Grading of the cables is performed in
order to achieve
(i) Uniform stress
(ii) Reduction in quantity of
insulation
(iii) Reduction in quality of
insulation
(i), (ii)
(i)
(i), (iii)
(i), (ii), (iii)
(i), (ii)
Grading is performed to reduce the stress at one cable and to make it uniform throughout. Also it reduces the insulating material to be used and thus the cost saving.
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