Patent ID: 7259537

Claim:
A polarity-reversal protector for a first power source and connected between the first power source and at least one of at least one consumer and at least one generator, comprising: a recognition arrangement recognizing whether two poles of the first power source are connected to terminals of the at least one of the at least one consumer and the at least one generator; a decoupling arrangement decoupling the first power source from the at least one of the at least one consumer and the at least one generator if the two poles have been transposed during connection to the at least one of the at least one consumer and the at least one generator according to a first polarity reversal case; the recognition arrangement recognizing the first polarity reversal case; at least one first switch; at least one first fuse; and a polarity reversal circuit connecting the two poles to one another via the at least one first switch and the at least one fuse, wherein: the at least one fuse is positioned in a connection between one of the two poles and a corresponding terminal of the at least one of the at least one consumer and the at least one generator, and the at least one first switch is activated by the recognition arrangement recognizing the first polarity reversal case, so that the at least one first switch is closed in the first polarity reversal case and the two poles are short-circuited, the polarity reversal circuit being opened via the at least one first fuse, and the first power source being decoupled from the at least one of the at least one consumer and the at least one generator.