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Partial Discharge could appear in any point of the insulation system as electrical stress, by exceeding the dielectric strength.
Electrical discharges (ED) in MV power circuits are (1) Partial Discharges (PD) and (2) Partial Arcing (PA). Partial Arcing is a term coined by Martec to explain multiple findings which exhibit some common characteristics of PD.
Electrical engineers should carefully consider the best practice to ensure the reliability of the plant and safety of the personnel during and after the lockdown period.