04,28,2026 78 views
Dielectric strength measurement of insulating oilfixedceremonyWidely used in high-voltage electrical equipment such as transformers, oil circuit breakers, oil filled cables, power capacitors, and oil bushings. During operation, the performance of insulating oil will gradually deteriorate due to the effects of oxygen, high temperature, high humidity, sunlight, strong electric fields, and impurities, resulting in its inability to fully exert its insulating function. Therefore, it is necessary to regularly conduct relevant tests on the insulating oil to identify whether its performance has deteriorated. The quality of insulating oil is closely related to its breakdown voltage.
The breakdown voltage is the ability to measure the withstand voltage of a medium without being damaged, and is one of the main indicators for testing the performance of transformer oil. Dry and clean oil has a relatively high breakdown voltage value.The main factors affecting the breakdown voltage of transformer oil include moisture, impurities, temperature, etc. The relationship between temperature and breakdown voltage is complex. Dry and impurity free oil relies on the non ionization of neutral particles in the oil to maintain its breakdown voltage. However, when the oil contains free water, dissolved water, or solid pollutants, these impurities have higher conductivity and dielectric constant than the oil itself. Under the action of an electric field, they will form a conductive bridge and reduce the breakdown voltage of the oil. It should be said that this test can determine whether there is moisture, impurities, and conductive particles in the oil, but it cannot determine whether the oil contains acidic substances or sludge. Before adding transformer oil through vacuum filtration and degassing, its breakdown voltage can reach 70KV.
insulating oildielectric strengthMeasuring instrumentThere are two types of XUJI672 insulation oil dielectric strength tester and XUJI572 insulation oil dielectric strength tester，All based on GB/T507、Design and development of DL/T429.9, testingfixedThe method is to place the oil test inspecificallyWithin the device, it is subjected to an alternating electric field that uniformly boosts voltage at a certain speed until the oil is broken down. canextensiveApplied to electricitypetroleumChemical and other industries.
Adopting dual CPU microcomputer control; A series of operations such as boosting, zeroing, stirring, cup changing, display, calculation, printing, etc. are automatically completed; Equipped with overvoltage, overcurrent, and automatic zero return protection devices to ensure safety and reliability; Adopting an automatic sine wave generation device and a stepless voltage regulation method to increase the pressure, making the test voltage more stable and reliable;2KV/Sand3KV/STwo different pressurization speeds to choose from, with stronger adaptability; Data is automatically stored and can be retrieved and printed at any time; *The combination of dry-type transformers has the advantages of small size, light weight, and easy use,The number of experimental cups can be1-3 cups.
