Question

state and prove kelvin's law for determining economic size of conductor for over head lines and discss it's limitations​

Answer 1

Answer:

Limitations Of Kelvin's Law

Although Kelvin's law holds good theoretically, there is often considerable difficulty while applying it in practice. The limitations of this law are:

It is quite difficult to estimate the energy loss in the line without actual load curves which are not available at the time of estimation.

Interest and depreciation on the capital cost cannot be determined accurately.

The conductor size determined using this law may not always be practicable one because it may not have sufficient mechanical strength.

This law does not take into account several factors like safe current carrying capacity, corona loss etc.

The economical size of a conductor may cause the voltage drop beyond the acceptable limits.

Explanation: