CN201682263U - Leakage protection device - Google Patents
Leakage protection device Download PDFInfo
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- CN201682263U CN201682263U CN2010201964707U CN201020196470U CN201682263U CN 201682263 U CN201682263 U CN 201682263U CN 2010201964707 U CN2010201964707 U CN 2010201964707U CN 201020196470 U CN201020196470 U CN 201020196470U CN 201682263 U CN201682263 U CN 201682263U
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Abstract
The utility model discloses a two-wire leakage protection device. The leakage protection device integrates an overload protection function, a short circuit protection function, an overvoltage protection function, a leakage protection function, an electric shock protection function, an automatic reclosing protection function and the like, can conveniently control multiple leakage protection switching systems and display the parameters of the load voltage, the load current, the leakage current and the like of a low-voltage alternating current power grid, and the current working state of the leakage protection device, the historical working state of a leakage protection switch and the like can also be displayed; the leakage protection device has a friendly human-computer interface, simultaneously can also distinguish the leakage current and the electric shock current, and can reduce the unessential tripping operation of the leakage protection device, which is caused by the leakage of an electrical circuit and equipment, and moreover, the safety of the leakage protection device can also be enhanced.
Description
Technical field
The utility model relates to a kind of earth leakage protective device.
Background technology
At present in the low-voltage alternating-current electrical network in order to protect personal safety; avoid taking place electric accident and be extensive use of circuit breaker or earth leakage protective device; general usefulness is the miniature circuit breaker or the earth leakage protective device of twin wire in the circuit that inserts household electricity; this its basic principle of small-sized earth leakage protective device is that zero sequence current mutual inductor is passed on low-voltage alternating-current grid line road; the residual current on the low-voltage alternating-current grid line road that the output of zero sequence current mutual inductor secondary side is sensed; reflect the leakage current situation between low-voltage alternating-current electrical network and the earth; animal's electric shock or electric wiring take place between low-voltage alternating current power supply line and the earth; during equipment generation electric leakage situation; the residual current of zero sequence current mutual inductor output induction changes; when detecting the residual current variation and reaching rating number; start tripping mechanism excision power supply, to reach the purpose of protection.
The small-sized earth leakage protective device of existing twin wire is comparatively simple mostly in the market, has and lack intelligent control, insufficiency, branch body structure, wiring complexity, lacks defectives such as effective man-machine dialog interface.
Summary of the invention
Deficiency at above-mentioned prior art existence; technical problem to be solved in the utility model be to provide a kind of multiple functional, simple, intelligent integrated twin wire earth leakage protective device is installed; leakage relay, A.C. contactor and air circuit three's function that this device is integrated; adopt the microcomputer chip programming Control, finish collection, processing, analyze and make the control corresponding action signal.
The technical solution of the utility model: a kind of earth leakage protective device; comprise a housing; be provided with printing control circuit board, magnetic switch, power transformer, zero sequence current mutual inductor and load current instrument transformer in this housing, described printing control circuit board comprises with lower unit:
Main Control Unit;
Link to each other with magnetic switch and insert the magnetic switch control unit of Main Control Unit, be used to receive the break-make of the control signal of Main Control Unit with the control magnetic switch;
Link to each other with power transformer and insert the power supply processing unit of Main Control Unit, be used to device that power supply is provided and gather voltage signal and import Main Control Unit into;
Link to each other with zero sequence current mutual inductor and insert the leakage current signal processing unit of Main Control Unit, be used to gather residual current that zero sequence current mutual inductor senses and import acquired signal into Main Control Unit;
Link to each other with the load current instrument transformer and insert the load current signal processing unit of Main Control Unit, be used to gather the transformer induced load current of load current and import acquired signal into Main Control Unit;
The keyboard processing unit that links to each other with Main Control Unit;
The display unit that links to each other with Main Control Unit is used for the numerical value and the unit of display voltage, electric current;
The state indicating member that links to each other with Main Control Unit is used to indicate the running status of current earth leakage protective device and the malfunction of circuit.
Signal is divided into two-way at described power supply processing unit after rectification, wherein one the tunnel after filtering, voltage stabilizing at different levels, as the power supply use of device, after another road process filtering, the dividing potential drop, the signal of gained is sent into Main Control Unit, be used to judge the ruuning situation of load voltage.
Described leakage current signal processing unit is divided into two-way, the one tunnel with the signal amplification that receives, rectification, filtering, send into Main Control Unit after amplifying once more, is used for the judgement of electric shock signal; Amplify the signal that receives, send into Main Control Unit after amplifying directly, once more on another road, is used for the judgement of electric leakage signal.
Described load current signal processing unit is sent into Main Control Unit with the signal that receives after handling by inverse time-lag protection after over commutation, the filtering, be used to judge the overload and the short-circuit conditions of load current again.
Described Main Control Unit also is connected to the preserved signal coffret, is used for carrying out with external equipment the upgrading of data input and output and software.
Earth leakage protective device provided by the utility model has satisfied a kind of easy installation, has used the requirement of reliable, multiple functional high integrated intelligent creepage protection function.Earth leakage protective device is integrated to overload, short circuit, electric leakage, electric shock, function such as coincidence is an one automatically; multichannel earth leakage circuit-breaker system and parameters such as the load voltage that shows the low-voltage alternating-current electrical network, load current, leakage current be can control easily, the present operating state of earth leakage protective device, the functions such as historical operating state of earth leakage circuit-breaker also can be shown.The utility model improves the earth leakage protective device performance significantly with lower cost, has both improved power supply quality and the fruitless labour that has reduced the power supply management person, has also further improved the operational percentage of earth leakage protective device.
Description of drawings
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is a leakage current signal processing unit theory diagram of the present utility model;
Fig. 3 is the panel displayed map of integrated electricity leakage protection device of the present utility model.
Embodiment
Shown in accompanying drawing 1,2, the chip IC 1 of Main Control Unit 10 is the microprocessor of band A/D function.AC power connecting to neutral live wire A, B terminal, equidirectional zero sequence current mutual inductor 1 back of passing of lead is to load-side A ', B ' terminal, the input of the secondary side joint leakage current signal processing unit 2 of zero sequence current mutual inductor 1, leakage current signal processing unit 2 is responsible for the signal that receives, send into two passages of independent operating respectively, one of them passage is that 14 pairs of these signals of leakage current treatment circuit amplify, send into Main Control Unit 10 after the rectification, filtering, carries out the analysis and judgement of electric leakage signal; The another one passage is that 15 pairs of these signals of shock current treatment circuit amplify, the isolated DC component, send into Main Control Unit 10 after amplifying once more, is read in real time by 10 pairs of these signals of Main Control Unit, carries out the analysis and judgement of electric shock signal.
Because on the principles of electric and electronic engineering; it also is a kind of leaky that the animal electric shock takes place between AC power and the earth; there is not difference in essence with electric appliance circuits, equipment electric leakage; but allow to flow through animal particularly the safe current value of human body compare with the current value that allows electric wiring, equipment electric leakage and be much smaller; purpose for the safety that watches for animals, the inessential dropout of minimizing; the utility model adopts leakage current signal and shock current signal is divided into two passage operations that work alone, and by master controller leakage current and shock current is distinguished.Handle by the leakage current passage for non-shock current response, have only during like this for electric wiring, equipment electric leakage to arrive and just send trip signal when presetting the leakage current gear.Can obviously reduce the inessential dropout action that non-shock current causes like this, thereby improve the dependability of low-voltage alternating-current electrical network; Comparatively sensitive because of what the shock current operating value was set again, have the high characteristics of coefficient safe in utilization.
The input of the secondary side joint load current signal processing unit 4 of load current instrument transformer 3; load current signal processing unit 4 is responsible for the signals that will receive and sends into Main Control Unit 10 after after over commutation, the filtering signal being handled by inverse time-lag protection, and situations such as the overcurrent of load current and short circuit are discerned.
The AC power output of power transformer 7 connects power supply processing unit 8, signal is divided into two-way behind diode rectification in power supply processing unit 8, wherein one the tunnel after capacitor filtering, pressurizer voltage stabilizing, power supply as device uses, Main Control Unit 10 after capacitor filtering and the voltage stabilizing didoe voltage stabilizing, is sent the signal of gained into through electric resistance partial pressure in another road, Main Control Unit 10 is determined the ruuning situation of load voltage by analysis and judgement.
When moving Main Control Unit 10, send the order of tripping operation or combined floodgate and give magnetic switch control unit 6, the signal process Signal Spacing control magnetic switch 5 of magnetic switch control unit 6 outputs by the various signals that analysis receives.The tripping mechanism that constitutes for magnetic switch 5 is kept controlling by heavy current adhesive and weak current, when device powers on, with forceful electric power diffluence adhesive magnetic switch 5, and keep certain pickup time, judge by the circuit feedback signal that if magnetic switch 5 has been inhaled and, then when the heavy current zero crossing, cut off heavy current and use suction and the state that weak current maintains magnetic switch 5 instead; Like this,, then disconnect attract current, send the adhesive failure signal, reach the purpose of final operation and protection if magnetic switch 5 does not have adhesive.
As the schematic diagram that Fig. 3 shows for the earth leakage protective device panel, display unit 12 shows the numerical value of various signals, and the unit of electric current and voltage.
State indicating member 13 is used to indicate the running status of current earth leakage protective device and the malfunction of circuit, comprises indication "on" position, electric leakage state, overcurrent shape, electric shock state, alarm condition etc.
Can understand ruuning situation in real time by display unit 12 and state indicating member 13, when breaking down, can demonstrate concrete malfunction in real time, make the user take countermeasure to solve fault in time.
The utility model also provides multiple parameter that selection can manually be set, to satisfy requirements of different users.Specified leakage current has 80mA/120mA/160mA available.The user can select various parameters freely by the button of operation keyboard processing unit 11, when parameter is set, the user is by being provided with button 22,23, read button 24, confirm that button 25 carries out its inner parameter is adjusted, the parameter that can avoid like this causing because of carelessness changes by mistake moving, and the utility model can also be consulted at that time load voltage and load current condition at any time showing on the basis of leakage current in real time.
The utility model also comprises a preserved signal coffret, by crossover sub, can be used for carrying out the data input and output with external equipment, also makes things convenient for the upgrading of software.As in order to adopt long-distance management system that device is control effectively, can increase short message prompt function, when trip protection took place device, device can send information to the person in charge, notice failure cause and corresponding fault numerical value and corresponding device thereof information.Malfunction is in time handled, do not used and do not influence other circuit.Solved the simple present situation of device, improved the managerial skills and the operating efficiency of device terminal by people's management and difficult management.
Claims (5)
1. earth leakage protective device; comprise a housing; be provided with printing control circuit board, magnetic switch (5), power transformer (7), zero sequence current mutual inductor (1) and load current instrument transformer (3) in this housing, it is characterized in that described printing control circuit board comprises with lower unit:
Main Control Unit (10);
Link to each other with magnetic switch (5) and insert the magnetic switch control unit (6) of Main Control Unit (10), be used to receive the break-make of the control signal of Main Control Unit (10) with control magnetic switch (5);
Link to each other with power transformer (7) and insert the power supply processing unit (8) of Main Control Unit (10), be used to device that power supply is provided and gather voltage signal and import Main Control Unit (10) into;
Link to each other with zero sequence current mutual inductor (1) and insert the leakage current signal processing unit (2) of Main Control Unit (10), be used to gather residual current that zero sequence current mutual inductor (1) senses and import acquired signal into Main Control Unit (10);
Link to each other with load current instrument transformer (3) and insert the load current signal processing unit (4) of Main Control Unit (10), be used to gather the load current of load current instrument transformer (3) induction and import acquired signal into Main Control Unit (10);
The keyboard processing unit (11) that links to each other with Main Control Unit (10);
The display unit that links to each other with Main Control Unit (12) is used for the numerical value and the unit of display voltage, electric current;
The state indicating member (13) that links to each other with Main Control Unit is used to indicate the running status of current earth leakage protective device and the malfunction of circuit.
2. a kind of earth leakage protective device according to claim 1; it is characterized in that; signal is divided into two-way after rectification in power supply processing unit (8); wherein one the tunnel after filtering, voltage stabilizing at different levels; power supply as device uses; after another road process filtering, the dividing potential drop, the signal of gained is sent into Main Control Unit, be used to judge the ruuning situation of load voltage.
3. a kind of earth leakage protective device according to claim 1, it is characterized in that, described leakage current signal processing unit (2) is divided into two-way, the one tunnel with the signal amplification that receives, rectification, filtering, send into Main Control Unit (10) after amplifying once more, is used for the judgement of electric shock signal; Amplify the signal that receives, send into Main Control Unit (10) after amplifying directly, once more on another road, is used for the judgement of electric leakage signal.
4. a kind of earth leakage protective device according to claim 1; it is characterized in that; described load current signal processing unit (4) is sent into Main Control Unit (10) with the signal that receives after handling by inverse time-lag protection after over commutation, the filtering, be used to judge the overload and the short-circuit conditions of load current again.
5. a kind of earth leakage protective device according to claim 1 is characterized in that, described Main Control Unit (10) also is connected to the preserved signal coffret, is used for carrying out with external equipment the upgrading of data input and output and software.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201964707U CN201682263U (en) | 2010-05-19 | 2010-05-19 | Leakage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201964707U CN201682263U (en) | 2010-05-19 | 2010-05-19 | Leakage protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201682263U true CN201682263U (en) | 2010-12-22 |
Family
ID=43347296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201964707U Expired - Fee Related CN201682263U (en) | 2010-05-19 | 2010-05-19 | Leakage protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201682263U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332701A (en) * | 2011-09-15 | 2012-01-25 | 樊嵩 | Safety intelligent leakage protector and control method thereof |
| CN102427003A (en) * | 2011-09-19 | 2012-04-25 | 广东天富电气集团有限公司 | Intelligent tripping device working method |
| CN104682332A (en) * | 2013-11-30 | 2015-06-03 | 哈尔滨智木科技有限公司 | Intelligent high-current circuit breaker |
| CN104836189A (en) * | 2015-04-14 | 2015-08-12 | 华南理工大学建筑设计研究院 | Electric protective device capable of being self reset and remotely reset and method thereof |
| CN105449630A (en) * | 2015-12-31 | 2016-03-30 | 温州佳华仪表电气科技有限公司 | High-performance electric leakage electric control box |
| CN105762759A (en) * | 2014-12-18 | 2016-07-13 | 国家电网公司 | Electric leakage protection apparatus of intelligent-type rural power grid power distribution terminal |
| CN105914706A (en) * | 2016-06-27 | 2016-08-31 | 毛春梅 | Electric-shock-preventing power supply transformer |
| CN106229227A (en) * | 2016-09-27 | 2016-12-14 | 福建通力达实业有限公司 | A kind of intelligent leakage circuit breaker |
| CN108376968A (en) * | 2018-01-12 | 2018-08-07 | 南京捷泰电力设备有限公司 | The earth leakage protective device of household and similar applications with creepage protection function ESC Escape |
-
2010
- 2010-05-19 CN CN2010201964707U patent/CN201682263U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332701A (en) * | 2011-09-15 | 2012-01-25 | 樊嵩 | Safety intelligent leakage protector and control method thereof |
| CN102332701B (en) * | 2011-09-15 | 2014-04-09 | 樊嵩 | Safety intelligent leakage protector and control method thereof |
| CN102427003A (en) * | 2011-09-19 | 2012-04-25 | 广东天富电气集团有限公司 | Intelligent tripping device working method |
| CN104682332A (en) * | 2013-11-30 | 2015-06-03 | 哈尔滨智木科技有限公司 | Intelligent high-current circuit breaker |
| CN105762759A (en) * | 2014-12-18 | 2016-07-13 | 国家电网公司 | Electric leakage protection apparatus of intelligent-type rural power grid power distribution terminal |
| CN104836189A (en) * | 2015-04-14 | 2015-08-12 | 华南理工大学建筑设计研究院 | Electric protective device capable of being self reset and remotely reset and method thereof |
| CN104836189B (en) * | 2015-04-14 | 2018-01-26 | 华南理工大学建筑设计研究院 | It is a kind of can Self-resetting and remote reset electric protective device and its method |
| CN105449630A (en) * | 2015-12-31 | 2016-03-30 | 温州佳华仪表电气科技有限公司 | High-performance electric leakage electric control box |
| CN105914706A (en) * | 2016-06-27 | 2016-08-31 | 毛春梅 | Electric-shock-preventing power supply transformer |
| CN106229227A (en) * | 2016-09-27 | 2016-12-14 | 福建通力达实业有限公司 | A kind of intelligent leakage circuit breaker |
| CN108376968A (en) * | 2018-01-12 | 2018-08-07 | 南京捷泰电力设备有限公司 | The earth leakage protective device of household and similar applications with creepage protection function ESC Escape |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LIN'AN YI'AN ELECTRON TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: WANG SHIGANG Effective date: 20130106 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130106 Address after: Hangzhou City, Zhejiang province Ling'an City Road 311300, Jincheng Street No. 2 Ling'an Yian Power Electronic Technology Co., Ltd. Patentee after: Lin'an Yian Electric Power Electronic Science & Technology Co., Ltd. Address before: 311300 Zhejiang city of Ling'an Province Jincheng Street Lang Road No. 2 Ling'an Yian Power Electronic Technology Co. Ltd. Patentee before: Wang Shigang |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101222 Termination date: 20180519 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |