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Earth leakage protection apparatus with conductor electric leakage detection function

A leakage protection device and conductor technology, applied in the direction of automatic disconnection emergency protection device, emergency protection circuit device, circuit device, etc., can solve problems such as fire, wire insulation damage, wire overload and heating, etc.

Inactive Publication Date: 2015-09-09
SHENZHEN LONGWAY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the output terminal of the leakage protection device is connected to the power input terminal of the electrical appliance through a long wire, in case the wire is subjected to external force and the insulation layer of the wire is damaged, or the electrical app

Method used

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  • Earth leakage protection apparatus with conductor electric leakage detection function
  • Earth leakage protection apparatus with conductor electric leakage detection function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Such as figure 1 As shown, a leakage protection device with conductor leakage detection is composed of a casing, a power supply phase line input terminal L1 and a power supply zero line input terminal N1, a switch breaking mechanism c, a zero-sequence current transformer d, a driving circuit m, and a covering conductive The first output wire L2 of the shielding layer a and the second output wire N2 covered with a conductive shielding layer b; a pair of contacts of the switch breaking mechanism c are connected between the input terminal L1 of the power phase line and the first output wire L2 , the other pair of contacts of the switch breaking mechanism c is connected between the input terminal N1 of the neutral line of the power supply and the second output conductor N2, one end of the coil K of the switch breaking mechanism c is connected to the second output conductor N2, the first output conductor L2 and The second output wire N2 passes through the zero-sequence curre...

Embodiment 2

[0016] see figure 2 As shown, it can be understood that, compared with Embodiment 1, after a short circuit between the first conductive shielding layer a and the second conductive shielding layer b in this embodiment, one end of the first resistor R1 and the second resistor R2 The connection line between one end of the zero-sequence current transformer d improves the sensitivity of detecting residual current.

[0017] Since the leakage protection device detects the load terminal leakage and triggers the working principle of the breaking mechanism of the switch breaking mechanism to be known, it will not be repeated here.

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Abstract

The invention provides an earth leakage protection apparatus with conductor electric leakage detection function. The earth leakage protection apparatus comprises a housing, a power phase line, a switch disjunction mechanism, a zero sequence current transformer, a drive circuit, a first resistor, a second resistor, a first output lead and a second output lead, wherein the switch disjunction mechanism connects the zero line input end of a power supply with the first output lead and a second output lead through two pairs of contacts, the first output lead and the second output lead pass the zero sequence current transformer from front to the back in the same direction, and the first output lead and the second output lead behind the zero sequence current transformer are respectively covered with a first conductive shielding layer and a second conductive shielding layer. The first conductive shielding layer and the second conductive shielding layer are short-circuited, and the short circuit points are respectively connected one end of the first resistor and one end of the second resistor. The other ends of the first resistor and the second resistor are respectively connected with the sections of the first output lead and the second output lead in front of the zero sequence current transformer. The earth leakage protection apparatus timely disconnects power supply when the first output lead and/or the second output lead fail.

Description

technical field [0001] The invention belongs to the technical field of electricity safety protection, in particular to a leakage protection device with conductor leakage detection. Background technique [0002] With the continuous improvement of people's living standards, more and more power input terminals of electrical appliances will be equipped with leakage protection devices to ensure the safety of electricity consumption. For the general leakage protection device, it provides protection for the leakage of the load at the output end. Once the leakage occurs at the load, the leakage protection device can detect the residual current in the current-carrying circuit and interrupt the electrical connection between the power supply terminal and the load terminal. However, when the output terminal of the leakage protection device is connected to the power input terminal of the electrical appliance through a long wire, in case the wire is subjected to external force and the ins...

Claims

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Application Information

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IPC IPC(8): H02H3/32
Inventor 陈敬祥史泽华
Owner SHENZHEN LONGWAY TECH