Many engineers know to use instruments to measure on load tap changers, but they do not know how to interpret the test waveform when they see it. Understanding the switching principle is the foundation of understanding waveforms. Once this logic is explained clearly, waveform analysis becomes easy.S
Many people use a circuit resistance tester for the first time and see that the instrument has four wiring terminals - I+, I -, U+, U -, and is equipped with two sets of test wires of different thicknesses. They are a bit confused why it is so complicated. Can't two wires work?What problem does
Those who work in substation operation and maintenance know that lightning arresters are the first barrier for lightning protection in power systems. But what many people don't know is that zinc oxide arrester (MOA) will gradually age and become damp during long-term operation, and its protectiv
People who come into contact with a DC resistance tester for the first time often have this question - even if it's just measuring resistance, using two multimeter probes is enough? In fact, a multimeter may have an error of tens or even hundreds of milliohms when measuring small resistors in th
After years of maintenance in the power system, I have found that many people know that transformers need to undergo "oil testing", but they cannot explain exactly what "dielectric strength" is measured. This article thoroughly explains this concept.The essence of dielectric stre
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