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A self-inspection method for a leakage protector

A leakage protector and transformer technology, applied in emergency protection circuit devices, emergency protection devices with automatic disconnection, electrical components, etc. The effect of using safety

Active Publication Date: 2019-01-04
YUYAO JIARONG ELECTRONICS & ELECTRIC APPLIANCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 double-input terminal amplifier; although this invention can simultaneously detect whether the neutral wire, the live wire and the ground wire are leaking electricity, but if the invention itself If a fault occurs, the leakage protection cannot be realized, so that the user is directly exposed to the risk of electric shock

Method used

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  • A self-inspection method for a leakage protector
  • A self-inspection method for a leakage protector

Examples

Experimental program
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Embodiment 1

[0030] Such as figure 1 As shown in , the power-on detection module is used to detect whether the power-on coil is normal, and sends the detection result to the judgment module;

[0031] The trip detection module is used to detect whether the trip coil is normal, and sends the detection result to the judgment module;

[0032] The temperature detection module is used to detect the temperature between the pin and the socket, and send the detected temperature value to the judgment module;

[0033] Mains detection module is used to collect mains timing signals and voltage values, and send them to the judgment module;

[0034] In this embodiment, the first transformer is a zero-sequence transformer, which is used to detect whether the zero line and the live wire are leaking, and sends a first leakage signal to the leakage protection chip when the leakage is detected;

[0035] The first transformer detection module is a zero-sequence transformer detection module, which is used to ...

Embodiment 2

[0062] The difference between this embodiment and embodiment 1 is:

[0063] The first transformer is a ground wire transformer, which is used to detect whether the ground wire is leaking, and sends a first leakage signal to the leakage protection chip when the leakage is detected;

[0064] The first transformer detection module is a ground wire transformer detection module, which is used to simulate leakage of the ground wire;

[0065] The second transformer is a zero-sequence transformer, which is used to detect whether the zero line and the live wire are leaking, and sends a second leakage signal to the leakage protection chip when the leakage is detected;

[0066] The second transformer detection module is a zero-sequence transformer detection module, which is used to simulate the leakage of the neutral wire and the live wire.

[0067] Transformer detection steps: first lock the circuit and lock the leakage protector to prevent the leakage protector from accidentally tripp...

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Abstract

The invention discloses a self-inspection method for a leakage protector, and relates to the field of leakage protectors. The method comprises a mutual inductor detection step: first locking the leakage protector to prevent the leakage protector from accidentally tripping in the detection process; then locking the leakage protector to prevent the leakage protector from tripping. Then detecting whether the first transformer is normal or not, if not, disconnecting the power supply and sounding an alarm, and permanently prohibiting the upper electric coil from turning on the power supply; If normal, the leakage protector is reset; Then detecting whether the second transformer is normal or not, if not, disconnecting the power supply and sounding an alarm, and permanently prohibiting the upperelectric coil from turning on the power supply; If normal, the leakage protector is reset; and finally, the locking leakage protector is unlocked. Compared with the prior art, the invention improves the use safety of the leakage protector by self-inspection before power-on or regular self-inspection.

Description

technical field [0001] The invention relates to the field of earth leakage protectors, in particular to a method for self-inspection of earth leakage protectors. 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 dual-input a...

Claims

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Application Information

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IPC IPC(8): H02H3/04H02H11/00H02H5/04
CPCH02H3/044H02H5/04H02H11/00H02H11/006
Inventor 钱加灿
Owner YUYAO JIARONG ELECTRONICS & ELECTRIC APPLIANCE CO LTD