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Electrical Properties of Plastics

Dissipation Factor

Dissipation Factor is the ratio of the real power (in phase power) to the reactive power (power 90 deg out of phase). It is also defined as the ratio of conductance of a capacitor in which the material is the dielectric to its susceptance or the ratio of its parallel reactance to its parallel resistance. It is the tangent of the loss angle and the cotangent of the phase angle. Dissipation factor is a measure of the conversion of reactive power to real power, showing as heat. ASTM D-150.5.