Infrastructure power cables/attached equipment Distribution power lines Low wind pressure insulated wires
Daiden Co., Ltd.
About This Product
■Product features
・Since it is possible to use lower-strength concrete poles than round electric wires, it is possible to reduce equipment costs.
・Compared to round electric wires, it is possible to have longer spans, reducing the number of poles installed.
・Longer utility poles can be used (resolving the problem of separation distance).
・It is possible to increase the capacity of the distribution line (increase the wire size) without reinforcing the support.
・Even if the safety factor of supports has decreased due to shared racks, etc., the safety factor can be restored by replacing the wires with low wind pressure wires.
・For newly constructed lines, not only the poles but also the branch lines and anchors can be made smaller.
characteristics
■Mechanism of wind pressure reduction
A large vortex called a Karman vortex is generated behind a wire placed in a wind current. The air pressure in this vortex is lower than outside, so the pressure difference with the front creates a large wind pressure on the wire. On the other hand, when grooves are applied to the wire surface, the flow of wind along the surface becomes turbulent, and the wind sticks to the surface for a long time.As a result, the area of low pressure behind the wire is reduced and the wind pressure is reduced. will be done.
■Wind pressure characteristic example
This low wind pressure insulated wire was jointly developed with Kyushu Electric Power Co., Inc., and its wind pressure characteristics were confirmed through wind tunnel experiments at the Institute of Applied Mechanics, Kyushu University. In addition, this product was commercialized with the help of the same research institute, which provided fluid dynamics technology and advice on field testing methods.
■Results of field tests on snow-repellent effects
It has been confirmed through four years of field tests that the snow-repellent performance of low wind pressure electric wires is equivalent to that of SN (finned) electric wires.
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Product
Infrastructure power cables/attached equipment Distribution power lines Low wind pressure insulated wires
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Handling Company
Daiden Co., Ltd.
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Categories
8 Models of Infrastructure power cables/attached equipment Distribution power lines Low wind pressure insulated wires
Items marked with have different values depending on the model number.
Click on the part number for more information about each product
| Product Image | Part Number | Price (excluding tax) | AC maximum conductor resistance (90℃) (Ω/km) | Approximate mass (kg/km) | Conductor composition Aluminum (pieces/shape) | Conductor composition Steel (pcs/mm) | Conductor continuous allowable temperature (℃) | Conductor outer diameter approx. (mm) | Continuous allowable current (A) | DC maximum conductor resistance (20℃) (Ω/km) | Finished outer diameter approx. (mm) | Insulator thickness approx. (mm) | Mechanical properties Conductor tensile load (kN) | Mechanical properties Elastic modulus (kN/mm2) | Mechanical properties Linear expansion coefficient (1/K) | Minimum insulation resistance (20℃) (MΩ･km) | Number of grooves (pieces), groove depth approx. (mm) | Reactance (900mm between equivalent lines) (Ω/km) | Wind pressure load 45m/s | Wind pressure load 50m/s | Wind pressure load Class A (40m/s) (Pa) | Wind pressure load Class C (28m/s) (Pa) | Withstand voltage (kV/1 minute) |
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6.6kV RW-ACSR/AC-OC (120㎟) |
Available upon quote | 0.369 | 560 | 6/SB | 1/4.2 | 90 | 13.6 | 315 | 0.24 | 19.4 | 2.9 | 30.67 | 70.8 | 208×10^-7 | 1,000 | 24,0.42 | 0.387 | 900 | 1,140 | 700 | 425 | 12 |
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6.6kV RW-AL-OC (200㎟) |
Available upon quote | 0.193 | 755 | 19/SB | - | 90 | 17 | 455 | 0.15 | 23.6 | 3.3 | 26.28 | 61.8 | 230×10^-7 | 1,000 | 24,0.38 | 0.37 | 920 | 1,170 | 710 | 410 | 12 |
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6.6kV RW-AL-OC (240㎟) |
Available upon quote | 0.162 | 880 | 19/SB | - | 90 | 19 | 510 | 0.126 | 25.4 | 3.4 | 29.9 | 61.8 | 230×10^-7 | 1,000 | 18,0.48 | 0.364 | 910 | 1,150 | 710 | 480 | 12 |
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6.6kV RW-AL-OC (400㎟) |
Available upon quote | 0.0982 | 1,400 | 37/SB | - | 90 | 23.8 | 700 | 0.0757 | 30.4 | 3.3 | 52.56 | 61.8 | 230×10^-7 | 1,000 | 18,0.44 | 0.345 | 850 | 940 | 780 | 550 | 12 |
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22/33kV RW-ACSR/AC-OC (120㎟) |
Available upon quote | 0.369 | 585 | - | 1/4.2 | 90 | 13.6 | 310 | 0.24 | 20.2 | 3.3 | 30.67 | 70.8 | 208×10^-7 | 1,500 | 24,0.35 | 0.387 | 900 | 1,120 | 730 | 440 | Twenty five |
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22/33kV RW-AL-OC (200㎟) |
Available upon quote | 0.193 | 785 | 19/SB | - | 90 | 17 | 455 | 0.15 | 24.6 | 3.8 | 26.28 | 61.8 | 230×10^-7 | 1,500 | 18,0.50 | 0.37 | 900 | 1,110 | 720 | 490 | Twenty five |
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22/33kV RW-AL-OC (240㎟) |
Available upon quote | 0.162 | 920 | 19/SB | - | 90 | 18.6 | 505 | 0.126 | 26.4 | 3.9 | 29.9 | 61.8 | 230×10^-7 | 1,500 | 18,0.50 | 0.364 | 910 | 1,170 | 700 | 470 | Twenty five |
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22/33kV RW-AL-OC (400㎟) |
Available upon quote | 0.0982 | 1,440 | 37/SB | - | 90 | 23.8 | 690 | 0.0757 | 31.4 | 3.8 | 52.56 | 61.8 | 230×10^-7 | 1,500 | 18,0.46 | 0.345 | 860 | 930 | 800 | 550 | Twenty five |
Click on the part number for more information about each product
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About Company Handling This Product
- Japan