An electrical AC/DC converter arrangement comprising at least the following components: - a rectifier which has two outputs (10, 11) of different polarity, and - at least one smoothing capacitor and a first semiconductor switch connected in series therewith, the smoothing capacitor and the first semiconductor switch connected in series therewith connecting the first output of the rectifier to the second output of the rectifier, - an AC circuit breaker which is designed as a hybrid circuit breaker or as a semiconductor circuit breaker, an input of the AC circuit breaker forming an AC input of the arrangement, and an output of the AC circuit breaker being connected, at least indirectly in terms of circuitry, to an input of the rectifier, characterized in that the electrical AC/DC converter arrangement also comprises at least the following components: - at least one first isolating relay for galvanic isolation, which relay has two inputs and two outputs and two switching paths each having an interrupter contact, the two outputs (10, 11) of the rectifier being connected to the first isolating relay, in that the first output of the rectifier is also connected, at least indirectly in terms of circuitry, to one of the two inputs of the first isolating relay, in that an output of the first isolating relay forms a first DC output of the arrangement and is provided for connecting at least one first DC load, in that the arrangement comprises, as a further component, at least one control and monitoring unit, and in that the control and monitoring unit is connected, at least indirectly in terms of control technology, to the AC circuit breaker, the first semiconductor switch and the first isolating relay, in that the arrangement has, for short-circuit detection, a unit for detecting desaturation of the first semiconductor switch, which unit is designed in particular as part of the control and monitoring unit, or the arrangement has a first current sensor for overcurrent detection, which first current sensor is arranged between the first output of the rectifier and the first isolating relay and is connected to the control and monitoring unit, and in that the control and monitoring unit is designed to switch off the first semiconductor switch and the AC circuit breaker in a first step when a predefinable overcurrent or a short-circuit current is detected, and subsequently, as soon as the current on the DC side is zero, transmit a switch-off pulse to the first isolating relay. - a rectifier which has two outputs (10, 11) of different polarity, and - at least one smoothing capacitor and a first semiconductor switch connected in series therewith, the smoothing capacitor and the first semiconductor switch connected in series therewith connecting the first output of the rectifier to the second output of the rectifier, - an AC circuit breaker which is designed as a hybrid circuit breaker or as a semiconductor circuit breaker, an input of the AC circuit breaker forming an AC input of the arrangement, and an output of the AC circuit breaker being connected, at least indirectly in terms of circuitry, to an input of the rectifier, - at least one first isolating relay for galvanic isolation, which relay has two inputs and two outputs and two switching paths each having an interrupter contact, the two outputs (10, 11) of the rectifier being connected to the first isolating relay, in that the first output of the rectifier is also connected, at least indirectly in terms of circuitry, to one of the two inputs of the first isolating relay, in that an output of the first isolating relay forms a first DC output of the arrangement and is provided for connecting at least one first DC load, in that the arrangement comprises, as a further component, at least one control and monitoring unit, and in that the control and monitoring unit is connected, at least indirectly in terms of control technology, to the AC circuit breaker, the first semiconductor switch and the first isolating relay, in that the arrangement has, for short-circuit detection, a unit for detecting desaturation of the first semiconductor switch, which unit is designed in particular as part of the control and monitoring unit, or the arrangement has a first current sensor for overcurrent detection, which first current sensor is arranged between the first output of the rectifier and the first isolating relay and is connected to the control and monitoring unit, and in that the control and monitoring unit is designed to switch off the first semiconductor switch and the AC circuit breaker in a first step when a predefinable overcurrent or a short-circuit current is detected, and subsequently, as soon as the current on the DC side is zero, transmit a switch-off pulse to the first isolating relay.