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Electric leakage prevention plug circuit

A leakage protection plug and circuit technology, applied in emergency protection circuit devices, circuits, circuit devices, etc., can solve the problems of induced voltage erroneous tripping, complex current, erroneous tripping, etc., and achieve the effect of overcoming erroneous tripping

Active Publication Date: 2013-10-09
YUYAO JIARONG ELECTRONICS & ELECTRIC APPLIANCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. When the voltage detection transformer on the ground line is used for detection, the current on the user's ground line is very complicated, and it is easy to generate induced voltage and cause false tripping
[0005] 2. In actual use, some substations have charged zero line. This kind of electricity has no effect on electrical appliances, but it is easy to trigger the detection of the voltage detection transformer on the ground line and cause false tripping.

Method used

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Embodiment Construction

[0018] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0019] Such as figure 1 and figure 2 The leakage protection plug circuit shown includes indicator light circuit, neutral wire N, ground wire E, live wire L, release device, rectifier circuit D1, step-down circuit, reverse isolation circuit, over-temperature detection circuit, and test circuit , the first resistor R16, the first magnetic induction coil ZCT1, the first amplifier circuit, and the thyristor SCR, wherein the indicator light circuit is composed of LED lights, resistor R4, resistor R5, and resistor R6 in series, and the step-down circuit is composed of resistors R10 to Composed of resistor R15, the reverse isolation circuit includes diode D3 and diode D4 to pr...

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PUM

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Abstract

The invention discloses an electric leakage prevention plug circuit which comprises an indicating lamp circuit, a null wire, a ground wire, a live wire, a buckle releasing device, a rectifying circuit, a step-down circuit, a reverse isolation circuit, an overtemperature detection circuit, a testing circuit, a first resistor, a first magnetic induction loop, a first amplifying circuit, controllable silicon, a second magnetic induction loop, a third magnetic induction loop and a second amplifying circuit. According to the electric leakage prevention plug circuit, the type of a needed mutual inductor can be chosen through a change-over switch, and the defect of mistrip caused by the charged null wire is overcome.

Description

technical field [0001] The invention relates to the field of electrical safety protection devices, in particular to a leakage protection plug circuit. Background technique [0002] Existing plugs with live protection devices for ground wires, such as all-purpose leakage protection plugs, generally mean that the protection device (plug) can be disconnected when there is leakage in the phase and neutral wires, and it can also be disconnected when the ground wire is charged. It generally includes the phase, zero and ground three poles connected by the moving contact elastic sheet and the static contact, the zero-sequence current transformer passing through the phase and the neutral line, the test circuit, the amplifier circuit, the rectifier, the thyristor, the disconnector Buckle, zero-sequence current transformer passing through the ground wire, in addition to detecting whether there is leakage current between the load phase and neutral wire, it also detects whether there is ...

Claims

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Application Information

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IPC IPC(8): H02H3/32H01R13/66H01R13/713
Inventor 钱加灿
Owner YUYAO JIARONG ELECTRONICS & ELECTRIC APPLIANCE CO LTD
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