Corona Effects

The presence of corona can reduce the reliability of a system by degrading insulation.
While corona is a low energy process, over long periods of time, it can substantially
degrade insulators, causing a system to fail due to dielectric breakdown. The effects of
corona are cumulative and permanent, and failure can occur without warning. Corona
causes:

• Light
• Ultraviolet radiation
• Sound (hissing, or cracking as caused by explosive gas expansions)
• Ozone
• Nitric and various other acids
• Salts, sometimes seen as white powder deposits
• Other chemicals, depending on the insulator material
• Mechanical erosion of surfaces by ion bombardment
• Heat (although generally very little, and primarily in the insulator)
• Carbon deposits, thereby creating a path for severe arcing
• It also causes degradation of insulators.

crona is accomplained by blue light & hizzing sound which leads to losses in it