A zero sequence current sensor for power monitoring and leakage protection

The utility model discloses a zero-sequence current sensor for power monitoring and leakage protection, which comprises an insulating core tube, a three-phase phase sequence current induction coil isarranged around the insulating core tube, two ends of the insulating core tube are respectively connected with a sleeve, and the tail end of each sleeve is provided with a cable clamping structure; the device further comprises a rectification mutual inductance coil and a wireless signal emitter, the three-phase phase sequence current output end of the three-phase phase sequence current induction coil is connected to the two ends of a zero sequence output loop respectively, and the zero sequence output loop is connected with a primary coil of a rectification mutual inductance line and a zero sequence sampling resistor in series respectively. And a secondary coil of the rectification mutual inductance line is connected in series with the wireless signal transmitter through a voltage stabilizing resistor. Compared wi