Procedure and device for measuring the electrical current supplied by a power line to a railway vehicle

Device for measuring the electrical current supplied by a power line to a railway vehicle characterized by comprising a unit for measuring high voltage comprising connecting means (2) able to connect the device in at least two known points connection (4) of a power bus (3) of the vehicle, first measuring means (7) allowing the measurement of a potential difference between the two bus junction points, correction means (10) of the measured value and means estimation of the current (9, 10) from the potential difference.