Conductors / Ground wire (Overhead Cable)

Feature

In order to satisfy the varied demands of our customers, such as increased power transmission supply, harmony with the environment, and the communications functions required by an advanced information-oriented society, We has been supplying various types of overhead conductors including the typical type ACSR (Aluminum Conductor Steel Reinforced), OPGW (Optical Fiber Ground Wire), thermal resistant conductors, low-sag conductors and environmental harmony conductors (noise, appearance, snow).

We has recently developed a new low-sag aluminum conductor called ACFR (Aluminum Conductor Carbon Fiber Reinforced) that has a special CFCC(Carbon Fiber Composite Cable) core, rather than the conventional steel core. This conductor is already being supplied successfully to our domestic customers in Japan.

Purpose

• Conductors for overhead transmission lines
• Ground wires for overhead transmission lines

Conductors for overhead transmission lines

• Types of ACSRs
• Types of thermal resistant ACSRs
• Types of low-sag conductors
• Types of environmental harmony conductors
• （T）ACFR

ACFR 160mm²(left) TACFR 160mm²(right)
A new low-sag conductor ((T)ACFR)

Ground wires for overhead transmission lines

• AC,GSW
• OPGW

Low-noise conductor

Optical fiber ground wire (OPGW)

Specifications

Characteristics of （T）ACFR 160mm²

Conductors		ACSR	(T)ACFR
Nominal size[mm2]		160	160
Strands[Number/mm]		AL 30/2.6 ST 7/2.6	AL 30/2.6 CFCC 1/7.8
Outer diameter[mm]		18.2	18.2
Calculated cross-sectional area[mm2]		196.5	196.5
Weight[kg/km]		732.8	502.5
Tensile strength[kN]		Min. 68.4	Min. 68.9
Modulus of elasticity[mm2]	Transition temp. or below	89,100	76,000
	Above transition temp.	206,000	137,000
Co-efficient of linear expansion[/゜C]	Transition temp. or below	18.0×10-6	15.5×10-6
	Above transition temp.	11.5×10-6	1.0×10-6
DC resistance at 20゜C[Ω/km]		0.182(0.185)	0.182(0.185)
Continuous current capacity[A]		454[ 90゜C] (705[150゜C])	454[ 90゜C] (705[150゜C])
Cross sectional view

Characteristics of low-noise conductor (LN-ACSR) 940mm²

Conductors	LN-ACSR	A standard comparable ACSR
Nominal size[mm2]	940	810
Strands[Number/mm]	AL　2/SB(5.53) +4/SB(6.26) +14/SB(5.54) +24/4.8 ST　7/3.2	AL　45/4.8 ST 7/3.2
Outer diameter[mm]	38.4	38.4
Calculated cross-sectional area[mm2]	999.4	870.8
Weight[kg/km]	3,056	2,700
Tensile strength[kN]	Min. 197.5	Min. 180.9
Cross sectional view

Typical type of OPGW

Conductors	Loose type (Al tube)	Cross sectional view
Cross sectional view