When the dielectric loss factor is measured, the voltage has no obvious influence on the dielectric loss factor. However, when the test voltage is increased, the dielectric loss factor will increase significantly due to the dipole transfer of the medium under the action of high voltage, which causes the loss of electric energy. Therefore, the dielectric loss factor increases with the increase of voltage, so when measuring, it should be added to the rated voltage according to the regulations. According to the information, the voltage when measuring the dielectric loss factor must be added to 3kV to 10kV in order to measure the true value, otherwise the error will be large. The dielectric loss factor is also related to the frequency of the applied voltage. Because the change of the dielectric loss tangent is a function of frequency, that is, the dielectric loss angle changes with the change of frequency. Therefore, it is generally specified that the AC voltage of 50Hz is used when measuring the dielectric loss factor. Such regulations also comply with the actual use of electrical equipment. Vacuum Transformer Oil Purifier can improve dielectric loss of insulating oil.

Temperature has a great influence on the measurement result of dielectric loss factor. If the temperature differs by several degrees during the measurement, the results of the parallel test are not consistent. Because the conductance of the medium changes with the temperature. Therefore, when the temperature increases, the conductance of the medium increases, and the leakage current also increases, so the dielectric loss factor also increases. Practice has proved that the higher the temperature, the clearer the difference between good oil and bad oil. For example, there is almost no difference between the various oil samples at 60, but their differences will be obvious at 100C, so the measurement of the oil dielectric loss factor should be carried out at 80-100 degree. Therefore, in the "National Standard Test Method", the test temperature is changed from 70 to 90 degree in the original "Ministry Standard Method". Of course, theoretically, the higher the temperature, the greater the dielectric loss factor, but when the temperature is too high, it can promote the aging of the oil and affect the test results, so the temperature must not be too high indefinitely. Vacuum Transformer Oil Purifier can heat the temperature of oil to max 80 degree. And also user can reset the max temperature to 100 degree.

Because the water has a strong polarity, it is easy to be polarized under the action of an electric field, which increases the electric current of the oil and promotes the oil's dielectric loss factor to increase significantly. At the same time, it is also related to the humidity during measurement. Generally, an increase in humidity will increase the dissolved water of the oil sample (caused by oil absorption) and increase the medium loss factor. Therefore, it should be measured under the specified relative humidity. Transformer Vacuum Oil Purifier can dehydrate and reduce the water content of insulating oil to 3ppm

It is related to the degree of oil purification and the depth of aging. The size of the oil's dielectric loss factor, practice shows, it has nothing to do with the chemical composition of the oil, but it is related to the degree of oil purification. For example, after the oil is refined or regenerated, due to incomplete purification, residual organic acids, metal soaps and other polar substances remain in the oil, which are easily polarized under the action of an electric field and increase the electric current of the oil. The dielectric loss factor of the oil increases. The dielectric loss factor of oil is also related to the depth of oil aging. Because the deeper the aging of the oil, the more organic acids and other aging products contained in the oil. These aging products will increase the oil’s aging under the action of the electric field. The electric conduction current increases the dielectric loss factor value of the oil. Transformer Oil Purifier Machine can change the aging of oil, improve the dielectric loss factor of insulating oil. After purification by Transformer Oil Purifier, the old oil can reach new oil’s standard.