Motor vehicle has two power supplies of different voltage for different consumers and each with intelligent current distributor which monitor the supplies for short circuiting

摘要

The power supplies are designed with the higher voltage supply having a generator (18) and battery and/or relevant energy accumulator whilst the second lower supply has a battery. The power supplies feed different consumers and each have an intelligent current distributor (15, 20) which monitor the supplies for short circuiting. The current distributor of the lower supply additionally monitors the pole protection. The lower supply contains a voltage converter whose output is connected to the higher voltage supply. The leads of the two networks are separated.