An electrical AC/DC converter arrangement comprising at least the following components - an AC circuit breaker, and - a rectifier, and - at least one smoothing capacitor, and - at least one first current sensor, and - a control and monitoring unit, an input of the AC circuit breaker forming an AC input of the arrangement, an output of the AC circuit breaker being connected, at least indirectly by way of a circuit, to an input of the rectifier, the smoothing capacitor connecting a first output of the rectifier to a second output of the rectifier, characterised in that the electrical AC/DC converter arrangement further comprises at least one first isolating relay for electrical isolation, the first output of the rectifier further being connected, at least indirectly by way of a circuit, to an input of the first isolating relay, an output of the first isolating relay forming a first DC output of the arrangement and being provided for connecting a DC network to at least one first DC load, the first current sensor being arranged between the smoothing capacitor and the isolating relay, and the AC circuit breaker, the first current sensor and the first isolating relay being connected by way of a controller to the control and monitoring unit, the control and monitoring unit being designed to initiate a separation of the AC input from the DC output (12, 28) in a first step upon detection of a short-circuit current such that a resonant circuit consisting of the smoothing capacitor and an inductance of the DC network connected to the first DC output (12, 28) being excited so as to oscillate, the first isolating relay subsequently being opened. - an AC circuit breaker, and - a rectifier, and - at least one smoothing capacitor, and - at least one first current sensor, and - a control and monitoring unit, an input of the AC circuit breaker forming an AC input of the arrangement, an output of the AC circuit breaker being connected, at least indirectly by way of a circuit, to an input of the rectifier, the smoothing capacitor connecting a first output of the rectifier to a second output of the rectifier, characterised in that the electrical AC/DC converter arrangement further comprises at least one first isolating relay for electrical isolation, the first output of the rectifier further being connected, at least indirectly by way of a circuit, to an input of the first isolating relay, an output of the first isolating relay forming a first DC output of the arrangement and being provided for connecting a DC network to at least one first DC load, the first current sensor being arranged between the smoothing capacitor and the isolating relay, and the AC circuit breaker, the first current sensor and the first isolating relay being connected by way of a controller to the control and monitoring unit, the control and monitoring unit being designed to initiate a separation of the AC input from the DC output (12, 28) in a first step upon detection of a short-circuit current such that a resonant circuit consisting of the smoothing capacitor and an inductance of the DC network connected to the first DC output (12, 28) being excited so as to oscillate, the first isolating relay subsequently being opened.