Power leakage protector

A leakage protection device and resistance technology, applied in circuit devices, emergency protection circuit devices, emergency protection devices with automatic disconnection, etc.
CN102324718AActive Publication Date: 2012-01-18ๅˆ˜็ฟๅˆš
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
ๅˆ˜็ฟๅˆš
Publication Date
2012-01-18

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Abstract

The invention discloses a power leakage protector which not only can protect electric shock accidents caused by faults of electric appliances, but also can prevent electric shock accidents caused by accidental electrification of an earth wire. The power leakage protector is further provided with a weak current detection sensor, a primary winding and a secondary winding of the weak current detection sensor are wound on an iron core of the weak current detection sensor, a detection circuit formed by connecting the primary winding with a current-limiting resistance-capacitance element in series is connected between the earth wire and a zero wire, one output end and another output end of the secondary winding of the weak current detection sensor are respectively connected with one input end and another input end of a second group of input ends in a driving circuit of an electromagnetic coil, one wire end and another wire end of the electromagnetic coil, and the anode and cathode of a first silicon controlled thyristor, and the anode and the cathode of a second silicon controlled thyristor are respectively connected in parallel with the anode and a public electrode on an output end of a rectification circuit.
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Description

technical field

[0001] The invention relates to the technical field of electricity safety protection, in particular to an electric leakage protection device. Background technique

[0002] The Chinese patent literature publication number is CN1142618C discloses a kind of earth leakage protection device which can be opened and closed. The earth leakage protection device is not only equipped with a zero-sequence current transformer through which both the phase line and the neutral line pass, but also has a ground wire through It is an electrified detection sensor for the over ground wire, so it can not only detect whether there is any residual current between the phase wire and the neutral wire at the load end, when the residual current between the phase and neutral wires reaches the preset threshold (for example: 10mA ), it will trip immediately and cut off the phase wire, neutral wire and ground wire; and when the ground wire is accidentally electrified due to an abnormal gro...

Claims

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