CN104578003A - Small residual current circuit breaker circuit having overvoltage protection function - Google Patents
Small residual current circuit breaker circuit having overvoltage protection function Download PDFInfo
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- CN104578003A CN104578003A CN201510042683.1A CN201510042683A CN104578003A CN 104578003 A CN104578003 A CN 104578003A CN 201510042683 A CN201510042683 A CN 201510042683A CN 104578003 A CN104578003 A CN 104578003A
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Abstract
The invention relates to a small residual current circuit breaker circuit having an overvoltage protection function. The small residual current circuit breaker circuit comprises a power input and further comprises a power circuit, a residual current and overvoltage trip control circuit, a residual current detection circuit and an overvoltage detection circuit, wherein the power circuit comprises a voltage dependent resistor MYR, a diode D3, a diode D5, a diode D6, a diode D7, a tripper L1, the tripper L1 is arranged in front of the voltage dependent resistor MYR. The residual current and overvoltage trip control circuit comprises a resistor R5, a silicon controlled rectifier D2 and a capacitor C2. The residual current detection circuit comprises sampling resistors R0 and R1, a voltage stabilizing diode D1 and an L-shaped filtering circuit. The overvoltage detection circuit comprises resistors R3 and R4 and a bidirectional trigger diode D4. The small residual current circuit breaker circuit having the overvoltage protection function is high in interference resisting capacity and ensures that a residual current signal is stable and reliable. The whole small residual current circuit breaker circuit is simple in design, stable, reliable, high in electromagnetic compatibility resisting characteristic, small in size and low in production cost and is suitable for actual demand of the market.
Description
Technical field
The present invention relates to a kind of breaker circuit, more particularly, relate to a kind of circuit of miniature residual current circuit breaker with overvoltage protection.
Background technology
In traditional small-sized residual current circuit breaker defencive function, if need to be equipped with over-voltage protecting function, product must configure a special over-voltage protection module to realize overvoltage protection.Its shortcoming: small product size is larger than former small-sized residual current circuit breaker, cooperation that is inconvenient and distribution box is assembled; Not only complex structural designs, and production cost is high, is unfavorable for the actual demand in market.
Therefore, prior art urgently has greatly improved.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, a kind of circuit of miniature residual current circuit breaker with overvoltage protection is provided, comprise: power supply inputs, and also comprises: power circuit, residual current and overvoltage dropout control circuit, residual current detection circuit and overvoltage detection circuit; Wherein, described power circuit comprises piezo-resistance MYR, diode D3, diode D5, diode D6, diode D7, and release L1, before release L1 is positioned over piezo-resistance MYR; Residual current and overvoltage dropout control circuit comprise resistance R5, controllable silicon D2, electric capacity C2; Residual current detection circuit comprises sampling resistor R0, R1, voltage stabilizing didoe D1 and L-type filter circuit; Overvoltage detection circuit comprises resistance R3, R4 and bidirectional trigger diode D4.
Have in the circuit of miniature residual current circuit breaker of overvoltage protection of the present invention, described L-type filter circuit comprises further: the resistance R2 be connected in series and electric capacity C1.
Implement the circuit of miniature residual current circuit breaker with overvoltage protection of the present invention, there is following beneficial effect: before power circuit tripping coil L1 is positioned over piezo-resistance MYR, protect piezo-resistance MYR and controllable silicon D2, improve the antijamming capability of circuit; Residual current detection circuit adopts two sampling resistor and L-type filter circuit design, guarantees that residual current signal is more reliable and more stable; It is more stable, reliable and simple that overvoltage detection circuit makes overvoltage detection circuit design by electric resistance partial pressure and bidirectional trigger diode matching detection; Simple, the anti-electromagnetic compatibility characteristic of whole circuit design is high, the volume of small product size and small-sized residual current circuit breaker is just the same simultaneously, the small-sized residual current circuit breaker solving conventional belt overvoltage protection needs to be equipped with die block and causes its volume to increase, and cooperation that is inconvenient and distribution box is assembled; And product structure design is simple, at the bottom of production cost, be applicable to very much the actual demand in market.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the circuit theory diagrams that the present invention has the first embodiment of the circuit of miniature residual current circuit breaker of overvoltage protection.
Embodiment
Refer to Fig. 1, there are for the present invention the circuit theory diagrams of the first embodiment of the circuit of miniature residual current circuit breaker of overvoltage protection.As shown in Figure 1, what provide in first embodiment of the invention has in the circuit of miniature residual current circuit breaker of overvoltage protection, at least comprises, power supply inputs, power circuit, residual current and overvoltage dropout control circuit, residual current detection circuit and overvoltage detection circuit; Wherein, described power circuit comprises piezo-resistance MYR, diode D3, diode D5, diode D6, diode D7, and release L1, before release L1 is positioned over piezo-resistance MYR; , residual current and overvoltage dropout control circuit comprise resistance R5, controllable silicon D2, electric capacity C2; Residual current detection circuit comprises sampling resistor R0, R1, voltage stabilizing didoe D1 and L-type filter circuit; Overvoltage detection circuit comprises resistance R3, R4 and bidirectional trigger diode D4.
Described L-type filter circuit comprises further: the resistance R2 be connected in series and electric capacity C1.
The present invention, by the design of above first embodiment, before power circuit tripping coil L1 is positioned over piezo-resistance MYR, protects piezo-resistance MYR and controllable silicon D2, improves the antijamming capability of circuit; Residual current detection circuit adopts two sampling resistor and L-type filter circuit design, guarantees that residual current signal is more reliable and more stable; It is more stable, reliable and simple that overvoltage detection circuit makes overvoltage detection circuit design by electric resistance partial pressure and bidirectional trigger diode matching detection; Simple, the anti-electromagnetic compatibility characteristic of whole circuit design is high, the volume of small product size and small-sized residual current circuit breaker is just the same simultaneously, the small-sized residual current circuit breaker solving conventional point overvoltage protection needs to be equipped with die block and causes its volume to increase, and cooperation that is inconvenient and distribution box is assembled; And product structure design is simple, at the bottom of production cost, be applicable to very much the actual demand in market.
The present invention is described according to specific embodiment, but it will be understood by those skilled in the art that when not departing from the scope of the invention, can carry out various change and equivalent replacement.In addition, for adapting to the specific occasion of the technology of the present invention, can many amendments be carried out to the present invention and not depart from its protection range.Therefore, the present invention is not limited to specific embodiment disclosed herein, and comprises all embodiments dropping into claims.
Claims (2)
1. there is a circuit of miniature residual current circuit breaker for overvoltage protection, comprising: power supply inputs, and it is characterized in that, also comprises: power circuit, residual current and overvoltage dropout control circuit, residual current detection circuit and overvoltage detection circuit;
Wherein, described power circuit comprises piezo-resistance MYR, diode D3, diode D5, diode D6, diode D7, and release L1, before release L1 is positioned over piezo-resistance MYR; Residual current and overvoltage dropout control circuit comprise resistance R5, controllable silicon D2, electric capacity C2; Residual current detection circuit comprises sampling resistor R0, R1, voltage stabilizing didoe D1 and L-type filter circuit; Overvoltage detection circuit comprises resistance R3, R4 and bidirectional trigger diode D4.
2. the circuit of miniature residual current circuit breaker with overvoltage protection according to claim 1, is characterized in that, described L-type filter circuit comprises further: the resistance R2 be connected in series and electric capacity C1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510042683.1A CN104578003A (en) | 2015-01-28 | 2015-01-28 | Small residual current circuit breaker circuit having overvoltage protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510042683.1A CN104578003A (en) | 2015-01-28 | 2015-01-28 | Small residual current circuit breaker circuit having overvoltage protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104578003A true CN104578003A (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510042683.1A Pending CN104578003A (en) | 2015-01-28 | 2015-01-28 | Small residual current circuit breaker circuit having overvoltage protection function |
Country Status (1)
| Country | Link |
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| CN (1) | CN104578003A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10309031A (en) * | 1997-04-28 | 1998-11-17 | Tempearl Ind Co Ltd | Leak detector for both ac and dc |
| CN2512109Y (en) * | 2002-01-15 | 2002-09-18 | 董世荣 | Power circuit breaker with multifunctional protections |
| CN101316037A (en) * | 2007-05-29 | 2008-12-03 | 浙江正泰电器股份有限公司 | Aftercurrent action protector with self-diagnostic function |
| CN103366460A (en) * | 2013-07-15 | 2013-10-23 | 长城电器集团有限公司 | Circuit breaker for prepaid electric meter |
| CN103500983A (en) * | 2013-09-30 | 2014-01-08 | 长城电器集团有限公司 | Circuit of miniature electric leakage circuit breaker |
| CN204333936U (en) * | 2015-01-28 | 2015-05-13 | 长城电器集团有限公司 | There is the circuit of miniature residual current circuit breaker of overvoltage protection |
-
2015
- 2015-01-28 CN CN201510042683.1A patent/CN104578003A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10309031A (en) * | 1997-04-28 | 1998-11-17 | Tempearl Ind Co Ltd | Leak detector for both ac and dc |
| CN2512109Y (en) * | 2002-01-15 | 2002-09-18 | 董世荣 | Power circuit breaker with multifunctional protections |
| CN101316037A (en) * | 2007-05-29 | 2008-12-03 | 浙江正泰电器股份有限公司 | Aftercurrent action protector with self-diagnostic function |
| CN103366460A (en) * | 2013-07-15 | 2013-10-23 | 长城电器集团有限公司 | Circuit breaker for prepaid electric meter |
| CN103500983A (en) * | 2013-09-30 | 2014-01-08 | 长城电器集团有限公司 | Circuit of miniature electric leakage circuit breaker |
| CN204333936U (en) * | 2015-01-28 | 2015-05-13 | 长城电器集团有限公司 | There is the circuit of miniature residual current circuit breaker of overvoltage protection |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |