Many beginners find this question strange - the oil cup looks clean, why can't it be used directly? The instruction manual clearly states that "new oil cups or newly cleaned oil cups should be punctured 24 times before testing", and there are sufficient technical reasons behind it, not
The measurement of moisture in insulating oil may sound like a simple detection item, but in practical operation, there are many details that are easily overlooked - if not careful, the moisture in the environment can mix in, resulting in high accuracy and making incorrect judgments, which can actua
I have seen many beginners using a DC high voltage generator for the first time, and the most common mistake they make is the wrong operating sequence - either close the high voltage switch without resetting the knob, or turn off the main power directly after the experiment and forget to turn off th
The wiring for the variable ratio test looks simple, with only a few test clips, but it wasn't until we arrived on site that we discovered many details about which one to connect, whether to connect the neutral point, and the difference between single-phase and three-phase. Clarifying these ques
Recently, while assisting a friend in reviewing his equipment procurement list, I discovered that the rated voltage of the ultra-low frequency high-voltage generator he selected was sufficient, but its load capacity did not match the tested cable, resulting in the inability to generate a normal wave