Abstract: A measuring unit for simultaneous measurement of two current values and two voltage values of a power line with three high-voltage conductors includes: three two-pole electrical interconnections, each interconnection being configured to be connected between two separated ends a high-voltage conductors; a first and second current sensor, configured and arranged to measure a current through the first interconnection and through the third interconnection respectively; and a first and second voltage sensor, configured and arranged to measure a voltage between the first and second interconnection and between the second and third interconnection. The measurement of the two current values and the two voltage values is at a floating potential. This measuring unit may be installed directly on all three phases, of a substation for example, with its own internal power source and with no ground connection.

Abstract: A measuring unit for simultaneous measurement of two current values and two voltage values of a power line with three high-voltage conductors includes: three two-pole electrical interconnections, each interconnection being configured to be connected between two separated ends a high-voltage conductors; a first and second current sensor, configured and arranged to measure a current through the first interconnection and through the third interconnection respectively; and a first and second voltage sensor, configured and arranged to measure a voltage between the first and second interconnection and between the second and third interconnection. The measurement of the two current values and the two voltage values is at a floating potential. This measuring unit may be installed directly on all three phases, of a substation for example, with its own internal power source and with no ground connection.