Design of Rogowski Coil for Sensor Head of Current Transformer

In order to solve the difficulty of measuring small current precisely,a Rogowski coil for sensor head of current transformer was designed.By improving the material and manufacturing approach,the Rogowski coil for measuring small current was achieved as sensor head of current transformer.The signal from the Rogowski coil is processed by a circuit.Test was conducted,and the result indicates that this design scheme is feasible to make the precision of the current transformer meet 0.2 grade in the national standard.