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I am text block. Click edit button to change this text. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. The screen test is a collection of physical, electrical, and chemical tests for transformer oil. Typically, a 1 liter sample of oil is collected. No single test alone will indicate the true condition of the liquid, so it is suggested all be performed. The group of tests include:

• Dielectric Breakdown: A physical test that measures the breakdown voltage of an insulation liquid and indicates the presence of contaminating agents.
• Interfacial Tension: This test of electrical insulating fluids is an indicator of the presence of polar compounds.
• Color: Oil color indicates aging and presence of contaminants.
• Acidity: As acid values increase (usually due to oxidation of the oil) the insulating quality of the oil decreases.
• Power Factor (dissipation factor): This test measures the dielectric losses in the liquid, hence the amount of energy dissipated as heat