CN200956048Y - Leakage detecting aircuit - Google Patents
Leakage detecting aircuit Download PDFInfo
- Publication number
- CN200956048Y CN200956048Y CN 200620133836 CN200620133836U CN200956048Y CN 200956048 Y CN200956048 Y CN 200956048Y CN 200620133836 CN200620133836 CN 200620133836 CN 200620133836 U CN200620133836 U CN 200620133836U CN 200956048 Y CN200956048 Y CN 200956048Y
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- attaching plug
- electric
- resistance
- rectifier bridge
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Abstract
The utility model discloses an earth detector circuit, including a thyristor, a bridge rectifier of diode, a winding with trip core inside, resistances and capacitances. The controlgate of the thyristor connects with the metallic shielding layer of the power cord by the resistance. The anode of the thyristor connects with the positive volts d.c. fun-out of the bridge rectifier, and the cathode connects with the negative d.c. fun-out. One side of the winding with trip core inside connects with the live line or null line of the power cable, and another side connects with one AC input of bridge rectifier. Another AC input of bridge rectifier connects with the null line or live line of the power cable. If the core wire of power cable emerges and creeps because of aging or dilapidation, the shielding layer, the resistance and the diode are capable of engendering a positive voltage drop by forming a loop and triggering the breakover of the thyristor. The trip winding produces magnetic field by the passing current, moves the trip core inside the winding and cuts off the power export of the power plug.
Description
Technical field
The utility model relates to a kind of being installed in the attaching plug, is used to detect whether attaching plug exists leaky to the power lead between the electrical appliance electric-leakage detection circuit.
Background technology
At present, common household electrical appliance such as air-conditioning, washing machine, refrigerator etc. all carry about one 1 meter or longer power lead, and its attaching plug by its end links to each other with charged supply socket in the wall, for electrical appliance provides working power.
The power lead that this root links to each other with household electrical appliance in use may be because of aging, or wear and tear in moving process, causes the slight electric leakage of live wire, the neutral line, ground wire, produces electric spark, thereby cause fire, makes the user be subjected to the loss of personal property.Therefore, generation for fear of this situation, one electric-leakage detection circuit should be set in the attaching plug of power lead end, detect in real time attaching plug to the power lead between the electrical appliance whether exist because of electric wire aging or move in the exposed leaky that is produced of electric wire heart yearn that causes of wearing and tearing, the plug main circuit of in time cutting off the electricity supply output, avoid fire, this is very necessary.Yet, at present most and the attaching plug that electrical appliance links to each other such electric-leakage detection circuit is not installed.
Summary of the invention
In view of the foregoing, the purpose of this utility model provide a kind of be installed in the attaching plug, be used to detect whether attaching plug exists leaky to the power lead between the electrical appliance electric-leakage detection circuit.
For achieving the above object, the utility model is taked following design proposal: a kind of electric-leakage detection circuit is characterized in that: it is made up of controllable silicon, diode rectifier bridge, the coil that is built-in with the dropout iron core, resistance and electric capacity;
The silicon controlled control utmost point links to each other with the metal screen layer of power lead by resistance; The silicon controlled anode links to each other with the dc voltage output end positive pole (+) of diode rectifier bridge; The silicon controlled negative electrode links to each other with the dc voltage output end negative pole (-) of diode rectifier bridge; Between the silicon controlled control utmost point and negative electrode, be parallel with resistance and an electric capacity;
Be built-in with an end and the attaching plug power input of the coil of dropout iron core/or the live wire of load output terminal/or zero line link to each other, the other end links to each other with an ac input end of diode rectifier bridge, another ac input end of diode rectifier bridge and attaching plug power input/or the zero line of load output terminal/or live wire link to each other.
This electric-leakage detection circuit also comprises a display circuit, and this display circuit is made of the current-limiting resistance and the pilot lamp of series connection; One end of display circuit and the live wire of attaching plug load output terminal/or zero line link to each other, the other end links to each other with diode rectifier bridge dc voltage output end negative pole (-).
Described display circuit can also be made of current-limiting resistance, pilot lamp and the diode of series connection; This display circuit is connected in parallel between attaching plug load output terminal live wire and the zero line.
This electric-leakage detection circuit also includes a leakage current simulation test circuit, and it is made up of simulation test switch and resistance; One end of simulation test switch extremely links to each other with silicon controlled control by resistance, and the other end links to each other with the live wire of attaching plug input end or output terminal.
The utility model has the advantages that: simple in structure, easy to operate, can detect the attaching plug power lead real-time because of the aging or damaged leak current fault that causes, the power supply output of the timely plug of cutting off the electricity supply apace, avoid effectively because of the plug-in power pack output line leaks electricity to the damage that consumer caused, and the electric shock injury because of leaking electricity user's person being caused.
Description of drawings
Fig. 1 is the physical circuit figure of the utility model electric-leakage detection circuit;
Fig. 2 is another physical circuit figure of the utility model electric-leakage detection circuit;
Fig. 3 is the another physical circuit figure of the utility model electric-leakage detection circuit;
Fig. 4 is a physical circuit figure again of the utility model electric-leakage detection circuit.
Embodiment
As shown in Figure 1, the disclosed electric-leakage detection circuit of the utility model mainly is made up of controllable silicon SCR, diode rectifier bridge D1～D4, the coil SOL that is built-in with the dropout iron core, resistance R 3, R5 and capacitor C 2.
The control utmost point of controllable silicon SCR links to each other with the metal screen layer L of power lead by resistance R 5; The anode of controllable silicon SCR links to each other with the dc voltage output end positive pole (+) of diode rectifier bridge; The negative electrode of controllable silicon SCR links to each other with the dc voltage output end negative pole (-) of diode rectifier bridge.Between the control utmost point of controllable silicon SCR and negative electrode, be parallel with a resistance R 3 and a capacitor C 2.
An end that is built-in with the coil SOL of dropout iron core links to each other with the live wire HOT of attaching plug load output terminal LOAD, the other end links to each other with the ac input end of diode rectifier bridge D1～D4, and another ac input end of diode rectifier bridge D1～D4 links to each other with the zero line WHITE of attaching plug load output terminal LOAD.
When with power lead that attaching plug links to each other in live wire HOT or neutral line WHITE when having leaky, screen layer L is charged, screen layer L then, resistance R 5, R3, diode rectifier bridge forms the loop, on resistance R 3, produce pressure drop, trigger the controllable silicon SCR conducting, there is electric current to flow through among the tripping coil SOL, produce magnetic field, make the dropout iron core action that is built among the tripping coil SOL, make the reset button RESET escape that is connected in the attaching plug supply line, the cut off the electricity supply power supply output of plug, stopping is the electrical appliance power supply, thereby avoids that the aging or exposed electric leakage of damaged heart yearn produces the fire that electric spark causes because of power lead.
When with power lead that attaching plug links to each other in live wire HOT or neutral line WHITE when not having leaky, controllable silicon SCR is controlled very low level because of it can conducting, there is not electric current to flow through among the tripping coil SOL, there is not magnetic field to produce, its built-in dropout iron core is failure to actuate the attaching plug operate as normal.
For the duty of display power supply socket, as shown in Figure 1, the utility model also comprises a display circuit, and this display circuit is made of the current-limiting resistance R1 and the pilot lamp LED of series connection; One end of display circuit links to each other with the live wire HOT of attaching plug load output terminal LOAD, and the other end links to each other with diode rectifier bridge dc voltage output end negative pole (-).When there is not leaky in the attaching plug power lead, be connected on the reset button RESET closure in the attaching plug supply line, attaching plug has power supply output, and resistance R 1, LED, D3 form the loop, and pilot lamp LED is bright, and expression attaching plug power lead is intact; When there was leaky in the attaching plug power lead, above-mentioned electric-leakage detection circuit made the reset button RESET escape that is connected in the attaching plug supply line, the power supply output of the plug of cutting off the electricity supply, and LED does not work, and expression attaching plug power lead is bad.
Fig. 2 is another physical circuit figure of the utility model electric-leakage detection circuit.The difference of electric-leakage detection circuit shown in Figure 2 and electric-leakage detection circuit shown in Figure 1 is:
1, an end that is built-in with the coil SOL of dropout iron core links to each other with the zero line WHITE of attaching plug load output terminal LOAD, the other end links to each other with the ac input end of diode rectifier bridge D1～D4, and another ac input end of diode rectifier bridge D1～D4 links to each other with the live wire HOT of attaching plug load output terminal LOAD.
2, an end of display circuit links to each other with the zero line WHITE of attaching plug load output terminal LOAD, and the other end links to each other with diode rectifier bridge dc voltage output end negative pole (-).
Its principle of work and circuit shown in Figure 1 are identical.
Fig. 3 is the another physical circuit figure of the utility model electric-leakage detection circuit.The difference of electric-leakage detection circuit shown in Figure 3 and electric-leakage detection circuit shown in Figure 1 is:
1, an end that is built-in with the coil SOL of dropout iron core links to each other with the zero line WHITE of attaching plug power input LINE, the other end links to each other with the ac input end of diode rectifier bridge D1～D4, and another ac input end of diode rectifier bridge D1～D4 links to each other with the live wire HOT of attaching plug power input LINE.
2, the pilot lamp LED that is used for display power supply plug state is connected in parallel between attaching plug load output terminal live wire HOT and the zero line WHITE with after current-limiting resistance R1 connects.
Its principle of work is:
When there are leaky in the live wire HOT in the attaching plug power lead or neutral line WHITE, screen layer L is charged, then screen layer L, resistance R 5, R3, diode rectifier bridge form the loop, on resistance R 3, produce pressure drop, trigger the controllable silicon SCR conducting, there is electric current to flow through among the tripping coil SOL, produce magnetic field, make the dropout iron core action that is built among the tripping coil SOL, make the reset button RESET escape that is connected in the attaching plug supply line, the cut off the electricity supply power supply output of plug, stopping is the electrical appliance power supply.
When there are not leaky in the live wire HOT in the attaching plug power lead or neutral line WHITE, controllable silicon SCR is controlled very low level because of it can conducting, does not have electric current to flow through among the tripping coil SOL, does not have magnetic field to produce, its built-in dropout iron core is failure to actuate the attaching plug operate as normal.
The principle of work of display circuit: when there is not leaky in the attaching plug power lead, be connected on the reset button RESET closure in the attaching plug supply line, attaching plug has power supply output, and resistance R 1, LED, D5 form the loop, pilot lamp LED is bright, and expression attaching plug power lead is intact; When there was leaky in the attaching plug power lead, above-mentioned electric-leakage detection circuit made the reset button RESET escape that is connected in the attaching plug supply line, the power supply output of the plug of cutting off the electricity supply, and pilot lamp LED does not work, and expression attaching plug power lead is bad.
Fig. 4 is the another physical circuit figure of the utility model electric-leakage detection circuit.Electric-leakage detection circuit shown in Figure 4 with the difference of electric-leakage detection circuit shown in Figure 3 is: an end that is built-in with the coil SOL of dropout iron core links to each other with the live wire HOT of attaching plug power input LINE, the other end links to each other with the ac input end of diode rectifier bridge D1～D4, and another ac input end of diode rectifier bridge D1～D4 links to each other with the zero line WHITE of attaching plug power input LINE.
Its principle of work and circuit shown in Figure 3 are identical.
As Fig. 1～shown in Figure 4, the utility model electric-leakage detection circuit also includes a leakage current simulation test circuit, and this circuit is made up of simulation test switch TEST and resistance R 4.The end of simulation test switch TEST extremely links to each other with the control of controllable silicon SCR by resistance R 4, and the other end links to each other with the live wire HOT of attaching plug input end LINE or output terminal LOAD.If the electric-leakage detection circuit in the attaching plug is intact; attaching plug has creepage protection function; after pushing simulation test switch TEST and making it closure; power firestreak HOT voltage is directly extremely gone up by the control that resistance R 4 is added in controllable silicon SCR; the SCR conducting; there is electric current to flow through among the tripping coil SOL; produce magnetic field; be built in the dropout iron core action among the tripping coil SOL; just can make the reset button RESET escape that is connected in the attaching plug supply line; the cut off the electricity supply power supply output of plug, stopping is the electrical appliance power supply.If the electric-leakage detection circuit in the attaching plug lost efficacy, attaching plug does not have creepage protection function, and after then pushing simulation test switch TEST and making it closure, reset button RESET is escape not all the time, and attaching plug still has electric power output.
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 domain.
Claims (4)
1, a kind of electric-leakage detection circuit is characterized in that: (D1～D4), the coil (SOL), resistance (R3, R5) and the electric capacity (C2) that are built-in with the dropout iron core are formed by controllable silicon (SCR), diode rectifier bridge for it;
The control utmost point of controllable silicon (SCR) links to each other with the metal screen layer (L) of power lead by resistance (R5); The anode of controllable silicon (SCR) links to each other with the dc voltage output end positive pole (+) of diode rectifier bridge; The negative electrode of controllable silicon (SCR) links to each other with the dc voltage output end negative pole (-) of diode rectifier bridge; Between the control utmost point of controllable silicon (SCR) and negative electrode, be parallel with resistance (R3) and an electric capacity (C2);
Be built-in with an end and the attaching plug power input (LINE) of the coil (SOL) of dropout iron core/or the live wire (HOT) of load output terminal (LOAD)/or zero line (WHITE) link to each other, the other end and diode rectifier bridge (ac input end of D1～D4) links to each other, diode rectifier bridge (another ac input end of D1～D4) and attaching plug power input (LINE)/or the zero line (WHITE) of load output terminal (LOAD)/or live wire (HOT) link to each other.
2, a kind of electric-leakage detection circuit according to claim 1, it is characterized in that: it also comprises a display circuit, this display circuit is made of the current-limiting resistance (R1) and the pilot lamp (LED) of series connection;
The live wire (HOT) of one end of display circuit and attaching plug load output terminal (LOAD)/or zero line (WHITE) link to each other, the other end links to each other with diode rectifier bridge dc voltage output end negative pole (-).
3, a kind of electric-leakage detection circuit according to claim 1, it is characterized in that: it also comprises a display circuit, this display circuit is made of current-limiting resistance (R1), pilot lamp (LED) and the diode (D5) of series connection;
This display circuit is connected in parallel between attaching plug load output terminal live wire (HOT) and the zero line (WHITE).
4, according to the described a kind of electric-leakage detection circuit of one of claim 1～3, it is characterized in that: this electric-leakage detection circuit also includes a leakage current simulation test circuit, and it is made up of simulation test switch (TEST) and resistance (R4);
One end of simulation test switch (TEST) extremely links to each other with the control of controllable silicon (SCR) by resistance (R4), and the other end links to each other with the live wire (HOT) of attaching plug input end (LINE) or output terminal (LOAD).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620133836 CN200956048Y (en) | 2006-09-20 | 2006-09-20 | Leakage detecting aircuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620133836 CN200956048Y (en) | 2006-09-20 | 2006-09-20 | Leakage detecting aircuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200956048Y true CN200956048Y (en) | 2007-10-03 |
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ID=38774635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620133836 Expired - Lifetime CN200956048Y (en) | 2006-09-20 | 2006-09-20 | Leakage detecting aircuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN200956048Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884950A (en) * | 2012-12-20 | 2014-06-25 | 东莞钜威新能源有限公司 | Electric-leakage detection system and electric-leakage detection method of energy-storage power station |
| CN103959078A (en) * | 2011-11-03 | 2014-07-30 | 伊莱克斯家用产品股份有限公司 | Ground power leakage detection for peripheral printed circuit boards |
| CN104808101A (en) * | 2015-04-29 | 2015-07-29 | 苏州华徕光电仪器有限公司 | Audio cable detection circuit |
| WO2022087961A1 (en) * | 2020-10-29 | 2022-05-05 | 深圳市大疆创新科技有限公司 | Power supply control method and apparatus, and electric device |
-
2006
- 2006-09-20 CN CN 200620133836 patent/CN200956048Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103959078A (en) * | 2011-11-03 | 2014-07-30 | 伊莱克斯家用产品股份有限公司 | Ground power leakage detection for peripheral printed circuit boards |
| CN103884950A (en) * | 2012-12-20 | 2014-06-25 | 东莞钜威新能源有限公司 | Electric-leakage detection system and electric-leakage detection method of energy-storage power station |
| CN104808101A (en) * | 2015-04-29 | 2015-07-29 | 苏州华徕光电仪器有限公司 | Audio cable detection circuit |
| CN104808101B (en) * | 2015-04-29 | 2017-12-19 | 苏州华徕光电仪器有限公司 | A kind of detection circuit for voice-frequency cable |
| WO2022087961A1 (en) * | 2020-10-29 | 2022-05-05 | 深圳市大疆创新科技有限公司 | Power supply control method and apparatus, and electric device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071003 |
|
| EXPY | Termination of patent right or utility model |