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LS Cable & System overhead wire is composed of ACSR and overhead ground wire. They are normally installed on steel towers, and recently the usage of high-capacity conductors for high-capacity transmission among power cables is increasing.

ALL ALUMINUM CONDUCTOR (AAC)

Construction

All Aluminum Conductors (AAC) is a concentric-lay-stranded conductor consisting of hard drawn aluminum wires available in both single layer and multi-layer constructions.

Standard

All Aluminum Conductors (AAC) can be supplied to meet various International Standards and National standard as follows:

  • TCVN 5064:1994, SD 1995
  • BS 215/1
  • IEC61089
  • ASTMB231
  • AS 1531

However, LS VINA Cable & System can also supply a range of alternative designs to meet customer-specified requirements.

BARE HARD-DRAWN COPPER CONDUCTOR

Construction

Bare stranded hard-drawn copper conductor is a concentric-lay-stranded conductor consisting of hard drawn copper wires available in both single layer and multi-layer constructions.

Standard

Bare stranded hard-drawn copper conductor can be supplied to meet various National Standards as follows :

  • TCVN 5064:1994, SD 1995
  • BS 7884
  • DIN 48201/1
  • AS 1746

However, LS VINA Cable & System can also supply a range of alternative designs to meet customer-specified requirements.



ALL ALUMINUM-ALLOY CONDUCTOR (AAAC)

Construction

All Aluminum-Alloy Conductors (AAAC) is a concentric-lay-stranded conductor consisting of aluminum-alloy wires available in both single layer and multi layer constructions.

Standard

All Aluminum-Alloy Conductors [AAAC) can be supplied to meet various International standards and National standard as follows :

  • IEC 61089
  • ASTM B399
  • BS EN 50182
  • AS 1531

However, LS VINA Cable & System can also supply a range of alternative designs to meet customer-specified requirements.

ALUMINUM CONDUCTOR STEEL REINFORGED (ACSR)

Construction

Aluminum Conductors, Steel-Reinforced (ACSR) is a concentric-lay-stranded conductor consisting of galvanized steel central core with one or more layers of hard drawn stranded aluminum wires laid helically over the steel core. Steel core wires are protected from corrosion by galvanization.

Additional corrosion protection is available through the application of grease.

Standard

Aluminum Conductors, Steel-Reinforced (ACSR) can be supplied to meet various International standards and National standard as follows :

  • TCVN 5064:1994, SĐ 1995
  • IEC 61089
  • ASTM B 232
  • DIN 48204
  • BS 215-2
  • AS 3607


Bare Conductor Manufacturer Aluminium The aluminum used to produce these cables is from first fusion, with a minimum of 99.5% aluminum ensuring with this purity a high resistance to corrosion. These cables are suitable in areas with high humidity and in places with high air pollution.

These cables can be supplied greased, using a chemically stable grease and neutral against aluminum The range of bare cables for airlines is divided, depending on their use, in:

Phase Conductors

Ground Cables Bare Conductor AAC Conductor AAAC Conductor ACSR -Conductor AACSR Conductor ACSR / AW 

Conductor TACSR Conductor ACAR Conductor ACSS -Conductor ACSS / TW Conductor ACS Conductor GSW Conductor ACCC Conductor OPGW These are mainly made of Aluminum, Aluminum Alloy and Aluminum

Steel cables, these are replacing hard copper line cables since the last century.

 ALL ALUMINUM CONDUCTOR CABLES (AAC) Bare Conductor Manufacturer Aluminium These cables are formed by several aluminum wires in concentric layers wired in opposite directions. (ACSR)Aluminum-Steel cables arose from the need to reinforce the aluminum cables by increasing the mechanical characteristics of the same, improving the coefficient of thermal expansion and ensuring a longer life of the driver. Since that time these drivers are the most universally employed in airlines. ACSR cables (Aluminum Conductor Steel Reinforced) are formed by wires of high purity hard temper aluminum, placed in concentric layers over a wire core or galvanized steel wire.

COMPACTED ALUMINUM WIRE REINFORCED with steel core (AWG-MCM) This cable is a classic seven-wire formed by Circular section Aluminum-Steel, in which manufacturing process is given him a sectoral shape to the wires of the outer layer.

Eliminating the existing gaps. Its main job is in medium and low voltage lines providing the following advantages:

-Decrease in total diameter for the same effective section with consequent advantages in terms of wind action, ice sleeves, protection against humidity, etc.

- Advantage to the connection, due to a larger contact surface Aluminum coated steel (Alumoweld type) is a bimetallic product with a pure aluminum coating on a high strength steel core, metallurgically bonded.

The use of this type of wire is came of the conductivity that is higher than the galvanized steel and guarantees a corrosion resistance similar to the aluminum wire, so they can be used more safely than the ACSR in zones of industrial and maritime environments.

ALL ALUMINUM ALLOY CONDUCTOR / ALMELEC (AAAC) Almelec is an aluminum alloy (Magnesium and Silicon) used in conductors for power lines. The advantage of these cables against ACSR are: - Cheaper infrastructure due to:

  • Longer runs (less supports required) due to lower weight and high breaking load (arrow is less)
  • Better reuse of waste because it is a homogeneous cable - Easy installation
  • Greater surface hardness than aluminum (less shock sensitive)
  • Better tensile strength
  • Less weight, better handling of reels

Easy attachment of cable ends Almelec greased cables, both inside and outside, goes really well in installations near the sea and in areas with high pollution.

Sometimes white, sometimes red, crescent-shaped, oval or perfectly round, the Moon has been the faithful companion of the Earth for billions of years.

Born at the same time as the Earth, the Night Lady has aged prematurely but her gaze has kept its intensity and still makes many dreamers dream who woo her when she deigns to appear above the horizon.


The Moon is not a planet because it does not revolve around the Sun; the moon revolves around the Earth. It is therefore the natural satellite of the Earth. But there are also so-called artificial satellites that revolve around the Earth and are used for telecommunications or to study our planet.

The Moon orbits very far from the Earth, at about 384000 km distance while most artificial satellites revolve around the Earth at about 500 km altitude, some at 36000 km like geostationary satellites.

The Moon is so far that it takes 4 days to reach it by rocket. We'll talk about it in the page dedicated to the exploration of the Moon.

The Moon always has the same apparent diameter, even near the horizon where it looks much bigger. It is actually an optical illusion as seen in the photograph shown on the left: near the horizon or very high in the sky the Moon always has the same diameter!

Four times smaller and 81 times lighter than Earth, the Moon is 3476 km in diameter. It is one of the largest satellites in the solar system, as large as the Jupiter-based Europe satellite, which you can observe as a bright star in a small telescope.

It represents 3/4 of the planet Mercury which is the closest planet to the Sun.

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 In 1900, during a dive, sponge fishermen discovered a copper machine near Antikythera dating back to the 1st century BC. It seemed to appeal to a technology that we thought hitherto unknown to the ancient Greeks.

Indeed, this machine, although fragmented and corroded, was analyzed by X-ray and then reconstructed piece by piece and revealed an astonishing mechanism.

As can be seen on the right, this machine contains segments of circles, a piece of graduated spiral, numerous inscriptions, marks, symbols and more astonishing still 33 copper gears including a differential whose gear wheel is provided with a pin sliding in a slot.

Knowing that the ancient Greeks were excellent mathematicians and worshiped the moon, the number of teeth on certain wheels (19, 33, 53, 127, 222 or 223, etc.) immediately makes one think of either the prime numbers or lunar cycles or submultiples as they were known to the Greeks two thousand years ago.

More surprisingly, the deciphering of the inscriptions revealed that the word cogwheel was clearly inscribed. Elsewhere, one could read the color is black, the color is red-fire, the list of Greek months, symbols like S for Selene and H for Helios, a dial divided into four parts referring to the four games Panhéléniques (the games of Nemea, Delphi, Corinth and Olympia) and finally the number 223 is registered.

For an archaeo- astronomer this number is not trivial. Already among the Mesopotamians, 223 corresponded to the number of lunar cycles or lunations at the end of which eclipses reproduce in the same configurations, it is the famous cycle of Saros.