CN203519761U - Anti-error-connection detecting circuit for zero line and live line of AC power - Google Patents
Anti-error-connection detecting circuit for zero line and live line of AC power Download PDFInfo
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- CN203519761U CN203519761U CN201320662224.XU CN201320662224U CN203519761U CN 203519761 U CN203519761 U CN 203519761U CN 201320662224 U CN201320662224 U CN 201320662224U CN 203519761 U CN203519761 U CN 203519761U
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- 208000033999 Device damage Diseases 0.000 description 5
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Abstract
An anti-error-connection detecting circuit for a zero line and a live line of AC power relates to the technical field of a detecting circuit. The anti-error-connection detecting circuit comprises a photoelectric coupler U1, and a zero-line-and-live-line reversal connection reminding circuit. A light source of the photoelectric coupler U1 is arranged between the zero line N of the AC power and ground. A light receiver of the photoelectric coupler U1 is connected with the zero-line-and-live-line reversal connection reminding circuit. According to grounding voltage difference between the live line and the zero line, when the zero line and the live line of commercial power are reversely connected, higher grounding potential of the live line L of the commercial power can cause conduction of the photoelectric coupler U1, and the conduction of the photoelectric coupler U1 causes operation of the zero-line-and-live-line reversal connection reminding circuit, thereby representing reversal connection of the zero line and the live line and performing an alarm function. On the contrary, the zero-line-and-live-line reversal connection reminding circuit does not operate, and quick detection for reversal connection of the zero line and the live line of the AC power can be realized, thereby reducing potential hazard for personnel safety and reducing equipment damage possibility. Furthermore the anti-error-connection detecting circuit has the advantages of: simple circuit, accurate determination and low cost.
Description
Technical field
The invention relates to testing circuit technical field, particularly relates to a kind of interchange electrical zero live wire anti-misconnection testing circuit.
Background technology
Alternating current generally refers to the periodically variable voltage of size and Orientation intercropping at any time or electric current.
Alternating current (civil power) application is extensive especially, is often applied to the every field of electronic circuit, but a lot of electronic equipment does not carry out zero live wire to alternating current, detects, or detect inaccurate, therefore, there is a lot of personal safety hidden danger, also can make once in a while the problem of device damage.
Summary of the invention
The object of the invention is avoid weak point of the prior art and a kind of interchange electrical zero live wire anti-misconnection testing circuit is provided, this interchange electrical zero live wire anti-misconnection testing circuit can be realized the fast detecting that exchanges the reversal connection of electrical zero live wire, reduce personal safety hidden danger, reduce device damage probability, and circuit is simple, accuracy of judgement, cost is low.
The purpose of this utility model is achieved through the following technical solutions:
A kind of interchange electrical zero live wire anti-misconnection testing circuit is provided, comprise photoelectrical coupler U1 and zero live wire misconnection alert circuit, the anodal connecting to neutral line N of the light emitting source of photoelectrical coupler U1, the minus earth PE of the light emitting source of photoelectrical coupler U1, the light-receiving device of photoelectrical coupler U1 connects zero live wire reversal connection alert circuit.
Wherein, between the positive pole of the light emitting source of photoelectrical coupler U1 and zero line, be connected to resistance R 1, between the negative pole of the light emitting source of photoelectrical coupler U1 and ground PE, meet a diode D1, the negative pole of the light emitting source of photoelectrical coupler U1 connects the positive pole of diode D1, the minus earth PE of diode D1.
Wherein, zero live wire misconnection alert circuit is specially sound light alarming circuit.
Wherein, sound light alarming circuit comprises diode D3, light emitting diode D2, stabilivolt ZD1, hummer BZ, triode Q1, Q2, resistance R 2, R3, R4, R5, ceramic disc capacitor C1 and digital signal processor DSP;
The 3 pin ground connection PE of photoelectrical coupler U1,4 pin of photoelectrical coupler U1 connect negative pole, one end of capacitor C 1, one end of resistance R 2 of stabilivolt ZD1, the other end ground connection of capacitor C 1, the other end of resistance R 2 connects power supply VCC;
The base stage B of the anodal connecting triode Q1 of stabilivolt ZD1, the emitter E ground connection of triode Q1, one end, one end of resistance R 3, the positive pole of diode D3 of the collector C contact resistance R4 of triode Q1;
The other end of resistance R 4 is connected with+5V, and the negative pole of diode D3 is connected to digital signal processor DSP;
The base stage B of the other end connecting triode Q2 of resistance R 3, the emitter E ground connection PE of triode Q2, the collector C of triode Q2 connects 2 pin of hummer BZ, the negative pole of the 1 pin connecting luminous diode D2 of hummer BZ, one end of the anodal contact resistance R5 of light emitting diode D2, the other end of resistance R 5 connects power supply VCC.
Wherein, triode Q1 and Q2 are the triode of NPN type.
Wherein, resistance R 1 is 510K, and resistance R 2 to R4 is 1K, and resistance R 5 is 5.1K.
The beneficial effects of the utility model: the utility model comprises photoelectrical coupler U1 and zero live wire misconnection alert circuit, the light emitting source of photoelectrical coupler U1 is connected between the zero line N and ground of alternating current, the light-receiving device of photoelectrical coupler U1 connects zero live wire reversal connection alert circuit, according to the difference of live wire and zero line voltage over the ground, when city, electrical zero live wire connects inverse time, civil power live wire L above earth potential is higher makes photoelectrical coupler U1 conducting, photoelectrical coupler U1 conducting makes the work of live wire reversal connection alert circuit, illustrate that zero line and live wire have connect instead, can play the effect of warning reminding; Otherwise live wire reversal connection alert circuit is not worked, can realize the fast detecting that exchanges the reversal connection of electrical zero live wire, reduce personal safety hidden danger, reduce device damage probability, and circuit is simple, accuracy of judgement, cost is low.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the present embodiment.
Embodiment
With the following Examples the utility model is further described.
A kind of interchange electrical zero live wire anti-misconnection testing circuit of the present embodiment, comprise photoelectrical coupler U1 and zero live wire misconnection alert circuit, the anodal connecting to neutral line N of the light emitting source of photoelectrical coupler U1, the minus earth PE of the light emitting source of photoelectrical coupler U1, the light-receiving device of photoelectrical coupler U1 connects zero live wire reversal connection alert circuit.
Wherein, between the positive pole of the light emitting source of photoelectrical coupler U1 and zero line, be connected to resistance R 1, between the negative pole of the light emitting source of photoelectrical coupler U1 and ground PE, meet a diode D1, the negative pole of the light emitting source of photoelectrical coupler U1 connects the positive pole of diode D1, the minus earth PE of diode D1.
Wherein, zero live wire misconnection alert circuit is specially sound light alarming circuit.
Wherein, sound light alarming circuit comprises diode D3, light emitting diode D2, stabilivolt ZD1, hummer BZ, triode Q1, Q2, resistance R 2, R3, R4, R5, ceramic disc capacitor C1 and digital signal processor DSP;
The 3 pin ground connection PE of photoelectrical coupler U1,4 pin of photoelectrical coupler U1 connect negative pole, one end of capacitor C 1, one end of resistance R 2 of stabilivolt ZD1, the other end ground connection of capacitor C 1, the other end of resistance R 2 connects power supply VCC;
The base stage B of the anodal connecting triode Q1 of stabilivolt ZD1, the emitter E ground connection of triode Q1, one end, one end of resistance R 3, the positive pole of diode D3 of the collector C contact resistance R4 of triode Q1;
The other end of resistance R 4 is connected with+5V, and the negative pole of diode D3 is connected to digital signal processor DSP;
The base stage B of the other end connecting triode Q2 of resistance R 3, the emitter E ground connection PE of triode Q2, the collector C of triode Q2 connects 2 pin of hummer BZ, the negative pole of the 1 pin connecting luminous diode D2 of hummer BZ, one end of the anodal contact resistance R5 of light emitting diode D2, the other end of resistance R 5 connects power supply VCC.
Wherein, triode Q1 and Q2 are the triode of NPN type.
Wherein, resistance R 1 is 510K, and resistance R 2 to R4 is 1K, and resistance R 5 is 5.1K.
The principle of work of the present embodiment is as follows:
When city's electrical zero live wire connects when normal, civil power zero line N above earth potential is lower, the resistance that resistance R 1 is 510K, photoelectrical coupler U1 does not work, 3 of photoelectrical coupler U1,4 not conductings of pin, 4 pin that are photoelectrical coupler are noble potential, now triode Q1 conducting, A point voltage is dragged down, now not conducting of triode Q2, light emitting diode D2 and hummer BZ do not work, the plus earth of diode D3, gives digital signal processor DSP by diode D3 by ground level signal, and digital signal processor DSP thinks that now AC power connects normal.
When city, electrical zero live wire connects inverse time, civil power live wire L above earth potential higher (being 220V), after being resistance R 1 step-down of 510K, 1 of photoelectrical coupler U1, the light emitting diode conducting work of 2 pin, 3 of photoelectrical coupler U1, 4 pin conductings, now 4 pin of photoelectrical coupler U1 are pulled down to ground, triode Q1 base potential is low not conducting, A point is connected with+5V by earth resistance R4, now A point voltage is 5V, A point is connected with the base stage of triode Q2 by resistance R 3, triode Q2 conducting, light emitting diode D2 now, hummer BZ work, send audible and visual alarm, remind operating personnel that zero live wire connects instead, in order to avoid cause personal safety hidden danger and prevent that the phenomenons such as device damage from occurring.The positive pole of diode D3 meets power supply+5V by resistance R 4, now by diode D3, by high level signal, give digital signal processor DSP (digital signal processor DSP thinks that now AC power malunion is normal, and digital signal processor DSP sends the actions such as signal controlling actuating equipment shutdown).
The present embodiment is according to the difference of live wire and zero line voltage over the ground, when city, electrical zero live wire connects inverse time, civil power live wire L above earth potential is higher makes photoelectrical coupler U1 conducting, photoelectrical coupler U1 conducting makes the work of live wire reversal connection alert circuit, illustrate that zero line and live wire have connect instead, can play the effect of warning reminding; Otherwise live wire reversal connection alert circuit is not worked, can realize the fast detecting that exchanges the reversal connection of electrical zero live wire, reduce personal safety hidden danger, reduce device damage probability, and circuit is simple, accuracy of judgement, cost is low.
Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model; but not restriction to the utility model protection domain; although the utility model has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement the technical solution of the utility model, and not depart from essence and the scope of technical solutions of the utility model.
Claims (6)
1. one kind exchanges electrical zero live wire anti-misconnection testing circuit, it is characterized in that: comprise photoelectrical coupler U1 and zero live wire misconnection alert circuit, the anodal connecting to neutral line N of the light emitting source of photoelectrical coupler U1, the minus earth PE of the light emitting source of photoelectrical coupler U1, the light-receiving device of photoelectrical coupler U1 connects zero live wire reversal connection alert circuit.
2. a kind of interchange electrical zero live wire anti-misconnection testing circuit as claimed in claim 1, it is characterized in that: between the positive pole of the light emitting source of photoelectrical coupler U1 and zero line, be connected to resistance R 1, between the negative pole of the light emitting source of photoelectrical coupler U1 and ground PE, meet a diode D1, the negative pole of the light emitting source of photoelectrical coupler U1 connects the positive pole of diode D1, the minus earth PE of diode D1.
3. a kind of interchange electrical zero live wire anti-misconnection testing circuit as claimed in claim 2, is characterized in that: zero live wire misconnection alert circuit is specially sound light alarming circuit.
4. a kind of interchange electrical zero live wire anti-misconnection testing circuit as claimed in claim 3, it is characterized in that: sound light alarming circuit comprises diode D3, light emitting diode D2, stabilivolt ZD1, hummer BZ, triode Q1, Q2, resistance R 2, R3, R4, R5, ceramic disc capacitor C1 and digital signal processor DSP;
The 3 pin ground connection PE of photoelectrical coupler U1,4 pin of photoelectrical coupler U1 connect negative pole, one end of capacitor C 1, one end of resistance R 2 of stabilivolt ZD1, the other end ground connection of capacitor C 1, the other end of resistance R 2 connects power supply VCC;
The base stage B of the anodal connecting triode Q1 of stabilivolt ZD1, the emitter E ground connection of triode Q1, one end, one end of resistance R 3, the positive pole of diode D3 of the collector C contact resistance R4 of triode Q1;
The other end of resistance R 4 is connected with+5V, and the negative pole of diode D3 is connected to digital signal processor DSP;
The base stage B of the other end connecting triode Q2 of resistance R 3, the emitter E ground connection PE of triode Q2, the collector C of triode Q2 connects 2 pin of hummer BZ, the negative pole of the 1 pin connecting luminous diode D2 of hummer BZ, one end of the anodal contact resistance R5 of light emitting diode D2, the other end of resistance R 5 connects power supply VCC.
5. a kind of interchange electrical zero live wire anti-misconnection testing circuit as claimed in claim 4, is characterized in that: triode Q1 and Q2 are the triode of NPN type.
6. a kind of interchange electrical zero live wire anti-misconnection testing circuit as claimed in claim 4, is characterized in that: resistance R 1 is 510K, and resistance R 2 to R4 is 1K, and resistance R 5 is 5.1K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320662224.XU CN203519761U (en) | 2013-10-25 | 2013-10-25 | Anti-error-connection detecting circuit for zero line and live line of AC power |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320662224.XU CN203519761U (en) | 2013-10-25 | 2013-10-25 | Anti-error-connection detecting circuit for zero line and live line of AC power |
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| CN203519761U true CN203519761U (en) | 2014-04-02 |
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| CN201320662224.XU Expired - Lifetime CN203519761U (en) | 2013-10-25 | 2013-10-25 | Anti-error-connection detecting circuit for zero line and live line of AC power |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105116274A (en) * | 2015-08-28 | 2015-12-02 | 广东美的暖通设备有限公司 | Wiring detection device, three-phase power supply equipment and wiring detection method |
| CN106501663A (en) * | 2016-10-19 | 2017-03-15 | 广东盈科电子有限公司 | A kind of detection exchange ground wire connection whether good method |
| CN106526361A (en) * | 2016-10-25 | 2017-03-22 | 珠海格力电器股份有限公司 | Three-phase driving board fault determining circuit and three-phase driving board |
| CN110794339A (en) * | 2019-10-09 | 2020-02-14 | 国网山东省电力公司东平县供电公司 | Centralized acousto-optic alarm power-off indicator, mechanism and method |
-
2013
- 2013-10-25 CN CN201320662224.XU patent/CN203519761U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105116274A (en) * | 2015-08-28 | 2015-12-02 | 广东美的暖通设备有限公司 | Wiring detection device, three-phase power supply equipment and wiring detection method |
| CN106501663A (en) * | 2016-10-19 | 2017-03-15 | 广东盈科电子有限公司 | A kind of detection exchange ground wire connection whether good method |
| CN106526361A (en) * | 2016-10-25 | 2017-03-22 | 珠海格力电器股份有限公司 | Three-phase driving board fault determining circuit and three-phase driving board |
| CN106526361B (en) * | 2016-10-25 | 2024-02-02 | 珠海格力电器股份有限公司 | Three-phase driving plate fault determining circuit and three-phase driving plate |
| CN110794339A (en) * | 2019-10-09 | 2020-02-14 | 国网山东省电力公司东平县供电公司 | Centralized acousto-optic alarm power-off indicator, mechanism and method |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20140402 |
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| CX01 | Expiry of patent term |