Protection cover for bushing terminal

Abstract

In the present invention, a tubular base is formed to surround the outer circumference of a low-pressure bushing, and a plurality of elastic plates are arranged radially on the inner circumference of the hollow of the base, which deform elastically by elasticity when subjected to external force and adhere to the inner circumference of the low-pressure bushing; a holder part having first and second locking tabs protruding from both sides of the outer surface of the base; a first cap part formed in a semi-cylindrical shape to cover half of the outer circumference of the low-pressure bushing, having a first locking hook protruding from one edge so that it can be locked by hooking onto the first locking tab to maintain a closed state where one side abuts the half edge of the holder part, and having a first lowering line hole formed to allow a secondary lowering line to pass through; and a first cap part formed in a semi-cylindrical shape to cover the other half of the outer circumference of the low-pressure bushing, having one side so that it can be locked by hooking onto the second locking tab to maintain a closed state where one side abuts the other half edge of the holder part. A low-voltage bushing terminal insulation cover for a pole-mounted transformer is disclosed, comprising a second locking ring protruding from the edge and a second down line hole formed to allow a second down line to pass through, and a second cap part connected to the first cap part by a hinge line on one side, which can be opened by spreading to one side around the hinge line and closed so that the surface facing the first cap part comes into contact.

Description

Technology Field

[0001] The present invention relates to an insulating cover having electrical insulation properties that is attached to cover the connection portion of the low-voltage bushing terminal and the secondary down line exposed to the outside of the case of a pole-mounted transformer. More specifically, the invention relates to an insulating cover for a low-voltage bushing terminal for a pole-mounted transformer that covers the low-voltage bushing to which the low-voltage distribution line is connected to the transformer to protect it from external impacts, thereby preventing damage and breakage of the low-voltage bushing caused by collision with other adjacent pole-mounted transformers during transportation and storage of the pole-mounted transformer, minimizing contamination by foreign substances such as dust, and also preventing electric shock accidents caused by contact with external objects by a worker during live-line proximity work on a power pole. Background Technology

[0002] A transformer is a device that converts the voltage or current of alternating current using the phenomenon of electromagnetic induction. In particular, a pole-mounted transformer is a device that changes the voltage supplied from a substation to consumers through distribution lines into a voltage suitable for the intended use of various facilities, such as household or industrial applications.

[0003] As shown in FIG. 1, this pole-mounted transformer includes a box-shaped outer casing with a structure in which the opening of a cylindrical body (1) is sealed with a lid (2), a high-voltage bushing (3) installed to pass through the interior of the body (1) from the upper surface of the lid (2) to apply high-voltage power supplied from the outside to the winding, and a low-voltage bushing (4) installed to pass through the interior of the side of the body (1) to draw out transformed low-voltage power to consumers, etc.

[0004] However, while the high-voltage bushing (3) of the pole-mounted transformer is made of an insulating protective structure, the low-voltage bushing (4) is a structure that is exposed and protrudes outward from the surface of the outer casing, so there was a problem in that it could easily be damaged or broken due to collisions with other adjacent pole-mounted transformers or various equipment during transportation and storage, as well as contamination by foreign substances such as dust.

[0005] In addition, there was a problem in that the protruding part of the low-voltage bushing (4) came into contact with an adjacent pole-mounted transformer during the process of moving the pole-mounted transformer, causing scratches or damage to the surface of the outer casing.

[0006] In addition, there was a problem where the insulation or paint layer would peel off and rust easily as the pole-mounted transformers collided with each other during the process of transporting them, such as loading and unloading them onto vehicles.

[0007] In order to solve this problem, conventional methods have involved wrapping pole-mounted transformers in multiple layers of vinyl film to prevent external damage or contamination until they reach their destination, a process known as ramping. However, since vinyl film must be disposed of or incinerated after a single use, it has the problem of causing environmental pollution.

[0008] Meanwhile, during live-line work on power poles, if a worker's body or tools inadvertently come into contact with the low-voltage bushing terminals of a pole-mounted transformer due to carelessness, it can result in an electric shock accident.

[0009] It is stated that the background technology or prior art described above refers to information possessed by the inventor or acquired during the process of deriving and completing the present invention, and is intended to aid in understanding the technical significance of the present invention and to be useful for prior art search and examination, but does not mean technology that is generally known and widely used in the technical field to which the invention belongs prior to the filing of the present invention. Prior art literature

[0010] (Patent Document 0001) KR 10-2311369 B1(2021. 10. 05.)(Patent Document 0002) KR 20-0231492 Y1(2001. 05. 10.) The problem to be solved

[0011] Accordingly, the inventors have devised the present invention as a result of continuous research and strenuous efforts to develop a new structure of insulation cover for a low-voltage bushing terminal of a pole-mounted transformer. This involves comprehensively considering the aforementioned factors to completely cover and wrap the low-voltage bushing of the pole-mounted transformer to protect it from external impacts, thereby preventing damage or breakage caused by the protruding part of the low-voltage bushing coming into contact with or colliding with an adjacent pole-mounted transformer during transportation and storage, or causing scratches on the outer surface of the pole-mounted transformer. Furthermore, it minimizes contamination by foreign substances such as snow, rain, and dust, prevents electric shock accidents caused by contact with external objects by workers during live-line proximity work on power poles, allows for general-purpose use depending on the capacity of the pole-mounted transformer, prevents detachment due to wind or contact with external objects while the low-voltage bushing terminal is completely covered, and enables convenient attachment regardless of the direction and position of the secondary down line of the pole-mounted transformer.

[0012] Therefore, the technical problem and objective of the present invention is to provide an insulating cover for a low-voltage bushing terminal for a pole-mounted transformer that covers and wraps the low-voltage bushing to prevent damage caused by contact or collision between transformers and scratches on the casing, and to prevent electric shock accidents caused by contact with external objects during live-line proximity work on power poles.

[0013] Another technical problem and objective of the present invention is to provide an insulating cover for a low-voltage bushing terminal for a pole-mounted transformer that prevents detachment due to wind or contact with external objects, and allows for easy attachment regardless of the direction and position of the secondary down line of the pole-mounted transformer.

[0014] The technical problems and objectives that the present invention aims to solve are not limited to those mentioned above, and other unmentioned technical problems and objectives will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0015] A specific means according to an aspect of the present invention for effectively achieving a specific technical purpose while embodying a new concept for solving the technical problem of the present invention as described above comprises: a tubular base formed to surround the outer circumference of a low-pressure bushing exposed on the outside of the outer casing of a pole-mounted transformer; a plurality of elastic plates arranged radially on the inner circumference of the hollow of the base, which deform elastically by elasticity when subjected to external force and adhere to the circumference of the bushing of the low-pressure bushing; a holder part having first and second locking tabs protruding from both sides of the outer surface of the base; a first cap part formed as a hollow semi-cylindrical shape to cover and conceal half of the outer circumference of the low-pressure bushing, having a first locking hook protruding from one edge so as to be hooked onto the first locking tab to maintain a closed state where one side abuts the half edge of the holder part, and having a first down line hole formed to allow the secondary down line of the pole-mounted transformer to pass through; and the low-pressure bushing The present invention provides an insulating cover for a low-voltage bushing terminal of a pole-mounted transformer, characterized by being formed as a hollow semi-cylindrical shape to cover and conceal the other half of the outer circumference, having a second locking hook protruding from one edge so as to be locked by hooking onto the second locking tab to maintain a closed state where one side contacts the other half edge of the holder part, having a second down line hole formed to allow the secondary down line of the pole-mounted transformer to pass through, and comprising a second cap part connected to one side of the first cap part by a hinge line so as to open to one side centered on the hinge line and close so that the surface facing the first cap part contacts.

[0016] Thus, the present invention protects the low-voltage bushing of a pole-mounted transformer from the outside by simply attaching it as if covering it, and absorbs and mitigates external shocks, thereby preventing damage to the low-voltage bushing or scratches on the outer casing of other pole-mounted transformers caused by contact or collision with adjacent pole-mounted transformers during transportation, storage, or installation of the pole-mounted transformer.

[0017] In addition, it can minimize contamination caused by snow, rain, dust, etc., and prevent workers from being injured by accidentally hitting the protrusions of the low-pressure bushings.

[0018] Furthermore, by completely covering and insulating the low-voltage bushing terminals, it is possible to prevent electric shock accidents caused by contact with external objects by workers during live-line proximity work on power poles.

[0019] In addition, in a preferred aspect of the present invention, a first fitting projection is formed protrudingly on the inner edge surface of the base facing the edge surfaces of the first and second cap parts to be pressed into the inner edge of the first and second cap parts for tight coupling; a rib is formed protrudingly between the inner circumference of the base and the outer circumference of the elastic plate to increase the restoring force attempting to return to the original state upon elastic deformation of the elastic plate and to strengthen the elastic force; the cross-sectional shape of the base and the cross-sectional shape of the first and second cap parts are formed as ellipses; a third locking projection is formed protrudingly on one side of the first cap part, and a third locking hook is formed on the side opposite the third locking projection; a fourth locking hook is formed on one side of the second cap part to be locked by hooking onto the third locking projection, and a fourth locking projection is formed protrudingly on the side opposite the fourth locking hook; and among the edge surfaces where the first cap part and the second cap part come into contact with each other, the edge surface of the first cap part A fitting groove is formed, and a second fitting projection is formed protruding from the edge surface of the second cap portion corresponding to the fitting groove to press into the fitting groove and tightly bond, so that the elastic plate naturally and flexibly bends outward in accordance with the shape of the low-pressure bushing, allowing it to be universally applied and attached regardless of the size of the low-pressure bushing, and can maintain a state of being more stably attached to the outer circumference of the low-pressure bushing, as well as prevent it from falling off due to wind or contact with external objects. Effects of the invention

[0020] According to the technical concept and embodiment of the present invention, which is based on a unique solution means to solve the technical problem described above, the low-voltage bushing of a pole-mounted transformer is easily attached as if covering it to protect it from external impact, thereby allowing the impact force to be naturally absorbed and mitigated through elastic action even if the pole-mounted transformer comes into contact with or collides with other adjacent pole-mounted transformers during transportation, storage, or installation.

[0021] Therefore, the safety of transportation and storage can be enhanced by preventing damage to the low-voltage bushing or scratches on the enclosure of adjacent pole-mounted transformers due to contact or collision with other pole-mounted transformers during transportation, storage, or installation of the pole-mounted transformer.

[0022] Furthermore, since it completely covers the low-voltage bushing of the pole-mounted transformer, contamination of the low-voltage bushing by foreign substances such as snow, rain, and dust can be minimized.

[0023] In addition, it can prevent workers from being injured by accidentally bumping into the low-voltage bushing protruding from the enclosure of the pole-mounted transformer.

[0024] Furthermore, since the low-voltage bushing terminal is completely covered and insulated, it not only prevents electric shock accidents caused by contact with external objects during live-line work near power poles but also prevents detachment due to wind or contact with external objects.

[0025] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims. Brief explanation of the drawing

[0026] Figure 1 is a front view showing an example of a pole-mounted transformer. FIG. 2 is a perspective view showing an insulating cover for a low-voltage bushing terminal for a pole-mounted transformer according to an embodiment of the present invention. FIG. 3 is an exploded perspective view showing a low-voltage bushing terminal insulation cover for a pole-mounted transformer according to an embodiment of the present invention. FIG. 4 is a perspective view showing the first and second cap portions opened among the main elements constituting the insulation cover of a low-voltage bushing terminal for a pole-mounted transformer according to an embodiment of the present invention. FIG. 5 is a bottom perspective view showing the first and second cap portions opened among the main elements constituting the insulation cover of a low-voltage bushing terminal for a pole-mounted transformer according to an embodiment of the present invention. FIG. 6 is a local cross-sectional view showing the usage state in which a low-voltage bushing terminal insulation cover for a pole-mounted transformer according to an embodiment of the present invention is attached to the low-voltage bushing of a pole-mounted transformer. Specific details for implementing the invention

[0027] Hereinafter, embodiments according to the present invention will be described in more detail with reference to the attached drawings.

[0028] Prior to this, it is specified that the terms described below are defined in consideration of their functions in the present invention, and should be interpreted in accordance with the concept consistent with the technical spirit of the present invention and the meaning commonly accepted or recognized in the relevant technical field.

[0029] In addition, if it is determined that a detailed description of known functions or configurations related to the present invention could obscure the essence of the present invention, such detailed description is omitted.

[0030] It is stated that the drawings attached herein may be partially exaggerated or simplified to facilitate the explanation and understanding of the configuration and operation of the technology, and that each component in the drawings does not exactly correspond to its actual size and shape.

[0031] In addition, the term "and / or" in this specification means a combination of multiple related described items or includes any of the multiple related described items, and when a part is said to include a certain component, it means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0032] In other words, terms such as "comprising" or "having" as set forth in this specification mean that there is an existence of a feature, number, step, process, operation, component, part, or combination thereof, and should be understood as not excluding the existence or addition of one or more other features, numbers, steps, processes, operations, components, parts, or combinations thereof.

[0033] Furthermore, terms such as top, bottom, upper surface, lower surface, or upper, lower, upper side, lower side, front and back, left and right, etc., used in this invention are used for convenience to distinguish the relative positions of each component. For example, the upper part of a drawing may be named or referred to as the upper part and the lower part as the lower part, and the length direction may be named or referred to as the front-back direction and the width direction as the left-right direction.

[0034] In addition, terms such as "first," "second," etc. used in the present invention may be used to describe various components. That is, terms such as "first," "second," etc. may be used solely for the purpose of distinguishing one component from another.

[0035] [Best mode for carrying out the invention]

[0036] As illustrated in FIGS. 2 to 6, the insulation cover for the low-voltage bushing terminal of a pole-mounted transformer according to an embodiment of the present invention covers and protects the low-voltage bushing (4) exposed outside the outer casing (1) of the pole-mounted transformer and prevents electric shock accidents caused by contact with external objects during live-line proximity work on a power pole. The main elements constituting the cover include a holder part (100) and first and second cap parts (200) (300).

[0037] Holder part (100) The base (110) and the elastic plate (120) are integrally formed to stably mount the low-pressure bushing (4) exposed on the outside of the outer casing (1) of the main transformer.

[0038] The base (110) is formed in a ring shape or tubular shape to surround the outer circumference of the low-pressure bushing (4) exposed outside the outer casing (1) of the pole-mounted transformer at regular intervals.

[0039] And on the inner edge surface of the edge surface of the base (110) that faces the opening edge surface of the first and second cap parts (200) (300), a first fitting projection (111) is formed integrally by protruding to be pressed into the interior of the first and second cap parts (200) (300) for close coupling.

[0040] In addition, first and second locking jaws (131) and (132) are formed protrudingly on both sides of the outer surface of the base (110).

[0041] Here, the cross-sectional shape of the base (110) is preferably formed in an elliptical shape to accommodate the clamp terminal and clamp bolt located on the outer bushing of the low-pressure bushing (4) exposed outside the enclosure (1) of the pole-mounted transformer, that is, at the outer end of the central conductor.

[0042] In addition, it is preferable to form an incision (112) at regular intervals on one side or part of the first fitting projection (111) so that elastic deformation action occurs smoothly.

[0043] A plurality of elastic plates (120) are formed radially around the inner circumference of the hollow of the base (110) so that they are elastically deformed by elasticity when subjected to external force and adhere to the outer circumference of the low-pressure bushing (4).

[0044] That is, the elastic plate (120) has a through hole (121) in the center through which the low-voltage bushing (4) of the main transformer passes, and additionally, the elastic plate (120) is divided into multiple parts by multiple slits (122) formed radially from the through hole (121).

[0045] In addition, the elastic plate (120) is formed in a shape that gradually narrows toward the through hole (121), that is, toward each free end, so that elastic deformation is performed smoothly and freely and it adheres naturally and flexibly to the outer perimeter of the low-pressure bushing (4).

[0046] And between the inner circumference of the base (110) and the outer circumference of the elastic plate (120), a rib (123) is formed integrally by protruding to increase the restoring force that attempts to return to the original state when the elastic plate (120) undergoes elastic deformation and to strengthen the elastic force.

[0047] Here, the through hole (121) is formed eccentrically to one side from the center of the elastic plate (120), thereby allowing the clamp terminal and clamp bolt that protrude long to one side from the end of the center conductor of the low-pressure bushing (4) to be easily and stably accommodated.

[0048] In addition, the sizes of the elastic plates (120) can be formed differently due to the through holes (121).

[0049] For example, the free ends of the elastic plates (120) are formed in a shape that gradually narrows toward the through hole (121), so that each of them can individually contact the low-pressure bushing (4) of the pole-mounted transformer and naturally bend and stably adhere even with a small external force.

[0050] First cap section (200) It is formed in a semi-cylindrical shape having an empty space inside so as to cover and close half of the outer circumference of the low-pressure bushing (4), which is partially exposed in the holder part (100), with a certain space (gap).

[0051] And the cross-sectional shape of the first cap part (200) is formed in a semi-elliptical shape to securely cover the clamp terminal and clamp bolt of the low-pressure bushing (4).

[0052] In addition, a first locking ring (210) is integrally formed protruding from one edge of the first cap portion (200) so that it can be locked by hooking it onto the first locking jaw (131) to maintain a closed state in which one side of the first cap portion (200) comes into contact with half edge of the holder portion (100).

[0053] And on the side of the first cap part (200), a first down line hole (220) is formed so that the secondary down line (W) of the pole-mounted transformer can pass upward, and a first wire holder (221) is integrally formed around the first down line hole (220) to hold the secondary down line (W) of the pole-mounted transformer without shaking.

[0054] In addition, a third locking jaw (230) is integrally formed protruding from one side of the first cap portion (200), and a third locking ring (240) is integrally formed protruding from the side opposite to the third locking jaw (230).

[0055] And, among the edge surfaces where the first cap part (200) and the second cap part (300) come into contact with each other, a fitting groove (250) is formed on the edge surface of the first cap part (200).

[0056] 2nd cap part (300) It is formed in a semi-cylindrical shape having an empty space inside so as to cover and close the other half of the outer circumference of the low-pressure bushing (4), which is partially exposed in the holder part (100), with a certain space (gap).

[0057] And the cross-sectional shape of the first cap part (200) is formed in a semi-elliptical shape to securely cover the clamp terminal and clamp bolt of the low-pressure bushing (4).

[0058] In addition, a second locking ring (310) is integrally formed protruding from one edge of the second cap portion (300) so that it can be locked by hooking it onto the second locking jaw (132) to maintain a closed state in which one side of the second cap portion (300) comes into contact with the other half edge of the holder portion (100).

[0059] And on the side of the second cap part (300), a second down line hole (320) is formed so that the secondary down line (W) of the pole-mounted transformer can pass downward, and a second wire holder (321) is integrally formed around the second down line hole (320) to hold the secondary down line (W) of the pole-mounted transformer without shaking.

[0060] In addition, the second cap part (300) is connected to the first cap part (200) at one end by a hinge line (330).

[0061] That is, the second cap portion (300) has a certain length and is formed to naturally open to one side and close by contacting half the edge of the holder portion (100) with a hinge line (330) that folds and unfolds by external force.

[0062] And on one side of the second cap part (300), a fourth locking ring (350) is integrally formed to protrude so as to be hooked onto the third locking jaw (230), and on the side opposite to the fourth locking ring (350), a fourth locking jaw (340) is integrally formed to protrude.

[0063] That is, on one edge facing each other of the first cap part (200) and the second cap part (300), third and fourth locking jaws (230) (340) and third and fourth locking rings (240) (350) are attached in corresponding shapes to ensure that the opening and closing are done quickly and easily while maintaining a secure closed state.

[0064] In addition, a second fitting projection (360) is integrally formed on the edge surface of the second cap part (300) corresponding to the fitting groove (250) of the first cap part (200) to be pressed into the fitting groove (250) and tightly coupled.

[0065] Here, it is preferable that the holder part (100) and the first and second cap parts (200) (300) be integrally formed using a thermoplastic elastomer having excellent wear resistance and heat resistance, as well as insulation and elasticity, such as TPE (Thermo Plastic Elastomer).

[0066] In addition, it goes without saying that it can also be integrally formed using elastic soft plastic synthetic resins such as high-density polyethylene (HDPEE), PE, PP, PU, ​​and PVC, or synthetic rubber materials such as urethane rubber, NBR, and silicone.

[0067] [Operating Principle and Function]

[0068] The insulation cover for the low-voltage bushing terminal of a pole-mounted transformer according to an embodiment of the present invention configured as described above can be easily attached to cover the low-voltage bushing (4) protruding from the surface of the outer casing (1) of the pole-mounted transformer, thereby safely protecting it from external contact and impact, and preventing electric shock accidents caused by contact with external objects during live-line proximity work on a power pole.

[0069] That is, as shown in FIG. 6, the holder part (100) can be attached to the low-pressure bushing (4) exposed on the outside of the outer casing (1) of the pole-mounted transformer, and in this process, the elastic plates (120) of the holder part (100) naturally and flexibly bend outward in correspondence with the circumference of the outer casing of the low-pressure bushing (4), so that it can be universally applied and attached regardless of the outer casing of the low-pressure bushing (4) having various sizes and shapes.

[0070] In addition, the first and second cap parts (200) (300) are joined to the base (110) of the holder part (100) by a press-fit method, and the first cap part (300) and the second cap part (300) are joined so that their mutually facing surfaces come into contact, thereby covering the outer circumference of the low-pressure bushing (4) that is partially exposed in the holder part (100) so as to completely cover it.

[0071] In this state, the first and second locking rings (210) (310) attached to the first and second cap parts (200) (300) are respectively inserted into the first and second locking jaws (131) (132) of the holder part (100) and hooked to lock them, thereby stably maintaining the closed state of the first and second cap parts (200) (300).

[0072] In this way, even if the low-voltage bushing (4) collides with an adjacent pole-mounted transformer during transportation, storage, or installation of the pole-mounted transformer, the first and second cap parts (200) (300) can naturally absorb and mitigate the impact force.

[0073] In other words, not only is mechanical wear caused by friction of the low-pressure bushing (4) or damage caused by impact prevented, but scratches such as peeling off the coating layer of the outer casing can also be prevented when the clamp terminal or clamp bolt of the low-pressure bushing (4) collides with other adjacent pole-mounted transformers during transport and storage.

[0074] Furthermore, by completely covering and wrapping the terminals of the low-pressure bushing (4), it is possible to prevent electric shock accidents caused by contact with external objects by the worker during live-line work, as well as prevent the phenomenon of falling off due to wind or contact with external objects.

[0075] In addition, it is possible to prevent a worker from being injured by accidentally bumping into the outer protruding parts of the pole transformer enclosure (1), such as the clamp terminal and clamp bolt of the low-pressure bushing (4).

[0076] Furthermore, the work of ramping pole-mounted transformers with vinyl film can be omitted or reduced, thereby preventing environmental pollution caused by the discharge of vinyl film that must be disposed of or incinerated after a single use.

[0077] Meanwhile, it is obvious to those skilled in the art that the present invention is not limited by the embodiments described above and the attached drawings, and that it can be modified and applied in various ways not exemplified within the scope of the technical concept of the present invention, as well as widely applied by substituting each component and changing to equivalent alternative embodiments.

[0078] Therefore, content related to modifying and applying the technical features of the present invention should be interpreted as being included within the technical concept and scope of the present invention. Explanation of the symbols

[0079] 100: Holder part 110: Base 111: First insertion projection 112: Incision 120: Elastic plate 121: Through hole 122: Slit 123: Rib 131: First locking jaw 132: Second locking jaw 200: 1st cap part 210: 1st locking ring 220: First wire drop hole 221: First wire holder 230: Third locking jaw 240: Third locking hook 250: Insertion groove 300: Second cap part 310: Second locking ring 320: Second lowering hole 321: Second wire holder 330: Hinge line 340: 4th locking jaw 350: 4th locking hook 360: Second insertion projection

Claims

Claim 1 A tubular base is formed to surround the outer circumference of a low-pressure bushing exposed on the exterior of the enclosure of a pole-mounted transformer, and a plurality of elastic plates are formed radially arranged on the inner circumference of the hollow of the base, which deform elastically by elasticity when subjected to external force and adhere to the circumference of the bushing of the low-pressure bushing, and a holder part having first and second locking tabs protruding from both sides of the outer surface of the base; a first cap part is formed as a hollow semi-cylindrical shape to cover and conceal half of the outer circumference of the low-pressure bushing, and a first locking hook is formed protruding from one edge so that it can be locked by hooking onto the first locking tab to maintain a closed state where one side contacts the half edge of the holder part, and a first down line hole is formed to allow the secondary down line of the pole-mounted transformer to pass through. and a second cap part formed as a hollow semi-cylindrical shape to cover and conceal the other half of the outer circumference of the low-pressure bushing, a second locking hook protruding from one edge so as to be locked by hooking onto the second locking projection to maintain a closed state where one side contacts the other half edge of the holder part, a second down line hole formed to allow the secondary down line of the pole-mounted transformer to pass through, and one side of the second cap part is connected to the first cap part by a hinge line so as to open to one side centered on the hinge line and close so that the surface facing the first cap part contacts;It includes, wherein a first fitting projection is formed protrudingly on the inner edge surface of the base facing the edge surfaces of the first and second cap parts to be pressed into the inner edge of the first and second cap parts for tight coupling, and a rib is formed protrudingly between the inner circumference of the base and the outer circumference of the elastic plate to increase the restoring force attempting to return to the original state upon elastic deformation of the elastic plate and to strengthen the elastic force, the cross-sectional shape of the base and the cross-sectional shape of the first and second cap parts are formed as ellipses, a third locking projection is formed protrudingly on one side of the first cap part, a third locking hook is formed on the side opposite the third locking projection, a fourth locking hook is formed on one side of the second cap part to be locked by hooking onto the third locking projection, a fourth locking projection is formed protrudingly on the side opposite the fourth locking hook, a fitting groove is formed on the edge surface of the first cap part among the edge surfaces where the first cap part and the second cap part come into contact with each other, and in the fitting groove A low-voltage bushing terminal insulation cover for a pole-mounted transformer, characterized in that a second fitting projection is formed protruding from the edge surface of the corresponding second cap portion to press-fit into the fitting groove for close coupling, and the first and second cap portions rotate around the hinge line while separated from the holder portion to accommodate a part of the holder portion inside and are coupled.

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