Coaxial D-dot probe: design and testing

A new coaxial D-dot probe is designed and calibrated. A charge simulation programme is used to get the best configuration and arrangement of the probe design. The calibration is made against a conventional capacitive divider. The designed probe shows faster response and eliminate the inductive overshoot to some extent. Coaxial D-dot probes are the ideal method for fast transient measurement; especially, for these tests which incorporate high energy as for testing ZnO varistors, arresters, or arrester element(s). Examples of such test are also introduced.