CN204287362U - A kind of power distribution network electric leakage detector - Google Patents
A kind of power distribution network electric leakage detector Download PDFInfo
- Publication number
- CN204287362U CN204287362U CN201420388675.3U CN201420388675U CN204287362U CN 204287362 U CN204287362 U CN 204287362U CN 201420388675 U CN201420388675 U CN 201420388675U CN 204287362 U CN204287362 U CN 204287362U
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- distribution network
- power distribution
- electric leakage
- leakage
- network electric
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- Expired - Fee Related
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
A kind of 220V/380V power line distribution network electric leakage detector, device comprises open-close type residual current transformer and judges that indicating circuit forms, it is characterized in that leakage current indicating device is arranged on power distribution network user entry end, the sign that leakage current exceeds standard is provided mainly through uninterruptedly monitoring leakage current, self-powered with timer, avoid the malfunction of tripping that phase shortage causes and upper surge.
Description
Technical field
The utility model is a kind of device of 220V/380V power line distribution network leakage current instruction, is arranged on line of electric force easily, and provides the sign that leakage current exceeds standard by uninterruptedly monitoring leakage current.
Background technology
Since the mankind make electricity consumption, electricity brings a lot of convenience to the mankind, also brings on a disaster to the mankind.It may burn out electrical equipment, causes fire, or people is got an electric shock.Omnifarious electrical equipment is following one by one while, be also born protector miscellaneous.Wherein having a kind of is special protection people, is called earth leakage protective device.Earth leakage protective device is commonly called as leakage switch, is to get an electric shock for the person anti-when circuit or electrical apparatus insulation impaired generation shorted to earth, is generally installed on the electric power incoming line of receptacle loop Shang Hequan building consumer unit of each household panel box.
Earth leakage protection follows cascade protection principle, the residual current operated protective device of multistage installing, selective cooperation on the time limit.
Actual some places are in end protection work, and because end is not all protected, total protection still focuses on direct protection, its action current can not be amplified and delay actuation time, thus still act frequently, reduce power supply reliability.Moreover end protection act always protects also action, people are made to can't see the effect of installing end protection.
At present; due to protector set error, aging, working environment worsen, the reason such as the non-full guard of end and early stage and design comparison fall behind; the tripping operation caused is unreasonable; and cannot find by protector place of leaking electricity at a glance; and then to isolate rapidly and fix a breakdown ， Give Supply Security and reliability bring puzzlement.
Summary of the invention
In order to overcome existing earth leakage protective deficiency; the utility model provides a kind of easy for installation; uninterruptedly can monitor leakage current and provide the sign that leakage current exceeds standard; simplify installation process; improve accuracy; also place of leaking electricity can clearly be found, simultaneously self-powered, avoid the malfunction of tripping that phase shortage causes and upper surge.
The utility model solves the technical scheme that its technical matters adopts: by open-close type residual current transformer with judge that indicating circuit forms main body.Open-close type residual current transformer detects the size of leakage current, by the signal condition unit be made up of amplifier, the proportional amplification of the leakage current that residual current transformer is detected, zoom into the voltage signal that can be accepted by comparator unit, this voltage signal compares through comparer with reference voltage (voltage of adjusting), export electric leakage signal to indicating device, after indicating device receives electric leakage signal, provide obviously mark also energy disconnecting device own power source, after reset sign, device is again powered and is reworked, wherein amplification comparator circuit and indicating device composition judge indicating circuit.Power circuit, from charged pool, can charge to the battery carried simultaneously.Electric leakage instruction threshold values can be regulated by adjustable resistance adjusting reference voltage (voltage of adjusting), regulate filtering time, can effectively avoid a little impacting malfunction.Testing button is pressed, and internal circuit exports fixed voltage to amp.in, can the duty of test circuit.Adjustable resistance and testing button make this programme by setting parameter and test function.
Accompanying drawing explanation
Now further illustrate the utility model device in conjunction with Figure of description, wherein Fig. 1 is outside figure, and Fig. 2 is schematic diagram.Fig. 1 has 1-1,1-2 two mark, and Fig. 2 has 2-1,2-2,2-3,2-4 tetra-mark.
1-1 is open-close type residual current transformer, uses screw or buckle that open-close type residual current transformer is combined closely, also can take off and install easily, also device and high-pressure section are isolated simultaneously, improve the reliability of device.
1-2 is apparatus main body part, comprises main circuit, power supply, outside experiment button, adjusting knob of adjusting, electric leakage mark, describes the details of signal condition unit in fig. 2.
2-1 is the forward path of picking up signal; protected phase line, the neutral line are through ring-shaped core; constitute the primary winding of mutual inductor; the winding be wrapped on annular core constitutes the secondary coil of mutual inductor; if do not leak electricity generation; at this moment flow through phase line, the neutral line current vector and equal zero, therefore can not produce corresponding induction electromotive force on secondary coil.If there occurs electric leakage, the current vector of phase line, the neutral line and be not equal to zero, just make secondary coil produces induction electromotive force, this signal will be sent to intermediate link and be further processed.，
2-2 is Current amplifier link, adopts the circuit of differential amplification and internal mirror images electric current will accurately to measure the size of electric leakage.
2-3, for comparing execution and experiment link, after the electric leakage signal of amplification compares with reference signal, provides command signal after exceeding, and implements to identify action, and automatically the power supply of this province to save electric energy.Normal work is recovered after the mark that resets; Under normal circumstances, test button and test whether equipment is normal.
2-4 is power supply and live part, and owing to adopting low power dissipation design, overall power is low to moderate has chargeable loop to provide electric energy, and generalized case is by charging and slightly charge to battery, in mark saltus step situation and cannot under charge condition, by battery supplied electric energy.
Embodiment
This device is arranged on needs the place of electric leakage sign, user power utilization entrance, branched line outlet, multiple consumer entrance to go out.Taken off by this device folding residual current transformer, phase line of powering and zero line together through mutual inductor, have reinstalled open-close type residual current transformer, notice that the direction of power transmission is consistent with mark direction.Set electric leakage parameter by knob of adjusting, reset electric leakage mark, and device normally works.Whether button can normally work by proving installation by experiment, and point presses testing button, and normal condition electric leakage mark should have obvious mark.Must be resetted after each experiment electric leakage mark, and device is normally worked.
Claims (5)
1. a power distribution network electric leakage detector, device is by open-close type residual current transformer and judge that indicating circuit forms, it is characterized in that leakage current indicating device is arranged on power distribution network user entry end, the sign that leakage current exceeds standard is provided mainly through uninterruptedly monitoring leakage current, self-powered with timer, avoid the malfunction of tripping that phase shortage causes and upper surge.
2. the power distribution network electric leakage detector according to claims 1, it is characterized in that the Circuits System that there is open-close type residual current transformer He judge indicating circuit, can monitor according to open-close type residual current transformer the leakage data obtained and calculate electrical leakage quantity.
3. the power distribution network electric leakage detector according to claims 1, is characterized in that self-powered, possesses charge function.
4. the power distribution network electric leakage detector according to claims 1, is characterized in that the judgement indicating circuit had, and clearly indicates after judging electric leakage, and by device power-off, again powers after the mark that resets.
5. the power distribution network electric leakage detector according to claims 1, is characterized in that having parameter tuning, reset and test function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420388675.3U CN204287362U (en) | 2014-07-15 | 2014-07-15 | A kind of power distribution network electric leakage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420388675.3U CN204287362U (en) | 2014-07-15 | 2014-07-15 | A kind of power distribution network electric leakage detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204287362U true CN204287362U (en) | 2015-04-22 |
Family
ID=52870511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420388675.3U Expired - Fee Related CN204287362U (en) | 2014-07-15 | 2014-07-15 | A kind of power distribution network electric leakage detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204287362U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771814A (en) * | 2016-12-29 | 2017-05-31 | 国网浙江余姚市供电公司 | A kind of leakage current monitors instruction device |
| CN112009948A (en) * | 2019-09-17 | 2020-12-01 | 安徽同力科技发展有限公司 | Conveyor belt convenient to clean and capable of being tensioned |
-
2014
- 2014-07-15 CN CN201420388675.3U patent/CN204287362U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771814A (en) * | 2016-12-29 | 2017-05-31 | 国网浙江余姚市供电公司 | A kind of leakage current monitors instruction device |
| CN112009948A (en) * | 2019-09-17 | 2020-12-01 | 安徽同力科技发展有限公司 | Conveyor belt convenient to clean and capable of being tensioned |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20170715 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |