Electric water heater with omnibearing earth leakage protection function

The utility model relates to an electric water heater with creepage and turnoff protection function; wherein, the protector of the electric water heater comprises a plurality of zero sequence current instrument transformers, a control circuit and a trip relay, and is characterized in that: at least a zero sequence current instrument transformer (Y1) is sleeved at the inlet pipe or the outlet pipe of the electric water heater; the null line (N) and the live wire (L) drill through the other zero sequence instrument transformer (Y2) at the same time; the working power supply of the trip relay and the control circuit is arranged at the null line (N) and the live wire (L) outside the touch spot of the trip relay. The trip relay is connected in series with the power supply null line (N) and the inlet wire of the live wire (L) of the electric water heater by a polar trip relay (J2), and is connected in series with the earth wire (E) of the electric water heater by one pole of a two-pole normally closed relay (J3) and with the coil circuit of the (J2) relay by the other pole. When the protective earth wire of the water heater is not well earthed, the electrical heat tube breaks or the live wire (L) and the earth wire (E) of the power supply are short-circuited, which cause the case of the water heater to contact human bodies and the creepage, the currents drilling through the zero sequence current instrument transformers (Y1) (Y2) do not balance, and the zero sequence instrument transformers output the current signal, then the signal passes the control circuit (IC1), springs the controlled silicon (S1) (S2) and controls the trip relay (J2) and the relay (J3) to cut off the electricity. The electric water heater can provide an all-round creepage and turnoff protection to two-sided creepage such as the ubiquitous creepage phenomenon caused by failure to connect circuits by people and the electric appliance creepage.