Dielectric Phase Angle

The angular difference in phase between the sinusoidal alternating potential difference applied to a dielectric and the component of the resulting alternating current having the same period as the potential difference. Es­sentially, this means that when an alternating current is applied across an insulating material, the resulting alternating current passing through it (no matter how small) will be at a different phase than the voltage. The dielectric phase angle is the difference in the timing of the peak of the alternating input voltage across the dielectric and the peak of the resulting alternating current through it.