Importance

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Abstract

The invention relates to an automatic circuit breaker (2) for protecting a phase (4, 5, 6), having an input terminal (7), an output terminal (8), a current path (12), which electrically conductively connects the input terminal (7) and the output terminal (8), a disconnection apparatus (13), which is arranged in the current path (12) and is configured to interrupt the current path when actuated, a discharge terminal (9), a discharge path (15), which is connected at one end thereof to the current path (12) between the disconnection apparatus (13) and the output terminal (8) and is connected at the other end thereof to the discharge terminal (9), a connection apparatus (16), which is arranged in the discharge path (15) and is configured to connect through the discharge path when actuated, and a monitoring device (14), which is configured to monitor the current in the current path (12) and, when an overcurrent is identified, to actuate the disconnection apparatus (13) and the connection apparatus (16), wherein the monitoring device (14) is configured to carry out permanent current monitoring and short-circuit current monitoring. The invention additionally relates to a circuit breaker arrangement (1) having a plurality of such automatic circuit breakers (2).

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First Claim