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Estimating the influence of current limiting coil’s properties on transient recovery voltages at contacts of a high-tension switch in case of fault currents’ cut-off
Engineering Education # 07, July 2013
DOI: 10.7463/0713.0593546
One way to reduce fault currents in a high-voltage power network is application of current limiting coils. However, mounting of current limiting coils influences transient processes in case of short circuits. Rates of transient recovery voltage development at the contacts of a switch in case of commutation in circuits with current limiting coils exceed permissible values. In order to break a circuit successfully, it is required that the rate of recovery voltage in a switch circuit should not exceed the limiting normalized values permissible for the specified switch type. This paper considers the influence of current limiting coils’ properties, such as inductivity and natural resonance frequency, on transient recovery voltages.
 
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