A process for the prevention of the top in tens of the circuit branches of the existing electrical short circuits and associated arrangement

摘要

The invention relates to a method for the prevention of the top where the circuit to existing short circuits in branches, in which, in a test circuit a brief network connection to a defined point in time of the mains voltage and at least the current in the test period as a criterion for a short circuit is detected and evaluated. According to the invention, by using an additional test resistor, which in the test circuit in series to a semiconductor switch is arranged preferably, the short-circuit current is limited, and only the test current and / or the test voltage for the recognition of the short circuit be used. In the case of the associated arrangement is in the test circuit (i) in series to the semiconductor switch (3) a test resistor (5) with a defined resistance value (r, φ b φ) is arranged whose resistance value (r, φ b φ) is clearly greater than the network impedance.