CN103490372A - Singlechip-based leakage protector - Google Patents
Singlechip-based leakage protector Download PDFInfo
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- CN103490372A CN103490372A CN201310474489.1A CN201310474489A CN103490372A CN 103490372 A CN103490372 A CN 103490372A CN 201310474489 A CN201310474489 A CN 201310474489A CN 103490372 A CN103490372 A CN 103490372A
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Abstract
The invention discloses a novel singlechip-based leakage protector. The singlechip-based leakage protector comprises an MSP430 singlechip, a zero sequence current transformer sampling module, an execution module, a power management module, an alarm module, a keyboard input module and a display module, wherein a zero sequence current transformer detects an electric grid leakage current and generates a leakage signal, and then transmits the leakage signal to the MSP430 singlechip; the MSP430 singlechip judges the received leakage signal, transmits the leakage signal to the display module, and drives the alarm module and the execution module; the execution module executes switch on/off action under the driving of the MSP430 singlechip; the alarm module gives an alarm under the driving of the MSP430 singlechip; the display module displays the received leakage signal; the keyboard input module sets an initial parameter value of the MSP430 singlechip; the power management module performs power supply management on the MSP430 singlechip.
Description
Technical field
The present invention relates to the earth leakage protective device technical field, especially relate to a kind of SCM Based earth leakage protective device.
Background technology
Earth leakage protective is one of basic protection of low-voltage distribution system, and it refers under rated condition, when a kind of safeguard measure of leakage current (residual current) energy automatic shutoff circuit while meeting or exceeding setting.It is used for the electric leakage in low-voltage distribution system and earth fault are carried out to security protection, the fire that prevents the accident of human electric shock and cause because of ground arc.Earth leakage protective device is development in recent years a kind of electric equipment that prevents electric accident, the protection person and device security faster, and the reliability consideration of carrying out earth leakage protective device is an important process of electrical apparatus industry.Along with the development of singlechip technology, single-chip microcomputer also is used widely in the electric device field, makes various electric equipments towards digitlization, intelligentized future development.Earth leakage protective device is important series of products of low-voltage electrical apparatus; at present earth leakage protective intellectuality is also needed to further investigate and inquires into technical in theory; to improve its fail safe, reliability, therefore be necessary to provide a kind of SCM Based earth leakage protective device.
Summary of the invention
For fail safe, the reliability that improves earth leakage protective device, the invention provides a kind of SCM Based earth leakage protective device.
For achieving the above object, the present invention adopts following technical scheme:
A kind of SCM Based electric leakage protector, comprise MSP430 single-chip microcomputer, zero sequence current mutual inductor sampling module, Executive Module, power management module, alarm module, keyboard input module and display module; Zero sequence current mutual inductor detection of grid leakage current also produces electric leakage signal, then electric leakage signal is sent to the MSP430 single-chip microcomputer; The MSP430 single-chip microcomputer judges processing to the electric leakage signal received, and electric leakage signal is sent to display module, and drives alarm module and Executive Module; Executive Module is carried out switch closure/disconnection action under the MSP430 Micro Controller Unit (MCU) driving; Alarm module is reported to the police under the MSP430 Micro Controller Unit (MCU) driving; Display module shows the electric leakage signal received; The keyboard input module is set MSP430 single-chip microcomputer initial parameter value; Electric power source pair of module MSP430 single-chip microcomputer carries out power supply management.
Further, after the MSP430 single-chip microcomputer is received electric leakage signal, will disconnect and drive signal to send to Executive Module and postponed timing, when timing time reaches delay time, send the closed signal that drives to executive circuit.
Further, the MSP430 single-chip microcomputer is provided with some leakage current gears, can switch according to different applied environments different leakage current gears, and the present invention is provided with 100mA, 300mA, tri-gears of 500mA, correspond respectively to different running environment, realized by software.
Beneficial effect: (1) the present invention is provided with some leakage current gears, can be corresponding to different applied environment, and can automatically regulate residual operating current, to meet the needs of different operating modes, greatly improved the reliability of Electrical Safety and power supply; (2) the present invention can Real-Time Monitoring and is shown the size of current leakage current value, for the user provides means that monitor the grid power leakage situation, the electric leakage of finding circuit as the user obviously increases, just can be when earth leakage protective device also move, check line fault and get rid of fault, greatly facilitating user's use; (3) the MSP430 single-chip microcomputer is provided with delay function, can automatic recovery of power supply.
The accompanying drawing explanation
Fig. 1 is principle schematic of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, a kind of SCM Based electric leakage protector provided by the invention, comprise MSP430 single-chip microcomputer, zero sequence current mutual inductor sampling module, Executive Module, power management module, alarm module, keyboard input module and display module.
Zero sequence current mutual inductor detection of grid leakage current also produces electric leakage signal, then electric leakage signal is sent to the MSP430 single-chip microcomputer.
The MSP430 single-chip microcomputer judges processing to the electric leakage signal received, and sends to display module to be shown electric leakage signal, and drives alarm module and Executive Module; After the MSP430 single-chip microcomputer is received electric leakage signal, to disconnect and drive signal to send to Executive Module and postponed timing, when timing time reaches delay time, send the closed signal that drives to executive circuit, Executive Module is carried out switch closure/disconnection action under the MSP430 Micro Controller Unit (MCU) driving; When leakage current overrate alarm module is reported to the police under the MSP430 Micro Controller Unit (MCU) driving; The MSP430 single-chip microcomputer is provided with some leakage current gears in addition, can switch according to different applied environments different leakage current gears, the present invention is provided with 100mA, 300mA, tri-gears of 500mA, can under complicated rural power grids and changeable climate condition, guarantee the reliability of power supply, be realized by software.
The keyboard input module is set MSP430 single-chip microcomputer initial parameter value; Electric power source pair of module MSP430 single-chip microcomputer carries out power supply management.
When zero sequence current mutual inductor detects grid power leakage, will produce electric leakage signal, and electric leakage signal is sent to the MSP430 single-chip microcomputer.After the MSP430 single-chip microcomputer is received electric leakage signal, send to display module to be shown electric leakage signal, and judge whether electric leakage signal surpasses the specified leakage current value of setting, if do not surpass, automatic recovery of power supply after operate time of protection; If overrate, will drive alarm to be reported to the police, and drive executive circuit to carry out cut-off switch
The MSP430 single-chip microcomputer is provided with 0.5s and two different operate time of protection gears of 0.3s in protector in addition, can be for manually being selected.And this protector also has the inverse time lag function, i.e. the degree that the time of delay of protection action and line current surpass specified operating value is inversely proportional to.When 2 times of leakage currents, when rated residual operating current and 5 times are between rated residual operating current, be 0.2s operate time.When leakage current is greater than 5 times of rated residual operating currents, be 0.15S operate time.When meeting above action request, this protector also has automatic recovery of power supply.After tripping operation, 30s carries out the auto-closing switching manipulation, if cut-off switch, by recloser and locking, resets protector after fixing a breakdown again again, to meet to greatest extent the requirement of power supply reliability.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. a SCM Based earth leakage protective device, is characterized in that: comprise MSP430 single-chip microcomputer, zero sequence current mutual inductor sampling module, Executive Module, power management module, alarm module, keyboard input module and display module;
Described zero sequence current mutual inductor detection of grid leakage current also produces electric leakage signal, then electric leakage signal is sent to the MSP430 single-chip microcomputer;
Described MSP430 single-chip microcomputer judges processing to the electric leakage signal received, and electric leakage signal is sent to display module, and drives alarm module and Executive Module;
Described Executive Module is carried out switch closure/disconnection action under the MSP430 Micro Controller Unit (MCU) driving;
Described alarm module is reported to the police under the MSP430 Micro Controller Unit (MCU) driving;
Described display module shows the electric leakage signal received;
Described keyboard input module is set MSP430 single-chip microcomputer initial parameter value;
Described electric power source pair of module MSP430 single-chip microcomputer carries out power supply management.
2. a kind of SCM Based earth leakage protective device according to claim 1; it is characterized in that: after described MSP430 single-chip microcomputer is received electric leakage signal; to disconnect and drive signal to send to Executive Module and postponed timing; when timing time reaches delay time, send the closed signal that drives to executive circuit.
3. a kind of SCM Based earth leakage protective device according to claim 1, it is characterized in that: described MSP430 single-chip microcomputer is provided with some leakage current gears.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310474489.1A CN103490372A (en) | 2013-10-12 | 2013-10-12 | Singlechip-based leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310474489.1A CN103490372A (en) | 2013-10-12 | 2013-10-12 | Singlechip-based leakage protector |
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| Publication Number | Publication Date |
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| CN103490372A true CN103490372A (en) | 2014-01-01 |
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| CN201310474489.1A Pending CN103490372A (en) | 2013-10-12 | 2013-10-12 | Singlechip-based leakage protector |
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| CN (1) | CN103490372A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004961A (en) * | 2015-08-07 | 2015-10-28 | 唐健发 | Electric leakage prompting system |
| CN110641308A (en) * | 2019-09-29 | 2020-01-03 | 重庆国翰能源发展有限公司 | Fill electric pile anticreep system |
| CN111719725A (en) * | 2020-05-18 | 2020-09-29 | 长江大学 | Building vibration suppression and energy recovery device based on electromagnetic damping |
-
2013
- 2013-10-12 CN CN201310474489.1A patent/CN103490372A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004961A (en) * | 2015-08-07 | 2015-10-28 | 唐健发 | Electric leakage prompting system |
| CN110641308A (en) * | 2019-09-29 | 2020-01-03 | 重庆国翰能源发展有限公司 | Fill electric pile anticreep system |
| CN111719725A (en) * | 2020-05-18 | 2020-09-29 | 长江大学 | Building vibration suppression and energy recovery device based on electromagnetic damping |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140101 |
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| WD01 | Invention patent application deemed withdrawn after publication |