure, and opening/closing due to environmental influences such as humidity and dust It has a problem of contact personnel accidents due to performance degradation and external exposure of the electric conducting part.

In addition, the air insulated load switchgear has a problem in that it is difficult to inspect and repair except for the method of removing the electricity after shutting off the electricity due to the structure in which it cannot be withdrawn to the outside of the switchboard when a failure occurs, resulting in a long-term power outage. Since it cannot be installed on the pole, a lightning arrester must be installed in a separate space to be electrically connected to the air-insulated load switchgear, so there is a problem in that additional insulation must be secured.

In order to solve the problem of the air insulated load switchgear, a pull-out type load switchgear (Registration Patent No. 10-1324731) was invented.

3 shows the structure of a pull-out type load switchgear, and FIG. 4 cites the structure of a bushing for a draw-out type load switchgear. is accommodated inside the insulation housing 114, and the problem of external emission of arc scattering products of the conventional air insulated load switchgear, the problem of deterioration of switching performance due to environmental influences such as humidity and dust, and the exposure of the electric current part. The problem of contact personnel accidents was solved.

In addition, by devising the tulip contact part 720 accommodated in the bushing 700 for the pull-out type load switchgear and the sliding contact part 132 of the pull-out type load switchgear, the conventional air insulation type It solves the problem of difficult inspection and repair in the event of a failure of the load switchgear.

As shown, the problems of the conventional air insulated load switchgear were partially solved by the draw-out type load switch, but the fuse (20) was not installed in the conventional air insulated load switchgear. 20), there was a problem in that the function of blocking and interlocking the opening/closing unit 110 was lost.

In addition, the draw-out type load switchgear also has the problem of not being able to mount a lightning arrester inside the load switchgear, which has been a problem in the conventional air insulated load switchgear.

5 is a circuit diagram showing a state when there is no blocking interlocking function of the opening/closing unit 110 of the load switchgear during the fuse 20 blocking operation. It can be confirmed that a phase loss energization state occurs.

In this phase-loss energized state, overload operation of the load facility is caused, and the resulting heat generation shortens the lifespan of the load facility and causes damage, which causes economic loss and fire.

As described above, with the prior art, there is a problem of external emission of arc scattering products, a problem of deterioration of opening and closing performance due to environmental influences such as humidity and dust, a problem of contact personnel accidents due to external exposure of an electric current conducting part, and inspection when a failure of a load switch occurs. It is difficult to solve all of the problems of maintenance and repair difficulties, the inability to interlock the switchgear when the fuse is disconnected due to the inability to install the fuse, secure a separate space due to the impossibility of installing an arrester inside the load switchgear, and secure additional insulation. There is an impossible problem.

Korean Patent Publication No. 10-2018-0087507 (2018.08.02.)

The present invention is to solve the above problems, and the problem to be solved in the present invention is a draw-out type vacuum interrupter having a fuse and a lightning arrester that reduces the size of the switchboard by integrating the switchgear, the fuse and the lightning arrester and enables convenience in design. To provide a load switch.

A draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention for solving the above problems includes an opening/closing unit, a fuse unit and a lightning arrester, and the opening/closing unit is configured to conduct or cut off electricity in an enclosed space. A vacuum interrupter, an insulating housing for accommodating a fixed conductor attached to one side of the vacuum interrupter, a movable conductor part attached to the other side of the vacuum interrupter inside the insulating housing, and moving the vacuum interrupter to conduct electricity or cut off electricity and an insulating rod, wherein the movable conductor part is connected to the insulating rod, and includes a flexible conductor allowing movement of the vacuum interrupter and a terminal connected to the flexible conductor, wherein the fuse unit is electrically connected to the terminal The inclusion of a fuse has a technical feature.

In addition, the draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention includes: a fixing holder electrically connected to the terminal and fixing the fuse; a rotating holder capable of a constant rotational movement so that the fuse can be easily mounted or removed; a fuse terminal electrically connecting the rotating holder; and a support insulator for fixing and insulating the rotation holder and the fuse terminal, wherein the fixing holder is fixed to a fuse holder case molded of ABS resin, and the fuse holder case is in contact by exposing an electrically conducting portion of the fixing holder. It may be configured to be fastened to a fuse holder cover molded of ABS resin to prevent personnel accidents.

The fuse unit of the pull-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention may further include an insulating plate coupled between the fuse terminal and the support insulator to provide additional insulation.

The fuse holder case of the pull-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention has an uneven fixing protrusion, and also the fuse holder cover has an uneven fixing button, the fixing projection and the fixing protrusion are formed. When the concavo-convex shapes of the buttons are engaged with each other, the fuse holder case and the fuse holder cover may be mounted and fixed.

A draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention includes a fixed pin which is fixed to a rotating holder and rotates; a trip lever fixed to the fixing pin and rotating together; It may be configured to include an interlocking operation mechanism including a; trip rod connected to the connection lever to move horizontally.

In the draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention, when the fuse is cut off by a fault current, a striker provided in the fuse protrudes, and the trip lever is moved in the horizontal direction by the striker to move, the fixing pin and the connecting lever interconnected to the trip lever are moved, and the trip rod is moved by the movement of the connecting lever to block the opening/closing part.

The draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention has the effect of reducing the size of the switchboard and providing convenience in design by integrating the switchgear, the fuse and the arrester.

By accommodating the vacuum interrupter inside the insulation housing according to the present invention, arc scattering products are not released to the outside during the opening and closing operation to conduct or cut off electricity, and the switching performance does not deteriorate due to environmental influences such as humidity and dust. , the electrically conducting part is formed to be wrapped with an insulator, so it is possible to prevent contact accidents.

The draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention has the effect of preventing a life span shortening, burnout, and fire caused by overload operation and heat generation of a load facility due to energization of a phase loss.

The draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention enables easy inspection and repair of the vacuum interrupter load switch and the fuse and arrester attached to the vacuum interrupter load switchgear, and failure through such preventive inspection and repair It is effective in preventing economic loss by shortening the power outage time caused by this.

6 is a perspective view showing a draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.
7 is a cross-sectional view showing the structure of the opening/closing part of the draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.
8 is an exemplary view of coupling the clip conductor of the draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.
9 is a cross-sectional view showing the structure of an opening/closing part of a draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.
10 is a cross-sectional view showing the structure of the fuse unit of the draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.
11 is a detailed view showing the fastening of the fuse holder case and the fuse holder cover of the pull-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.
12 is a diagram illustrating the mounting and dismounting of a fuse holder case and a fuse holder cover of a pull-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.
13 is a view illustrating a fuse mounting of a draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.
14 is an external view of an outer case of a draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.
15 is an external view of an interlocking operation mechanism of a draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.
16 is a diagram illustrating the external appearance of a pull-out vacuum interrupter load switch fuse having a fuse and a lightning arrester according to the present invention, and the structure and operation of the fuse are generally known.
17 is a diagram illustrating the operation of the interlocking operation mechanism of the draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.
18 is a circuit diagram showing a state of interruption and interlocking by an interlocking operation mechanism of a draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.
19 is an external view showing a state in which a pull-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention is drawn in and out of the switchboard.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In describing each figure, like reference numerals have been used for like elements. In describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be

On the other hand, when it is mentioned that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention.

The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, a draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention will be described in detail with reference to the accompanying drawings.

6 is a perspective view showing a draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.

Referring to FIG. 6 , a draw-out type vacuum interrupter load switch having a fuse and a lightning arrester includes an opening/closing unit 200 , a fuse unit 300 , an enclosure 400 , an interlocking operation mechanism 500 and an arrester 600 . can be

7 is a cross-sectional view showing the structure of the opening/closing part of the draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.

Referring to FIG. 7, the opening/closing unit 200 accommodates a vacuum interrupter 211 for conducting or blocking electricity in an enclosed space, and a fixed conductor 212 attached to one side of the vacuum interrupter 211 inside. Insulation housing 210 molded with epoxy resin, movable conductor 220 and vacuum interrupter 211 attached to the other side of vacuum interrupter 211 inside the insulating housing 210 to conduct electricity or cut off electricity. It may be configured to include an insulating rod 230 . In this case, the insulating rod 230 may be formed of polycarbonate resin to perform a function of conducting or blocking electricity.

The movable conductor part 220 includes a flexible conductor 221 that can allow the movement of the vacuum interrupter 211, and the terminal 222 except for the connection part for electrical connection is insulated with ethylene propylene rubber. It may be composed of

The clip conductor 240 is a component installed at the end of the fixed conductor 212 accommodated in the insulating housing 210, and the clip conductor 240 is assembled to draw out a fuse and a lightning arrester according to the present invention. The vacuum interrupter load switch can be withdrawn to the outside of the switchboard, providing convenience for inspection and maintenance.

8 is a view illustrating coupling of clip conductors of a pull-out type vacuum interrupter load switch with a fuse and an arrester according to the present invention, and FIG. is a cross-sectional view showing

As shown in FIGS. 8 and 9 , by accommodating the vacuum interrupter 211 inside the insulating housing 210, the arc scattering product is not released to the outside during the opening/closing operation to conduct or cut off electricity, and humidity and dust There is no deterioration in opening/closing performance due to environmental influences such as such, and the electrically conducting part is formed to be covered with an insulator, so it is possible to prevent contact accidents.

10 is a cross-sectional view showing a structure of a fuse unit of a draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.

Referring to FIG. 10 , the fuse unit 300 is electrically connected to the terminal 222 and has a fixed holder 330 for fixing the fuse 370 , and a constant rotational motion so that the fuse 370 can be easily mounted or removed. This possible rotation holder 340, a fuse terminal 350 for electrically connecting the rotation holder 340, and a support insulator 360 for fixing the rotation holder 340 and the fuse terminal 350 to insulate it. .

The fixing holder 330 is fixed to the fuse holder case 310 molded of ABS resin, and the fuse holder case 310 is made of ABS resin in order to prevent a contact accident due to exposure of an electrically energized portion of the fixing holder 330. It may be formed so that the molded fuse holder cover 320 can be fastened.

A clip conductor 240 is assembled on one side of the fuse terminal 350 so that the pull-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention can be withdrawn to the outside of the switchboard, thereby providing convenience of inspection and maintenance. .

The fuse unit 300 having this configuration may include an insulating plate 380 that is fastened between the fuse terminal 350 and the support insulator 360 to provide additional insulation to minimize external exposure of the electrically conducting unit.

11 is a detailed view of a coupling part between a fuse holder case and a fuse holder cover of a pull-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention, and FIG. 12 is an example of mounting and dismounting.

11 , the fuse holder case 310 has a fixing protrusion 311 formed in a concave-convex shape, and a fixing button 321 having a concave-convex shape is also formed on the fuse holder cover 320 , so that the fixing protrusion 311 is formed. ) and the concave-convex shape of the fixing button 321 are engaged with each other, it is configured to be mounted and fixed.

12, when the fuse holder cover 320 is pushed into the fuse holder case 310, it is in a mounted state, and the fuse holder cover 320 is pulled from the fuse holder case 310 by pressing the fixing button 321. configured to be released.

The structure of the fuse holder case 310 and the fuse holder cover 320 as described above prevents exposure of the electrically conducting portion to the outside in the mounted state to prevent a contact accident, and provides the convenience of replacing the fuse in the released state.

13 is a view illustrating a fuse mounting of a draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.

Referring to FIG. 13 , the fuse 370 is pushed in the direction of the central axis of the rotating holder 340 rotatable at a certain angle to be coupled, and after the fuse 370 and the rotating holder 340 are combined, the fixed holder (330) is lifted in the vertical direction to enable final mounting.

The mounting method using the fuse 370, the rotating holder 340, and the fixed holder 330 as described above provides convenience to the user when replacing the fuse 370 with a new fuse 370 by the blocking operation of the fuse 370, and , when the fixed holder 330 and the fuse 370 are not coupled and only the fuse 370 and the rotating holder 340 are maintained in a coupled state, the effect of providing an additional disconnection function in addition to the intermittent function of the load switchgear is effective. have.

14 is an external view of an outer case of a draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.

Referring to FIG. 14 , the enclosure 400 fixes the opening/closing unit 200 and the fuse unit 300 , and a frame 410 made of a metal material to prevent an electric shock accident due to a potential difference when electricity is supplied. ), and a wheel 420 formed at the lower end, and the wheel 420 functions to smoothly withdraw or draw in the draw-out type vacuum interrupter load switch having the fuse and lightning arrester according to the present invention.

15 is an external view of an interlocking operation mechanism of a draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.

15 , the interlocking operation mechanism 500 includes a fixing pin 510 fixed to the rotation holder 340 and rotating, a trip lever 520 and a connection lever 530 fixed to the fixing pin 510 and rotated together. ), and is configured to include a trip rod 540 connected to the connection lever 530 to horizontally move.

16 is an external view of a pull-out type vacuum interrupter load switch fuse having a fuse and a lightning arrester according to the present invention. The fuse 370 has a striker 371 that protrudes when a breaking operation is made by a fault current, and has a predetermined length. It is configured to include an upper cap 373 and a lower cap 374 which are respectively provided on one side and the other side of the ceramic main tube 372 and the ceramic main tube 372 arranged in the center.

The configuration and operation of the fuse 370 are generally known, and detailed descriptions thereof will be omitted.

17 is a diagram illustrating the operation of the interlocking operation mechanism of the draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.

16 and 17 , the striker 371 protrudes when the fuse 370 is cut off by the fault current. At this time, the trip lever 520 of the interlocking operation mechanism 500 is moved in the horizontal direction by the striker 371. Accordingly, the fixing pin 510 and the connecting lever 530 connected to the trip lever 520 are mutually connected. will also move

Therefore, the trip rod 540 is moved by the movement of the connection lever 530 to block the opening/closing part 200 of the draw-out type vacuum interrupter load switch having the fuse and lightning arrester according to the present invention.

18 is a circuit diagram showing a state of interruption and interlocking by an interlocking operation mechanism of a draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention.

Referring to FIG. 18 , in the case of a fuse breaking operation according to a one-phase accident in a three-phase power source, the cut-off interlocking operation by the interlocking operation mechanism 500 of the draw-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention. It can be confirmed that a phase loss energization state cannot occur, and this function can prevent overload operation of load facilities due to phase loss energization and shortening of lifespan due to heat generation, burnout, and occurrence of fire.

19 is an external view showing a state in which a pull-out type vacuum interrupter load switch having a fuse and a lightning arrester according to the present invention is drawn into or withdrawn from the switchboard.

Referring to FIG. 19, the vacuum interrupter load switchgear and the vacuum interrupter load switchgear are attached to the inside of the vacuum interrupter load switchgear and the vacuum interrupter load switchgear by installing the draw-out type vacuum interrupter load switchgear provided with the fuse and the arrester according to the present invention. It can also be seen that the inspection and repair can be easily done.

Therefore, it is possible to prevent economic loss by shortening the power outage time due to failure through easy preventive inspection and maintenance.

Although the technical spirit of the present invention described above has been specifically described in the preferred embodiment, it should be noted that the above-described embodiment is for the purpose of explanation and not for limitation thereof. In addition, those of ordinary skill in the technical field of the present invention will understand that various embodiments are possible within the scope of the technical spirit of the present invention. Accordingly, the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims.

200: opening and closing part 210: insulating housing
211: vacuum interrupter 212: high conductor
220: movable conductor 221: flexible conductor
222: terminal 230: insulated rod
240: clip conductor 300: fuse unit
310: fuse holder case 311: fixing projection
320: fuse holder cover 321: fixed button
330: fixed holder 340: rotating holder
350: fuse terminal 360: support insulator
370: fuse 400: enclosure
410: frame 420: wheel
500: interlocking operation mechanism 510: fixing pin
520: trip lever 530: connection lever
540: trip rod 600: lightning arrester

Claims (6)

In the draw-out type vacuum interrupter load switch,
The draw-out type vacuum interrupter load switch includes an opening/closing unit 200, a fuse unit 300 and an arrester 600,
The opening/closing unit 200 includes a vacuum interrupter 211 for allowing electricity to flow or cut off in an enclosed space, and an insulating housing 210 for accommodating a high conductor 212 attached to one side of the vacuum interrupter 211 therein. ), the movable conductor part 220 attached to the other side of the vacuum interrupter 211 inside the insulating housing 210 and the insulating rod 230 for moving the vacuum interrupter 211 to conduct electricity or cut off electricity. including,
The movable conductor part 220 includes a flexible conductor 221 connected to the insulating rod 230 and allowing movement of the vacuum interrupter 211 and a terminal 222 connected to the flexible conductor 221 . and
The fuse unit 300 includes a fuse 370 electrically connected to the terminal 222,
The fuse unit 300 is
a fixing holder 330 electrically connected to the terminal 222 to fix the fuse 370;
a rotating holder 340 capable of performing a constant rotational movement so that the fuse 370 can be easily mounted or removed;
a fuse terminal 350 electrically connecting the rotating holder 340;
and a support insulator 360 for fixing and insulating the rotation holder 340 and the fuse terminal 350,
The fixing holder 330 is fixed to the fuse holder case 310 molded of ABS resin,
The fuse holder case 310 is a fuse and a lightning arrester, characterized in that it is fastened to a fuse holder cover 320 molded of ABS resin in order to prevent a contact accident due to exposure of an electrically energized portion of the fixing holder 330 . A draw-out type vacuum interrupter load switch.
delete According to claim 1,
The fuse unit (300) is fastened between the fuse terminal (350) and the support insulator (360) to provide additional insulation and further includes an insulating plate (380). Type vacuum interrupter load switch.
According to claim 1,
The fuse holder case 310 is formed with a fixing protrusion 311 in the form of concavo-convex,
The fuse holder cover 320 is also formed with an uneven fixing button 321,
When the concavo-convex shapes of the fixing protrusion 311 and the fixing button 321 are engaged with each other, the fuse holder case 310 and the fuse holder cover 320 are mounted and fixed. Draw-out type vacuum interrupter load switch.
According to claim 1,
a fixing pin 510 fixed to the rotation holder 340 and rotating;
a trip lever 520 fixed to the fixing pin 510 and rotating together;
a connection lever 530 fixed to the fixing pin 510 and rotating together;
A pull-out type vacuum interrupter load switch having a fuse and a lightning arrester, characterized in that it comprises an interlocking operation mechanism (500) including a trip rod (540) connected to the connection lever (530) to move horizontally.
6. The method of claim 5,
When the fuse 370 is cut off by the fault current,
A striker 371 provided in the fuse 370 protrudes,
The trip lever 520 is moved in the horizontal direction by the striker 371,
The fixing pin 510 and the connecting lever 530 interconnected to the trip lever 520 are moved,
A pull-out type vacuum interrupter load switch having a fuse and a lightning arrester, characterized in that the trip rod (540) is moved by the movement of the connection lever (530) to block the opening/closing unit (200).

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