Patent ID: 8823503

Claim:
A motor vehicle comprising: an onboard high-voltage power supply system, a high-voltage source for supplying consumers of the onboard high-voltage power supply system with electrical energy, an electrical disconnection device configured to electrically disconnect the consumers from the onboard high-voltage power supply system to enable safe maintenance work on the onboard high-voltage power supply system, a measuring device for inductively measuring a voltage in the onboard high-voltage power supply system, a plurality of signal emission devices arranged at different positions of the motor vehicle and connected to the inductive measuring device and configured to display a connection state of the high-voltage source with the onboard high-voltage power supply system, and an onboard low-voltage power supply connected to the signal emission devices, wherein the signal emission devices are activated for outputting a predetermined signal when the high-voltage source is disconnected from the onboard high-voltage power supply system during maintenance work and the onboard high-voltage power supply system has zero voltage, and wherein the signal emission devices are deactivated and do not output the predetermined signal or are unable to output the predetermined signal, when the high-voltage source is connected to the onboard high-voltage power supply system during maintenance work and the onboard high-voltage power supply system has a non-zero voltage.