Modelling of a RL circuit subjected to a high voltage transient and investigating the importance of inductors in surge protection (2018)
A surge protector device (SPD) basically functions as a filter to remove transients from being transferred to the load device, and each component inside the protector has a specific role towards the goal achievement. A key component found in many SPDs is inductors. In the patented and commercialized SCASA technique developed by the University of Waikato, a coupled-inductor approach is implemented. This paper mainly focuses on developing a mathematical model for the energy stored in an inductor and the energy dissipated in a resistor during a transient event. The alteration of the ratio between two respective energies is also studied for several resistances and inductances. Considering the practical requirements, the ideal range for the inductance is decided with minimized impedance effects on the domestic AC mains. Under such low impedance conditions, the importance of inductors in surge protection is verified, and using the developed model it can be proven how approximately 50-60% of the surge energy is absorbed by them. This fundamental characteristic of inductors is widely applied in surge protectors.
CitationSilva S (2018). Modelling of a RL circuit subjected to a high voltage transient and investigating the importance of inductors in surge protection. University of Waikato, WYRES, 01/11/2018.
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KeywordsRL circuit, SPDs; Transients; Inductors; SCASA; Impedance
ANZSRC Fields of Research40 - Engineering::4008 - Electrical engineering
RightsAll rights reserved unless otherwise stated
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