Aluminium Clad Steel wire - Aluminium Tube - Flat wire - Overhead conductor - Fittings and accessories
TREFINASA is a company stablished in 1999 with the first objective of manufacturing aluminium clad steel (ACS) wire. These wires are used in electrical industry, more concretely in manufacturing optical ground wire (OPGW) and strands for conductors installed in overhead electrical lines. Trefinasa, by applying the same manufacturing process, manufactures aluminium tubes with optical fibre inside for OPGW conductors, as well as aluminium profiles for insulated cables, flat wires for the automotive, electrical and renewable industries and aluminium tubes for refrigeration, home appliances, automotive industry and rivets). Since 2018 and once the acquisition of the rights for MADE HERRAJES was completed, TREFINASA offers a complete solution including in its range of products the fittings for insulator string, bolted and compression clamps and accessories up to 500kV OHL. Trefinasa supplies to the most relevant European OPGW and ACSR manufactures, as well as to different electrical companies and appliance companies.
HTLS GAP Conductor - ACS and Alumoweld Wire
TREFINASA deployed in 2006 the manufacturing GAP technology for High Temperature Low Sag conductors. These conductors are able to dispatch more power and reduce joule losses at standard operating temperatures, keeping the same safety clearances than their equivalent hard drawn aluminium conductor due to the possibility to continuously run at higher operation temperature. Nowadays TREFINASA is developing the ACSS technology for High Temperature Low Sag conductors to complete the wide range of available products for the upgrade of existing OHL at a very beneficial investment-cost ratio.
Alambre de acero recubierto de aluminio (ACS)
DEFINICIÓN
El acero recubierto de aluminio para compresión, internacionalmente conocido como Alumoweld o ACS, es un cable de alta resistencia cuyo recubrimiento se somete a un proceso de extrusión que adhiere el aluminio mediante presión y calor.
Una vez finalizado el proceso, el cable se reduce hasta su diámetro final sin alterar el ratio de aluminio del acero.
PROPIEDADES
RESISTENCIA A LA CORROSIÓN
Debido al importante espesor del aluminio presente en el alambre (mínimo 10% de su radio), el ACS proporciona una excelente resistencia a la corrosión, equivalente al aluminio de calidad CE.
También el uso de ACS combinado con alambres de aluminio en conductores ACSR permite prevenir la corrosión galvánica que puede ocurrir al poner en contacto con diferentes metales.
ALTA CONDUCTIVIDAD
Si se compara con el cobre, el ACS presenta una conductividad del 14%, 20%, 27%, 30% o 40% según la capa de aluminio que utiliza (5%, 10%, 14%, 15%, 25% del radio).
Si se compara con el acero galvanizado, su conductividad es 3 veces mayor.
Para aplicaciones de alta frecuencia, donde el “efecto piel” es un factor importante (por ejemplo, descargar por rayo), la conductividad del ACS se aproxima al 100% de aluminio porque la densidad de la corriente eléctrica más alta se concentra en la parte externa del conductor.
RELACIÓN RESISTENCIA-PESO
Dentro de los diferentes tipos de alambres utilizados en las líneas eléctricas, el ACS ofrece la mejor relación resistencia-peso entre todos. Su carga de rotura es 8 veces más que el alambre de aluminio del mismo diámetro y poco más que el doble en cuanto al peso.
Si se compara con el cable de acero galvanizado del mismo diámetro y las mismas características mecánicas, el peso de ACS es un 15% menor, y sus características mecánicas se mantienen a lo largo del tiempo debido a la excelente protección ofrecida por la capa de aluminio.
APLICACIONES
Debido a sus excepcionales propiedades, este producto se emplea ampliamente en la industria del cable para fabricar Cable de Fibra Óptica (OPGW), cable trenzado convencional y núcleos de acero para conductores de fase, todos para líneas aéreas. También puede emplearse en otras aplicaciones, como elementos helicoidales para líneas aéreas o en aquellos cables en que la resistencia a la corrosión juegue un papel importante.
El cable ACS fabricado por TREFINASA cumple los requisitos de los principales estándares internacionales aplicables, es decir, IEC-1232, EN-61.232 y ASTM-B-415.
ASTM
Existing normative related with the Product
| Standard | Title |
|---|---|
| ASTM B502B502M | Aluminium-clad steel core wire for use in overhead electrical aluminium conductors |
| ASTM B415 | Hard-drawn aluminium clad steel wire |
ASTM B502
| Class | Diameter (mm) | Tensile Strength (MPa)Min | Stress al 1% extension (MPa)Min |
|---|---|---|---|
| AW2 | 1.95 to 3.27 | 1’344 | 1,206 |
| 3.27 to 3.48 | 1'310 | 1'172 | |
| 3.48 to 3.66 | 1'275 | 1'137 | |
| 3.66 to 3.93 | 1'241 | 1'103 | |
| 3.93 to 4.12 | 1'206 | 1'103 | |
| 4.12 to 4.39 | 1'172 | 1'068 | |
| 4.39 to 4.62 | 1'137 | 1'034 | |
| 4.62 to 4.77 | 1'103 | 1'000 | |
| AW3 | 1.95 to 2.28 | 1'450 | 1'310 |
| 2.28 to 3.04 | 1'410 | 1'280 | |
| 3.04 to 3.55 | 1'380 | 1'240 | |
| 3.55 to 4.77 | 1'340 | 1'170 |
ASTM B415
| Diameter | AWG | 20% | 27% | 30% | 40% |
|---|---|---|---|---|---|
| 5.19 | 4 | 1'070 | 862 | 703 | 552 |
| 4.78 | 1'100 | 889 | 731 | 579 | |
| 4.62 | 5 | 1'140 | 917 | 758 | 607 |
| 4.39 | 1'170 | 945 | 786 | 634 | |
| 4.11 | 6 | 1'210 | 972 | 814 | 662 |
| 3.93 | 1'240 | 1,000 | 841 | 676 | |
| 3.67 | 7 | 1'280 | 1,034 | 869 | 676 |
| 3.48 | 1'310 | 1,062 | 883 | 686 | |
| 3.26 | 8 | 1'340 | 1'076 | 883 | 686 |
| 2.91 | 9 | 1'340 | 1'076 | 883 | 686 |
| 2.59 | 10 | 1'340 | 1'076 | 883 | 686 |
| 2.30 | 11 | 1'340 | 1'076 | 883 | 686 |
| 2.05 | 12 | 1'340 | 1'076 | 883 | 686 |
Physical Constants
| Characteristics of wires | UNIT | Aluminium clad steel wire 20 % (AW2/AW3) | Aluminium clad steel wire 27% | Aluminium clad steel wire 30 % | Aluminium clad steel wire 40 % |
|---|---|---|---|---|---|
| Final modulus of elasticity | GPa | 162 | 140 | 132 | 109 |
| Coefficient of linear expansion | K-1 | 13x10-06 | 13.9x10-06 | 14.2x10-06 | 16x10-06 |
| Temperature coefficient of resistance to constant mass (α) | K-1 | 0.0036 | 0.0036 | 0.0038 | 0.0040 |
| Density | Kg/dm3 | 6.59 | 5.91 | 5.61 | 4.64 |
| Resistivity max. | ηΩ.m | 84.8 | 63.86 | 57.47 | 43.10 |
| Conductivity | % IACS | 20.3 | 27 | 30 | 40 |
| Aluminium minimum thickness | % radio | 10 | 14 | 15 | 25 |
| Aluminium proportion in cross section | % | 25 | 37 | 43 | 62 |
IEC/EN
Existing normative related with the Product
| Standard | Title |
|---|---|
| IEC-61232 EN-61232 | Aluminium-clad steel wires for electrical purposes |
| EN-50540 | Conductors for overhead lines – Aluminium conductors steel supported (ACSS) |
CHARACTERISTICS OF ALUMINIUM CLAD STEEL WIRE – EN/IEC
| Class | Diameter (mm) | Tensile Strength (MPa)Min. | Stress at 1% extension (MPa)Min. |
|---|---|---|---|
| 14 UHSA | 1.75 to 2.25 | 1965 | 1580 |
| 2.26 to 3.00 | 1900 | 1550 | |
| 3.01 to 3.50 | 1860 | 1515 | |
| 3.51 to 4.75 | 1825 | 1480 | |
| 14 EHSA | 1.75 to 2.25 | 1825 | 1550 |
| 2.26 to 3.00 | 1790 | 1500 | |
| 3.01 to 3.50 | 1760 | 1470 | |
| 3.51 to 4.75 | 1725 | 1430 | |
| 20 EHSA | 1.75 to 2.28 | 1620 | 1390 |
| 2.29 to 3.04 | 1580 | 1360 | |
| 3.05 to 3.55 | 1545 | 1330 | |
| 3.56 to 4.82 | 1515 | 1300 | |
| A-20 SA | 1.24 to 3.25 | 1340 | 1200 |
| 3.25 to 3.45 | 1310 | 1180 | |
| 3.45 to 3.65 | 1270 | 1140 | |
| 3.65 to 3.95 | 1250 | 1100 | |
| 3.95 to 4.10 | 1210 | 1100 | |
| 4.10 to 4.40 | 1180 | 1070 | |
| 4.40 to 4.60 | 1140 | 1030 | |
| 4.60 to 4.75 | 1100 | 1000 | |
| 4.75 to 5.50 | 1070 | 1000 | |
| B- 20SA | 1.24 to 5.50 | 1320 | 1100 |
| 27SA | 2.50 to 5.00 | 1080 | 800 |
| 30SA | 2.50 to 5.00 | 880 | 650 |
| 40SA | 2.50 to 5.00 | 680 | 500 |
Physical Constants
| Characteristics of wires | Unit | Aluminium clad steel wire 14 (E)(U)HSA | Aluminium clad steel wire 20 (EH)SA | Aluminium clad steel wire 27SA | Aluminium clad steel wire 30 SA | Aluminium clad steel wire 40 SA |
|
|---|---|---|---|---|---|---|---|
| A | B | ||||||
| Final modulus of elasticity | GPa | 174 | 162 | 155 | 140 | 132 | 109 |
| Coefficient of linear expansion | K-1 | 11.9 x 10-06 | 13 x 10-06 | 12.6 x 10-06 | 13.4 x 10-06 | 13.8 x 10-06 | 15.5 x 10-06 |
| Temperature coefficient of resistance to constant mass (α) | K-1 | 0.0036 | 0.0036 | 0.0036 | 0.0038 | 0.0040 | |
| Density | Kg/dm3 | 7.29 | 6.59 | 6.53 | 5.91 | 5.61 | 4.64 |
| Resistivity max. | ηΩ.m | 123.15 | 84.8 | 63.86 | 57.47 | 43.10 | |
| Conductivity | % IACS | 14 | 20.3 | 27 | 30 | 40 | |
| Aluminium minimum thickness | % radio | 4.6 | 8 / 10 | 14 | 15 | 25 | |
| Aluminium proportion in cross section | % | 10 | 25 | 37 | 43 | 62 | |
CABLEADOS
Existing normative related with the Product
| Standard | Title |
|---|---|
| ASTM B416 | Standard specification for concentric-lay-stranded Aluminum clad Steel conductors |
EARTH WIRES – ACS 20SA
| No and size of wires | Area | Diameter | Stranding | Breaking load | Max. Resistance at 20ºC | Weight | |
|---|---|---|---|---|---|---|---|
| mm2 | mm | Nº | Ø | daN | Ohm/km | Kg/Km | |
| 3 No. 5AWG | 50.29 | 9.96 | 3 | 4.62 | 5447 | 1.6997 | 334.1 |
| 3 No. 6AWG | 39.80 | 8.86 | 3 | 4.11 | 4575 | 2.1476 | 264.4 |
| 3 No. 7AWG | 31.74 | 7.91 | 3 | 3.67 | 3859 | 2.6935 | 210.8 |
| 3 No. 8AWG | 25.04 | 7.03 | 3 | 3.26 | 3188 | 3.4136 | 166.3 |
| 3 No. 9AWG | 19.95 | 6.27 | 3 | 2.91 | 2540 | 4.2841 | 132.5 |
| 3 No. 10AWG | 15.81 | 5.58 | 3 | 2.59 | 2012 | 5.4081 | 105.0 |
| 0.00 | |||||||
| 7 No. 5AWG | 117.35 | 13.86 | 7 | 4.62 | 12040 | 0.7299 | 781.1 |
| 7 No. 6AWG | 92.87 | 12.33 | 7 | 4.11 | 10113 | 0.9222 | 618.1 |
| 7 No. 7AWG | 74.05 | 11.01 | 7 | 3.67 | 8530 | 1.1566 | 492.9 |
| 7 No. 8AWG | 58.43 | 9.78 | 7 | 3.26 | 7046 | 1.4659 | 388.9 |
| 7 No. 9AWG | 46.56 | 8.73 | 7 | 2.91 | 5615 | 1.8397 | 309.9 |
| 7 No. 10AWG | 36.88 | 7.77 | 7 | 2.59 | 4448 | 2.3224 | 245.5 |
| 7 No. 11AWG | 29.08 | 6.9 | 7 | 2.3 | 3507 | 2.9449 | 193.6 |
| 7 No. 12AWG | 23.10 | 6.15 | 7 | 2.05 | 2786 | 3.7070 | 153.8 |
| 0.00 | |||||||
| 19 No. 5AWG | 318.51 | 23.1 | 19 | 4.62 | 32680 | 0.2700 | 2128 |
| 19 No. 6AWG | 252.07 | 20.55 | 19 | 4.11 | 27451 | 0.3411 | 1684 |
| 19 No. 7AWG | 200.99 | 18.35 | 19 | 3.67 | 23154 | 0.4278 | 1343 |
| 19 No. 8AWG | 158.59 | 16.3 | 19 | 3.26 | 19126 | 0.5422 | 1060 |
| 19 No. 9AWG | 126.37 | 14.55 | 19 | 2.91 | 15240 | 0.6805 | 844 |
| 19 No. 10AWG | 100.10 | 12.95 | 19 | 2.59 | 12072 | 0.8590 | 669 |
