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Experimental graphs of voltages and currents recorded for U = 100 V, time t = 500 ms and capacitance C = 5 ÷ 75 nF. The earth fault event results in a steady-state voltage with a maximum value of approximately √2 100 V during the fault. Due to the saturation of the transformer cores, rapidly damped currents with peak values of up to about 50 A flow in the primary windings of the voltage transformers. The value of capacitance practically does not affect the values and shapes of voltages and currents during a fault, but outside of some range the ferroresonance is not sustained.

See also: https://www.e-magnetica.pl/doku.php/file/tarko_et_al_ferrroesonance_damped_png

The images were copied from (and slightly modified):
  * Tarko, R.; Nowak, W.; Gajdzica, J.; Czapp, S. Analysis of Ferroresonance Mitigation Effectiveness in Auxiliary Power Systems of High-Voltage Substations. Energies 2024, 17, 2423. https://doi.org/10.3390/en17102423 

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  tarko_et_al_ferroresonance_examples.png
You are permitted to use this image freely, for any legal purpose including commercial (the permission is given, so there is no need to ask for it explicitly again), but you must always include the following credits:

**R. Tarko, W. Nowak, J. Gajdzica, S. Czapp, MDPI, [[https://creativecommons.org/licenses/by-sa/4.0/|CC-BY-SA-4.0]]** 
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{{tag> Ferroresonance Damping Oscillations Overvoltages Overcurrents Files}}