CN203949950U - A kind of ammeter with earth leakage detection functions - Google Patents
A kind of ammeter with earth leakage detection functions Download PDFInfo
- Publication number
- CN203949950U CN203949950U CN201420253387.7U CN201420253387U CN203949950U CN 203949950 U CN203949950 U CN 203949950U CN 201420253387 U CN201420253387 U CN 201420253387U CN 203949950 U CN203949950 U CN 203949950U
- Authority
- CN
- China
- Prior art keywords
- ammeter
- leakage
- microprocessor
- current detecting
- detecting chip
- 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
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 206010047924 Wheezing Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001256 tonic effect Effects 0.000 description 1
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model provides a kind of ammeter with earth leakage detection functions, comprises ammeter body, it is characterized in that: current detecting chip, microprocessor and alarm and relay have been installed on ammeter; Current detecting chip, alarm and relay are connected with microprocessor respectively; Current detecting chip internal is a leakage protection circuit.When the utility model completes Electro-metering task; leakage current in Real-Time Monitoring circuit; and send signal to microprocessor; make the timely action protection power circuit of ammeter and give a warning to user; expanded ammeter function; promote the security of ammeter, promoted the integrated and intelligent of ammeter.
Description
Technical field
The utility model belongs to instrument field, relates to a kind of ammeter, specifically a kind of ammeter with earth leakage detection functions.
Background technology
The anticreep of home circuit is a wheezy topic, and the hair tonic of self-love enlightening understands that electric light rises, and Electrical Safety problem has just been come into our life thereupon.Therefore along with the development of scientific and technological level, increasing high-power household electrical appliance have entered our family, have also brought electricity consumption hidden danger more, the security of the lives and property that the casualty accidents such as the fire causing because of household electrical appliance electric leakage, electric shock are threatening us invariably.
Nowadays, increasing anti-creeper appears on the market, and pandemic is in the market that leakage switch is installed in circuit, and tripping operation at once after leakage switch detects leakage current, to protect user's personal safety.But this leakage switch is the leakage protection of realizing by additional earth leakage protective device on the basis of regular tap, and that earth leakage protective device has sensitivity is not high, the shortcomings such as poor anti jamming capability.
Utility model content
The purpose of this utility model is to provide a kind of ammeter with earth leakage detection functions, and the leakage current in real-time detection circuit is avoided electricity consumption hidden danger.
The technical scheme that the utility model adopted is to achieve these goals: a kind of ammeter with earth leakage detection functions, comprise ammeter body, it is characterized in that: current detecting chip is installed on ammeter, microprocessor and alarm and relay, described current detecting chip, alarm is connected with microprocessor respectively with relay, described current detecting chip internal is a leakage protection circuit, described leakage protection circuit is by differential amplifier, latch and voltage adjuster form, wherein 2 of differential amplifier input ends are connected to secondary for detection of leakage current, current signal is amplified by differential amplifier and by external capacitor integration, be connected to the input end of latch, the output terminal of described latch is connected with described microprocessor.The output of described latch has earth leakage protection characteristic fast; before input voltage is lower than setting, latch remains low always, when leakage current surpasses setting; output uprises, and microprocessor is brought in and judged whether that electric leakage situation occurs by the output of detection latches.
The beneficial effects of the utility model are: when completing Electro-metering task; leakage current in Real-Time Monitoring circuit; and send signal to microprocessor; make the timely action protection power circuit of ammeter and give a warning to user; expanded ammeter function; promote the security of ammeter, promoted the integrated and intelligent of ammeter.
Accompanying drawing explanation
Fig. 1 is circuit board schematic diagram of the present utility model.
Fig. 2 is leakage protection circuit schematic diagram in the utility model.
In figure 1, microprocessor; 2, current detecting chip; 3, alarm; 4, relay.
Embodiment
With an ammeter for earth leakage detection functions, as shown in Figure 1, comprise ammeter body, it is characterized in that: current detecting chip, microprocessor and alarm and relay have been installed on ammeter; Current detecting chip, alarm and relay are connected with microprocessor respectively; Current detecting chip internal is a leakage protection circuit, as shown in Figure 2, the preferred LM54123 of detection of electrical leakage chip, leakage protection circuit is by differential amplifier, latch and voltage adjuster form, wherein 2 of differential amplifier input end pins 1 and pin 2 are connected to secondary for detection of leakage current, and pin 1 is reference voltage input terminal, and pin 2 is differential amplifier input end; Current signal is amplified and exports by pin 4 by differential amplifier, and by external capacitor C1 integration, is connected to the input end pin 5 of latch, and pin 7 is linked in microprocessor as the output terminal of latch; Pin 3 is earth terminals, and pin 8 is power ends, for giving electric leakage chip power supply.
The output of pin 7 has earth leakage protection characteristic fast, and before input voltage is lower than setting, latch remains low always, and when leakage current surpasses setting, output uprises.Microprocessor is brought in and has been judged whether that electric leakage situation occurs by the output of detection latches.
The output terminal of microprocessor Real-Time Monitoring electric leakage chip; if the output terminal of a certain moment detection of electrical leakage chip jumps to high level from low level suddenly; illustrating in subscriber's line circuit has leaky to occur; the hummer that now microprocessor starts alarm module inside in time sends rapidly alarm sound; then pilot relay is operated a switch in time, to protect subscriber's line circuit and user's the security of the lives and property.
Claims (1)
1. with an ammeter for earth leakage detection functions, comprise ammeter body, it is characterized in that: current detecting chip, microprocessor and alarm and relay are installed on ammeter, and described current detecting chip, alarm and relay are connected with microprocessor respectively; Described current detecting chip internal is a leakage protection circuit; described leakage protection circuit is by differential amplifier; latch and voltage adjuster form; wherein 2 of differential amplifier input ends are connected to secondary for detection of leakage current; current signal is amplified by differential amplifier and by external capacitor integration; be connected to the input end of latch, the output terminal of described latch is connected with described microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420253387.7U CN203949950U (en) | 2014-05-19 | 2014-05-19 | A kind of ammeter with earth leakage detection functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420253387.7U CN203949950U (en) | 2014-05-19 | 2014-05-19 | A kind of ammeter with earth leakage detection functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203949950U true CN203949950U (en) | 2014-11-19 |
Family
ID=51891979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420253387.7U Expired - Fee Related CN203949950U (en) | 2014-05-19 | 2014-05-19 | A kind of ammeter with earth leakage detection functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203949950U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866493A (en) * | 2016-05-27 | 2016-08-17 | 徐州呼机械制造有限公司 | Electric meter box with electric leakage detection function |
| CN108037334A (en) * | 2015-11-27 | 2018-05-15 | 浙江八达电子仪表有限公司 | Gather the single-phase intelligent electric energy meter structure of residual current |
-
2014
- 2014-05-19 CN CN201420253387.7U patent/CN203949950U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037334A (en) * | 2015-11-27 | 2018-05-15 | 浙江八达电子仪表有限公司 | Gather the single-phase intelligent electric energy meter structure of residual current |
| CN105866493A (en) * | 2016-05-27 | 2016-08-17 | 徐州呼机械制造有限公司 | Electric meter box with electric leakage detection function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103401103B (en) | Automatic cut-off conversion socket for electric apparatus standby | |
| CN204068200U (en) | A electrical leakage protector | |
| CN204167871U (en) | A kind of Aftercurrent protection circuit breaker | |
| CN203949950U (en) | A kind of ammeter with earth leakage detection functions | |
| CN202712621U (en) | Intelligent safe socket | |
| CN207218244U (en) | A kind of direct current reverse-connection preventing circuit | |
| CN202444132U (en) | Safety anti-electric shock socket | |
| CN201846125U (en) | Control system of automobile power | |
| CN201422011Y (en) | Leakage-detecting protective circuit | |
| CN203276459U (en) | Electrical fire monitoring detector having overvoltage under-voltage detecting and protective functions | |
| CN103033668A (en) | Electric current detection circuit | |
| CN203180491U (en) | Electric leakage protection device | |
| CN208908356U (en) | A kind of earth leakage protective device | |
| CN202939760U (en) | Multifunctional electrical fire monitoring detector | |
| CN104253411A (en) | Protective circuit having functions of both alarm and electric leakage detection | |
| CN206412749U (en) | The control circuit of the earth leakage protective device of the double protections of ground wire | |
| CN206412751U (en) | The control circuit of earth leakage protective device with overvoltage protection | |
| CN205375089U (en) | Take power supply switching circuit of isolation control function | |
| CN211209301U (en) | Live line short circuit arc light elimination circuit | |
| CN203480360U (en) | Power strip | |
| CN202931271U (en) | Energy conservation safety switch | |
| CN204696374U (en) | A kind of smart jack based on residual current monitoring | |
| CN204376376U (en) | Based on the time lagged type residual current action breaker of Quick-type electric leakage integrated package | |
| CN203722902U (en) | High/low-voltage withdrawal automatic switching circuit for high-voltage electronic pulse detector | |
| CN204390438U (en) | Safety interaction fuel gas alarm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20141119 |