CN101217232A - A total current type residual current operating device with functions of automatic tripping on element failures - Google Patents
A total current type residual current operating device with functions of automatic tripping on element failures Download PDFInfo
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- CN101217232A CN101217232A CNA2008100033550A CN200810003355A CN101217232A CN 101217232 A CN101217232 A CN 101217232A CN A2008100033550 A CNA2008100033550 A CN A2008100033550A CN 200810003355 A CN200810003355 A CN 200810003355A CN 101217232 A CN101217232 A CN 101217232A
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Abstract
The invention relates to a full current type residual current operation device with the function of automatic trip of the element faults, including a main power cord, a trip mechanism, a trip circuit 6, a power supply 8, a voltage stabilizing circuit 7, a sine wave voltage signal generator 1, a zero sequence current detector 2, a dual-channel voltage comparison circuit 3, a dual-channel signal detection circuit 4, a dual-channel delay gate circuit 5 and the trip circuit 6; when the main power supply generates the rated sine alternating current residual operation current, the pulsating direct current residual operation current and the smooth direct current residual operation current, the device can trip and cut off the power reliably within 0.1 second. The invention can further automatically trip and cut off the power when the sine wave voltage signal generator 1 and the zero sequence current detector 2 of the device have faults, thus achieving the safe power usage.
Description
Technical field
The present invention relates to a kind of residual current circuit breaker, particularly a kind of total current type residual current acting device with element fault automatic trip function.
Background technology
The residual current acting device (hereinafter to be referred as residual current circuit breaker) of wide usefulness in the present domestic electrical network; AC type residual current circuit breaker and A type residual current circuit breaker are arranged; AC type residual current circuit breaker is to the residue simple sinusoidal alternating current that applies suddenly or slowly rise guarantee the to thread off protection electrical equipment of outage, and A type residual current circuit breaker is to the residue simple sinusoidal alternating current that applies suddenly or slowly rise, residue pulsating direct current (being no more than the pulsating waveform of direct current 0.006A) electric current guarantee the to thread off protection electrical equipment of outage.As equipment with direct current network or the electricity consumption of use bridge rectifier electricity; when in case electric leakage or electric shock take place; the residual current circuit breaker of AC type or A type is the power-off protection of can't normally threading off, and therefore must use total current type residual current acting device (hereinafter to be referred as the Type B residual current circuit breaker).
Existing technology, Patent Office of the People's Republic of China's Granted publication on May 1st, 2005 is number in CN1083981C, direct current and ac sensor with current transformer of minor loop operation, an example, according to known mode, with just, losing side wave voltage signal (excited signal) imposes on magnetic test coil, be used at least once the instrument transformer driving being entered its range of linearity in each signal period, when instrument transformer during in the range of linearity to by detecting the current sample of winding, use differential amplifier, sampling and holding circuit, selector circuits etc. are handled back output and the proportional current signal of residual current.
Patent Office of the People's Republic of China's publication number on December 8th, 2005 is in CN1712973A, read the equipment of direct current and/or alternating current, an example, also be according to known mode, put on the coil around iron core with the excitation voltage signal that is fed back modulation, detect the voltage that feedback current causes with differential amplifier, after low-pass filtering, the voltage that output is directly proportional with residual current.
Patent Office of the People's Republic of China's publication number on December 25th, 2002 is in CN1387213A; be used for earth leakage protection Device Testing instrument transformer and earth leakage protection device; an example; equally according to known mode; be applied to the saturated flex point of the generation magnetic flux that magnetic flux and residual current produced formation magnetic circuit on the wound coil unshakable in one's determination with the triangular wave excited signal; the rectangular signal that produces with time interval, through integration relatively after output instruction signal.Make device tripping operation outage.
Patent US.4276510 current sensor, an example is also used same known manner.On the current transformer iron core, have centre tapped secondary winding and apply positive and negative excitation voltage, when residual current, two inductance differences that exciting curent produces, detect the difference of electric current with differential amplifier, produce an electric current that puts on the tertiary winding with this difference, to offset the influence of residual current.Become the value of residual current by the electric current of the 3rd group of winding.
Above-mentioned these detection methods when being used for the Type B leakage, breaking, have following shortcoming: when 1, breaking down, just can't detect residual current as the excited signal source, in case, when the residue operating current appears in main power circuit, the device power-off protection that can not trip.When 2, taking place to descend significantly as the magnetic property of transducer iron core, original specified residue operating current value just significantly rises, and makes it, and electric leakage sensitivity descends significantly, and above defective is so that loss of life or personal injury or property loss may take place.
Summary of the invention
Purpose of the present invention: 1, install when main power circuit interchange, pulsating direct current or smooth direct current electric leakage occur or gets an electric shock the outage of reliably to trip apace; When 2, breaking down as the excited signal source, the device power-off protection that can trip reliably; The device power-off protection that can reliably trip apace during 3, as the unshakable in one's determination degradation of current sensor.
The invention provides a kind of total current type residual current acting device with element fault automatic trip function, the technical scheme that is adopted, comprise main power line, tripping mechanism, trip circuit 6, power supply 8, voltage stabilizing circuit 7, described sine voltage signal generator 1 links with zero-sequence current detector 2, zero-sequence current detector 2 links with two pass voltage comparator circuit 3, two pass voltage comparator circuit 3 links with two pass signal detection circuit 4, two pass signal detection circuit 4 links with two pass time-delay gating circuit 5, and two pass time-delay gating circuit 5 links with trip circuit 6.Described sine voltage signal generator 1 applies the sine voltage signal of power less than 10 milliwatts to a winding HL2 of zero-sequence current detector 2.Described zero-sequence current detector 2 is to constitute the voltage transformation assembly by ring-shaped core winding HL2, winding HL3 and winding HL4, pass the voltage transformation assembly by main power line and form zero-sequence current detector 2, and winding HL3 and winding HL4 are that two prescriptions are to the induced voltage output winding opposite, that the number of turns equates.Described two pass voltage comparator circuit 3 is by resistance R 301, R302, R303, R304, R305, R306, R307, R308, potentiometer W301, W302, and ic chip 301, IC302 form.Described two pass signal detection circuit 4 is by integrated circuit (IC) 401, IC402, IC403, IC404, resistance R 401, R402, and capacitor C 401, C402 form.
Advantage of the present invention has improved the reliability of unit protection performance, and is low in energy consumption, positive and negative electric leakage sensitivity unanimity, and debugging is convenient, strong anti-interference performance, cost is low.
Below in conjunction with drawings and Examples detailed content of the present invention is described.
Description of drawings
But Fig. 1 is schematic diagram and the circuit theory diagrams of the present invention embodiment.
Fig. 2 be the present invention under holding state, the voltage signal ripple that induces on 2 liang of winding HL3 of zero-sequence current detector and the winding HL4.
Fig. 3 is a main power source of the present invention when specified residue operating current takes place, and zero-sequence current detector two winding HL3 or HL4 go up the voltage signal ripple of induction; Wherein Fig. 3 a is the voltage wave that simple alternating current residue operating current produces; Fig. 3 b is the voltage wave that pulsating direct current residue operating current produces; Fig. 3 c is the voltage wave that smooth direct current residue operating current produces.
Fig. 4 is a main power source of the present invention when specified residue operating current occurring, the signal wave of two pass time-delay gating circuit output; The pulse signal of exporting when wherein Fig. 4 a is simple alternating current residue operating current; The pulse signal that Fig. 4 b exports when being pulsating direct current residue operating current; The pulse signal that Fig. 4 c exports when being smooth direct current residue operating current.
Embodiment
As shown in Figure 1, the present invention is by sine voltage signal generator 1, zero-sequence current detector 2, two pass voltage comparator circuit 3, two pass signal detection circuit 4 and two pass time-delay gating circuit 5 are formed simple alternating current, pulsating direct current and smooth direct current electric leakage signal detecting circuit.Described two pass voltage comparator is linked in the winding HL3 of zero-sequence current detector 2 end by an end of resistance R 301, the other end of resistance R 301 links the negative pole of another termination stabilized voltage power supply 7 of resistance R 302 with an end and ic chip 301 end of oppisite phase of resistance R 302; One end of resistance R 303 1 ends and resistance R 304 and the in-phase end of ic chip 301 link, the other end of resistance R 304 connects the negative pole of stabilized voltage power supply 7, the center-side of the idiostatic device W301 of the other end of resistance R 303 links, potentiometer W301 two ends are just connecting stabilized voltage power supply 7 respectively, negative pole, 1 pin of ic chip 301 is in one voltage comparator output, another road voltage comparator is linked by an end of resistance R 305 and winding HL4 one end of zero-sequence current detector 2, the other end of resistance R 305 links with an end and ic chip 302 end of oppisite phase of resistance R 306, the negative pole of another termination stabilized voltage power supply 7 of resistance R 306, resistance R 307 1 ends and resistance R 308 1 ends and ic chip 302 in-phase ends link, the negative pole of another termination stabilized voltage power supply of resistance R 308, the center-side of the idiostatic device W302 of the other end of resistance R 307 links, potentiometer W302 two ends are just connecting stabilized voltage power supply 7 respectively, negative pole, 7 pin of ic chip 302 are in the output of another road voltage comparator.Potentiometer W301 and potentiometer W302 are respectively the usefulness of positive and negative residual current sensitivity adjusting, but independently.So as the magnetic loop deviation unshakable in one's determination of zero-sequence current detector, it is consistent that the positive and negative electric leakage sensitivity of apparatus of the present invention also can reach.Two pass signal detection circuit 4 is by CMOS integrated circuit (IC) 401, IC402, resistance R 401, and capacitor C 401 is formed one signal detector, 7 pin of integrated circuit (IC) 402 are in output, another road signal detector is by CMOS integrated circuit (IC) 403, IC404, resistance R 402, and capacitor C 402 is formed.9 pin of integrated circuit (IC) 404 are in output, and their effect is that output is in low level when predetermined pulse signal is imported, when in the input signal leakage signal being arranged, output is just exported a leakage signal pulse, and when no signal was imported, output was just in high level.
During this device busy, when not having residual current as main power circuit, device is in holding state.Sine voltage signal generator 1 applies frequency in about 800 hertz for the winding HL2 of zero-sequence current detector 2, electric current is less than the sine voltage signal of 1mA, induce the voltage signal that two groups of phase place opposite voltage equate on two winding HL3 of zero-sequence current detector 2 and the HL4, as shown in Figure 2, these two groups of voltage signals are defeated by two pass voltage comparator circuit 3 respectively and (are tuned to the threshold voltage of predetermined specified electric leakage sensitivity because of the threshold values of two pass voltage comparator circuit 3, therefore threshold values is lower than two winding voltage signal values), make the pulse signal of about two groups 800 hertz of two pass voltage comparator circuit 3 outputs, this pulse signal is imported two pass signal detection circuit 4 respectively, make two pass signal detection circuit 4 be in low level (no leakage signal output) the two pass time-delay gating circuit 5 of not opening, make the output of two pass time-delay gating circuit 5 Triggerless, device is in normal stand-by operation state.
When the residue operating current takes place in main power circuit; it is IA+IB+IC ≠ 0=I Δ; (I Δ) residual current makes the iron core of zero-sequence current detector 2 produce magnetic flux; flux vectors after this magnetic flux and original magnetic flux (the sinusoidal wave magnetic flux that produces of the 800Hz) stack; make the winding HL3 and the winding HL4 of zero-sequence current detector 2 go up induction output 800 hertz voltage signal as shown in Figure 3; the amplitude of this induced voltage signal is inversely proportional to residue operating current (I Δ); when residual current reaches rated value; the voltage signal amplitude of this residue operating current correspondence is lower than comparison threshold values (as shown in Figure 3); through two pass voltage comparator circuit 3; output signal after two pass signal detection circuit 4 and two pass time-delay gating circuit 5 are handled as shown in Figure 4; this signal input trip circuit; it is electric that trip circuit is got, and promotes tripping mechanism tripping operation power-off protection.
The enforcement principle that goes up according to this, as sine voltage signal generator 1, break down, when no excitation voltage signal is exported, the winding HL3 of zero-sequence current detector 2 and winding HL4 go up non-inductive signal output, also pulse-free signal output of two pass voltage comparator 3, at this moment two pass signal detection circuit 4 is in high level output, make the triggering signal input trip circuit 6 of two pass time-delay gating circuit output shown in Fig. 4 c, make trip circuit 6 trigger energising, promote tripping mechanism tripping operation outage, the function of power-off protection when reaching sine voltage signal generator 1 and breaking down; Break down as zero sequence circuit detector 2; the amplitude of the induced voltage signal when Magnetic Performance Core descends on winding HL3 and the HL4 just descends; when amplitude is lower than the threshold voltage that the predetermined specified residue operating currents of two pass voltage comparator circuit 3 are transferred; two pass voltage comparator circuit 3 is exported to two pass signal detection circuit 4 with regard to pulse-free signal; make two pass signal detection circuit 4 be in high level output; open two pass time-delay gating circuit 5; make the triggering signal of two pass time-delay gating circuit 5 outputs shown in Fig. 4 c; this signal input trip circuit 6 triggers energising and promotes tripping mechanism tripping operation power-off protection, more than implements the purpose that principle has reached the total current type residual current acting device with element fault automatic trip function.
Winding HL3 on the above-described zero-sequence current detector 2 and winding HL4 also can be fit to embodiments of the invention with having centre tapped winding.
Described other elements combination of two pass voltage comparator circuit 3 usefulness becomes the two pass voltage comparator circuit to be fit to embodiments of the invention equally.
Described other elements combination of two pass signal detection circuit 4 usefulness becomes the two pass signal detection circuit to be fit to embodiments of the invention equally.
Claims (5)
1. total current type residual current acting device with element fault automatic trip function, comprise main power line, tripping mechanism, trip circuit (6), power supply (8), voltage stabilizing circuit (7), it is characterized in that described sine voltage signal generator (1) and zero-sequence current detector (2) link, zero-sequence current detector (2) links with two pass voltage comparator circuit (3), two pass voltage comparator circuit (3) links with two pass signal detection circuit (4), two pass signal detection circuit (4) links with two pass time-delay gating circuit (5), and two pass time-delay gating circuit (5) links with trip circuit (6).
2. the total current type residual current acting device with element fault automatic trip function according to claim 1 is characterized in that described sine voltage signal generator (1) applies the sine voltage signal of power less than 10 milliwatts to a winding HL2 of zero-sequence current detector (2).
3. the total current type residual current acting device with element fault automatic trip function according to claim 1, it is characterized in that described zero-sequence current detector (2) is to constitute the voltage transformation assembly by ring-shaped core winding HL2, winding HL3 and winding HL4, pass the voltage transformation assembly by main power line and form zero-sequence current detector (2), and winding HL3 and winding HL4 are that two prescriptions are to the induced voltage output winding opposite, that the number of turns equates.
4. the total current type residual current acting device with element fault automatic trip function according to claim 1, it is characterized in that described two pass voltage comparator circuit (3) is by resistance R 301, R302, R303, R304, R305, R306, R307, R308, potentiometer W301, W302, ic chip 301, IC302 form.
5. the total current type residual current acting device with element fault automatic trip function according to claim 1, it is characterized in that described two pass signal detection circuit (4) is by integrated circuit (IC) 401, IC402, IC403, IC404, resistance R 401, R402, capacitor C 401, C402 form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100033550A CN101217232B (en) | 2008-01-14 | 2008-01-14 | A total current type residual current operating device with functions of automatic tripping on element failures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100033550A CN101217232B (en) | 2008-01-14 | 2008-01-14 | A total current type residual current operating device with functions of automatic tripping on element failures |
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| Publication Number | Publication Date |
|---|---|
| CN101217232A true CN101217232A (en) | 2008-07-09 |
| CN101217232B CN101217232B (en) | 2010-12-15 |
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| CN2008100033550A Expired - Fee Related CN101217232B (en) | 2008-01-14 | 2008-01-14 | A total current type residual current operating device with functions of automatic tripping on element failures |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104659742A (en) * | 2013-11-15 | 2015-05-27 | 西门子公司 | Residual current device |
| WO2015139655A1 (en) * | 2014-03-21 | 2015-09-24 | 上海电科电器科技有限公司 | Residual current protection device |
| CN105680415A (en) * | 2016-03-12 | 2016-06-15 | 王继杰 | B type residual current operated circuit breaker |
| CN105830301A (en) * | 2013-12-18 | 2016-08-03 | 泽尼西文有限公司 | Digital current leakage breaker |
| CN107332207A (en) * | 2017-08-30 | 2017-11-07 | 乐清拓优电气有限公司 | A kind of sensitive failture current protection device of alternating current-direct current |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4293035B2 (en) * | 2003-05-07 | 2009-07-08 | セイコーエプソン株式会社 | Liquid repellent film covering member, component of liquid ejection device, nozzle plate of liquid ejection head, liquid ejection head, and liquid ejection device |
-
2008
- 2008-01-14 CN CN2008100033550A patent/CN101217232B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104659742A (en) * | 2013-11-15 | 2015-05-27 | 西门子公司 | Residual current device |
| CN104659742B (en) * | 2013-11-15 | 2018-04-17 | 西门子公司 | A kind of residual current device |
| CN105830301A (en) * | 2013-12-18 | 2016-08-03 | 泽尼西文有限公司 | Digital current leakage breaker |
| CN105830301B (en) * | 2013-12-18 | 2018-09-14 | 泽尼西文有限公司 | Digital leakage circuit breakers |
| WO2015139655A1 (en) * | 2014-03-21 | 2015-09-24 | 上海电科电器科技有限公司 | Residual current protection device |
| EP3121921B1 (en) | 2014-03-21 | 2019-03-20 | Seari Electric Technology Co., Ltd. | Residual current protection device |
| CN105680415A (en) * | 2016-03-12 | 2016-06-15 | 王继杰 | B type residual current operated circuit breaker |
| CN107332207A (en) * | 2017-08-30 | 2017-11-07 | 乐清拓优电气有限公司 | A kind of sensitive failture current protection device of alternating current-direct current |
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| Publication number | Publication date |
|---|---|
| CN101217232B (en) | 2010-12-15 |
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Granted publication date: 20101215 Termination date: 20170114 |