railway RRB JE (CBT I + CBT II) Mock Test 2024 Power Systems Transmission and Distribution Underground Cables
Solid-type cables are considered unreliable beyond 66 kV because
1
of the corona loss between conductor and sheath material
2
skin effect dominates the conductor
3
there is a danger of breakdown of insulation due to the presence of voids
4
insulation may melt due to higher temperature