CN105403756B - A kind of circuit arrangement with ground wire electrification detection function - Google Patents

A kind of circuit arrangement with ground wire electrification detection function Download PDF

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Publication number
CN105403756B
CN105403756B CN201510831845.XA CN201510831845A CN105403756B CN 105403756 B CN105403756 B CN 105403756B CN 201510831845 A CN201510831845 A CN 201510831845A CN 105403756 B CN105403756 B CN 105403756B
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electric capacity
power supply
scr
controllable silicon
poles
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CN105403756A (en
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罗永任
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FOSHAN SHUNDE AOJUN ELECTRONIC TECHNOLOGY Co Ltd
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FOSHAN SHUNDE AOJUN ELECTRONIC TECHNOLOGY Co Ltd
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Abstract

A kind of circuit arrangement with ground wire electrification detection function, it includes power circuit, level signal control circuit and low and high level switching circuit, is by the earth(E lines)Relative to when voltage difference between zero line be present and being more than more than 50VAC, voltage passes through the 5th electric capacity(C5)With the 3rd current-limiting resistance(R3)It is connected in series controllable silicon(SCR)G poles triggered, controllable silicon(SCR)Conducting, then go here and there by switching diode(D2)It is output to OUT terminal mouth so that OUT terminal mouth is to power supply(GND)Level state by low transition be high level state.Due to structure as use, detecting circuit, only the 5th electric capacity C5, the 3rd current-limiting resistance R3 and the 3rd electric capacity C3 parts of filtering are few, level switching circuit is made up of controllable silicon SCR, switching diode D2, the second electric capacity C2 and the 3rd electric capacity C3 of filtering, therefore part of the present invention is few, simple in construction, cost is low.

Description

A kind of circuit arrangement with ground wire electrification detection function
Technical field
The present invention relates to a kind of earth wire charged testing device of household electrical appliance.
Background technology
Currently available technology, a kind of circuit arrangement with ground wire electrification detection function it include power circuit, level believe Number control circuit and low and high level switching circuit.Problem be present is:Complicated, cost is high, and assembling is inconvenient.
The content of the invention
The purpose of the present invention is:A kind of circuit arrangement with ground wire electrification detection function is provided, it have it is simple in construction, The characteristics of cost is low and easy to assembly.
What the present invention was realized in:A kind of circuit arrangement with ground wire electrification detection function, it is characterised in that:It is wrapped Power circuit, level signal control circuit and low and high level switching circuit are included,
The power circuit by phase line rectified diode D1 and the first current-limiting resistance R1 contact after by voltage-regulator diode ZD1 is connected to zero line, and by first capacitor C1 one end pin, GND, other end pin connect power supply to the power supply after voltage stabilizing with connecing power supply Power supply is filtered by VDD;
The level signal control circuit by second current-limiting resistance R2 one end pin connect power vd D, other end pin with can Silicon SCR A poles connection is controlled, threeth electric capacity C3 of the K poles of controllable silicon SCR with filtering one end pin is connected, the 3rd electricity of filtering Hold C3 other end pins with connecing power supply GND;
Low and high level switching circuit:It is the 5th electric capacity C5 and the 3rd current-limiting resistance R3 series windings company closed by the earth E lines through lotus root The G poles of controllable silicon SCR are connected to, the 4th electric capacity C4 to be made an uproar by filter in parallel one end pin and the G poles of controllable silicon SCR connect, filter The 4th electric capacity C4 to make an uproar other end pin with power supply GND be connected the filter carried out to controllable silicon SCR make an uproar it is anti-interference, then by opening It is defeated that pass diode D2 A poles are connected to progress level signal detection between the K poles of controllable silicon SCR and the 3rd electric capacity C3 of filtering Go out, the second electric capacity C2 is and with the being connected in output port OUT and power supply filter capacitor between GND;
Be by the earth E lines relative to voltage difference between zero line be present and be more than more than 50VAC when, voltage passes through the 5th electric capacity C5 It is connected in series to the G poles of controllable silicon SCR and is triggered with the 3rd current-limiting resistance R3, controllable silicon SCR conducting, then go here and there by switching two poles Pipe D2 is output to OUT terminal mouth so that OUT terminal mouth GND level state is high level state by low transition to power supply.
A kind of described circuit arrangement with ground wire electrification detection function, it is characterized in that:It is steady also to include second The 4th electric capacity C4 that pressure diode ZD2, the second voltage-regulator diode ZD and the filter are made an uproar is in parallel.
A kind of circuit arrangement with ground wire electrification detection function of the present invention, due to structure as use, detect circuit Only the 5th electric capacity C5, the 3rd current-limiting resistance R3 and the 3rd electric capacity C3 parts of filtering it is few, level switching circuit by controllable silicon SCR, Switching diode D2, the second electric capacity C2 and filtering the 3rd electric capacity C3 are formed, therefore part of the present invention is few, and simple in construction, cost is low.
Brief description of the drawings
Fig. 1 is circuit diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
A kind of as shown in figure 1, circuit arrangement with ground wire electrification detection function, it is characterised in that:It includes power supply electricity Road, level signal control circuit and low and high level switching circuit,
The power circuit by phase line L rectified diode D1 and the first current-limiting resistance R1 contact after by voltage-regulator diode ZD1 is connected to zero line N, and by first capacitor C1 one end pin, GND, other end pin connect power supply to the power supply after voltage stabilizing with connecing power supply Power supply is filtered by VDD;
The level signal control circuit by second current-limiting resistance R2 one end pin connect power vd D, other end pin with can Silicon SCR A poles connection is controlled, threeth electric capacity C3 of the K poles of controllable silicon SCR with filtering one end pin is connected, the 3rd electricity of filtering Hold C3 other end pins with connecing power supply GND;
Low and high level switching circuit:It is to be contacted to connect by geodesic E the 5th electric capacity C5 closed through lotus root and the 3rd current-limiting resistance R3 The G poles of controllable silicon SCR are connected to, the 4th electric capacity C4 to be made an uproar by filter in parallel one end pin and the G poles of controllable silicon SCR connect, filter The 4th electric capacity C4 to make an uproar other end pin with power supply GND be connected the filter carried out to controllable silicon SCR make an uproar it is anti-interference, then by opening It is defeated that pass diode D2 A poles are connected to progress level signal detection between the K poles of controllable silicon SCR and the 3rd electric capacity C3 of filtering Go out, the second electric capacity C2 is and with the being connected in output port OUT and power supply filter capacitor between GND;
Be by the earth E lines relative to voltage difference be present between zero line N and be more than more than 50VAC when, voltage passes through the 5th electric capacity C5 and the 3rd current-limiting resistance R3 is connected in series and triggered to the G poles of controllable silicon SCR, controllable silicon SCR conducting, then goes here and there by switch two Pole pipe D2 is output to OUT terminal mouth so that OUT terminal mouth GND level state is high level state by low transition to power supply.
Improved as further::Also made an uproar including the second voltage-regulator diode ZD2, the second voltage-regulator diode ZD and the filter 4th electric capacity C4 is in parallel.
In use, this output end OUT level state can realize sound and light alarm and cut-out electricity simultaneously by single-chip microcomputer processing Source switch, injures and deaths of leaking electricity can be avoided much sooner.
Above-described is only the preferred embodiments of the present invention.It should be pointed out that the ordinary skill for this area For personnel, without departing from the principles of the present invention, some improvement and modification can also be made, this is also considered as the present invention's Protection domain.

Claims (2)

  1. A kind of 1. circuit arrangement with ground wire electrification detection function, it is characterised in that:It includes power circuit, level signal control Circuit and low and high level switching circuit processed,
    The power circuit is by the rectified diode of phase line(D1)With the first current-limiting resistance(R1)By voltage-regulator diode after series winding (ZD1)Zero line is connected to, the power supply after voltage stabilizing is by the first capacitor(C1)One end pin is with connecing power supply(GND), other end pin Connect power supply(VDD)Power supply is filtered;
    The level signal control circuit is by the second current-limiting resistance(R2)One end pin connects power supply(VDD), other end pin with can Control silicon(SCR)A poles connection, controllable silicon(SCR)K poles with filtering the 3rd electric capacity(C3)The connection of one end pin, filtering 3rd electric capacity(C3)Other end pin is with connecing power supply(GND);
    Low and high level switching circuit:It is by geodesic(E)The 5th electric capacity closed through lotus root(C5)With the 3rd current-limiting resistance(R3)Series winding It is connected to controllable silicon(SCR)G poles, the 4th electric capacity made an uproar by filter in parallel(C4)One end pin and controllable silicon(SCR)G poles Connection, filters the 4th electric capacity made an uproar(C4)Other end pin and power supply(GND)Connection is carried out to controllable silicon(SCR)Filter make an uproar it is anti- Interference, then pass through switching diode(D2)A poles be connected to controllable silicon(SCR)K poles with filtering the 3rd electric capacity(C3)Between Carry out level signal detection output, the second electric capacity(C2)For and be connected in output port(OUT)With power supply(GND)Between filter Ripple electric capacity;
    It is by geodesic(E)Relative to when voltage difference between zero line be present and being more than 50VAC, voltage passes through the 5th electric capacity(C5)With Three current-limiting resistances(R3)It is connected in series controllable silicon(SCR)G poles triggered, controllable silicon(SCR)Conducting, then go here and there by switch two Pole pipe(D2)It is output to output port(OUT)So that output port(OUT)To power supply(GND)Level state by low level Be converted to high level state.
  2. A kind of 2. circuit arrangement with ground wire electrification detection function according to claim 1, it is characterised in that:Also include Second voltage-regulator diode(ZD2), the second voltage-regulator diode(ZD2)With the 4th electric capacity filtered and made an uproar(C4)It is in parallel.
CN201510831845.XA 2015-11-25 2015-11-25 A kind of circuit arrangement with ground wire electrification detection function Active CN105403756B (en)

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Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN105958439A (en) * 2016-05-30 2016-09-21 深圳市良辉科技有限公司 Leakage protection device having ground wire live-line indication function

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CN2845263Y (en) * 2005-08-01 2006-12-06 梁文起 The security appliance protective device
CN102890184A (en) * 2012-10-25 2013-01-23 德讯科技股份有限公司 Optocoupler-based zero passage detecting circuit
CN104332946A (en) * 2014-11-13 2015-02-04 陈泽 Ground fault protecting circuit and ground fault breaker
CN104466896A (en) * 2013-09-18 2015-03-25 成都昊地科技有限责任公司 Electric appliance multipurpose protective device
CN104898015A (en) * 2015-06-27 2015-09-09 佛山市顺德万和电气配件有限公司 Alternating-current null-line and firing-line reverse connection and ground line abnormality detection circuit
CN205280807U (en) * 2015-11-25 2016-06-01 佛山市顺德区澳骏电子科技有限公司 Circuit arrangement with electrification of ground wire detects function

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US7715158B2 (en) * 2006-06-30 2010-05-11 Leviton Manufacturing Company, Inc. Circuit interrupter with live ground detector

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CN2845263Y (en) * 2005-08-01 2006-12-06 梁文起 The security appliance protective device
CN102890184A (en) * 2012-10-25 2013-01-23 德讯科技股份有限公司 Optocoupler-based zero passage detecting circuit
CN104466896A (en) * 2013-09-18 2015-03-25 成都昊地科技有限责任公司 Electric appliance multipurpose protective device
CN104332946A (en) * 2014-11-13 2015-02-04 陈泽 Ground fault protecting circuit and ground fault breaker
CN104898015A (en) * 2015-06-27 2015-09-09 佛山市顺德万和电气配件有限公司 Alternating-current null-line and firing-line reverse connection and ground line abnormality detection circuit
CN205280807U (en) * 2015-11-25 2016-06-01 佛山市顺德区澳骏电子科技有限公司 Circuit arrangement with electrification of ground wire detects function

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