CN201194327Y - Leakage detecting protection circuit - Google Patents
Leakage detecting protection circuit Download PDFInfo
- Publication number
- CN201194327Y CN201194327Y CNU200820079932XU CN200820079932U CN201194327Y CN 201194327 Y CN201194327 Y CN 201194327Y CN U200820079932X U CNU200820079932X U CN U200820079932XU CN 200820079932 U CN200820079932 U CN 200820079932U CN 201194327 Y CN201194327 Y CN 201194327Y
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- leakage current
- current detection
- attaching plug
- detection protection
- supply socket
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Abstract
The utility model discloses a leakage detection protective circuit, which comprises a rectification circuit, a current-limiting resistor, a controllable silicon and a release coil with built-in iron core. The rectification circuit, the release coil with built-in iron core and the controllable silicon are serially connected to form a loop; after current flows through the release coil, magnetic field is generated in the release coil, the built-in iron core acts, such that a rest button is released. The control pole of the controllable silicon is connected to the shielding layer of the power output line of a power socket/plug, a load side and an input side power front line via the current-limiting resistor and a switch. When the power socket/plug leaks current, a test button is pressed manually, and after the power input terminal of the power socket/plug is connected to the power line in the wall, the controllable silicon is conducted without any components being operated, and the power socket/plug is detected to confirm whether the life is end. The leakage detection protective circuit can also regularly detect whether the life of power socket/plug is end by a timer.
Description
Technical field
The utility model relates to a kind of be applied to the have supply socket of creepage protection function, the leakage current detection protection circuit with detection of electrical leakage, defencive function in the attaching plug; specifically, the utility model relate to a kind of have regularly detect the leakage current detection protection circuit whether attaching plug, supply socket have creepage protection function.In addition, need not to operate any parts after the power input of supply socket, attaching plug and the power line in the wall connect, the utility model just can carry out life-span stop detection and show testing result supply socket, attaching plug automatically.The disclosed leakage current detection protection circuit of the utility model is also to having protective effect owing to the instantaneous pressure that is struck by lightning or other reasons causes to the destruction that supply socket, attaching plug cause.
Background technology
Along with the continuous development of the supply socket with creepage protection function, attaching plug industry, people require more and more higher to the supply socket with creepage protection function, the safety in utilization of attaching plug.Hope can regularly or regularly detect it and whether have creepage protection function in earth leakage protective socket/plug use; When its inner components and parts lost efficacy the forfeiture creepage protection function when its end-of-life, can in time remind the user, change new product.
Yet; its inner leakage current detection protection circuit of common in the market supply socket/attaching plug with creepage protection function; not only do not have life end checking function; and; when its end-of-life, concerning the user without any prompt facility, its reset button still can reset; the single-phase three-wire power supply output plughole of the load output of earth leakage protective socket/plug and receptacle face still has power supply output, misleads the user and continues to use.When leaky occurring,, very easily cause the get an electric shock generation of dead accident of user because this earth leakage protective socket do not have any protective effect.
Summary of the invention
In view of the foregoing, main purpose of the present utility model provides a kind of interior circuit leakage current detection protection circuit succinct, stable and reliable for performance of supply socket/attaching plug that is applied to have creepage protection function.
Another purpose of the present utility model provides a kind of leakage current detection protection circuit with anti lightning invasion and attack and electrophoresis functions.
Another purpose of the present utility model provide a kind of have regularly detect the leakage current detection protection circuit whether attaching plug, supply socket have creepage protection function.
Another purpose of the present utility model provide a kind of be applied in attaching plug/supply socket, after the power input of attaching plug/supply socket and the power line in the wall connect, need not to operate any parts and just can whether still have the leakage current detection protection circuit that creepage protection function detected and showed testing result to supply socket/attaching plug automatically.When supply socket/the attaching plug inner member is intact when not having end-of-life, this leakage current detection protection circuit makes homing light bright, expression can be set up correct reset mechanism automatically can reset reset button, after resetting, homing light extinguishes, the power supply output indicator is bright, illustrates that supply socket/attaching plug can operate as normal; When supply socket/attaching plug inner member open circuit or short circuit are end-of-life; the utility model leakage current detection protection circuit does not work by homing light and represents supply socket/attaching plug end-of-life and stop reset button to reset, supply socket/attaching plug of reminding the user in time more to renew.
For achieving the above object, the utility model by the following technical solutions: a kind of leakage current detection protection circuit, this leakage current detection protection circuit comprise rectification circuit, current-limiting resistance, controllable silicon, are built-in with the tripping coil of iron core;
Rectification circuit, the tripping coil that is built-in with iron core, controllable silicon are one another in series and form the loop;
The silicon controlled control utmost point links to each other by the screen of current-limiting resistance with supply socket/attaching plug power supply output line;
After having electric current to flow through in the tripping coil, produce magnetic field in the tripping coil, its built-in iron core action is threaded off reset button.
The described silicon controlled control utmost point also links to each other with power firestreak by the Test Switchboard under current-limiting resistance, the manual test button, forms and manually produces simulation leakage current circuit.
This leakage current detection protection circuit also includes a timing chip; The control signal output ends of this timing chip extremely links to each other with described silicon controlled control, just exports a control signal at interval at regular intervals, makes the controllable silicon conducting, and whether cycle detection supply socket/attaching plug still has creepage protection function.
Whether this leakage current detection protection circuit need not to operate any parts just can still have creepage protection function to supply socket/attaching plug automatically and detect; The described silicon controlled control utmost point is by current-limiting resistance, link to each other with the live wire of power input with the switch that is connected in the main circuit power supply of reset button interlock; After the power input of attaching plug/supply socket and the power line in the wall connect, under the state of not operating any parts, reset button is in trip status, be in off-state with the switch that is connected in the main circuit power supply of reset button interlock, the silicon controlled control utmost point is by current-limiting resistance, link to each other with the live wire of power input with the switch that is connected in the main circuit power supply of reset button interlock; After reset button resetted, with the switch closure of reset button interlock, the live wire of the silicon controlled control utmost point and power input disconnected.
Described rectification circuit is the bridge diode rectification circuit, and its ac power input end links to each other with the supply socket/power firestreak of attaching plug load-side, zero line.
This leakage current detection protection circuit also comprises the discharge metal sheet of two that be used to discharge, right angle trigonometry shapes; Described discharge metal sheet is connected to supply socket/attaching plug power input live wire, zero line place, and the discharge metal sheet tip of two right angle trigonometry shapes is staggered relatively, and keeps certain intervals.
Be parallel with the piezo-resistance that is used to prevent electrophoresis at described silicon controlled two ends.
In described controllable silicon conducting loop, be connected with one and be used to represent the whether homing light of end-of-life of supply socket/attaching plug.
The utility model circuit is succinct, stable and reliable for performance; Have anti lightning invasion and attack and electrophoresis functions; Can regularly detect attaching plug, whether supply socket has creepage protection function; And, after the power input of attaching plug/supply socket and the power line in the wall connect, need not to operate any parts and just can be automatically whether supply socket/attaching plug be still had creepage protection function and detect and show testing result.
Description of drawings
Fig. 1 is the disclosed leakage current detection protection circuit embodiment 1 physical circuit figure of the utility model;
Fig. 2 is the disclosed leakage current detection protection circuit embodiment 2 physical circuit figure of the utility model;
Fig. 3 is the disclosed leakage current detection protection circuit embodiment 3 physical circuit figure of the utility model;
Fig. 4 is the disclosed leakage current detection protection circuit embodiment 4 physical circuit figure of the utility model;
Fig. 5 is the disclosed leakage current detection protection circuit embodiment 5 physical circuit figure of the utility model;
Fig. 6 is the disclosed leakage current detection protection circuit embodiment 6 physical circuit figure of the utility model.
Embodiment
Fig. 1 is applied to have the interior leakage current detection protection circuit of supply socket/attaching plug of creepage protection function for the utility model is disclosed.As shown in Figure 1, this leakage current detection protection circuit is made of rectification circuit, current-limiting resistance R1～R5, diode V5, controllable silicon V6, the tripping coil L1 (SOL) that is built-in with iron core.
The built-in iron core action of tripping coil L1 can make reset button RESET thread off; The tripping coil L1 that is built-in with iron core is with after controllable silicon V6 connects, and is connected on the positive and negative power output end of the DC power supply that rectification circuit provides.
The control utmost point of controllable silicon V6 links to each other with the screen of supply socket/attaching plug power supply output line by current-limiting resistance R3, diode V5, current-limiting resistance R2.Supply socket/attaching plug power supply output live wire HOT, zero line WHITE and protective earth PE are wrapped in the screen, and this screen is formed by the alloy wire braiding of metals such as copper, iron.When there is leaky in supply socket/attaching plug; because the electric current of operating load is often bigger; the plastic protective sleeve of the outer bread of power firestreak or zero line or protective earth begins until thawing from softening; cause the damaged meeting of insulating barrier contact with screen; make screen charged; so, when screen is charged, can judge quickly and accurately that there is leak current fault in supply socket/attaching plug.
When there is leaky (leak current fault) in supply socket/attaching plug, screen is charged, the control of controllable silicon V6 is high level very, controllable silicon V6 conducting has electric current to flow through in the tripping coil L1, produces magnetic field in the tripping coil L1, its built-in iron core action, make reset button RESET dropout/tripping operation, the K switch 1, the K2 that link with reset button RESET in deenergization plug/supply socket master current supply circuit make supply socket/attaching plug not have power supply output.
Whether has the current leakage detection protection function in order manually to detect supply socket/attaching plug; end-of-life whether; as shown in Figure 1, the control utmost point of controllable silicon V6 also links to each other with power firestreak by the Test Switchboard under current-limiting resistance R3, R1, diode V5, the manual test button TEST.Manually push testing button TEST and produce the simulation leakage current, the control utmost point of controllable silicon V6 is linked to each other with power firestreak by current-limiting resistance R3, R1.Still has creepage protection function if having the supply socket/attaching plug of creepage protection function; there is not end-of-life; then controllable silicon V6 conducting; there is electric current to flow through in the tripping coil L1; produce magnetic field, its built-in iron core action is threaded off reset button RESET; cut off the electricity supply switch in plug/supply socket master current supply circuit makes supply socket/attaching plug not have power supply output.Otherwise if supply socket/attaching plug end-of-life has been arranged, then reset button RESET can not thread off/or reset.
As shown in the figure, described rectification circuit is a bridge rectifier that is made of diode V1～V4, and its ac power input end links to each other with power firestreak HOT, the zero line WHITE of supply socket/attaching plug load-side LOAD.
In order to improve the useful life of earth leakage protective socket; avoid because the destruction that the instantaneous pressure that thunderbolt or other reasons cause causes supply socket/attaching plug; as shown in Figure 1, the utility model is connected with discharge metal sheet P1, the P2 of that be used to discharge, a right angle trigonometry shape respectively at supply socket/attaching plug power input live wire HOT, zero line WHITE place.The discharge metal sheet P1 of two right angle trigonometry shapes, P2 tip are staggered relatively, and keep certain intervals.At the two ends of controllable silicon V6 piezo-resistance MOV in parallel.
When because thunderbolt or the instantaneous pressure that causes of other reasons when acting on supply socket/attaching plug; the air dielectric that is connected to the point discharge sheet metal P1 at input live wire place and is connected between the point discharge sheet metal P2 at input zero line place is breakdown; form atmospherical discharges; most of high pressure consumes by the discharge metal sheet; the residue sub-fraction consumes by tripping coil SOL, piezo-resistance MOV, thereby has protected supply socket/attaching plug not broken by high pressure.
In specific embodiment of the utility model, described piezo-resistance MOV selects surge inhibition type piezo-resistance for use, makes it can also play the effect that prevents electrophoresis.
In order to represent the state of supply socket/attaching plug, the utility model is parallel with the whether homing light LED1 of end-of-life of a supply socket/attaching plug that is used to represent to have creepage protection function between the anode of controllable silicon V6 and negative electrode.Working properly when the leakage current detection protection circuit of supply socket/attaching plug, when not having end-of-life, homing light LED1 is bright; Otherwise; leakage current detection protection circuit cisco unity malfunction in earth leakage protective socket/plug; during end-of-life; as one of controllable silicon V6, tripping coil L1, current-limiting resistance of constituting leakage current detection protection circuit break down; when causing leakage current detection protection circuit end-of-life forfeiture creepage protection function; because leakage protection circuit can't form the loop; the back homing light LED1 that resets does not work; pressing testing button TEST can not thread off; show leakage protection circuit end-of-life, the supply socket/attaching plug of reminding the user in time more to finish changing.
Fig. 2 is the disclosed leakage current detection protection circuit embodiment 2 physical circuit figure of the utility model; It is with the difference of embodiment 1 shown in Figure 1: the ac power input end of DC power supply links to each other with live wire HOT, the zero line WHITE of supply socket/attaching plug power input LINE.
Fig. 3 is the disclosed leakage current detection protection circuit embodiment 3 physical circuit figure of the utility model; It and Fig. 1, embodiment 1 shown in Figure 2, the difference of embodiment 2 are: in leakage current detection protection circuit, increased a timing chip DSQ (model 225 226 227).The control signal output ends of this timing chip DSQ extremely links to each other with the control of controllable silicon V6; (can artificially set) just exports a control signal at interval at regular intervals; make controllable silicon V6 conducting; there is electric current to flow through in the tripping coil L1; produce magnetic field; make its built-in iron core action; thereby make reset button RESET dropout/tripping operation; the K switch 1, the K2 that link with reset button RESET in deenergization plug/supply socket master current supply circuit; make supply socket/attaching plug not have power supply output, detect supply socket/attaching plug and whether still have creepage protection function.
Fig. 4 is the disclosed leakage current detection protection circuit embodiment 4 physical circuit figure of the utility model; It is with the difference of embodiment 3 shown in Figure 3: the ac power input end of DC power supply links to each other with live wire HOT, the zero line WHITE of supply socket/attaching plug power input LINE.
Fig. 5 is the disclosed leakage current detection protection circuit embodiment 5 physical circuit figure of the utility model.The difference of it and Fig. 3, embodiment 3,4 shown in Figure 4 is: this leakage current detection protection circuit has increased and need not to operate any parts just can whether still have the function that creepage protection function detected and showed testing result to supply socket/attaching plug automatically after the power input of attaching plug/supply socket and the power line in the wall connect.
As shown in Figure 5, the control utmost point of controllable silicon V6 is by current-limiting resistance R3, R1, diode V5, link to each other with the live wire of power input with the K switch 1 that is connected in the main circuit power supply of reset button RESET interlock.
After the power input LINE of attaching plug/supply socket and the power line in the wall connect, under the state of not operating any parts, reset button RESET is in trip status, be in off-state with the K switch 1 that is connected in the main circuit power supply of reset button RESET interlock, the control utmost point of controllable silicon V6 links to each other with the live wire HOT of power input LINE by current-limiting resistance R3, R1, K switch 1, the control of controllable silicon V6 is high level very, controllable silicon V6 conducting.The loop conducting that DC power supply, tripping coil L1, controllable silicon V6 series connection form; there is electric current to flow through in the tripping coil L1; produce magnetic field; its built-in iron core action; at this moment, push reset button RESET, reset button RESET can reset; illustrate that the supply socket/attaching plug with creepage protection function does not have end-of-life, all are working properly.At this moment, if push reset button RESET, after reset button resetted, with K switch 1, the K2 closure of reset button interlock, the control utmost point of controllable silicon V6 and the live wire of power input disconnected, the Lock-out of simulation leakage current.
As shown in Figure 5, the utility model is connected with one and is used to represent whether supply socket/attaching plug has the power supply output indicator LED2 of power supply output between supply socket/attaching plug load-side LOAD power firestreak HOT, zero line WHITE.When supply socket/attaching plug had power supply output, LED2 was bright; Otherwise LED2 does not work.
Fig. 6 is the disclosed leakage current detection protection circuit embodiment 6 physical circuit figure of the utility model; It is with the difference of embodiment 5 shown in Figure 5: the ac power input end of DC power supply links to each other with live wire HOT, the zero line WHITE of supply socket/attaching plug power input LINE.
In the leakage current detection protection circuit of Fig. 1～shown in Figure 6, be parallel with an anti-interference capacitor C 1 between the control utmost point of controllable silicon C1 and the ground, be used for suppressing the generation of false triggering.
In sum, the disclosed leakage protection circuit of the utility model has following outstanding advantage:
(1), whether the utility model charged by detecting supply socket/attaching plug power supply output line screen, judges whether supply socket/attaching plug exists leak current fault, so, circuit essence, letter, stable and reliable for performance.
(2), have regularly/regularly detect supply socket/attaching plug and whether still have creepage protection function, the function of end-of-life whether.
(3) after the power line in supply socket/attaching plug power input and the wall connects, need not to operate any parts, just can detect it and whether still have the i.e. end-of-life whether of creepage protection function, and show testing result.
(4), the defencive function that has the destruction that anti-lightning strike and instantaneous pressure that other reasons causes causes supply socket/attaching plug.
(5) has manual detection and show the function of testing result.
The above is specific embodiment of the utility model and the know-why used, and is any based on the equivalent transformation on the technical solutions of the utility model basis, all belongs within the utility model protection range.
Claims (10)
1. leakage current detection protection circuit, it is characterized in that: this leakage current detection protection circuit comprises rectification circuit, current-limiting resistance, controllable silicon, is built-in with the tripping coil of iron core;
Rectification circuit, the tripping coil that is built-in with iron core, controllable silicon are one another in series and form the loop;
The silicon controlled control utmost point links to each other by the screen of current-limiting resistance with supply socket/attaching plug power supply output line;
After having electric current to flow through in the tripping coil, produce magnetic field in the tripping coil, its built-in iron core action is threaded off reset button.
2. leakage current detection protection circuit according to claim 1 is characterized in that: the described silicon controlled control utmost point also links to each other with power firestreak by the Test Switchboard under current-limiting resistance, the manual test button, forms and manually produces simulation leakage current circuit.
3. leakage current detection protection circuit according to claim 1 and 2 is characterized in that: this leakage current detection protection circuit also includes a timing chip;
The control signal output ends of this timing chip extremely links to each other with described silicon controlled control, just exports a control signal at interval at regular intervals, makes the controllable silicon conducting, and whether cycle detection supply socket/attaching plug still has creepage protection function.
4. leakage current detection protection circuit according to claim 3 is characterized in that: whether this leakage current detection protection circuit need not to operate any parts just can still have creepage protection function to supply socket/attaching plug automatically and detect;
The described silicon controlled control utmost point is by current-limiting resistance, link to each other with the live wire of power input with the switch that is connected in the main circuit power supply of reset button interlock;
After the power input of attaching plug/supply socket and the power line in the wall connect, under the state of not operating any parts, reset button is in trip status, be in off-state with the switch that is connected in the main circuit power supply of reset button interlock, the silicon controlled control utmost point is by current-limiting resistance, link to each other with the live wire of power input with the switch that is connected in the main circuit power supply of reset button interlock; After reset button resetted, with the switch closure of reset button interlock, the live wire of the silicon controlled control utmost point and power input disconnected.
5. according to claim 1 or 2 or 4 described leakage current detection protection circuits, it is characterized in that: described rectification circuit is the bridge diode rectification circuit, and its ac power input end links to each other with the supply socket/power firestreak of attaching plug load-side, zero line.
6. according to claim 1 or 2 or 4 described leakage current detection protection circuits, it is characterized in that: described rectification circuit is the bridge diode rectification circuit, and its ac power input end links to each other with power firestreak, the zero line of supply socket/attaching plug power supply input side.
7. leakage current detection protection circuit according to claim 5 is characterized in that: this leakage current detection protection circuit also comprises the discharge metal sheet of two that be used to discharge, right angle trigonometry shapes;
Described discharge metal sheet is connected to supply socket/attaching plug power input live wire, zero line place, and the discharge metal sheet tip of two right angle trigonometry shapes is staggered relatively, and keeps certain intervals.
8. leakage current detection protection circuit according to claim 6 is characterized in that: this leakage current detection protection circuit also comprises the discharge metal sheet of two that be used to discharge, right angle trigonometry shapes;
Described discharge metal sheet is connected to supply socket/attaching plug power input live wire, zero line place, and the discharge metal sheet tip of two right angle trigonometry shapes is staggered relatively, and keeps certain intervals.
9. according to claim 7 or 8 described leakage current detection protection circuits, it is characterized in that: be parallel with the piezo-resistance that is used to prevent electrophoresis at described silicon controlled two ends.
10. leakage current detection protection circuit according to claim 9 is characterized in that: be connected with one and be used to represent the whether homing light of end-of-life of supply socket/attaching plug in described controllable silicon conducting loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820079932XU CN201194327Y (en) | 2008-04-14 | 2008-04-14 | Leakage detecting protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820079932XU CN201194327Y (en) | 2008-04-14 | 2008-04-14 | Leakage detecting protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN201194327Y true CN201194327Y (en) | 2009-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU200820079932XU Expired - Fee Related CN201194327Y (en) | 2008-04-14 | 2008-04-14 | Leakage detecting protection circuit |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208798A (en) * | 2010-03-29 | 2011-10-05 | 黄华道 | Novel electricity-saving protection circuit with electric leakage detection function |
| CN102255277A (en) * | 2010-05-18 | 2011-11-23 | 黄华道 | Leakage detection protection circuit |
| CN102332700A (en) * | 2011-09-14 | 2012-01-25 | 黄华道 | Anti-lightning leakage detection and protection circuit |
| CN102611071A (en) * | 2011-01-25 | 2012-07-25 | 黄华道 | Electric leakage detecting protecting circuit with magnetic locking mechanism |
| CN102832591A (en) * | 2011-06-17 | 2012-12-19 | 黄华道 | Electricity leakage detecting protection circuit with function of lightning impulse resistance |
| CN106571617A (en) * | 2016-10-14 | 2017-04-19 | 无锡市海升电子科技有限公司 | Leakage protector capable of carrying out leakage detection automatically |
| CN114720790A (en) * | 2021-01-04 | 2022-07-08 | 明泰科技股份有限公司 | Circuit for confirming high energy damage |
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2008
- 2008-04-14 CN CNU200820079932XU patent/CN201194327Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208798A (en) * | 2010-03-29 | 2011-10-05 | 黄华道 | Novel electricity-saving protection circuit with electric leakage detection function |
| CN102208797A (en) * | 2010-03-29 | 2011-10-05 | 黄华道 | Novel protection circuit with electric leakage detection function |
| CN102208798B (en) * | 2010-03-29 | 2014-04-02 | 黄华道 | Novel electricity-saving protection circuit with electric leakage detection function |
| CN102255277A (en) * | 2010-05-18 | 2011-11-23 | 黄华道 | Leakage detection protection circuit |
| CN102611071A (en) * | 2011-01-25 | 2012-07-25 | 黄华道 | Electric leakage detecting protecting circuit with magnetic locking mechanism |
| CN102611071B (en) * | 2011-01-25 | 2015-05-20 | 黄华道 | Electric leakage detecting protecting circuit with magnetic locking mechanism |
| CN102832591A (en) * | 2011-06-17 | 2012-12-19 | 黄华道 | Electricity leakage detecting protection circuit with function of lightning impulse resistance |
| CN102332700A (en) * | 2011-09-14 | 2012-01-25 | 黄华道 | Anti-lightning leakage detection and protection circuit |
| CN102332700B (en) * | 2011-09-14 | 2014-01-08 | 黄华道 | Anti-lightning leakage detection and protection circuit |
| CN106571617A (en) * | 2016-10-14 | 2017-04-19 | 无锡市海升电子科技有限公司 | Leakage protector capable of carrying out leakage detection automatically |
| CN106571617B (en) * | 2016-10-14 | 2019-02-05 | 安徽伊法拉电力科技有限公司 | A kind of earth leakage protective device that can carry out detection of electrical leakage automatically |
| CN114720790A (en) * | 2021-01-04 | 2022-07-08 | 明泰科技股份有限公司 | Circuit for confirming high energy damage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090211 Termination date: 20130414 |