Most of the current protective methods act based on the total residual current with a fixed threshold

which is difficult to identify the types of electric shock. In order to reduce the serious consequence caused by electrical shock

and aiming at low-voltage distribution network

a leakage protection scheme based on wavelet packet energy is studied. Relative entropy of wavelet packet energy is calculated according to residual current through sliding time window. The change value of relative entropy serves as a criterion for electrical shock of life entity. On this basis

the leakage protection scheme is proposed. The resistance

pork and rabbit are used to simulate different electric shocks. The results show the correctness and effectiveness of the proposed method

which is of a certain significance in developing new residual current devices.