Differentiate between overhead transmission and underground transmission.
Points
|
Overhead line
|
Underground cable
|
Capital cost
|
Less
|
More
|
Erecting cost
|
Less
|
More
|
Time require for completion of work
|
Less
|
More
|
Flexibility
|
More flexibility
|
No flexibility
|
Future expansion in voltage level
|
System voltage can be increased easily
|
System voltage cannot be increased
|
Overload capacity |
More
|
Less
|
Fault finding
|
Easy
|
Difficult
|
Charging Current
|
Less
|
More
|
Chances of fault
|
More
|
Less
|
Chances of accident
|
More
|
No chances of accident
|
Safety
|
Less
|
More
|
Radio interference
|
Produces radio interferences
|
Not produces radio interferences
|
Short cute route
|
Difficult
|
Possible
|
Theft Of energy
|
More possibility
|
Less possibility
|
Voltage drop
|
More
|
Less
|
Power factor
|
Less
|
More
|
Reliability
|
Less
|
More
|
Life
|
Less
|
More
|
Space consumed
|
Space consumed
|
No space consumed
|
Appearance
|
Not good
|
Very good
|