DEVICE FOR SIGNALLING SHORT-CIRCUIT OCCURENCE IN MEDIUM VOLTAGE OVER-GROUND SYSTEMS

摘要

invnetia refers to a device for signalling network short circuit in air, medium voltage, characterized in that it is composed of a relay signalwho apply, on the one hand, a signal proportional to the value of the current line, through a power transformer.in order indicarii of occurrence of a short circuit line, and on the other side is connected to the voltage phase - earth through a condenser pressure.in order indicarii normal functinare status, in case of voltage on the line at face value.the signalling being composed of two electromagnets acting on the same unit cell.composed of two ferromagnetic solidarizate caulk by two rods and a signalling element so located,that execute a movement of translation between the two electromagnets magetice circuits of a distance sufficient to achieve a state of operation vizibilade signalling at a distancethe earth conductor with distance of lea average voltage.