CN104880600A - Leakage protector ground wire electric leakage alarm lamp circuit by use of optical coupler - Google Patents
Leakage protector ground wire electric leakage alarm lamp circuit by use of optical coupler Download PDFInfo
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- CN104880600A CN104880600A CN201510290726.8A CN201510290726A CN104880600A CN 104880600 A CN104880600 A CN 104880600A CN 201510290726 A CN201510290726 A CN 201510290726A CN 104880600 A CN104880600 A CN 104880600A
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- electric leakage
- optocoupler
- ground wire
- pin
- indicating lamp
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Abstract
The invention discloses a leakage protector ground wire electric leakage alarm lamp circuit by use of an optical coupler. The circuit comprises a zero wire end and a ground wire end, and further comprises a first optical coupler, an electric leakage indicating lamp LED1, a capacitor and a voltage stabilizing tube. The first pin of the first optical coupler is connected with the cathode of the voltage stabilizing tube, one end of the capacitor is connected with the anode of the voltage stabilizing tube, and the other end of the capacitor is connected with the ground wire end; and the cathode of the electric leakage indicating lamp LED1 is connected with the zero wire end, and the anode of the electric leakage indicating lamp LED1 is connected with the second pin of the first optical coupler. The circuit provided by the invention has the following advantages: an electric leakage indicating lamp loop is connected in series with the capacitor, such that the E-N input impedance can be improved, and the insulation impedance is infinitely large; the electric leakage indicating lamp loop is connected with the voltage stabilizing tube, such that the problem that the brightness voltage of the electric leakage indicating lamp is greater than the voltage of the voltage stabilizing tube when a ground wire is well grounded can be solved, and the phenomenon that the electric leakage indicating lamp is lighted by power network clutter peak-value voltage in case of low E-N voltage is solved; and the loop end of the electric leakage indicating lamp is connected in parallel with a protective element such that the problem of breakdown of such loop elements as the electric leakage indicating lamp and the like in case of E-N voltage withstanding testing is solved.
Description
Technical field
The present invention relates to earth leakage protective device technical field, particularly relate to a kind of earth leakage protective device ground wire leakage-current alarm circuit for lamp utilizing optocoupler.
Background technology
The earth leakage protective device of prior art lacks ground wire leakage warning circuit, cause earth leakage protective device can not show ground wire electric leakage situation, can not give user intuitively ground wire electric leakage instruction, user also just can not judge be which part circuit generation drain conditions.
Summary of the invention
(1) technical matters that will solve
Object of the present invention will overcome above-mentioned shortcoming exactly, aims to provide a kind of earth leakage protective device ground wire leakage-current alarm circuit for lamp utilizing optocoupler.
(2) technical scheme
For solving the problem, the present invention proposes a kind of earth leakage protective device ground wire leakage-current alarm circuit for lamp utilizing optocoupler, comprises zero line side and ground terminal, also comprises the first optocoupler, electric leakage pilot lamp LED1, electric capacity and stabilivolt; The pin 1 of described first optocoupler connects the negative pole of stabilivolt, and described electric capacity one end connects the positive pole of stabilivolt, and the other end connects ground terminal; Described electric leakage pilot lamp LED1 negative pole connects zero line side, and positive pole connects the pin 2 of the first optocoupler.
Further, be also provided with the second optocoupler, the pin 3 of described second optocoupler and pin 4 are connected to positive pole and the negative pole of stabilivolt.
Further, this circuit is also provided with protection diode D1; The positive pole connecting to neutral line end of described protection diode D1, negative pole connects the pin 1 of the first optocoupler.
Further, this circuit is also provided with protection diode D2; The positive pole connecting to neutral line end of described protection diode D2, negative pole connects the pin 1 of the first optocoupler or the pin 3 of the second optocoupler.
(3) beneficial effect
Compared with prior art, the present invention has the following advantages: electric leakage pilot lamp loop serial capacitance can improve the input impedance between E-N, and its insulation impedance is infinitely great; Electric leakage pilot lamp loop serial connection stabilivolt can solve when ground wire good earth, and electric leakage pilot lamp plays bright voltage and is greater than stabilivolt voltage, and when solving low-voltage between E-N, electrical network clutter crest voltage lights electric leakage pilot lamp phenomenon; Electric leakage pilot lamp loop end also connects protection element and solves and to puncture the loop elements such as pilot lamp that leak electricity when beating withstand voltage between E-N.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of embodiments of the invention one;
Fig. 2 is the circuit theory diagrams of embodiments of the invention two;
Fig. 3 is the circuit theory diagrams of embodiments of the invention three.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Embodiment one
As shown in Figure 1, the present invention proposes a kind of earth leakage protective device ground wire leakage-current alarm circuit for lamp utilizing optocoupler, comprises zero line side N and ground terminal E, also comprises the first optocoupler U1, electric leakage pilot lamp LED1, electric capacity C1 and stabilivolt DW1; The pin 1 of described first optocoupler U1 connects the negative pole of stabilivolt DW1, and described electric capacity C1 one end connects the positive pole of stabilivolt DW1, and the other end connects ground terminal E; Described electric leakage pilot lamp LED1 negative pole connects zero line side N, and positive pole connects the pin 2 of the first optocoupler U1.The effect of electric capacity C1 is the input impedance infinity between E-N.
This circuit is also provided with protection diode D1; The positive pole connecting to neutral line end N of described protection diode D1, negative pole connects the pin 1 of the first optocoupler U1, solves when beating withstand voltage between E-N and punctures the loop elements such as electric leakage pilot lamp.Physical circuit is see Fig. 1.
Working method: in this circuit, when ground strip piezoelectric voltage is greater than stabilivolt DW1 forward voltage, when solving low-voltage between E-N, electrical network clutter crest voltage lights electric leakage pilot lamp phenomenon, and electric current makes LED1 light through the first optocoupler U1, thus prompting ground wire is in electric leakage state.
Electric leakage pilot lamp loop serial capacitance C1 of the present invention can improve the input impedance between E-N, and its insulation impedance is infinitely great; Electric leakage pilot lamp loop serial connection stabilivolt DW1 can solve when ground wire good earth, and electric leakage pilot lamp plays bright voltage and is greater than stabilivolt DW1 voltage.
Embodiment two
As shown in Figure 2, being with the difference of embodiment one of the present embodiment: on the basis of embodiment one, is also provided with the second optocoupler U2, and the pin 3 of described second optocoupler U2 and pin 4 are connected to positive pole and the negative pole of stabilivolt DW1.
This circuit is also provided with protection diode D2; The positive pole connecting to neutral line end N of described protection diode D2, negative pole connects the pin 1 of the first optocoupler U1 or the pin 3 of the second optocoupler U2, as protect diode D2 negative pole in Fig. 2 dotted line shown in.Protection diode D2 solves when beating withstand voltage between E-N and punctures the loop elements such as electric leakage pilot lamp.
Embodiment three
The difference of the present embodiment and embodiment one is: stabilivolt DW1 can replace with resistance.See Fig. 3.
Below be only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. utilize an earth leakage protective device ground wire leakage-current alarm circuit for lamp for optocoupler, comprise zero line side and ground terminal, it is characterized in that: also comprise the first optocoupler, electric leakage pilot lamp LED1, electric capacity and stabilivolt; The pin 1 of described first optocoupler connects the negative pole of stabilivolt, and described electric capacity one end connects the positive pole of stabilivolt, and the other end connects ground terminal; Described electric leakage pilot lamp LED1 negative pole connects zero line side, and positive pole connects the pin 2 of the first optocoupler.
2. the earth leakage protective device ground wire leakage-current alarm circuit for lamp utilizing optocoupler according to claim 1, it is characterized in that: be also provided with the second optocoupler, the pin 3 of described second optocoupler and pin 4 are connected to positive pole and the negative pole of stabilivolt.
3. the earth leakage protective device ground wire leakage-current alarm circuit for lamp utilizing optocoupler according to claim 1, is characterized in that: this circuit is also provided with protection diode D1; The positive pole connecting to neutral line end of described protection diode D1, negative pole connects the pin 1 of the first optocoupler.
4. the earth leakage protective device ground wire leakage-current alarm circuit for lamp utilizing optocoupler according to claim 2, is characterized in that: this circuit is also provided with protection diode D2; The positive pole connecting to neutral line end of described protection diode D2, negative pole connects the pin 1 of the first optocoupler or the pin 3 of the second optocoupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510290726.8A CN104880600A (en) | 2015-05-29 | 2015-05-29 | Leakage protector ground wire electric leakage alarm lamp circuit by use of optical coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510290726.8A CN104880600A (en) | 2015-05-29 | 2015-05-29 | Leakage protector ground wire electric leakage alarm lamp circuit by use of optical coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104880600A true CN104880600A (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510290726.8A Pending CN104880600A (en) | 2015-05-29 | 2015-05-29 | Leakage protector ground wire electric leakage alarm lamp circuit by use of optical coupler |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080112100A1 (en) * | 2006-11-10 | 2008-05-15 | Daniel Liu | Digital electric leakage detecting and monitoring device |
| CN102332699A (en) * | 2011-07-28 | 2012-01-25 | 深圳市良辉科技有限公司 | Ground wire safety voltage control system |
| CN204131087U (en) * | 2014-07-29 | 2015-01-28 | 余姚市中建电器有限公司 | Earth leakage protective device |
| CN104868444A (en) * | 2015-05-15 | 2015-08-26 | 余姚市嘉荣电子电器有限公司 | Intelligent wireless network type leakage protector |
| CN204719117U (en) * | 2015-05-29 | 2015-10-21 | 余姚市嘉荣电子电器有限公司 | Utilize the earth leakage protective device ground wire leakage-current alarm circuit for lamp of optocoupler |
-
2015
- 2015-05-29 CN CN201510290726.8A patent/CN104880600A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080112100A1 (en) * | 2006-11-10 | 2008-05-15 | Daniel Liu | Digital electric leakage detecting and monitoring device |
| CN102332699A (en) * | 2011-07-28 | 2012-01-25 | 深圳市良辉科技有限公司 | Ground wire safety voltage control system |
| CN204131087U (en) * | 2014-07-29 | 2015-01-28 | 余姚市中建电器有限公司 | Earth leakage protective device |
| CN104868444A (en) * | 2015-05-15 | 2015-08-26 | 余姚市嘉荣电子电器有限公司 | Intelligent wireless network type leakage protector |
| CN204719117U (en) * | 2015-05-29 | 2015-10-21 | 余姚市嘉荣电子电器有限公司 | Utilize the earth leakage protective device ground wire leakage-current alarm circuit for lamp of optocoupler |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20150902 |