A leakage protector with leakage alarm

Abstract

The invention discloses a leakage protector with a leakage alarm function, and relates to the technical field of leakage protectors. The leakage protector comprises an action module, a leakage protection control module, a leakage detection module and a leakage alarm module, wherein the action module is used for disconnecting a power supply; the leakage protection control module is used for controlling the action module to disconnect the power supply; the leakage detection module is used for detecting whether a ground wire, a fire wire and a zero wire leak current or not; when leakage is detected, the leakage detection module sends out a leakage signal, and the leakage protection control module sends out a power-off signal after receiving the leakage signal; the action module disconnects the power supply after receiving the power-off signal; and the leakage alarm module sends out an alarm after receiving the power-off signal. Compared with the prior art, the leakage protector has the advantages that the power supply of a load is not disconnected, an alarm is sent out through the leakage alarm module, and the leakage alarm module only stops alarming when the leakage alarm module is cut off, so that the leakage protector is safer.

Description

technical field [0001] The invention relates to the technical field of earth leakage protectors, in particular to an earth leakage protector with an electric leakage alarm. Background technique [0002] With the improvement of living standards, the penetration rate of household water heaters is getting higher and higher, and electric shock incidents are not uncommon when using water heaters. Therefore, water heaters need a leakage protector to protect the safety of users, and the existing leakage protectors have many deficiencies. [0003] As disclosed in the Chinese invention CN3178492A, the earth leakage protection device with electrified protection of the ground wire includes three poles of the phase line L, the neutral line N, and the ground line E with switches, and the zero-sequence current mutual inductance passing through the phase line L and the neutral line N. device, test circuit, release, rectifier circuit, power step-down, thyristor, and a current detector and d...

AI Technical Summary

Problems solved by technology

[0003] As disclosed in the Chinese invention CN3178492A, the earth leakage protection device with electrified protection of the ground wire includes three poles of the phase line L, the neutral line N, and the ground line E with switches, and the zero-sequence current mutual inductance passing through the phase line L and the neutral line N. device, test circuit, release, rectifier circuit, power step-down, thyristor, and a current detector and dual-input amplifier, one end of the primary coil of the current detector is connected to the ground wire E, and the primary coil of the current detector The other end of the coil is connected in series with a large-resistance current-limiting step-down circuit and then connected to the neutral line N, the secondary coil of the current detector is connected to one input end of the dual-input amplifier, and the two output ends of the dual-input amplifier are respectively connected to the two The trigger pole of a thyristor is connected, and the output terminal of the zero-sequence current transformer is connected to the other input terminal of the dual-input terminal amplifier; although this invention can simultaneously detect whether the neutral wire, the live wire and the ground wire are leaking, but the invention will only If the power supply is disconnected when a leakage occurs, the user does not know what caused the power failure of the water heater, so the user is likely to try to re-power the water heater without solving the leakage problem, which makes the user directly Exposure to risk of electric shock

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