Modern systems often study "low-frequency oscillations" (LFO), which are voltage instabilities caused by interactions between the power grid and modern train power converters. Likely File Contents
This frequency is standard for major European operators like (Germany), ÖBB (Austria), and SBB (Switzerland). low-frequency-16.7z
Technical drawings or data for the 110 kV high-voltage distribution systems that feed these specific railway grids. Regional Usage low-frequency-16.7z