Estimation of dielectric loss using damped AC voltages

In this article some fundamental aspects of dielectric loss estimation using DAC voltage are described. Damped ac voltage testing is an alternative method of continuous ac voltage testing. It provides a method of assessing the condition of the insulation of capacitive test objects, e.g., power cables or stator windings of generators. The decay of damped ac voltages used for on-site energizing of power cables, and testing generator stator insulation, can be analyzed to estimate the dielectric loss (tan δ) of the insulation.