CN204732849U - A kind of residual current circuit breaker - Google Patents
A kind of residual current circuit breaker Download PDFInfo
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- CN204732849U CN204732849U CN201520354447.9U CN201520354447U CN204732849U CN 204732849 U CN204732849 U CN 204732849U CN 201520354447 U CN201520354447 U CN 201520354447U CN 204732849 U CN204732849 U CN 204732849U
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Abstract
The utility model discloses a kind of residual current circuit breaker, comprise transformer T, electric capacity C1, inductance L 4, key switch S1, relay J, diode D1, piezo-resistance RV and one-way SCR VS, piezo-resistance RV one end connects 220V respectively and exports one end, relay J coil, transformer T coil L2 and resistance R1, the resistance R1 other end connects key switch S1, the key switch S1 other end connects relay J contact J-1 and transformer T coil L1 respectively, the transformer T coil L1 other end connects the piezo-resistance RV other end respectively, 220V exports the other end, transformer T coil L3, electric capacity C1, inductance L 4, resistance R2, diode D1 positive pole, diode D2 negative pole, the K pole of resistance R3 and one-way SCR VS.The utility model residual current circuit breaker stability is high, and when there is electric leakage or overvoltage, can cut off rapidly 220V AC power, fail safe is high, and circuit structure is simple, and antijamming capability is strong.
Description
Technical field
The utility model relates to a kind of circuit breaker, specifically a kind of residual current circuit breaker.
Background technology
In electric device, electric current flows to load from power supply, then flows back to power supply.In the ideal situation, the electric current flowing to load equals the electric current flowing back to power supply.In actual applications, flow to the electric current of load and be called as residual current from the difference between currents in load flow telegram in reply source.When there is earth fault, current direction the earth, thus also produce residual current.Electrical installation produces residual current, that is to say usually said electric leakage, the safe current that human body can bear, when 220V, is about 20 ~ below 30mA.
Normally run to make electric device; proterctive equipment and personal safety; usually earth leakage protective device is set in circuit; earth leakage protective device can arrange electric leakage trip threshold; when leakage current reaches trip threshold, earth leakage protective device can cause circuit to disconnect, and the trip threshold that existing a lot of earth leakage protective device is arranged is all higher; there is certain potential safety hazard, and expensive, wiring is complicated.
Utility model content
The purpose of this utility model is to provide a kind of circuit structure simple residual current circuit breaker, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of residual current circuit breaker, comprises transformer T, electric capacity C1, inductance L 4, key switch S1, relay J, diode D1, piezo-resistance RV and one-way SCR VS, described piezo-resistance RV one end connects 220V respectively and exports one end, relay J coil, transformer T coil L2 and resistance R1, the resistance R1 other end connects key switch S1, and the key switch S1 other end connects relay J contact J-1 and transformer T coil L1 respectively, and the transformer T coil L1 other end connects the piezo-resistance RV other end respectively, 220V exports the other end, transformer T coil L3, electric capacity C1, inductance L 4, resistance R2, diode D1 positive pole, diode D2 negative pole, the K pole of resistance R3 and one-way SCR VS, the described transformer T coil L2 other end connects 220V and inputs one end, 220V inputs the other end and connects the relay J contact J-1 other end, the described relay J coil other end connects diode D3 positive pole, diode D3 negative pole connects A pole and the electric capacity C2 of one-way SCR VS respectively, the electric capacity C2 other end contact resistance R3 other end, the G pole of described one-way SCR VS connects diode D2 positive pole respectively, diode D1 negative pole, the resistance R2 other end, inductance L 4 other end, the electric capacity C1 other end and the transformer T coil L3 other end.
As further program of the utility model: described one-way SCR VS model is TL431.
As the utility model further scheme: described relay J contact J-1 is normally-closed contact.
Compared with prior art, the beneficial effects of the utility model are: the utility model residual current circuit breaker stability is high, and when there is electric leakage or overvoltage, can cut off rapidly 220V AC power, fail safe is high, and circuit structure is simple, and antijamming capability is strong.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of residual current circuit breaker.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of residual current circuit breaker, comprises transformer T, electric capacity C1, inductance L 4, key switch S1, relay J, diode D1, piezo-resistance RV and one-way SCR VS, piezo-resistance RV one end connect 220V respectively and export one end, relay J coil, transformer T coil L2 and resistance R1, the resistance R1 other end connects key switch S1, and the key switch S1 other end connects relay J contact J-1 and transformer T coil L1 respectively, and the transformer T coil L1 other end connects the piezo-resistance RV other end respectively, 220V exports the other end, transformer T coil L3, electric capacity C1, inductance L 4, resistance R2, diode D1 positive pole, diode D2 negative pole, the K pole of resistance R3 and one-way SCR VS, the transformer T coil L2 other end connects 220V and inputs one end, 220V inputs the other end and connects the relay J contact J-1 other end, the relay J coil other end connects diode D3 positive pole, diode D3 negative pole connects A pole and the electric capacity C2 of one-way SCR VS respectively, the electric capacity C2 other end contact resistance R3 other end, the G pole of one-way SCR VS connects diode D2 positive pole respectively, diode D1 negative pole, the resistance R2 other end, inductance L 4 other end, the electric capacity C1 other end and the transformer T coil L3 other end.
One-way SCR VS model is TL431.
Relay J contact J-1 is normally-closed contact.
Operation principle of the present utility model is: refer to Fig. 1, under normal circumstances, transformer T coil L1, the size of current equal direction of L2 is contrary, cancel out each other in the magnetic field produced, transformer T coil L3 magnetic flux is zero, non-inductive voltage exports, one-way SCR VS ends, relay J coil no current flows through, residual current circuit breaker is normally to 220V input load supplying, when there is electric leakage in load, transformer T coil L1, L2 electric current is no longer equal, transformer T coil L3 produces induced voltage, this voltage triggered one-way SCR VS conducting, diode D3 halfwave rectifier makes relay J coil conduct, relay J contact J-1 disconnects, play leakage protection.
In circuit, form hookup, press S1 by button S2, current-limiting resistance R1, not etc., relay J contact J-1 does not disconnect analogue transformer T coil L1, L2 electric current immediately, whether working properly by this inspection residual current circuit breaker.Form double limiting circuit by diode D1 and diode D2, make transformer T coil L3 output voltage be limited in 1.4V, the trigger end of protection one-way SCR VS is not by instantaneous pressure impact failure.Be connected in parallel on transformer T coil L3 two ends by electric capacity C1, C2 and form complete machine anti-jamming circuit, improve complete machine interference free performance, prevent misoperation, form anti-jamming circuit by electric capacity C2, resistance R3, and protect one-way SCR VS to a certain extent.Be connected in parallel on 220V output by piezo-resistance RV and form overvoltage crowbar, when there is overvoltage because of certain reason in mains supply voltage, power consumption equipment not damage by overvoltage.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (3)
1. a residual current circuit breaker, comprises transformer T, electric capacity C1, inductance L 4, key switch S1, relay J, diode D1, piezo-resistance RV and one-way SCR VS, is characterized in that, described piezo-resistance RV one end connects 220V respectively and exports one end, relay J coil, transformer T coil L2 and resistance R1, the resistance R1 other end connects key switch S1, and the key switch S1 other end connects relay J contact J-1 and transformer T coil L1 respectively, and the transformer T coil L1 other end connects the piezo-resistance RV other end respectively, 220V exports the other end, transformer T coil L3, electric capacity C1, inductance L 4, resistance R2, diode D1 positive pole, diode D2 negative pole, the K pole of resistance R3 and one-way SCR VS, the described transformer T coil L2 other end connects 220V and inputs one end, 220V inputs the other end and connects the relay J contact J-1 other end, the described relay J coil other end connects diode D3 positive pole, diode D3 negative pole connects A pole and the electric capacity C2 of one-way SCR VS respectively, the electric capacity C2 other end contact resistance R3 other end, the G pole of described one-way SCR VS connects diode D2 positive pole respectively, diode D1 negative pole, the resistance R2 other end, inductance L 4 other end, the electric capacity C1 other end and the transformer T coil L3 other end.
2. residual current circuit breaker according to claim 1, is characterized in that, described one-way SCR VS model is TL431.
3. residual current circuit breaker according to claim 1, is characterized in that, described relay J contact J-1 is normally-closed contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520354447.9U CN204732849U (en) | 2015-05-28 | 2015-05-28 | A kind of residual current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520354447.9U CN204732849U (en) | 2015-05-28 | 2015-05-28 | A kind of residual current circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204732849U true CN204732849U (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520354447.9U Expired - Fee Related CN204732849U (en) | 2015-05-28 | 2015-05-28 | A kind of residual current circuit breaker |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114867190A (en) * | 2022-05-16 | 2022-08-05 | 东莞市巨臣电子科技有限公司 | Protection module, PCB board and keyboard |
-
2015
- 2015-05-28 CN CN201520354447.9U patent/CN204732849U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114867190A (en) * | 2022-05-16 | 2022-08-05 | 东莞市巨臣电子科技有限公司 | Protection module, PCB board and keyboard |
| CN114867190B (en) * | 2022-05-16 | 2024-02-09 | 东莞市巨臣电子科技有限公司 | Protection module, PCB and keyboard |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151028 Termination date: 20160528 |