Patent ID: 8686716

Claim:
A current or voltage sensor for use with a busbar extending along a busbar axis, the sensor comprising: a support body extending transversely of the axis and having a proximal end juxtaposed with the busbar and a distal end spaced therefrom; a U-shaped conducting bar in the proximal end, extending transversely of the busbar axis, and having a pair of arms spaced axially of the busbar axis and having free ends transversely engaging the busbar; a Rogowski coil in the proximal end juxtaposed with the U-shaped conducting bar; a grounded screening element at the distal end, formed of conductive material, and forming a first screened chamber open transversely toward the U-shape conducting bar; a source electrode extending transversely of the busbar axis and having a proximal end engaging the U-shaped conducting bar outside the first chamber and a distal end in the first chamber; and an electrical field sensor in the first chamber juxtaposed with the distal end of the source electrode.