Difference between Underground and Overhead System

Nov 30 -0001

Distinguish, differentiate, compare and explain what is the difference between Underground and Overhead System for transport. Comparison and Differences.

Differences between Underground and Overhead System

S.No.	Underground System	Overhead System
1	Faults occur frequently.	Very rare chances of faults.
2	It is less safe.	It is more safe.
3	It is less expensive.	It is more expensive.
4	It gives shabby look.	Its appearance is good as wires are not visible.
5	Can be easily repaired.	Cannot be easily repaired.
6	Fault point can be easily located.	Fault point cannot be easily located.
7	It can work upto 400 kV.	It can work only upto 66 kV due to insulation difficulty.
8	It is more flexible as new conductors can be laid along the existing conductors.	It is not flexible, as new Flexibility conductors are to be laid in new channels.