Large-signal inductance measuring device for performing a measuring operation for measuring an inductance (QTI, LTI) at an electrical energy supply line arrangement (EL, ZL) operated with a DC voltage and having a first conductor and a second conductor, wherein the large-signal inductance measuring device is configured for arrangement between a first portion of the energy supply line arrangement (EL, ZL), which is connected to an electrical energy source and comprises a source-side part of the inductance, and a second portion of the energy supply line arrangement (EL, ZL), which is connected to an electrical load and comprises a load-side part of the inductance; the large-signal inductance measuring device including: a disconnecting switch for electrically disconnecting the first conductor of the energy supply line arrangement (EL, ZL); a first series circuit (3, 4) including a first capacitive arrangement and a first diode arrangement, wherein a first end of the first series circuit (3, 4) is electrically connected to the first conductor at a source-side side of the disconnecting switch, and which is configured such that, after disconnecting the first conductor, a first current caused by the source-side part of the inductance flows through the first series circuit (3, 4), which current leads to a first change in voltage at the first capacitive arrangement; a first measuring device for measuring the first change in voltage; a second series circuit (6, 7) including a second capacitive arrangement and a second diode arrangement, wherein a first end of the second series circuit (6, 7) is electrically connected to the first conductor at a load-side side of the disconnecting switch, and which is configured such that, after disconnecting the first conductor, a second current caused by the load-side part of the inductance flows through the second series circuit (6, 7), which current leads to a second change in voltage at the second capacitive arrangement; a second measuring device for measuring the second change in voltage; a third measuring device for measuring a third current on the first conductor before the first conductor is disconnected; and an evaluation device for evaluating the measured first change in voltage, the measured second change in voltage, and the measured third current in order to determine the source-side part of the inductance from the measured first change in voltage and from the measured third current, and in order to determine the load-side part of the inductance from the measured second change in voltage and from the measured third current. a disconnecting switch for electrically disconnecting the first conductor of the energy supply line arrangement (EL, ZL); a first series circuit (3, 4) including a first capacitive arrangement and a first diode arrangement, wherein a first end of the first series circuit (3, 4) is electrically connected to the first conductor at a source-side side of the disconnecting switch, and which is configured such that, after disconnecting the first conductor, a first current caused by the source-side part of the inductance flows through the first series circuit (3, 4), which current leads to a first change in voltage at the first capacitive arrangement; a first measuring device for measuring the first change in voltage; a second series circuit (6, 7) including a second capacitive arrangement and a second diode arrangement, wherein a first end of the second series circuit (6, 7) is electrically connected to the first conductor at a load-side side of the disconnecting switch, and which is configured such that, after disconnecting the first conductor, a second current caused by the load-side part of the inductance flows through the second series circuit (6, 7), which current leads to a second change in voltage at the second capacitive arrangement; a second measuring device for measuring the second change in voltage; a third measuring device for measuring a third current on the first conductor before the first conductor is disconnected; and an evaluation device for evaluating the measured first change in voltage, the measured second change in voltage, and the measured third current in order to determine the source-side part of the inductance from the measured first change in voltage and from the measured third current, and in order to determine the load-side part of the inductance from the measured second change in voltage and from the measured third current.