Novel protection scheme for residual current device‐based electric fault time detection and touch current identification

Abstract

This study proposes a novel protection scheme for residual current devices (RCDs) based on the theory of skewness and the least squares‐support vector machine (LS‐SVM). The skewness of the residual current is applied to detect the electric shock fault time, and the LS‐SVM regression technique is used to perform touch current identification. The experimental test results indicate that the protection scheme can not only detect the electric shock fault time correctly and rapidly but also effectively recognise the circulation through the animal's current. Moreover, the proposed protection technique can provide valuable information for developing new generations of RCDs.