Development of a residual current device based on analytical and numerical analysis of the sensitivity and unbalance of current transformer

Abstract

Based on the analysis of the principle of residual current device (ReO), the impact of sensitivity and unbalance response on the characteristics of residual current transformer (ReT) are discussed in detail. And a kind of ReT is designed by using analytical calculation and numerical simulation methods. Finally, a kind of ReD is developed in this paper.Experimental results show that the designed ReO is of good performance, thus the feasibility of the design is verified.