An all-functional leakage protection plug for ground wire charged
tripping comprises a contact, a phase
electrode, a zero
electrode and a ground
electrode of a contact switch, a zero sequence
current transformer penetrated between a phase wire and a zero wire, a test loop, an amplifying circuit, a
rectifier, controlled
silicon, a
tripping device, a zero sequence
current transformer penetrated through a ground wire, a trigger circuit, an opto-coupler switch and electric resistances, wherein the contact is equipped with a moving contact elastic blade, the contact switch is equipped with a static contact blade, the opto-couple switch comprises a
neon lamp and a photo
triode the
neon lamp and the photo
triode are placed in a dark box, the dark box is equipped with a
small hole keeping away from the photo
triode, the
neon lamp is in parallel connection with an electric resistance, and is in series connection with another electric resistance after parallel connection, two ends after series connection are connected with input ends of the zero wire and the ground wire, a collector electrode of the photo triode is connected with the positive electrode of the power source of the amplifying circuit, and an emitting electrode is connected with a trigger electrode of the controlled
silicon. The invention has the advantages of
tripping and switching off when the ground wire charges to achieve certain
voltage to guarantee safety of users, further increasing use safety, prompting users to check and remove potential safety
hazard timely, and guaranteeing
electricity utilization safety.