Power line communication cable

Abstract

A power line communication cable is provided, which includes a first wire pair provided to at least two first PLC electric wires twisted in a longitudinal direction to form a spiral structure, and a first outer jacket longitudinally wrapping around the first wire pair, the first outer jacket having a thickness greater than the thickness of the coating of each of the at least two first PLC electric wires, and power transmitted through each of the at least two first PLC electric wires having the same attributes.

Description

[Technical Field]

[0001] The present invention relates to a power line communication cable, and more particularly to a power line communication cable that can transmit power as well as communication signals at high speed over long distances. [Background technology]

[0002] Today's society requires more and more information, and we are entering an age of AI that searches for necessary information. As a result, the amount of information required is increasing. Here, such information is transmitted by wired or wireless communication.

[0003] Although wireless communication has the advantage of being very convenient because it transmits information wirelessly through the air, it has the problem that it is difficult to transmit information over long distances, and even if it does transmit information over long distances, the speed is low. Furthermore, with wireless communication, communication quality is not uniform depending on weather conditions, and communication may become impossible if there is an obstacle in the transmission path.

[0004] Although wired communication has the advantage of faster communication speeds than wireless communication, the many lines create a complex communication environment. To solve this problem, technologies that transfer communication and power over a single line have been commercialized.

[0005] Power line communication (PLC) is a typical technology that transfers both communication and power over a single line. Summary of the Invention [Problem to be solved by the invention]

[0006] Such power line communication has the advantage of being able to transmit a large amount of power, but is limited by its low communication speed.

[0007] Generally, power lines have thicker coatings than communication lines because a thicker coating is advantageous for electrical safety.

[0008] The communication line is also twisted. The more twisted the communication line, the more advantageous it is for high-speed communication and the longer the communication signal can be transmitted.

[0009] In contrast, power lines are not twisted, making high-speed communication impossible and shortening the transmission distance. This is because the power line's coating is thick. Thick coatings impose a limit on how much twisting can be done. Therefore, power lines with thick coatings are difficult to use for high-speed communication.

[0010] In response to this, there is a demand for a solution to power line communications that can transmit power as well as communication signals at high speed over long distances.

[0011] An object of the present invention is to provide a power line communication cable that can transmit power as well as communication signals at high speed over long distances.

[0012] Another object of the present invention is to provide an electrically safe power line communication cable.

[0013] However, the object of the present invention is not limited to the above. [Means for solving the problem]

[0014] To achieve the above object, the present invention provides a power line communication cable, which includes a first wire pair provided to at least two first PLC (Power Line Communication) wires twisted longitudinally to form a spiral structure, and a first outer jacket longitudinally wrapping around the first wire pair, wherein the first outer jacket has a thickness greater than the thickness of the coating of each of the at least two first PLC wires, and power transmitted via each of the at least two first PLC wires has the same attributes.

[0015] A plurality of the first electric wire pairs are provided, the first outer sheath wraps the plurality of first electric wire pairs together in the longitudinal direction, and the power transmitted through each of the plurality of first electric wire pairs has the same attributes.

[0016] The power supply further includes a second pair of wires, the second pair of wires being twisted longitudinally to form at least two second PLC wires in a spiral structure, and power transmitted through each of the at least two second PLC wires having the same attributes as each other; and the power supply further includes a second outer jacket, the second outer jacket longitudinally wrapping around the second pair of wires and having a thickness greater than the coating thickness of each of the at least two second PLC wires and the same thickness as the first outer jacket.

[0017] The second wire pairs are provided in plurality, the second outer casing wraps around the plurality of second wire pairs in a longitudinal direction, the power transmitted through each of the plurality of second wire pairs has the same attributes as each other and has opposite attributes to the power transmitted through each of the plurality of first wire pairs, and the power supply further includes a third outer casing, the third outer casing wraps around the first and second outer casings in a longitudinal direction.

[0018] When power and communication signals are transmitted from the transformer to the receiver via the power line communication cable, if only the power is received by the receiver and the communication signal is not received, the power received by the receiver is used to generate an alarm to warn an administrator of a possible internal short circuit. [Effects of the Invention]

[0019] According to the present invention, there is provided a power supply including a first wire pair provided to at least two first PLC electric wires twisted longitudinally to form a spiral structure, and a first outer sheath longitudinally wrapping around the first wire pair, wherein the first outer sheath has a thickness greater than the thickness of the coating of each of the at least two first PLC electric wires, and power transmitted through each of the at least two first PLC electric wires can have the same attributes as each other.

[0020] This makes it possible to provide a power line communication cable that can transmit power as well as communication signals at high speed over long distances.

[0021] Furthermore, according to the present invention, power transmitted through the PLC wires forming the same wire pair has the same attributes, so that even if a short circuit occurs, no fire will occur.

[0022] That is, according to the present invention, it is possible to provide an electrically safe cable for power line communication.

[0023] In addition, when power and communication signals are transferred via the power line communication cable according to the present invention, if the receiver receives only power and not the communication signal, the power transmitted via the power line communication cable according to the embodiment of the present invention can be used to generate an alarm to warn the administrator of the possibility of an internal short circuit.

[0024] That is, when the power line communication cable according to the embodiment of the present invention is used for power line communication, an abnormality detection alarm can be generated at any time even if the receiver does not have a battery. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a diagram showing a power line communication cable according to an embodiment of the present invention; [Figure 2] 1 is a cross-sectional view illustrating a power supply communication cable according to an embodiment of the present invention; [Figure 3]4 is a cross-sectional view illustrating a ground wire of a power communication cable according to an embodiment of the present invention. FIG. [Figure 4] 1 is a cross-sectional view illustrating a shield of a power supply communication cable according to an embodiment of the present invention. [Figure 5] 2A and 2B are diagrams illustrating a plurality of first wire pairs of a power and communication cable according to an embodiment of the present invention. [Figure 6] 2 is a cross-sectional view illustrating a plurality of first electric wire pairs of a power supply communication cable according to an embodiment of the present invention. FIG. [Figure 7] 2 is a diagram showing a first pair of electric wires and a second pair of electric wires of a power supply communication cable according to an embodiment of the present invention. FIG. [Figure 8] 1 is a cross-sectional view illustrating a first pair of electric wires and a second pair of electric wires of a power supply communication cable according to an embodiment of the present invention. [Figure 9] 10 is a schematic diagram illustrating an abnormality detection function of a power supply communication cable according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0026] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical concept of the present invention is not limited to the embodiments described herein and may be embodied in other forms. The embodiments described herein are provided so that the disclosure will be thorough and complete, and so that the concept of the present invention will be fully conveyed to those skilled in the art.

[0027] In this specification, when a component is described as being on another component, it means that it can be directly formed on the other component, or a third component can be sandwiched between them. Also, in the drawings, shapes and sizes are exaggerated for the purpose of effectively explaining the technical content.

[0028] Furthermore, in various embodiments of this specification, terms such as "first," "second," and "third" are used to describe various components, but these components should not be limited by such terms. These terms are used merely to distinguish one component from another. Thus, what is referred to as a "first" component in one embodiment may be referred to as a "second" component in another embodiment. Each embodiment described and exemplified herein also includes its complementary embodiment. Furthermore, in this specification, "and / or" is used to mean that at least one of the components listed before and after it is included.

[0029] In this specification, the singular expression includes the plural expression unless the context clearly dictates otherwise. Furthermore, the terms "comprise" or "have" are intended to specify the presence of a feature, number, step, component, or combination thereof described in the specification, and should not be understood to exclude the presence or possibility of addition of one or more other features, numbers, steps, components, or combinations thereof. Furthermore, in this specification, the term "coupled" is used to mean both indirectly and directly coupling multiple components.

[0030] Furthermore, when describing the present invention, if a detailed description of related publicly known functions or configurations is deemed to unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

[0031] FIG. 1 is a diagram showing a power line communication cable according to one embodiment of the present invention, FIG. 2 is a cross-sectional schematic diagram for explaining a power communication cable according to one embodiment of the present invention, FIG. 3 is a cross-sectional schematic diagram for explaining an earth wire of a power communication cable according to one embodiment of the present invention, FIG. 4 is a cross-sectional schematic diagram for explaining a shield of a power communication cable according to one embodiment of the present invention, FIG. 5 is a diagram showing multiple first electric wire pairs of a power communication cable according to one embodiment of the present invention, FIG. 6 is a cross-sectional schematic diagram for explaining multiple first electric wire pairs of a power communication cable according to one embodiment of the present invention, FIG. 7 is a diagram showing a first electric wire pair and a second electric wire pair of a power communication cable according to one embodiment of the present invention, FIG. 8 is a cross-sectional schematic diagram for explaining a first electric wire pair and a second electric wire pair of a power communication cable according to one embodiment of the present invention, and FIG. 9 is a schematic diagram for explaining an abnormality detection function of a power communication cable according to one embodiment of the present invention.

[0032] As shown in FIGS. 1 and 2, a power line communication cable 100 according to one embodiment of the present invention is connected between a transformer (Tx in FIG. 9) and a receiver (Rx in FIG. 9).

[0033] As a result, during power line communication (PLC), power and communication signals are transmitted from the transformer (Tx in FIG. 9) to the receiver (Rx in FIG. 9) via the power line communication cable 100.

[0034] Thus, a power line communication cable 100 according to one embodiment of the present invention, which is used for power line communication (PLC) between a transformer (Tx in FIG. 9) and a receiver (Rx in FIG. 9), is formed to include a first wire pair 110 and a first outer sheath 120.

[0035] The first wire pair 110 is provided with at least two first PLC wires, where the at least two first PLC wires are longitudinally twisted to form a helical structure.

[0036] In this way, when at least two first PLC wires provided in the first wire pair 110 are twisted longitudinally to form a spiral structure, high-speed communication is possible, leakage of communication signals is prevented during the transmission of communication signals, and communication signals can be transmitted over long distances.

[0037] Here, the communication speed and communication distance are proportional to the number of times that the at least two first PLC electric wires are twisted in the longitudinal direction.

[0038] That is, the more the at least two first PLC wires are twisted in the longitudinal direction, the greater the communication speed and communication distance.

[0039] According to one embodiment of the present invention, the first PLC wire comprises a 1-1 PLC wire 111a and a 1-2 PLC wire 111b.

[0040] Thus, according to one embodiment of the present invention, the first wire pair 110 is provided as a 1-1 PLC wire 111a and a 1-2 PLC wire 111b that are twisted in the longitudinal direction to form a spiral structure.

[0041] Here, each of the 1-1 PLC electric wire 111a and the 1-2 PLC electric wire 111b extends in one direction and includes a core (C) made of a conductor, and a covering layer (S) made of an insulator that wraps around the core (C) in the longitudinal direction.

[0042] According to one embodiment of the present invention, the covering layer (S) may have a thickness smaller than that of a covering of a normal power line.

[0043] The covering layer (S) may have a thickness similar to that of a covering of a normal communication line, for example.

[0044] According to one embodiment of the present invention, since the coating layer (S) of each of the 1-1 PLC wire 111a and the 1-2 PLC wire 111b has a thin thickness, the 1-1 PLC wire 111a and the 1-2 PLC wire 111b are twisted more in the longitudinal direction, thereby increasing the communication speed and communication distance.

[0045] That is, according to an embodiment of the present invention, the covering layer (S) of each of the PLC wire 1-1 111a and the PLC wire 1-2 111b may have a thickness similar to that of a covering of a general communication wire.

[0046] As a result, the power line communication cable 100 according to one embodiment of the present invention is capable of high speed communication similar to that of a normal communication line, and is also capable of long distance transmission of communication signals.

[0047] Here, the 1-1 PLC wire 111a and the 1-2 PLC wire 111b can transfer power together with a communication signal for power line communication (PLC).

[0048] Therefore, if the thickness of the covering layer (S) of each of the 1-1 PLC electric wire 111a and the 1-2 PLC electric wire 111b is thinner than the covering thickness of a normal power line, it is difficult to ensure electrical safety.

[0049] In other words, if the thickness of the coating layer (S) of each of the 1-1 PLC wire 111a and the 1-2 PLC wire 111b used for power line communication (PLC) is thinner than the coating thickness of a normal power line, the possibility of a short circuit occurring increases, which in turn increases the risk of a fire caused by a short circuit.

[0050] According to an embodiment of the present invention, the power transmitted through the PLC wire 1-1 and the PLC wire 111b may have the same attributes.

[0051] For example, the power source transmitted through the 1-1 PLC power line 111a is an AC+ power source, and the power source transmitted through the 1-2 PLC power line 111b is the same AC+ power source as the AC+ power source transmitted through the 1-1 PLC power line 111a.

[0052] Furthermore, the power source transmitted via the 1-1 PLC power cable 111a is an AC power source, and the power source transmitted via the 1-2 PLC power cable 111b is the same AC power source as the AC power source transmitted via the 1-1 PLC power cable 111a.

[0053] In addition, when the power source transmitted through the 1-1 PLC wire 111a is a DC+ power source, the power source transmitted through the 1-2 PLC wire 111b is a DC+ power source with the same attributes as the power source transmitted through the 1-1 PLC wire 111a, and when the power source transmitted through the 1-1 PLC wire 111a is a DC- power source, the power source transmitted through the 1-2 PLC wire 111b is a DC- power source with the same attributes as the power source transmitted through the 1-1 PLC wire 111a.

[0054] Thus, the power line communication cable 100 according to one embodiment of the present invention includes a first wire pair 110 in which the transmitted power is provided to the 1-1 PLC wire 111a and the 1-2 PLC wire 111b, which have the same attributes.

[0055] Therefore, according to one embodiment of the present invention, even if the thickness of the coating layer (S) of each of the 1-1 PLC wire 111a and the 1-2 PLC wire 111b is formed thinner than the coating thickness of a normal power line, the electrical safety problem caused thereby can be solved.

[0056] That is, according to one embodiment of the present invention, since the power transmitted through the 1-1 PLC wire 111a and the 1-2 PLC wire 111b has the same attributes, the thickness of the coating layer (S) of each of the 1-1 PLC wire 111a and the 1-2 PLC wire 111b is formed thinner than the coating thickness of a normal power wire, so that even if a short circuit occurs, it will not lead to a fire.

[0057] As described above, according to one embodiment of the present invention, it is possible to provide a power line communication cable 100 that is electrically safe and capable of transmitting power as well as communication signals at high speed over long distances.

[0058] Meanwhile, since electrical safety is ensured, the coating layer (S) of each of the 1-1 PLC electric wire 111a and the 1-2 PLC electric wire 111b can be formed with a thinner thickness, and therefore, the 1-1 PLC electric wire 111a and the 1-2 PLC electric wire 111b can be twisted further in the longitudinal direction to form more strands.

[0059] This allows the communication speed and communication distance of the power line communication cable 100 according to one embodiment of the present invention to be further increased.

[0060] Then, as shown in Figures 1 and 2, the first outer jacket 120 can be wrapped longitudinally around the first wire pair 110 provided in the 1-1 PLC wire 111a and the 1-2 PLC wire 111b, which are twisted longitudinally to form a helical structure.

[0061] Here, according to one embodiment of the present invention, the first outer cover 120 may have a thickness greater than the thickness of each coating layer (S) of the 1-1 PLC electric wire 111a and the 1-2 PLC electric wire 111b in order to electrically and safely protect the 1-1 PLC electric wire 111a and the 1-2 PLC electric wire 111b.

[0062] For example, the first outer cover 120 is provided with a thickness equivalent to that of a normal power line for electrical safety.

[0063] Meanwhile, as shown in FIG. 3, the power line communication cable 100 according to an embodiment of the present invention further includes a ground wire 130.

[0064] According to an embodiment of the present invention, the ground wire 130 is provided in parallel with the first PLC electric wire 111a and the second PLC electric wire 111b in the longitudinal direction thereof.

[0065] Here, the earth wire 130 is wrapped in the longitudinal direction by the first outer cover 120 together with the 1-1 PLC electric wire 111a and the 1-2 PLC electric wire 111b.

[0066] However, this is just one example, and the present invention is not limited to the earth wire 130 being arranged longitudinally alongside the 1-1 PLC electric wire 111a and the 1-2 PLC electric wire 111b within the first outer cover 120.

[0067] As another example, the earth wire 130 may be arranged in a form that wraps around the 1-1 PLC electric wire 111a and the 1-2 PLC electric wire 111b in the longitudinal direction, or may be arranged outside the first outer sheath 120 in the longitudinal direction of the first outer sheath 120, or may be arranged in a form that wraps around the first outer sheath 120.

[0068] Furthermore, as another example, the earth wire 130 may be arranged inside the first outer sheath 120 in a form that wraps around the 1-1 PLC electric wire 111a and the 1-2 PLC electric wire 111b in the longitudinal direction, and may also be arranged outside the first outer sheath 120 in a form that wraps around the first outer sheath 120.

[0069] In this manner, the ground wire 130 is provided on at least one of the inside and outside of the first outer cover 120 .

[0070] On the other hand, as shown in FIG. 4, the power line communication cable 100 according to the embodiment of the present invention further includes a shield 140.

[0071] According to an embodiment of the present invention, the shield 140 prevents the PLC wires 1-1 and 1-2 from being affected by external signals or noise.

[0072] In addition, the shield 140 prevents signals and magnetic fields from leaking out from the 1-1 PLC wire 111a and the 1-2 PLC wire 111b.

[0073] For this purpose, the shield 140 is provided in a form that wraps around the first outer skin 120 in the longitudinal direction.

[0074] However, this is just an example, and the shield 140 may be provided in a form that wraps around each of the 1-1 PLC electric wire 111a and the 1-2 PLC electric wire 111b in the longitudinal direction.

[0075] As another example, the shield 140 may be provided in a form that simultaneously encloses the first PLC electric wire 111a and the first PLC electric wire 111b in the longitudinal direction.

[0076] In another example, the shield 140 may be provided on both the inside and outside of the first outer skin 120 .

[0077] In this manner, the shield 140 is provided on at least one of the inside and outside of the first outer skin 120 .

[0078] Here, it goes without saying that the shield 140 may also be configured to enclose the earth wire 130 in the longitudinal direction.

[0079] On the other hand, as shown in FIGS. 5 and 6, a plurality of first wire pairs 110 are provided.

[0080] According to one embodiment of the present invention, the first wire pair 110 includes a 1-1 wire pair 110a and a 1-2 wire pair 110b.

[0081] The first electric wire pair 110a is provided as a first PLC electric wire 111a and a second PLC electric wire 111b which are twisted in the longitudinal direction to form a helical structure.

[0082] The first-second pair of electric wires 110b is provided to a first-third PLC electric wire 111c and a first-fourth PLC electric wire 111d which are twisted in the longitudinal direction to form a spiral structure.

[0083] According to an embodiment of the present invention, the power transmitted through the PLC wire 1-1 and the PLC wire 111b has the same attribute.

[0084] Furthermore, according to an embodiment of the present invention, the power transmitted through the 1-3 PLC wire 111c and the 1-4 PLC wire 111d has the same attribute.

[0085] Here, according to one embodiment of the present invention, the power transmitted via the 1-1 PLC power line 111a and the 1-2 PLC power line 111b and the power transmitted via the 1-3 PLC power line 111c and the 1-4 PLC power line 111d may have the same attributes.

[0086] For example, if the power transmitted through the 1-1 PLC power line 111a and the 1-2 PLC power line 111b is AC+ power, the power transmitted through the 1-3 PLC power line 111c and the 1-4 PLC power line 111d is also AC+ power.

[0087] Furthermore, if the power transmitted via the 1-1 PLC power cable 111a and the 1-2 PLC power cable 111b is AC power, the power transmitted via the 1-3 PLC power cable 111c and the 1-4 PLC power cable 111d is also AC power.

[0088] Furthermore, when the power source transmitted via the 1-1 PLC wire 111a and the 1-2 PLC wire 111b is a DC+ power source, the power source transmitted via the 1-3 PLC wire 111c and the 1-4 PLC wire 111d is also a DC+ power source, and when the power source transmitted via the 1-1 PLC wire 111a and the 1-2 PLC wire 111b is a DC- power source, the power source transmitted via the 1-3 PLC wire 111c and the 1-4 PLC wire 111d is also a DC- power source.

[0089] This prevents a fire from occurring even if a short circuit occurs, ensuring electrical safety.

[0090] Here, the first outer cover 120 can wrap around the plurality of first wire pairs 110 integrally in the longitudinal direction.

[0091] That is, the first outer cover 120 can wrap around the 1-1 electric wire pair 110a and the 1-2 electric wire pair 110b, which have the same attributes, in a longitudinal direction.

[0092] As shown in FIGS. 7 and 8, the power line communication cable 100 according to one embodiment of the present invention further includes a second wire pair 150.

[0093] There are provided a plurality of second electric wire pairs 150. According to one embodiment of the present invention, the second electric wire pairs 150 include a 2-1 electric wire pair 150a and a 2-2 electric wire pair 150b.

[0094] The 2-1 wire pair 150a is provided as at least two second PLC wires that are twisted longitudinally to form a helix.

[0095] According to one embodiment of the present invention, the second PLC wires constituting the 2-1 wire pair 150a are provided as a 2-1 PLC wire 151a and a 2-2 PLC wire 151b that are twisted in the longitudinal direction to form a spiral structure.

[0096] The second-second pair of electric wires 150b is provided as at least two second PLC electric wires that are twisted in the longitudinal direction to form a helical structure.

[0097] According to one embodiment of the present invention, the second PLC wires constituting the 2-2 wire pair 150b are provided as a 2-3 PLC wire 151c and a 2-4 PLC wire 151d that are twisted longitudinally to form a helical structure.

[0098] According to an embodiment of the present invention, the power transmitted through the 2-1 PLC wire 151a and the 2-2 PLC wire 151b has the same attribute.

[0099] Furthermore, according to an embodiment of the present invention, the power transmitted through the second-third PLC wire 151c and the second-fourth PLC wire 151d has the same attribute.

[0100] Here, according to one embodiment of the present invention, the power transmitted via the 2-1 PLC wire 151a and the 2-2 PLC wire 151b and the power transmitted via the 2-3 PLC wire 151c and the 2-4 PLC wire 151d may have the same attributes.

[0101] For example, if the power source transmitted via the 2-1 PLC wire 151a and the 2-2 PLC wire 151b is AC+ power source, the power source transmitted via the 2-3 PLC wire 151c and the 2-4 PLC wire 151d is also AC+ power source, and if the power source transmitted via the 2-1 PLC wire 151a and the 2-2 PLC wire 151b is AC- power source, the power source transmitted via the 2-3 PLC wire 151c and the 2-4 PLC wire 151d is also AC- power source.

[0102] Furthermore, when the power source transmitted via the 2-1 PLC wire 151a and the 2-2 PLC wire 151b is a DC+ power source, the power source transmitted via the 2-3 PLC wire 151c and the 2-4 PLC wire 151d is also a DC+ power source, and when the power source transmitted via the 2-1 PLC wire 151a and the 2-2 PLC wire 151b is a DC- power source, the power source transmitted via the 2-3 PLC wire 151c and the 2-4 PLC wire 151d is also a DC- power source.

[0103] This prevents a fire from occurring even if a short circuit occurs, ensuring electrical safety.

[0104] Here, according to one embodiment of the present invention, the power transmitted through each of the 2-1 wire pair 150a and the 2-2 wire pair 150b may have opposite attributes to the power transmitted through each of the 1-1 wire pair 110a and the 1-2 wire pair 110b.

[0105] That is, the power transmitted via the 2-1 PLC wire 151a, the 2-2 PLC wire 151b, the 2-3 PLC wire 151c, and the 2-4 PLC wire 151d and the power transmitted via the 1-1 PLC wire 111a, the 1-2 PLC wire 111b, the 1-3 PLC wire 111c, and the 1-4 PLC wire 111d may have opposite attributes.

[0106] For example, when the power transmitted through the 1-1 PLC electric wire 111a, the 1-2 PLC electric wire 111b, the 1-3 PLC electric wire 111c, and the 1-4 PLC electric wire 111d is AC+ power, the power transmitted through the 2-1 PLC electric wire 151a, the 2-2 PLC electric wire 151b, the 2-3 PLC electric wire 151c, and the 2-4 PLC electric wire 151d is AC- power. Therefore, when the power source transmitted via the 1-1 PLC electric wire 111a, the 1-2 PLC electric wire 111b, the 1-3 PLC electric wire 111c, and the 1-4 PLC electric wire 111d is AC- power, the power source transmitted via the 2-1 PLC electric wire 151a, the 2-2 PLC electric wire 151b, the 2-3 PLC electric wire 151c, and the 2-4 PLC electric wire 151d is AC+ power.

[0107] Even when DC power is transmitted through the power line communication cable 100 according to one embodiment of the present invention, the polarity of the power transmitted through the 1-1 PLC wire 111a, the 1-2 PLC wire 111b, the 1-3 PLC wire 111c, and the 1-4 PLC wire 111d may be opposite to the polarity of the power transmitted through the 2-1 PLC wire 151a, the 2-2 PLC wire 151b, the 2-3 PLC wire 151c, and the 2-4 PLC wire 151d.

[0108] Meanwhile, the power line communication cable 100 according to the embodiment of the present invention further includes a second outer sheath 160 .

[0109] The second outer jacket 160 may be wrapped longitudinally around and integral with the plurality of second wire pairs 150 .

[0110] That is, the second outer cover 160 can wrap around the 2-1 electric wire pair 150a and the 2-2 electric wire pair 150b having the same attribute in a longitudinal direction. More specifically, the second outer cover 160 wraps around the 2-1 PLC electric wire 151a, the 2-2 PLC electric wire 151b, the 2-3 PLC electric wire 151c, and the 2-4 PLC electric wire 151d in a longitudinal direction.

[0111] According to one embodiment of the present invention, such second skin 160 has the same thickness as the first skin 120 .

[0112] This allows the second outer cover 160 to have a thickness greater than the thickness of the coating layer (S) of each of the 2-1 PLC electric wire 151a, the 2-2 PLC electric wire 151b, the 2-3 PLC electric wire 151c, and the 2-4 PLC electric wire 151d.

[0113] Meanwhile, according to one embodiment of the present invention, the ground wire 130 is provided on at least one of the inside and outside of the second outer cover 160, and the shield 140 is also provided on at least one of the inside and outside of the second outer cover 160.

[0114] Meanwhile, the power line communication cable 100 according to the embodiment of the present invention further includes a third outer sheath 170 .

[0115] The third outer cover 170 is provided in a form in which it wraps, for example, around the first outer cover 120 that wraps, integrally in the longitudinal direction, around the 1-1 electric wire pair 110a and the 1-2 electric wire pair 110b, and the second outer cover 160 that wraps, integrally in the longitudinal direction, around the 2-1 electric wire pair 150a and the 2-2 electric wire pair 150b.

[0116] Here, according to one embodiment of the present invention, the third outer cover 170 is provided with a thickness equivalent to that of a normal power cable to electrically and safely protect the first PLC wires comprising the 1-1 wire pair 110a and the 1-2 wire pair 110b, and the second PLC wires comprising the 2-1 wire pair 150a and the 2-2 wire pair 150b.

[0117] For example, the third outer layer 170 may have the same thickness as the first outer layer 120 and the second outer layer 160. In addition, since the third outer layer 170 is exposed to the outside, it may have a thickness relatively greater than the first outer layer 120 and the second outer layer 160.

[0118] As described above, the power line communication cable 100 according to one embodiment of the present invention comprises a first wire pair 110 in which at least two first PLC wires having the same attributes of the power to be transmitted are twisted longitudinally to form a spiral structure.

[0119] In addition, the power line communication cable 100 according to one embodiment of the present invention includes a second wire pair 150 in which at least two second PLC wires having the same attributes of the power to be transmitted are twisted longitudinally to form a spiral structure.

[0120] This makes it possible to provide a power line communication cable 100 that can transmit power as well as communication signals at high speed over long distances.

[0121] Here, since the power transmitted through the PLC wires forming the same wire pair has the same attributes, even if a short circuit occurs, it will not lead to a fire.

[0122] This makes it possible to provide an electrically safe power line communication cable 100.

[0123] As shown in FIG. 9, such a power line communication cable 100 is connected between a transformer (Tx) and a receiver (Rx).

[0124] As a result, during power line communication, power and communication signals are transmitted from the transformer (Tx) to the receiver (Rx) via the power line communication cable 100.

[0125] Here, when the power supply and the communication signal are transmitted from the transformer (Tx) to the receiver (Rx) through the power supply line communication cable 100, the receiver (Rx) may receive only the power supply and not the communication signal, which means that there is no electrical abnormality.

[0126] In this case, the power received by the receiver (Rx) via the power line communication cable 100 can be used to generate an alarm to warn an administrator of the possibility of an internal short circuit.

[0127] As a result, the generated alarm is output on the screen (10) of the administrator terminal (P) in the form of a warning sound and a warning message using the power received by the receiver (Rx) via the power line communication cable 100.

[0128] In this way, when the power line communication cable 100 according to one embodiment of the present invention is used for power line communication (PLC) between a transformer (Tx) and a receiver (Rx), an abnormality detection alarm for the communication signal can be generated at any time in the receiver (Rx) even without a battery.

[0129] Although the present invention has been described in detail using preferred embodiments, the scope of the present invention should not be limited to the specific embodiments, but should be analyzed by the appended claims. Furthermore, those skilled in the art will understand that many modifications and variations are possible within the scope of the present invention.

Claims

1. a first wire pair provided to at least two first PLC wires that are longitudinally twisted to form a helical structure; a first outer cover longitudinally wrapped around the first pair of wires; the first outer jacket has a thickness greater than the coating thickness of each of the at least two first PLC electric wires; A power line communication cable, wherein the power transmitted through each of the at least two first PLC wires has the same attributes as each other.

2. a plurality of first wire pairs are provided, the first outer jacket integrally wraps around the plurality of first electric wire pairs in a longitudinal direction; The power line communication cable according to claim 1 , wherein the power transmitted through each of the plurality of first electric wire pairs has the same attributes.

3. further comprising a second pair of wires; The second wire pair is provided as at least two second PLC wires that are longitudinally twisted to form a helical structure; the power sources transmitted through the at least two second PLC wires have the same attributes as each other; further comprising a second outer skin; 3. The power line communication cable according to claim 2, wherein the second outer sheath longitudinally wraps around the second pair of electric wires and has a thickness greater than the thickness of the coating of each of the at least two second PLC electric wires and the same thickness as the first outer sheath.

4. The second wire pair is provided in plurality, the second outer jacket integrally wraps around the plurality of second electric wire pairs in a longitudinal direction; the power sources transmitted through the plurality of second wire pairs each have the same attribute and have opposite attributes to the power sources transmitted through the plurality of first wire pairs each; further comprising a third outer shell; 4. The power line communication cable according to claim 3, wherein the third outer sheath wraps around the first outer sheath and the second outer sheath integrally in the longitudinal direction.

5. When power and communication signals are transmitted from the transformer to the receiver through the power line communication cable, only the power is received by the receiver; 2. The power line communication cable of claim 1, wherein if the communication signal is not received, the power received by the receiver is used to generate an alarm to warn an administrator of a possible internal short circuit.

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