Abstract: The invention relates to a voltage transformer (1) for transformation between a direct voltage at a direct voltage gate (2) and a single-phase or multi-phase alternating voltage at an alternating voltage gate (3) by temporal clocking of an electronic switching unit (4), via which each phase (3a-3c) of the alternating voltage gate (3) can be connected either to the positive pole or to the negative pole of the direct voltage gate (2), wherein the positive pole and/or the negative pole of the direct voltage gate (2) is connected via at least one capacitor (5, 5a, 5b) to a ground connection (7), wherein the ground connection (7) can be connected to an external ground (7a), and wherein the connection between the capacitor (5, 5a, 5b) and the ground connection (7) is guided via at least one switch element (6, 6a, 6b). The invention also relates to an electric powertrain (10) for a motor vehicle (100). The invention further relates to a motor vehicle (100) having the electric powertrain (10).

Abstract: The present invention discloses a protection apparatus for an IT network having a first and a second live line, having a signal generator which is designed to feed a first signal to the first and/or to the second live line, having a detection device which is designed to detect the profile of the fed first signal in at least one live line, and having a control device which is designed to analyze the detected profile and to output a disconnection signal when the analysis of the detected profile indicates that a living organism is in contact with the first live line and the second live line. The present invention also discloses a method and a power supply system.

Abstract: The invention relates to a surge protection device (100) for protecting an onboard power system (24) of an electric vehicle (20) from an electric surge, having the following: an input device (105) which is designed as a current terminal of the electric vehicle (20); a protection device (110) which has at least one surge arrester (111) for arresting a surge; and an interface device (115) which is designed to protect the onboard power system (24) of the electric vehicle (20) from the electric surge by coupling an outlet (110b) of the protection device (110) to the onboard power system (24).

Abstract: The present invention relates to an overvoltage protection device (100) for protecting an onboard power system (24) of an electric vehicle (20) from electrical overvoltage, having: an input device (105) which is embodied as a power connection of the electric vehicle (20); a protection device (110) which is coupled at an input (110a) to the input device (105) and has at least one overvoltage diverter (111) for diverting an overvoltage; and an interface device (115) which is configured, through coupling of an output (110b) of the protection device (110) to the onboard power system (24), to protect the onboard power system (24) of the electric vehicle (20) from the electrical overvoltage.

Abstract: The present invention discloses a protection apparatus for an IT network having a first and a second live line, having a signal generator which is designed to feed a first signal to the first and/or to the second live line, having a detection device which is designed to detect the profile of the fed first signal in at least one live line, and having a control device which is designed to analyse the detected profile and to output a disconnection signal when the analysis of the detected profile indicates that a living organism is in contact with the first live line and the second live line. The present invention also discloses a method and a power supply system.

Abstract: A method for determining the temperature change of a feeder cable of a charging device in that, in a first task, the electromagnetic input pulse is coupled into the feeder cable, the electromagnetic input pulse being able to be reflected in the feeder cable and the reflected portion returning to the charging device as reflected electromagnetic output pulse; in a second task, the pulse shape of the reflected electromagnetic output pulse is determined; in a third task, the pulse shape of the reflected electromagnetic output pulse is compared to a reference pulse shape of the reflected reference pulse; in a fourth task, the temperature change is determined by comparing the two pulse shapes.