Partial Discharge

The Value of Partial Discharge Detection

Measuring the amount of partial discharge that occurs in an electric motor can provide insight into the condition and health of its electrical insulation of windings.

Partial discharge (PD) is defined as a localized, high-frequency arcing that only partially bridges the insulation between multiple conductors or between conductors and the ground wall of an electrical apparatus. It can occur in many system components, such as capacitors, cables, switchgear, transformers, generators, and motors. PD is the result of an electrical breakdown that can occur across the surface or within gas-filled voids in the insulation, causing the ionization of the gas in and

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