- Corona results in loss of power due to the discharge along the surface of the conductors.
- Corona results in damage to the conductor surface over a period of time.
- Corona results in the production of ozone in the atmosphere.
- This leads to cracking of elastomeric components like O-rings, gaskets, etc due to the chemical action of ozone.
- Insulation of Electric Equipments can be damaged.
- The audible noise from the power lines may be annoying.
While Corona has many disadvantages, it also has an advantage.
- Since the corona dissipates energy, the magnitude of steep surges caused by lightning or surges is mitigated as they pass through the lines.