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After stepping down and powering off, novice Xiaohan took care when he touched the test object with a grounded discharge wand, and he heard the sound of the discharge. Xiaoqing Li’s “overkill†and escaped. After being scared, Xiao Li called for telephone consultation. Engineers emphasized that: Before using a test transformer with DC output function (such as YD (JZ) or YDC (JZ) type) for AC withstand voltage test, be sure to confirm that the silicon stack is shorted by the shorting rod so as not to accidentally lift the DC high voltage. After the power was cut off, the electric shock caused by the ground discharge was not done.
If a sound is heard in the high voltage bushing during the boost test, it should be alerted. This is because the shorting rod is not screwed into place (ie, the silicon stack is not shorted). The test object is charged with a DC voltage and should be depressurized and de-energized. Afterwards, use the grounded discharge rod to fully release the charge that may remain on the capacitive test specimen to avoid electric shock accidents. The resistance of the multimeter can be measured in advance to measure the resistance between the high voltage head A and the high voltage tail X (generally several thousand ohms to tens of kiloohms, with no difference between forward and reverse directions). To confirm that the high voltage silicon stack is reliably shorted.
Dear Customer:
Thank you for your attention to our products. In addition to this product introduction, our company also introduces the vacuum tester, infrared thermometer, dielectric loss tester, high voltage test transformer, vacuum oil filter, high current generator, etc. If you are interested in our products, welcome to inquire. Thank you!
Talk about using AC and DC test transformer precautions
Talk about the use of AC and DC test transformer Note This morning, a customer calls to ask: "Test Transformer after the completion of AC withstand voltage test and then touch the test object with a grounding discharge rod, you can hear the sound of" 啪 "discharge. Why?†In the course of communicating with this customer, Ms. Li, the engineer learned that the other party's tester had done a DC voltage withstand test before inserting the shorting bar of the silicon stack and did not tighten it in place (ie, the silicon stack was not short After that, Xiao Li did not check the voltage withstand voltage (a few kilovolts) before conducting AC voltage withstand tests.