| 摘要 |
A fault detector processes half cycles of current in variable frequency ac power systems by weighting half cycle magnitude values by the period of t he half cycle. Time attenuated accumulations of the weighted half cycle peak values exceeding a first threshold for short delay protection, and of weighted positive differences between the peak values of successive half cycles and the preceding half cycles for a selected period of time after a peak value exceeds a second threshold for arc faults, generate trip signals when they reach specified levels.
|
