DEVICE FOR SIGNALLING SHORT-CIRCUIT OCCURRENCE IN OVER-GROUND SYSTEMS

摘要

the invention refers to a device for signalling overhead medium voltage short circuits in networks, according to the main invention patent no.99562, comprising a transformer with three u00eenfasurari relay, which supplies a signal flare so proportionally with short-circuit current on lineand a signal proportional to the nominal line, a block of u00eenfasurarilor connecting contacts providing differential voltage in normal operation.and in providing additional u00eenserierea regime defect of u00eenfasurarilor tension and connecting them to the rectifier.the maximum transfer of energy to the coil electromagnetului defect signalling relay being assured by connecting a capacitor in parallel with the current transformer through u00eenfasurareatr a normal close contact of the contacts.