The rapid and precise prediction of short circuit current zero crossings is crucial for the operation of phase controlled switching.This study uses the extended Kalman filter technique to forecast zero crossings of short circuit current.It examines the impact of varying sampling durations and initial phase angles on zero crossing prediction errors

based on the characteristics of short circuit current waveforms.Simulation and experimental findings indicate that with a sampling window of around 5 ms

the prediction accuracy for the initial zero crossing can attain 0.5 ms.This method demonstrates superior prediction accuracy and shorter sampling time compared to current methods

offering both theoretical and technical support for swift short circuit fault interruption and minimizing circuit breaker arcing time.