What are the material used for overhead line in transmission system?

Overhead power lines commonly use conductors in which the basic material is drawn with hard aluminium or its alloys containing magnesium and silicon. However, due to the insufficient durability of aluminium, non-ductile, bare, steel-aluminium conductors marked as AFL are used.

What are the wires used in transmission lines?

There are three types of cables used in wired transmission namely twisted pair cables, coaxial cables and fiber optic cables. Twisted pair cables are used for transmitting data in small areas. These cables are further divided into two types. Shielded Twisted Pair (STP) and Unshielded Twisted Pair (UTP).

Which metal is used for overhead electrical cables?

aluminium
Copper and aluminium are most frequently used as the electrical conductors in electrical cables due to their low resistance and excellent conductivity. These metals are both ductile and relatively resistant to corrosion, but they also have different properties which make them useful for various applications.

What is the most common material used in conductor?

Copper
Copper is by far the most widely used conductor material.

What is an overhead line conductor?

Conductor is a physical medium to carry electrical energy form one place to other. It is an important component of overhead and underground electrical transmission and distribution systems. It has maximum electrical conductivity. It has high tensile strength so that it can withstand mechanical stresses.

What type of conductor materials we use?

Conductors:

• silver.
• copper.
• gold.
• aluminum.
• iron.
• steel.
• brass.
• bronze.

Why ACSR conductor is used for overhead lines?

Aluminium conductor steel-reinforced cable (ACSR) is a type of high-capacity, high-strength stranded conductor typically used in overhead power lines. The outer strands are high-purity aluminium, chosen for its good conductivity, low weight, low cost, resistance to corrosion and decent mechanical stress resistance.

Is aluminium used in transmission lines?

Aluminum provides a better conductivity to weight ratio than copper, and therefore is also used for wiring power grids, including overhead power transmission lines and local power distribution lines, as well as for power wiring of some airplanes. It has cost and weight advantages over copper wires.

Why is copper and aluminium used for transmission?

Copper and aluminium are good conductors of electricity. They have very low resistance and allow the current to flow through them easily. Hence, they are used to make wires for electrical transmissions.

How many types of conductors are used for overhead lines?

Following are four common types of overhead conductors used for overhead transmission and distribution to carry generated power from generating stations to the end users. Generally, all types of conductors are in stranded form in order to increase the flexibility.