Standard Test Method for DIELECTRIC BREAKDOWN VOLTAGE OF INSULATING OILS OF PETROLEUM ORIGIN USING VDE ELECTRODES
|Publication Date:||30 July 1982|
1.1 This test method covers the determination of the dielectric breakdown voltage of insulating oils of petroleum origin. This test method is applicable to liquid petroleum oils commonly used in cables, transformers, oil circuit breakers, and similar apparatus as an insulating and cooling medium. The suitability of this test method for testing oils having viscosity of more than 19 cSt, (100 SUS) at 40°C (104°F) has not been determined. Refer to Terminology D 2864 for definitions used in this test method.
1.2 This test method is more sensitive to the deleterious effects of moisture in solution than is Test Method D 877, especially when cellulosic fibers are present in the oil. It has been found to be especially useful in diagnostic and laboratory investigations of the dielectric breakdown strength of oil in insulating systems.
1.3 This test method should be used for the testing of oil in power system equipment where the oil has been filtered and vacuum filled.
1.4 Both the metric and the alternative inch-pound units are acceptable.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.