Abstract:
A survey was made of several current shunts commercially available and/or developed by National Metrology Institutes. The design which presented the smallest physical geometry to maintain a low inductance in both the input current circuit and the output voltage circuit was selected. This is an important requirement if one aims at increased bandwidths. A lumped equivalent circuit model for cage-type current shunts assembled according to this design is described here. The ac-dc difference and phase displacement of shunts with nominal currents from 0.5 A to 20 A are computed using standard two-port network theory.
