Motor vehicle supply system

A motor vehicle supply system, comprising:

• a current source;
• a supply current path;
• a power distributor connected to said current source via said supply current path;
• a plurality of load current paths;
• a plurality of integrated semiconductor switches;
• a plurality of loads each connected to said power distributor via a separate one of said load current paths with one of said integrated semiconductor switches, said loads are each further connected to said current source via said power distributor;
• current measuring units integrated in said power distributor;
• voltage measuring units integrated in said power distributor;
• a monitoring unit integrated in said power distributor, said monitoring unit being set up such that said monitoring unit identifies an imminent fault on a basis of measurement data from said current measuring units and/or measurement data from said voltage measuring units and that said monitoring unit initiating a disconnection of a respective one of said loads by means of said integrated semiconductor switches, wherein both imminent overcurrent faults and imminent arc faults are identified as the imminent fault;
• said monitoring unit being set up to monitor all of said load current paths independently of one another, so that in an event of a fault in one of said load current paths, only said respective load connected thereto is disconnected;
• a common printed circuit board having each of said loads, said integrated semiconductor switches, said current measuring units, said voltage measuring units and said monitoring unit disposed on it, said monitoring unit being common to all said loads and configured to record:
• a) an overcurrent;
• b) a short from any of said load current paths to ground;
• c) a parallel arc in any of said load current paths;
• d) a serial arc in any of said load current paths;
• and
• e) a serial arc in a ground path between said respective load and a ground potential for each of said loads;
• a measuring bridge with a bridge head, said monitoring unit identifying imminent arc faults in said load current paths by monitoring a potential difference, recorded by means of said voltage measuring units, in said measuring bridge with said bridge head in a region of said loads of said load current paths and with said bridge head in a region of said integrated semiconductor switches of said load current paths;
• and
• power transmission cables each having a plug connector, said bridge head in said region of said loads is integrated in said plug connector of said power transmission cables that connects said loads to said power distributor.

A power distributor for a motor vehicle supply system having a current source, the power distributor comprising:

• a load current path;
• an integrated semiconductor switch;
• at least one load connected to said integrated semiconductor switch via said load current path, said integrated semiconductor switch configured for connecting to the current source of the motor vehicle supply system for connecting said load to the current source via the power distributor;
• a current measuring unit;
• a voltage measuring unit;
• and
• a monitoring unit connected to said current measuring unit, said integrated semiconductor switch and said voltage measuring unit, said monitoring unit being set up such that said monitoring unit identifies an imminent fault on a basis of measurement data from said current measuring unit and/or measurement data from said voltage measuring unit and that said monitoring unit initiating a disconnection of said at least one load by means of said integrated semiconductor switch, wherein both imminent overcurrent faults and imminent arc faults are identified as the imminent fault.