CN215681772U - System with electric leakage detection and control functions - Google Patents
System with electric leakage detection and control functions Download PDFInfo
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- CN215681772U CN215681772U CN202120322272.9U CN202120322272U CN215681772U CN 215681772 U CN215681772 U CN 215681772U CN 202120322272 U CN202120322272 U CN 202120322272U CN 215681772 U CN215681772 U CN 215681772U
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Abstract
The utility model discloses a system with electric leakage detection and control functions, which comprises a main singlechip, a relay photoelectric isolation control circuit, a multi-path relay control circuit, a relay, a power supply circuit, an electric leakage detection zero sequence mutual inductor pre-stage circuit and an electric leakage current detection metering circuit, wherein the main singlechip is electrically connected with the relay photoelectric isolation control circuit, the relay photoelectric isolation control circuit is electrically connected with the multi-path relay control circuit, the relay is electrically connected with the multi-path relay control circuit, the power supply circuit is electrically connected with the main singlechip, the electric leakage detection zero sequence mutual inductor pre-stage circuit is electrically connected with the electric leakage current detection metering circuit, and the electric leakage current detection metering circuit is electrically connected with the main singlechip. The utility model belongs to the technical field of power supply systems, and particularly relates to a system with electric leakage detection and control functions.
Description
Technical Field
The utility model belongs to the technical field of power supply systems, and particularly relates to a system with electric leakage detection and control functions.
Background
Along with the continuous improvement of living standard of people, the power input end of more and more multi-purpose electrical apparatus can be attached with a leakage protection device to ensure the safety of power consumption. For a general leakage protection device, it is necessary to provide protection for the leakage of the load at the output terminal, and once the load has a leakage condition, the leakage protection device can detect that the current-carrying loop has residual current and interrupt the electrical connection between the power supply terminal and the load terminal.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a system with electric leakage detection and control functions.
In order to realize the functions, the technical scheme adopted by the utility model is as follows: a system with electric leakage detection and control functions comprises a main singlechip, a relay photoelectric isolation control circuit, a multi-path relay control circuit, a relay, a power supply circuit, an electric leakage detection zero sequence mutual inductor pre-stage circuit and an electric leakage current detection metering circuit, wherein the main singlechip is electrically connected with the relay photoelectric isolation control circuit, the relay photoelectric isolation control circuit is electrically connected with the multi-path relay control circuit, the relay is electrically connected with the multi-path relay control circuit, the power supply circuit is electrically connected with the main singlechip, the electric leakage detection zero sequence mutual inductor pre-stage circuit is electrically connected with the electric leakage current detection metering circuit, and the electric leakage current detection metering circuit is electrically connected with the main singlechip; the leakage detection is that zero line and live line of zero sequence mutual inductor are penetrated simultaneously, and normal current flows from live line to zero line, and the current of two lines is equal at this moment, and offsets each other. If the leakage happens, the current flows to the ground from the live wire, the residual current is generated because the current does not pass through the zero line, the mutual inductor outputs the residual current to the microprocessor through the secondary winding of the mutual inductor, the data after the operation and the amplification of the terminal is sent to the microprocessor for processing, and the microprocessor reads the user-defined leakage protection threshold value after sampling and judges whether the residual current exceeds the set value, and then the relay of the control contactor is disconnected to output, so that the leakage fault is protected to cause potential safety hazards.
Further, the main single chip microcomputer adopts an STM32F103ZET6 chip.
Further, the multi-way relay control circuit adopts an ULN2803LW chip.
Further, the leakage current detection metering circuit adopts an ATT7022E chip.
The utility model adopts the structure to obtain the following beneficial effects: the system with the functions of electric leakage detection and control is reasonable in design, electric leakage detection is realized by simultaneously penetrating zero line and live line through a zero sequence transformer, normal current flows from the live line to the zero line, and the currents of the two lines are equal and mutually offset. If the leakage happens, the current flows to the ground from the live wire, the residual current is generated because the current does not pass through the zero line, the mutual inductor outputs the residual current to the microprocessor through the secondary winding of the mutual inductor, the data after the operation and the amplification of the terminal is sent to the microprocessor for processing, and the microprocessor reads the user-defined leakage protection threshold value after sampling and judges whether the residual current exceeds the set value, and then the relay of the control contactor is disconnected to output, so that the leakage fault is protected to cause potential safety hazards.
Drawings
Fig. 1 is a circuit diagram of a system with leakage detection and control functions according to the present invention.
The device comprises a main singlechip 1, a relay photoelectric isolation control circuit 2, a multi-path relay control circuit 3, a relay 4, a relay 5, a power supply circuit 6, a leakage detection zero sequence mutual inductor pre-stage circuit 7 and a leakage current detection metering circuit.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the system with leakage detection and control functions of the present invention includes a main singlechip 1, a relay optoelectronic isolation control circuit 2, a multi-way relay control circuit 3, a relay 4, a power supply circuit 5, a leakage detection zero-sequence transformer pre-stage circuit 6 and a leakage current detection metering circuit 7, wherein the main singlechip 1 is electrically connected to the relay optoelectronic isolation control circuit 2, the relay optoelectronic isolation control circuit 2 is electrically connected to the multi-way relay control circuit 3, the relay 4 is electrically connected to the multi-way relay control circuit 3, the power supply circuit 5 is electrically connected to the main singlechip 1, the leakage detection zero-sequence transformer pre-stage circuit 6 is electrically connected to the leakage current detection metering circuit 7, and the leakage current detection metering circuit 7 is electrically connected to the main singlechip 1.
The main single chip microcomputer 1 employs an STM32F103ZET6 chip.
The multi-way relay control circuit 3 adopts a ULN2803LW chip.
The leakage current detection metering circuit 7 adopts an ATT7022E chip.
As shown in fig. 1, the leakage detection is performed by passing through zero line and live line of the zero sequence transformer at the same time, and the normal current flows from the live line to the zero line, and at this time, the currents of the two lines are equal and cancel each other. If the leakage happens, the current flows to the ground from the live wire, and the residual current is generated because the residual current does not pass through the zero line, the mutual inductor outputs the residual current to the main singlechip through the secondary winding of the mutual inductor, the data after the operation and the amplification of the terminal is sent to the main singlechip for processing, and the main singlechip samples and then reads the user-defined leakage protection threshold value to judge whether the residual current exceeds the set relay disconnection output of the disconnection control contactor, so that the leakage fault is protected to cause potential safety hazard.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (4)
1. The utility model provides a take system of electric leakage detection and control function which characterized in that: including main singlechip, relay photoelectric isolation control circuit, multi-channel relay control circuit, relay, supply circuit, leakage detection zero sequence mutual-inductor preceding stage circuit and leakage current detection metering circuit, main singlechip links to each other with relay photoelectric isolation control circuit electricity, relay photoelectric isolation control circuit links to each other with multi-channel relay control chip electricity, the relay links to each other with multi-channel relay control chip electricity, supply circuit links to each other with main singlechip electricity, leakage detection zero sequence mutual-inductor preceding stage circuit and leakage current detection metering circuit are continuous, leakage current detection metering circuit links to each other with main singlechip electricity.
2. The system with electric leakage detection and control functions according to claim 1, wherein: the main single chip microcomputer adopts STM32F103ZET6 chips.
3. The system with electric leakage detection and control functions according to claim 1, wherein: the multi-way relay control circuit adopts a ULN2803LW chip.
4. The system with electric leakage detection and control functions according to claim 1, wherein: the leakage current detection metering circuit adopts an ATT7022E chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120322272.9U CN215681772U (en) | 2021-02-04 | 2021-02-04 | System with electric leakage detection and control functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120322272.9U CN215681772U (en) | 2021-02-04 | 2021-02-04 | System with electric leakage detection and control functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215681772U true CN215681772U (en) | 2022-01-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120322272.9U Active CN215681772U (en) | 2021-02-04 | 2021-02-04 | System with electric leakage detection and control functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215681772U (en) |
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2021
- 2021-02-04 CN CN202120322272.9U patent/CN215681772U/en active Active
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