Ground transformer low-voltage protective apparatus attached to enclosure body

Abstract

A protective device for a low-voltage ground transformer is provided to prevent electric shock accidents in which electricity is passed from the enclosure body of the ground transformer to a user. The protective device includes i) an insulating blanket formed of an insulating material attached to the outer surface of the enclosure body to prevent current flow from the enclosure body to a plurality of low-voltage terminals of the ground transformer, and ii) a magnetic body that provides magnetic force to attach the insulating blanket in close contact with the outer surface of the enclosure body.

Description

Technology Field

[0001] The present invention relates to a protective device for a low-voltage ground transformer. More specifically, it relates to a protective device for a low-voltage ground transformer capable of preventing electric shock accidents caused by electricity flowing from the enclosure body of the ground transformer. Background Technology

[0002] The user performs the task of connecting and disconnecting the secondary low-voltage cables inside the ground transformer using tools such as metal wrenches. When performing this task, if the user's hand or the metal tool comes into contact with the enclosure body, electricity may flow from the enclosure body to the user, causing an electric shock accident. In other words, electricity may flow from the secondary terminals of the ground transformer through the enclosure body to the user's hand or the metal tool.

[0003] Therefore, there is a need for a device that can prevent electricity from flowing from the enclosure body to the user when the user performs work inside the ground transformer. Prior art literature

[0004] Korean Registered Patent No. 1,563,181 The problem to be solved

[0005] The present invention aims to provide a protective device for low-voltage ground transformers, wherein an insulating blanket formed of an insulating material and having low-voltage terminal holes can be attached to an enclosure body using a magnetic material. means of solving the problem

[0006] A protective device for low voltage of a ground transformer according to one embodiment of the present invention can prevent electric shock accidents in which electricity is passed from the enclosure body of a ground transformer to a user. The protective device includes i) an insulating blanket formed of an insulating material attached to the outer surface of the enclosure body to prevent current flow from the enclosure body to a plurality of low voltage terminals of the ground transformer, and ii) a magnetic body that provides magnetic force to attach the insulating blanket in close contact with the outer surface of the enclosure body.

[0007] In the insulating blanket, a plurality of low-voltage terminal holes are formed that correspond to the positions of a plurality of low-voltage terminals and through which a plurality of low-voltage terminals pass.

[0008] The low-voltage terminal hole includes i) a first low-voltage terminal hole through which the first low-voltage terminal of the ground transformer passes, ii) a second low-voltage terminal hole through which the second low-voltage terminal of the ground transformer passes and which is spaced apart upward in an inclined direction from the first low-voltage terminal hole, iii) a third low-voltage terminal hole through which the third low-voltage terminal of the ground transformer passes and which is spaced apart horizontally from the first low-voltage terminal hole, and iv) a fourth low-voltage terminal hole through which the fourth low-voltage terminal of the ground transformer passes and which is spaced apart horizontally from the second low-voltage terminal hole.

[0009] A protective device for low-voltage ground transformers according to one embodiment of the present invention further includes a ring-shaped cover member that surrounds the inner surface of an insulating blanket forming a low-voltage terminal hole. A fastening hole is formed in the cover member into which the inner surface of the insulating blanket forming the low-voltage terminal hole is inserted. A low-voltage terminal passes through the interior of the cover member.

[0010] A protective device for low-voltage ground transformers according to one embodiment of the present invention further includes a cover member that surrounds the inner surface of an insulating blanket forming a low-voltage terminal hole. The cover member has a ring shape with a portion cut out. A fastening hole is formed in the cover member into which the inner surface of the insulating blanket forming the low-voltage terminal hole is inserted. A low-voltage terminal passes through the interior of the cover member.

[0011] An insertion hole penetrating the insulating blanket is formed to allow a magnetic material to be inserted. The insertion hole is formed such that its diameter decreases from the outer surface of the insulating blanket toward the inner surface. The magnetic material is formed such that its diameter decreases from one end to the other end to correspond to the insertion hole. The other end of the magnetic material contacts the outer surface of the enclosure body.

[0012] The insulating blanket has an insertion hole penetrating it to allow the insertion of a magnetic material, and a stepped portion is formed on which the magnetic material is seated. One end of the stepped portion corresponds to the diameter of the magnetic material. The other end of the stepped portion is smaller than the diameter of the magnetic material. Effects of the invention

[0013] An insulating blanket, formed from an insulating material such as rubber and having low-voltage terminal holes, can be attached to the outer surface of the enclosure body using a magnetic material. This prevents electric shock accidents caused by electricity flowing from the enclosure body to the user when the user connects or disconnects low-voltage cables inside the ground transformer. A warning label can be attached to the insulating blanket to notify the user that caution is required during operation. Brief explanation of the drawing

[0014] FIG. 1 is a perspective view of a protective device according to one embodiment of the present invention. Figure 2 is a diagram showing the configuration of the protective device of Figure 1. Figure 3 is a drawing showing a ring-shaped cover member of the protective device of Figure 1. FIG. 4 is a drawing showing a ring-shaped cover member with a part of the protective device of FIG. 1 cut out. Figure 5 is a drawing showing the insulating blanket and magnetic body of the protective device of Figure 2. FIG. 6 is a drawing showing an insulating blanket and a magnetic body having a stepped portion formed in the protective device of FIG. 2. Figure 7 is a drawing showing a cable penetrating the protective device of Figure 1. Specific details for implementing the invention

[0015] The technical terms used herein are for the reference of specific embodiments only and are not intended to limit the invention. The singular forms used herein include plural forms unless phrases clearly indicate otherwise. The meaning of "comprising" as used in the specification specifies a particular characteristic, area, integer, step, action, element, and / or component, and does not exclude the presence or addition of other particular characteristic, area, integer, step, action, element, component, and / or group.

[0016] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as generally understood by those skilled in the art to which this invention pertains. Terms defined in commonly used dictionaries are further interpreted to have meanings consistent with relevant technical literature and the present disclosure, and are not interpreted in an ideal or highly formal sense unless otherwise defined. For example, the term "applied" described below is interpreted to include both the state in which it is appropriately used and the state prior to appropriate use.

[0017] Expressions described in the singular in this specification may be interpreted as singular or plural unless explicit expressions such as "one" or "single" are used.

[0018] In this specification, terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present disclosure, the first component may be named the second component, and similarly, the second component may be named the first component.

[0019] In the flowchart described with reference to the drawings in this specification, the order of operations may be changed, several operations may be merged or some operations may be divided, and certain operations may not be performed.

[0020] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0021] FIGS. 1 and 2 are schematic perspective views of a protective device (100) for low voltage of a ground transformer (T) according to an embodiment of the present invention (hereinafter referred to as the protective device (100)). Specifically, FIG. 1 shows a protective device (100) attached to the enclosure body (Ta) of a ground transformer (T), and FIG. 2 shows the configuration of the protective device (100). The protective device (100) of FIGS. 1 and 2 is merely for illustrating the present invention and is not limited thereto. Accordingly, it may be modified differently.

[0022] As illustrated in FIG. 1, a protective device (100) is attached to the outer surface of an enclosure body (Ta) to prevent electricity from being passed to the user from the enclosure body (Ta) which is connected to a plurality of low-voltage terminals (Ts) of a ground transformer (T). For example, when a user is performing the task of connecting or disconnecting a low-voltage cable (C) inside the ground transformer (T), if the user's hand or a metal tool comes into contact with the enclosure body (Ta), electricity may be passed to the user from the enclosure body (Ta), causing an electric shock accident. Therefore, the protective device (100) can be attached to the outer surface of the enclosure body (Ta) to prevent an electric shock accident to the user.

[0023] As illustrated in FIG. 2, the protective device (100) includes an insulating blanket (110), a magnetic body (120), and a cover member (130) (Fig. 3). The insulating blanket (110) is attached to the outer surface of the enclosure body (Ta) and is formed of an insulating material, such as rubber, that does not conduct electricity or heat. Therefore, when a user connects or disconnects a low-voltage cable (C) inside a ground transformer (T), the insulating blanket (110) made of insulating material prevents electricity from flowing to the user from the outer surface of the enclosure body (Ta). A sticker or similar item with a warning message, such as "Caution: Electric Shock," may be attached to the outer surface of the insulating blanket (110).

[0024] In the insulating blanket (110), a plurality of low-voltage terminal holes (111) are formed corresponding to the positions of a plurality of low-voltage terminals (Ts) and through which a plurality of low-voltage terminals (Ts) pass. A plurality of low-voltage terminals (Ts) or cables (C) can pass through and be connected via these low-voltage terminal holes (111). The low-voltage terminal holes (111) include a first low-voltage terminal hole (111a), a second low-voltage terminal hole (111b), a third low-voltage terminal hole (111c), and a fourth low-voltage terminal hole (111d).

[0025] The first low-voltage terminal hole (111a) is penetrated by the first low-voltage terminal (Ts1) of the ground transformer (T). The second low-voltage terminal hole (111b) is penetrated by the second low-voltage terminal (Ts2) of the ground transformer (T) and is positioned spaced apart upward in an inclined direction from the first low-voltage terminal hole (111a).

[0026] The third low-voltage terminal hole (111c) is penetrated by the third low-voltage terminal (Ts3) of the ground transformer (T) and is positioned spaced apart horizontally from the first low-voltage terminal hole (111a). Additionally, the third low-voltage terminal hole (111c) is positioned spaced downward in an inclined direction from the second low-voltage terminal hole (111b).

[0027] The fourth low-voltage terminal hole (111d) is penetrated by the fourth low-voltage terminal (Ts4) of the ground transformer (T) and is positioned spaced apart horizontally from the second low-voltage terminal hole (111b). Additionally, the fourth low-voltage terminal hole (111d) is positioned spaced upward in an inclined direction from the third low-voltage terminal hole (111c).

[0028] For example, the second low-voltage terminal hole (111b) is located 130mm above the first low-voltage terminal hole (111a), and the second low-voltage terminal hole (111b) is spaced horizontally 90mm to 100mm to the right from the first low-voltage terminal hole (111a).

[0029] The third low-voltage terminal hole (111c) is located 130mm below the second low-voltage terminal hole (111b), and the third low-voltage terminal hole (111c) is spaced 90mm to 100mm to the right horizontally from the second low-voltage terminal hole (111b).

[0030] The fourth low-voltage terminal hole (111d) is located 130mm above the third low-voltage terminal hole (111c), and the fourth low-voltage terminal hole (111d) is spaced 90mm to 100mm to the right horizontally from the third low-voltage terminal hole (111c).

[0031] As illustrated in FIG. 2, the magnetic body (120) provides magnetic force to attach the insulating blanket (110) to the outer surface of the enclosure body (Ta) in close contact. The magnetic body (120) can be attached to the upper outer surface of the insulating blanket (110). The magnetic body (120) is formed in a polygonal shape that extends in the longitudinal direction.

[0032] FIGS. 3 and FIGS. 4 illustrate a cover member (130) of a protective device (100). Specifically, FIG. 3 illustrates a ring-shaped cover member (130), and FIG. 4 illustrates a ring-shaped cover member (130) with a portion cut out. The protective device (100) of FIGS. 3 and FIG. 4 is merely for illustrating the present invention and is not limited thereto. Therefore, it can be modified differently.

[0033] As illustrated in FIG. 3, the cover member (130) is formed in a ring shape to surround the inner surface of the insulating blanket (110) that forms the low-voltage terminal hole (111). The cover member (130) has a fastening hole (131) into which the inner surface of the insulating blanket (110) that forms the low-voltage terminal hole (111) is inserted. That is, the inner surface of the insulating blanket (110) that forms the low-voltage terminal hole (111) is inserted into the fastening hole (131) of the cover member (130). A low-voltage terminal (Ts) passes through the interior of the cover member (130). The cover member (130) may be formed from a flexible plastic material having insulating properties. By means of the cover member (130), damage to the inner surface of the insulating blanket (110) forming the low-pressure terminal hole (111) through which the low-pressure terminal (Ts) passes can be prevented.

[0034] As illustrated in FIG. 4, the cover member (130) wraps around the inner surface of the insulating blanket (110) that forms the low-voltage terminal hole (111). The cover member (130) has a fastening hole (131) into which the inner surface of the insulating blanket (110) that forms the low-voltage terminal hole (111) is inserted. That is, the inner surface of the insulating blanket (110) that forms the low-voltage terminal hole (111) is inserted into the fastening hole (131) of the cover member (130). The low-voltage terminal (Ts) passes through the interior of the cover member (130). The cover member (130) may be formed of a flexible plastic material having insulating properties.

[0035] The cover member (130) has a ring shape with a cut-out lower portion. That is, the cover member (130) extends from one end to the other end to form a circular shape, and the one end and the other end are separated from each other. In other words, the cut-out ring-shaped cover member (130) made of plastic material can contract to decrease or increase its diameter, or return to its original state. Therefore, even if there is a slight difference in the diameter of the multiple low-pressure terminal holes (111) of the insulating blanket (110), the cover member (130), which has the property of contracting or returning to its original state, can be fastened to the inner surface of the insulating blanket (110) that forms the low-pressure terminal holes (111). In addition, damage to the inner surface of the insulating blanket (110) that forms the low-pressure terminal holes (111) through which the low-pressure terminal (Ts) passes can be prevented by the cover member (130).

[0036] FIG. 5 is a schematic diagram showing an insulating blanket (110) and a magnetic body (120) of a protective device (100). Specifically, FIG. 5 shows an insulating blanket (110) with a hole formed therein through which the magnetic body (120) passes. The protective device (100) of FIG. 5 is merely for illustrating the present invention and is not limited thereto. Therefore, it can be modified differently.

[0037] As shown in FIG. 5, an insertion hole (112) is formed through the insulating blanket (110) so that a magnetic body (120) is inserted into the insulating blanket (110). The insertion hole (112) is formed such that its diameter decreases from the outer surface (right side of FIG. 5) to the inner surface (left side of FIG. 5) of the insulating blanket (110).

[0038] The magnetic body (120) is formed such that its diameter decreases from one end (the middle part of FIG. 5) to the other end (the left end of FIG. 5) so as to correspond to the insertion hole (112). Additionally, the other end of the magnetic body (120) comes into contact with the outer surface of the outer body (Ta). Thus, the magnetic body (120) inserted into the insertion hole (112) of the insulating blanket (110) is attached so as to come into direct contact with the outer surface of the outer body (Ta), allowing the insulating blanket (110) to be attached more strongly to the outer body (Ta).

[0039] FIG. 6 is a schematic diagram showing an insulating blanket (110) and a magnetic body (120) of a protective device (100). Specifically, FIG. 6 shows an insulating blanket (110) with a hole formed therein into which a magnetic body (120) is inserted. The protective device (100) of FIG. 6 is merely for illustrating the present invention and is not limited thereto. Therefore, it can be modified differently.

[0040] As shown in FIG. 6, an insertion hole (112) is formed through the insulating blanket (110) so that a magnetic body (120) is inserted into it, and a stepped portion (113) is formed so that the magnetic body (120) is seated.

[0041] One end of the stepped portion (113) (right end in FIG. 6) corresponds to the diameter of the magnetic body (120), and the other end of the stepped portion (113) (left end in FIG. 6) is formed to be smaller than the diameter of the magnetic body (120). That is, the magnetic body (120) can be seated on the stepped portion (113) at a predetermined distance from the outer body (Ta). As the magnetic body (120) is seated on the stepped portion (113) of the insulating blanket (110), the distance between the magnetic body (120) and the outer surface of the outer body (Ta) is reduced compared to when the magnetic body (120) is attached to the outer surface of the insulating blanket (110). Therefore, the distance between the magnetic body (120) and the outer surface of the outer body (Ta) is reduced, allowing the insulating blanket (110) to be attached more strongly to the outer body (Ta).

[0042] FIG. 7 shows the protective device (100) of FIG. 2 attached to the enclosure body (Ta) of a ground transformer (T). That is, FIG. 2 shows a plurality of cables (C) passing through the low-voltage terminal hole (111) of an insulating blanket (110). The protective device (100) of FIG. 7 is merely for illustrating the present invention and is not limited thereto. Therefore, it can be modified differently.

[0043] As illustrated in FIG. 7, the protective device (100) is attached to the enclosure body (Ta) of the ground transformer (T). Each of the multiple low-voltage terminal holes (111) of the insulating blanket (110) is connected to a terminal inside the enclosure body (Ta) so that multiple cables (C) can pass through them. In this way, not only the low-voltage terminals (Ts) but also the cables (C) can pass through the low-voltage terminal holes (111) of the insulating blanket (110).

[0044] Although the present invention has been described as previously stated, those skilled in the art will readily understand that various modifications and variations are possible without departing from the concept and scope of the claims set forth below. Explanation of the symbols

[0045] 100. Protective device 110. Insulation Blanket 111. Low voltage terminal hole 111a. First low-voltage terminal hole 111b. Second low-voltage terminal hole 111c. Third low-voltage terminal hole 111d. 4th low-voltage terminal hole 112. Insertion hole 113. Step 120. Magnetic material 130. Cover member 131. Fastening hole C. Cable T. Ground transformer Ta. Outer shell body Ts. Low voltage terminal Ts1. First low-voltage terminal Ts2. Second low-voltage terminal Ts3. Third low-voltage terminal Ts4. 4th low-voltage terminal

Claims

Claim 1 The invention includes an insulating blanket formed of an insulating material attached to the outer surface of an enclosure body to prevent current flow from the enclosure body to a plurality of low-voltage terminals of a ground transformer, and a magnetic body providing magnetic force to attach the insulating blanket in close contact with the outer surface of the enclosure body, wherein the insulating blanket has a plurality of low-voltage terminal holes formed therein that correspond to the positions of the plurality of low-voltage terminals and through which the plurality of low-voltage terminals pass, and the low-voltage terminal holes include a first low-voltage terminal hole through which a first low-voltage terminal of the ground transformer passes, a second low-voltage terminal hole through which a second low-voltage terminal of the ground transformer passes and is spaced upward in an inclined direction from the first low-voltage terminal hole, a third low-voltage terminal hole through which a third low-voltage terminal of the ground transformer passes and is spaced horizontally from the first low-voltage terminal hole, and a fourth low-voltage terminal of the ground transformer passes through, and the second low-voltage terminal hole and A protective device for a ground transformer low voltage, comprising a fourth low-voltage terminal hole spaced apart in a horizontal direction, and further comprising a cover member that surrounds the inner surface of the insulating blanket forming the low-voltage terminal hole, wherein the insulating blanket has an insertion hole formed through the insulating blanket to allow the magnetic body to be inserted, wherein the insertion hole is formed such that its diameter decreases from the outer surface of the insulating blanket to the inner surface, and the magnetic body is formed such that its diameter decreases from one end to the other end to correspond to the insertion hole, and the other end of the magnetic body contacts the outer surface of the enclosure body. Claim 2 A protective device for low voltage of a ground transformer according to claim 1, wherein the third low voltage terminal hole is spaced downward in an inclined direction from the second low voltage terminal hole, and the fourth low voltage terminal hole is spaced upward in an inclined direction from the third low voltage terminal hole.

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