The breakdown voltage of insulating oil is a measure of its ability to withstand voltage inside electrical equipment without being damaged, and is one of the main means to test the performance of transformer oil. The precautions for measuring the breakdown voltage of insulating oil include:
1. The structural type of the electrode affects it. Choose which electrode according to the test method. The results of the three electrode measurements are different. The spherical electrode has the highest measurement result, followed by the hemispherical electrode; The flat electrode is the lowest.
2. The distance between electrodes is 2.5mm ± 0.1mm and needs to be calibrated with a block gauge. If the electrode distance is too small, it is easy to breakdown and the measurement result is too low. On the contrary, the measurement results are on the high side. (3) The sample should be representative, and the presence of moisture and other impurities in the oil has a significant impact on the breakdown voltage. So the sample must be shaken evenly and then injected into an oil cup.
3. The sample should be representative, and the presence of moisture and other impurities in the oil has a significant impact on the breakdown voltage. So the sample must be shaken evenly and then injected into an oil cup.
4. The experimental data has a high degree of dispersion, which is due to the multiple influencing factors that cause the breakdown process. Therefore, the test method specifies taking the average of 6 times as the test result.
5. In the experiment, it was found that the breakdown voltage value increased with the increase of breakdown discharge times. This is caused by the mixing of impurities with different properties in the oil. If the main impurities and moisture mixed in the oil are fiber impurities, the moisture is evaporated during the breakdown process, so the experimental data becomes higher and higher. But there are also reductions that need to be considered, such as whether the ambient humidity exceeds the regulations.
ZC-210B fully automatic insulation oil dielectric strength tester is a high-precision and fully digital industrial instrument developed by all our company's scientific research and technical personnel, in accordance with the relevant provisions of the national standard GB/T 507-1986 and industry standards DL/T 474.4-2006 and DL/T 596-1996, leveraging our own advantages. After multiple on-site tests and long-term unremitting efforts, we have meticulously developed it. To meet the needs of different users, this series of instruments can be divided into single cup three cup and multi cup models. The instrument is easy to operate and has a beautiful and elegant appearance. Due to the use of fully automatic digital microcomputer control, the measurement accuracy is high, the anti-interference ability is strong, and it is safe and reliable.
Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase.
