CN201107835Y - Household electrical distribution box - Google Patents
Household electrical distribution box Download PDFInfo
- Publication number
- CN201107835Y CN201107835Y CNU2007201916114U CN200720191611U CN201107835Y CN 201107835 Y CN201107835 Y CN 201107835Y CN U2007201916114 U CNU2007201916114 U CN U2007201916114U CN 200720191611 U CN200720191611 U CN 200720191611U CN 201107835 Y CN201107835 Y CN 201107835Y
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- China
- Prior art keywords
- ground wire
- distribution box
- circuit
- transformer
- wire
- 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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- 230000005611 electricity Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract 2
- 230000006837 decompression Effects 0.000 abstract 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- Measurement Of Current Or Voltage (AREA)
Abstract
A family distribution box includes a potential difference detection device and a current detection device. The former consists of a transformer decompression circuit and a time-base circuit. A transformer primary coil bridges over between the zero line and the ground wire of a power. The time-base circuit is connected with the I/O input end of a microcontroller. The later consists of a current transformer and a switch tube circuit. The primary coil of the current transformer bridges over between the fire wire and the zero line of the power. The ground wire penetrates through the primary coil of the current transformer. The switch tube circuit is connected with the I/O input end of the microcontroller. The I/O input end of the microcontroller is connected with switch tubes and relays. The normally closed contacts of the relays are respectively connected with the input and the output ends of the fire wire and the ground wire. The family distribution box has the beneficial effects of cutting off the fire wire and the ground wire when the ground wire is electrified to ensure the human body safety of the power usage in family and cutting off power supply circuits in a way of time sharing when detecting the electricity stealing of the fire wire and the ground wire. As the attachment of a single phase kilowatt-hour meter, the family distribution box can effectively prevent the electricity sheft.
Description
Technical field
The utility model relates to a kind of family distribution box, particularly a kind of family's distribution box with potential difference detecting device and current sensing means.
Background technology
The utility model is before the applying date, and prior art family distribution box does not have potential difference detecting device and current sensing means.
Summary of the invention
The purpose of this utility model provides a kind of family's distribution box with potential difference detecting device and current sensing means.
The technical scheme that its technical problem that solves the utility model adopts is: the utility model comprises potential difference detecting device and current sensing means, potential difference detecting device is connected with the single-chip processor i/o input with current sensing means, and the single-chip processor i/o output is connected with the switch executive circuit.Potential difference detecting device is made up of transformer reduction voltage circuit and time-base circuit, and the transformer cross-over connection is between the power supply Zero-liue, and time-base circuit is connected with the single-chip processor i/o input.Current sensing means is the stealing current sensing means, form by current transformer and switching circuit, the primary coil cross-over connection of current transformer is between power supply fire zero line, and ground wire penetrates the primary coil of current transformer, and switching circuit is connected with the single-chip processor i/o input.The switch executive circuit is made up of switching tube and relay, is connected with the single-chip processor i/o output, and the normally-closed contact of relay connects live wire and ground wire in-out end respectively.
The beneficial effects of the utility model are to have overcome the defective that existing family distribution box does not have an earth wire charged testing device and an anti-fiery ground electricity filching device, cut off live wire and ground wire when ground wire electrification, guarantee the personal safety of household electricity.When detecting a fiery ground stealing, power supply circuits are cut off in timesharing, restore electricity voluntarily after removing electricity filching device, can prevent stealing effectively as the attachment device of single-phase watt-hour meter.
Description of drawings
The utility model is described in further detail below by accompanying drawing.
Fig. 1 is a circuit structure block diagram of the present utility model.
Embodiment
Consult Fig. 1.Single-chip microcomputer adopts the 8-bit microcontroller PIC12C508 of U.S. MICROCHIP company among the figure.The utility model potential difference detecting device and current sensing means, potential difference detecting device is connected with single-chip processor i/o input I/O (1), I/O (2) respectively with current sensing means, and single-chip processor i/o output I/O (3), I/O (4) are connected with the switch executive circuit.Potential difference detecting device is made up of transformer T reduction voltage circuit and time-base circuit NE555, the cross-over connection of transformer T primary coil is between power supply Zero-liue NE, transformer T secondary coil is connected with rectification circuit D1-D4, rectification circuit D1-D4 is connected with time-base circuit NE555, and time-base circuit NE555 is connected with single-chip processor i/o input I/O (1).Current sensing means is the stealing current sensing means, form by current transformer A and switching tube G1, the primary coil cross-over connection of current transformer A is between power supply fire zero line LN, ground wire penetrates the primary coil of current transformer A, the secondary coil of current transformer A is connected with rectification circuit D5-D8, rectification circuit D5-D8 is connected with switching tube G1, and switching tube G1 is connected with single-chip processor i/o input I/O (2).The switch executive circuit is made up of switching tube G2, G3 and relay J 1, J2, and switching tube G2, G3 are connected with single-chip processor i/o output I/O (3), I/O (4), and the normally-closed contact of relay J 1, J2 connects live wire and ground wire in-out end respectively.
Claims (1)
1, a kind of family distribution box, comprise potential difference detecting device and current sensing means, it is characterized in that potential difference detecting device is made up of transformer reduction voltage circuit and time-base circuit, the transformer cross-over connection is between the power supply Zero-liue, and time-base circuit is connected with the single-chip processor i/o input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201916114U CN201107835Y (en) | 2007-11-12 | 2007-11-12 | Household electrical distribution box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201916114U CN201107835Y (en) | 2007-11-12 | 2007-11-12 | Household electrical distribution box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201107835Y true CN201107835Y (en) | 2008-08-27 |
Family
ID=39959647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201916114U Expired - Fee Related CN201107835Y (en) | 2007-11-12 | 2007-11-12 | Household electrical distribution box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201107835Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401213A (en) * | 2013-08-22 | 2013-11-20 | 国家电网公司 | Special electricity larceny prevention device of induction lamp illuminating system |
-
2007
- 2007-11-12 CN CNU2007201916114U patent/CN201107835Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401213A (en) * | 2013-08-22 | 2013-11-20 | 国家电网公司 | Special electricity larceny prevention device of induction lamp illuminating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080827 Termination date: 20091214 |