Patent ID: 6201479
Filing Date: 2001-03-13
Classification: B60R,G01R

Abstract:
Circuit arrangement for monitoring leakage currents of a circuit which includes a plurality of inductive loads connected in parallel to a supply line and adapted to be connected to the second pole of a supply voltage source or to ground by way of individual switches, and wherein the supply line is adapted to be connected by way of a main switch to the first pole of the supply voltage source and, for leakage current checks, to a test signal source which causes a potential variation on the supply line that can be evaluated for leakage current detection, comprising:a supply voltage source;a main switch for connecting said supply voltage source to said plurality of inductive loads;a test current source for providing a test signal on the supply line which is connected to the supply voltage source,means for activating said test current source prior to each closing of the main switchmeans for monitoring the voltage potential occurring across the supply line, andmeans for evaluating said voltage potential occurring across said supply line to determine if a leakage current is present.