Device giving an indication of the presence of a three-phase voltage for medium-voltage electricity distribution substations

摘要

The three-phase indicating device incorporates a flashing light and is supplied with power from capacitors built on medium-voltage circuits having capacitances of the order of a picofarad. It consists of a thermoplastic resin moulding 1 enclosing three separate electronic circuits 2 supplied directly by the 1-picofarad capacitors through pins 3 and earthed through pins 4. These circuits are connected to sockets 8 of different colours, which allow the use of phase comparators. The mountings on the equipment 9 are produced directly by moulding. Intended particularly for use on equipment in medium-voltage electricity distribution substations. IMAGE