Single-phase electronic earth leakage circuit breaker

The utility model discloses a single-phase electronic leakage circuit breaker, which comprises a miniature current transformer (ZT), an electrical leak signal amplifier (2) that is connected with the current transformer (ZT), a common relay switching device (3) that is connected to the electrical leak signal amplifier (2), a starting circuit (4) that is connected with the switching device (3), and a rectifying and voltage-stabilizing circuit that is respectively connected with the starting circuit (4) and the electrical leak signal amplifier (2). The utility model adopts reasonable circuit arrangement, uses the miniature current transformer with simpler fabrication, chooses a universal standardized contact relay, and can be produced by using standard electronic components entirely, so that the composite cost is lowered. The utility model is suitable for all unidirectional electrical leak protectors, such as an electrical leak protective plug, an electrical leak protective socket, etc.