CN2582241Y - Protective device for leakage and overvoltage - Google Patents
Protective device for leakage and overvoltage Download PDFInfo
- Publication number
- CN2582241Y CN2582241Y CN 02255236 CN02255236U CN2582241Y CN 2582241 Y CN2582241 Y CN 2582241Y CN 02255236 CN02255236 CN 02255236 CN 02255236 U CN02255236 U CN 02255236U CN 2582241 Y CN2582241 Y CN 2582241Y
- Authority
- CN
- China
- Prior art keywords
- resistance
- overvoltage
- electric leakage
- circuit
- piezo
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a protective device for electric leakage and overvoltage, which is composed of an insulating casing 1 and an inner circuit board 2, wherein, the insulating casing 1 is provided with a power supply tripping switch K< 1 >3, an experiment push-button switch K< 2 >4, an input end wire connection base 5, and an output end wire connection base 6, one side of the experiment push-button switch K< 2 >4 is provided with an overvoltage automatic switching-on device 7, and a connector of the overvoltage automatic switching-on device 7 is connected in parallel with wire connection ends at both ends of an electric leakage experiment circuit. The protective device for electric leakage and overvoltage has an electric leakage protection function, and has an overvoltage protection function. The utility model has the advantages of stable performance, high sensitivity, simple structure, and low cost, accidents caused by erroneous connection with a high voltage power supply can be effectively prevented, and the utility model can be widely used for safety protection of domestic electric appliances.
Description
Technical field
The utility model relates to a kind of earth leakage protective device, and specifically a kind of electric leakage overvoltage protector is applicable to the household electrical appliance safeguard protection.
Background technology
Most of household electrical appliance, because the user often contacts shell, when electrical equipment during because of certain reason generation body leakage, regular meeting causes danger, and therefore for safety that guarantees household electrical appliance and the appearance that prevents accident, earth leakage protective device often is installed on household electrical appliance.The earth leakage protective device that uses is made of insulation crust and internal circuit board mostly at present, and insulation crust is provided with power supply dropout switch, experiment push switch, input junction block, output junction block; Internal circuit board is provided with zero-sequence mutual inductance coil HQ, control coil L
1, piezo-resistance RV
1, resistance R
1, R
2, capacitor C, diode D
1, controllable silicon SCR and rectifier diode D
2, D
3, D
4, D
5Constitute, they constitute control circuit respectively and (comprise controllable silicon SCR, control coil L
1Composition), stabilizing circuit (comprises resistance R
1, capacitor C, diode D
1Composition), pressure limiting circuit (comprises piezo-resistance RV
1Composition), rectification circuit (comprises D
2, D
3, D
4, D
5Composition), the electric leakage experimental circuit (comprises resistance R
2, experiment push switch K
2Form).Under normal circumstances, after power supply inserts input, and power supply dropout K switch
1Be under the on-state, electric current is imported from output, electrical work; When electrical leakage, form current deviation between the two-phase electricity, in zero-sequence mutual inductance coil HQ, produce induced current, trigger the controllable silicon SCR conducting, control coil L
1There is electric current to pass through, makes power supply dropout K switch by adhesive
1Disconnect, play the protective effect to electrical equipment, the shortcoming of this earth leakage protective device is: when the input circuit overvoltage, can not shield to electrical equipment, and sensitiveness, less stable.
Summary of the invention
The purpose of this utility model is to provide a kind of can not only play the earth leakage protective effect; can also be to the thunderbolt overvoltage; overvoltage when particularly high voltage source is gone in misconnection all can shield, and stable performance, sensitiveness is strong, simple in structure, cost is low electric leakage overvoltage protector.
For reaching above purpose, the technical scheme that the utility model adopted is: this electric leakage overvoltage protector, constitute by insulation crust and internal circuit board, and insulation crust is provided with power supply dropout K switch
1, experiment push switch K
2, input junction block, output junction block; On internal circuit board, be provided with zero-sequence mutual inductance coil HQ, control coil L
1, piezo-resistance RV
1, resistance R
1, R
2, capacitor C, diode D
1, controllable silicon SCR and rectifier diode D
2, D
3, D
4, D
5Constitute, they constitute control circuit respectively and (comprise controllable silicon SCR, control coil L
1Composition), stabilizing circuit (comprises resistance R
1, capacitor C, diode D
1Composition), pressure limiting circuit (comprises piezo-resistance RV
1Composition), rectification circuit (comprises diode D
2, D
3, D
4, D
5Composition), the electric leakage experimental circuit (comprises resistance R
2, experiment push switch K
2Form), at experiment push switch K
2One side is established the automatic maker of overvoltage, and the automatic maker of overvoltage is by piezo-resistance RV
2And resistance R
3Be composed in series, and be solidificated in the automatic maker housing of overvoltage, its joint is in parallel with the terminals at electric leakage experimental circuit two ends.The utility model is also implemented by following measure: the piezo-resistance RV of the automatic maker of described overvoltage
2Voltage be 390V, and limit the following akinesia of alternating current 285V, 350V is above must to move resistance R
3Resistance be 150/1W.When the 380V high-tension electricity is gone in misconnection, piezo-resistance RV
2And resistance R
3Have electric current to pass through, zero-sequence mutual inductance coil HQ produces electric current, triggers the controllable silicon SCR conducting, control coil L
2There is electric current to pass through, thereby makes power supply dropout K switch
1Disconnect, realized overvoltage protection household electrical appliance.
The beneficial effects of the utility model are: compare with existing household electrical appliance earth leakage protective device; can not only play the earth leakage protective effect; and when overvoltage, also can shield; and stable performance; highly sensitive, simple in structure, cost is low, has effectively prevented the generation of accident when high voltage source is gone in misconnection.
Description of drawings
Fig. 1 is the utility model structure office cross-sectional schematic.
Fig. 2 is the utility model circuit theory diagrams.
Embodiment
Make the utility model with reference to accompanying drawing 1,2.This overvoltage protector that leaks electricity is made of insulation crust 1 and internal circuit board 2, is provided with power supply dropout K switch on insulation crust 1
13, experiment push switch K
24, input junction block 5, output junction block 6; On internal circuit board 2, be provided with zero-sequence mutual inductance coil HQ, control coil L
1, piezo-resistance RV
1, resistance R
1, R
2, capacitor C, diode D
1, controllable silicon SCR and rectifier diode D
2, D
3, D
4, D
5Constitute, they constitute control circuit respectively and (comprise controllable silicon SCR, control coil L
1Composition), stabilizing circuit (comprises resistance R
1, capacitor C, diode D
1Composition), pressure limiting circuit (comprises piezo-resistance RV
1Composition), rectification circuit (comprises diode D
2, D
3, D
4, D
5Composition), the electric leakage experimental circuit (comprises resistance R
2, experiment push switch K
2Form), at experiment push switch K
24 one sides are established the automatic maker 7 of overvoltage, and the automatic maker 7 of overvoltage is by piezo-resistance RV
2And resistance R
3Be composed in series, and be solidificated in the housing of the automatic maker 7 of overvoltage, its joint is in parallel with the terminals at electric leakage experimental circuit two ends.The piezo-resistance RV of the automatic maker 7 of overvoltage
2Voltage be 390V, and limit the following akinesia of alternating current 285V, 350V is above must to move resistance R
3Resistance be 150/1W.
Claims (2)
1, a kind of electric leakage overvoltage protector is made of insulation crust (1) and internal circuit board (2), is provided with power supply dropout K switch on insulation crust (1)
1(3), experiment push switch K
2(4), input junction block (5), output junction block (6); On internal circuit board (2), be provided with zero-sequence mutual inductance coil HQ, control coil L
1, piezo-resistance RV
1, resistance R
1, R
2, capacitor C, diode D
1, controllable silicon SCR and rectifier diode D
2, D
3, D
4, D
5Constitute, they constitute control circuit respectively and (comprise controllable silicon SCR, control coil L
1Composition), stabilizing circuit (comprises resistance R
1, capacitor C, diode D
1Composition), pressure limiting circuit (comprises piezo-resistance RV
1Composition), rectification circuit (comprises diode D
2, D
3, D
4, D
5Composition), the electric leakage experimental circuit (comprises resistance R
2, experiment push switch K
2Form), it is characterized in that at experiment push switch K
2(4) one sides are established the automatic maker of overvoltage (7), and the automatic maker of overvoltage (7) is by piezo-resistance RV
2And resistance R
3Be composed in series, and be solidificated in the housing of the automatic maker of overvoltage (7), its joint is in parallel with the terminals at electric leakage experimental circuit two ends.
2, electric leakage overvoltage protector according to claim 1 is characterized in that the piezo-resistance RV of the automatic maker of overvoltage (7)
2Voltage be 390V, and limit the following akinesia of alternating current 285V, 350V is above must to move resistance R
3Resistance be 150/1W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02255236 CN2582241Y (en) | 2002-11-13 | 2002-11-13 | Protective device for leakage and overvoltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02255236 CN2582241Y (en) | 2002-11-13 | 2002-11-13 | Protective device for leakage and overvoltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2582241Y true CN2582241Y (en) | 2003-10-22 |
Family
ID=33723769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02255236 Expired - Fee Related CN2582241Y (en) | 2002-11-13 | 2002-11-13 | Protective device for leakage and overvoltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2582241Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373727C (en) * | 2004-08-20 | 2008-03-05 | 四川康姆逊电磁防护有限责任公司 | Improved overheat overvoltage protection machine |
-
2002
- 2002-11-13 CN CN 02255236 patent/CN2582241Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373727C (en) * | 2004-08-20 | 2008-03-05 | 四川康姆逊电磁防护有限责任公司 | Improved overheat overvoltage protection machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |