Patent ID: 7199990
Filing Date: 2007-04-03
Classification: B60L,H02H

Abstract:
1. A device for short-circuiting a first electrical line with a second electrical line for reducing a potential difference, comprising: a voltage-monitoring device connected directly between the first electrical line and the second electrical line, the voltage-monitoring device configured to adjust a threshold value and monitor a potential difference between the first electrical line and the second electrical line; at least one first electronic switching apparatus arranged between the first electrical line and the second electrical line; at least one second electronic switching apparatus, arranged between the first electrical line and the second electrical line and antiparallel to the at least one first electronic switching apparatus, wherein a potential difference occurring between the first and the second electrical lines is adapted to be bridged by at least one of the at least one first and second electronic switching apparatuses, the at least one first electronic switching apparatus operating if the potential of the second electrical line is greater, by a predeterminable differential value, than the potential of the first electrical line, and the at least one second electronic switching apparatus operating if the potential of the first electrical line is greater, by a predeterminable differential value, than the potential of the second electrical line; wherein no mechanical switches are provided for short-circuiting the first electrical line to the second electrical line; wherein each of the at least one first and second electronic switching apparatus includes a thyristor and an electrical switch, the electrical switch operable by the voltage-monitoring device; wherein the electrical switch closes if the threshold value is exceeded, the threshold value is variable; and wherein each electrical switch is arranged in parallel with a component of a respective electronic switching apparatus, the component being one of a breakover diode and a zener diode.