Fuse of terminal type and method of using thereof

Abstract

The present invention relates to a terminal-type fuse and a method of connecting the same. The terminal-type fuse may include a fuse that cuts off an overcurrent occurring in a low-voltage cable connected to a ground transformer, a plurality of terminal connecting parts connected to both ends of the fuse and connected to the low-voltage cable and the low-voltage terminal part of the ground transformer, respectively, and an insulating cover that forms an empty space inside and into which at least one of the plurality of terminal connecting parts is inserted. Among the plurality of terminal connecting parts, a first terminal connecting part may be connected to a copper pipe terminal of the low-voltage terminal part, and among the plurality of terminal connecting parts, a second terminal connecting part may be connected to a cable connecting part of the low-voltage cable.

Description

Technology Field

[0001] The present invention relates to a terminal type fuse and a method of fastening the same, and more specifically, to a terminal fuse and a method of fastening the same that facilitates easy detachment of a low-voltage terminal part of a ground transformer and a low-voltage cable. Background Technology

[0002] In the event of a fault or overload in the underground cable, the primary fuse in the ground transformer of phases A, B, and C may operate. Due to the operation of the primary fuse, not only the faulty or overloaded cable but also the customers supplied by phases A, B, and C may experience a power outage. After the primary fuse operates, the fault section of the ground transformer can be identified using a simple inspection method, but locating the fault section may take approximately 20 minutes to 1 hour. Furthermore, when the protective device on the primary side of the ground transformer (e.g., a switch-type bayonet fuse) is overloaded, complete interruption may not be possible, which may cause the ground transformer to fail. In such cases, replacement of the ground transformer is unavoidable.

[0003] To resolve the aforementioned issues, distribution boxes can be installed to prevent failures in underground cables; however, this presents the problem of requiring installation space. In particular, securing installation space in densely populated areas such as cities is practically impossible due to procedures such as obtaining permits from local governments. Furthermore, the production of conventional underground fuses used for low-voltage cables has been discontinued due to a lack of demand. Therefore, there is a need for fuses that are convenient for on-site use and improve ease of installation in the event of a failure. The problem to be solved

[0005] The problem that the present invention aims to solve is to provide a terminal-type fuse and a method for connecting the same that solves the problems of the aforementioned prior art.

[0006] The present invention provides a terminal terminal type fuse connected to a low-voltage terminal section of a ground transformer and a low-voltage cable to cut off overcurrent, and a method for connecting the same.

[0007] In addition, the present invention provides a terminal-type fuse that facilitates the easy attachment and detachment of a low-voltage cable and a method for connecting the same.

[0008] The problems of the present invention are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0010] In order to solve the above technical problem, a terminal type fuse according to one embodiment of the present invention may include a fuse that cuts off an overcurrent occurring in a low-voltage cable connected to a ground transformer, a plurality of terminal connecting parts connected to both ends of the fuse and respectively connected to the low-voltage cable and the low-voltage terminal part of the ground transformer, and an insulating cover that forms an empty space inside and into which at least one of the plurality of terminal connecting parts is inserted inside, wherein among the plurality of terminal connecting parts, a first terminal connecting part may be connected to a copper pipe terminal of the low-voltage terminal part, and among the plurality of terminal connecting parts, a second terminal connecting part may be connected to a cable connecting part of the low-voltage cable.

[0011] In one embodiment, the plurality of terminal fastening portions may have at least one through hole on a plate shape.

[0012] In one embodiment, the plurality of terminal fastening portions can be fastened to each of the copper tube terminal and the cable fastening portion by inserting a fastening member into the through hole.

[0013] In one embodiment, the fastening member may include a bolt.

[0014] In one embodiment, the plurality of terminal connecting parts may be manufactured from copper material.

[0015] In one embodiment, the insulating cover is formed with both ends open, and the second terminal fastening part and the cable fastening part fastened by the fastening member can be inserted through the open end.

[0016] In order to solve the above technical problem, in a method for connecting a low-voltage terminal portion of a ground transformer and a low-voltage cable and a terminal-type fuse according to another embodiment of the present invention, the terminal-type fuse may include a fuse, a plurality of terminal connecting portions, and an insulating cover, and may include the steps of connecting a copper pipe terminal of the low-voltage terminal portion and a first terminal connecting portion among the plurality of terminal connecting portions using a connecting member, connecting a cable connecting portion of the low-voltage cable and a second terminal connecting portion among the plurality of terminal connecting portions using the connecting member, and inserting the connected second terminal connecting portion and the cable connecting portion into the interior of the insulating cover.

[0017] In another embodiment, the fastening member may include a bolt.

[0018] In another embodiment, the insulating cover may be formed with both ends open, and the second terminal fastening part and the cable fastening part fastened by the fastening member may be inserted through the open end. Effects of the invention

[0020] According to the terminal terminal type fuse and the method of connecting the same of the present invention, one or more of the following effects are provided.

[0021] First, according to the present invention, the convenience of installation for attaching and detaching low-voltage cables can be improved, and installation time and labor can be reduced.

[0022] In addition, according to the present invention, reliability can be improved by preventing cascading power outages caused by overload, short-circuit failure, etc. of customer-side equipment.

[0023] In addition, according to the present invention, the underground low-voltage service line (CV cable) can be protected by using a fuse in the service line, just like in an overhead line. Brief explanation of the drawing

[0025] Figure 1 is an example of a low-voltage cable connected to a conventional low-voltage terminal. FIG. 2 is a drawing illustrating a terminal type fuse according to an embodiment of the present invention. FIGS. 3a to 3d are examples of a method for fastening a terminal-type fuse according to an embodiment of the present invention. FIG. 4 is a flowchart of a method for connecting a terminal-type fuse according to an embodiment of the present invention. Specific details for implementing the invention

[0026] The advantages and features of the disclosed invention, and the methods and apparatus for achieving them, will become clear by referring to the embodiments described below together with the accompanying drawings. However, the disclosed invention is not limited to the embodiments disclosed below but may be embodied in various different forms. The disclosed embodiments are provided merely to ensure that the disclosure of the disclosed invention is complete and to fully inform those skilled in the art of the scope of the invention, and the disclosed invention is defined only by the scope of the claims.

[0027] We will briefly explain the terms used in the disclosed specification and describe the disclosed invention in detail.

[0028] The terms used in the disclosed invention have been selected based on currently widely used general terms whenever possible, taking into account their functions within the disclosed invention; however, these terms may vary depending on the intent of those skilled in the art, case law, the emergence of new technologies, etc. Additionally, in specific cases, terms have been selected at the applicant's discretion, and in such instances, their meanings will be described in detail in the relevant description of the invention. Therefore, the terms used in the disclosed invention must be defined not merely by their names, but based on their meanings and the overall content of the disclosed invention.

[0029] When a part of a specification is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0030] The symbols attached to each step are used to identify each step and do not indicate the order of the steps relative to one another; the steps may be performed differently from the specified order unless a specific order is clearly indicated in the context.

[0031] In order to clearly explain the invention disclosed in the drawings, parts unrelated to the explanation are omitted. Additionally, identical reference numerals in the drawings indicate identical components, and redundant descriptions thereof are omitted.

[0032] Figure 1 is an example of a low-voltage cable (30) connected to a conventional low-voltage terminal (22).

[0033] Referring to FIG. 1, a ground transformer (1) can generally be composed of a high-voltage section and a low-voltage section. For example, the high-voltage section may include three detachable single-phase unit modules. Here, the low-voltage section has four low-voltage terminal sections (22) attached separately for phases A, B, C, and N, and a low-voltage cable (30) can be connected to the low-voltage terminal sections (22) through a cable connection section (32).

[0034] For example, the low-voltage terminal part (22) may include a copper pipe terminal (24), and the low-voltage cable (30) may include a cable connection part (32).

[0035] The copper pipe terminal (24) has a rectangular plate shape and has six through holes formed on its side that can be bolted. Meanwhile, the cable connection part (32) also has a rectangular plate shape and has two through holes formed on its side that can be bolted. Accordingly, the cable connection part (32) is bolted to the copper pipe terminal (24), so that a low-voltage cable (30) can be connected to the low-voltage terminal part (22).

[0036] The method of connecting the low-voltage cable (30) connected to the conventional low-voltage terminal (22) is a sleeve compression method. The sleeve compression method has the problem that the process of detaching the faulty low-voltage cable (30) from the low-voltage terminal (22) is cumbersome. For example, the copper pipe terminal (24) and the cable connection part of the faulty low-voltage cable are separated. Afterwards, the wire of the new low-voltage cable (30) is cut to expose the conductor, the conventional underground wire fuse and low-voltage cable (30) are sleeve-compressed, and insulating tape is applied. Afterwards, the cable connection part (32) can be connected to the copper pipe terminal (24).

[0037] The present invention proposes a terminal-type fuse (10) and a method for installing the same to solve the above-mentioned problems.

[0038] FIG. 2 is a drawing illustrating a terminal type fuse (10) according to an embodiment of the present invention.

[0039] Referring to FIG. 2, the terminal type fuse (10) may include a plurality of terminal connecting parts (100), a fuse (200), and an insulating cover (300).

[0040] A plurality of terminal connection parts (100) may be arranged and connected at both ends of a fuse (200). One of the plurality of terminal connection parts (100) may be connected to a low-voltage cable. Additionally, another of the plurality of terminal connection parts (100) may be connected to a low-voltage terminal of a ground transformer. For example, among the plurality of terminal connection parts (100), the first terminal connection part (100) may be connected to a copper pipe terminal of the low-voltage terminal. Additionally, among the plurality of terminal connection parts (100), the second terminal connection part (100) may be connected to a cable connection part of the low-voltage cable.

[0041] A plurality of terminal fastening portions (100) may have at least one through hole on a plate shape. For example, the plurality of terminal fastening portions (100) may have a shape corresponding to the shape of the copper pipe terminal and the through hole. The first terminal fastening portion (100) may be arranged to overlap on the side of the copper pipe terminal, and the first terminal fastening portion (100) may be aligned with the through hole of the copper pipe terminal. Subsequently, the first terminal fastening portion (100) may be fastened to the copper pipe terminal by inserting a fastening member into the through hole. Here, the fastening member may be a bolt. Meanwhile, the second terminal fastening portion (100) may be fastened in the same process as the cable terminal portion of the low-voltage cable. Here, the cable terminal portion may have the same or similar shape as the plurality of terminal fastening portions (100). However, this is merely an example, and the present disclosure is not limited thereto.

[0042] A plurality of terminal connection parts (100) can be manufactured from copper material, and can be manufactured from a material similar or identical to a copper tube terminal.

[0043] The low-voltage cable can be easily attached and detached by fastening the bolts of the multiple terminal connection parts (100).

[0044] The fuse (200) can interrupt overcurrent occurring in the low-voltage cable connected to the ground transformer. The fuse (200) can be attached to and connected to one end of each of the plurality of terminal connection parts (100). For example, one end of the fuse (200) can be connected to one end of the first terminal connection part (100), and the other end of the fuse (200) can be connected to one end of the second terminal connection part (100).

[0045] The insulating cover (300) may have an empty space inside and may be formed with both ends open. For example, the insulating cover (300) may have a cylindrical shape with an empty interior, but is not limited thereto.

[0046] At least one of a plurality of terminal fastening portions (100) may be inserted into the interior of the insulating cover (300). For example, a second terminal fastening portion (100) fastened by a fastening member may be inserted through an open end of the cable fastening portion insulating cover (300).

[0047] As described above, the terminal type fuse (10) according to the present invention can improve the convenience of installation for attaching and detaching low-voltage cables and can reduce installation time and labor.

[0048] In addition, the terminal type fuse (10) can improve reliability by preventing cascading power outages caused by overload, short circuit, etc. of the customer-side equipment.

[0049] In addition, the terminal type fuse (10) can protect the underground low-voltage service line (CV cable) by using a fuse in the service line, just like the overhead line.

[0050] FIGS. 3a to 3d are examples of a method for fastening a terminal-type fuse (10) according to an embodiment of the present invention, and FIG. 4 is a flowchart of a method for fastening a terminal-type fuse (10) according to an embodiment of the present invention.

[0051] Referring to FIG. 3a and FIG. 4, in step S410, the copper pipe terminal (24) of the low-pressure terminal section and the first terminal connecting section (100) among the plurality of terminal connecting sections can be connected using the connecting member (110).

[0052] For example, as illustrated in FIG. 3a, a plurality of terminal fastening parts (100) may have at least one through hole on a plate shape. For example, the plurality of terminal fastening parts (100) may have a shape according to the shape of the copper tube terminal (24) and the through hole. The first terminal fastening part (100) may be placed overlappingly on the side of the copper tube terminal (24), and the through hole of the first terminal fastening part (100) and the copper tube terminal (24) may be aligned. Subsequently, the first terminal fastening part (100) may be fastened to the copper tube terminal (24) by inserting a fastening member (110) into the through hole. Here, the fastening member (110) may be a bolt. That is, the first terminal fastening part (100) and the copper tube terminal (24) may be bolted together. Meanwhile, the first terminal connecting part (100) and the copper tube terminal (24) can be separated by separating the connecting member (110).

[0053] Referring to FIG. 3b and FIG. 4, in step S420, the cable connection part (32) of the low-voltage cable (30) and the second terminal connection part (100) among the plurality of terminal connection parts can be connected using the connection member (110).

[0054] For example, as illustrated in FIG. 3b, the cable terminal portion may have the same or similar shape as a plurality of terminal connecting portions (100). The second terminal connecting portion (100) may be placed overlappingly on the side of the cable connecting portion (32), and the through hole of the second terminal connecting portion (100) and the cable connecting portion (32) may be aligned. Subsequently, the second terminal connecting portion (100) may be connected to the cable connecting portion (32) by inserting a connecting member (110) into the through hole. Here, the connecting member (110) may be a bolt. That is, the second terminal connecting portion (100) and the cable connecting portion (32) may be connected by a bolt. Meanwhile, the second terminal connecting portion (100) and the cable connecting portion (32) may be separated by separating the connecting member (110).

[0055] Referring to FIGS. 3c to 3d and FIG. 4, in step S430, the connected second terminal connection part (100) and cable connection part (32) can be inserted into the interior of the insulating cover (300).

[0056] For example, as illustrated in FIGS. 3c to 3d, the insulating cover (300) may have an empty space inside and may be formed with both ends open. For example, the insulating cover (300) may have a cylindrical shape with an empty interior, but is not limited thereto.

[0057] At least one of a plurality of terminal fastening portions (100) may be inserted into the interior of the insulating cover (300). For example, a second terminal fastening portion (100) fastened by a fastening member may be inserted through an open end of the cable fastening portion insulating cover (300).

[0058] As described above, the method of connecting the terminal type fuse (10) according to the present invention can improve the convenience of installation for attaching and detaching the low-voltage cable and can reduce installation time and labor.

[0059] In addition, the method of connecting the terminal type fuse (10) can improve reliability by preventing cascading power outages caused by overload, short-circuit failure, etc. of the customer-side equipment.

[0060] In addition, the method of connecting the terminal type fuse (10) can protect the underground low-voltage service line (CV cable) by using a fuse on the service line in the same way as the overhead line.

[0061] Although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above. Various modifications are possible by those skilled in the art without departing from the essence of the invention as claimed in the patent claims, and such modifications should not be understood individually from the technical spirit or perspective of the present invention. Explanation of the symbols

[0063] 1: Ground transformer 10: Terminal type fuse 100 terminal connection part 110 Fastening member 200 fuses 300 insulation cover 22: Low-voltage terminal section 24: Copper tube terminal 30: Low-voltage cable 32: Cable connection part

Claims

Claim 1 A terminal-type fuse comprising: a fuse that cuts off an overcurrent occurring in a low-voltage cable connected to a ground transformer; a plurality of terminal connection parts connected to both ends of the fuse and respectively connected to the low-voltage cable and the low-voltage terminal part of the ground transformer; and an insulating cover that forms an empty space inside and into which at least one of the plurality of terminal connection parts is inserted, wherein among the plurality of terminal connection parts, a first terminal connection part is connected to a copper pipe terminal of the low-voltage terminal part, and among the plurality of terminal connection parts, a second terminal connection part is connected to a cable connection part of the low-voltage cable. Claim 2 In claim 1, the plurality of terminal connecting portions are terminal terminal type fuses having at least one through hole on a plate shape. Claim 3 In claim 2, the plurality of terminal connecting portions are terminal terminal type fuses that are connected to the copper tube terminal and the cable connecting portion, respectively, by inserting a connecting member into the through hole. Claim 4 In claim 3, the fastening member is a terminal-type fuse comprising a bolt. Claim 5 In claim 1, the plurality of terminal connecting portions are terminal terminal type fuses manufactured of copper material. Claim 6 In claim 3, the insulating cover is formed with both ends open, and the second terminal connecting part and the cable connecting part connected by the fastening member are inserted through the open end, forming a terminal terminal type fuse. Claim 7 A method for connecting a terminal-type fuse to a low-voltage terminal section of a ground transformer and a low-voltage cable, wherein the terminal-type fuse comprises a fuse, a plurality of terminal connecting sections, and an insulating cover; a step of connecting a copper pipe terminal of the low-voltage terminal section and a first terminal connecting section among the plurality of terminal connecting sections using a connecting member; a step of connecting a cable connecting section of the low-voltage cable and a second terminal connecting section among the plurality of terminal connecting sections using the connecting member; and a step of inserting the connected second terminal connecting section and the cable connecting section into the interior of the insulating cover. Claim 8 In claim 7, the fastening member comprises a bolt, a method for fastening a terminal-type fuse. Claim 9 In claim 7, the insulating cover is formed with both ends open, and the second terminal connecting part and the cable connecting part connected by the fastening member are inserted through the open end, in a method for connecting a terminal terminal type fuse.

Images