Měření propuštěné energie jističem při vypínání zkratu

Abstract

This thesis deals with the issue of electrical processes in low-voltage circuit breakers during multiple shutdown of the circuit. Introductory passages of the work include theoretical analysis of disconnecting, description of circuit breakers and fuses with respect to their limiting capabilities and subsequent use for the selectivity of protected circuits. The focus of this thesis is to measure the level of energy transmitted by the breaker to the protected circuit during the passing of short-circuit current generated by the pulse source. Transmitted energy is evaluated analytically from evaluated waveforms containing instantaneous values of voltage and current at the circuit-breaker contacts during arcing.