tan delta testing, what is
Tan Delta is also known as the 'loss angle' or 'dissipation factor'. It is used to test the level of degradation in insulation materials of electrical machines and power cables. Tan Delta, also called Loss Angle or Dissipation Factor testing, is a diagnostic method of testing electrical equipment to determine the integrity of the insulation. This is done to try to predict the remaining life expectancy of the equipment.