CN2728068Y - Leakage and over-voltage protector - Google Patents
Leakage and over-voltage protector Download PDFInfo
- Publication number
- CN2728068Y CN2728068Y CN 200420074534 CN200420074534U CN2728068Y CN 2728068 Y CN2728068 Y CN 2728068Y CN 200420074534 CN200420074534 CN 200420074534 CN 200420074534 U CN200420074534 U CN 200420074534U CN 2728068 Y CN2728068 Y CN 2728068Y
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- CN
- China
- Prior art keywords
- discharge tube
- leakage
- circuit
- over
- protective device
- 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
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Abstract
The utility model relates to a leakage and over-voltage protector. A current mutual inductor ZL is connected with the input terminal of an application-specific integrated circuit IC for leakage protector, and the output terminal of the integrated circuit IC is connected with the trigger electrode of a controlled silicon Q. One end of a trip coil JL is connected with the anode of the controlled silicon, the other end is connected with the live conductor L of the output terminal of the leakage protector, and the cathode of the controlled silicon is connected with the inner conductor N of the output terminal of the leakage protector. A discharge tube R4 is also connected into the circuit, one end of the discharge tube R4 is connected with the live conductor end of the power supply through the trip coil, and the other end is connected with the inner conductor end of the power supply. The utility model can realize the over-voltage protection function only by adding a discharge tube on the basis of original leakage protection circuit. The circuit of this leakage and over-voltage protector is simple and reliable without the need of debugging.
Description
Technical field
The utility model belongs to circuit protection device, particularly relates to a kind of earth leakage protective device.
Background technology
The leakage protection switch circuit of now popular on the market band over-voltage protection function mostly is to utilize the stabilized voltage characteristic of voltage stabilizing didoe to realize that its shortcoming one is that circuit complexity, element are many, the cost height, and the layout difficulty is big; The 2nd, circuit requirement precision height, debugging is not easy, and element is chosen difficulty.
Summary of the invention
The purpose of this utility model provides that a kind of circuit is simple, overvoltage protection is leaked electricity overvoltage protector reliably.
For achieving the above object; the utility model adopts following technical scheme: a kind of electric leakage overvoltage protector; current transformer ZL connects earth leakage protective device application-specific integrated circuit (ASIC) IC input; integrated circuit (IC) output termination controllable silicon Q trigger electrode; the termination controllable silicon positive pole of tripping coil JL; another termination earth leakage protective device output live wire L; the silicon controlled negative pole meets earth leakage protective device output zero line N; also be connected to discharge tube R4 in the circuit; discharge tube R4 one end is connected on the power firestreak end by trip coil, another termination zero-power line end.
Be connected to capacitor C 4 between the trigger electrode of controllable silicon Q and the zero line side, be connected to piezo-resistance RU between load end zero line and the live wire.
The utility model only needs to increase a discharge tube again on the basis of former leakage protection circuit can realize over-voltage protection function.The effect of this discharge tube in circuit is; under the normal condition; discharge tube is in by armed state always; when in case supply voltage exceeds the place value of discharge tube; the rapid conducting of discharge tube; make the direct and power supply communication generation high-intensity magnetic field of tripping coil, the tripping operation of interlock release is cut off the power supply, and the function of load is protected in realization.This circuit is simple and reliable, need not debugging, produces in batches so be more suitable for streamline.
Description of drawings
Accompanying drawing is depicted as circuit theory diagrams of the present utility model.
Embodiment:
As shown in the figure, the special-purpose device integrated circuit (IC) of earth leakage protective (FM2140) output termination controllable silicon Q trigger electrode, tripping coil JL one termination controllable silicon positive pole, another termination earth leakage protective device output live wire L, the silicon controlled negative pole meets earth leakage protective device output zero line N.Mutual inductor coil ZL one end connects 2 pin of IC by capacitor C 2,3 pin of another termination IC (i.e. input ground).The power supply circuits of earth leakage protective device application-specific integrated circuit (ASIC) (IC) are directly to meet earth leakage protective device output live wire L by resistance R 5, tripping coil JL, need not to add in addition AC DC change-over circuit.Discharge tube R4 one end connects the power firestreak end by trip coil JL, and the other end directly connects the zero-power line end.Discharge tube R4 can be pottery, solid or semiconductor discharge tube.Capacitor C 4 is connected between controllable silicon Q trigger electrode and the zero line, plays the anti-interference effect of High frequency filter.Piezo-resistance RU is connected between load end zero line and the live wire, plays anti-thunder and lightning and anti-short pulse interference effect.
At voltage just often, discharge tube R4 is in by armed state, in case when the overvoltage fault appearred in circuit, discharge tube is conducting immediately, trip coil JL is directly linked up with power supply produce high-intensity magnetic field, and interlock release tripping operation outage realizes protecting the function of load.The principle of earth leakage protective part is a prior art, no longer describes in detail.
Excess voltage protection of the present utility model also can be applied in separately on the household electrical appliance such as switch, plugs and sockets.
Claims (2)
1, a kind of electric leakage overvoltage protector; current transformer ZL connects earth leakage protective device application-specific integrated circuit (ASIC) IC input; integrated circuit (IC) output termination controllable silicon Q trigger electrode; the termination controllable silicon positive pole of tripping coil JL, another termination earth leakage protective device output live wire L, the silicon controlled negative pole meets earth leakage protective device output zero line N; it is characterized in that; also be connected to discharge tube R4 in the circuit, discharge tube R4 one end is connected on the power firestreak end by trip coil, another termination zero-power line end.
2, electric leakage overvoltage protector as claimed in claim 1 is characterized in that, is connected to capacitor C 4 between the trigger electrode of controllable silicon Q and the zero line side, is connected to piezo-resistance RU between load end zero line and the live wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420074534 CN2728068Y (en) | 2004-08-25 | 2004-08-25 | Leakage and over-voltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420074534 CN2728068Y (en) | 2004-08-25 | 2004-08-25 | Leakage and over-voltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2728068Y true CN2728068Y (en) | 2005-09-21 |
Family
ID=35044074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420074534 Expired - Fee Related CN2728068Y (en) | 2004-08-25 | 2004-08-25 | Leakage and over-voltage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2728068Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044978A (en) * | 2009-10-16 | 2011-05-04 | 群康科技(深圳)有限公司 | Power supply circuit and monitoring protection method thereof |
| CN107154610A (en) * | 2017-06-06 | 2017-09-12 | 卢世奎 | A kind of overvoltage electric leakage comprehensive protector |
-
2004
- 2004-08-25 CN CN 200420074534 patent/CN2728068Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044978A (en) * | 2009-10-16 | 2011-05-04 | 群康科技(深圳)有限公司 | Power supply circuit and monitoring protection method thereof |
| CN107154610A (en) * | 2017-06-06 | 2017-09-12 | 卢世奎 | A kind of overvoltage electric leakage comprehensive protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |