Patent ID: 8284531
Filing Date: 2012-10-09
Classification: H02H

Abstract:
1. Voltage protection arrangement for an electronic device, comprising: a shutoff unit having an input and an output, the shutoff unit having a first voltage comparator and an electric switch which is closed in a normal case, the electric switch being located between the input and the output of the shutoff unit, and being connected to the output of the voltage comparator, the shutoff unit being constructed so as to shut off the electronic device to be protected when an unallowable voltage arises, a voltage detection unit connected to the output of the shutoff unit, the voltage detection unit having a second voltage comparator and a signal output connected to the output of the second voltage comparator for reporting an impermissible voltage, wherein the electric switch is adapted to open when an impermissible voltage is present at the input of the shutoff unit and being adapted to reclose the switch when an allowable voltage is present again, wherein the voltage detection unit has a test stage with which functioning of the second voltage comparator and of the signal output is able to be tested without influencing the electronic switch.