День: 29.12.2025

Did I Account for the Tap Changer? The First Question in Every Ratio Mystery

You’ve run the test. The screen flashes a ratio deviation of 2.3%—far beyond the acceptable ±0.5%. Your mind races: Is this a shorted turn? A serious winding fault? Before you call for a costly internal inspection, stop. In over two decades of transformer diagnostics, I’ve learned that the first and most critical question is the […]