Arrangement which comprises at least one series circuit including at least two series-connected submodules and an inductor, wherein - at least one of the submodules of one or a plurality of the series circuits includes a step-up/step-down converter and a storage module, characterized in that - a protective module including at least one first and one second actuator (A1, A2, A3) is electrically connected between the step-up/step-down converter and the storage module, wherein the protective module has a triggering unit which is designed to generate a trigger signal for activating or electrically closing at least one of the actuators (A1, A2, A3) if at least one measured value indicates a fault, in particular reaches or exceeds a predefined threshold, wherein - the triggering unit is designed in such a way that it generates the trigger signal if the magnitude of the current at a first or second input terminal of the protective module reaches or exceeds a predefined first current threshold, the magnitude of the current at a first or second output terminal of the protective module reaches or exceeds a predefined second current threshold, and/or the magnitude of the voltage between the first and second output terminals of the protective module reaches or exceeds a predefined voltage threshold, wherein - the protective module has a first and a second input terminal for connecting to the step-up/step-down converter, and at least two actuators, of which a second actuator (A2, A3) is connected between the first input terminal of the protective module and an internal terminal of the protective module or between the first output terminal of the protective module and an internal terminal of the protective module and a first actuator between the internal terminal of the protective module and the second input terminal, wherein the first actuator is an irreversibly switching pyrotechnically driven switch and the second actuator is a fuse, wherein the first actuator is electrically arranged in such a way that, in the activated state, it short-circuits a first and a second input terminal via which the protective module is connected to the step-up/step-down converter, and/or it short-circuits a first and a second output terminal via which the protective module is connected to the storage module. - at least one of the submodules of one or a plurality of the series circuits includes a step-up/step-down converter and a storage module, characterized in that - a protective module including at least one first and one second actuator (A1, A2, A3) is electrically connected between the step-up/step-down converter and the storage module, wherein the protective module has a triggering unit which is designed to generate a trigger signal for activating or electrically closing at least one of the actuators (A1, A2, A3) if at least one measured value indicates a fault, in particular reaches or exceeds a predefined threshold, wherein - the triggering unit is designed in such a way that it generates the trigger signal if the magnitude of the current at a first or second input terminal of the protective module reaches or exceeds a predefined first current threshold, the magnitude of the current at a first or second output terminal of the protective module reaches or exceeds a predefined second current threshold, and/or the magnitude of the voltage between the first and second output terminals of the protective module reaches or exceeds a predefined voltage threshold, wherein - the protective module has a first and a second input terminal for connecting to the step-up/step-down converter, and at least two actuators, of which a second actuator (A2, A3) is connected between the first input terminal of the protective module and an internal terminal of the protective module or between the first output terminal of the protective module and an internal terminal of the protective module and a first actuator between the internal terminal of the protective module and the second input terminal, wherein the first actuator is an irreversibly switching pyrotechnically driven switch and the second actuator is a fuse, wherein the first actuator is electrically arranged in such a way that, in the activated state, it short-circuits a first and a second input terminal via which the protective module is connected to the step-up/step-down converter, and/or it short-circuits a first and a second output terminal via which the protective module is connected to the storage module.