Question

Consider the following statements regarding aluminium conductor steel reinforced conductors in transmission lines.

State whether these statements are true or false.

(a) It is cheaper than copper conductors of equal resistance.

(b) Corona losses are reduced in it because of the larger diameter of the conductor.

(c) It has lesser mechanical strength, so it needs more support for a particular length of transmission line.

1. (a) False, (b) True, (c) False
2. (a) False, (b) True, (c) True
3. (a) True, (b) True, (c) False
4. (a) True, (b) True, (c) True

Answer 1

Correct Answer - Option 3 : (a) True, (b) True, (c) False

• Aluminum is light in weight and is having good conductivity. But it is having very low tensile strength.
• To make it suitable to be used as a conductor for the transmission line, we need to increase its tensile strength.
• To increase the tensile strength, steel is used as the core of the conductor.
• A good example of steel core aluminum is an ACSR (Aluminium Conductor Steel Reinforced) conductor.
• ACSR has high tensile strength, good conductivity, and economical.
• ACSR conductor widely used in transmission lines and as an inner conductor of coaxial cable.
• In ACSR conductors, there is no requirement of insulation between aluminum and steel conductors.
• Corona losses are reduced in it because of the larger diameter of the conductor.