Abstract
Serious overvoltages may be generated by current suppression (or current chopping) when switching out shunt reactors or unloaded transformers. Normalized overvoltage profiles are determined using (a) a single concentrated resistor and (b) a distributed resistance network to simulate eddy current loss in the magnetic core. These characteristics show that large errors may be present with the single resistor model if there is significant damping. Results are then given for a modified computer model including the effect of hysteresis and multiple current chopping and restriking.
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