CN204333902U - A kind of detection of electrical leakage and protective circuit - Google Patents
A kind of detection of electrical leakage and protective circuit Download PDFInfo
- Publication number
- CN204333902U CN204333902U CN201520059428.3U CN201520059428U CN204333902U CN 204333902 U CN204333902 U CN 204333902U CN 201520059428 U CN201520059428 U CN 201520059428U CN 204333902 U CN204333902 U CN 204333902U
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- resistance
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Abstract
The utility model relates to a kind of detection of electrical leakage and protective circuit, comprising: power supply inputs, and it is characterized in that, described detection of electrical leakage and protective circuit also comprise: power circuit, electric leakage dropout control circuit, electric-leakage detection circuit; Wherein: power circuit comprises piezo-resistance MYR, diode D4, diode D5, diode D6, diode D7, release L1, before release L1 is positioned over piezo-resistance MYR; Electric leakage dropout control circuit comprises resistance R2, resistance R4, resistance R5, resistance R6, resistance R7, controllable silicon D2, controllable silicon D3, electric capacity C3; Electric-leakage detection circuit comprises: the sampling resistor R1 be connected in parallel, voltage stabilizing didoe D1, π type filter circuit.Antijamming capability is strong, guarantees that electric leakage signal is reliable and stable; Simplicity of design, anti-electromagnetic compatibility characteristic are high, and cost is low simultaneously, are applicable to batch production.
Description
Technical field
The utility model relates to detection of electrical leakage and resist technology field, more particularly, relates to a kind of detection of electrical leakage and protective circuit.
Background technology
Generally electric leakage special chip (also claiming integrated circuit) or shunt opening circuit realiration earth leakage protective is adopted in traditional leakage protection circuit.Because integrated circuit cost is high, circuit relative complex, be used for requiring higher electricity consumption place, conventional still based on shunt opening circuit.Because shunt opening circuit is difficult to reliable and stable realization batch production 30mA earth leakage protective shelves, conventional processing method adopts the integrated circuit of 30mA shelves to replace shunt opening circuit; After release is placed on piezo-resistance in addition, cause the poor anti jamming capability of whole circuit.
Therefore, prior art urgently has greatly improved.
Summary of the invention
The technical problems to be solved in the utility model is, for the above-mentioned defect of prior art, a kind of detection of electrical leakage and protective circuit are provided, comprise: comprising: power supply inputs, it is characterized in that, described detection of electrical leakage and protective circuit also comprise: power circuit, electric leakage dropout control circuit, electric-leakage detection circuit; Wherein: power circuit comprises piezo-resistance MYR, diode D4, diode D5, diode D6, diode D7, release L1, before release L1 is positioned over piezo-resistance MYR; Electric leakage dropout control circuit comprises resistance R2, resistance R4, resistance R5, resistance R6, resistance R7, controllable silicon D2, controllable silicon D3, electric capacity C3; Electric-leakage detection circuit comprises: the sampling resistor R1 be connected in parallel, voltage stabilizing didoe D1, π type filter circuit.
In a kind of detection of electrical leakage described in the utility model and protective circuit, described π type filter circuit comprises further: comprise resistance R3, electric capacity C1, C2 and diode D5.
Implement a kind of detection of electrical leakage of the present utility model and protective circuit, there is following beneficial effect: detection of electrical leakage of the present invention and protective circuit: before power circuit tripping coil L1 is positioned over piezo-resistance MYR, protect piezo-resistance MYR and controllable silicon D2, D3, improve the antijamming capability of circuit; Electric-leakage detection circuit adopts protection diode D5 and π type filter circuit design, guarantees that electric leakage signal is more reliable and more stable; Effective coupling of electric leakage dropout control circuit and electric-leakage detection circuit guarantees the realization batch production that 30mA earth leakage protective shelves are more reliable and stable; Simple, the anti-electromagnetic compatibility characteristic of whole circuit design is high, is very applicable to batch production at the bottom of cost simultaneously.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the circuit theory diagrams of the first embodiment of the utility model detection of electrical leakage and protective circuit;
Fig. 2 is traditional detection of electrical leakage and protective circuit schematic diagram.
Embodiment
Referring to Fig. 1, is the circuit theory diagrams of the first embodiment of a kind of detection of electrical leakage of the utility model and protective circuit.As shown in Figure 1, in a kind of detection of electrical leakage provided in the utility model first embodiment and protective circuit, at least comprise, power supply inputs, it is characterized in that, described detection of electrical leakage and protective circuit also comprise: power circuit, electric leakage dropout control circuit, electric-leakage detection circuit; Wherein: power circuit comprises piezo-resistance MYR, diode D4, diode D5, diode D6, diode D7, release L1, before release L1 is positioned over piezo-resistance MYR; Electric leakage dropout control circuit comprises resistance R2, resistance R4, resistance R5, resistance R6, resistance R7, controllable silicon D2, controllable silicon D3, electric capacity C3; Electric-leakage detection circuit comprises: the sampling resistor R1 be connected in parallel, voltage stabilizing didoe D1, π type filter circuit.
In the detection of electrical leakage that the utility model provides and protective circuit, described π type filter circuit comprises further: comprise resistance R3, electric capacity C1, C2 and diode D5.
Incorporated by reference to consulting Fig. 2, be traditional detection of electrical leakage and protective circuit schematic diagram.Electric leakage special chip is adopted also to claim integrated circuit or shunt opening circuit realiration earth leakage protective.Because integrated circuit cost is high, circuit relative complex, be used for requiring higher electricity consumption place, conventional still based on shunt opening circuit.Because shunt opening circuit is difficult to reliable and stable realization batch production 30mA earth leakage protective shelves, conventional processing method adopts the integrated circuit of 30mA shelves to replace shunt opening circuit; After release is placed on piezo-resistance in addition, cause the poor anti jamming capability of whole circuit.
The utility model is by the design of above first embodiment, its beneficial effect is: detection of electrical leakage and protective circuit, before power circuit tripping coil L1 is positioned over piezo-resistance MYR, protects piezo-resistance MYR and controllable silicon D2, D3, improve the antijamming capability of circuit; Electric-leakage detection circuit adopts protection diode D5 and π type filter circuit design, guarantees that electric leakage signal is more reliable and more stable; Effective coupling of electric leakage dropout control circuit and electric-leakage detection circuit guarantees the realization batch production that 30mA earth leakage protective shelves are more reliable and stable; Simple, the anti-electromagnetic compatibility characteristic of whole circuit design is high, is very applicable to batch production at the bottom of cost simultaneously.
The utility model is described according to specific embodiment, but it will be understood by those skilled in the art that when not departing from the utility model scope, can carry out various change and equivalent replacement.In addition, for adapting to the specific occasion of the utility model technology, can many amendments be carried out to the utility model and not depart from its protection range.Therefore, the utility model is not limited to specific embodiment disclosed herein, and comprises all embodiments dropping into claims.
Claims (2)
1. detection of electrical leakage and a protective circuit, comprising: power supply inputs, and it is characterized in that, described detection of electrical leakage and protective circuit also comprise: power circuit, electric leakage dropout control circuit, electric-leakage detection circuit; Wherein: power circuit comprises piezo-resistance MYR, diode D4, diode D5, diode D6, diode D7, release L1, before release L1 is positioned over piezo-resistance MYR; Electric leakage dropout control circuit comprises resistance R2, resistance R4, resistance R5, resistance R6, resistance R7, controllable silicon D2, controllable silicon D3, electric capacity C3; Electric-leakage detection circuit comprises: the sampling resistor R1 be connected in parallel, voltage stabilizing didoe D1, π type filter circuit.
2. detection of electrical leakage according to claim 1 and protective circuit, is characterized in that, described π type filter circuit comprises further: comprise resistance R3, electric capacity C1, C2 and diode D5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520059428.3U CN204333902U (en) | 2015-01-28 | 2015-01-28 | A kind of detection of electrical leakage and protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520059428.3U CN204333902U (en) | 2015-01-28 | 2015-01-28 | A kind of detection of electrical leakage and protective circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204333902U true CN204333902U (en) | 2015-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520059428.3U Expired - Fee Related CN204333902U (en) | 2015-01-28 | 2015-01-28 | A kind of detection of electrical leakage and protective circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204333902U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577958A (en) * | 2015-01-28 | 2015-04-29 | 长城电器集团有限公司 | Electric leakage detection and protection circuit |
-
2015
- 2015-01-28 CN CN201520059428.3U patent/CN204333902U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577958A (en) * | 2015-01-28 | 2015-04-29 | 长城电器集团有限公司 | Electric leakage detection and protection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171226 Address after: 2-1 No. 325000 Zhejiang city of Wenzhou province Yueqing North white elephant white town road (South) Patentee after: Zhejiang Kai FA Electric Co., Ltd. Address before: 325000, No. 2-1, white elephant Avenue, North white elephant Town, Wenzhou, Zhejiang, Yueqing Patentee before: CNC Electric Group Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 325000 No. 2-1 Baixiang Avenue, Beibeixiang Town, Yueqing City, Zhejiang Province (South Building) Patentee after: Great Wall Electrical Appliance Group Zhejiang Technology Co., Ltd. Address before: 325000 white elephant road 2-1, North white elephant Town, Yueqing, Wenzhou, Zhejiang (South Tower) Patentee before: Zhejiang Kai FA Electric Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20210128 |