High-voltage electrical system of a motor vehicle

The invention relates to a high-voltage vehicle electrical system (2) of a motor vehicle, having a high-voltage battery (4) and with a consumer network (6), which are interconnected by means of an electrical line (8), and with a Schnellabschalter (14) for separating the high-voltage battery (4) of the consumer network (6). The Schnellabschalter (14) is acted upon with an air bag signal (36). The invention further relates to a Schnellabschalter (14) and the use of an airbag signal (36).