Electrical AC/DC conversion arrangement

An electrical AC/DC conversion arrangement comprising:

• an AC circuit breaker, which is configured as a hybrid circuit breaker or as a semiconductor circuit breaker;
• a rectifier;
• at least one smoothing capacitor;
• a first semiconductor switch connected in series with the at least one smoothing capacitor;
• and
• at least one first isolation relay for galvanic isolation,
• wherein one input of the AC circuit breaker forms an AC input of the electrical AC/DC conversion arrangement,
• wherein one output of the AC circuit breaker is connected, at least indirectly, with an input of the rectifier,
• wherein the at least one smoothing capacitor and the first semiconductor switch connect a first output of the rectifier with a second output of the rectifier,
• wherein the first output of the rectifier is connected, at least indirectly, with one input of the first isolation relay,
• wherein one output of the first isolation relay forms a first DC output of the electrical AC/DC conversion arrangement and is provided for connection to at least one direct current consumer,
• wherein the AC circuit breaker, the first semiconductor switch, and the first isolation relay are interconnected, at least indirectly,
• wherein the electrical AC/DC conversion arrangement comprises at least one control and monitoring unit,
• wherein the control and monitoring unit is connected, at least indirectly, with the AC circuit breaker, the first semiconductor switch, and the first isolation relay
• wherein the control and monitoring unit is connected in terms of control technology with the second isolation relay, and
• wherein the control and monitoring unit is configured such that, upon detection of a present overcurrent by the second current sensor, to switch off the first semiconductor switch as well as the AC circuit breaker in a first step, and subsequently, to send in a second step a switch-off pulse to the second isolation relay after the expiration of a preset time period, and to switch the first semiconductor switch and the AC circuit breaker on again in a third step after the opening of the second isolation relay.