IEC 60076-3 - Insulation Testing

IEC 60076-3 Explained: Dielectric Tests and Clearances

IEC 60076-3 is the IEC standard that sets the insulation levels, dielectric tests, and minimum external air clearances for power transformers. It defines eleven dielectric tests, assigns each one as routine, type, or special based on the highest voltage for equipment (Um), and gives the test voltage tables. The current form is IEC 60076-3:2013 as amended by A1:2018.… Read More: IEC 60076-3 Explained: Dielectric Tests and Clearances »

Lightning Impulse Testing for Power Transformers: Why It Works and What It Catches

A lightning strike on a transmission line lasts microseconds. A power transformer is designed to run for forty years. The lightning impulse test is the bridge between those two facts — it proves, in the factory, that the transformer can survive the microsecond event so it can deliver the four decades of service. The test applies a standardized… Read More: Lightning Impulse Testing for Power Transformers: Why It Works and… »