FIELD: physics.
SUBSTANCE: in accordance with the method, the arc-fault sampling is performed during a plurality of arc-fault sampling periods, and the arc-fault sampling periods occurring at regular intervals and each arc-fault sampling period lasting a fixed duration, that is shorter than the time in between consecutive arc-fault sampling periods. Monitoring for an occurrence of a predefined event in the circuit breaker device, the predefined event being timed to occur coincident with one of the plurality of arc-fault sampling periods. Performing the grounded-neutral fault sampling near the occurrence of the predefined event, that the grounded-neutral fault sampling is performed between said one of the plurality of arc-fault sampling periods and an immediately adjacent arc-fault sampling period. Wherein the arc-fault sampling, ground-fault sampling, and the grounded-neutral fault sampling are performed during a common detection interval.
EFFECT: invention relates to protect against ground faults and arc-faults.
20 cl, 4 dwg
