KR20150101221A - Optical power signal cable - Google Patents

Abstract

The present invention provides an optical power signal cable for moving. The optical power signal cable includes: power line units which are formed of a conductor and an insulating layer which covers the conductor; ground line units which are arranged between adjacent power line units; an optical fiber unit which has at least one optical fiber core and a tube for mounting the optical fiber core; a signal line unit which is formed of signal lines; and a sheath layer which surrounds the power line units, the ground line units, the optical fiber unit, and the signal line unit. The optical fiber unit and the ground line units are dispersed between the adjacent power line units. The signal unit is dispersed between the adjacent power line units and the ground line units, and the adjacent power line unit and the optical fiber unit.

Description

[0001] Optical power signal cable [0001]

One embodiment of the present invention relates to a moving optical power signal cable.

Stackers used in coal-fired power stations, steel mills, crane for moving crane such as reclaimer, and harbors, etc., which supply power to vessels in the harbor. Large-scale heavy equipment such as RTGC (Crane Loaded Gantry Crane), RMGC (Rail Mounted Gantry Crane), STS (Ship to Shore), and Mobile Crane such as Continuous Ship Unloaded (CSU) Optical power signal cable that combines an optical cable and a power cable is used for monitoring the crane at the same time as power is applied.

The optical power signal cable used for the above-mentioned terrestrial power supply apparatus and portable heavy equipment is generally called a reel cable. Since such reel cable must move along with large heavy equipment movement such as a ship or a crane, There is a problem in that the lifetime of the reel attached to the optical power signal cable is shortened due to repeated fatigue and stress caused by frequent disconnection of the optical cable.

In addition, the reel cable is specifically defined by the formula "number of laminated cables x cable weight / m < RTI ID = 0.0 > × 9.8N × (2 × cable weight / m) ". Further, as time elapses, pressure is transmitted to the sheath of the rubber material of the optical cable and the insulating layer, so that the optical cable is distorted in a certain direction, There is a short life span.

Therefore, in case of being used for optical power signal cable for reel of large heavy equipment for moving, that is, when it is subjected to excessive fatigue and stress due to repetition of winding and winding on the reel, Optical cable having a relatively long life and an optical power signal cable including the optical cable is required even when the optical cable is used under severe conditions in which the load transferred to the lower layer cable is increased.

The main object of the present invention is to provide a photoelectric composite cable for a reel for power supply and monitoring of a large heavy equipment for mobile, which is excellent in mechanical properties such as impact resistance, so that the reel is repeatedly unwound and wound to receive excessive fatigue and stress And more particularly to provide a movable optical power signal cable having a relatively long lifetime by avoiding disconnection even when used under harsh conditions in which a load transferred to a lower layer cable is increased by being wound on the reel in a laminated manner.

A moving optical power signal cable according to an embodiment of the present invention includes three power line units for supplying three-phase power; Two ground wire units composed of a conductor and an insulating layer covering the conductor; An optical fiber unit having at least one optical fiber core wire and a tube for mounting the optical fiber core wire; And a plurality of signal line units each comprising a plurality of signal lines; Wherein the optical fiber unit and the grounding line units are dispersedly disposed between adjacent power line units, and each of the signal line units is disposed between the adjacent power line unit and the ground line unit, and between adjacent power line units And can be dispersedly disposed between the optical fiber units.

In the present invention, the power line unit may comprise a conductor and an insulating layer covering the conductor.

In the present invention, the power line units can be circumscribed with each other.

In the present invention, the cross-sectional area of each of the power line units may be substantially the same.

In the present invention, the three power line units may be disposed at intervals of 120 degrees around the center axis of the moving optical power signal cable.

In the present invention, the ground wire unit may be circumscribed to at least one of the power line units of two adjacent power line units.

In the present invention, the sum of the cross-sectional areas of the conductors of the two ground wire units may be 50% or more of the cross-sectional area of one conductor of the power line unit.

In the present invention, the diameter of the optical fiber unit may be 90% to 110% of the diameter of the ground wire unit.

In the present invention, the signal line unit is disposed in a space defined by an outer surface of the power line unit adjacent to the power line unit and an outer surface of the ground line unit, and the space between the outer surface of the adjacent power line unit and the outer surface of the optical fiber unit So that they can be dispersedly disposed within the moving optical power signal cable.

In the present invention, the signal line unit may be disposed in a common outer line of the power line unit and the ground line unit.

In the present invention, the signal line unit may be disposed in a common outer line of the power line unit and the optical fiber unit.

In the present invention, the total cross-sectional area of the conductors of the plurality of signal line units may be less than or equal to 50% of the cross-sectional area of the conductors of one ground line unit.

In the present invention, it is possible to further include a sheath layer surrounding the power line unit, the ground line unit, the optical fiber unit, and the outer circumference of the signal line unit.

In the present invention, the signal line unit may be disposed apart from the inner surface of the sheath layer.

In the present invention, the filler may be filled in the sheath layer.

In the present invention, it is possible to further include a fiber braided layer disposed between the sheath layer and the filler.

In the present invention, the sheath layer and the filler may be made of the same material.

In the present invention, the filler may be composed of rubber or polyurethane.

The present invention may further include a plug connected to the end of the moving optical power signal cable and capable of engaging with a socket box of the power supply unit.

In the present invention, signal line units that are not used for signal transmission among the signal line units may be disposed in the plug.

A moving optical power signal cable according to another embodiment of the present invention includes a plurality of power line units each comprising a conductor and an insulating layer covering the conductor; A plurality of ground line units disposed between adjacent power line units; An optical fiber unit having at least one optical fiber core wire and a tube for mounting the optical fiber core wire; A signal line unit comprising a plurality of signal lines; Wherein the optical fiber unit and the grounding line units are dispersedly disposed between the power line units adjacent to each other, and each of the signal line units is disposed between the adjacent power line unit and the ground line unit, And can be dispersedly disposed between the optical fiber units.

In the present invention, the power line unit may comprise a first power line unit, a second power line unit and a third power line unit for supplying three-phase power.

In the present invention, it is preferable that the ground wire unit comprises a first ground wire unit and a second ground wire unit, the first ground wire unit is disposed between the first power wire unit and the second power wire unit, And may be disposed between the first power line unit and the third power line unit.

In the present invention, the optical fiber unit may be disposed between the second power line unit and the third power line unit.

In the present invention, each of the signal line units may be disposed between the first power line unit and the first ground line unit, between the second power line unit and the first ground line unit, between the second power line unit and the optical fiber unit, 3 power line unit and the optical fiber unit, between the third power line unit and the second ground line unit, and between the first power line unit and the second ground line unit.

In the present invention, the first ground wire unit may be circumscribed with the first power line unit or the second power line unit.

In the present invention, the second ground line unit may be circumscribed with the first power line unit or the third power line unit.

In the present invention, the optical fiber unit may be circumscribed with the second power line unit or the third power line unit.

In the present invention, each of the signal line units may be disposed within a common external line of the first power line unit and the first ground line unit, in a common external line of the second power line unit and the first ground line unit, Within the common circumscribed line of the optical fiber unit, within the common circumscribed line of the third power line unit and the optical fiber unit, in the common circumscribed line of the third power line unit and the second ground line unit, or within the common line of the first power line unit and the second ground line unit And can be disposed in the common external line.

In the present invention, the power line unit may comprise a conductor and an insulating layer covering the conductor.

In the present invention, the power line units can be circumscribed with each other.

In the present invention, the cross-sectional area of each of the power line units may be substantially the same.

In the present invention, the three power line units may be disposed at intervals of 120 degrees around the central axis of the moving optical power signal cable.

In the present invention, the sum of the cross-sectional areas of the conductors of the ground wire unit may be 50% or more of the cross-sectional area of one conductor of the power line unit.

In the present invention, the diameter of the optical fiber unit may be 90% to 110% of the diameter of the ground wire unit.

In the present invention, the total cross-sectional area of the conductors of the plurality of signal line units may be less than or equal to 50% of the cross-sectional area of the conductors of one ground line unit.

In the present invention, it is possible to further include a sheath layer surrounding the power line unit, the ground line unit, the optical fiber unit, and the outer circumference of the signal line unit.

In the present invention, the signal line unit may be disposed apart from the inner surface of the sheath layer.

In the present invention, the filler may be filled in the sheath layer.

In the present invention, it is possible to further include a fiber braided layer disposed between the sheath layer and the filler.

In the present invention, the sheath layer and the filler may be made of the same material.

In the present invention, the filler may be composed of a rubber-based material or polyurethane.

The present invention may further include a plug connected to the end of the moving optical power signal cable and capable of engaging with a socket box of the power supply unit.

In the present invention, signal line units that are not used for signal transmission among the signal line units may be disposed in the plug.

In the present invention, the moving optical power signal cable may transmit electric power from the terrestrial power supply apparatus to the ship by connecting the ship with an alternative power source (Alternative Maritime Power; AMP).

According to an embodiment of the present invention, it is possible to minimize the signal transmission interruption due to disconnection of the movable optical power signal cable due to the bending stress in the movable optical power signal cable, to secure the structural stability of the movable optical power signal cable, The life of the power signal cable can be improved.

FIG. 1 is a cross-sectional view schematically showing a moving optical power signal cable according to an embodiment of the present invention.
2 is a perspective view schematically showing a moving optical power signal cable according to an embodiment of the present invention.
FIGS. 3 and 4 are cross-sectional views schematically showing a moving optical power signal cable shown in FIG. 1. FIG.
5 is a conceptual diagram showing a moving optical power signal cable used for ship power supply between a ship and a port.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like reference numerals designate like elements throughout the specification.

FIG. 1 is a cross-sectional view schematically showing a moving optical power signal cable according to an embodiment of the present invention, and FIG. 2 is a perspective view schematically showing a moving optical power signal cable according to an embodiment of the present invention.

1 and 2, a moving optical power signal cable 100 according to an embodiment of the present invention includes power line units 110a, 110b and 110c, ground line units 120a and 120b, an optical fiber unit 140, A unit 130, a sheath layer 151, a filler 152, and a braided layer 153. [

The power line units 110a, 110b, and 110c function to transmit power. The power line units 110a, 110b and 110c may include a conductor 111 and an insulation layer 112 surrounding the outer surface of the conductor 111, respectively. The conductor 111 may be made of a conductive material such as copper or aluminum.

A plurality of power line units may be provided within the portable optical power signal cable 100. In one example, when the movable optical power signal cable 100 transmits three-phase power, the power line units 110a, 110b and 110c are connected to the first power line unit 110a, the second power line unit 110b, And a power line unit 110c. The first power line unit 110a, the second power line unit 110b, and the third power line unit 110c can supply 6.6kV power having a phase difference of 120 degrees.

The first power line unit 110a, the second power line unit 110b, and the third power line unit 110c may be arranged to circumscribe each other. That is, the first power line unit 110a and the second power line unit 110b may be externally connected to each other, or the second power line unit 110b and the third power line 110c may be externally connected to each other, The first power line units 110a can be circumscribed each other.

Each of the first power line unit 110a, the second power line unit 110b, and the third power line unit 110c may have the same cross sectional area. 3, the diameter d1 of the first power line unit 110a, the diameter d2 of the second power line unit 110b, and the diameter d3 of the third power line unit 110c are the same, 1 power line unit 110a, the second power line unit 110b, and the third power line unit 110c may have the same cross sectional area.

Each of the first power line unit 110a, the second power line unit 110b and the third power line unit 110c may be disposed at an interval of 120 ° around the center axis of the moving optical power signal cable 100. The first power line unit 110a, the second power line unit 110b, and the third power line unit 110c are arranged at equal intervals of 120 °, thereby contributing to the circular holding of the moving optical power signal cable 100.

A string 160 may be disposed at the center of the moving optical power signal cable 100. The sting 160 may be made of a rubber-based material or a semi-conductive rubber-based material, and is disposed at the center of the moving optical power signal cable 100 to maintain the arrangement of the power line units 110a, 110b, and 110c And the like.

The ground wire units 120a and 120b may include a conductive wire 121 made of a conductive material such as copper or aluminum and an insulating layer 122 surrounding the conductive wire 121. [ The ground wire units 120a and 120b are grounded at one or both ends to perform a function of flowing a current to a ground or shielding noise when a lightning stroke occurs or a short circuit occurs.

A plurality of ground wire units may be disposed within the moving optical power signal cable 100, but as one example, the ground wire unit may comprise a first ground wire unit 120a and a second ground wire unit 120b as shown in FIG. have.

Referring to FIG. 1, each of the first ground line unit 120a, the second ground line unit 120b, and the optical fiber unit 140 may be disposed between adjacent power line units 110a, 110b, and 110c. More specifically, the first ground wire unit 120a is disposed between the first power line unit and the second power line unit, and the second ground line unit can be disposed between the first power line unit and the third power line unit have. Further, the optical fiber unit may be disposed between the second power line unit and the third power line unit.

The diameter of the optical fiber unit 140 may be between 90% and 110% of the diameter of the ground wire unit, and the ground wire unit 120a, have.

Thus, the first ground wire unit 120a, the second ground wire unit 120b, and the optical fiber unit 140 having the same cross-sectional area are distributed and disposed between the power line units 110a, 110b, and 110c, The structural stability of the substrate 100 can be improved. That is, when the ground wire units 120a and 120b and the optical fiber unit 140 have different sizes, eccentricity may occur when the ground wire units 120a and 120b and the optical fiber unit 140 are coupled. As described above, the structural stability can be improved by forming the grounding wire units 120a and 120b and the optical fiber unit 140 to have substantially the same cross-sectional area and distributing them between the power line units 110a, 110b and 110c.

The ground wire units 120a and 120b and the optical fiber unit 140 can be circumscribed to at least one power line unit of two adjacent power line units 110a, 110b and 110c. 3 and 4, the first ground wire unit 120a may be circumscribed with the first power line unit 110a or the second power line unit 110a, and the second ground line unit 120b may be surrounded by the first power line 110a, Unit 110a or the third power line unit 110c. Also, the optical fiber unit 140 can be circumscribed with the second power line unit 110b or the third power line unit 110c.

The sum of the cross-sectional areas of the conductors of all the grounding wire units 120a and 120b in the moving optical power signal cable 100 may be 50% or more of the cross-sectional area of the conductors of one power line unit. 3, the first and second grounding wire units 120a and 120b of the moving optical power signal cable 100 shown in FIG. 3 are connected to two individual bars, the area of the conductors of the first grounding wire unit 120a B1 of the first power line unit 110a and the area B2 of the conductor of the second ground line unit 120b may be 50% or more of the area A of the conductor of any one of the three power line units 110a. By setting the sum of the sectional areas of the conductors of the grounding wire units 120a and 120b to 50% or more of the cross-sectional area of the conductor of one power line unit, it is possible to secure a sufficient grounding force even when the power line unit transmits a high voltage of three- have.

The optical fiber unit 140 may comprise an optical fiber core wire 141, a loose tube 142, a filler 144, and a sheath layer 143.

The loose tube 142 constituting the optical fiber unit 140 is made of a plastic resin such as polypropylene (PP), polybutylene terephthalate (PBT), polycarbonate (PC), polyamide such as nylon-12 And may preferably be composed of polybutylene terephthalate (PBT). The polybutylene terephthalate (PBT) resin is excellent in flexibility and mechanical strength, and has a high crystallization speed, so that it has a small shrinkage in the longitudinal direction after manufacturing the loose tube 142.

The rouge tube 142 may have a tube shape and the optical fiber core wire 141, the filler 144, etc. may be mounted therein. Here, the outer diameter / inner diameter of the loose tube 142 is determined according to the use of the cable 100, and the standard is the number of the optical fiber core wires 141 mounted inside the loose tube 142, The content of the filler 144, the flexural characteristics required of the cable 100, and the like.

A predetermined number of the optical fiber cores 141 may be mounted in the loose tube 142 forming the optical fiber unit 140. The number of the optical fiber cores 141 mounted in the loose tube 142 may be one, two, or three or more as necessary. That is, the number of the optical fiber core lines 141 may vary depending on the data transmission efficiency of the optical fiber unit including the optical fiber core unit 141, the flexibility of the cable, and the like.

Each optical fiber core wire 141 has a double cylindrical structure in which a portion called a core in the center is surrounded by a portion called a cladding in the periphery, and the core is made of a silica material having a high refractive index Glass cladding is made of silica glass or synthetic resin having a refractive index relatively lower than that of the core so that light passing through the center portion is totally reflected to transmit a signal To be able to implement the role. The multimode optical fiber core wire having a diameter of several micrometers and having a diameter of several micrometers may be classified as a single mode optical fiber core wire or a multimode optical fiber core wire and may be classified into a stepped type or a hill type optical fiber core wire depending on the refractive index distribution of the core.

In the present invention, it is preferable that the optical fiber core wire 141 is a multimode optical fiber in order to facilitate the optical fiber connection operation in the connecting operation.

The filler 144 may be filled in the loose tube 142 together with the optical fiber core wire 141. Stress may be applied to the optical fiber core wire 141 due to the contact between the optical fiber core wires 141 or between the optical fiber core wire 141 and the loose tube 142, thereby causing signal loss.

Accordingly, the filler 144 can reduce the friction between the optical fiber cores 141 or between the optical fiber cores 141 and the loose tube 142, thereby reducing the stress therebetween.

The filler 144 may be a waterproof powder or a jelly compound. The waterproof powder is a super absorbent polymer (SAP), and has a property of absorbing water up to tens to hundreds of times its own weight, so as to prevent water from penetrating into the loose tube 142 It is suitable for use. The waterproof powder may be a polyacrylate-based, PVA maleic acid reactant, an isobutylene maleic acid copolymer, a polyacrylonitrile polymer, a polyethylene oxide-substituted starch acrylonitrile polymer, a starch acrylic acid graft polymer, or the like.

The signal line unit 130 may include a plurality of signal lines including a conductor and an insulating layer covering the conductor, and a plurality of signal line units 130 may be dispersedly disposed within the moving optical power signal cable 100. Referring to FIG. 1, each of the signal line units 130 includes a power line unit 110a, 110b, and 110c, a ground line unit 120a, and a power line unit 110c adjacent to each other, The signal line unit 130 is disposed in a space defined by the outer surface of the adjacent power line units 110a, 110b and 110c and the outer surface of the ground line units 120a and 120b And disposed in a space defined by the outer surface of the power line units 110b and 110c adjacent to each other and the outer surface of the optical fiber unit 140 so as to be dispersedly disposed within the moving optical power signal cable 100. [

 More specifically, each of the signal line units is connected between the first power line unit 110a and the first ground line unit 120a, between the second power line unit 110b and the first ground line unit 120a, between the second power line unit 110b Between the third power line unit 110c and the optical fiber unit 140 and between the third power line unit 110c and the second ground line unit 120b and between the third power line unit 110c and the optical fiber unit 140, And may be dispersedly disposed between the second grounding line units 120b.

Since a plurality of signal line units 130 are dispersedly arranged in the optical power signal cable 100 for movement, when a part of the signal line unit 130 is disconnected due to bending stress, it is possible to use another signal line unit 130 which is not disconnected The problem of interruption of signal transmission due to bar and disconnection can be solved.

Further, the signal line unit 130 can be disposed in a common outer line of the power line units 110a, 110b, and 110c and the ground line units 120a and 120b. 4, the signal line unit 130 includes a region S1 in the common external line L1 between the first power line unit 110a and the first ground line unit 120a, a second power line unit 110b A region S2 in the common external line L2 of the first ground wire unit 120a and a region S3 in the common external line L3 of the second power line unit 110b and the optical fiber unit 140, A region S4 within the common external line L4 between the first power line unit 110c and the optical fiber unit 140, a region S5 within the common external line L5 between the third power line unit 110c and the second grounding line unit 120b, And may be disposed in a region S6 within the common external line L6 between the power line unit 110a and the second ground line unit 120b.

Thus, the signal line unit 130 is disposed in the common line between the power line units 110a, 110b and 110c and the ground line units 120a and 120b. Thus, the outermost layer of the movable optical power signal cable 100, The influence of the signal line unit 130 on the impact or stress from the outside of the sheath layer 151 can be reduced and the risk of disconnection of the signal line unit 130 due to external impact or stress can be reduced have.

The total cross-sectional area of the conductors of the plurality of signal line units may be less than or equal to 50% of the cross-sectional area of the conductors of one ground line unit 120a or 120b.

The moving optical power signal cable 100 according to the present invention can be used in a case where the optical power signal cable 100 is excessively fatigued and stressed by repeating winding and winding on a reel or the like, Even when the load on the lower layer cable is increased, the optical fiber unit 211 and the like inside the moving optical power signal cable 100 are effectively protected, thereby maintaining a relatively long service life.

In addition, by structuring the ground wire unit and the optical fiber unit at the same size and dispersing the plurality of signal line units 130, it is possible to improve the structural safety of the optical power cable 100 for movement, It is possible to prevent the signal transmission due to disconnection from being interrupted by using another signal line unit even when some signal line unit 130 is disconnected by an external force.

The sheath layer 151 surrounds the power line units 110a, 110b and 110c, the grounding line units 120a and 120b, the optical fiber unit 140 and the signal line unit 130, As shown in FIG.

The inside of the sheath layer 151 may be filled with a filler 152. The filling material 152 may be made of the same material as the sheath layer 151. As an example, the sheath layer 151 and the filler material 152 may be made of a rubber-based material or polyurethane.

A fiber braided layer 153 disposed between the sheath layer 151 and the filler 152 may be provided.

The fiber braided layer 153 is a braid structure such as a synthetic resin such as polyamide or polyester or a high strength fiber such as glass fiber or aramid fiber and has a mechanical strength of a sheath layer 151 for protecting the moving optical power signal cable 100 And it is possible to improve the restoring force when the movable optical power signal cable 100 is twisted.

5 is a view showing an example in which a moving optical power signal cable 100 according to an embodiment of the present invention is used in a ship.

Referring to FIG. 5, the moving optical power signal cable 100 according to an embodiment of the present invention can be used as a power supply cable for a ship. In other words, when the ship 10 is moored in the port 20, the power of the ship 10 is produced by operating the engine of the ship 10 conventionally. However, the operation of the engine of the ship 10, There is a problem that the environment of the harbor is polluted due to the discharge of sulfur dioxide gas and recently the operation of the engine of the ship 10 and the use of the ship 10 as a power source of the ship 10 while the ship 10 is anchored in the harbor 20 As shown in FIG. 5, power is supplied from the port 20 during the berthing of the ship 10.

The moving optical power signal cable 100 according to an exemplary embodiment of the present invention can transmit power between the ship 10 and the power source of the port 20. [ That is, the moving optical power signal cable 100 according to an embodiment of the present invention can be used as an example of an alternate maritime power supply (AMP) that supplies onshore electricity to a ship when the ship is struck.

The moving optical power signal cable 100 is wound on the reel 11 of the ship 10 and is released from the reel 11 while the ship 10 is anchored to the harbor 20, 21).

The moving optical power signal cable 100 may have a plug 101 at one end thereof to be connected to the power supply socket 21 of the port 20. [ It is possible to confirm whether or not the plug 101 is correctly connected to the power supply socket 21 through the signal line unit 130. [ That is, if the connection between the plug 101 and the power supply socket 21 is correct, the signal is transmitted through the signal line unit 130. However, if the connection between the plug 101 and the power supply socket 21 is not correct, The signal is not transmitted through the antenna 130.

Signal line units that are not used for signal transmission among the signal line units 130 are disposed in the plug 101 and other signal line units 130 may be used when some signal line units 130 are disconnected.

100: Movable optical power signal cable
110a, 110b, 110c: power line unit
120a, 120b: Ground wire unit
130: signal line unit
140: Optical fiber unit

Claims (20)

A plurality of power line units each composed of a conductor and an insulating layer covering the conductor;
A plurality of ground line units disposed between adjacent power line units;
An optical fiber unit having at least one optical fiber core wire and a tube for mounting the optical fiber core wire;
A signal line unit comprising a plurality of signal lines; And
A sheath layer surrounding the power line unit, the ground line unit, the optical fiber unit, and the signal line unit; And,
Wherein the optical fiber unit and the grounding line units are distributedly disposed between adjacent power line units,
Wherein each of the signal line units is distributed and disposed between the power line unit and the ground line unit which are adjacent to each other and between the adjacent power line units and the optical fiber unit. The method according to claim 1,
Wherein said power line unit comprises a first power line unit for supplying three-phase power, a second power line unit and a third power line unit. 3. The method of claim 2,
Wherein the ground wire unit comprises a first ground wire unit and a second ground wire unit,
Wherein the first ground wire unit is disposed between the first power line unit and the second power line unit and the second ground line unit is disposed between the first power line unit and the third power line unit. Power signal cable. The method of claim 3,
And the optical fiber unit is disposed between the second power line unit and the third power line unit. 5. The method of claim 4,
Wherein each of the signal line units is connected between the first power line unit and the first ground line unit, between the second power line unit and the first ground line unit, between the second power line unit and the optical fiber unit, The first power line unit and the second ground line unit, between the optical fiber unit, between the third power line unit and the second ground line unit, and between the first power line unit and the second ground line unit. The method according to claim 1,
Wherein the ground wire unit is in contact with at least one of the power line units of two adjacent power line units. The method according to claim 1,
Wherein the optical fiber unit is in contact with at least one of the power line units of two adjacent power line units. The method according to claim 1,
Wherein the signal line unit is disposed in a common external line of the power line unit and the ground line unit or in a common external line of the power line unit and the optical fiber unit. The method according to claim 1,
Wherein the power line units are external to each other. The method according to claim 1,
Sectional area of a conductor of the ground wire unit corresponds to at least 50% of a cross-sectional area of a conductor of one power line unit. The method according to claim 1,
Wherein the diameter of the optical fiber unit is 90% to 110% of the diameter of the ground wire unit. The method according to claim 1,
Wherein a total cross-sectional area of conductors of the plurality of signal line units is smaller than or equal to 50% of a cross-sectional area of a conductor of one of the ground wire units. The method according to claim 1,
Wherein the signal line unit is disposed apart from the inner side of the sheath layer. The method according to claim 1,
Wherein the sheath layer is filled with a filler material. 15. The method of claim 14,
Further comprising a fiber braided layer disposed between the sheath layer and the filler. 15. The method of claim 14,
Wherein the sheath layer and the filler material are made of the same material. 15. The method of claim 14,
Wherein the filler is made of a rubber-based material or polyurethane. The method according to claim 1,
Further comprising a plug connected to the end of the movable optical power signal cable and capable of engaging with a socket box of the power supply unit. 19. The method of claim 18,
And signal line units not used for signal transmission among the signal line units are disposed in the plug. The method according to claim 1,
Wherein the movable optical power signal cable connects the ship with an Alternative Maritime Power (AMP) and transmits power from the land-based power supply to the ship.

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