Patent ID: 7053626

Claim:
A device for monitoring the connection of an electrical supply unit, comprising: a voltage detector ( 32 ), wherein said voltage detector ascertains phase voltages ( 14 ); a current detector ( 32 ), wherein said current detector ascertains phase currents ( 38 ); a transformation unit ( 66 ), wherein said transformation unit converts the phase currents ( 36 ), into at least one transverse current ( 62 ) based on a theory of field-oriented regulation, wherein in said field-oriented regulation, detected phase currents are divided into transverse currents and longitudinal currents, wherein the transverse current is perpendicular to the longitudinal current and oriented in the same direction as a network voltage, wherein for monitoring at least one supply connection ( 28 , 36 ), by way of which an electrical supply unit ( 32 ) is supplied, a monitoring device ( 34 ) with regulation and control functionality is provided, which evaluates a course of the transverse current ( 62 ) for monitoring the connection.