ERFASSUNGS- UND BEGRENZUNGSSYSTEM VON EFFEKTEN VON ISOLATIONSVERLUSTEN EINES ELEKTRISCHEN TRANSFORMATORS

摘要

Electric transformer (T) comprising a first winding, called primary (P), at least a second winding, called secondary (S), switches (INT), and a current detection system (DIS, SEC), characterized in that that it comprises at least one metallic screen (E) having a connection point connected to a neutral potential of the primary winding or intended to be connected to an electrical ground (ME) and placed between the primary winding (P) and the at least one secondary winding (S), the screen (E) being made of an electrically conductive material having a melting temperature higher than that of the materials constituting the windings (P, S); in that the primary winding ( P) includes an input intended to be connected to an external energy source (ALIM), the switches (INT) are placed at the input of the primary winding (P) so as to be able to isolate the primary winding (P ) from the external energy source (ALIM) and that the current detection system (DIS, SEC) is configured to detect a current at the input of the primary winding (P) or a current at the connection point and to close or open the switches (INT) according to current detection, the detection system being differential or thermal.