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STACIR STACIR/TW CONDUCTOR


STACIR/AW conductors are suited for re-conductoring applications. The capacity of existing transmission line can be enhanced by simply replacing the existing conductor without any modification to the tower.



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STACIR

Super Thermal Alloy Conductor Invar Reinforced (STACIR) conductor has outer layers composed of Super Thermal Aluminium (STAL) alloy wires that can operate up to 210°C (410°F). The inner core is composed of aluminium clad INVAR wires. INVAR is a metal alloy with 36% Ni in steel.

APPLICATION

STACIR/AW conductors are suited for re-conductoring applications. The capacity of existing transmission line can be enhanced by simply replacing the existing conductor without any modification to the tower.

BENEFITS

Can carry 100% more current than that of ACSR of the same size, while maximum sag and maximum working tension remain the same as that of ACSR.

No modification or reinforcement is required to existing towers for uprating transmission and distribution lines.

TECHNICAL SPECIFICATIONS

PROPERTIES STACIR (ACSR MOOSE EQUIVALENT) STACIR (ACSR ZEBRA EQUIVALENT) STACIR (ACSR PANTHER EQUIVALENT
Typical factors 3.53 mm 0.1390 in 3.18 mm 0.1252 in 3.00 mm 0.1181 in
Reference specifications IEC 62004 IEC 62004 IEC 62004
Total cross section area 597.00 mm2 0.9254 in2 484.50 mm2 0.751 in2 261.50 mm2 0.4054 in2
Conductive wire Al Zr AT3 Al Zr AT3 Al Zr ATI
Core wire Aluminium clad Invar Aluminium clad Invar Aluminium clad Invar
Conductor diameter 31.77 mm 1.2508 in 28.62 mm 1.1268 in 21.00 mm 0.8268 in
Weight 1993 1339.2 1582 1063.1 939 631.0
kg/gm Ibs/mile kg/km Ibs/mile kg/km Ibs/mile
Ultimate tensile strength 14641 kg 32277.84 lbs 11968 kg 26384.89 lbs 8436 kg 18598.17 lbs
DC resistance at 0.06 0.09 0.07 0.11 0.13 0.21
20°C temperature Q/km Q/mile Q/km Q/mile Q/km Q/mile
Maximum operating temperature 210°C 410°F 210°C 410°F 210°C 410°F
Current carrying capacity at maximum operating temperature 1871 Amp 1626 Amp 1040 Amp
MORE

Assumptions: Ampacity is calculated based on, 45°C (113。F) ambient temperature, 0.6 m/s wind velocity, 0.5 as coefficient of solar absorption, 0.6 as coefficient of emmisivity and 1200 wt/sqm coefficient for solar radiation, at sea level.

Super-Thermal Resistant Aluminum Alloy Conductors, Aluminum-clad Invar Reinforced

Application

Hi-STACIR/AW, STACIR/AW is normally used to up-rate an existing transmission line by simply replacing the exisitng conductor without tower modification or reinforcement.

Standard

IEC, ASTM, JCS 1405

Construction

Core Wire (INVAR) : Aluminum-clad INVAR Wire/High Tensile Strength Aluminum-clad INVAR Wire Conductor (STAl) : Super Thermal Resistant Aluminum Alloy Wire used for continuous allowable temperature up to 210℃

Characteristics

Double current carrying capacity of the same size ACSR No limitation for application area : Heavy wind, snow & galloping area Equivalent Sag-tension properties to conventional ACSR No modification & reinforcement on existing tower Easy installation with same method & equipments as ACSR’s Low cost and short construction period Proved long-term reliability

STACIR/AW Hi-STACIR / AW

* INVAR : INVARiable to change of temperature (a kind of Nickel-Ferrous Alloy)

STAl Wire

Standard Diameter   (mm) Tolerance of Dia.   (mm)   Tensile Strength (kgf/mm2) Elongation on 250mm(%) Min Reference
Cross- sectional Area (mm2) Weight   (kg/km) breaking Load (kgf) DC Resistance at 20℃ (Ω/km)
  Min.   Avg
Min. Avg (Min.)
2.6 ±0.03 17.2 18.3 1.5 5.309 14.33 91.3 97.2 5.41
3.2 ±0.04 16.5 17.6 1.7 8.042 21.71 133 142 3.57
3.38 ±0.04 16.5 17.6 1.7 8.973 24.23 148 158 3.20
3.7 ±0.04 16.5 17.2 1.8 10.75 29.03 177 185 2.67
4.0 ±0.04 16.2 16.9 1.9 12.57 33.94 204 212 2.29
4.5 ±0.04 16.2 16.9 2.0 15.90 42.93 258 269 1.81
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Aluminum-clad INVAR Wire

Standard Diameter (mm) Tolerance of Dia. (mm) Tensile Strength (kgf/mm2) Elongation Min. (%) No. of Twists (Nos.) Conductivity (%IACS) Properties of Aluminum Reference
Thickness (mm) Wrapping Aluminum Thickness (mm) Cross- sectional Area (mm2) Weight (kg/km) breaking Load (kgf) Coefficient of Linear Expainsion Modulus of   Elasticity (kgf/mm2)
15℃~230℃ (x10-6/℃) 230℃~290℃ (x10-6/℃)
2.47 ±0.05 110 1.5 20 14 0.06 No separation between aluminum and invar core or no breakage 0.15 4.790 34.02 527 3.7 10.8 15,500
2.6 ±0.05 110 1.5 20 14 0.06 0.15 5.309 37.69 584 3.7 10.8 15,500
3.1 ±0.06 110 1.5 20 14 0.07 0.17 7.548 53.48 830 3.7 10.8 15,500
3.2 ±0.06 110 1.5 20 14 0.07 0.17 8.042 57.10 885 3.7 10.8 15,500
3.38 ±0.07 110 1.5 20 14 0.08 0.18 8.973 63.71 987 3.7 10.8 15,500
3.5 ±0.07 110 1.5 20 14 0.08 0.18 9.621 68.31 1.060 3.7 10.8 15,500
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High Tensile Strength Aluminum-clad INVAR Wire

Standard Diameter   (mm) Tolerance of Dia.   (mm) Tensile Strength   (kgf/mm2) Elongation Min.   (%) No. of Tweists   (Nos.) Conductivity       (%IACS) Properties of Aluminum Reference
Thickness   (mm) Wrapping Aluminum Thickness (mm) Cross- sectional Area (mm2) Weight   (kg/km) breaking Load (kgf) Coefficient of Linear Expainsion Modulus of   Elasticity (kgf/mm2)
15℃~230℃ (x10-6/℃) 230℃~290℃ (x10-6/℃)
2.47 ±0.05 125 1.5 20 14 0.06 No  separation between aluminum and invar core or no breakage 0.15 4.790 34.02 599 3.7 10.8 15,500
2.6 ±0.05 120 1.5 20 14 0.06 0.15 5.309 37.69 637 3.7 10.8 15,500
3.1 ±0.06 120 1.5 20 14 0.07 0.17 7.548 53.48 906 3.7 10.8 15,500
3.2 ±0.06 120 1.5 20 14 0.07 0.17 8.042 57.10 965 3.7 10.8 15,500
3.38 ±0.07 120 1.5 20 14 0.08 0.18 8.973 63.71 1.077 3.7 10.8 15,500
3.5 ±0.07 120 1.5 20 14 0.08 0.18 9.621 68.31 1.155 3.7 10.8 15,500
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STACIR / AW

Conductor Size   (mm2) Stranding (Nos./mm) Min. Breaking Load (kgf) Overall Diameter   (mm) Reference
Cross-sectional Area (mm2) Weight (kg/km) Modulus of   Elasticity (kgf/mm2) Coefficient of Linear Expansion (10-6/℃) DC Resistance at 20℃ (Ω/km) Current Carrying Capacity (A)
STAl INVAR STAl INVAR Total STAl INVAR Total
160 30/2.6 7/2.6 6,140 18.20 159.30 37.16 196.46 441.7 265.2 706.9 8,040 16.0 0.1745 909
240 30/3.2 7/3.2 9,170 22.40 241.30 56.29 297.59 669.1 401.7 1070.8 8,040 16.0 0.1159 1,203
330 26/4.0 7/3.1 10,000 25.30 326.80 52.84 379.64 905.1 377.0 1282.1 7,580 17.5 0.0869 1,452
410 26/4.5 7/3.5 12,720 28.50 413.40 67.35 480.75 1145.5 480.6 1626.1 7,590 17.5 0.0686 1,708
480 (Rail) 45/3.7 7/2.47 10,500 29.61 483.84 33.54 517.38 1340.7 239.3 1580.0 6,900 20.0 0.0600 1,812
480 (Cardinal) 54/3.38 7/3.38 13,280 30.42 484.52 62.81 547.33 1343.5 452.2 1795.7 7,470 18.3 0.0591 1,846
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Hi-STACIR/AW

Conductor Size   (mm2) Stranding (Nos./mm) Min. Breaking Load (kgf) Overall Diameter   (mm) Reference
Cross-sectional Area (mm2) Weight (kg/km) Modulus of   Elasticity (kgf/mm2) Coefficient of Linear Expansion (10-6/℃) DC Resistance at 20℃ (Ω/km) Current Carrying Capacity (A)
STAl INVAR STAl INVAR Total STAl INVAR Total
160 30/2.6 7/2.6 6,500 18.20 159.30 37.16 196.46 441.7 265.2 706.9 8,040 16.0 0.1745 909
240 30/3.2 7/3.2 9,700 22.40 241.30 56.29 297.59 669.1 401.7 1070.8 8,040 16.0 0.1159 1,203
330 26/4.0 7/3.1 10,500 25.30 326.80 52.84 379.64 905.1 377.0 1282.1 7,580 17.5 0.0869 1,452
410 26/4.5 7/3.5 13,300 28.50 413.40 67.35 480.75 1145.5 480.6 1626.1 7,590 17.5 0.0686 1,708
480 (Rail) 45/3.7 7/2.47 11,000 29.61 483.84 33.54 517.38 1340.7 239.3 1580.0 6,900 20.0 0.0600 1,812
480 (Cardinal) 54/3.38 7/3.38 13,800 30.42 484.52 62.81 547.33 1343.5 452.2 1795.7 7,470 18.3 0.0591 1,846
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Comparison with Conventional ACSR

Conductor Size (mm2) Stranding   (Nos./mm) Weight   (kg/km) Overall Diameter (mm) Breaking Load (kgf) DC Resistant at 20℃ (Ω/km) Modulus of Elasticity ① (kgf/mm2) Coefficient  of Linear Expansion ② (x10-6/℃) Continuous Current Capacity (A)
    160   ACSR HAl 30/2.6   732.8   18.2   6,990   0.182   9,080   18.0 454 (90℃)
St 7/2.6
  Hi-STACIR/AW STAl 30/2.6   706.9   18.2   6,500   0.1745   8,040 (15,500)   16.0 (3.7) 909 (210℃)
INVAR 7/2.6
    240 ACSR HAl 30/3.2 1,110 22.4 10,210 0.139 9,080 18.0 593 (90℃)
St 7/3.2
  Hi-STACIR/AW STAl 30/3.2   1,070.8   22.4   9,700   0.1159   8,040 (15,500)   16.0 (3.7) 1,203 (210℃)
INVAR 7/3.2
    330 ACSR HAl 26/4.0 1,260 25.3 10,950 0.0873 8,360 19.0 714 (90℃)
St 7/3.1
Hi-STACIR/AW STAl 26/4.0 1,282.1 25.3 10,500 0.0869 7,580 (15,500) 17.5 (3.7) 1,452 (210℃)
INVAR 7/3.1
    410 ACSR HAl 26/4.5 1,673 28.5 13,890 0.0702 8,360 19.0 829 (90℃)
St 7/3.5
  Hi-STACIR/AW STAl 26/4.5   1,626.1   28.5   13,300   0.0686   7,590 (15,500)   17.5 (3.7) 1,708 (210℃)
INVAR 7/3.5
    480 (Rail) ACSR HAl 45/3.7 1,599 29.61 11,800 0.05994 7,250 20.8 891 (90℃)
St 7/2.47
  Hi-STACIR/AW STAl 45/3.7   1,580   29.61   11,000   0.0600   6,900 (15,500)   20.0 (3.7) 1,812 (210℃)
INVAR 7/2.47
    480 (Cardinal) ACSR HAl 54/3.38 1,836 30.42 15,300 0.0599 7,990 19.5 899 (90℃)
St 7/3.38
Hi-STACIR/AW STAl 54/3.38 1,795.7 30.42 13,800 0.0591 7,470 (15,500) 18.3 (3.7) 1,846 (210℃)
INVAR 7/3.38
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