CN100583571C - Full-function secure plug - Google Patents
Full-function secure plug Download PDFInfo
- Publication number
- CN100583571C CN100583571C CN200610155460A CN200610155460A CN100583571C CN 100583571 C CN100583571 C CN 100583571C CN 200610155460 A CN200610155460 A CN 200610155460A CN 200610155460 A CN200610155460 A CN 200610155460A CN 100583571 C CN100583571 C CN 100583571C
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- Prior art keywords
- diode
- zero
- plug
- circuit
- ground wire
- Prior art date
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- Expired - Fee Related
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 18
- 229910052710 silicon Inorganic materials 0.000 claims description 18
- 239000010703 silicon Substances 0.000 claims description 18
- 239000012212 insulator Substances 0.000 claims description 2
- 230000003321 amplification Effects 0.000 abstract description 5
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 description 8
- 230000001681 protective effect Effects 0.000 description 5
- 238000009841 combustion method Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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Abstract
The related all-purpose safe plug comprises: three poles every with switch; between phase and zero line, a zero-sequence current transformer, a test loop, an amplification circuit, a dc power, and a release device; a ground line connected by a movable contact spring and a fixed point; another zero-sequence current transformer in the ground line with secondary output end paralleled with another amplification circuit whose output serial connects with the trigger electrode of a thyristor. This invention can prevent electrification of three phase lines and over-temperature of plug self.
Description
Technical field
The present invention relates to a kind of attaching plug, particularly relate to a kind of can fire line, zero line, ground wire electrification can prevent the safety plug of overtemperature again.
Background technology
Disclosed a kind of all-purpose leakage protection plug among the Chinese patent literature CN1142618C; in the power line ground wire, be provided with the ground wire electrified detection inductor; in phase; be provided with zero sequence current mutual inductor between the zero line; and plug inside phase; zero; be equipped with a pair of contact between ground wire and the breaker; be connected to spring between breaker upper end and the ground wire moving contact copper reed; make a pair of contact of ground wire have a spring force of inhaling mutually all the time; when moving, realizes by the trip free device connecting earlier ground wire; phase is connected in the back; the zero line or the first phase failure; zero line; the disconnected ground wire in back; thereby satisfy the safety utilization of electric power requirement; but there is following shortcoming: 1; phase; when the zero-sequence mutual inductance coil of zero line breaks down; for example break etc.; the zero-sequence mutual inductance coil of ground wire just can not work, the purpose that can in time cut off in the time of therefore also can't reaching ground wire electrification.2, owing to be through between zero-sequence mutual inductance coil on zero-sequence mutual inductance coil on the ground wire and phase line, the zero line and insert same amplifier input terminal; influenced the output voltage of the zero-sequence mutual inductance coil on the ground wire; thereby influence the operating current of ground wire; operating current when making the ground wire electric leakage has surpassed the safe current that human body bears; therefore can not play a protective role, still entail dangers to people's life security.3, the zero-sequence mutual inductance coil temperature influence on the ground wire is bigger in this circuit, and its operating current can vary with temperature and acute variation, therefore can't adapt to different environments for use.4, it adopts so-called two Room to prevent the overtemperature of plug, can not effectively reach the purpose that prevents overtemperature.
The safety plug of disclosed a kind of defense sector tape electricity among the Chinese patent literature CN2609228Y that I apply for, it adopts different tripping mechanisms and the mechanism that prevents overtemperature with the aforementioned patent document, though improved fail safe, but since its ground wire with mutually, the zero sequence tripping coil of zero line still uses same amplifier, therefore also have the shortcoming similar to above-mentioned patent, fail safe is not high enough.
Summary of the invention
Technical problem to be solved by this invention is to provide safety plug at the defective of above-mentioned prior art, the purpose of stable disconnection rapidly when reaching ground wire electrification.
The present invention solves the problems of the technologies described above the technical scheme that is adopted:
Safety plug, the phase that comprises belt switch, zero, ground three utmost points, be located at phase, zero sequence current mutual inductor between the zero line, the test loop, first amplifying circuit, DC power supply, release, ground wire is connected with fixed contact by the movable contact flexure strip, be installed with zero sequence current mutual inductor in the ground wire, it is characterized in that: the secondary output end of the zero sequence current mutual inductor in the described ground wire and second amplifying circuit are connected in parallel, link to each other with the silicon controlled trigger electrode behind diode of output serial connection of second amplifying circuit, link to each other with the silicon controlled trigger electrode behind diode of output serial connection of described first amplifying circuit.
Also have temperature controller in the above-mentioned plug, its thermistor places the zero line of plug and the middle insulator of pin of phase line.
Also connect the anti-dry circuit in the above-mentioned plug.
The present invention has made full use of the protection mechanism of original phase, zero line protection plug; utilize the induction coupling of coil and produce electric principle; in ground wire, add coupling coil; and utilize original protection mechanism; with original amplifying circuit, circuits for triggering, test loop, release disengagement and close mechanism, independently ground wire zero sequence coil amplifying circuit is set also as phase, zero line.Whether have or not the residual current except that detecting between load phase, the zero line, it is charged also to detect ground wire.When zero line or ground wire broke down respectively or simultaneously, two magnetic test coils all can all disconnect phase, zero, ground wire immediately, promptly cut off the electricity supply, thereby have ensured personal safety effectively.
Compared with prior art, the invention has the advantages that:
1, the amplifying circuit of the zero-sequence transformer by independent setting and connect with diode, under the amplifier inefficacy and serviceability temperature variation situation greatly of phase, zero line, when appearance ground wire accident is charged, still can be immediately dump, thereby can stably prevent ground wire electrification, guarantee user's personal safety.
2, thermistor is placed plug between live wire and zero line; therefore the heat that produces in live wire and zero line and the socket can in time pass to thermistor; can not influence protector even the plug temperature is too high yet, more can not burn out protector, thereby more improve the fail safe of plug.
3, owing to also be provided with the anti-dry circuit in the plug, therefore in case the power load overtemperature will cut off the power supply automatically when linking to each other with power load, so can dry combustion method.
The safety plug can prevent the charged of phase, zero, ground wire and can use under various environment, can prevent the overtemperature of plug own again, can also prevent the dry combustion method of electrical appliance, has therefore become omnipotence safety plug worthy of the name.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Fig. 1 is the circuit diagram of safety plug, it comprises belt switch K1, K2, the phase of K3, zero, ground three utmost points, be located at phase, zero sequence current mutual inductor ZCT1 between the zero line, the test loop that resistance R 5 and button T form, amplifying circuit IC1, DC power supply DC, release ZK, ground wire is connected with fixed contact by the movable contact flexure strip, be installed with zero sequence current mutual inductor ZCT2 in the ground wire, the secondary output end of the zero sequence current mutual inductor in the described ground wire and another amplifying circuit IC2 are connected in parallel, and link to each other with the trigger electrode of controllable silicon SCR behind diode D2 of output serial connection of another amplifying circuit IC2.
Ground wire earth leakage protective is to increase an amplification circuit IC2 in original leakage protection circuit again in the foregoing circuit; controllable silicon SCR and DC power supply DC are shared; the output of original amplification circuit IC1 and ground wire respectively are connected in series diode D1, a D2 with the output of amplifying circuit IC2 and are connected with the trigger electrode of controllable silicon SCR; the positive pole of diode D1, D2 is connected with the output of the IC1 of amplification circuit, IC2; the negative pole of diode D1, D2 is connected with the trigger electrode of controllable silicon SCR, a capacitor C 1 in parallel between silicon controlled trigger electrode and the negative pole.
Overtemperature prote device circuit is: thermistor RT is connected with the positive source of integrated circuit (IC) 1, IC2 with resistance R 1 series connection back one end; the other end is connected with resistance R 2; the end of R2 is connected with power supply DC negative pole; be connected the positive pole of a diode D3 between resistance R 1 and thermistor RT and the resistance R 2, the negative pole of diode D3 is connected with the trigger electrode of controllable silicon SCR.
The anti-dry circuit is: a dielectric capacitance C2 in parallel and resistance R 3 between the trigger electrode of controllable silicon SCR and the negative electrode, diode D4 of controllable silicon SCR trigger electrode series connection, diode D4 negative pole links to each other with the trigger electrode of controllable silicon SCR, the positive pole of diode D4 links to each other with resistance R 4, resistance R 4 links to each other with transducer 1, one of transducer 1 is terminated at any utmost point in the current supply circuit, receives among the figure on the L line.
The sensor is the open type transducer, as long as be open-circuit condition when operate as normal, the transducer that can sport channel status when non-normal working is all available.It can be bimetal leaf, magnetic sentive switch, displacement transducer, liquid-level switch, thermal-reed switch or the like.
The sensor is connected in the electrical equipment, and when taking place to heat up in the electrical equipment, transducer just can become short circuit by open circuit like this; thereby the connection circuits for triggering make trip coil energising work, by the earth leakage protective device deenergization; thereby prevent the electrical equipment dry combustion method, protection electrical equipment, prevent the generation of accident.
The sensor can have a plurality of, receives in a plurality of electrical equipment the safe operation of control apparatus respectively.Because earth leakage protective device can not automatically reset, only after abnormal condition is got rid of. press the reset key of earth leakage protective device again, just can restore electricity. satisfied safety requirements.
At diode D1, D2, D3, D4 two ends difference shunt capacitance C2, C3, C4, the C6 of foregoing circuit, performance is better like this.
The mechanical part of tripping mechanism has a kind of open in detail in Chinese patent ZL032297467, and tripping mechanism can also adopt other mechanisms.
Because triggering the dropout principle has been known, therefore be not described in detail in this.
Claims (6)
1, safety plug, the phase that comprises belt switch, zero, ground three utmost points, be located at phase, zero sequence current mutual inductor between the zero line, the test loop, first amplifying circuit, DC power supply, release, ground wire is connected with fixed contact by the movable contact flexure strip, be installed with zero sequence current mutual inductor in the ground wire, it is characterized in that: the secondary output end of the zero sequence current mutual inductor in the described ground wire and second amplifying circuit are connected in parallel, and link to each other with the silicon controlled trigger electrode behind diode of output serial connection of second amplifying circuit, also link to each other with the silicon controlled trigger electrode behind diode of output serial connection of described first amplifying circuit.
2, safety plug as claimed in claim 1, it is characterized in that: also have temperature controller in the described plug, an end and the first amplifying circuit IC1 after its thermistor RT connects with resistance R 1, the positive source of the second amplifying circuit IC2 is connected, the other end is connected with an end of resistance R 2, the other end of R2 is connected with dc power cathode, the positive pole that is connected diode D3 between thermistor RT and the resistance R 2, the negative pole of diode D3 is connected with the trigger electrode of controllable silicon SCR, the anode of controllable silicon SCR is connected with the positive pole of DC power supply, and negative electrode links to each other with the negative pole of DC power supply.
3, safety plug as claimed in claim 2 is characterized in that: described thermistor places the zero line of plug and the middle insulator of pin of phase line.
4, as claim 1,2,3 described any safety plugs, it is characterized in that: also connect the anti-dry circuit: diode D4 of controllable silicon SCR trigger electrode series connection, diode D4 negative pole links to each other with the trigger electrode of controllable silicon SCR, the positive pole of diode D4 links to each other with resistance R 4, resistance R 4 links to each other with an end of transducer (1), the other end of transducer (1) is connected to any utmost point in the current supply circuit, dielectric capacitance C2 is connected the negative electrode of controllable silicon SCR with resistance R 3 backs in parallel one end, the other end connects the positive pole of diode D4.
5, as claim 1,2,3 described any safety plugs, it is characterized in that: the electric capacity in parallel of each diode in the described circuit.
6, safety plug as claimed in claim 4 is characterized in that: the electric capacity in parallel of each diode in the described circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610155460A CN100583571C (en) | 2006-12-23 | 2006-12-23 | Full-function secure plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610155460A CN100583571C (en) | 2006-12-23 | 2006-12-23 | Full-function secure plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101017947A CN101017947A (en) | 2007-08-15 |
| CN100583571C true CN100583571C (en) | 2010-01-20 |
Family
ID=38726770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610155460A Expired - Fee Related CN100583571C (en) | 2006-12-23 | 2006-12-23 | Full-function secure plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100583571C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354863B (en) * | 2011-06-23 | 2013-03-27 | 刘睿刚 | Electricity leakage protection plug |
| CN103022970B (en) * | 2011-09-23 | 2018-05-22 | 钱加灿 | Tape voltage protection with sensitivity |
| CN103066455B (en) * | 2012-10-31 | 2016-01-06 | 钱加灿 | There is the plug of temperature control circuit |
| CN103001073B (en) * | 2012-10-31 | 2016-01-13 | 钱加灿 | A kind of plug with attemperating unit |
| CN103187704A (en) * | 2013-03-28 | 2013-07-03 | 余姚市嘉荣电子电器有限公司 | Leakage protection device for preventing electrification of ground wire |
| CN103199489A (en) * | 2013-03-28 | 2013-07-10 | 余姚市嘉荣电子电器有限公司 | Ground wire leakage protection device |
| CN103187705A (en) * | 2013-03-28 | 2013-07-03 | 余姚市嘉荣电子电器有限公司 | Ground wire leakage protection device |
| CN104103973B (en) * | 2013-05-16 | 2017-04-12 | 介国安 | Zero protection and grounding general self-inspection single-phase three-pole integrated socket |
| CN103490238B (en) * | 2013-09-27 | 2016-06-29 | 余姚市嘉荣电子电器有限公司 | Leakage protecting plug |
| CN104767173B (en) * | 2015-03-20 | 2017-12-08 | 余姚市嘉荣电子电器有限公司 | Ground wire voltage exception earth leakage protective device is detected without IC optocouplers |
| CN117810912A (en) * | 2023-12-21 | 2024-04-02 | 杭州创美实业有限公司 | Leakage protector with automatic power supply and power-off functions |
-
2006
- 2006-12-23 CN CN200610155460A patent/CN100583571C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101017947A (en) | 2007-08-15 |
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Granted publication date: 20100120 Termination date: 20211223 |