CN2728070Y - Multifunctional electric leakage protector - Google Patents
Multifunctional electric leakage protector Download PDFInfo
- Publication number
- CN2728070Y CN2728070Y CN 200420074533 CN200420074533U CN2728070Y CN 2728070 Y CN2728070 Y CN 2728070Y CN 200420074533 CN200420074533 CN 200420074533 CN 200420074533 U CN200420074533 U CN 200420074533U CN 2728070 Y CN2728070 Y CN 2728070Y
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- China
- Prior art keywords
- resistance
- electric leakage
- circuit
- leakage protector
- integrated circuit
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- 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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- Breakers (AREA)
Abstract
The utility model relates to a multifunctional electric leakage protector. The current transformer ZL is connected with the input terminal of the application-specific integrated circuits IC for electric leakage protector, and the output terminal of the integrated circuit IC is connected with the trigger electrode of the controlled silicon Q through a resistor R4. 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 at the output terminal of the electric leakage protector, and the cathode of the controlled silicon is connected with the inner conductor at the output terminal of the electric leakage protector. A piezoresistor R6 is also arranged in the circuit, one end of the piezoresistor R6 is connected with the live conductor terminal through the trip coil JL, and the other end is connected with the inner conductor terminal through the output terminal of the integrated circuit IC and the resistors R5 as well as R4. The other ends of the resistors R5 and R4 are connected in parallel with the trigger electrode of the controlled silicon Q. The utility model has the advantages of simple circuit, reliable over-voltage protection and low power consumption.
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; The 3rd, increased quiescent current, strengthened the power consumption of product.
Summary of the invention
The purpose of this utility model provides the multifunctional electric leakage protector that a kind of circuit is simple, overvoltage protection is reliable and low in energy consumption.
For achieving the above object; the utility model adopts following technical scheme: a kind of multifunctional electric leakage protector; current transformer ZL connects the input of earth leakage protective device application-specific integrated circuit (ASIC) IC; the output of integrated circuit (IC) connects controllable silicon Q trigger electrode by resistance R 4; the termination controllable silicon positive pole of tripping coil JL; another termination earth leakage protective device output live wire; the silicon controlled negative pole connects earth leakage protective device output zero line; also be connected to piezo-resistance R6 in the circuit; one end is connected on the live wire end by tripping coil JL; the other end is by resistance R 5; the output of R4 and integrated circuit (IC) is connected on zero line side, resistance R 5; the other end of R4 is attempted by on the trigger electrode of controllable silicon Q.
Be connected to piezo-resistance RU between load end zero line and the live wire.
The utility model utilizes piezo-resistance that the sensitivity characteristic of voltage is realized, voltage just often, piezo-resistance is in cut-off state, circuit is kept the normal power supply state.In case when the ultra-voltage fault occurring, piezo-resistance punctures, the driving controllable silicon makes tripping coil produce high-intensity magnetic field, interlock release tripping operation outage, the function of realization protection load.This circuit has omitted direct current conversion portion element, has simplified circuit layout, has reduced cost.Because at voltage just often, piezo-resistance is in by armed state, so no power waste simultaneously.The utility model circuit discreteness is little, and assembling and setting is convenient, produces in batches so be well suited 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 end of piezo-resistance R6 is connected on the power firestreak L by tripping coil JL; the other end is connected on the zero-power line N by 7,6 pin of resistance R 5, R4 and earth leakage protective device application-specific integrated circuit (ASIC) IC (FM2140); the common junction of resistance R 5, R4 is connected with controllable silicon Q trigger electrode; resistance R 4 provides the earth leakage protective signal for controllable silicon Q, and resistance R 5 provides the overvoltage protection signal for controllable silicon Q.Capacitor C 4 is connected between controllable silicon 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.Instrument transformer one end connects input 2 pin of IC by coupling capacitance C2,3 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 connect earth leakage protective device output live wire by resistance R 7, tripping coil JL, need not to add in addition the AC-DC change-over circuit.
Voltage just often, piezo-resistance R6 is in cut-off state, controllable silicon Q does not have the triggering signal can conducting, release maintains static power supply state.In case when the ultra-voltage fault occurring, piezo-resistance R6 punctures, the AC overvoltage signal directly is added in the trigger electrode of controllable silicon Q through R5, drives controllable silicon Q conducting and makes tripping coil produce high-intensity magnetic field, and interlock release tripping operation outage realizes the function of protection load.Circuit has omitted the direct current conversion portion, has simplified the circuit layout difficulty, has reduced cost.The principle of this circuit earth leakage protective part is a prior art, no longer describes in detail.
Claims (2)
1; a kind of multifunctional electric leakage protector; current transformer ZL connects the input of earth leakage protective device application-specific integrated circuit (ASIC) IC; the output of integrated circuit (IC) connects controllable silicon Q trigger electrode by resistance R 4; the termination controllable silicon positive pole of tripping coil JL; another termination earth leakage protective device output live wire; the silicon controlled negative pole connects earth leakage protective device output zero line; it is characterized in that; also be connected to piezo-resistance R6 in the circuit; one end is connected on the live wire end by tripping coil JL; the other end is by resistance R 5; the output of R4 and integrated circuit (IC) is connected on zero line side, resistance R 5; the other end of R4 is attempted by on the trigger electrode of controllable silicon Q.
2, earth leakage protective device as claimed in claim 1 is characterized in that, 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 200420074533 CN2728070Y (en) | 2004-08-25 | 2004-08-25 | Multifunctional electric leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420074533 CN2728070Y (en) | 2004-08-25 | 2004-08-25 | Multifunctional electric leakage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2728070Y true CN2728070Y (en) | 2005-09-21 |
Family
ID=35044076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420074533 Expired - Fee Related CN2728070Y (en) | 2004-08-25 | 2004-08-25 | Multifunctional electric leakage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2728070Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291051B (en) * | 2007-04-19 | 2012-09-19 | 三菱电机株式会社 | Circuit breaker |
-
2004
- 2004-08-25 CN CN 200420074533 patent/CN2728070Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291051B (en) * | 2007-04-19 | 2012-09-19 | 三菱电机株式会社 | Circuit breaker |
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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 |