DEVICE FOR DETECTING EMERGENCY OPERATION OF THREE-PHASE POWER NETWORKS WITH INSULATED NEUTRAL

摘要

Usage: relates to test and measurement equipment and may be used for non-contact determination USE emergency state three-phase electrical network associated with the presence of overvoltage in one phase, or to the lack of current flow in the phase of the Invention: The device comprises three sensor magnetic field, four phase-shifting unit, two threshold amplifier gain block, six two-input AND gates I. pulse shaper unit displaying information, a three-phase rectifier. 3 yl.