On-line analysis to localize earth leakages, in balanced to ground electrical supply systems, is a compact unit for alternating and direct current supplies without disconnecting circuits and interrupting production

摘要

The on-line analysis system to localize earth leakages, in balanced to ground electrical supply systems, has a measurement amplifier (MVS) at the control unit for earth leakage at a supply rail. The control unit is electrically linked to a thyristor or triode for alternating current (TRIAC) (T) through an opto-coupler (OK), to generate pulses with a condenser (C) and the auxiliary voltage supply (Uz) and charging resistance (R3). The control unit has at least two inductive line sensors (S) with pulse amplifiers (IVS) and an input gate (Tor) and a pulse-shape stage (F).