I. Overview

Insulation Oil Dissipation Factor and Resistivity Measuring System DTL, is designed and manufactured based on GB/T5654-2007 of《Liquid insulating material of relative permittivity, dielectric loss factor and DC resistivity measurements》. It is used for measuring dielectric dissipation factor and DC resistivity of insulating oil and other insulating liquids. The instrument is characterized by integrated structure, and integrates test cell, temperature controller, temperature sensor, dielectric loss test bridge, AC test power, standard capacitor, high resistance meter, DC high voltage source and other major components. The instrument adopts full digital technology and all of the intelligent automatic measurement, is equipped with large colcor screen (800*480) LCD display, which each step has prompted the Chinese, the test results can be automatically stored and printed output, so that the operator without professional training will be able to use it proficiently.

The specific method is as follows:

1.If the transformer oil contains a lot of impurities, it must be filtered using oil filter paper, and then poured into the oil cup for testing.

2.After each sample is completed, add 20 ml of petroleum ether to the oil cup, drain off the petroleum ether, add another 20 ml of petroleum ether, and then discharge the petroleum ether again. After this, perform an empty cup calibration experiment. The temperature needs to be set to 90 °C until the empty cup calibration test is completed. The empty cup value should not be saved, and the residual petroleum ether should be allowed to evaporate. For specific operations, please refer to the operation video of transformer oil dielectric loss tester.

3.After every 20 oil samples, the oil cup needs to be disassembled, and any remaining impurities in the oil cup should be wiped out with absolute ethanol. For specific operations, please refer to the operation video of transformer oil dielectric loss tester.