The ratio of the average power loss to the power loss under peak loading. Of a dielectric, the product of dielectric constant and the tangent of its dielectric loss angle; a measure of the heating effect which occurs in dielectrics.

• 平均能量衰减与峰值负荷时能量衰减的比值。对于电介质来说，它是介电常数和介质损耗角的正切的乘积，这是对出现在电介质中的热效应的量度。