Title: Short-circuit tests on current-limiting fuses: modelling of the test circuit
Abstract: In the standard procedures for high-power short-circuit testing of current-limiting fuses, the test circuit is conventionally characterised by the RMS test voltage, prospective current, frequency, closing angle, and power factor. From these parameters a constant RL equivalent circuit can be derived, which has been widely used in the modelling of fuse-breaking transients, but recent studies have shown that this circuit model is inadequate. The frequency dependence of R and L has been investigated by fast-Fourier-transform analysis of fuse-breaking test transients obtained in a high-power short-circuit test laboratory, and the results show that, while L decreases slightly, R increases greatly with frequency. The nominal-power-factor value provides only a measure of the DC resistance of the circuit. The frequency dependence of R must be taken into account for accurate modelling of the operation of current-limiting fuses.
Publication Year: 1993
Publication Date: 1993-01-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 8
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