LL-(T)ACSR/AS APPLICATION:
LL-(T)ACSR/AS used for overhead power transmission line.
LL-(T)ACSR/AS Construction:
The center is extra high strength aluminum-clad steel (EAS), the outer layer is alunimum (AL) or thermal-resistant aluminum alloy (TAL).
LL-(T)ACSR/AS Characteristics:
Conductor temperature in normal operation:
LL-ACSR/AS: 900C
LL-TACSR/AS: 1500C
LL-(T)ACSR/AS Advantages:
Reducing transmission losses by 10 ~ 25 %.
Almost the same tower loading as conventional ACSR (Same diameter, same mechanical strength).
Better corrosion resistance than conventional ACSR due to Aluminum-clad steel (AS) core.
Same installation & maintenance procedure as conventional ACSR
LL-(T)ACSR/AS DESIGN TYPE
Low loss conductor has 2 types of design, depending on the purpose or situation of each project.
TYPICAL SIZE OF 3L CONDUCTOR AND SPECIFICATION
| Item description | Cross sectional area sqmm | Conductor Diameter (mm) | Linear Weight (kg/km) | DC Resistance at 20 Deg C (Ohm/km) | Tensile strength (kN) | *Max Current Carrying capacity 85 Deg C | Modulus of elasticity Gpa | Coecient Of linear Expansion Per deg |
|---|---|---|---|---|---|---|---|---|
| 3L Panther Conductor | 353 | 22.00 | 974 | 0.0817 | 61.4 | 617 | 56.5 | 23 X 10-6 |
| 3L Dog Conductor | 177 | 15.65 | 484 | 0.1635 | 30.9 | 395 | 56.5 | 23 X 10-6 |
| SR. NO. | DESCRIPTION | ACSR PANTHER | 3L PANTHER |
|---|---|---|---|
| 1 | Ampacity at 40 MW @ 0.8 PF | 437 | 437 |
| 2 | AC resistance at 40 MW | 0.1747 | 0.0989 |
| 3 | Conductor temp | 82 | 71 |
| 4 | Losses at 40 MW @ 0.3 LLF (KWH) | 601 | 340 |
| 5 | Difference in losses (KWH) | N/A | -261 |
Note: Voltage - 66 Kv, carrying 40 MW Power, Line length - 20 Ckm. | 3L Panther has 43.4% less loss than ACSR Panther.
Losses comparison with ACSR Dog & 3L Conductors
| SR. NO. | DESCRIPTION | ACSR DOG | 3L DOG |
|---|---|---|---|
| 1 | Ampacity at 28 MW @ 0.8 PF | 302 | 302 |
| 2 | AC resistance at 28 MW | 0.3519 | 0.1981 |
| 3 | Conductor temp | 85 | 72 |
| 4 | Losses at 28 MW @ 0.3 LLF (KWH) | 577 | 325 |
| 5 | Difference in losses (KWH) | N/A | -252 |
Note: Voltage - 66 Kv, carrying 28 MW Power, Line length - 20 Ckm. | 3L Dog has 43.67% less loss than ACSR Dog.
