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LABORATORYTesting LaboratoryPhysical, Chemical and Electrical Tests

Power Factor

Power Factor (PF)Test (%)  

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PF is the cosine of the phase angle between sinusoidal voltage applied to the oil and total current. The aim is to test the insulating properties of the oil between two metal plates which are intertwined and electrically isolated from one another.

A high value indicates oil contamination and the presence of oxidation products. This test also provide us to learn about oil insulation resistance.