Electronic relay for a multifunctional protection

摘要

The electronic relay system is mounted in a cover and has a detector (I1,I2,I3) in series with each of the alternating current lines (L1,T1;L2,T2;L3,T3). The lines are connected to a load (M). The detectors are connected to an analogue interface, and then via inter-board bus connections to a microprocessor. The microprocessor controls multiple function plug-in boards (C2,C4) and a communications card (C5) for operation intervention.